Bug Summary

File:clang/lib/CodeGen/CGDebugInfo.cpp
Warning:line 1613, column 19
Called C++ object pointer is null

Annotated Source Code

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clang -cc1 -cc1 -triple x86_64-pc-linux-gnu -analyze -disable-free -disable-llvm-verifier -discard-value-names -main-file-name CGDebugInfo.cpp -analyzer-store=region -analyzer-opt-analyze-nested-blocks -analyzer-checker=core -analyzer-checker=apiModeling -analyzer-checker=unix -analyzer-checker=deadcode -analyzer-checker=cplusplus -analyzer-checker=security.insecureAPI.UncheckedReturn -analyzer-checker=security.insecureAPI.getpw -analyzer-checker=security.insecureAPI.gets -analyzer-checker=security.insecureAPI.mktemp -analyzer-checker=security.insecureAPI.mkstemp -analyzer-checker=security.insecureAPI.vfork -analyzer-checker=nullability.NullPassedToNonnull -analyzer-checker=nullability.NullReturnedFromNonnull -analyzer-output plist -w -setup-static-analyzer -analyzer-config-compatibility-mode=true -mrelocation-model pic -pic-level 2 -fhalf-no-semantic-interposition -mframe-pointer=none -relaxed-aliasing -fmath-errno -fno-rounding-math -mconstructor-aliases -munwind-tables -target-cpu x86-64 -tune-cpu generic -debugger-tuning=gdb -ffunction-sections -fdata-sections -fcoverage-compilation-dir=/build/llvm-toolchain-snapshot-13~++20210405022414+5f57793c4fe4/build-llvm/tools/clang/lib/CodeGen -resource-dir /usr/lib/llvm-13/lib/clang/13.0.0 -D CLANG_ROUND_TRIP_CC1_ARGS=ON -D _DEBUG -D _GNU_SOURCE -D __STDC_CONSTANT_MACROS -D __STDC_FORMAT_MACROS -D __STDC_LIMIT_MACROS -I /build/llvm-toolchain-snapshot-13~++20210405022414+5f57793c4fe4/build-llvm/tools/clang/lib/CodeGen -I /build/llvm-toolchain-snapshot-13~++20210405022414+5f57793c4fe4/clang/lib/CodeGen -I /build/llvm-toolchain-snapshot-13~++20210405022414+5f57793c4fe4/clang/include -I /build/llvm-toolchain-snapshot-13~++20210405022414+5f57793c4fe4/build-llvm/tools/clang/include -I /build/llvm-toolchain-snapshot-13~++20210405022414+5f57793c4fe4/build-llvm/include -I /build/llvm-toolchain-snapshot-13~++20210405022414+5f57793c4fe4/llvm/include -U NDEBUG -internal-isystem /usr/lib/gcc/x86_64-linux-gnu/6.3.0/../../../../include/c++/6.3.0 -internal-isystem /usr/lib/gcc/x86_64-linux-gnu/6.3.0/../../../../include/x86_64-linux-gnu/c++/6.3.0 -internal-isystem /usr/lib/gcc/x86_64-linux-gnu/6.3.0/../../../../include/c++/6.3.0/backward -internal-isystem /usr/local/include -internal-isystem /usr/lib/gcc/x86_64-linux-gnu/6.3.0/../../../../x86_64-linux-gnu/include -internal-isystem /usr/lib/llvm-13/lib/clang/13.0.0/include -internal-externc-isystem /usr/include/x86_64-linux-gnu -internal-externc-isystem /include -internal-externc-isystem /usr/include -O2 -Wno-unused-parameter -Wwrite-strings -Wno-missing-field-initializers -Wno-long-long -Wno-maybe-uninitialized -Wno-comment -std=c++14 -fdeprecated-macro -fdebug-compilation-dir=/build/llvm-toolchain-snapshot-13~++20210405022414+5f57793c4fe4/build-llvm/tools/clang/lib/CodeGen -fdebug-prefix-map=/build/llvm-toolchain-snapshot-13~++20210405022414+5f57793c4fe4=. -ferror-limit 19 -fvisibility-inlines-hidden -stack-protector 2 -fgnuc-version=4.2.1 -vectorize-loops -vectorize-slp -analyzer-output=html -analyzer-config stable-report-filename=true -faddrsig -D__GCC_HAVE_DWARF2_CFI_ASM=1 -o /tmp/scan-build-2021-04-05-202135-9119-1 -x c++ /build/llvm-toolchain-snapshot-13~++20210405022414+5f57793c4fe4/clang/lib/CodeGen/CGDebugInfo.cpp

/build/llvm-toolchain-snapshot-13~++20210405022414+5f57793c4fe4/clang/lib/CodeGen/CGDebugInfo.cpp

1//===--- CGDebugInfo.cpp - Emit Debug Information for a Module ------------===//
2//
3// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4// See https://llvm.org/LICENSE.txt for license information.
5// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6//
7//===----------------------------------------------------------------------===//
8//
9// This coordinates the debug information generation while generating code.
10//
11//===----------------------------------------------------------------------===//
12
13#include "CGDebugInfo.h"
14#include "CGBlocks.h"
15#include "CGCXXABI.h"
16#include "CGObjCRuntime.h"
17#include "CGRecordLayout.h"
18#include "CodeGenFunction.h"
19#include "CodeGenModule.h"
20#include "ConstantEmitter.h"
21#include "clang/AST/ASTContext.h"
22#include "clang/AST/Attr.h"
23#include "clang/AST/DeclFriend.h"
24#include "clang/AST/DeclObjC.h"
25#include "clang/AST/DeclTemplate.h"
26#include "clang/AST/Expr.h"
27#include "clang/AST/RecordLayout.h"
28#include "clang/Basic/CodeGenOptions.h"
29#include "clang/Basic/FileManager.h"
30#include "clang/Basic/SourceManager.h"
31#include "clang/Basic/Version.h"
32#include "clang/Frontend/FrontendOptions.h"
33#include "clang/Lex/HeaderSearchOptions.h"
34#include "clang/Lex/ModuleMap.h"
35#include "clang/Lex/PreprocessorOptions.h"
36#include "llvm/ADT/DenseSet.h"
37#include "llvm/ADT/SmallVector.h"
38#include "llvm/ADT/StringExtras.h"
39#include "llvm/IR/Constants.h"
40#include "llvm/IR/DataLayout.h"
41#include "llvm/IR/DerivedTypes.h"
42#include "llvm/IR/Instructions.h"
43#include "llvm/IR/Intrinsics.h"
44#include "llvm/IR/Metadata.h"
45#include "llvm/IR/Module.h"
46#include "llvm/Support/FileSystem.h"
47#include "llvm/Support/MD5.h"
48#include "llvm/Support/Path.h"
49#include "llvm/Support/TimeProfiler.h"
50using namespace clang;
51using namespace clang::CodeGen;
52
53static uint32_t getTypeAlignIfRequired(const Type *Ty, const ASTContext &Ctx) {
54 auto TI = Ctx.getTypeInfo(Ty);
55 return TI.AlignIsRequired ? TI.Align : 0;
56}
57
58static uint32_t getTypeAlignIfRequired(QualType Ty, const ASTContext &Ctx) {
59 return getTypeAlignIfRequired(Ty.getTypePtr(), Ctx);
60}
61
62static uint32_t getDeclAlignIfRequired(const Decl *D, const ASTContext &Ctx) {
63 return D->hasAttr<AlignedAttr>() ? D->getMaxAlignment() : 0;
64}
65
66CGDebugInfo::CGDebugInfo(CodeGenModule &CGM)
67 : CGM(CGM), DebugKind(CGM.getCodeGenOpts().getDebugInfo()),
68 DebugTypeExtRefs(CGM.getCodeGenOpts().DebugTypeExtRefs),
69 DBuilder(CGM.getModule()) {
70 for (const auto &KV : CGM.getCodeGenOpts().DebugPrefixMap)
71 DebugPrefixMap[KV.first] = KV.second;
72 CreateCompileUnit();
73}
74
75CGDebugInfo::~CGDebugInfo() {
76 assert(LexicalBlockStack.empty() &&((LexicalBlockStack.empty() && "Region stack mismatch, stack not empty!"
) ? static_cast<void> (0) : __assert_fail ("LexicalBlockStack.empty() && \"Region stack mismatch, stack not empty!\""
, "/build/llvm-toolchain-snapshot-13~++20210405022414+5f57793c4fe4/clang/lib/CodeGen/CGDebugInfo.cpp"
, 77, __PRETTY_FUNCTION__))
77 "Region stack mismatch, stack not empty!")((LexicalBlockStack.empty() && "Region stack mismatch, stack not empty!"
) ? static_cast<void> (0) : __assert_fail ("LexicalBlockStack.empty() && \"Region stack mismatch, stack not empty!\""
, "/build/llvm-toolchain-snapshot-13~++20210405022414+5f57793c4fe4/clang/lib/CodeGen/CGDebugInfo.cpp"
, 77, __PRETTY_FUNCTION__))
;
78}
79
80ApplyDebugLocation::ApplyDebugLocation(CodeGenFunction &CGF,
81 SourceLocation TemporaryLocation)
82 : CGF(&CGF) {
83 init(TemporaryLocation);
84}
85
86ApplyDebugLocation::ApplyDebugLocation(CodeGenFunction &CGF,
87 bool DefaultToEmpty,
88 SourceLocation TemporaryLocation)
89 : CGF(&CGF) {
90 init(TemporaryLocation, DefaultToEmpty);
91}
92
93void ApplyDebugLocation::init(SourceLocation TemporaryLocation,
94 bool DefaultToEmpty) {
95 auto *DI = CGF->getDebugInfo();
96 if (!DI) {
97 CGF = nullptr;
98 return;
99 }
100
101 OriginalLocation = CGF->Builder.getCurrentDebugLocation();
102
103 if (OriginalLocation && !DI->CGM.getExpressionLocationsEnabled())
104 return;
105
106 if (TemporaryLocation.isValid()) {
107 DI->EmitLocation(CGF->Builder, TemporaryLocation);
108 return;
109 }
110
111 if (DefaultToEmpty) {
112 CGF->Builder.SetCurrentDebugLocation(llvm::DebugLoc());
113 return;
114 }
115
116 // Construct a location that has a valid scope, but no line info.
117 assert(!DI->LexicalBlockStack.empty())((!DI->LexicalBlockStack.empty()) ? static_cast<void>
(0) : __assert_fail ("!DI->LexicalBlockStack.empty()", "/build/llvm-toolchain-snapshot-13~++20210405022414+5f57793c4fe4/clang/lib/CodeGen/CGDebugInfo.cpp"
, 117, __PRETTY_FUNCTION__))
;
118 CGF->Builder.SetCurrentDebugLocation(
119 llvm::DILocation::get(DI->LexicalBlockStack.back()->getContext(), 0, 0,
120 DI->LexicalBlockStack.back(), DI->getInlinedAt()));
121}
122
123ApplyDebugLocation::ApplyDebugLocation(CodeGenFunction &CGF, const Expr *E)
124 : CGF(&CGF) {
125 init(E->getExprLoc());
126}
127
128ApplyDebugLocation::ApplyDebugLocation(CodeGenFunction &CGF, llvm::DebugLoc Loc)
129 : CGF(&CGF) {
130 if (!CGF.getDebugInfo()) {
131 this->CGF = nullptr;
132 return;
133 }
134 OriginalLocation = CGF.Builder.getCurrentDebugLocation();
135 if (Loc)
136 CGF.Builder.SetCurrentDebugLocation(std::move(Loc));
137}
138
139ApplyDebugLocation::~ApplyDebugLocation() {
140 // Query CGF so the location isn't overwritten when location updates are
141 // temporarily disabled (for C++ default function arguments)
142 if (CGF)
143 CGF->Builder.SetCurrentDebugLocation(std::move(OriginalLocation));
144}
145
146ApplyInlineDebugLocation::ApplyInlineDebugLocation(CodeGenFunction &CGF,
147 GlobalDecl InlinedFn)
148 : CGF(&CGF) {
149 if (!CGF.getDebugInfo()) {
150 this->CGF = nullptr;
151 return;
152 }
153 auto &DI = *CGF.getDebugInfo();
154 SavedLocation = DI.getLocation();
155 assert((DI.getInlinedAt() ==(((DI.getInlinedAt() == CGF.Builder.getCurrentDebugLocation()
->getInlinedAt()) && "CGDebugInfo and IRBuilder are out of sync"
) ? static_cast<void> (0) : __assert_fail ("(DI.getInlinedAt() == CGF.Builder.getCurrentDebugLocation()->getInlinedAt()) && \"CGDebugInfo and IRBuilder are out of sync\""
, "/build/llvm-toolchain-snapshot-13~++20210405022414+5f57793c4fe4/clang/lib/CodeGen/CGDebugInfo.cpp"
, 157, __PRETTY_FUNCTION__))
156 CGF.Builder.getCurrentDebugLocation()->getInlinedAt()) &&(((DI.getInlinedAt() == CGF.Builder.getCurrentDebugLocation()
->getInlinedAt()) && "CGDebugInfo and IRBuilder are out of sync"
) ? static_cast<void> (0) : __assert_fail ("(DI.getInlinedAt() == CGF.Builder.getCurrentDebugLocation()->getInlinedAt()) && \"CGDebugInfo and IRBuilder are out of sync\""
, "/build/llvm-toolchain-snapshot-13~++20210405022414+5f57793c4fe4/clang/lib/CodeGen/CGDebugInfo.cpp"
, 157, __PRETTY_FUNCTION__))
157 "CGDebugInfo and IRBuilder are out of sync")(((DI.getInlinedAt() == CGF.Builder.getCurrentDebugLocation()
->getInlinedAt()) && "CGDebugInfo and IRBuilder are out of sync"
) ? static_cast<void> (0) : __assert_fail ("(DI.getInlinedAt() == CGF.Builder.getCurrentDebugLocation()->getInlinedAt()) && \"CGDebugInfo and IRBuilder are out of sync\""
, "/build/llvm-toolchain-snapshot-13~++20210405022414+5f57793c4fe4/clang/lib/CodeGen/CGDebugInfo.cpp"
, 157, __PRETTY_FUNCTION__))
;
158
159 DI.EmitInlineFunctionStart(CGF.Builder, InlinedFn);
160}
161
162ApplyInlineDebugLocation::~ApplyInlineDebugLocation() {
163 if (!CGF)
164 return;
165 auto &DI = *CGF->getDebugInfo();
166 DI.EmitInlineFunctionEnd(CGF->Builder);
167 DI.EmitLocation(CGF->Builder, SavedLocation);
168}
169
170void CGDebugInfo::setLocation(SourceLocation Loc) {
171 // If the new location isn't valid return.
172 if (Loc.isInvalid())
173 return;
174
175 CurLoc = CGM.getContext().getSourceManager().getExpansionLoc(Loc);
176
177 // If we've changed files in the middle of a lexical scope go ahead
178 // and create a new lexical scope with file node if it's different
179 // from the one in the scope.
180 if (LexicalBlockStack.empty())
181 return;
182
183 SourceManager &SM = CGM.getContext().getSourceManager();
184 auto *Scope = cast<llvm::DIScope>(LexicalBlockStack.back());
185 PresumedLoc PCLoc = SM.getPresumedLoc(CurLoc);
186 if (PCLoc.isInvalid() || Scope->getFile() == getOrCreateFile(CurLoc))
187 return;
188
189 if (auto *LBF = dyn_cast<llvm::DILexicalBlockFile>(Scope)) {
190 LexicalBlockStack.pop_back();
191 LexicalBlockStack.emplace_back(DBuilder.createLexicalBlockFile(
192 LBF->getScope(), getOrCreateFile(CurLoc)));
193 } else if (isa<llvm::DILexicalBlock>(Scope) ||
194 isa<llvm::DISubprogram>(Scope)) {
195 LexicalBlockStack.pop_back();
196 LexicalBlockStack.emplace_back(
197 DBuilder.createLexicalBlockFile(Scope, getOrCreateFile(CurLoc)));
198 }
199}
200
201llvm::DIScope *CGDebugInfo::getDeclContextDescriptor(const Decl *D) {
202 llvm::DIScope *Mod = getParentModuleOrNull(D);
203 return getContextDescriptor(cast<Decl>(D->getDeclContext()),
204 Mod ? Mod : TheCU);
205}
206
207llvm::DIScope *CGDebugInfo::getContextDescriptor(const Decl *Context,
208 llvm::DIScope *Default) {
209 if (!Context)
210 return Default;
211
212 auto I = RegionMap.find(Context);
213 if (I != RegionMap.end()) {
214 llvm::Metadata *V = I->second;
215 return dyn_cast_or_null<llvm::DIScope>(V);
216 }
217
218 // Check namespace.
219 if (const auto *NSDecl = dyn_cast<NamespaceDecl>(Context))
220 return getOrCreateNamespace(NSDecl);
221
222 if (const auto *RDecl = dyn_cast<RecordDecl>(Context))
223 if (!RDecl->isDependentType())
224 return getOrCreateType(CGM.getContext().getTypeDeclType(RDecl),
225 TheCU->getFile());
226 return Default;
227}
228
229PrintingPolicy CGDebugInfo::getPrintingPolicy() const {
230 PrintingPolicy PP = CGM.getContext().getPrintingPolicy();
231
232 // If we're emitting codeview, it's important to try to match MSVC's naming so
233 // that visualizers written for MSVC will trigger for our class names. In
234 // particular, we can't have spaces between arguments of standard templates
235 // like basic_string and vector, but we must have spaces between consecutive
236 // angle brackets that close nested template argument lists.
237 if (CGM.getCodeGenOpts().EmitCodeView) {
238 PP.MSVCFormatting = true;
239 PP.SplitTemplateClosers = true;
240 } else {
241 // For DWARF, printing rules are underspecified.
242 // SplitTemplateClosers yields better interop with GCC and GDB (PR46052).
243 PP.SplitTemplateClosers = true;
244 }
245
246 // Apply -fdebug-prefix-map.
247 PP.Callbacks = &PrintCB;
248 return PP;
249}
250
251StringRef CGDebugInfo::getFunctionName(const FunctionDecl *FD) {
252 assert(FD && "Invalid FunctionDecl!")((FD && "Invalid FunctionDecl!") ? static_cast<void
> (0) : __assert_fail ("FD && \"Invalid FunctionDecl!\""
, "/build/llvm-toolchain-snapshot-13~++20210405022414+5f57793c4fe4/clang/lib/CodeGen/CGDebugInfo.cpp"
, 252, __PRETTY_FUNCTION__))
;
253 IdentifierInfo *FII = FD->getIdentifier();
254 FunctionTemplateSpecializationInfo *Info =
255 FD->getTemplateSpecializationInfo();
256
257 if (!Info && FII)
258 return FII->getName();
259
260 SmallString<128> NS;
261 llvm::raw_svector_ostream OS(NS);
262 FD->printName(OS);
263
264 // Add any template specialization args.
265 if (Info) {
266 const TemplateArgumentList *TArgs = Info->TemplateArguments;
267 printTemplateArgumentList(OS, TArgs->asArray(), getPrintingPolicy());
268 }
269
270 // Copy this name on the side and use its reference.
271 return internString(OS.str());
272}
273
274StringRef CGDebugInfo::getObjCMethodName(const ObjCMethodDecl *OMD) {
275 SmallString<256> MethodName;
276 llvm::raw_svector_ostream OS(MethodName);
277 OS << (OMD->isInstanceMethod() ? '-' : '+') << '[';
278 const DeclContext *DC = OMD->getDeclContext();
279 if (const auto *OID = dyn_cast<ObjCImplementationDecl>(DC)) {
280 OS << OID->getName();
281 } else if (const auto *OID = dyn_cast<ObjCInterfaceDecl>(DC)) {
282 OS << OID->getName();
283 } else if (const auto *OC = dyn_cast<ObjCCategoryDecl>(DC)) {
284 if (OC->IsClassExtension()) {
285 OS << OC->getClassInterface()->getName();
286 } else {
287 OS << OC->getIdentifier()->getNameStart() << '('
288 << OC->getIdentifier()->getNameStart() << ')';
289 }
290 } else if (const auto *OCD = dyn_cast<ObjCCategoryImplDecl>(DC)) {
291 OS << OCD->getClassInterface()->getName() << '(' << OCD->getName() << ')';
292 }
293 OS << ' ' << OMD->getSelector().getAsString() << ']';
294
295 return internString(OS.str());
296}
297
298StringRef CGDebugInfo::getSelectorName(Selector S) {
299 return internString(S.getAsString());
300}
301
302StringRef CGDebugInfo::getClassName(const RecordDecl *RD) {
303 if (isa<ClassTemplateSpecializationDecl>(RD)) {
304 SmallString<128> Name;
305 llvm::raw_svector_ostream OS(Name);
306 PrintingPolicy PP = getPrintingPolicy();
307 PP.PrintCanonicalTypes = true;
308 RD->getNameForDiagnostic(OS, PP,
309 /*Qualified*/ false);
310
311 // Copy this name on the side and use its reference.
312 return internString(Name);
313 }
314
315 // quick optimization to avoid having to intern strings that are already
316 // stored reliably elsewhere
317 if (const IdentifierInfo *II = RD->getIdentifier())
318 return II->getName();
319
320 // The CodeView printer in LLVM wants to see the names of unnamed types
321 // because they need to have a unique identifier.
322 // These names are used to reconstruct the fully qualified type names.
323 if (CGM.getCodeGenOpts().EmitCodeView) {
324 if (const TypedefNameDecl *D = RD->getTypedefNameForAnonDecl()) {
325 assert(RD->getDeclContext() == D->getDeclContext() &&((RD->getDeclContext() == D->getDeclContext() &&
"Typedef should not be in another decl context!") ? static_cast
<void> (0) : __assert_fail ("RD->getDeclContext() == D->getDeclContext() && \"Typedef should not be in another decl context!\""
, "/build/llvm-toolchain-snapshot-13~++20210405022414+5f57793c4fe4/clang/lib/CodeGen/CGDebugInfo.cpp"
, 326, __PRETTY_FUNCTION__))
326 "Typedef should not be in another decl context!")((RD->getDeclContext() == D->getDeclContext() &&
"Typedef should not be in another decl context!") ? static_cast
<void> (0) : __assert_fail ("RD->getDeclContext() == D->getDeclContext() && \"Typedef should not be in another decl context!\""
, "/build/llvm-toolchain-snapshot-13~++20210405022414+5f57793c4fe4/clang/lib/CodeGen/CGDebugInfo.cpp"
, 326, __PRETTY_FUNCTION__))
;
327 assert(D->getDeclName().getAsIdentifierInfo() &&((D->getDeclName().getAsIdentifierInfo() && "Typedef was not named!"
) ? static_cast<void> (0) : __assert_fail ("D->getDeclName().getAsIdentifierInfo() && \"Typedef was not named!\""
, "/build/llvm-toolchain-snapshot-13~++20210405022414+5f57793c4fe4/clang/lib/CodeGen/CGDebugInfo.cpp"
, 328, __PRETTY_FUNCTION__))
328 "Typedef was not named!")((D->getDeclName().getAsIdentifierInfo() && "Typedef was not named!"
) ? static_cast<void> (0) : __assert_fail ("D->getDeclName().getAsIdentifierInfo() && \"Typedef was not named!\""
, "/build/llvm-toolchain-snapshot-13~++20210405022414+5f57793c4fe4/clang/lib/CodeGen/CGDebugInfo.cpp"
, 328, __PRETTY_FUNCTION__))
;
329 return D->getDeclName().getAsIdentifierInfo()->getName();
330 }
331
332 if (CGM.getLangOpts().CPlusPlus) {
333 StringRef Name;
334
335 ASTContext &Context = CGM.getContext();
336 if (const DeclaratorDecl *DD = Context.getDeclaratorForUnnamedTagDecl(RD))
337 // Anonymous types without a name for linkage purposes have their
338 // declarator mangled in if they have one.
339 Name = DD->getName();
340 else if (const TypedefNameDecl *TND =
341 Context.getTypedefNameForUnnamedTagDecl(RD))
342 // Anonymous types without a name for linkage purposes have their
343 // associate typedef mangled in if they have one.
344 Name = TND->getName();
345
346 // Give lambdas a display name based on their name mangling.
347 if (const CXXRecordDecl *CXXRD = dyn_cast<CXXRecordDecl>(RD))
348 if (CXXRD->isLambda())
349 return internString(
350 CGM.getCXXABI().getMangleContext().getLambdaString(CXXRD));
351
352 if (!Name.empty()) {
353 SmallString<256> UnnamedType("<unnamed-type-");
354 UnnamedType += Name;
355 UnnamedType += '>';
356 return internString(UnnamedType);
357 }
358 }
359 }
360
361 return StringRef();
362}
363
364Optional<llvm::DIFile::ChecksumKind>
365CGDebugInfo::computeChecksum(FileID FID, SmallString<32> &Checksum) const {
366 Checksum.clear();
367
368 if (!CGM.getCodeGenOpts().EmitCodeView &&
369 CGM.getCodeGenOpts().DwarfVersion < 5)
370 return None;
371
372 SourceManager &SM = CGM.getContext().getSourceManager();
373 Optional<llvm::MemoryBufferRef> MemBuffer = SM.getBufferOrNone(FID);
374 if (!MemBuffer)
375 return None;
376
377 llvm::MD5 Hash;
378 llvm::MD5::MD5Result Result;
379
380 Hash.update(MemBuffer->getBuffer());
381 Hash.final(Result);
382
383 Hash.stringifyResult(Result, Checksum);
384 return llvm::DIFile::CSK_MD5;
385}
386
387Optional<StringRef> CGDebugInfo::getSource(const SourceManager &SM,
388 FileID FID) {
389 if (!CGM.getCodeGenOpts().EmbedSource)
390 return None;
391
392 bool SourceInvalid = false;
393 StringRef Source = SM.getBufferData(FID, &SourceInvalid);
394
395 if (SourceInvalid)
396 return None;
397
398 return Source;
399}
400
401llvm::DIFile *CGDebugInfo::getOrCreateFile(SourceLocation Loc) {
402 SourceManager &SM = CGM.getContext().getSourceManager();
403 StringRef FileName;
404 FileID FID;
405
406 if (Loc.isInvalid()) {
407 // The DIFile used by the CU is distinct from the main source file. Call
408 // createFile() below for canonicalization if the source file was specified
409 // with an absolute path.
410 FileName = TheCU->getFile()->getFilename();
411 } else {
412 PresumedLoc PLoc = SM.getPresumedLoc(Loc);
413 FileName = PLoc.getFilename();
414
415 if (FileName.empty()) {
416 FileName = TheCU->getFile()->getFilename();
417 } else {
418 FileName = PLoc.getFilename();
419 }
420 FID = PLoc.getFileID();
421 }
422
423 // Cache the results.
424 auto It = DIFileCache.find(FileName.data());
425 if (It != DIFileCache.end()) {
426 // Verify that the information still exists.
427 if (llvm::Metadata *V = It->second)
428 return cast<llvm::DIFile>(V);
429 }
430
431 SmallString<32> Checksum;
432
433 Optional<llvm::DIFile::ChecksumKind> CSKind = computeChecksum(FID, Checksum);
434 Optional<llvm::DIFile::ChecksumInfo<StringRef>> CSInfo;
435 if (CSKind)
436 CSInfo.emplace(*CSKind, Checksum);
437 return createFile(FileName, CSInfo, getSource(SM, SM.getFileID(Loc)));
438}
439
440llvm::DIFile *
441CGDebugInfo::createFile(StringRef FileName,
442 Optional<llvm::DIFile::ChecksumInfo<StringRef>> CSInfo,
443 Optional<StringRef> Source) {
444 StringRef Dir;
445 StringRef File;
446 std::string RemappedFile = remapDIPath(FileName);
447 std::string CurDir = remapDIPath(getCurrentDirname());
448 SmallString<128> DirBuf;
449 SmallString<128> FileBuf;
450 if (llvm::sys::path::is_absolute(RemappedFile)) {
451 // Strip the common prefix (if it is more than just "/") from current
452 // directory and FileName for a more space-efficient encoding.
453 auto FileIt = llvm::sys::path::begin(RemappedFile);
454 auto FileE = llvm::sys::path::end(RemappedFile);
455 auto CurDirIt = llvm::sys::path::begin(CurDir);
456 auto CurDirE = llvm::sys::path::end(CurDir);
457 for (; CurDirIt != CurDirE && *CurDirIt == *FileIt; ++CurDirIt, ++FileIt)
458 llvm::sys::path::append(DirBuf, *CurDirIt);
459 if (std::distance(llvm::sys::path::begin(CurDir), CurDirIt) == 1) {
460 // Don't strip the common prefix if it is only the root "/"
461 // since that would make LLVM diagnostic locations confusing.
462 Dir = {};
463 File = RemappedFile;
464 } else {
465 for (; FileIt != FileE; ++FileIt)
466 llvm::sys::path::append(FileBuf, *FileIt);
467 Dir = DirBuf;
468 File = FileBuf;
469 }
470 } else {
471 Dir = CurDir;
472 File = RemappedFile;
473 }
474 llvm::DIFile *F = DBuilder.createFile(File, Dir, CSInfo, Source);
475 DIFileCache[FileName.data()].reset(F);
476 return F;
477}
478
479std::string CGDebugInfo::remapDIPath(StringRef Path) const {
480 if (DebugPrefixMap.empty())
481 return Path.str();
482
483 SmallString<256> P = Path;
484 for (const auto &Entry : DebugPrefixMap)
485 if (llvm::sys::path::replace_path_prefix(P, Entry.first, Entry.second))
486 break;
487 return P.str().str();
488}
489
490unsigned CGDebugInfo::getLineNumber(SourceLocation Loc) {
491 if (Loc.isInvalid())
492 return 0;
493 SourceManager &SM = CGM.getContext().getSourceManager();
494 return SM.getPresumedLoc(Loc).getLine();
495}
496
497unsigned CGDebugInfo::getColumnNumber(SourceLocation Loc, bool Force) {
498 // We may not want column information at all.
499 if (!Force && !CGM.getCodeGenOpts().DebugColumnInfo)
500 return 0;
501
502 // If the location is invalid then use the current column.
503 if (Loc.isInvalid() && CurLoc.isInvalid())
504 return 0;
505 SourceManager &SM = CGM.getContext().getSourceManager();
506 PresumedLoc PLoc = SM.getPresumedLoc(Loc.isValid() ? Loc : CurLoc);
507 return PLoc.isValid() ? PLoc.getColumn() : 0;
508}
509
510StringRef CGDebugInfo::getCurrentDirname() {
511 if (!CGM.getCodeGenOpts().DebugCompilationDir.empty())
512 return CGM.getCodeGenOpts().DebugCompilationDir;
513
514 if (!CWDName.empty())
515 return CWDName;
516 SmallString<256> CWD;
517 llvm::sys::fs::current_path(CWD);
518 return CWDName = internString(CWD);
519}
520
521void CGDebugInfo::CreateCompileUnit() {
522 SmallString<32> Checksum;
523 Optional<llvm::DIFile::ChecksumKind> CSKind;
524 Optional<llvm::DIFile::ChecksumInfo<StringRef>> CSInfo;
525
526 // Should we be asking the SourceManager for the main file name, instead of
527 // accepting it as an argument? This just causes the main file name to
528 // mismatch with source locations and create extra lexical scopes or
529 // mismatched debug info (a CU with a DW_AT_file of "-", because that's what
530 // the driver passed, but functions/other things have DW_AT_file of "<stdin>"
531 // because that's what the SourceManager says)
532
533 // Get absolute path name.
534 SourceManager &SM = CGM.getContext().getSourceManager();
535 std::string MainFileName = CGM.getCodeGenOpts().MainFileName;
536 if (MainFileName.empty())
537 MainFileName = "<stdin>";
538
539 // The main file name provided via the "-main-file-name" option contains just
540 // the file name itself with no path information. This file name may have had
541 // a relative path, so we look into the actual file entry for the main
542 // file to determine the real absolute path for the file.
543 std::string MainFileDir;
544 if (const FileEntry *MainFile = SM.getFileEntryForID(SM.getMainFileID())) {
545 MainFileDir = std::string(MainFile->getDir()->getName());
546 if (!llvm::sys::path::is_absolute(MainFileName)) {
547 llvm::SmallString<1024> MainFileDirSS(MainFileDir);
548 llvm::sys::path::append(MainFileDirSS, MainFileName);
549 MainFileName =
550 std::string(llvm::sys::path::remove_leading_dotslash(MainFileDirSS));
551 }
552 // If the main file name provided is identical to the input file name, and
553 // if the input file is a preprocessed source, use the module name for
554 // debug info. The module name comes from the name specified in the first
555 // linemarker if the input is a preprocessed source.
556 if (MainFile->getName() == MainFileName &&
557 FrontendOptions::getInputKindForExtension(
558 MainFile->getName().rsplit('.').second)
559 .isPreprocessed())
560 MainFileName = CGM.getModule().getName().str();
561
562 CSKind = computeChecksum(SM.getMainFileID(), Checksum);
563 }
564
565 llvm::dwarf::SourceLanguage LangTag;
566 const LangOptions &LO = CGM.getLangOpts();
567 if (LO.CPlusPlus) {
568 if (LO.ObjC)
569 LangTag = llvm::dwarf::DW_LANG_ObjC_plus_plus;
570 else if (LO.CPlusPlus14)
571 LangTag = llvm::dwarf::DW_LANG_C_plus_plus_14;
572 else if (LO.CPlusPlus11)
573 LangTag = llvm::dwarf::DW_LANG_C_plus_plus_11;
574 else
575 LangTag = llvm::dwarf::DW_LANG_C_plus_plus;
576 } else if (LO.ObjC) {
577 LangTag = llvm::dwarf::DW_LANG_ObjC;
578 } else if (LO.RenderScript) {
579 LangTag = llvm::dwarf::DW_LANG_GOOGLE_RenderScript;
580 } else if (LO.C99) {
581 LangTag = llvm::dwarf::DW_LANG_C99;
582 } else {
583 LangTag = llvm::dwarf::DW_LANG_C89;
584 }
585
586 std::string Producer = getClangFullVersion();
587
588 // Figure out which version of the ObjC runtime we have.
589 unsigned RuntimeVers = 0;
590 if (LO.ObjC)
591 RuntimeVers = LO.ObjCRuntime.isNonFragile() ? 2 : 1;
592
593 llvm::DICompileUnit::DebugEmissionKind EmissionKind;
594 switch (DebugKind) {
595 case codegenoptions::NoDebugInfo:
596 case codegenoptions::LocTrackingOnly:
597 EmissionKind = llvm::DICompileUnit::NoDebug;
598 break;
599 case codegenoptions::DebugLineTablesOnly:
600 EmissionKind = llvm::DICompileUnit::LineTablesOnly;
601 break;
602 case codegenoptions::DebugDirectivesOnly:
603 EmissionKind = llvm::DICompileUnit::DebugDirectivesOnly;
604 break;
605 case codegenoptions::DebugInfoConstructor:
606 case codegenoptions::LimitedDebugInfo:
607 case codegenoptions::FullDebugInfo:
608 case codegenoptions::UnusedTypeInfo:
609 EmissionKind = llvm::DICompileUnit::FullDebug;
610 break;
611 }
612
613 uint64_t DwoId = 0;
614 auto &CGOpts = CGM.getCodeGenOpts();
615 // The DIFile used by the CU is distinct from the main source
616 // file. Its directory part specifies what becomes the
617 // DW_AT_comp_dir (the compilation directory), even if the source
618 // file was specified with an absolute path.
619 if (CSKind)
620 CSInfo.emplace(*CSKind, Checksum);
621 llvm::DIFile *CUFile = DBuilder.createFile(
622 remapDIPath(MainFileName), remapDIPath(getCurrentDirname()), CSInfo,
623 getSource(SM, SM.getMainFileID()));
624
625 StringRef Sysroot, SDK;
626 if (CGM.getCodeGenOpts().getDebuggerTuning() == llvm::DebuggerKind::LLDB) {
627 Sysroot = CGM.getHeaderSearchOpts().Sysroot;
628 auto B = llvm::sys::path::rbegin(Sysroot);
629 auto E = llvm::sys::path::rend(Sysroot);
630 auto It = std::find_if(B, E, [](auto SDK) { return SDK.endswith(".sdk"); });
631 if (It != E)
632 SDK = *It;
633 }
634
635 // Create new compile unit.
636 TheCU = DBuilder.createCompileUnit(
637 LangTag, CUFile, CGOpts.EmitVersionIdentMetadata ? Producer : "",
638 LO.Optimize || CGOpts.PrepareForLTO || CGOpts.PrepareForThinLTO,
639 CGOpts.DwarfDebugFlags, RuntimeVers, CGOpts.SplitDwarfFile, EmissionKind,
640 DwoId, CGOpts.SplitDwarfInlining, CGOpts.DebugInfoForProfiling,
641 CGM.getTarget().getTriple().isNVPTX()
642 ? llvm::DICompileUnit::DebugNameTableKind::None
643 : static_cast<llvm::DICompileUnit::DebugNameTableKind>(
644 CGOpts.DebugNameTable),
645 CGOpts.DebugRangesBaseAddress, remapDIPath(Sysroot), SDK);
646}
647
648llvm::DIType *CGDebugInfo::CreateType(const BuiltinType *BT) {
649 llvm::dwarf::TypeKind Encoding;
650 StringRef BTName;
651 switch (BT->getKind()) {
652#define BUILTIN_TYPE(Id, SingletonId)
653#define PLACEHOLDER_TYPE(Id, SingletonId) case BuiltinType::Id:
654#include "clang/AST/BuiltinTypes.def"
655 case BuiltinType::Dependent:
656 llvm_unreachable("Unexpected builtin type")::llvm::llvm_unreachable_internal("Unexpected builtin type", "/build/llvm-toolchain-snapshot-13~++20210405022414+5f57793c4fe4/clang/lib/CodeGen/CGDebugInfo.cpp"
, 656)
;
657 case BuiltinType::NullPtr:
658 return DBuilder.createNullPtrType();
659 case BuiltinType::Void:
660 return nullptr;
661 case BuiltinType::ObjCClass:
662 if (!ClassTy)
663 ClassTy =
664 DBuilder.createForwardDecl(llvm::dwarf::DW_TAG_structure_type,
665 "objc_class", TheCU, TheCU->getFile(), 0);
666 return ClassTy;
667 case BuiltinType::ObjCId: {
668 // typedef struct objc_class *Class;
669 // typedef struct objc_object {
670 // Class isa;
671 // } *id;
672
673 if (ObjTy)
674 return ObjTy;
675
676 if (!ClassTy)
677 ClassTy =
678 DBuilder.createForwardDecl(llvm::dwarf::DW_TAG_structure_type,
679 "objc_class", TheCU, TheCU->getFile(), 0);
680
681 unsigned Size = CGM.getContext().getTypeSize(CGM.getContext().VoidPtrTy);
682
683 auto *ISATy = DBuilder.createPointerType(ClassTy, Size);
684
685 ObjTy = DBuilder.createStructType(TheCU, "objc_object", TheCU->getFile(), 0,
686 0, 0, llvm::DINode::FlagZero, nullptr,
687 llvm::DINodeArray());
688
689 DBuilder.replaceArrays(
690 ObjTy, DBuilder.getOrCreateArray(&*DBuilder.createMemberType(
691 ObjTy, "isa", TheCU->getFile(), 0, Size, 0, 0,
692 llvm::DINode::FlagZero, ISATy)));
693 return ObjTy;
694 }
695 case BuiltinType::ObjCSel: {
696 if (!SelTy)
697 SelTy = DBuilder.createForwardDecl(llvm::dwarf::DW_TAG_structure_type,
698 "objc_selector", TheCU,
699 TheCU->getFile(), 0);
700 return SelTy;
701 }
702
703#define IMAGE_TYPE(ImgType, Id, SingletonId, Access, Suffix) \
704 case BuiltinType::Id: \
705 return getOrCreateStructPtrType("opencl_" #ImgType "_" #Suffix "_t", \
706 SingletonId);
707#include "clang/Basic/OpenCLImageTypes.def"
708 case BuiltinType::OCLSampler:
709 return getOrCreateStructPtrType("opencl_sampler_t", OCLSamplerDITy);
710 case BuiltinType::OCLEvent:
711 return getOrCreateStructPtrType("opencl_event_t", OCLEventDITy);
712 case BuiltinType::OCLClkEvent:
713 return getOrCreateStructPtrType("opencl_clk_event_t", OCLClkEventDITy);
714 case BuiltinType::OCLQueue:
715 return getOrCreateStructPtrType("opencl_queue_t", OCLQueueDITy);
716 case BuiltinType::OCLReserveID:
717 return getOrCreateStructPtrType("opencl_reserve_id_t", OCLReserveIDDITy);
718#define EXT_OPAQUE_TYPE(ExtType, Id, Ext) \
719 case BuiltinType::Id: \
720 return getOrCreateStructPtrType("opencl_" #ExtType, Id##Ty);
721#include "clang/Basic/OpenCLExtensionTypes.def"
722
723#define SVE_TYPE(Name, Id, SingletonId) case BuiltinType::Id:
724#include "clang/Basic/AArch64SVEACLETypes.def"
725 {
726 ASTContext::BuiltinVectorTypeInfo Info =
727 CGM.getContext().getBuiltinVectorTypeInfo(BT);
728 unsigned NumElemsPerVG = (Info.EC.getKnownMinValue() * Info.NumVectors) / 2;
729
730 // Debuggers can't extract 1bit from a vector, so will display a
731 // bitpattern for svbool_t instead.
732 if (Info.ElementType == CGM.getContext().BoolTy) {
733 NumElemsPerVG /= 8;
734 Info.ElementType = CGM.getContext().UnsignedCharTy;
735 }
736
737 auto *LowerBound =
738 llvm::ConstantAsMetadata::get(llvm::ConstantInt::getSigned(
739 llvm::Type::getInt64Ty(CGM.getLLVMContext()), 0));
740 SmallVector<int64_t, 9> Expr(
741 {llvm::dwarf::DW_OP_constu, NumElemsPerVG, llvm::dwarf::DW_OP_bregx,
742 /* AArch64::VG */ 46, 0, llvm::dwarf::DW_OP_mul,
743 llvm::dwarf::DW_OP_constu, 1, llvm::dwarf::DW_OP_minus});
744 auto *UpperBound = DBuilder.createExpression(Expr);
745
746 llvm::Metadata *Subscript = DBuilder.getOrCreateSubrange(
747 /*count*/ nullptr, LowerBound, UpperBound, /*stride*/ nullptr);
748 llvm::DINodeArray SubscriptArray = DBuilder.getOrCreateArray(Subscript);
749 llvm::DIType *ElemTy =
750 getOrCreateType(Info.ElementType, TheCU->getFile());
751 auto Align = getTypeAlignIfRequired(BT, CGM.getContext());
752 return DBuilder.createVectorType(/*Size*/ 0, Align, ElemTy,
753 SubscriptArray);
754 }
755 // It doesn't make sense to generate debug info for PowerPC MMA vector types.
756 // So we return a safe type here to avoid generating an error.
757#define PPC_VECTOR_TYPE(Name, Id, size) \
758 case BuiltinType::Id:
759#include "clang/Basic/PPCTypes.def"
760 return CreateType(cast<const BuiltinType>(CGM.getContext().IntTy));
761
762#define RVV_TYPE(Name, Id, SingletonId) case BuiltinType::Id:
763#include "clang/Basic/RISCVVTypes.def"
764 {
765 ASTContext::BuiltinVectorTypeInfo Info =
766 CGM.getContext().getBuiltinVectorTypeInfo(BT);
767
768 unsigned ElementCount = Info.EC.getKnownMinValue();
769 unsigned SEW = CGM.getContext().getTypeSize(Info.ElementType);
770
771 bool Fractional = false;
772 unsigned LMUL;
773 unsigned FixedSize = ElementCount * SEW;
774 if (Info.ElementType == CGM.getContext().BoolTy) {
775 // Mask type only occupies one vector register.
776 LMUL = 1;
777 } else if (FixedSize < 64) {
778 // In RVV scalable vector types, we encode 64 bits in the fixed part.
779 Fractional = true;
780 LMUL = 64 / FixedSize;
781 } else {
782 LMUL = FixedSize / 64;
783 }
784
785 // Element count = (VLENB / SEW) x LMUL
786 SmallVector<int64_t, 9> Expr(
787 // The DW_OP_bregx operation has two operands: a register which is
788 // specified by an unsigned LEB128 number, followed by a signed LEB128
789 // offset.
790 {llvm::dwarf::DW_OP_bregx, // Read the contents of a register.
791 4096 + 0xC22, // RISC-V VLENB CSR register.
792 0, // Offset for DW_OP_bregx. It is dummy here.
793 llvm::dwarf::DW_OP_constu,
794 SEW / 8, // SEW is in bits.
795 llvm::dwarf::DW_OP_div, llvm::dwarf::DW_OP_constu, LMUL});
796 if (Fractional)
797 Expr.push_back(llvm::dwarf::DW_OP_div);
798 else
799 Expr.push_back(llvm::dwarf::DW_OP_mul);
800
801 auto *LowerBound =
802 llvm::ConstantAsMetadata::get(llvm::ConstantInt::getSigned(
803 llvm::Type::getInt64Ty(CGM.getLLVMContext()), 0));
804 auto *UpperBound = DBuilder.createExpression(Expr);
805 llvm::Metadata *Subscript = DBuilder.getOrCreateSubrange(
806 /*count*/ nullptr, LowerBound, UpperBound, /*stride*/ nullptr);
807 llvm::DINodeArray SubscriptArray = DBuilder.getOrCreateArray(Subscript);
808 llvm::DIType *ElemTy =
809 getOrCreateType(Info.ElementType, TheCU->getFile());
810
811 auto Align = getTypeAlignIfRequired(BT, CGM.getContext());
812 return DBuilder.createVectorType(/*Size=*/0, Align, ElemTy,
813 SubscriptArray);
814 }
815 case BuiltinType::UChar:
816 case BuiltinType::Char_U:
817 Encoding = llvm::dwarf::DW_ATE_unsigned_char;
818 break;
819 case BuiltinType::Char_S:
820 case BuiltinType::SChar:
821 Encoding = llvm::dwarf::DW_ATE_signed_char;
822 break;
823 case BuiltinType::Char8:
824 case BuiltinType::Char16:
825 case BuiltinType::Char32:
826 Encoding = llvm::dwarf::DW_ATE_UTF;
827 break;
828 case BuiltinType::UShort:
829 case BuiltinType::UInt:
830 case BuiltinType::UInt128:
831 case BuiltinType::ULong:
832 case BuiltinType::WChar_U:
833 case BuiltinType::ULongLong:
834 Encoding = llvm::dwarf::DW_ATE_unsigned;
835 break;
836 case BuiltinType::Short:
837 case BuiltinType::Int:
838 case BuiltinType::Int128:
839 case BuiltinType::Long:
840 case BuiltinType::WChar_S:
841 case BuiltinType::LongLong:
842 Encoding = llvm::dwarf::DW_ATE_signed;
843 break;
844 case BuiltinType::Bool:
845 Encoding = llvm::dwarf::DW_ATE_boolean;
846 break;
847 case BuiltinType::Half:
848 case BuiltinType::Float:
849 case BuiltinType::LongDouble:
850 case BuiltinType::Float16:
851 case BuiltinType::BFloat16:
852 case BuiltinType::Float128:
853 case BuiltinType::Double:
854 // FIXME: For targets where long double and __float128 have the same size,
855 // they are currently indistinguishable in the debugger without some
856 // special treatment. However, there is currently no consensus on encoding
857 // and this should be updated once a DWARF encoding exists for distinct
858 // floating point types of the same size.
859 Encoding = llvm::dwarf::DW_ATE_float;
860 break;
861 case BuiltinType::ShortAccum:
862 case BuiltinType::Accum:
863 case BuiltinType::LongAccum:
864 case BuiltinType::ShortFract:
865 case BuiltinType::Fract:
866 case BuiltinType::LongFract:
867 case BuiltinType::SatShortFract:
868 case BuiltinType::SatFract:
869 case BuiltinType::SatLongFract:
870 case BuiltinType::SatShortAccum:
871 case BuiltinType::SatAccum:
872 case BuiltinType::SatLongAccum:
873 Encoding = llvm::dwarf::DW_ATE_signed_fixed;
874 break;
875 case BuiltinType::UShortAccum:
876 case BuiltinType::UAccum:
877 case BuiltinType::ULongAccum:
878 case BuiltinType::UShortFract:
879 case BuiltinType::UFract:
880 case BuiltinType::ULongFract:
881 case BuiltinType::SatUShortAccum:
882 case BuiltinType::SatUAccum:
883 case BuiltinType::SatULongAccum:
884 case BuiltinType::SatUShortFract:
885 case BuiltinType::SatUFract:
886 case BuiltinType::SatULongFract:
887 Encoding = llvm::dwarf::DW_ATE_unsigned_fixed;
888 break;
889 }
890
891 switch (BT->getKind()) {
892 case BuiltinType::Long:
893 BTName = "long int";
894 break;
895 case BuiltinType::LongLong:
896 BTName = "long long int";
897 break;
898 case BuiltinType::ULong:
899 BTName = "long unsigned int";
900 break;
901 case BuiltinType::ULongLong:
902 BTName = "long long unsigned int";
903 break;
904 default:
905 BTName = BT->getName(CGM.getLangOpts());
906 break;
907 }
908 // Bit size and offset of the type.
909 uint64_t Size = CGM.getContext().getTypeSize(BT);
910 return DBuilder.createBasicType(BTName, Size, Encoding);
911}
912
913llvm::DIType *CGDebugInfo::CreateType(const AutoType *Ty) {
914 return DBuilder.createUnspecifiedType("auto");
915}
916
917llvm::DIType *CGDebugInfo::CreateType(const ExtIntType *Ty) {
918
919 StringRef Name = Ty->isUnsigned() ? "unsigned _ExtInt" : "_ExtInt";
920 llvm::dwarf::TypeKind Encoding = Ty->isUnsigned()
921 ? llvm::dwarf::DW_ATE_unsigned
922 : llvm::dwarf::DW_ATE_signed;
923
924 return DBuilder.createBasicType(Name, CGM.getContext().getTypeSize(Ty),
925 Encoding);
926}
927
928llvm::DIType *CGDebugInfo::CreateType(const ComplexType *Ty) {
929 // Bit size and offset of the type.
930 llvm::dwarf::TypeKind Encoding = llvm::dwarf::DW_ATE_complex_float;
931 if (Ty->isComplexIntegerType())
932 Encoding = llvm::dwarf::DW_ATE_lo_user;
933
934 uint64_t Size = CGM.getContext().getTypeSize(Ty);
935 return DBuilder.createBasicType("complex", Size, Encoding);
936}
937
938llvm::DIType *CGDebugInfo::CreateQualifiedType(QualType Ty,
939 llvm::DIFile *Unit) {
940 QualifierCollector Qc;
941 const Type *T = Qc.strip(Ty);
942
943 // Ignore these qualifiers for now.
944 Qc.removeObjCGCAttr();
945 Qc.removeAddressSpace();
946 Qc.removeObjCLifetime();
947
948 // We will create one Derived type for one qualifier and recurse to handle any
949 // additional ones.
950 llvm::dwarf::Tag Tag;
951 if (Qc.hasConst()) {
952 Tag = llvm::dwarf::DW_TAG_const_type;
953 Qc.removeConst();
954 } else if (Qc.hasVolatile()) {
955 Tag = llvm::dwarf::DW_TAG_volatile_type;
956 Qc.removeVolatile();
957 } else if (Qc.hasRestrict()) {
958 Tag = llvm::dwarf::DW_TAG_restrict_type;
959 Qc.removeRestrict();
960 } else {
961 assert(Qc.empty() && "Unknown type qualifier for debug info")((Qc.empty() && "Unknown type qualifier for debug info"
) ? static_cast<void> (0) : __assert_fail ("Qc.empty() && \"Unknown type qualifier for debug info\""
, "/build/llvm-toolchain-snapshot-13~++20210405022414+5f57793c4fe4/clang/lib/CodeGen/CGDebugInfo.cpp"
, 961, __PRETTY_FUNCTION__))
;
962 return getOrCreateType(QualType(T, 0), Unit);
963 }
964
965 auto *FromTy = getOrCreateType(Qc.apply(CGM.getContext(), T), Unit);
966
967 // No need to fill in the Name, Line, Size, Alignment, Offset in case of
968 // CVR derived types.
969 return DBuilder.createQualifiedType(Tag, FromTy);
970}
971
972llvm::DIType *CGDebugInfo::CreateType(const ObjCObjectPointerType *Ty,
973 llvm::DIFile *Unit) {
974
975 // The frontend treats 'id' as a typedef to an ObjCObjectType,
976 // whereas 'id<protocol>' is treated as an ObjCPointerType. For the
977 // debug info, we want to emit 'id' in both cases.
978 if (Ty->isObjCQualifiedIdType())
979 return getOrCreateType(CGM.getContext().getObjCIdType(), Unit);
980
981 return CreatePointerLikeType(llvm::dwarf::DW_TAG_pointer_type, Ty,
982 Ty->getPointeeType(), Unit);
983}
984
985llvm::DIType *CGDebugInfo::CreateType(const PointerType *Ty,
986 llvm::DIFile *Unit) {
987 return CreatePointerLikeType(llvm::dwarf::DW_TAG_pointer_type, Ty,
988 Ty->getPointeeType(), Unit);
989}
990
991/// \return whether a C++ mangling exists for the type defined by TD.
992static bool hasCXXMangling(const TagDecl *TD, llvm::DICompileUnit *TheCU) {
993 switch (TheCU->getSourceLanguage()) {
994 case llvm::dwarf::DW_LANG_C_plus_plus:
995 case llvm::dwarf::DW_LANG_C_plus_plus_11:
996 case llvm::dwarf::DW_LANG_C_plus_plus_14:
997 return true;
998 case llvm::dwarf::DW_LANG_ObjC_plus_plus:
999 return isa<CXXRecordDecl>(TD) || isa<EnumDecl>(TD);
1000 default:
1001 return false;
1002 }
1003}
1004
1005// Determines if the debug info for this tag declaration needs a type
1006// identifier. The purpose of the unique identifier is to deduplicate type
1007// information for identical types across TUs. Because of the C++ one definition
1008// rule (ODR), it is valid to assume that the type is defined the same way in
1009// every TU and its debug info is equivalent.
1010//
1011// C does not have the ODR, and it is common for codebases to contain multiple
1012// different definitions of a struct with the same name in different TUs.
1013// Therefore, if the type doesn't have a C++ mangling, don't give it an
1014// identifer. Type information in C is smaller and simpler than C++ type
1015// information, so the increase in debug info size is negligible.
1016//
1017// If the type is not externally visible, it should be unique to the current TU,
1018// and should not need an identifier to participate in type deduplication.
1019// However, when emitting CodeView, the format internally uses these
1020// unique type name identifers for references between debug info. For example,
1021// the method of a class in an anonymous namespace uses the identifer to refer
1022// to its parent class. The Microsoft C++ ABI attempts to provide unique names
1023// for such types, so when emitting CodeView, always use identifiers for C++
1024// types. This may create problems when attempting to emit CodeView when the MS
1025// C++ ABI is not in use.
1026static bool needsTypeIdentifier(const TagDecl *TD, CodeGenModule &CGM,
1027 llvm::DICompileUnit *TheCU) {
1028 // We only add a type identifier for types with C++ name mangling.
1029 if (!hasCXXMangling(TD, TheCU))
1030 return false;
1031
1032 // Externally visible types with C++ mangling need a type identifier.
1033 if (TD->isExternallyVisible())
1034 return true;
1035
1036 // CodeView types with C++ mangling need a type identifier.
1037 if (CGM.getCodeGenOpts().EmitCodeView)
1038 return true;
1039
1040 return false;
1041}
1042
1043// Returns a unique type identifier string if one exists, or an empty string.
1044static SmallString<256> getTypeIdentifier(const TagType *Ty, CodeGenModule &CGM,
1045 llvm::DICompileUnit *TheCU) {
1046 SmallString<256> Identifier;
1047 const TagDecl *TD = Ty->getDecl();
1048
1049 if (!needsTypeIdentifier(TD, CGM, TheCU))
1050 return Identifier;
1051 if (const auto *RD = dyn_cast<CXXRecordDecl>(TD))
1052 if (RD->getDefinition())
1053 if (RD->isDynamicClass() &&
1054 CGM.getVTableLinkage(RD) == llvm::GlobalValue::ExternalLinkage)
1055 return Identifier;
1056
1057 // TODO: This is using the RTTI name. Is there a better way to get
1058 // a unique string for a type?
1059 llvm::raw_svector_ostream Out(Identifier);
1060 CGM.getCXXABI().getMangleContext().mangleCXXRTTIName(QualType(Ty, 0), Out);
1061 return Identifier;
1062}
1063
1064/// \return the appropriate DWARF tag for a composite type.
1065static llvm::dwarf::Tag getTagForRecord(const RecordDecl *RD) {
1066 llvm::dwarf::Tag Tag;
1067 if (RD->isStruct() || RD->isInterface())
1068 Tag = llvm::dwarf::DW_TAG_structure_type;
1069 else if (RD->isUnion())
1070 Tag = llvm::dwarf::DW_TAG_union_type;
1071 else {
1072 // FIXME: This could be a struct type giving a default visibility different
1073 // than C++ class type, but needs llvm metadata changes first.
1074 assert(RD->isClass())((RD->isClass()) ? static_cast<void> (0) : __assert_fail
("RD->isClass()", "/build/llvm-toolchain-snapshot-13~++20210405022414+5f57793c4fe4/clang/lib/CodeGen/CGDebugInfo.cpp"
, 1074, __PRETTY_FUNCTION__))
;
1075 Tag = llvm::dwarf::DW_TAG_class_type;
1076 }
1077 return Tag;
1078}
1079
1080llvm::DICompositeType *
1081CGDebugInfo::getOrCreateRecordFwdDecl(const RecordType *Ty,
1082 llvm::DIScope *Ctx) {
1083 const RecordDecl *RD = Ty->getDecl();
1084 if (llvm::DIType *T = getTypeOrNull(CGM.getContext().getRecordType(RD)))
1085 return cast<llvm::DICompositeType>(T);
1086 llvm::DIFile *DefUnit = getOrCreateFile(RD->getLocation());
1087 const unsigned Line =
1088 getLineNumber(RD->getLocation().isValid() ? RD->getLocation() : CurLoc);
1089 StringRef RDName = getClassName(RD);
1090
1091 uint64_t Size = 0;
1092 uint32_t Align = 0;
1093
1094 const RecordDecl *D = RD->getDefinition();
1095 if (D && D->isCompleteDefinition())
1096 Size = CGM.getContext().getTypeSize(Ty);
1097
1098 llvm::DINode::DIFlags Flags = llvm::DINode::FlagFwdDecl;
1099
1100 // Add flag to nontrivial forward declarations. To be consistent with MSVC,
1101 // add the flag if a record has no definition because we don't know whether
1102 // it will be trivial or not.
1103 if (const CXXRecordDecl *CXXRD = dyn_cast<CXXRecordDecl>(RD))
1104 if (!CXXRD->hasDefinition() ||
1105 (CXXRD->hasDefinition() && !CXXRD->isTrivial()))
1106 Flags |= llvm::DINode::FlagNonTrivial;
1107
1108 // Create the type.
1109 SmallString<256> Identifier;
1110 // Don't include a linkage name in line tables only.
1111 if (CGM.getCodeGenOpts().hasReducedDebugInfo())
1112 Identifier = getTypeIdentifier(Ty, CGM, TheCU);
1113 llvm::DICompositeType *RetTy = DBuilder.createReplaceableCompositeType(
1114 getTagForRecord(RD), RDName, Ctx, DefUnit, Line, 0, Size, Align, Flags,
1115 Identifier);
1116 if (CGM.getCodeGenOpts().DebugFwdTemplateParams)
1117 if (auto *TSpecial = dyn_cast<ClassTemplateSpecializationDecl>(RD))
1118 DBuilder.replaceArrays(RetTy, llvm::DINodeArray(),
1119 CollectCXXTemplateParams(TSpecial, DefUnit));
1120 ReplaceMap.emplace_back(
1121 std::piecewise_construct, std::make_tuple(Ty),
1122 std::make_tuple(static_cast<llvm::Metadata *>(RetTy)));
1123 return RetTy;
1124}
1125
1126llvm::DIType *CGDebugInfo::CreatePointerLikeType(llvm::dwarf::Tag Tag,
1127 const Type *Ty,
1128 QualType PointeeTy,
1129 llvm::DIFile *Unit) {
1130 // Bit size, align and offset of the type.
1131 // Size is always the size of a pointer. We can't use getTypeSize here
1132 // because that does not return the correct value for references.
1133 unsigned AddressSpace = CGM.getContext().getTargetAddressSpace(PointeeTy);
1134 uint64_t Size = CGM.getTarget().getPointerWidth(AddressSpace);
1135 auto Align = getTypeAlignIfRequired(Ty, CGM.getContext());
1136 Optional<unsigned> DWARFAddressSpace =
1137 CGM.getTarget().getDWARFAddressSpace(AddressSpace);
1138
1139 if (Tag == llvm::dwarf::DW_TAG_reference_type ||
1140 Tag == llvm::dwarf::DW_TAG_rvalue_reference_type)
1141 return DBuilder.createReferenceType(Tag, getOrCreateType(PointeeTy, Unit),
1142 Size, Align, DWARFAddressSpace);
1143 else
1144 return DBuilder.createPointerType(getOrCreateType(PointeeTy, Unit), Size,
1145 Align, DWARFAddressSpace);
1146}
1147
1148llvm::DIType *CGDebugInfo::getOrCreateStructPtrType(StringRef Name,
1149 llvm::DIType *&Cache) {
1150 if (Cache)
1151 return Cache;
1152 Cache = DBuilder.createForwardDecl(llvm::dwarf::DW_TAG_structure_type, Name,
1153 TheCU, TheCU->getFile(), 0);
1154 unsigned Size = CGM.getContext().getTypeSize(CGM.getContext().VoidPtrTy);
1155 Cache = DBuilder.createPointerType(Cache, Size);
1156 return Cache;
1157}
1158
1159uint64_t CGDebugInfo::collectDefaultElementTypesForBlockPointer(
1160 const BlockPointerType *Ty, llvm::DIFile *Unit, llvm::DIDerivedType *DescTy,
1161 unsigned LineNo, SmallVectorImpl<llvm::Metadata *> &EltTys) {
1162 QualType FType;
1163
1164 // Advanced by calls to CreateMemberType in increments of FType, then
1165 // returned as the overall size of the default elements.
1166 uint64_t FieldOffset = 0;
1167
1168 // Blocks in OpenCL have unique constraints which make the standard fields
1169 // redundant while requiring size and align fields for enqueue_kernel. See
1170 // initializeForBlockHeader in CGBlocks.cpp
1171 if (CGM.getLangOpts().OpenCL) {
1172 FType = CGM.getContext().IntTy;
1173 EltTys.push_back(CreateMemberType(Unit, FType, "__size", &FieldOffset));
1174 EltTys.push_back(CreateMemberType(Unit, FType, "__align", &FieldOffset));
1175 } else {
1176 FType = CGM.getContext().getPointerType(CGM.getContext().VoidTy);
1177 EltTys.push_back(CreateMemberType(Unit, FType, "__isa", &FieldOffset));
1178 FType = CGM.getContext().IntTy;
1179 EltTys.push_back(CreateMemberType(Unit, FType, "__flags", &FieldOffset));
1180 EltTys.push_back(CreateMemberType(Unit, FType, "__reserved", &FieldOffset));
1181 FType = CGM.getContext().getPointerType(Ty->getPointeeType());
1182 EltTys.push_back(CreateMemberType(Unit, FType, "__FuncPtr", &FieldOffset));
1183 FType = CGM.getContext().getPointerType(CGM.getContext().VoidTy);
1184 uint64_t FieldSize = CGM.getContext().getTypeSize(Ty);
1185 uint32_t FieldAlign = CGM.getContext().getTypeAlign(Ty);
1186 EltTys.push_back(DBuilder.createMemberType(
1187 Unit, "__descriptor", nullptr, LineNo, FieldSize, FieldAlign,
1188 FieldOffset, llvm::DINode::FlagZero, DescTy));
1189 FieldOffset += FieldSize;
1190 }
1191
1192 return FieldOffset;
1193}
1194
1195llvm::DIType *CGDebugInfo::CreateType(const BlockPointerType *Ty,
1196 llvm::DIFile *Unit) {
1197 SmallVector<llvm::Metadata *, 8> EltTys;
1198 QualType FType;
1199 uint64_t FieldOffset;
1200 llvm::DINodeArray Elements;
1201
1202 FieldOffset = 0;
1203 FType = CGM.getContext().UnsignedLongTy;
1204 EltTys.push_back(CreateMemberType(Unit, FType, "reserved", &FieldOffset));
1205 EltTys.push_back(CreateMemberType(Unit, FType, "Size", &FieldOffset));
1206
1207 Elements = DBuilder.getOrCreateArray(EltTys);
1208 EltTys.clear();
1209
1210 llvm::DINode::DIFlags Flags = llvm::DINode::FlagAppleBlock;
1211
1212 auto *EltTy =
1213 DBuilder.createStructType(Unit, "__block_descriptor", nullptr, 0,
1214 FieldOffset, 0, Flags, nullptr, Elements);
1215
1216 // Bit size, align and offset of the type.
1217 uint64_t Size = CGM.getContext().getTypeSize(Ty);
1218
1219 auto *DescTy = DBuilder.createPointerType(EltTy, Size);
1220
1221 FieldOffset = collectDefaultElementTypesForBlockPointer(Ty, Unit, DescTy,
1222 0, EltTys);
1223
1224 Elements = DBuilder.getOrCreateArray(EltTys);
1225
1226 // The __block_literal_generic structs are marked with a special
1227 // DW_AT_APPLE_BLOCK attribute and are an implementation detail only
1228 // the debugger needs to know about. To allow type uniquing, emit
1229 // them without a name or a location.
1230 EltTy = DBuilder.createStructType(Unit, "", nullptr, 0, FieldOffset, 0,
1231 Flags, nullptr, Elements);
1232
1233 return DBuilder.createPointerType(EltTy, Size);
1234}
1235
1236llvm::DIType *CGDebugInfo::CreateType(const TemplateSpecializationType *Ty,
1237 llvm::DIFile *Unit) {
1238 assert(Ty->isTypeAlias())((Ty->isTypeAlias()) ? static_cast<void> (0) : __assert_fail
("Ty->isTypeAlias()", "/build/llvm-toolchain-snapshot-13~++20210405022414+5f57793c4fe4/clang/lib/CodeGen/CGDebugInfo.cpp"
, 1238, __PRETTY_FUNCTION__))
;
1239 llvm::DIType *Src = getOrCreateType(Ty->getAliasedType(), Unit);
1240
1241 auto *AliasDecl =
1242 cast<TypeAliasTemplateDecl>(Ty->getTemplateName().getAsTemplateDecl())
1243 ->getTemplatedDecl();
1244
1245 if (AliasDecl->hasAttr<NoDebugAttr>())
1246 return Src;
1247
1248 SmallString<128> NS;
1249 llvm::raw_svector_ostream OS(NS);
1250 Ty->getTemplateName().print(OS, getPrintingPolicy(), /*qualified*/ false);
1251 printTemplateArgumentList(OS, Ty->template_arguments(), getPrintingPolicy());
1252
1253 SourceLocation Loc = AliasDecl->getLocation();
1254 return DBuilder.createTypedef(Src, OS.str(), getOrCreateFile(Loc),
1255 getLineNumber(Loc),
1256 getDeclContextDescriptor(AliasDecl));
1257}
1258
1259llvm::DIType *CGDebugInfo::CreateType(const TypedefType *Ty,
1260 llvm::DIFile *Unit) {
1261 llvm::DIType *Underlying =
1262 getOrCreateType(Ty->getDecl()->getUnderlyingType(), Unit);
1263
1264 if (Ty->getDecl()->hasAttr<NoDebugAttr>())
1265 return Underlying;
1266
1267 // We don't set size information, but do specify where the typedef was
1268 // declared.
1269 SourceLocation Loc = Ty->getDecl()->getLocation();
1270
1271 uint32_t Align = getDeclAlignIfRequired(Ty->getDecl(), CGM.getContext());
1272 // Typedefs are derived from some other type.
1273 return DBuilder.createTypedef(Underlying, Ty->getDecl()->getName(),
1274 getOrCreateFile(Loc), getLineNumber(Loc),
1275 getDeclContextDescriptor(Ty->getDecl()), Align);
1276}
1277
1278static unsigned getDwarfCC(CallingConv CC) {
1279 switch (CC) {
1280 case CC_C:
1281 // Avoid emitting DW_AT_calling_convention if the C convention was used.
1282 return 0;
1283
1284 case CC_X86StdCall:
1285 return llvm::dwarf::DW_CC_BORLAND_stdcall;
1286 case CC_X86FastCall:
1287 return llvm::dwarf::DW_CC_BORLAND_msfastcall;
1288 case CC_X86ThisCall:
1289 return llvm::dwarf::DW_CC_BORLAND_thiscall;
1290 case CC_X86VectorCall:
1291 return llvm::dwarf::DW_CC_LLVM_vectorcall;
1292 case CC_X86Pascal:
1293 return llvm::dwarf::DW_CC_BORLAND_pascal;
1294 case CC_Win64:
1295 return llvm::dwarf::DW_CC_LLVM_Win64;
1296 case CC_X86_64SysV:
1297 return llvm::dwarf::DW_CC_LLVM_X86_64SysV;
1298 case CC_AAPCS:
1299 case CC_AArch64VectorCall:
1300 return llvm::dwarf::DW_CC_LLVM_AAPCS;
1301 case CC_AAPCS_VFP:
1302 return llvm::dwarf::DW_CC_LLVM_AAPCS_VFP;
1303 case CC_IntelOclBicc:
1304 return llvm::dwarf::DW_CC_LLVM_IntelOclBicc;
1305 case CC_SpirFunction:
1306 return llvm::dwarf::DW_CC_LLVM_SpirFunction;
1307 case CC_OpenCLKernel:
1308 return llvm::dwarf::DW_CC_LLVM_OpenCLKernel;
1309 case CC_Swift:
1310 return llvm::dwarf::DW_CC_LLVM_Swift;
1311 case CC_PreserveMost:
1312 return llvm::dwarf::DW_CC_LLVM_PreserveMost;
1313 case CC_PreserveAll:
1314 return llvm::dwarf::DW_CC_LLVM_PreserveAll;
1315 case CC_X86RegCall:
1316 return llvm::dwarf::DW_CC_LLVM_X86RegCall;
1317 }
1318 return 0;
1319}
1320
1321llvm::DIType *CGDebugInfo::CreateType(const FunctionType *Ty,
1322 llvm::DIFile *Unit) {
1323 SmallVector<llvm::Metadata *, 16> EltTys;
1324
1325 // Add the result type at least.
1326 EltTys.push_back(getOrCreateType(Ty->getReturnType(), Unit));
1327
1328 // Set up remainder of arguments if there is a prototype.
1329 // otherwise emit it as a variadic function.
1330 if (isa<FunctionNoProtoType>(Ty))
1331 EltTys.push_back(DBuilder.createUnspecifiedParameter());
1332 else if (const auto *FPT = dyn_cast<FunctionProtoType>(Ty)) {
1333 for (const QualType &ParamType : FPT->param_types())
1334 EltTys.push_back(getOrCreateType(ParamType, Unit));
1335 if (FPT->isVariadic())
1336 EltTys.push_back(DBuilder.createUnspecifiedParameter());
1337 }
1338
1339 llvm::DITypeRefArray EltTypeArray = DBuilder.getOrCreateTypeArray(EltTys);
1340 return DBuilder.createSubroutineType(EltTypeArray, llvm::DINode::FlagZero,
1341 getDwarfCC(Ty->getCallConv()));
1342}
1343
1344/// Convert an AccessSpecifier into the corresponding DINode flag.
1345/// As an optimization, return 0 if the access specifier equals the
1346/// default for the containing type.
1347static llvm::DINode::DIFlags getAccessFlag(AccessSpecifier Access,
1348 const RecordDecl *RD) {
1349 AccessSpecifier Default = clang::AS_none;
1350 if (RD && RD->isClass())
1351 Default = clang::AS_private;
1352 else if (RD && (RD->isStruct() || RD->isUnion()))
1353 Default = clang::AS_public;
1354
1355 if (Access == Default)
1356 return llvm::DINode::FlagZero;
1357
1358 switch (Access) {
1359 case clang::AS_private:
1360 return llvm::DINode::FlagPrivate;
1361 case clang::AS_protected:
1362 return llvm::DINode::FlagProtected;
1363 case clang::AS_public:
1364 return llvm::DINode::FlagPublic;
1365 case clang::AS_none:
1366 return llvm::DINode::FlagZero;
1367 }
1368 llvm_unreachable("unexpected access enumerator")::llvm::llvm_unreachable_internal("unexpected access enumerator"
, "/build/llvm-toolchain-snapshot-13~++20210405022414+5f57793c4fe4/clang/lib/CodeGen/CGDebugInfo.cpp"
, 1368)
;
1369}
1370
1371llvm::DIType *CGDebugInfo::createBitFieldType(const FieldDecl *BitFieldDecl,
1372 llvm::DIScope *RecordTy,
1373 const RecordDecl *RD) {
1374 StringRef Name = BitFieldDecl->getName();
1375 QualType Ty = BitFieldDecl->getType();
1376 SourceLocation Loc = BitFieldDecl->getLocation();
1377 llvm::DIFile *VUnit = getOrCreateFile(Loc);
1378 llvm::DIType *DebugType = getOrCreateType(Ty, VUnit);
1379
1380 // Get the location for the field.
1381 llvm::DIFile *File = getOrCreateFile(Loc);
1382 unsigned Line = getLineNumber(Loc);
1383
1384 const CGBitFieldInfo &BitFieldInfo =
1385 CGM.getTypes().getCGRecordLayout(RD).getBitFieldInfo(BitFieldDecl);
1386 uint64_t SizeInBits = BitFieldInfo.Size;
1387 assert(SizeInBits > 0 && "found named 0-width bitfield")((SizeInBits > 0 && "found named 0-width bitfield"
) ? static_cast<void> (0) : __assert_fail ("SizeInBits > 0 && \"found named 0-width bitfield\""
, "/build/llvm-toolchain-snapshot-13~++20210405022414+5f57793c4fe4/clang/lib/CodeGen/CGDebugInfo.cpp"
, 1387, __PRETTY_FUNCTION__))
;
1388 uint64_t StorageOffsetInBits =
1389 CGM.getContext().toBits(BitFieldInfo.StorageOffset);
1390 uint64_t Offset = BitFieldInfo.Offset;
1391 // The bit offsets for big endian machines are reversed for big
1392 // endian target, compensate for that as the DIDerivedType requires
1393 // un-reversed offsets.
1394 if (CGM.getDataLayout().isBigEndian())
1395 Offset = BitFieldInfo.StorageSize - BitFieldInfo.Size - Offset;
1396 uint64_t OffsetInBits = StorageOffsetInBits + Offset;
1397 llvm::DINode::DIFlags Flags = getAccessFlag(BitFieldDecl->getAccess(), RD);
1398 return DBuilder.createBitFieldMemberType(
1399 RecordTy, Name, File, Line, SizeInBits, OffsetInBits, StorageOffsetInBits,
1400 Flags, DebugType);
1401}
1402
1403llvm::DIType *
1404CGDebugInfo::createFieldType(StringRef name, QualType type, SourceLocation loc,
1405 AccessSpecifier AS, uint64_t offsetInBits,
1406 uint32_t AlignInBits, llvm::DIFile *tunit,
1407 llvm::DIScope *scope, const RecordDecl *RD) {
1408 llvm::DIType *debugType = getOrCreateType(type, tunit);
1409
1410 // Get the location for the field.
1411 llvm::DIFile *file = getOrCreateFile(loc);
1412 const unsigned line = getLineNumber(loc.isValid() ? loc : CurLoc);
1413
1414 uint64_t SizeInBits = 0;
1415 auto Align = AlignInBits;
1416 if (!type->isIncompleteArrayType()) {
1417 TypeInfo TI = CGM.getContext().getTypeInfo(type);
1418 SizeInBits = TI.Width;
1419 if (!Align)
1420 Align = getTypeAlignIfRequired(type, CGM.getContext());
1421 }
1422
1423 llvm::DINode::DIFlags flags = getAccessFlag(AS, RD);
1424 return DBuilder.createMemberType(scope, name, file, line, SizeInBits, Align,
1425 offsetInBits, flags, debugType);
1426}
1427
1428void CGDebugInfo::CollectRecordLambdaFields(
1429 const CXXRecordDecl *CXXDecl, SmallVectorImpl<llvm::Metadata *> &elements,
1430 llvm::DIType *RecordTy) {
1431 // For C++11 Lambdas a Field will be the same as a Capture, but the Capture
1432 // has the name and the location of the variable so we should iterate over
1433 // both concurrently.
1434 const ASTRecordLayout &layout = CGM.getContext().getASTRecordLayout(CXXDecl);
1435 RecordDecl::field_iterator Field = CXXDecl->field_begin();
1436 unsigned fieldno = 0;
1437 for (CXXRecordDecl::capture_const_iterator I = CXXDecl->captures_begin(),
1438 E = CXXDecl->captures_end();
1439 I != E; ++I, ++Field, ++fieldno) {
1440 const LambdaCapture &C = *I;
1441 if (C.capturesVariable()) {
1442 SourceLocation Loc = C.getLocation();
1443 assert(!Field->isBitField() && "lambdas don't have bitfield members!")((!Field->isBitField() && "lambdas don't have bitfield members!"
) ? static_cast<void> (0) : __assert_fail ("!Field->isBitField() && \"lambdas don't have bitfield members!\""
, "/build/llvm-toolchain-snapshot-13~++20210405022414+5f57793c4fe4/clang/lib/CodeGen/CGDebugInfo.cpp"
, 1443, __PRETTY_FUNCTION__))
;
1444 VarDecl *V = C.getCapturedVar();
1445 StringRef VName = V->getName();
1446 llvm::DIFile *VUnit = getOrCreateFile(Loc);
1447 auto Align = getDeclAlignIfRequired(V, CGM.getContext());
1448 llvm::DIType *FieldType = createFieldType(
1449 VName, Field->getType(), Loc, Field->getAccess(),
1450 layout.getFieldOffset(fieldno), Align, VUnit, RecordTy, CXXDecl);
1451 elements.push_back(FieldType);
1452 } else if (C.capturesThis()) {
1453 // TODO: Need to handle 'this' in some way by probably renaming the
1454 // this of the lambda class and having a field member of 'this' or
1455 // by using AT_object_pointer for the function and having that be
1456 // used as 'this' for semantic references.
1457 FieldDecl *f = *Field;
1458 llvm::DIFile *VUnit = getOrCreateFile(f->getLocation());
1459 QualType type = f->getType();
1460 llvm::DIType *fieldType = createFieldType(
1461 "this", type, f->getLocation(), f->getAccess(),
1462 layout.getFieldOffset(fieldno), VUnit, RecordTy, CXXDecl);
1463
1464 elements.push_back(fieldType);
1465 }
1466 }
1467}
1468
1469llvm::DIDerivedType *
1470CGDebugInfo::CreateRecordStaticField(const VarDecl *Var, llvm::DIType *RecordTy,
1471 const RecordDecl *RD) {
1472 // Create the descriptor for the static variable, with or without
1473 // constant initializers.
1474 Var = Var->getCanonicalDecl();
1475 llvm::DIFile *VUnit = getOrCreateFile(Var->getLocation());
1476 llvm::DIType *VTy = getOrCreateType(Var->getType(), VUnit);
1477
1478 unsigned LineNumber = getLineNumber(Var->getLocation());
1479 StringRef VName = Var->getName();
1480 llvm::Constant *C = nullptr;
1481 if (Var->getInit()) {
1482 const APValue *Value = Var->evaluateValue();
1483 if (Value) {
1484 if (Value->isInt())
1485 C = llvm::ConstantInt::get(CGM.getLLVMContext(), Value->getInt());
1486 if (Value->isFloat())
1487 C = llvm::ConstantFP::get(CGM.getLLVMContext(), Value->getFloat());
1488 }
1489 }
1490
1491 llvm::DINode::DIFlags Flags = getAccessFlag(Var->getAccess(), RD);
1492 auto Align = getDeclAlignIfRequired(Var, CGM.getContext());
1493 llvm::DIDerivedType *GV = DBuilder.createStaticMemberType(
1494 RecordTy, VName, VUnit, LineNumber, VTy, Flags, C, Align);
1495 StaticDataMemberCache[Var->getCanonicalDecl()].reset(GV);
1496 return GV;
1497}
1498
1499void CGDebugInfo::CollectRecordNormalField(
1500 const FieldDecl *field, uint64_t OffsetInBits, llvm::DIFile *tunit,
1501 SmallVectorImpl<llvm::Metadata *> &elements, llvm::DIType *RecordTy,
1502 const RecordDecl *RD) {
1503 StringRef name = field->getName();
1504 QualType type = field->getType();
1505
1506 // Ignore unnamed fields unless they're anonymous structs/unions.
1507 if (name.empty() && !type->isRecordType())
1508 return;
1509
1510 llvm::DIType *FieldType;
1511 if (field->isBitField()) {
1512 FieldType = createBitFieldType(field, RecordTy, RD);
1513 } else {
1514 auto Align = getDeclAlignIfRequired(field, CGM.getContext());
1515 FieldType =
1516 createFieldType(name, type, field->getLocation(), field->getAccess(),
1517 OffsetInBits, Align, tunit, RecordTy, RD);
1518 }
1519
1520 elements.push_back(FieldType);
1521}
1522
1523void CGDebugInfo::CollectRecordNestedType(
1524 const TypeDecl *TD, SmallVectorImpl<llvm::Metadata *> &elements) {
1525 QualType Ty = CGM.getContext().getTypeDeclType(TD);
1526 // Injected class names are not considered nested records.
1527 if (isa<InjectedClassNameType>(Ty))
1528 return;
1529 SourceLocation Loc = TD->getLocation();
1530 llvm::DIType *nestedType = getOrCreateType(Ty, getOrCreateFile(Loc));
1531 elements.push_back(nestedType);
1532}
1533
1534void CGDebugInfo::CollectRecordFields(
1535 const RecordDecl *record, llvm::DIFile *tunit,
1536 SmallVectorImpl<llvm::Metadata *> &elements,
1537 llvm::DICompositeType *RecordTy) {
1538 const auto *CXXDecl = dyn_cast<CXXRecordDecl>(record);
1539
1540 if (CXXDecl && CXXDecl->isLambda())
1541 CollectRecordLambdaFields(CXXDecl, elements, RecordTy);
1542 else {
1543 const ASTRecordLayout &layout = CGM.getContext().getASTRecordLayout(record);
1544
1545 // Field number for non-static fields.
1546 unsigned fieldNo = 0;
1547
1548 // Static and non-static members should appear in the same order as
1549 // the corresponding declarations in the source program.
1550 for (const auto *I : record->decls())
1551 if (const auto *V = dyn_cast<VarDecl>(I)) {
1552 if (V->hasAttr<NoDebugAttr>())
1553 continue;
1554
1555 // Skip variable template specializations when emitting CodeView. MSVC
1556 // doesn't emit them.
1557 if (CGM.getCodeGenOpts().EmitCodeView &&
1558 isa<VarTemplateSpecializationDecl>(V))
1559 continue;
1560
1561 if (isa<VarTemplatePartialSpecializationDecl>(V))
1562 continue;
1563
1564 // Reuse the existing static member declaration if one exists
1565 auto MI = StaticDataMemberCache.find(V->getCanonicalDecl());
1566 if (MI != StaticDataMemberCache.end()) {
1567 assert(MI->second &&((MI->second && "Static data member declaration should still exist"
) ? static_cast<void> (0) : __assert_fail ("MI->second && \"Static data member declaration should still exist\""
, "/build/llvm-toolchain-snapshot-13~++20210405022414+5f57793c4fe4/clang/lib/CodeGen/CGDebugInfo.cpp"
, 1568, __PRETTY_FUNCTION__))
1568 "Static data member declaration should still exist")((MI->second && "Static data member declaration should still exist"
) ? static_cast<void> (0) : __assert_fail ("MI->second && \"Static data member declaration should still exist\""
, "/build/llvm-toolchain-snapshot-13~++20210405022414+5f57793c4fe4/clang/lib/CodeGen/CGDebugInfo.cpp"
, 1568, __PRETTY_FUNCTION__))
;
1569 elements.push_back(MI->second);
1570 } else {
1571 auto Field = CreateRecordStaticField(V, RecordTy, record);
1572 elements.push_back(Field);
1573 }
1574 } else if (const auto *field = dyn_cast<FieldDecl>(I)) {
1575 CollectRecordNormalField(field, layout.getFieldOffset(fieldNo), tunit,
1576 elements, RecordTy, record);
1577
1578 // Bump field number for next field.
1579 ++fieldNo;
1580 } else if (CGM.getCodeGenOpts().EmitCodeView) {
1581 // Debug info for nested types is included in the member list only for
1582 // CodeView.
1583 if (const auto *nestedType = dyn_cast<TypeDecl>(I))
1584 if (!nestedType->isImplicit() &&
1585 nestedType->getDeclContext() == record)
1586 CollectRecordNestedType(nestedType, elements);
1587 }
1588 }
1589}
1590
1591llvm::DISubroutineType *
1592CGDebugInfo::getOrCreateMethodType(const CXXMethodDecl *Method,
1593 llvm::DIFile *Unit, bool decl) {
1594 const FunctionProtoType *Func = Method->getType()->getAs<FunctionProtoType>();
1595 if (Method->isStatic())
1596 return cast_or_null<llvm::DISubroutineType>(
1597 getOrCreateType(QualType(Func, 0), Unit));
1598 return getOrCreateInstanceMethodType(Method->getThisType(), Func, Unit, decl);
1599}
1600
1601llvm::DISubroutineType *
1602CGDebugInfo::getOrCreateInstanceMethodType(QualType ThisPtr,
1603 const FunctionProtoType *Func,
1604 llvm::DIFile *Unit, bool decl) {
1605 // Add "this" pointer.
1606 llvm::DITypeRefArray Args(
1607 cast<llvm::DISubroutineType>(getOrCreateType(QualType(Func, 0), Unit))
22
The object is a 'DISubroutineType'
1608 ->getTypeArray());
1609 assert(Args.size() && "Invalid number of arguments!")((Args.size() && "Invalid number of arguments!") ? static_cast
<void> (0) : __assert_fail ("Args.size() && \"Invalid number of arguments!\""
, "/build/llvm-toolchain-snapshot-13~++20210405022414+5f57793c4fe4/clang/lib/CodeGen/CGDebugInfo.cpp"
, 1609, __PRETTY_FUNCTION__))
;
23
Assuming the condition is true
24
'?' condition is true
1610
1611 SmallVector<llvm::Metadata *, 16> Elts;
1612 // First element is always return type. For 'void' functions it is NULL.
1613 QualType temp = Func->getReturnType();
25
Called C++ object pointer is null
1614 if (temp->getTypeClass() == Type::Auto && decl)
1615 Elts.push_back(CreateType(cast<AutoType>(temp)));
1616 else
1617 Elts.push_back(Args[0]);
1618
1619 // "this" pointer is always first argument.
1620 const CXXRecordDecl *RD = ThisPtr->getPointeeCXXRecordDecl();
1621 if (isa<ClassTemplateSpecializationDecl>(RD)) {
1622 // Create pointer type directly in this case.
1623 const PointerType *ThisPtrTy = cast<PointerType>(ThisPtr);
1624 QualType PointeeTy = ThisPtrTy->getPointeeType();
1625 unsigned AS = CGM.getContext().getTargetAddressSpace(PointeeTy);
1626 uint64_t Size = CGM.getTarget().getPointerWidth(AS);
1627 auto Align = getTypeAlignIfRequired(ThisPtrTy, CGM.getContext());
1628 llvm::DIType *PointeeType = getOrCreateType(PointeeTy, Unit);
1629 llvm::DIType *ThisPtrType =
1630 DBuilder.createPointerType(PointeeType, Size, Align);
1631 TypeCache[ThisPtr.getAsOpaquePtr()].reset(ThisPtrType);
1632 // TODO: This and the artificial type below are misleading, the
1633 // types aren't artificial the argument is, but the current
1634 // metadata doesn't represent that.
1635 ThisPtrType = DBuilder.createObjectPointerType(ThisPtrType);
1636 Elts.push_back(ThisPtrType);
1637 } else {
1638 llvm::DIType *ThisPtrType = getOrCreateType(ThisPtr, Unit);
1639 TypeCache[ThisPtr.getAsOpaquePtr()].reset(ThisPtrType);
1640 ThisPtrType = DBuilder.createObjectPointerType(ThisPtrType);
1641 Elts.push_back(ThisPtrType);
1642 }
1643
1644 // Copy rest of the arguments.
1645 for (unsigned i = 1, e = Args.size(); i != e; ++i)
1646 Elts.push_back(Args[i]);
1647
1648 llvm::DITypeRefArray EltTypeArray = DBuilder.getOrCreateTypeArray(Elts);
1649
1650 llvm::DINode::DIFlags Flags = llvm::DINode::FlagZero;
1651 if (Func->getExtProtoInfo().RefQualifier == RQ_LValue)
1652 Flags |= llvm::DINode::FlagLValueReference;
1653 if (Func->getExtProtoInfo().RefQualifier == RQ_RValue)
1654 Flags |= llvm::DINode::FlagRValueReference;
1655
1656 return DBuilder.createSubroutineType(EltTypeArray, Flags,
1657 getDwarfCC(Func->getCallConv()));
1658}
1659
1660/// isFunctionLocalClass - Return true if CXXRecordDecl is defined
1661/// inside a function.
1662static bool isFunctionLocalClass(const CXXRecordDecl *RD) {
1663 if (const auto *NRD = dyn_cast<CXXRecordDecl>(RD->getDeclContext()))
1664 return isFunctionLocalClass(NRD);
1665 if (isa<FunctionDecl>(RD->getDeclContext()))
1666 return true;
1667 return false;
1668}
1669
1670llvm::DISubprogram *CGDebugInfo::CreateCXXMemberFunction(
1671 const CXXMethodDecl *Method, llvm::DIFile *Unit, llvm::DIType *RecordTy) {
1672 bool IsCtorOrDtor =
1673 isa<CXXConstructorDecl>(Method) || isa<CXXDestructorDecl>(Method);
1674
1675 StringRef MethodName = getFunctionName(Method);
1676 llvm::DISubroutineType *MethodTy = getOrCreateMethodType(Method, Unit, true);
1677
1678 // Since a single ctor/dtor corresponds to multiple functions, it doesn't
1679 // make sense to give a single ctor/dtor a linkage name.
1680 StringRef MethodLinkageName;
1681 // FIXME: 'isFunctionLocalClass' seems like an arbitrary/unintentional
1682 // property to use here. It may've been intended to model "is non-external
1683 // type" but misses cases of non-function-local but non-external classes such
1684 // as those in anonymous namespaces as well as the reverse - external types
1685 // that are function local, such as those in (non-local) inline functions.
1686 if (!IsCtorOrDtor && !isFunctionLocalClass(Method->getParent()))
1687 MethodLinkageName = CGM.getMangledName(Method);
1688
1689 // Get the location for the method.
1690 llvm::DIFile *MethodDefUnit = nullptr;
1691 unsigned MethodLine = 0;
1692 if (!Method->isImplicit()) {
1693 MethodDefUnit = getOrCreateFile(Method->getLocation());
1694 MethodLine = getLineNumber(Method->getLocation());
1695 }
1696
1697 // Collect virtual method info.
1698 llvm::DIType *ContainingType = nullptr;
1699 unsigned VIndex = 0;
1700 llvm::DINode::DIFlags Flags = llvm::DINode::FlagZero;
1701 llvm::DISubprogram::DISPFlags SPFlags = llvm::DISubprogram::SPFlagZero;
1702 int ThisAdjustment = 0;
1703
1704 if (Method->isVirtual()) {
1705 if (Method->isPure())
1706 SPFlags |= llvm::DISubprogram::SPFlagPureVirtual;
1707 else
1708 SPFlags |= llvm::DISubprogram::SPFlagVirtual;
1709
1710 if (CGM.getTarget().getCXXABI().isItaniumFamily()) {
1711 // It doesn't make sense to give a virtual destructor a vtable index,
1712 // since a single destructor has two entries in the vtable.
1713 if (!isa<CXXDestructorDecl>(Method))
1714 VIndex = CGM.getItaniumVTableContext().getMethodVTableIndex(Method);
1715 } else {
1716 // Emit MS ABI vftable information. There is only one entry for the
1717 // deleting dtor.
1718 const auto *DD = dyn_cast<CXXDestructorDecl>(Method);
1719 GlobalDecl GD = DD ? GlobalDecl(DD, Dtor_Deleting) : GlobalDecl(Method);
1720 MethodVFTableLocation ML =
1721 CGM.getMicrosoftVTableContext().getMethodVFTableLocation(GD);
1722 VIndex = ML.Index;
1723
1724 // CodeView only records the vftable offset in the class that introduces
1725 // the virtual method. This is possible because, unlike Itanium, the MS
1726 // C++ ABI does not include all virtual methods from non-primary bases in
1727 // the vtable for the most derived class. For example, if C inherits from
1728 // A and B, C's primary vftable will not include B's virtual methods.
1729 if (Method->size_overridden_methods() == 0)
1730 Flags |= llvm::DINode::FlagIntroducedVirtual;
1731
1732 // The 'this' adjustment accounts for both the virtual and non-virtual
1733 // portions of the adjustment. Presumably the debugger only uses it when
1734 // it knows the dynamic type of an object.
1735 ThisAdjustment = CGM.getCXXABI()
1736 .getVirtualFunctionPrologueThisAdjustment(GD)
1737 .getQuantity();
1738 }
1739 ContainingType = RecordTy;
1740 }
1741
1742 // We're checking for deleted C++ special member functions
1743 // [Ctors,Dtors, Copy/Move]
1744 auto checkAttrDeleted = [&](const auto *Method) {
1745 if (Method->getCanonicalDecl()->isDeleted())
1746 SPFlags |= llvm::DISubprogram::SPFlagDeleted;
1747 };
1748
1749 switch (Method->getKind()) {
1750
1751 case Decl::CXXConstructor:
1752 case Decl::CXXDestructor:
1753 checkAttrDeleted(Method);
1754 break;
1755 case Decl::CXXMethod:
1756 if (Method->isCopyAssignmentOperator() ||
1757 Method->isMoveAssignmentOperator())
1758 checkAttrDeleted(Method);
1759 break;
1760 default:
1761 break;
1762 }
1763
1764 if (Method->isNoReturn())
1765 Flags |= llvm::DINode::FlagNoReturn;
1766
1767 if (Method->isStatic())
1768 Flags |= llvm::DINode::FlagStaticMember;
1769 if (Method->isImplicit())
1770 Flags |= llvm::DINode::FlagArtificial;
1771 Flags |= getAccessFlag(Method->getAccess(), Method->getParent());
1772 if (const auto *CXXC = dyn_cast<CXXConstructorDecl>(Method)) {
1773 if (CXXC->isExplicit())
1774 Flags |= llvm::DINode::FlagExplicit;
1775 } else if (const auto *CXXC = dyn_cast<CXXConversionDecl>(Method)) {
1776 if (CXXC->isExplicit())
1777 Flags |= llvm::DINode::FlagExplicit;
1778 }
1779 if (Method->hasPrototype())
1780 Flags |= llvm::DINode::FlagPrototyped;
1781 if (Method->getRefQualifier() == RQ_LValue)
1782 Flags |= llvm::DINode::FlagLValueReference;
1783 if (Method->getRefQualifier() == RQ_RValue)
1784 Flags |= llvm::DINode::FlagRValueReference;
1785 if (!Method->isExternallyVisible())
1786 SPFlags |= llvm::DISubprogram::SPFlagLocalToUnit;
1787 if (CGM.getLangOpts().Optimize)
1788 SPFlags |= llvm::DISubprogram::SPFlagOptimized;
1789
1790 // In this debug mode, emit type info for a class when its constructor type
1791 // info is emitted.
1792 if (DebugKind == codegenoptions::DebugInfoConstructor)
1793 if (const CXXConstructorDecl *CD = dyn_cast<CXXConstructorDecl>(Method))
1794 completeUnusedClass(*CD->getParent());
1795
1796 llvm::DINodeArray TParamsArray = CollectFunctionTemplateParams(Method, Unit);
1797 llvm::DISubprogram *SP = DBuilder.createMethod(
1798 RecordTy, MethodName, MethodLinkageName, MethodDefUnit, MethodLine,
1799 MethodTy, VIndex, ThisAdjustment, ContainingType, Flags, SPFlags,
1800 TParamsArray.get());
1801
1802 SPCache[Method->getCanonicalDecl()].reset(SP);
1803
1804 return SP;
1805}
1806
1807void CGDebugInfo::CollectCXXMemberFunctions(
1808 const CXXRecordDecl *RD, llvm::DIFile *Unit,
1809 SmallVectorImpl<llvm::Metadata *> &EltTys, llvm::DIType *RecordTy) {
1810
1811 // Since we want more than just the individual member decls if we
1812 // have templated functions iterate over every declaration to gather
1813 // the functions.
1814 for (const auto *I : RD->decls()) {
1815 const auto *Method = dyn_cast<CXXMethodDecl>(I);
1816 // If the member is implicit, don't add it to the member list. This avoids
1817 // the member being added to type units by LLVM, while still allowing it
1818 // to be emitted into the type declaration/reference inside the compile
1819 // unit.
1820 // Ditto 'nodebug' methods, for consistency with CodeGenFunction.cpp.
1821 // FIXME: Handle Using(Shadow?)Decls here to create
1822 // DW_TAG_imported_declarations inside the class for base decls brought into
1823 // derived classes. GDB doesn't seem to notice/leverage these when I tried
1824 // it, so I'm not rushing to fix this. (GCC seems to produce them, if
1825 // referenced)
1826 if (!Method || Method->isImplicit() || Method->hasAttr<NoDebugAttr>())
1827 continue;
1828
1829 if (Method->getType()->castAs<FunctionProtoType>()->getContainedAutoType())
1830 continue;
1831
1832 // Reuse the existing member function declaration if it exists.
1833 // It may be associated with the declaration of the type & should be
1834 // reused as we're building the definition.
1835 //
1836 // This situation can arise in the vtable-based debug info reduction where
1837 // implicit members are emitted in a non-vtable TU.
1838 auto MI = SPCache.find(Method->getCanonicalDecl());
1839 EltTys.push_back(MI == SPCache.end()
1840 ? CreateCXXMemberFunction(Method, Unit, RecordTy)
1841 : static_cast<llvm::Metadata *>(MI->second));
1842 }
1843}
1844
1845void CGDebugInfo::CollectCXXBases(const CXXRecordDecl *RD, llvm::DIFile *Unit,
1846 SmallVectorImpl<llvm::Metadata *> &EltTys,
1847 llvm::DIType *RecordTy) {
1848 llvm::DenseSet<CanonicalDeclPtr<const CXXRecordDecl>> SeenTypes;
1849 CollectCXXBasesAux(RD, Unit, EltTys, RecordTy, RD->bases(), SeenTypes,
1850 llvm::DINode::FlagZero);
1851
1852 // If we are generating CodeView debug info, we also need to emit records for
1853 // indirect virtual base classes.
1854 if (CGM.getCodeGenOpts().EmitCodeView) {
1855 CollectCXXBasesAux(RD, Unit, EltTys, RecordTy, RD->vbases(), SeenTypes,
1856 llvm::DINode::FlagIndirectVirtualBase);
1857 }
1858}
1859
1860void CGDebugInfo::CollectCXXBasesAux(
1861 const CXXRecordDecl *RD, llvm::DIFile *Unit,
1862 SmallVectorImpl<llvm::Metadata *> &EltTys, llvm::DIType *RecordTy,
1863 const CXXRecordDecl::base_class_const_range &Bases,
1864 llvm::DenseSet<CanonicalDeclPtr<const CXXRecordDecl>> &SeenTypes,
1865 llvm::DINode::DIFlags StartingFlags) {
1866 const ASTRecordLayout &RL = CGM.getContext().getASTRecordLayout(RD);
1867 for (const auto &BI : Bases) {
1868 const auto *Base =
1869 cast<CXXRecordDecl>(BI.getType()->castAs<RecordType>()->getDecl());
1870 if (!SeenTypes.insert(Base).second)
1871 continue;
1872 auto *BaseTy = getOrCreateType(BI.getType(), Unit);
1873 llvm::DINode::DIFlags BFlags = StartingFlags;
1874 uint64_t BaseOffset;
1875 uint32_t VBPtrOffset = 0;
1876
1877 if (BI.isVirtual()) {
1878 if (CGM.getTarget().getCXXABI().isItaniumFamily()) {
1879 // virtual base offset offset is -ve. The code generator emits dwarf
1880 // expression where it expects +ve number.
1881 BaseOffset = 0 - CGM.getItaniumVTableContext()
1882 .getVirtualBaseOffsetOffset(RD, Base)
1883 .getQuantity();
1884 } else {
1885 // In the MS ABI, store the vbtable offset, which is analogous to the
1886 // vbase offset offset in Itanium.
1887 BaseOffset =
1888 4 * CGM.getMicrosoftVTableContext().getVBTableIndex(RD, Base);
1889 VBPtrOffset = CGM.getContext()
1890 .getASTRecordLayout(RD)
1891 .getVBPtrOffset()
1892 .getQuantity();
1893 }
1894 BFlags |= llvm::DINode::FlagVirtual;
1895 } else
1896 BaseOffset = CGM.getContext().toBits(RL.getBaseClassOffset(Base));
1897 // FIXME: Inconsistent units for BaseOffset. It is in bytes when
1898 // BI->isVirtual() and bits when not.
1899
1900 BFlags |= getAccessFlag(BI.getAccessSpecifier(), RD);
1901 llvm::DIType *DTy = DBuilder.createInheritance(RecordTy, BaseTy, BaseOffset,
1902 VBPtrOffset, BFlags);
1903 EltTys.push_back(DTy);
1904 }
1905}
1906
1907llvm::DINodeArray
1908CGDebugInfo::CollectTemplateParams(const TemplateParameterList *TPList,
1909 ArrayRef<TemplateArgument> TAList,
1910 llvm::DIFile *Unit) {
1911 SmallVector<llvm::Metadata *, 16> TemplateParams;
1912 for (unsigned i = 0, e = TAList.size(); i != e; ++i) {
1913 const TemplateArgument &TA = TAList[i];
1914 StringRef Name;
1915 bool defaultParameter = false;
1916 if (TPList)
1917 Name = TPList->getParam(i)->getName();
1918 switch (TA.getKind()) {
1919 case TemplateArgument::Type: {
1920 llvm::DIType *TTy = getOrCreateType(TA.getAsType(), Unit);
1921
1922 if (TPList)
1923 if (auto *templateType =
1924 dyn_cast_or_null<TemplateTypeParmDecl>(TPList->getParam(i)))
1925 if (templateType->hasDefaultArgument())
1926 defaultParameter =
1927 templateType->getDefaultArgument() == TA.getAsType();
1928
1929 TemplateParams.push_back(DBuilder.createTemplateTypeParameter(
1930 TheCU, Name, TTy, defaultParameter));
1931
1932 } break;
1933 case TemplateArgument::Integral: {
1934 llvm::DIType *TTy = getOrCreateType(TA.getIntegralType(), Unit);
1935 if (TPList && CGM.getCodeGenOpts().DwarfVersion >= 5)
1936 if (auto *templateType =
1937 dyn_cast_or_null<NonTypeTemplateParmDecl>(TPList->getParam(i)))
1938 if (templateType->hasDefaultArgument() &&
1939 !templateType->getDefaultArgument()->isValueDependent())
1940 defaultParameter = llvm::APSInt::isSameValue(
1941 templateType->getDefaultArgument()->EvaluateKnownConstInt(
1942 CGM.getContext()),
1943 TA.getAsIntegral());
1944
1945 TemplateParams.push_back(DBuilder.createTemplateValueParameter(
1946 TheCU, Name, TTy, defaultParameter,
1947 llvm::ConstantInt::get(CGM.getLLVMContext(), TA.getAsIntegral())));
1948 } break;
1949 case TemplateArgument::Declaration: {
1950 const ValueDecl *D = TA.getAsDecl();
1951 QualType T = TA.getParamTypeForDecl().getDesugaredType(CGM.getContext());
1952 llvm::DIType *TTy = getOrCreateType(T, Unit);
1953 llvm::Constant *V = nullptr;
1954 // Skip retrieve the value if that template parameter has cuda device
1955 // attribute, i.e. that value is not available at the host side.
1956 if (!CGM.getLangOpts().CUDA || CGM.getLangOpts().CUDAIsDevice ||
1957 !D->hasAttr<CUDADeviceAttr>()) {
1958 const CXXMethodDecl *MD;
1959 // Variable pointer template parameters have a value that is the address
1960 // of the variable.
1961 if (const auto *VD = dyn_cast<VarDecl>(D))
1962 V = CGM.GetAddrOfGlobalVar(VD);
1963 // Member function pointers have special support for building them,
1964 // though this is currently unsupported in LLVM CodeGen.
1965 else if ((MD = dyn_cast<CXXMethodDecl>(D)) && MD->isInstance())
1966 V = CGM.getCXXABI().EmitMemberFunctionPointer(MD);
1967 else if (const auto *FD = dyn_cast<FunctionDecl>(D))
1968 V = CGM.GetAddrOfFunction(FD);
1969 // Member data pointers have special handling too to compute the fixed
1970 // offset within the object.
1971 else if (const auto *MPT =
1972 dyn_cast<MemberPointerType>(T.getTypePtr())) {
1973 // These five lines (& possibly the above member function pointer
1974 // handling) might be able to be refactored to use similar code in
1975 // CodeGenModule::getMemberPointerConstant
1976 uint64_t fieldOffset = CGM.getContext().getFieldOffset(D);
1977 CharUnits chars =
1978 CGM.getContext().toCharUnitsFromBits((int64_t)fieldOffset);
1979 V = CGM.getCXXABI().EmitMemberDataPointer(MPT, chars);
1980 } else if (const auto *GD = dyn_cast<MSGuidDecl>(D)) {
1981 V = CGM.GetAddrOfMSGuidDecl(GD).getPointer();
1982 } else if (const auto *TPO = dyn_cast<TemplateParamObjectDecl>(D)) {
1983 if (T->isRecordType())
1984 V = ConstantEmitter(CGM).emitAbstract(
1985 SourceLocation(), TPO->getValue(), TPO->getType());
1986 else
1987 V = CGM.GetAddrOfTemplateParamObject(TPO).getPointer();
1988 }
1989 assert(V && "Failed to find template parameter pointer")((V && "Failed to find template parameter pointer") ?
static_cast<void> (0) : __assert_fail ("V && \"Failed to find template parameter pointer\""
, "/build/llvm-toolchain-snapshot-13~++20210405022414+5f57793c4fe4/clang/lib/CodeGen/CGDebugInfo.cpp"
, 1989, __PRETTY_FUNCTION__))
;
1990 V = V->stripPointerCasts();
1991 }
1992 TemplateParams.push_back(DBuilder.createTemplateValueParameter(
1993 TheCU, Name, TTy, defaultParameter, cast_or_null<llvm::Constant>(V)));
1994 } break;
1995 case TemplateArgument::NullPtr: {
1996 QualType T = TA.getNullPtrType();
1997 llvm::DIType *TTy = getOrCreateType(T, Unit);
1998 llvm::Constant *V = nullptr;
1999 // Special case member data pointer null values since they're actually -1
2000 // instead of zero.
2001 if (const auto *MPT = dyn_cast<MemberPointerType>(T.getTypePtr()))
2002 // But treat member function pointers as simple zero integers because
2003 // it's easier than having a special case in LLVM's CodeGen. If LLVM
2004 // CodeGen grows handling for values of non-null member function
2005 // pointers then perhaps we could remove this special case and rely on
2006 // EmitNullMemberPointer for member function pointers.
2007 if (MPT->isMemberDataPointer())
2008 V = CGM.getCXXABI().EmitNullMemberPointer(MPT);
2009 if (!V)
2010 V = llvm::ConstantInt::get(CGM.Int8Ty, 0);
2011 TemplateParams.push_back(DBuilder.createTemplateValueParameter(
2012 TheCU, Name, TTy, defaultParameter, V));
2013 } break;
2014 case TemplateArgument::Template:
2015 TemplateParams.push_back(DBuilder.createTemplateTemplateParameter(
2016 TheCU, Name, nullptr,
2017 TA.getAsTemplate().getAsTemplateDecl()->getQualifiedNameAsString()));
2018 break;
2019 case TemplateArgument::Pack:
2020 TemplateParams.push_back(DBuilder.createTemplateParameterPack(
2021 TheCU, Name, nullptr,
2022 CollectTemplateParams(nullptr, TA.getPackAsArray(), Unit)));
2023 break;
2024 case TemplateArgument::Expression: {
2025 const Expr *E = TA.getAsExpr();
2026 QualType T = E->getType();
2027 if (E->isGLValue())
2028 T = CGM.getContext().getLValueReferenceType(T);
2029 llvm::Constant *V = ConstantEmitter(CGM).emitAbstract(E, T);
2030 assert(V && "Expression in template argument isn't constant")((V && "Expression in template argument isn't constant"
) ? static_cast<void> (0) : __assert_fail ("V && \"Expression in template argument isn't constant\""
, "/build/llvm-toolchain-snapshot-13~++20210405022414+5f57793c4fe4/clang/lib/CodeGen/CGDebugInfo.cpp"
, 2030, __PRETTY_FUNCTION__))
;
2031 llvm::DIType *TTy = getOrCreateType(T, Unit);
2032 TemplateParams.push_back(DBuilder.createTemplateValueParameter(
2033 TheCU, Name, TTy, defaultParameter, V->stripPointerCasts()));
2034 } break;
2035 // And the following should never occur:
2036 case TemplateArgument::TemplateExpansion:
2037 case TemplateArgument::Null:
2038 llvm_unreachable(::llvm::llvm_unreachable_internal("These argument types shouldn't exist in concrete types"
, "/build/llvm-toolchain-snapshot-13~++20210405022414+5f57793c4fe4/clang/lib/CodeGen/CGDebugInfo.cpp"
, 2039)
2039 "These argument types shouldn't exist in concrete types")::llvm::llvm_unreachable_internal("These argument types shouldn't exist in concrete types"
, "/build/llvm-toolchain-snapshot-13~++20210405022414+5f57793c4fe4/clang/lib/CodeGen/CGDebugInfo.cpp"
, 2039)
;
2040 }
2041 }
2042 return DBuilder.getOrCreateArray(TemplateParams);
2043}
2044
2045llvm::DINodeArray
2046CGDebugInfo::CollectFunctionTemplateParams(const FunctionDecl *FD,
2047 llvm::DIFile *Unit) {
2048 if (FD->getTemplatedKind() ==
2049 FunctionDecl::TK_FunctionTemplateSpecialization) {
2050 const TemplateParameterList *TList = FD->getTemplateSpecializationInfo()
2051 ->getTemplate()
2052 ->getTemplateParameters();
2053 return CollectTemplateParams(
2054 TList, FD->getTemplateSpecializationArgs()->asArray(), Unit);
2055 }
2056 return llvm::DINodeArray();
2057}
2058
2059llvm::DINodeArray CGDebugInfo::CollectVarTemplateParams(const VarDecl *VL,
2060 llvm::DIFile *Unit) {
2061 // Always get the full list of parameters, not just the ones from the
2062 // specialization. A partial specialization may have fewer parameters than
2063 // there are arguments.
2064 auto *TS = dyn_cast<VarTemplateSpecializationDecl>(VL);
2065 if (!TS)
2066 return llvm::DINodeArray();
2067 VarTemplateDecl *T = TS->getSpecializedTemplate();
2068 const TemplateParameterList *TList = T->getTemplateParameters();
2069 auto TA = TS->getTemplateArgs().asArray();
2070 return CollectTemplateParams(TList, TA, Unit);
2071}
2072
2073llvm::DINodeArray CGDebugInfo::CollectCXXTemplateParams(
2074 const ClassTemplateSpecializationDecl *TSpecial, llvm::DIFile *Unit) {
2075 // Always get the full list of parameters, not just the ones from the
2076 // specialization. A partial specialization may have fewer parameters than
2077 // there are arguments.
2078 TemplateParameterList *TPList =
2079 TSpecial->getSpecializedTemplate()->getTemplateParameters();
2080 const TemplateArgumentList &TAList = TSpecial->getTemplateArgs();
2081 return CollectTemplateParams(TPList, TAList.asArray(), Unit);
2082}
2083
2084llvm::DIType *CGDebugInfo::getOrCreateVTablePtrType(llvm::DIFile *Unit) {
2085 if (VTablePtrType)
2086 return VTablePtrType;
2087
2088 ASTContext &Context = CGM.getContext();
2089
2090 /* Function type */
2091 llvm::Metadata *STy = getOrCreateType(Context.IntTy, Unit);
2092 llvm::DITypeRefArray SElements = DBuilder.getOrCreateTypeArray(STy);
2093 llvm::DIType *SubTy = DBuilder.createSubroutineType(SElements);
2094 unsigned Size = Context.getTypeSize(Context.VoidPtrTy);
2095 unsigned VtblPtrAddressSpace = CGM.getTarget().getVtblPtrAddressSpace();
2096 Optional<unsigned> DWARFAddressSpace =
2097 CGM.getTarget().getDWARFAddressSpace(VtblPtrAddressSpace);
2098
2099 llvm::DIType *vtbl_ptr_type = DBuilder.createPointerType(
2100 SubTy, Size, 0, DWARFAddressSpace, "__vtbl_ptr_type");
2101 VTablePtrType = DBuilder.createPointerType(vtbl_ptr_type, Size);
2102 return VTablePtrType;
2103}
2104
2105StringRef CGDebugInfo::getVTableName(const CXXRecordDecl *RD) {
2106 // Copy the gdb compatible name on the side and use its reference.
2107 return internString("_vptr$", RD->getNameAsString());
2108}
2109
2110StringRef CGDebugInfo::getDynamicInitializerName(const VarDecl *VD,
2111 DynamicInitKind StubKind,
2112 llvm::Function *InitFn) {
2113 // If we're not emitting codeview, use the mangled name. For Itanium, this is
2114 // arbitrary.
2115 if (!CGM.getCodeGenOpts().EmitCodeView ||
2116 StubKind == DynamicInitKind::GlobalArrayDestructor)
2117 return InitFn->getName();
2118
2119 // Print the normal qualified name for the variable, then break off the last
2120 // NNS, and add the appropriate other text. Clang always prints the global
2121 // variable name without template arguments, so we can use rsplit("::") and
2122 // then recombine the pieces.
2123 SmallString<128> QualifiedGV;
2124 StringRef Quals;
2125 StringRef GVName;
2126 {
2127 llvm::raw_svector_ostream OS(QualifiedGV);
2128 VD->printQualifiedName(OS, getPrintingPolicy());
2129 std::tie(Quals, GVName) = OS.str().rsplit("::");
2130 if (GVName.empty())
2131 std::swap(Quals, GVName);
2132 }
2133
2134 SmallString<128> InitName;
2135 llvm::raw_svector_ostream OS(InitName);
2136 if (!Quals.empty())
2137 OS << Quals << "::";
2138
2139 switch (StubKind) {
2140 case DynamicInitKind::NoStub:
2141 case DynamicInitKind::GlobalArrayDestructor:
2142 llvm_unreachable("not an initializer")::llvm::llvm_unreachable_internal("not an initializer", "/build/llvm-toolchain-snapshot-13~++20210405022414+5f57793c4fe4/clang/lib/CodeGen/CGDebugInfo.cpp"
, 2142)
;
2143 case DynamicInitKind::Initializer:
2144 OS << "`dynamic initializer for '";
2145 break;
2146 case DynamicInitKind::AtExit:
2147 OS << "`dynamic atexit destructor for '";
2148 break;
2149 }
2150
2151 OS << GVName;
2152
2153 // Add any template specialization args.
2154 if (const auto *VTpl = dyn_cast<VarTemplateSpecializationDecl>(VD)) {
2155 printTemplateArgumentList(OS, VTpl->getTemplateArgs().asArray(),
2156 getPrintingPolicy());
2157 }
2158
2159 OS << '\'';
2160
2161 return internString(OS.str());
2162}
2163
2164void CGDebugInfo::CollectVTableInfo(const CXXRecordDecl *RD, llvm::DIFile *Unit,
2165 SmallVectorImpl<llvm::Metadata *> &EltTys) {
2166 // If this class is not dynamic then there is not any vtable info to collect.
2167 if (!RD->isDynamicClass())
2168 return;
2169
2170 // Don't emit any vtable shape or vptr info if this class doesn't have an
2171 // extendable vfptr. This can happen if the class doesn't have virtual
2172 // methods, or in the MS ABI if those virtual methods only come from virtually
2173 // inherited bases.
2174 const ASTRecordLayout &RL = CGM.getContext().getASTRecordLayout(RD);
2175 if (!RL.hasExtendableVFPtr())
2176 return;
2177
2178 // CodeView needs to know how large the vtable of every dynamic class is, so
2179 // emit a special named pointer type into the element list. The vptr type
2180 // points to this type as well.
2181 llvm::DIType *VPtrTy = nullptr;
2182 bool NeedVTableShape = CGM.getCodeGenOpts().EmitCodeView &&
2183 CGM.getTarget().getCXXABI().isMicrosoft();
2184 if (NeedVTableShape) {
2185 uint64_t PtrWidth =
2186 CGM.getContext().getTypeSize(CGM.getContext().VoidPtrTy);
2187 const VTableLayout &VFTLayout =
2188 CGM.getMicrosoftVTableContext().getVFTableLayout(RD, CharUnits::Zero());
2189 unsigned VSlotCount =
2190 VFTLayout.vtable_components().size() - CGM.getLangOpts().RTTIData;
2191 unsigned VTableWidth = PtrWidth * VSlotCount;
2192 unsigned VtblPtrAddressSpace = CGM.getTarget().getVtblPtrAddressSpace();
2193 Optional<unsigned> DWARFAddressSpace =
2194 CGM.getTarget().getDWARFAddressSpace(VtblPtrAddressSpace);
2195
2196 // Create a very wide void* type and insert it directly in the element list.
2197 llvm::DIType *VTableType = DBuilder.createPointerType(
2198 nullptr, VTableWidth, 0, DWARFAddressSpace, "__vtbl_ptr_type");
2199 EltTys.push_back(VTableType);
2200
2201 // The vptr is a pointer to this special vtable type.
2202 VPtrTy = DBuilder.createPointerType(VTableType, PtrWidth);
2203 }
2204
2205 // If there is a primary base then the artificial vptr member lives there.
2206 if (RL.getPrimaryBase())
2207 return;
2208
2209 if (!VPtrTy)
2210 VPtrTy = getOrCreateVTablePtrType(Unit);
2211
2212 unsigned Size = CGM.getContext().getTypeSize(CGM.getContext().VoidPtrTy);
2213 llvm::DIType *VPtrMember =
2214 DBuilder.createMemberType(Unit, getVTableName(RD), Unit, 0, Size, 0, 0,
2215 llvm::DINode::FlagArtificial, VPtrTy);
2216 EltTys.push_back(VPtrMember);
2217}
2218
2219llvm::DIType *CGDebugInfo::getOrCreateRecordType(QualType RTy,
2220 SourceLocation Loc) {
2221 assert(CGM.getCodeGenOpts().hasReducedDebugInfo())((CGM.getCodeGenOpts().hasReducedDebugInfo()) ? static_cast<
void> (0) : __assert_fail ("CGM.getCodeGenOpts().hasReducedDebugInfo()"
, "/build/llvm-toolchain-snapshot-13~++20210405022414+5f57793c4fe4/clang/lib/CodeGen/CGDebugInfo.cpp"
, 2221, __PRETTY_FUNCTION__))
;
2222 llvm::DIType *T = getOrCreateType(RTy, getOrCreateFile(Loc));
2223 return T;
2224}
2225
2226llvm::DIType *CGDebugInfo::getOrCreateInterfaceType(QualType D,
2227 SourceLocation Loc) {
2228 return getOrCreateStandaloneType(D, Loc);
2229}
2230
2231llvm::DIType *CGDebugInfo::getOrCreateStandaloneType(QualType D,
2232 SourceLocation Loc) {
2233 assert(CGM.getCodeGenOpts().hasReducedDebugInfo())((CGM.getCodeGenOpts().hasReducedDebugInfo()) ? static_cast<
void> (0) : __assert_fail ("CGM.getCodeGenOpts().hasReducedDebugInfo()"
, "/build/llvm-toolchain-snapshot-13~++20210405022414+5f57793c4fe4/clang/lib/CodeGen/CGDebugInfo.cpp"
, 2233, __PRETTY_FUNCTION__))
;
2234 assert(!D.isNull() && "null type")((!D.isNull() && "null type") ? static_cast<void>
(0) : __assert_fail ("!D.isNull() && \"null type\"",
"/build/llvm-toolchain-snapshot-13~++20210405022414+5f57793c4fe4/clang/lib/CodeGen/CGDebugInfo.cpp"
, 2234, __PRETTY_FUNCTION__))
;
2235 llvm::DIType *T = getOrCreateType(D, getOrCreateFile(Loc));
2236 assert(T && "could not create debug info for type")((T && "could not create debug info for type") ? static_cast
<void> (0) : __assert_fail ("T && \"could not create debug info for type\""
, "/build/llvm-toolchain-snapshot-13~++20210405022414+5f57793c4fe4/clang/lib/CodeGen/CGDebugInfo.cpp"
, 2236, __PRETTY_FUNCTION__))
;
2237
2238 RetainedTypes.push_back(D.getAsOpaquePtr());
2239 return T;
2240}
2241
2242void CGDebugInfo::addHeapAllocSiteMetadata(llvm::CallBase *CI,
2243 QualType AllocatedTy,
2244 SourceLocation Loc) {
2245 if (CGM.getCodeGenOpts().getDebugInfo() <=
2246 codegenoptions::DebugLineTablesOnly)
2247 return;
2248 llvm::MDNode *node;
2249 if (AllocatedTy->isVoidType())
2250 node = llvm::MDNode::get(CGM.getLLVMContext(), None);
2251 else
2252 node = getOrCreateType(AllocatedTy, getOrCreateFile(Loc));
2253
2254 CI->setMetadata("heapallocsite", node);
2255}
2256
2257void CGDebugInfo::completeType(const EnumDecl *ED) {
2258 if (DebugKind <= codegenoptions::DebugLineTablesOnly)
2259 return;
2260 QualType Ty = CGM.getContext().getEnumType(ED);
2261 void *TyPtr = Ty.getAsOpaquePtr();
2262 auto I = TypeCache.find(TyPtr);
2263 if (I == TypeCache.end() || !cast<llvm::DIType>(I->second)->isForwardDecl())
2264 return;
2265 llvm::DIType *Res = CreateTypeDefinition(Ty->castAs<EnumType>());
2266 assert(!Res->isForwardDecl())((!Res->isForwardDecl()) ? static_cast<void> (0) : __assert_fail
("!Res->isForwardDecl()", "/build/llvm-toolchain-snapshot-13~++20210405022414+5f57793c4fe4/clang/lib/CodeGen/CGDebugInfo.cpp"
, 2266, __PRETTY_FUNCTION__))
;
2267 TypeCache[TyPtr].reset(Res);
2268}
2269
2270void CGDebugInfo::completeType(const RecordDecl *RD) {
2271 if (DebugKind > codegenoptions::LimitedDebugInfo ||
2272 !CGM.getLangOpts().CPlusPlus)
2273 completeRequiredType(RD);
2274}
2275
2276/// Return true if the class or any of its methods are marked dllimport.
2277static bool isClassOrMethodDLLImport(const CXXRecordDecl *RD) {
2278 if (RD->hasAttr<DLLImportAttr>())
2279 return true;
2280 for (const CXXMethodDecl *MD : RD->methods())
2281 if (MD->hasAttr<DLLImportAttr>())
2282 return true;
2283 return false;
2284}
2285
2286/// Does a type definition exist in an imported clang module?
2287static bool isDefinedInClangModule(const RecordDecl *RD) {
2288 // Only definitions that where imported from an AST file come from a module.
2289 if (!RD || !RD->isFromASTFile())
2290 return false;
2291 // Anonymous entities cannot be addressed. Treat them as not from module.
2292 if (!RD->isExternallyVisible() && RD->getName().empty())
2293 return false;
2294 if (auto *CXXDecl = dyn_cast<CXXRecordDecl>(RD)) {
2295 if (!CXXDecl->isCompleteDefinition())
2296 return false;
2297 // Check wether RD is a template.
2298 auto TemplateKind = CXXDecl->getTemplateSpecializationKind();
2299 if (TemplateKind != TSK_Undeclared) {
2300 // Unfortunately getOwningModule() isn't accurate enough to find the
2301 // owning module of a ClassTemplateSpecializationDecl that is inside a
2302 // namespace spanning multiple modules.
2303 bool Explicit = false;
2304 if (auto *TD = dyn_cast<ClassTemplateSpecializationDecl>(CXXDecl))
2305 Explicit = TD->isExplicitInstantiationOrSpecialization();
2306 if (!Explicit && CXXDecl->getEnclosingNamespaceContext())
2307 return false;
2308 // This is a template, check the origin of the first member.
2309 if (CXXDecl->field_begin() == CXXDecl->field_end())
2310 return TemplateKind == TSK_ExplicitInstantiationDeclaration;
2311 if (!CXXDecl->field_begin()->isFromASTFile())
2312 return false;
2313 }
2314 }
2315 return true;
2316}
2317
2318void CGDebugInfo::completeClassData(const RecordDecl *RD) {
2319 if (auto *CXXRD = dyn_cast<CXXRecordDecl>(RD))
2320 if (CXXRD->isDynamicClass() &&
2321 CGM.getVTableLinkage(CXXRD) ==
2322 llvm::GlobalValue::AvailableExternallyLinkage &&
2323 !isClassOrMethodDLLImport(CXXRD))
2324 return;
2325
2326 if (DebugTypeExtRefs && isDefinedInClangModule(RD->getDefinition()))
2327 return;
2328
2329 completeClass(RD);
2330}
2331
2332void CGDebugInfo::completeClass(const RecordDecl *RD) {
2333 if (DebugKind <= codegenoptions::DebugLineTablesOnly)
2334 return;
2335 QualType Ty = CGM.getContext().getRecordType(RD);
2336 void *TyPtr = Ty.getAsOpaquePtr();
2337 auto I = TypeCache.find(TyPtr);
2338 if (I != TypeCache.end() && !cast<llvm::DIType>(I->second)->isForwardDecl())
2339 return;
2340 llvm::DIType *Res = CreateTypeDefinition(Ty->castAs<RecordType>());
2341 assert(!Res->isForwardDecl())((!Res->isForwardDecl()) ? static_cast<void> (0) : __assert_fail
("!Res->isForwardDecl()", "/build/llvm-toolchain-snapshot-13~++20210405022414+5f57793c4fe4/clang/lib/CodeGen/CGDebugInfo.cpp"
, 2341, __PRETTY_FUNCTION__))
;
2342 TypeCache[TyPtr].reset(Res);
2343}
2344
2345static bool hasExplicitMemberDefinition(CXXRecordDecl::method_iterator I,
2346 CXXRecordDecl::method_iterator End) {
2347 for (CXXMethodDecl *MD : llvm::make_range(I, End))
2348 if (FunctionDecl *Tmpl = MD->getInstantiatedFromMemberFunction())
2349 if (!Tmpl->isImplicit() && Tmpl->isThisDeclarationADefinition() &&
2350 !MD->getMemberSpecializationInfo()->isExplicitSpecialization())
2351 return true;
2352 return false;
2353}
2354
2355static bool canUseCtorHoming(const CXXRecordDecl *RD) {
2356 // Constructor homing can be used for classes that cannnot be constructed
2357 // without emitting code for one of their constructors. This is classes that
2358 // don't have trivial or constexpr constructors, or can be created from
2359 // aggregate initialization. Also skip lambda objects because they don't call
2360 // constructors.
2361
2362 // Skip this optimization if the class or any of its methods are marked
2363 // dllimport.
2364 if (isClassOrMethodDLLImport(RD))
2365 return false;
2366
2367 return !RD->isLambda() && !RD->isAggregate() &&
2368 !RD->hasTrivialDefaultConstructor() &&
2369 !RD->hasConstexprNonCopyMoveConstructor();
2370}
2371
2372static bool shouldOmitDefinition(codegenoptions::DebugInfoKind DebugKind,
2373 bool DebugTypeExtRefs, const RecordDecl *RD,
2374 const LangOptions &LangOpts) {
2375 if (DebugTypeExtRefs && isDefinedInClangModule(RD->getDefinition()))
2376 return true;
2377
2378 if (auto *ES = RD->getASTContext().getExternalSource())
2379 if (ES->hasExternalDefinitions(RD) == ExternalASTSource::EK_Always)
2380 return true;
2381
2382 // Only emit forward declarations in line tables only to keep debug info size
2383 // small. This only applies to CodeView, since we don't emit types in DWARF
2384 // line tables only.
2385 if (DebugKind == codegenoptions::DebugLineTablesOnly)
2386 return true;
2387
2388 if (DebugKind > codegenoptions::LimitedDebugInfo ||
2389 RD->hasAttr<StandaloneDebugAttr>())
2390 return false;
2391
2392 if (!LangOpts.CPlusPlus)
2393 return false;
2394
2395 if (!RD->isCompleteDefinitionRequired())
2396 return true;
2397
2398 const auto *CXXDecl = dyn_cast<CXXRecordDecl>(RD);
2399
2400 if (!CXXDecl)
2401 return false;
2402
2403 // Only emit complete debug info for a dynamic class when its vtable is
2404 // emitted. However, Microsoft debuggers don't resolve type information
2405 // across DLL boundaries, so skip this optimization if the class or any of its
2406 // methods are marked dllimport. This isn't a complete solution, since objects
2407 // without any dllimport methods can be used in one DLL and constructed in
2408 // another, but it is the current behavior of LimitedDebugInfo.
2409 if (CXXDecl->hasDefinition() && CXXDecl->isDynamicClass() &&
2410 !isClassOrMethodDLLImport(CXXDecl))
2411 return true;
2412
2413 TemplateSpecializationKind Spec = TSK_Undeclared;
2414 if (const auto *SD = dyn_cast<ClassTemplateSpecializationDecl>(RD))
2415 Spec = SD->getSpecializationKind();
2416
2417 if (Spec == TSK_ExplicitInstantiationDeclaration &&
2418 hasExplicitMemberDefinition(CXXDecl->method_begin(),
2419 CXXDecl->method_end()))
2420 return true;
2421
2422 // In constructor homing mode, only emit complete debug info for a class
2423 // when its constructor is emitted.
2424 if ((DebugKind == codegenoptions::DebugInfoConstructor) &&
2425 canUseCtorHoming(CXXDecl))
2426 return true;
2427
2428 return false;
2429}
2430
2431void CGDebugInfo::completeRequiredType(const RecordDecl *RD) {
2432 if (shouldOmitDefinition(DebugKind, DebugTypeExtRefs, RD, CGM.getLangOpts()))
2433 return;
2434
2435 QualType Ty = CGM.getContext().getRecordType(RD);
2436 llvm::DIType *T = getTypeOrNull(Ty);
2437 if (T && T->isForwardDecl())
2438 completeClassData(RD);
2439}
2440
2441llvm::DIType *CGDebugInfo::CreateType(const RecordType *Ty) {
2442 RecordDecl *RD = Ty->getDecl();
2443 llvm::DIType *T = cast_or_null<llvm::DIType>(getTypeOrNull(QualType(Ty, 0)));
2444 if (T || shouldOmitDefinition(DebugKind, DebugTypeExtRefs, RD,
2445 CGM.getLangOpts())) {
2446 if (!T)
2447 T = getOrCreateRecordFwdDecl(Ty, getDeclContextDescriptor(RD));
2448 return T;
2449 }
2450
2451 return CreateTypeDefinition(Ty);
2452}
2453
2454llvm::DIType *CGDebugInfo::CreateTypeDefinition(const RecordType *Ty) {
2455 RecordDecl *RD = Ty->getDecl();
2456
2457 // Get overall information about the record type for the debug info.
2458 llvm::DIFile *DefUnit = getOrCreateFile(RD->getLocation());
2459
2460 // Records and classes and unions can all be recursive. To handle them, we
2461 // first generate a debug descriptor for the struct as a forward declaration.
2462 // Then (if it is a definition) we go through and get debug info for all of
2463 // its members. Finally, we create a descriptor for the complete type (which
2464 // may refer to the forward decl if the struct is recursive) and replace all
2465 // uses of the forward declaration with the final definition.
2466 llvm::DICompositeType *FwdDecl = getOrCreateLimitedType(Ty);
2467
2468 const RecordDecl *D = RD->getDefinition();
2469 if (!D || !D->isCompleteDefinition())
2470 return FwdDecl;
2471
2472 if (const auto *CXXDecl = dyn_cast<CXXRecordDecl>(RD))
2473 CollectContainingType(CXXDecl, FwdDecl);
2474
2475 // Push the struct on region stack.
2476 LexicalBlockStack.emplace_back(&*FwdDecl);
2477 RegionMap[Ty->getDecl()].reset(FwdDecl);
2478
2479 // Convert all the elements.
2480 SmallVector<llvm::Metadata *, 16> EltTys;
2481 // what about nested types?
2482
2483 // Note: The split of CXXDecl information here is intentional, the
2484 // gdb tests will depend on a certain ordering at printout. The debug
2485 // information offsets are still correct if we merge them all together
2486 // though.
2487 const auto *CXXDecl = dyn_cast<CXXRecordDecl>(RD);
2488 if (CXXDecl) {
2489 CollectCXXBases(CXXDecl, DefUnit, EltTys, FwdDecl);
2490 CollectVTableInfo(CXXDecl, DefUnit, EltTys);
2491 }
2492
2493 // Collect data fields (including static variables and any initializers).
2494 CollectRecordFields(RD, DefUnit, EltTys, FwdDecl);
2495 if (CXXDecl)
2496 CollectCXXMemberFunctions(CXXDecl, DefUnit, EltTys, FwdDecl);
2497
2498 LexicalBlockStack.pop_back();
2499 RegionMap.erase(Ty->getDecl());
2500
2501 llvm::DINodeArray Elements = DBuilder.getOrCreateArray(EltTys);
2502 DBuilder.replaceArrays(FwdDecl, Elements);
2503
2504 if (FwdDecl->isTemporary())
2505 FwdDecl =
2506 llvm::MDNode::replaceWithPermanent(llvm::TempDICompositeType(FwdDecl));
2507
2508 RegionMap[Ty->getDecl()].reset(FwdDecl);
2509 return FwdDecl;
2510}
2511
2512llvm::DIType *CGDebugInfo::CreateType(const ObjCObjectType *Ty,
2513 llvm::DIFile *Unit) {
2514 // Ignore protocols.
2515 return getOrCreateType(Ty->getBaseType(), Unit);
2516}
2517
2518llvm::DIType *CGDebugInfo::CreateType(const ObjCTypeParamType *Ty,
2519 llvm::DIFile *Unit) {
2520 // Ignore protocols.
2521 SourceLocation Loc = Ty->getDecl()->getLocation();
2522
2523 // Use Typedefs to represent ObjCTypeParamType.
2524 return DBuilder.createTypedef(
2525 getOrCreateType(Ty->getDecl()->getUnderlyingType(), Unit),
2526 Ty->getDecl()->getName(), getOrCreateFile(Loc), getLineNumber(Loc),
2527 getDeclContextDescriptor(Ty->getDecl()));
2528}
2529
2530/// \return true if Getter has the default name for the property PD.
2531static bool hasDefaultGetterName(const ObjCPropertyDecl *PD,
2532 const ObjCMethodDecl *Getter) {
2533 assert(PD)((PD) ? static_cast<void> (0) : __assert_fail ("PD", "/build/llvm-toolchain-snapshot-13~++20210405022414+5f57793c4fe4/clang/lib/CodeGen/CGDebugInfo.cpp"
, 2533, __PRETTY_FUNCTION__))
;
2534 if (!Getter)
2535 return true;
2536
2537 assert(Getter->getDeclName().isObjCZeroArgSelector())((Getter->getDeclName().isObjCZeroArgSelector()) ? static_cast
<void> (0) : __assert_fail ("Getter->getDeclName().isObjCZeroArgSelector()"
, "/build/llvm-toolchain-snapshot-13~++20210405022414+5f57793c4fe4/clang/lib/CodeGen/CGDebugInfo.cpp"
, 2537, __PRETTY_FUNCTION__))
;
2538 return PD->getName() ==
2539 Getter->getDeclName().getObjCSelector().getNameForSlot(0);
2540}
2541
2542/// \return true if Setter has the default name for the property PD.
2543static bool hasDefaultSetterName(const ObjCPropertyDecl *PD,
2544 const ObjCMethodDecl *Setter) {
2545 assert(PD)((PD) ? static_cast<void> (0) : __assert_fail ("PD", "/build/llvm-toolchain-snapshot-13~++20210405022414+5f57793c4fe4/clang/lib/CodeGen/CGDebugInfo.cpp"
, 2545, __PRETTY_FUNCTION__))
;
2546 if (!Setter)
2547 return true;
2548
2549 assert(Setter->getDeclName().isObjCOneArgSelector())((Setter->getDeclName().isObjCOneArgSelector()) ? static_cast
<void> (0) : __assert_fail ("Setter->getDeclName().isObjCOneArgSelector()"
, "/build/llvm-toolchain-snapshot-13~++20210405022414+5f57793c4fe4/clang/lib/CodeGen/CGDebugInfo.cpp"
, 2549, __PRETTY_FUNCTION__))
;
2550 return SelectorTable::constructSetterName(PD->getName()) ==
2551 Setter->getDeclName().getObjCSelector().getNameForSlot(0);
2552}
2553
2554llvm::DIType *CGDebugInfo::CreateType(const ObjCInterfaceType *Ty,
2555 llvm::DIFile *Unit) {
2556 ObjCInterfaceDecl *ID = Ty->getDecl();
2557 if (!ID)
2558 return nullptr;
2559
2560 // Return a forward declaration if this type was imported from a clang module,
2561 // and this is not the compile unit with the implementation of the type (which
2562 // may contain hidden ivars).
2563 if (DebugTypeExtRefs && ID->isFromASTFile() && ID->getDefinition() &&
2564 !ID->getImplementation())
2565 return DBuilder.createForwardDecl(llvm::dwarf::DW_TAG_structure_type,
2566 ID->getName(),
2567 getDeclContextDescriptor(ID), Unit, 0);
2568
2569 // Get overall information about the record type for the debug info.
2570 llvm::DIFile *DefUnit = getOrCreateFile(ID->getLocation());
2571 unsigned Line = getLineNumber(ID->getLocation());
2572 auto RuntimeLang =
2573 static_cast<llvm::dwarf::SourceLanguage>(TheCU->getSourceLanguage());
2574
2575 // If this is just a forward declaration return a special forward-declaration
2576 // debug type since we won't be able to lay out the entire type.
2577 ObjCInterfaceDecl *Def = ID->getDefinition();
2578 if (!Def || !Def->getImplementation()) {
2579 llvm::DIScope *Mod = getParentModuleOrNull(ID);
2580 llvm::DIType *FwdDecl = DBuilder.createReplaceableCompositeType(
2581 llvm::dwarf::DW_TAG_structure_type, ID->getName(), Mod ? Mod : TheCU,
2582 DefUnit, Line, RuntimeLang);
2583 ObjCInterfaceCache.push_back(ObjCInterfaceCacheEntry(Ty, FwdDecl, Unit));
2584 return FwdDecl;
2585 }
2586
2587 return CreateTypeDefinition(Ty, Unit);
2588}
2589
2590llvm::DIModule *CGDebugInfo::getOrCreateModuleRef(ASTSourceDescriptor Mod,
2591 bool CreateSkeletonCU) {
2592 // Use the Module pointer as the key into the cache. This is a
2593 // nullptr if the "Module" is a PCH, which is safe because we don't
2594 // support chained PCH debug info, so there can only be a single PCH.
2595 const Module *M = Mod.getModuleOrNull();
2596 auto ModRef = ModuleCache.find(M);
2597 if (ModRef != ModuleCache.end())
2598 return cast<llvm::DIModule>(ModRef->second);
2599
2600 // Macro definitions that were defined with "-D" on the command line.
2601 SmallString<128> ConfigMacros;
2602 {
2603 llvm::raw_svector_ostream OS(ConfigMacros);
2604 const auto &PPOpts = CGM.getPreprocessorOpts();
2605 unsigned I = 0;
2606 // Translate the macro definitions back into a command line.
2607 for (auto &M : PPOpts.Macros) {
2608 if (++I > 1)
2609 OS << " ";
2610 const std::string &Macro = M.first;
2611 bool Undef = M.second;
2612 OS << "\"-" << (Undef ? 'U' : 'D');
2613 for (char c : Macro)
2614 switch (c) {
2615 case '\\':
2616 OS << "\\\\";
2617 break;
2618 case '"':
2619 OS << "\\\"";
2620 break;
2621 default:
2622 OS << c;
2623 }
2624 OS << '\"';
2625 }
2626 }
2627
2628 bool IsRootModule = M ? !M->Parent : true;
2629 // When a module name is specified as -fmodule-name, that module gets a
2630 // clang::Module object, but it won't actually be built or imported; it will
2631 // be textual.
2632 if (CreateSkeletonCU && IsRootModule && Mod.getASTFile().empty() && M)
2633 assert(StringRef(M->Name).startswith(CGM.getLangOpts().ModuleName) &&((StringRef(M->Name).startswith(CGM.getLangOpts().ModuleName
) && "clang module without ASTFile must be specified by -fmodule-name"
) ? static_cast<void> (0) : __assert_fail ("StringRef(M->Name).startswith(CGM.getLangOpts().ModuleName) && \"clang module without ASTFile must be specified by -fmodule-name\""
, "/build/llvm-toolchain-snapshot-13~++20210405022414+5f57793c4fe4/clang/lib/CodeGen/CGDebugInfo.cpp"
, 2634, __PRETTY_FUNCTION__))
2634 "clang module without ASTFile must be specified by -fmodule-name")((StringRef(M->Name).startswith(CGM.getLangOpts().ModuleName
) && "clang module without ASTFile must be specified by -fmodule-name"
) ? static_cast<void> (0) : __assert_fail ("StringRef(M->Name).startswith(CGM.getLangOpts().ModuleName) && \"clang module without ASTFile must be specified by -fmodule-name\""
, "/build/llvm-toolchain-snapshot-13~++20210405022414+5f57793c4fe4/clang/lib/CodeGen/CGDebugInfo.cpp"
, 2634, __PRETTY_FUNCTION__))
;
2635
2636 // Return a StringRef to the remapped Path.
2637 auto RemapPath = [this](StringRef Path) -> std::string {
2638 std::string Remapped = remapDIPath(Path);
2639 StringRef Relative(Remapped);
2640 StringRef CompDir = TheCU->getDirectory();
2641 if (Relative.consume_front(CompDir))
2642 Relative.consume_front(llvm::sys::path::get_separator());
2643
2644 return Relative.str();
2645 };
2646
2647 if (CreateSkeletonCU && IsRootModule && !Mod.getASTFile().empty()) {
2648 // PCH files don't have a signature field in the control block,
2649 // but LLVM detects skeleton CUs by looking for a non-zero DWO id.
2650 // We use the lower 64 bits for debug info.
2651
2652 uint64_t Signature = 0;
2653 if (const auto &ModSig = Mod.getSignature())
2654 Signature = ModSig.truncatedValue();
2655 else
2656 Signature = ~1ULL;
2657
2658 llvm::DIBuilder DIB(CGM.getModule());
2659 SmallString<0> PCM;
2660 if (!llvm::sys::path::is_absolute(Mod.getASTFile()))
2661 PCM = Mod.getPath();
2662 llvm::sys::path::append(PCM, Mod.getASTFile());
2663 DIB.createCompileUnit(
2664 TheCU->getSourceLanguage(),
2665 // TODO: Support "Source" from external AST providers?
2666 DIB.createFile(Mod.getModuleName(), TheCU->getDirectory()),
2667 TheCU->getProducer(), false, StringRef(), 0, RemapPath(PCM),
2668 llvm::DICompileUnit::FullDebug, Signature);
2669 DIB.finalize();
2670 }
2671
2672 llvm::DIModule *Parent =
2673 IsRootModule ? nullptr
2674 : getOrCreateModuleRef(ASTSourceDescriptor(*M->Parent),
2675 CreateSkeletonCU);
2676 std::string IncludePath = Mod.getPath().str();
2677 llvm::DIModule *DIMod =
2678 DBuilder.createModule(Parent, Mod.getModuleName(), ConfigMacros,
2679 RemapPath(IncludePath));
2680 ModuleCache[M].reset(DIMod);
2681 return DIMod;
2682}
2683
2684llvm::DIType *CGDebugInfo::CreateTypeDefinition(const ObjCInterfaceType *Ty,
2685 llvm::DIFile *Unit) {
2686 ObjCInterfaceDecl *ID = Ty->getDecl();
2687 llvm::DIFile *DefUnit = getOrCreateFile(ID->getLocation());
2688 unsigned Line = getLineNumber(ID->getLocation());
2689 unsigned RuntimeLang = TheCU->getSourceLanguage();
2690
2691 // Bit size, align and offset of the type.
2692 uint64_t Size = CGM.getContext().getTypeSize(Ty);
2693 auto Align = getTypeAlignIfRequired(Ty, CGM.getContext());
2694
2695 llvm::DINode::DIFlags Flags = llvm::DINode::FlagZero;
2696 if (ID->getImplementation())
2697 Flags |= llvm::DINode::FlagObjcClassComplete;
2698
2699 llvm::DIScope *Mod = getParentModuleOrNull(ID);
2700 llvm::DICompositeType *RealDecl = DBuilder.createStructType(
2701 Mod ? Mod : Unit, ID->getName(), DefUnit, Line, Size, Align, Flags,
2702 nullptr, llvm::DINodeArray(), RuntimeLang);
2703
2704 QualType QTy(Ty, 0);
2705 TypeCache[QTy.getAsOpaquePtr()].reset(RealDecl);
2706
2707 // Push the struct on region stack.
2708 LexicalBlockStack.emplace_back(RealDecl);
2709 RegionMap[Ty->getDecl()].reset(RealDecl);
2710
2711 // Convert all the elements.
2712 SmallVector<llvm::Metadata *, 16> EltTys;
2713
2714 ObjCInterfaceDecl *SClass = ID->getSuperClass();
2715 if (SClass) {
2716 llvm::DIType *SClassTy =
2717 getOrCreateType(CGM.getContext().getObjCInterfaceType(SClass), Unit);
2718 if (!SClassTy)
2719 return nullptr;
2720
2721 llvm::DIType *InhTag = DBuilder.createInheritance(RealDecl, SClassTy, 0, 0,
2722 llvm::DINode::FlagZero);
2723 EltTys.push_back(InhTag);
2724 }
2725
2726 // Create entries for all of the properties.
2727 auto AddProperty = [&](const ObjCPropertyDecl *PD) {
2728 SourceLocation Loc = PD->getLocation();
2729 llvm::DIFile *PUnit = getOrCreateFile(Loc);
2730 unsigned PLine = getLineNumber(Loc);
2731 ObjCMethodDecl *Getter = PD->getGetterMethodDecl();
2732 ObjCMethodDecl *Setter = PD->getSetterMethodDecl();
2733 llvm::MDNode *PropertyNode = DBuilder.createObjCProperty(
2734 PD->getName(), PUnit, PLine,
2735 hasDefaultGetterName(PD, Getter) ? ""
2736 : getSelectorName(PD->getGetterName()),
2737 hasDefaultSetterName(PD, Setter) ? ""
2738 : getSelectorName(PD->getSetterName()),
2739 PD->getPropertyAttributes(), getOrCreateType(PD->getType(), PUnit));
2740 EltTys.push_back(PropertyNode);
2741 };
2742 {
2743 // Use 'char' for the isClassProperty bit as DenseSet requires space for
2744 // empty/tombstone keys in the data type (and bool is too small for that).
2745 typedef std::pair<char, const IdentifierInfo *> IsClassAndIdent;
2746 /// List of already emitted properties. Two distinct class and instance
2747 /// properties can share the same identifier (but not two instance
2748 /// properties or two class properties).
2749 llvm::DenseSet<IsClassAndIdent> PropertySet;
2750 /// Returns the IsClassAndIdent key for the given property.
2751 auto GetIsClassAndIdent = [](const ObjCPropertyDecl *PD) {
2752 return std::make_pair(PD->isClassProperty(), PD->getIdentifier());
2753 };
2754 for (const ObjCCategoryDecl *ClassExt : ID->known_extensions())
2755 for (auto *PD : ClassExt->properties()) {
2756 PropertySet.insert(GetIsClassAndIdent(PD));
2757 AddProperty(PD);
2758 }
2759 for (const auto *PD : ID->properties()) {
2760 // Don't emit duplicate metadata for properties that were already in a
2761 // class extension.
2762 if (!PropertySet.insert(GetIsClassAndIdent(PD)).second)
2763 continue;
2764 AddProperty(PD);
2765 }
2766 }
2767
2768 const ASTRecordLayout &RL = CGM.getContext().getASTObjCInterfaceLayout(ID);
2769 unsigned FieldNo = 0;
2770 for (ObjCIvarDecl *Field = ID->all_declared_ivar_begin(); Field;
2771 Field = Field->getNextIvar(), ++FieldNo) {
2772 llvm::DIType *FieldTy = getOrCreateType(Field->getType(), Unit);
2773 if (!FieldTy)
2774 return nullptr;
2775
2776 StringRef FieldName = Field->getName();
2777
2778 // Ignore unnamed fields.
2779 if (FieldName.empty())
2780 continue;
2781
2782 // Get the location for the field.
2783 llvm::DIFile *FieldDefUnit = getOrCreateFile(Field->getLocation());
2784 unsigned FieldLine = getLineNumber(Field->getLocation());
2785 QualType FType = Field->getType();
2786 uint64_t FieldSize = 0;
2787 uint32_t FieldAlign = 0;
2788
2789 if (!FType->isIncompleteArrayType()) {
2790
2791 // Bit size, align and offset of the type.
2792 FieldSize = Field->isBitField()
2793 ? Field->getBitWidthValue(CGM.getContext())
2794 : CGM.getContext().getTypeSize(FType);
2795 FieldAlign = getTypeAlignIfRequired(FType, CGM.getContext());
2796 }
2797
2798 uint64_t FieldOffset;
2799 if (CGM.getLangOpts().ObjCRuntime.isNonFragile()) {
2800 // We don't know the runtime offset of an ivar if we're using the
2801 // non-fragile ABI. For bitfields, use the bit offset into the first
2802 // byte of storage of the bitfield. For other fields, use zero.
2803 if (Field->isBitField()) {
2804 FieldOffset =
2805 CGM.getObjCRuntime().ComputeBitfieldBitOffset(CGM, ID, Field);
2806 FieldOffset %= CGM.getContext().getCharWidth();
2807 } else {
2808 FieldOffset = 0;
2809 }
2810 } else {
2811 FieldOffset = RL.getFieldOffset(FieldNo);
2812 }
2813
2814 llvm::DINode::DIFlags Flags = llvm::DINode::FlagZero;
2815 if (Field->getAccessControl() == ObjCIvarDecl::Protected)
2816 Flags = llvm::DINode::FlagProtected;
2817 else if (Field->getAccessControl() == ObjCIvarDecl::Private)
2818 Flags = llvm::DINode::FlagPrivate;
2819 else if (Field->getAccessControl() == ObjCIvarDecl::Public)
2820 Flags = llvm::DINode::FlagPublic;
2821
2822 llvm::MDNode *PropertyNode = nullptr;
2823 if (ObjCImplementationDecl *ImpD = ID->getImplementation()) {
2824 if (ObjCPropertyImplDecl *PImpD =
2825 ImpD->FindPropertyImplIvarDecl(Field->getIdentifier())) {
2826 if (ObjCPropertyDecl *PD = PImpD->getPropertyDecl()) {
2827 SourceLocation Loc = PD->getLocation();
2828 llvm::DIFile *PUnit = getOrCreateFile(Loc);
2829 unsigned PLine = getLineNumber(Loc);
2830 ObjCMethodDecl *Getter = PImpD->getGetterMethodDecl();
2831 ObjCMethodDecl *Setter = PImpD->getSetterMethodDecl();
2832 PropertyNode = DBuilder.createObjCProperty(
2833 PD->getName(), PUnit, PLine,
2834 hasDefaultGetterName(PD, Getter)
2835 ? ""
2836 : getSelectorName(PD->getGetterName()),
2837 hasDefaultSetterName(PD, Setter)
2838 ? ""
2839 : getSelectorName(PD->getSetterName()),
2840 PD->getPropertyAttributes(),
2841 getOrCreateType(PD->getType(), PUnit));
2842 }
2843 }
2844 }
2845 FieldTy = DBuilder.createObjCIVar(FieldName, FieldDefUnit, FieldLine,
2846 FieldSize, FieldAlign, FieldOffset, Flags,
2847 FieldTy, PropertyNode);
2848 EltTys.push_back(FieldTy);
2849 }
2850
2851 llvm::DINodeArray Elements = DBuilder.getOrCreateArray(EltTys);
2852 DBuilder.replaceArrays(RealDecl, Elements);
2853
2854 LexicalBlockStack.pop_back();
2855 return RealDecl;
2856}
2857
2858llvm::DIType *CGDebugInfo::CreateType(const VectorType *Ty,
2859 llvm::DIFile *Unit) {
2860 llvm::DIType *ElementTy = getOrCreateType(Ty->getElementType(), Unit);
2861 int64_t Count = Ty->getNumElements();
2862
2863 llvm::Metadata *Subscript;
2864 QualType QTy(Ty, 0);
2865 auto SizeExpr = SizeExprCache.find(QTy);
2866 if (SizeExpr != SizeExprCache.end())
2867 Subscript = DBuilder.getOrCreateSubrange(
2868 SizeExpr->getSecond() /*count*/, nullptr /*lowerBound*/,
2869 nullptr /*upperBound*/, nullptr /*stride*/);
2870 else {
2871 auto *CountNode =
2872 llvm::ConstantAsMetadata::get(llvm::ConstantInt::getSigned(
2873 llvm::Type::getInt64Ty(CGM.getLLVMContext()), Count ? Count : -1));
2874 Subscript = DBuilder.getOrCreateSubrange(
2875 CountNode /*count*/, nullptr /*lowerBound*/, nullptr /*upperBound*/,
2876 nullptr /*stride*/);
2877 }
2878 llvm::DINodeArray SubscriptArray = DBuilder.getOrCreateArray(Subscript);
2879
2880 uint64_t Size = CGM.getContext().getTypeSize(Ty);
2881 auto Align = getTypeAlignIfRequired(Ty, CGM.getContext());
2882
2883 return DBuilder.createVectorType(Size, Align, ElementTy, SubscriptArray);
2884}
2885
2886llvm::DIType *CGDebugInfo::CreateType(const ConstantMatrixType *Ty,
2887 llvm::DIFile *Unit) {
2888 // FIXME: Create another debug type for matrices
2889 // For the time being, it treats it like a nested ArrayType.
2890
2891 llvm::DIType *ElementTy = getOrCreateType(Ty->getElementType(), Unit);
2892 uint64_t Size = CGM.getContext().getTypeSize(Ty);
2893 uint32_t Align = getTypeAlignIfRequired(Ty, CGM.getContext());
2894
2895 // Create ranges for both dimensions.
2896 llvm::SmallVector<llvm::Metadata *, 2> Subscripts;
2897 auto *ColumnCountNode =
2898 llvm::ConstantAsMetadata::get(llvm::ConstantInt::getSigned(
2899 llvm::Type::getInt64Ty(CGM.getLLVMContext()), Ty->getNumColumns()));
2900 auto *RowCountNode =
2901 llvm::ConstantAsMetadata::get(llvm::ConstantInt::getSigned(
2902 llvm::Type::getInt64Ty(CGM.getLLVMContext()), Ty->getNumRows()));
2903 Subscripts.push_back(DBuilder.getOrCreateSubrange(
2904 ColumnCountNode /*count*/, nullptr /*lowerBound*/, nullptr /*upperBound*/,
2905 nullptr /*stride*/));
2906 Subscripts.push_back(DBuilder.getOrCreateSubrange(
2907 RowCountNode /*count*/, nullptr /*lowerBound*/, nullptr /*upperBound*/,
2908 nullptr /*stride*/));
2909 llvm::DINodeArray SubscriptArray = DBuilder.getOrCreateArray(Subscripts);
2910 return DBuilder.createArrayType(Size, Align, ElementTy, SubscriptArray);
2911}
2912
2913llvm::DIType *CGDebugInfo::CreateType(const ArrayType *Ty, llvm::DIFile *Unit) {
2914 uint64_t Size;
2915 uint32_t Align;
2916
2917 // FIXME: make getTypeAlign() aware of VLAs and incomplete array types
2918 if (const auto *VAT = dyn_cast<VariableArrayType>(Ty)) {
2919 Size = 0;
2920 Align = getTypeAlignIfRequired(CGM.getContext().getBaseElementType(VAT),
2921 CGM.getContext());
2922 } else if (Ty->isIncompleteArrayType()) {
2923 Size = 0;
2924 if (Ty->getElementType()->isIncompleteType())
2925 Align = 0;
2926 else
2927 Align = getTypeAlignIfRequired(Ty->getElementType(), CGM.getContext());
2928 } else if (Ty->isIncompleteType()) {
2929 Size = 0;
2930 Align = 0;
2931 } else {
2932 // Size and align of the whole array, not the element type.
2933 Size = CGM.getContext().getTypeSize(Ty);
2934 Align = getTypeAlignIfRequired(Ty, CGM.getContext());
2935 }
2936
2937 // Add the dimensions of the array. FIXME: This loses CV qualifiers from
2938 // interior arrays, do we care? Why aren't nested arrays represented the
2939 // obvious/recursive way?
2940 SmallVector<llvm::Metadata *, 8> Subscripts;
2941 QualType EltTy(Ty, 0);
2942 while ((Ty = dyn_cast<ArrayType>(EltTy))) {
2943 // If the number of elements is known, then count is that number. Otherwise,
2944 // it's -1. This allows us to represent a subrange with an array of 0
2945 // elements, like this:
2946 //
2947 // struct foo {
2948 // int x[0];
2949 // };
2950 int64_t Count = -1; // Count == -1 is an unbounded array.
2951 if (const auto *CAT = dyn_cast<ConstantArrayType>(Ty))
2952 Count = CAT->getSize().getZExtValue();
2953 else if (const auto *VAT = dyn_cast<VariableArrayType>(Ty)) {
2954 if (Expr *Size = VAT->getSizeExpr()) {
2955 Expr::EvalResult Result;
2956 if (Size->EvaluateAsInt(Result, CGM.getContext()))
2957 Count = Result.Val.getInt().getExtValue();
2958 }
2959 }
2960
2961 auto SizeNode = SizeExprCache.find(EltTy);
2962 if (SizeNode != SizeExprCache.end())
2963 Subscripts.push_back(DBuilder.getOrCreateSubrange(
2964 SizeNode->getSecond() /*count*/, nullptr /*lowerBound*/,
2965 nullptr /*upperBound*/, nullptr /*stride*/));
2966 else {
2967 auto *CountNode =
2968 llvm::ConstantAsMetadata::get(llvm::ConstantInt::getSigned(
2969 llvm::Type::getInt64Ty(CGM.getLLVMContext()), Count));
2970 Subscripts.push_back(DBuilder.getOrCreateSubrange(
2971 CountNode /*count*/, nullptr /*lowerBound*/, nullptr /*upperBound*/,
2972 nullptr /*stride*/));
2973 }
2974 EltTy = Ty->getElementType();
2975 }
2976
2977 llvm::DINodeArray SubscriptArray = DBuilder.getOrCreateArray(Subscripts);
2978
2979 return DBuilder.createArrayType(Size, Align, getOrCreateType(EltTy, Unit),
2980 SubscriptArray);
2981}
2982
2983llvm::DIType *CGDebugInfo::CreateType(const LValueReferenceType *Ty,
2984 llvm::DIFile *Unit) {
2985 return CreatePointerLikeType(llvm::dwarf::DW_TAG_reference_type, Ty,
2986 Ty->getPointeeType(), Unit);
2987}
2988
2989llvm::DIType *CGDebugInfo::CreateType(const RValueReferenceType *Ty,
2990 llvm::DIFile *Unit) {
2991 return CreatePointerLikeType(llvm::dwarf::DW_TAG_rvalue_reference_type, Ty,
2992 Ty->getPointeeType(), Unit);
2993}
2994
2995llvm::DIType *CGDebugInfo::CreateType(const MemberPointerType *Ty,
2996 llvm::DIFile *U) {
2997 llvm::DINode::DIFlags Flags = llvm::DINode::FlagZero;
2998 uint64_t Size = 0;
2999
3000 if (!Ty->isIncompleteType()) {
10
Assuming the condition is false
11
Taking false branch
3001 Size = CGM.getContext().getTypeSize(Ty);
3002
3003 // Set the MS inheritance model. There is no flag for the unspecified model.
3004 if (CGM.getTarget().getCXXABI().isMicrosoft()) {
3005 switch (Ty->getMostRecentCXXRecordDecl()->getMSInheritanceModel()) {
3006 case MSInheritanceModel::Single:
3007 Flags |= llvm::DINode::FlagSingleInheritance;
3008 break;
3009 case MSInheritanceModel::Multiple:
3010 Flags |= llvm::DINode::FlagMultipleInheritance;
3011 break;
3012 case MSInheritanceModel::Virtual:
3013 Flags |= llvm::DINode::FlagVirtualInheritance;
3014 break;
3015 case MSInheritanceModel::Unspecified:
3016 break;
3017 }
3018 }
3019 }
3020
3021 llvm::DIType *ClassType = getOrCreateType(QualType(Ty->getClass(), 0), U);
3022 if (Ty->isMemberDataPointerType())
12
Calling 'Type::isMemberDataPointerType'
16
Returning from 'Type::isMemberDataPointerType'
17
Taking false branch
3023 return DBuilder.createMemberPointerType(
3024 getOrCreateType(Ty->getPointeeType(), U), ClassType, Size, /*Align=*/0,
3025 Flags);
3026
3027 const FunctionProtoType *FPT =
19
'FPT' initialized to a null pointer value
3028 Ty->getPointeeType()->getAs<FunctionProtoType>();
18
Assuming the object is not a 'FunctionProtoType'
3029 return DBuilder.createMemberPointerType(
3030 getOrCreateInstanceMethodType(
21
Calling 'CGDebugInfo::getOrCreateInstanceMethodType'
3031 CXXMethodDecl::getThisType(FPT, Ty->getMostRecentCXXRecordDecl()),
3032 FPT, U, false),
20
Passing null pointer value via 2nd parameter 'Func'
3033 ClassType, Size, /*Align=*/0, Flags);
3034}
3035
3036llvm::DIType *CGDebugInfo::CreateType(const AtomicType *Ty, llvm::DIFile *U) {
3037 auto *FromTy = getOrCreateType(Ty->getValueType(), U);
3038 return DBuilder.createQualifiedType(llvm::dwarf::DW_TAG_atomic_type, FromTy);
3039}
3040
3041llvm::DIType *CGDebugInfo::CreateType(const PipeType *Ty, llvm::DIFile *U) {
3042 return getOrCreateType(Ty->getElementType(), U);
3043}
3044
3045llvm::DIType *CGDebugInfo::CreateEnumType(const EnumType *Ty) {
3046 const EnumDecl *ED = Ty->getDecl();
3047
3048 uint64_t Size = 0;
3049 uint32_t Align = 0;
3050 if (!ED->getTypeForDecl()->isIncompleteType()) {
3051 Size = CGM.getContext().getTypeSize(ED->getTypeForDecl());
3052 Align = getDeclAlignIfRequired(ED, CGM.getContext());
3053 }
3054
3055 SmallString<256> Identifier = getTypeIdentifier(Ty, CGM, TheCU);
3056
3057 bool isImportedFromModule =
3058 DebugTypeExtRefs && ED->isFromASTFile() && ED->getDefinition();
3059
3060 // If this is just a forward declaration, construct an appropriately
3061 // marked node and just return it.
3062 if (isImportedFromModule || !ED->getDefinition()) {
3063 // Note that it is possible for enums to be created as part of
3064 // their own declcontext. In this case a FwdDecl will be created
3065 // twice. This doesn't cause a problem because both FwdDecls are
3066 // entered into the ReplaceMap: finalize() will replace the first
3067 // FwdDecl with the second and then replace the second with
3068 // complete type.
3069 llvm::DIScope *EDContext = getDeclContextDescriptor(ED);
3070 llvm::DIFile *DefUnit = getOrCreateFile(ED->getLocation());
3071 llvm::TempDIScope TmpContext(DBuilder.createReplaceableCompositeType(
3072 llvm::dwarf::DW_TAG_enumeration_type, "", TheCU, DefUnit, 0));
3073
3074 unsigned Line = getLineNumber(ED->getLocation());
3075 StringRef EDName = ED->getName();
3076 llvm::DIType *RetTy = DBuilder.createReplaceableCompositeType(
3077 llvm::dwarf::DW_TAG_enumeration_type, EDName, EDContext, DefUnit, Line,
3078 0, Size, Align, llvm::DINode::FlagFwdDecl, Identifier);
3079
3080 ReplaceMap.emplace_back(
3081 std::piecewise_construct, std::make_tuple(Ty),
3082 std::make_tuple(static_cast<llvm::Metadata *>(RetTy)));
3083 return RetTy;
3084 }
3085
3086 return CreateTypeDefinition(Ty);
3087}
3088
3089llvm::DIType *CGDebugInfo::CreateTypeDefinition(const EnumType *Ty) {
3090 const EnumDecl *ED = Ty->getDecl();
3091 uint64_t Size = 0;
3092 uint32_t Align = 0;
3093 if (!ED->getTypeForDecl()->isIncompleteType()) {
3094 Size = CGM.getContext().getTypeSize(ED->getTypeForDecl());
3095 Align = getDeclAlignIfRequired(ED, CGM.getContext());
3096 }
3097
3098 SmallString<256> Identifier = getTypeIdentifier(Ty, CGM, TheCU);
3099
3100 // Create elements for each enumerator.
3101 SmallVector<llvm::Metadata *, 16> Enumerators;
3102 ED = ED->getDefinition();
3103 bool IsSigned = ED->getIntegerType()->isSignedIntegerType();
3104 for (const auto *Enum : ED->enumerators()) {
3105 const auto &InitVal = Enum->getInitVal();
3106 auto Value = IsSigned ? InitVal.getSExtValue() : InitVal.getZExtValue();
3107 Enumerators.push_back(
3108 DBuilder.createEnumerator(Enum->getName(), Value, !IsSigned));
3109 }
3110
3111 // Return a CompositeType for the enum itself.
3112 llvm::DINodeArray EltArray = DBuilder.getOrCreateArray(Enumerators);
3113
3114 llvm::DIFile *DefUnit = getOrCreateFile(ED->getLocation());
3115 unsigned Line = getLineNumber(ED->getLocation());
3116 llvm::DIScope *EnumContext = getDeclContextDescriptor(ED);
3117 llvm::DIType *ClassTy = getOrCreateType(ED->getIntegerType(), DefUnit);
3118 return DBuilder.createEnumerationType(EnumContext, ED->getName(), DefUnit,
3119 Line, Size, Align, EltArray, ClassTy,
3120 Identifier, ED->isScoped());
3121}
3122
3123llvm::DIMacro *CGDebugInfo::CreateMacro(llvm::DIMacroFile *Parent,
3124 unsigned MType, SourceLocation LineLoc,
3125 StringRef Name, StringRef Value) {
3126 unsigned Line = LineLoc.isInvalid() ? 0 : getLineNumber(LineLoc);
3127 return DBuilder.createMacro(Parent, Line, MType, Name, Value);
3128}
3129
3130llvm::DIMacroFile *CGDebugInfo::CreateTempMacroFile(llvm::DIMacroFile *Parent,
3131 SourceLocation LineLoc,
3132 SourceLocation FileLoc) {
3133 llvm::DIFile *FName = getOrCreateFile(FileLoc);
3134 unsigned Line = LineLoc.isInvalid() ? 0 : getLineNumber(LineLoc);
3135 return DBuilder.createTempMacroFile(Parent, Line, FName);
3136}
3137
3138static QualType UnwrapTypeForDebugInfo(QualType T, const ASTContext &C) {
3139 Qualifiers Quals;
3140 do {
3141 Qualifiers InnerQuals = T.getLocalQualifiers();
3142 // Qualifiers::operator+() doesn't like it if you add a Qualifier
3143 // that is already there.
3144 Quals += Qualifiers::removeCommonQualifiers(Quals, InnerQuals);
3145 Quals += InnerQuals;
3146 QualType LastT = T;
3147 switch (T->getTypeClass()) {
3148 default:
3149 return C.getQualifiedType(T.getTypePtr(), Quals);
3150 case Type::TemplateSpecialization: {
3151 const auto *Spec = cast<TemplateSpecializationType>(T);
3152 if (Spec->isTypeAlias())
3153 return C.getQualifiedType(T.getTypePtr(), Quals);
3154 T = Spec->desugar();
3155 break;
3156 }
3157 case Type::TypeOfExpr:
3158 T = cast<TypeOfExprType>(T)->getUnderlyingExpr()->getType();
3159 break;
3160 case Type::TypeOf:
3161 T = cast<TypeOfType>(T)->getUnderlyingType();
3162 break;
3163 case Type::Decltype:
3164 T = cast<DecltypeType>(T)->getUnderlyingType();
3165 break;
3166 case Type::UnaryTransform:
3167 T = cast<UnaryTransformType>(T)->getUnderlyingType();
3168 break;
3169 case Type::Attributed:
3170 T = cast<AttributedType>(T)->getEquivalentType();
3171 break;
3172 case Type::Elaborated:
3173 T = cast<ElaboratedType>(T)->getNamedType();
3174 break;
3175 case Type::Paren:
3176 T = cast<ParenType>(T)->getInnerType();
3177 break;
3178 case Type::MacroQualified:
3179 T = cast<MacroQualifiedType>(T)->getUnderlyingType();
3180 break;
3181 case Type::SubstTemplateTypeParm:
3182 T = cast<SubstTemplateTypeParmType>(T)->getReplacementType();
3183 break;
3184 case Type::Auto:
3185 case Type::DeducedTemplateSpecialization: {
3186 QualType DT = cast<DeducedType>(T)->getDeducedType();
3187 assert(!DT.isNull() && "Undeduced types shouldn't reach here.")((!DT.isNull() && "Undeduced types shouldn't reach here."
) ? static_cast<void> (0) : __assert_fail ("!DT.isNull() && \"Undeduced types shouldn't reach here.\""
, "/build/llvm-toolchain-snapshot-13~++20210405022414+5f57793c4fe4/clang/lib/CodeGen/CGDebugInfo.cpp"
, 3187, __PRETTY_FUNCTION__))
;
3188 T = DT;
3189 break;
3190 }
3191 case Type::Adjusted:
3192 case Type::Decayed:
3193 // Decayed and adjusted types use the adjusted type in LLVM and DWARF.
3194 T = cast<AdjustedType>(T)->getAdjustedType();
3195 break;
3196 }
3197
3198 assert(T != LastT && "Type unwrapping failed to unwrap!")((T != LastT && "Type unwrapping failed to unwrap!") ?
static_cast<void> (0) : __assert_fail ("T != LastT && \"Type unwrapping failed to unwrap!\""
, "/build/llvm-toolchain-snapshot-13~++20210405022414+5f57793c4fe4/clang/lib/CodeGen/CGDebugInfo.cpp"
, 3198, __PRETTY_FUNCTION__))
;
3199 (void)LastT;
3200 } while (true);
3201}
3202
3203llvm::DIType *CGDebugInfo::getTypeOrNull(QualType Ty) {
3204 assert(Ty == UnwrapTypeForDebugInfo(Ty, CGM.getContext()))((Ty == UnwrapTypeForDebugInfo(Ty, CGM.getContext())) ? static_cast
<void> (0) : __assert_fail ("Ty == UnwrapTypeForDebugInfo(Ty, CGM.getContext())"
, "/build/llvm-toolchain-snapshot-13~++20210405022414+5f57793c4fe4/clang/lib/CodeGen/CGDebugInfo.cpp"
, 3204, __PRETTY_FUNCTION__))
;
3205 auto It = TypeCache.find(Ty.getAsOpaquePtr());
3206 if (It != TypeCache.end()) {
3207 // Verify that the debug info still exists.
3208 if (llvm::Metadata *V = It->second)
3209 return cast<llvm::DIType>(V);
3210 }
3211
3212 return nullptr;
3213}
3214
3215void CGDebugInfo::completeTemplateDefinition(
3216 const ClassTemplateSpecializationDecl &SD) {
3217 completeUnusedClass(SD);
3218}
3219
3220void CGDebugInfo::completeUnusedClass(const CXXRecordDecl &D) {
3221 if (DebugKind <= codegenoptions::DebugLineTablesOnly)
3222 return;
3223
3224 completeClassData(&D);
3225 // In case this type has no member function definitions being emitted, ensure
3226 // it is retained
3227 RetainedTypes.push_back(CGM.getContext().getRecordType(&D).getAsOpaquePtr());
3228}
3229
3230llvm::DIType *CGDebugInfo::getOrCreateType(QualType Ty, llvm::DIFile *Unit) {
3231 if (Ty.isNull())
3
Taking false branch
3232 return nullptr;
3233
3234 llvm::TimeTraceScope TimeScope("DebugType", [&]() {
3235 std::string Name;
3236 llvm::raw_string_ostream OS(Name);
3237 Ty.print(OS, getPrintingPolicy());
3238 return Name;
3239 });
3240
3241 // Unwrap the type as needed for debug information.
3242 Ty = UnwrapTypeForDebugInfo(Ty, CGM.getContext());
3243
3244 if (auto *T
3.1
'T' is null
3.1
'T' is null
= getTypeOrNull(Ty))
4
Taking false branch
3245 return T;
3246
3247 llvm::DIType *Res = CreateTypeNode(Ty, Unit);
5
Calling 'CGDebugInfo::CreateTypeNode'
3248 void *TyPtr = Ty.getAsOpaquePtr();
3249
3250 // And update the type cache.
3251 TypeCache[TyPtr].reset(Res);
3252
3253 return Res;
3254}
3255
3256llvm::DIModule *CGDebugInfo::getParentModuleOrNull(const Decl *D) {
3257 // A forward declaration inside a module header does not belong to the module.
3258 if (isa<RecordDecl>(D) && !cast<RecordDecl>(D)->getDefinition())
3259 return nullptr;
3260 if (DebugTypeExtRefs && D->isFromASTFile()) {
3261 // Record a reference to an imported clang module or precompiled header.
3262 auto *Reader = CGM.getContext().getExternalSource();
3263 auto Idx = D->getOwningModuleID();
3264 auto Info = Reader->getSourceDescriptor(Idx);
3265 if (Info)
3266 return getOrCreateModuleRef(*Info, /*SkeletonCU=*/true);
3267 } else if (ClangModuleMap) {
3268 // We are building a clang module or a precompiled header.
3269 //
3270 // TODO: When D is a CXXRecordDecl or a C++ Enum, the ODR applies
3271 // and it wouldn't be necessary to specify the parent scope
3272 // because the type is already unique by definition (it would look
3273 // like the output of -fno-standalone-debug). On the other hand,
3274 // the parent scope helps a consumer to quickly locate the object
3275 // file where the type's definition is located, so it might be
3276 // best to make this behavior a command line or debugger tuning
3277 // option.
3278 if (Module *M = D->getOwningModule()) {
3279 // This is a (sub-)module.
3280 auto Info = ASTSourceDescriptor(*M);
3281 return getOrCreateModuleRef(Info, /*SkeletonCU=*/false);
3282 } else {
3283 // This the precompiled header being built.
3284 return getOrCreateModuleRef(PCHDescriptor, /*SkeletonCU=*/false);
3285 }
3286 }
3287
3288 return nullptr;
3289}
3290
3291llvm::DIType *CGDebugInfo::CreateTypeNode(QualType Ty, llvm::DIFile *Unit) {
3292 // Handle qualifiers, which recursively handles what they refer to.
3293 if (Ty.hasLocalQualifiers())
6
Assuming the condition is false
7
Taking false branch
3294 return CreateQualifiedType(Ty, Unit);
3295
3296 // Work out details of type.
3297 switch (Ty->getTypeClass()) {
8
Control jumps to 'case MemberPointer:' at line 3345
3298#define TYPE(Class, Base)
3299#define ABSTRACT_TYPE(Class, Base)
3300#define NON_CANONICAL_TYPE(Class, Base)
3301#define DEPENDENT_TYPE(Class, Base) case Type::Class:
3302#include "clang/AST/TypeNodes.inc"
3303 llvm_unreachable("Dependent types cannot show up in debug information")::llvm::llvm_unreachable_internal("Dependent types cannot show up in debug information"
, "/build/llvm-toolchain-snapshot-13~++20210405022414+5f57793c4fe4/clang/lib/CodeGen/CGDebugInfo.cpp"
, 3303)
;
3304
3305 case Type::ExtVector:
3306 case Type::Vector:
3307 return CreateType(cast<VectorType>(Ty), Unit);
3308 case Type::ConstantMatrix:
3309 return CreateType(cast<ConstantMatrixType>(Ty), Unit);
3310 case Type::ObjCObjectPointer:
3311 return CreateType(cast<ObjCObjectPointerType>(Ty), Unit);
3312 case Type::ObjCObject:
3313 return CreateType(cast<ObjCObjectType>(Ty), Unit);
3314 case Type::ObjCTypeParam:
3315 return CreateType(cast<ObjCTypeParamType>(Ty), Unit);
3316 case Type::ObjCInterface:
3317 return CreateType(cast<ObjCInterfaceType>(Ty), Unit);
3318 case Type::Builtin:
3319 return CreateType(cast<BuiltinType>(Ty));
3320 case Type::Complex:
3321 return CreateType(cast<ComplexType>(Ty));
3322 case Type::Pointer:
3323 return CreateType(cast<PointerType>(Ty), Unit);
3324 case Type::BlockPointer:
3325 return CreateType(cast<BlockPointerType>(Ty), Unit);
3326 case Type::Typedef:
3327 return CreateType(cast<TypedefType>(Ty), Unit);
3328 case Type::Record:
3329 return CreateType(cast<RecordType>(Ty));
3330 case Type::Enum:
3331 return CreateEnumType(cast<EnumType>(Ty));
3332 case Type::FunctionProto:
3333 case Type::FunctionNoProto:
3334 return CreateType(cast<FunctionType>(Ty), Unit);
3335 case Type::ConstantArray:
3336 case Type::VariableArray:
3337 case Type::IncompleteArray:
3338 return CreateType(cast<ArrayType>(Ty), Unit);
3339
3340 case Type::LValueReference:
3341 return CreateType(cast<LValueReferenceType>(Ty), Unit);
3342 case Type::RValueReference:
3343 return CreateType(cast<RValueReferenceType>(Ty), Unit);
3344
3345 case Type::MemberPointer:
3346 return CreateType(cast<MemberPointerType>(Ty), Unit);
9
Calling 'CGDebugInfo::CreateType'
3347
3348 case Type::Atomic:
3349 return CreateType(cast<AtomicType>(Ty), Unit);
3350
3351 case Type::ExtInt:
3352 return CreateType(cast<ExtIntType>(Ty));
3353 case Type::Pipe:
3354 return CreateType(cast<PipeType>(Ty), Unit);
3355
3356 case Type::TemplateSpecialization:
3357 return CreateType(cast<TemplateSpecializationType>(Ty), Unit);
3358
3359 case Type::Auto:
3360 case Type::Attributed:
3361 case Type::Adjusted:
3362 case Type::Decayed:
3363 case Type::DeducedTemplateSpecialization:
3364 case Type::Elaborated:
3365 case Type::Paren:
3366 case Type::MacroQualified:
3367 case Type::SubstTemplateTypeParm:
3368 case Type::TypeOfExpr:
3369 case Type::TypeOf:
3370 case Type::Decltype:
3371 case Type::UnaryTransform:
3372 break;
3373 }
3374
3375 llvm_unreachable("type should have been unwrapped!")::llvm::llvm_unreachable_internal("type should have been unwrapped!"
, "/build/llvm-toolchain-snapshot-13~++20210405022414+5f57793c4fe4/clang/lib/CodeGen/CGDebugInfo.cpp"
, 3375)
;
3376}
3377
3378llvm::DICompositeType *
3379CGDebugInfo::getOrCreateLimitedType(const RecordType *Ty) {
3380 QualType QTy(Ty, 0);
3381
3382 auto *T = cast_or_null<llvm::DICompositeType>(getTypeOrNull(QTy));
3383
3384 // We may have cached a forward decl when we could have created
3385 // a non-forward decl. Go ahead and create a non-forward decl
3386 // now.
3387 if (T && !T->isForwardDecl())
3388 return T;
3389
3390 // Otherwise create the type.
3391 llvm::DICompositeType *Res = CreateLimitedType(Ty);
3392
3393 // Propagate members from the declaration to the definition
3394 // CreateType(const RecordType*) will overwrite this with the members in the
3395 // correct order if the full type is needed.
3396 DBuilder.replaceArrays(Res, T ? T->getElements() : llvm::DINodeArray());
3397
3398 // And update the type cache.
3399 TypeCache[QTy.getAsOpaquePtr()].reset(Res);
3400 return Res;
3401}
3402
3403// TODO: Currently used for context chains when limiting debug info.
3404llvm::DICompositeType *CGDebugInfo::CreateLimitedType(const RecordType *Ty) {
3405 RecordDecl *RD = Ty->getDecl();
3406
3407 // Get overall information about the record type for the debug info.
3408 StringRef RDName = getClassName(RD);
3409 const SourceLocation Loc = RD->getLocation();
3410 llvm::DIFile *DefUnit = nullptr;
3411 unsigned Line = 0;
3412 if (Loc.isValid()) {
3413 DefUnit = getOrCreateFile(Loc);
3414 Line = getLineNumber(Loc);
3415 }
3416
3417 llvm::DIScope *RDContext = getDeclContextDescriptor(RD);
3418
3419 // If we ended up creating the type during the context chain construction,
3420 // just return that.
3421 auto *T = cast_or_null<llvm::DICompositeType>(
3422 getTypeOrNull(CGM.getContext().getRecordType(RD)));
3423 if (T && (!T->isForwardDecl() || !RD->getDefinition()))
3424 return T;
3425
3426 // If this is just a forward or incomplete declaration, construct an
3427 // appropriately marked node and just return it.
3428 const RecordDecl *D = RD->getDefinition();
3429 if (!D || !D->isCompleteDefinition())
3430 return getOrCreateRecordFwdDecl(Ty, RDContext);
3431
3432 uint64_t Size = CGM.getContext().getTypeSize(Ty);
3433 auto Align = getDeclAlignIfRequired(D, CGM.getContext());
3434
3435 SmallString<256> Identifier = getTypeIdentifier(Ty, CGM, TheCU);
3436
3437 // Explicitly record the calling convention and export symbols for C++
3438 // records.
3439 auto Flags = llvm::DINode::FlagZero;
3440 if (auto CXXRD = dyn_cast<CXXRecordDecl>(RD)) {
3441 if (CGM.getCXXABI().getRecordArgABI(CXXRD) == CGCXXABI::RAA_Indirect)
3442 Flags |= llvm::DINode::FlagTypePassByReference;
3443 else
3444 Flags |= llvm::DINode::FlagTypePassByValue;
3445
3446 // Record if a C++ record is non-trivial type.
3447 if (!CXXRD->isTrivial())
3448 Flags |= llvm::DINode::FlagNonTrivial;
3449
3450 // Record exports it symbols to the containing structure.
3451 if (CXXRD->isAnonymousStructOrUnion())
3452 Flags |= llvm::DINode::FlagExportSymbols;
3453 }
3454
3455 llvm::DICompositeType *RealDecl = DBuilder.createReplaceableCompositeType(
3456 getTagForRecord(RD), RDName, RDContext, DefUnit, Line, 0, Size, Align,
3457 Flags, Identifier);
3458
3459 // Elements of composite types usually have back to the type, creating
3460 // uniquing cycles. Distinct nodes are more efficient.
3461 switch (RealDecl->getTag()) {
3462 default:
3463 llvm_unreachable("invalid composite type tag")::llvm::llvm_unreachable_internal("invalid composite type tag"
, "/build/llvm-toolchain-snapshot-13~++20210405022414+5f57793c4fe4/clang/lib/CodeGen/CGDebugInfo.cpp"
, 3463)
;
3464
3465 case llvm::dwarf::DW_TAG_array_type:
3466 case llvm::dwarf::DW_TAG_enumeration_type:
3467 // Array elements and most enumeration elements don't have back references,
3468 // so they don't tend to be involved in uniquing cycles and there is some
3469 // chance of merging them when linking together two modules. Only make
3470 // them distinct if they are ODR-uniqued.
3471 if (Identifier.empty())
3472 break;
3473 LLVM_FALLTHROUGH[[gnu::fallthrough]];
3474
3475 case llvm::dwarf::DW_TAG_structure_type:
3476 case llvm::dwarf::DW_TAG_union_type:
3477 case llvm::dwarf::DW_TAG_class_type:
3478 // Immediately resolve to a distinct node.
3479 RealDecl =
3480 llvm::MDNode::replaceWithDistinct(llvm::TempDICompositeType(RealDecl));
3481 break;
3482 }
3483
3484 RegionMap[Ty->getDecl()].reset(RealDecl);
3485 TypeCache[QualType(Ty, 0).getAsOpaquePtr()].reset(RealDecl);
3486
3487 if (const auto *TSpecial = dyn_cast<ClassTemplateSpecializationDecl>(RD))
3488 DBuilder.replaceArrays(RealDecl, llvm::DINodeArray(),
3489 CollectCXXTemplateParams(TSpecial, DefUnit));
3490 return RealDecl;
3491}
3492
3493void CGDebugInfo::CollectContainingType(const CXXRecordDecl *RD,
3494 llvm::DICompositeType *RealDecl) {
3495 // A class's primary base or the class itself contains the vtable.
3496 llvm::DICompositeType *ContainingType = nullptr;
3497 const ASTRecordLayout &RL = CGM.getContext().getASTRecordLayout(RD);
3498 if (const CXXRecordDecl *PBase = RL.getPrimaryBase()) {
3499 // Seek non-virtual primary base root.
3500 while (1) {
3501 const ASTRecordLayout &BRL = CGM.getContext().getASTRecordLayout(PBase);
3502 const CXXRecordDecl *PBT = BRL.getPrimaryBase();
3503 if (PBT && !BRL.isPrimaryBaseVirtual())
3504 PBase = PBT;
3505 else
3506 break;
3507 }
3508 ContainingType = cast<llvm::DICompositeType>(
3509 getOrCreateType(QualType(PBase->getTypeForDecl(), 0),
3510 getOrCreateFile(RD->getLocation())));
3511 } else if (RD->isDynamicClass())
3512 ContainingType = RealDecl;
3513
3514 DBuilder.replaceVTableHolder(RealDecl, ContainingType);
3515}
3516
3517llvm::DIType *CGDebugInfo::CreateMemberType(llvm::DIFile *Unit, QualType FType,
3518 StringRef Name, uint64_t *Offset) {
3519 llvm::DIType *FieldTy = CGDebugInfo::getOrCreateType(FType, Unit);
3520 uint64_t FieldSize = CGM.getContext().getTypeSize(FType);
3521 auto FieldAlign = getTypeAlignIfRequired(FType, CGM.getContext());
3522 llvm::DIType *Ty =
3523 DBuilder.createMemberType(Unit, Name, Unit, 0, FieldSize, FieldAlign,
3524 *Offset, llvm::DINode::FlagZero, FieldTy);
3525 *Offset += FieldSize;
3526 return Ty;
3527}
3528
3529void CGDebugInfo::collectFunctionDeclProps(GlobalDecl GD, llvm::DIFile *Unit,
3530 StringRef &Name,
3531 StringRef &LinkageName,
3532 llvm::DIScope *&FDContext,
3533 llvm::DINodeArray &TParamsArray,
3534 llvm::DINode::DIFlags &Flags) {
3535 const auto *FD = cast<FunctionDecl>(GD.getCanonicalDecl().getDecl());
3536 Name = getFunctionName(FD);
3537 // Use mangled name as linkage name for C/C++ functions.
3538 if (FD->hasPrototype()) {
3539 LinkageName = CGM.getMangledName(GD);
3540 Flags |= llvm::DINode::FlagPrototyped;
3541 }
3542 // No need to replicate the linkage name if it isn't different from the
3543 // subprogram name, no need to have it at all unless coverage is enabled or
3544 // debug is set to more than just line tables or extra debug info is needed.
3545 if (LinkageName == Name || (!CGM.getCodeGenOpts().EmitGcovArcs &&
3546 !CGM.getCodeGenOpts().EmitGcovNotes &&
3547 !CGM.getCodeGenOpts().DebugInfoForProfiling &&
3548 DebugKind <= codegenoptions::DebugLineTablesOnly))
3549 LinkageName = StringRef();
3550
3551 // Emit the function scope in line tables only mode (if CodeView) to
3552 // differentiate between function names.
3553 if (CGM.getCodeGenOpts().hasReducedDebugInfo() ||
3554 (DebugKind == codegenoptions::DebugLineTablesOnly &&
3555 CGM.getCodeGenOpts().EmitCodeView)) {
3556 if (const NamespaceDecl *NSDecl =
3557 dyn_cast_or_null<NamespaceDecl>(FD->getDeclContext()))
3558 FDContext = getOrCreateNamespace(NSDecl);
3559 else if (const RecordDecl *RDecl =
3560 dyn_cast_or_null<RecordDecl>(FD->getDeclContext())) {
3561 llvm::DIScope *Mod = getParentModuleOrNull(RDecl);
3562 FDContext = getContextDescriptor(RDecl, Mod ? Mod : TheCU);
3563 }
3564 }
3565 if (CGM.getCodeGenOpts().hasReducedDebugInfo()) {
3566 // Check if it is a noreturn-marked function
3567 if (FD->isNoReturn())
3568 Flags |= llvm::DINode::FlagNoReturn;
3569 // Collect template parameters.
3570 TParamsArray = CollectFunctionTemplateParams(FD, Unit);
3571 }
3572}
3573
3574void CGDebugInfo::collectVarDeclProps(const VarDecl *VD, llvm::DIFile *&Unit,
3575 unsigned &LineNo, QualType &T,
3576 StringRef &Name, StringRef &LinkageName,
3577 llvm::MDTuple *&TemplateParameters,
3578 llvm::DIScope *&VDContext) {
3579 Unit = getOrCreateFile(VD->getLocation());
3580 LineNo = getLineNumber(VD->getLocation());
3581
3582 setLocation(VD->getLocation());
3583
3584 T = VD->getType();
3585 if (T->isIncompleteArrayType()) {
3586 // CodeGen turns int[] into int[1] so we'll do the same here.
3587 llvm::APInt ConstVal(32, 1);
3588 QualType ET = CGM.getContext().getAsArrayType(T)->getElementType();
3589
3590 T = CGM.getContext().getConstantArrayType(ET, ConstVal, nullptr,
3591 ArrayType::Normal, 0);
3592 }
3593
3594 Name = VD->getName();
3595 if (VD->getDeclContext() && !isa<FunctionDecl>(VD->getDeclContext()) &&
3596 !isa<ObjCMethodDecl>(VD->getDeclContext()))
3597 LinkageName = CGM.getMangledName(VD);
3598 if (LinkageName == Name)
3599 LinkageName = StringRef();
3600
3601 if (isa<VarTemplateSpecializationDecl>(VD)) {
3602 llvm::DINodeArray parameterNodes = CollectVarTemplateParams(VD, &*Unit);
3603 TemplateParameters = parameterNodes.get();
3604 } else {
3605 TemplateParameters = nullptr;
3606 }
3607
3608 // Since we emit declarations (DW_AT_members) for static members, place the
3609 // definition of those static members in the namespace they were declared in
3610 // in the source code (the lexical decl context).
3611 // FIXME: Generalize this for even non-member global variables where the
3612 // declaration and definition may have different lexical decl contexts, once
3613 // we have support for emitting declarations of (non-member) global variables.
3614 const DeclContext *DC = VD->isStaticDataMember() ? VD->getLexicalDeclContext()
3615 : VD->getDeclContext();
3616 // When a record type contains an in-line initialization of a static data
3617 // member, and the record type is marked as __declspec(dllexport), an implicit
3618 // definition of the member will be created in the record context. DWARF
3619 // doesn't seem to have a nice way to describe this in a form that consumers
3620 // are likely to understand, so fake the "normal" situation of a definition
3621 // outside the class by putting it in the global scope.
3622 if (DC->isRecord())
3623 DC = CGM.getContext().getTranslationUnitDecl();
3624
3625 llvm::DIScope *Mod = getParentModuleOrNull(VD);
3626 VDContext = getContextDescriptor(cast<Decl>(DC), Mod ? Mod : TheCU);
3627}
3628
3629llvm::DISubprogram *CGDebugInfo::getFunctionFwdDeclOrStub(GlobalDecl GD,
3630 bool Stub) {
3631 llvm::DINodeArray TParamsArray;
3632 StringRef Name, LinkageName;
3633 llvm::DINode::DIFlags Flags = llvm::DINode::FlagZero;
3634 llvm::DISubprogram::DISPFlags SPFlags = llvm::DISubprogram::SPFlagZero;
3635 SourceLocation Loc = GD.getDecl()->getLocation();
3636 llvm::DIFile *Unit = getOrCreateFile(Loc);
3637 llvm::DIScope *DContext = Unit;
3638 unsigned Line = getLineNumber(Loc);
3639 collectFunctionDeclProps(GD, Unit, Name, LinkageName, DContext, TParamsArray,
3640 Flags);
3641 auto *FD = cast<FunctionDecl>(GD.getDecl());
3642
3643 // Build function type.
3644 SmallVector<QualType, 16> ArgTypes;
3645 for (const ParmVarDecl *Parm : FD->parameters())
3646 ArgTypes.push_back(Parm->getType());
3647
3648 CallingConv CC = FD->getType()->castAs<FunctionType>()->getCallConv();
3649 QualType FnType = CGM.getContext().getFunctionType(
3650 FD->getReturnType(), ArgTypes, FunctionProtoType::ExtProtoInfo(CC));
3651 if (!FD->isExternallyVisible())
3652 SPFlags |= llvm::DISubprogram::SPFlagLocalToUnit;
3653 if (CGM.getLangOpts().Optimize)
3654 SPFlags |= llvm::DISubprogram::SPFlagOptimized;
3655
3656 if (Stub) {
3657 Flags |= getCallSiteRelatedAttrs();
3658 SPFlags |= llvm::DISubprogram::SPFlagDefinition;
3659 return DBuilder.createFunction(
3660 DContext, Name, LinkageName, Unit, Line,
3661 getOrCreateFunctionType(GD.getDecl(), FnType, Unit), 0, Flags, SPFlags,
3662 TParamsArray.get(), getFunctionDeclaration(FD));
3663 }
3664
3665 llvm::DISubprogram *SP = DBuilder.createTempFunctionFwdDecl(
3666 DContext, Name, LinkageName, Unit, Line,
3667 getOrCreateFunctionType(GD.getDecl(), FnType, Unit), 0, Flags, SPFlags,
3668 TParamsArray.get(), getFunctionDeclaration(FD));
3669 const FunctionDecl *CanonDecl = FD->getCanonicalDecl();
3670 FwdDeclReplaceMap.emplace_back(std::piecewise_construct,
3671 std::make_tuple(CanonDecl),
3672 std::make_tuple(SP));
3673 return SP;
3674}
3675
3676llvm::DISubprogram *CGDebugInfo::getFunctionForwardDeclaration(GlobalDecl GD) {
3677 return getFunctionFwdDeclOrStub(GD, /* Stub = */ false);
3678}
3679
3680llvm::DISubprogram *CGDebugInfo::getFunctionStub(GlobalDecl GD) {
3681 return getFunctionFwdDeclOrStub(GD, /* Stub = */ true);
3682}
3683
3684llvm::DIGlobalVariable *
3685CGDebugInfo::getGlobalVariableForwardDeclaration(const VarDecl *VD) {
3686 QualType T;
3687 StringRef Name, LinkageName;
3688 SourceLocation Loc = VD->getLocation();
3689 llvm::DIFile *Unit = getOrCreateFile(Loc);
3690 llvm::DIScope *DContext = Unit;
3691 unsigned Line = getLineNumber(Loc);
3692 llvm::MDTuple *TemplateParameters = nullptr;
3693
3694 collectVarDeclProps(VD, Unit, Line, T, Name, LinkageName, TemplateParameters,
3695 DContext);
3696 auto Align = getDeclAlignIfRequired(VD, CGM.getContext());
3697 auto *GV = DBuilder.createTempGlobalVariableFwdDecl(
3698 DContext, Name, LinkageName, Unit, Line, getOrCreateType(T, Unit),
3699 !VD->isExternallyVisible(), nullptr, TemplateParameters, Align);
3700 FwdDeclReplaceMap.emplace_back(
3701 std::piecewise_construct,
3702 std::make_tuple(cast<VarDecl>(VD->getCanonicalDecl())),
3703 std::make_tuple(static_cast<llvm::Metadata *>(GV)));
3704 return GV;
3705}
3706
3707llvm::DINode *CGDebugInfo::getDeclarationOrDefinition(const Decl *D) {
3708 // We only need a declaration (not a definition) of the type - so use whatever
3709 // we would otherwise do to get a type for a pointee. (forward declarations in
3710 // limited debug info, full definitions (if the type definition is available)
3711 // in unlimited debug info)
3712 if (const auto *TD = dyn_cast<TypeDecl>(D))
3713 return getOrCreateType(CGM.getContext().getTypeDeclType(TD),
3714 getOrCreateFile(TD->getLocation()));
3715 auto I = DeclCache.find(D->getCanonicalDecl());
3716
3717 if (I != DeclCache.end()) {
3718 auto N = I->second;
3719 if (auto *GVE = dyn_cast_or_null<llvm::DIGlobalVariableExpression>(N))
3720 return GVE->getVariable();
3721 return dyn_cast_or_null<llvm::DINode>(N);
3722 }
3723
3724 // No definition for now. Emit a forward definition that might be
3725 // merged with a potential upcoming definition.
3726 if (const auto *FD = dyn_cast<FunctionDecl>(D))
3727 return getFunctionForwardDeclaration(FD);
3728 else if (const auto *VD = dyn_cast<VarDecl>(D))
3729 return getGlobalVariableForwardDeclaration(VD);
3730
3731 return nullptr;
3732}
3733
3734llvm::DISubprogram *CGDebugInfo::getFunctionDeclaration(const Decl *D) {
3735 if (!D || DebugKind <= codegenoptions::DebugLineTablesOnly)
3736 return nullptr;
3737
3738 const auto *FD = dyn_cast<FunctionDecl>(D);
3739 if (!FD)
3740 return nullptr;
3741
3742 // Setup context.
3743 auto *S = getDeclContextDescriptor(D);
3744
3745 auto MI = SPCache.find(FD->getCanonicalDecl());
3746 if (MI == SPCache.end()) {
3747 if (const auto *MD = dyn_cast<CXXMethodDecl>(FD->getCanonicalDecl())) {
3748 return CreateCXXMemberFunction(MD, getOrCreateFile(MD->getLocation()),
3749 cast<llvm::DICompositeType>(S));
3750 }
3751 }
3752 if (MI != SPCache.end()) {
3753 auto *SP = dyn_cast_or_null<llvm::DISubprogram>(MI->second);
3754 if (SP && !SP->isDefinition())
3755 return SP;
3756 }
3757
3758 for (auto NextFD : FD->redecls()) {
3759 auto MI = SPCache.find(NextFD->getCanonicalDecl());
3760 if (MI != SPCache.end()) {
3761 auto *SP = dyn_cast_or_null<llvm::DISubprogram>(MI->second);
3762 if (SP && !SP->isDefinition())
3763 return SP;
3764 }
3765 }
3766 return nullptr;
3767}
3768
3769llvm::DISubprogram *CGDebugInfo::getObjCMethodDeclaration(
3770 const Decl *D, llvm::DISubroutineType *FnType, unsigned LineNo,
3771 llvm::DINode::DIFlags Flags, llvm::DISubprogram::DISPFlags SPFlags) {
3772 if (!D || DebugKind <= codegenoptions::DebugLineTablesOnly)
3773 return nullptr;
3774
3775 const auto *OMD = dyn_cast<ObjCMethodDecl>(D);
3776 if (!OMD)
3777 return nullptr;
3778
3779 if (CGM.getCodeGenOpts().DwarfVersion < 5 && !OMD->isDirectMethod())
3780 return nullptr;
3781
3782 if (OMD->isDirectMethod())
3783 SPFlags |= llvm::DISubprogram::SPFlagObjCDirect;
3784
3785 // Starting with DWARF V5 method declarations are emitted as children of
3786 // the interface type.
3787 auto *ID = dyn_cast_or_null<ObjCInterfaceDecl>(D->getDeclContext());
3788 if (!ID)
3789 ID = OMD->getClassInterface();
3790 if (!ID)
3791 return nullptr;
3792 QualType QTy(ID->getTypeForDecl(), 0);
3793 auto It = TypeCache.find(QTy.getAsOpaquePtr());
3794 if (It == TypeCache.end())
3795 return nullptr;
3796 auto *InterfaceType = cast<llvm::DICompositeType>(It->second);
3797 llvm::DISubprogram *FD = DBuilder.createFunction(
3798 InterfaceType, getObjCMethodName(OMD), StringRef(),
3799 InterfaceType->getFile(), LineNo, FnType, LineNo, Flags, SPFlags);
3800 DBuilder.finalizeSubprogram(FD);
3801 ObjCMethodCache[ID].push_back({FD, OMD->isDirectMethod()});
3802 return FD;
3803}
3804
3805// getOrCreateFunctionType - Construct type. If it is a c++ method, include
3806// implicit parameter "this".
3807llvm::DISubroutineType *CGDebugInfo::getOrCreateFunctionType(const Decl *D,
3808 QualType FnType,
3809 llvm::DIFile *F) {
3810 // In CodeView, we emit the function types in line tables only because the
3811 // only way to distinguish between functions is by display name and type.
3812 if (!D || (DebugKind <= codegenoptions::DebugLineTablesOnly &&
3813 !CGM.getCodeGenOpts().EmitCodeView))
3814 // Create fake but valid subroutine type. Otherwise -verify would fail, and
3815 // subprogram DIE will miss DW_AT_decl_file and DW_AT_decl_line fields.
3816 return DBuilder.createSubroutineType(DBuilder.getOrCreateTypeArray(None));
3817
3818 if (const auto *Method = dyn_cast<CXXMethodDecl>(D))
3819 return getOrCreateMethodType(Method, F, false);
3820
3821 const auto *FTy = FnType->getAs<FunctionType>();
3822 CallingConv CC = FTy ? FTy->getCallConv() : CallingConv::CC_C;
3823
3824 if (const auto *OMethod = dyn_cast<ObjCMethodDecl>(D)) {
3825 // Add "self" and "_cmd"
3826 SmallVector<llvm::Metadata *, 16> Elts;
3827
3828 // First element is always return type. For 'void' functions it is NULL.
3829 QualType ResultTy = OMethod->getReturnType();
3830
3831 // Replace the instancetype keyword with the actual type.
3832 if (ResultTy == CGM.getContext().getObjCInstanceType())
3833 ResultTy = CGM.getContext().getPointerType(
3834 QualType(OMethod->getClassInterface()->getTypeForDecl(), 0));
3835
3836 Elts.push_back(getOrCreateType(ResultTy, F));
3837 // "self" pointer is always first argument.
3838 QualType SelfDeclTy;
3839 if (auto *SelfDecl = OMethod->getSelfDecl())
3840 SelfDeclTy = SelfDecl->getType();
3841 else if (auto *FPT = dyn_cast<FunctionProtoType>(FnType))
3842 if (FPT->getNumParams() > 1)
3843 SelfDeclTy = FPT->getParamType(0);
3844 if (!SelfDeclTy.isNull())
3845 Elts.push_back(
3846 CreateSelfType(SelfDeclTy, getOrCreateType(SelfDeclTy, F)));
3847 // "_cmd" pointer is always second argument.
3848 Elts.push_back(DBuilder.createArtificialType(
3849 getOrCreateType(CGM.getContext().getObjCSelType(), F)));
3850 // Get rest of the arguments.
3851 for (const auto *PI : OMethod->parameters())
3852 Elts.push_back(getOrCreateType(PI->getType(), F));
3853 // Variadic methods need a special marker at the end of the type list.
3854 if (OMethod->isVariadic())
3855 Elts.push_back(DBuilder.createUnspecifiedParameter());
3856
3857 llvm::DITypeRefArray EltTypeArray = DBuilder.getOrCreateTypeArray(Elts);
3858 return DBuilder.createSubroutineType(EltTypeArray, llvm::DINode::FlagZero,
3859 getDwarfCC(CC));
3860 }
3861
3862 // Handle variadic function types; they need an additional
3863 // unspecified parameter.
3864 if (const auto *FD = dyn_cast<FunctionDecl>(D))
3865 if (FD->isVariadic()) {
3866 SmallVector<llvm::Metadata *, 16> EltTys;
3867 EltTys.push_back(getOrCreateType(FD->getReturnType(), F));
3868 if (const auto *FPT = dyn_cast<FunctionProtoType>(FnType))
3869 for (QualType ParamType : FPT->param_types())
3870 EltTys.push_back(getOrCreateType(ParamType, F));
3871 EltTys.push_back(DBuilder.createUnspecifiedParameter());
3872 llvm::DITypeRefArray EltTypeArray = DBuilder.getOrCreateTypeArray(EltTys);
3873 return DBuilder.createSubroutineType(EltTypeArray, llvm::DINode::FlagZero,
3874 getDwarfCC(CC));
3875 }
3876
3877 return cast<llvm::DISubroutineType>(getOrCreateType(FnType, F));
3878}
3879
3880void CGDebugInfo::emitFunctionStart(GlobalDecl GD, SourceLocation Loc,
3881 SourceLocation ScopeLoc, QualType FnType,
3882 llvm::Function *Fn, bool CurFuncIsThunk) {
3883 StringRef Name;
3884 StringRef LinkageName;
3885
3886 FnBeginRegionCount.push_back(LexicalBlockStack.size());
3887
3888 const Decl *D = GD.getDecl();
3889 bool HasDecl = (D != nullptr);
3890
3891 llvm::DINode::DIFlags Flags = llvm::DINode::FlagZero;
3892 llvm::DISubprogram::DISPFlags SPFlags = llvm::DISubprogram::SPFlagZero;
3893 llvm::DIFile *Unit = getOrCreateFile(Loc);
3894 llvm::DIScope *FDContext = Unit;
3895 llvm::DINodeArray TParamsArray;
3896 if (!HasDecl) {
3897 // Use llvm function name.
3898 LinkageName = Fn->getName();
3899 } else if (const auto *FD = dyn_cast<FunctionDecl>(D)) {
3900 // If there is a subprogram for this function available then use it.
3901 auto FI = SPCache.find(FD->getCanonicalDecl());
3902 if (FI != SPCache.end()) {
3903 auto *SP = dyn_cast_or_null<llvm::DISubprogram>(FI->second);
3904 if (SP && SP->isDefinition()) {
3905 LexicalBlockStack.emplace_back(SP);
3906 RegionMap[D].reset(SP);
3907 return;
3908 }
3909 }
3910 collectFunctionDeclProps(GD, Unit, Name, LinkageName, FDContext,
3911 TParamsArray, Flags);
3912 } else if (const auto *OMD = dyn_cast<ObjCMethodDecl>(D)) {
3913 Name = getObjCMethodName(OMD);
3914 Flags |= llvm::DINode::FlagPrototyped;
3915 } else if (isa<VarDecl>(D) &&
3916 GD.getDynamicInitKind() != DynamicInitKind::NoStub) {
3917 // This is a global initializer or atexit destructor for a global variable.
3918 Name = getDynamicInitializerName(cast<VarDecl>(D), GD.getDynamicInitKind(),
3919 Fn);
3920 } else {
3921 Name = Fn->getName();
3922
3923 if (isa<BlockDecl>(D))
3924 LinkageName = Name;
3925
3926 Flags |= llvm::DINode::FlagPrototyped;
3927 }
3928 if (Name.startswith("\01"))
3929 Name = Name.substr(1);
3930
3931 if (!HasDecl || D->isImplicit() || D->hasAttr<ArtificialAttr>() ||
3932 (isa<VarDecl>(D) && GD.getDynamicInitKind() != DynamicInitKind::NoStub)) {
3933 Flags |= llvm::DINode::FlagArtificial;
3934 // Artificial functions should not silently reuse CurLoc.
3935 CurLoc = SourceLocation();
3936 }
3937
3938 if (CurFuncIsThunk)
3939 Flags |= llvm::DINode::FlagThunk;
3940
3941 if (Fn->hasLocalLinkage())
3942 SPFlags |= llvm::DISubprogram::SPFlagLocalToUnit;
3943 if (CGM.getLangOpts().Optimize)
3944 SPFlags |= llvm::DISubprogram::SPFlagOptimized;
3945
3946 llvm::DINode::DIFlags FlagsForDef = Flags | getCallSiteRelatedAttrs();
3947 llvm::DISubprogram::DISPFlags SPFlagsForDef =
3948 SPFlags | llvm::DISubprogram::SPFlagDefinition;
3949
3950 const unsigned LineNo = getLineNumber(Loc.isValid() ? Loc : CurLoc);
3951 unsigned ScopeLine = getLineNumber(ScopeLoc);
3952 llvm::DISubroutineType *DIFnType = getOrCreateFunctionType(D, FnType, Unit);
3953 llvm::DISubprogram *Decl = nullptr;
3954 if (D)
3955 Decl = isa<ObjCMethodDecl>(D)
3956 ? getObjCMethodDeclaration(D, DIFnType, LineNo, Flags, SPFlags)
3957 : getFunctionDeclaration(D);
3958
3959 // FIXME: The function declaration we're constructing here is mostly reusing
3960 // declarations from CXXMethodDecl and not constructing new ones for arbitrary
3961 // FunctionDecls. When/if we fix this we can have FDContext be TheCU/null for
3962 // all subprograms instead of the actual context since subprogram definitions
3963 // are emitted as CU level entities by the backend.
3964 llvm::DISubprogram *SP = DBuilder.createFunction(
3965 FDContext, Name, LinkageName, Unit, LineNo, DIFnType, ScopeLine,
3966 FlagsForDef, SPFlagsForDef, TParamsArray.get(), Decl);
3967 Fn->setSubprogram(SP);
3968 // We might get here with a VarDecl in the case we're generating
3969 // code for the initialization of globals. Do not record these decls
3970 // as they will overwrite the actual VarDecl Decl in the cache.
3971 if (HasDecl && isa<FunctionDecl>(D))
3972 DeclCache[D->getCanonicalDecl()].reset(SP);
3973
3974 // Push the function onto the lexical block stack.
3975 LexicalBlockStack.emplace_back(SP);
3976
3977 if (HasDecl)
3978 RegionMap[D].reset(SP);
3979}
3980
3981void CGDebugInfo::EmitFunctionDecl(GlobalDecl GD, SourceLocation Loc,
3982 QualType FnType, llvm::Function *Fn) {
3983 StringRef Name;
3984 StringRef LinkageName;
3985
3986 const Decl *D = GD.getDecl();
3987 if (!D)
3988 return;
3989
3990 llvm::TimeTraceScope TimeScope("DebugFunction", [&]() {
3991 std::string Name;
3992 llvm::raw_string_ostream OS(Name);
3993 if (const NamedDecl *ND = dyn_cast<NamedDecl>(D))
3994 ND->getNameForDiagnostic(OS, getPrintingPolicy(),
3995 /*Qualified=*/true);
3996 return Name;
3997 });
3998
3999 llvm::DINode::DIFlags Flags = llvm::DINode::FlagZero;
4000 llvm::DIFile *Unit = getOrCreateFile(Loc);
4001 bool IsDeclForCallSite = Fn ? true : false;
4002 llvm::DIScope *FDContext =
4003 IsDeclForCallSite ? Unit : getDeclContextDescriptor(D);
4004 llvm::DINodeArray TParamsArray;
4005 if (isa<FunctionDecl>(D)) {
4006 // If there is a DISubprogram for this function available then use it.
4007 collectFunctionDeclProps(GD, Unit, Name, LinkageName, FDContext,
4008 TParamsArray, Flags);
4009 } else if (const auto *OMD = dyn_cast<ObjCMethodDecl>(D)) {
4010 Name = getObjCMethodName(OMD);
4011 Flags |= llvm::DINode::FlagPrototyped;
4012 } else {
4013 llvm_unreachable("not a function or ObjC method")::llvm::llvm_unreachable_internal("not a function or ObjC method"
, "/build/llvm-toolchain-snapshot-13~++20210405022414+5f57793c4fe4/clang/lib/CodeGen/CGDebugInfo.cpp"
, 4013)
;
4014 }
4015 if (!Name.empty() && Name[0] == '\01')
4016 Name = Name.substr(1);
4017
4018 if (D->isImplicit()) {
4019 Flags |= llvm::DINode::FlagArtificial;
4020 // Artificial functions without a location should not silently reuse CurLoc.
4021 if (Loc.isInvalid())
4022 CurLoc = SourceLocation();
4023 }
4024 unsigned LineNo = getLineNumber(Loc);
4025 unsigned ScopeLine = 0;
4026 llvm::DISubprogram::DISPFlags SPFlags = llvm::DISubprogram::SPFlagZero;
4027 if (CGM.getLangOpts().Optimize)
4028 SPFlags |= llvm::DISubprogram::SPFlagOptimized;
4029
4030 llvm::DISubprogram *SP = DBuilder.createFunction(
4031 FDContext, Name, LinkageName, Unit, LineNo,
4032 getOrCreateFunctionType(D, FnType, Unit), ScopeLine, Flags, SPFlags,
4033 TParamsArray.get(), getFunctionDeclaration(D));
4034
4035 if (IsDeclForCallSite)
4036 Fn->setSubprogram(SP);
4037
4038 DBuilder.finalizeSubprogram(SP);
4039}
4040
4041void CGDebugInfo::EmitFuncDeclForCallSite(llvm::CallBase *CallOrInvoke,
4042 QualType CalleeType,
4043 const FunctionDecl *CalleeDecl) {
4044 if (!CallOrInvoke)
4045 return;
4046 auto *Func = CallOrInvoke->getCalledFunction();
4047 if (!Func)
4048 return;
4049 if (Func->getSubprogram())
4050 return;
4051
4052 // Do not emit a declaration subprogram for a builtin, a function with nodebug
4053 // attribute, or if call site info isn't required. Also, elide declarations
4054 // for functions with reserved names, as call site-related features aren't
4055 // interesting in this case (& also, the compiler may emit calls to these
4056 // functions without debug locations, which makes the verifier complain).
4057 if (CalleeDecl->getBuiltinID() != 0 || CalleeDecl->hasAttr<NoDebugAttr>() ||
4058 getCallSiteRelatedAttrs() == llvm::DINode::FlagZero)
4059 return;
4060 if (const auto *Id = CalleeDecl->getIdentifier())
4061 if (Id->isReservedName())
4062 return;
4063
4064 // If there is no DISubprogram attached to the function being called,
4065 // create the one describing the function in order to have complete
4066 // call site debug info.
4067 if (!CalleeDecl->isStatic() && !CalleeDecl->isInlined())
4068 EmitFunctionDecl(CalleeDecl, CalleeDecl->getLocation(), CalleeType, Func);
4069}
4070
4071void CGDebugInfo::EmitInlineFunctionStart(CGBuilderTy &Builder, GlobalDecl GD) {
4072 const auto *FD = cast<FunctionDecl>(GD.getDecl());
4073 // If there is a subprogram for this function available then use it.
4074 auto FI = SPCache.find(FD->getCanonicalDecl());
4075 llvm::DISubprogram *SP = nullptr;
4076 if (FI != SPCache.end())
4077 SP = dyn_cast_or_null<llvm::DISubprogram>(FI->second);
4078 if (!SP || !SP->isDefinition())
4079 SP = getFunctionStub(GD);
4080 FnBeginRegionCount.push_back(LexicalBlockStack.size());
4081 LexicalBlockStack.emplace_back(SP);
4082 setInlinedAt(Builder.getCurrentDebugLocation());
4083 EmitLocation(Builder, FD->getLocation());
4084}
4085
4086void CGDebugInfo::EmitInlineFunctionEnd(CGBuilderTy &Builder) {
4087 assert(CurInlinedAt && "unbalanced inline scope stack")((CurInlinedAt && "unbalanced inline scope stack") ? static_cast
<void> (0) : __assert_fail ("CurInlinedAt && \"unbalanced inline scope stack\""
, "/build/llvm-toolchain-snapshot-13~++20210405022414+5f57793c4fe4/clang/lib/CodeGen/CGDebugInfo.cpp"
, 4087, __PRETTY_FUNCTION__))
;
4088 EmitFunctionEnd(Builder, nullptr);
4089 setInlinedAt(llvm::DebugLoc(CurInlinedAt).getInlinedAt());
4090}
4091
4092void CGDebugInfo::EmitLocation(CGBuilderTy &Builder, SourceLocation Loc) {
4093 // Update our current location
4094 setLocation(Loc);
4095
4096 if (CurLoc.isInvalid() || CurLoc.isMacroID() || LexicalBlockStack.empty())
4097 return;
4098
4099 llvm::MDNode *Scope = LexicalBlockStack.back();
4100 Builder.SetCurrentDebugLocation(
4101 llvm::DILocation::get(CGM.getLLVMContext(), getLineNumber(CurLoc),
4102 getColumnNumber(CurLoc), Scope, CurInlinedAt));
4103}
4104
4105void CGDebugInfo::CreateLexicalBlock(SourceLocation Loc) {
4106 llvm::MDNode *Back = nullptr;
4107 if (!LexicalBlockStack.empty())
4108 Back = LexicalBlockStack.back().get();
4109 LexicalBlockStack.emplace_back(DBuilder.createLexicalBlock(
4110 cast<llvm::DIScope>(Back), getOrCreateFile(CurLoc), getLineNumber(CurLoc),
4111 getColumnNumber(CurLoc)));
4112}
4113
4114void CGDebugInfo::AppendAddressSpaceXDeref(
4115 unsigned AddressSpace, SmallVectorImpl<int64_t> &Expr) const {
4116 Optional<unsigned> DWARFAddressSpace =
4117 CGM.getTarget().getDWARFAddressSpace(AddressSpace);
4118 if (!DWARFAddressSpace)
4119 return;
4120
4121 Expr.push_back(llvm::dwarf::DW_OP_constu);
4122 Expr.push_back(DWARFAddressSpace.getValue());
4123 Expr.push_back(llvm::dwarf::DW_OP_swap);
4124 Expr.push_back(llvm::dwarf::DW_OP_xderef);
4125}
4126
4127void CGDebugInfo::EmitLexicalBlockStart(CGBuilderTy &Builder,
4128 SourceLocation Loc) {
4129 // Set our current location.
4130 setLocation(Loc);
4131
4132 // Emit a line table change for the current location inside the new scope.
4133 Builder.SetCurrentDebugLocation(llvm::DILocation::get(
4134 CGM.getLLVMContext(), getLineNumber(Loc), getColumnNumber(Loc),
4135 LexicalBlockStack.back(), CurInlinedAt));
4136
4137 if (DebugKind <= codegenoptions::DebugLineTablesOnly)
4138 return;
4139
4140 // Create a new lexical block and push it on the stack.
4141 CreateLexicalBlock(Loc);
4142}
4143
4144void CGDebugInfo::EmitLexicalBlockEnd(CGBuilderTy &Builder,
4145 SourceLocation Loc) {
4146 assert(!LexicalBlockStack.empty() && "Region stack mismatch, stack empty!")((!LexicalBlockStack.empty() && "Region stack mismatch, stack empty!"
) ? static_cast<void> (0) : __assert_fail ("!LexicalBlockStack.empty() && \"Region stack mismatch, stack empty!\""
, "/build/llvm-toolchain-snapshot-13~++20210405022414+5f57793c4fe4/clang/lib/CodeGen/CGDebugInfo.cpp"
, 4146, __PRETTY_FUNCTION__))
;
4147
4148 // Provide an entry in the line table for the end of the block.
4149 EmitLocation(Builder, Loc);
4150
4151 if (DebugKind <= codegenoptions::DebugLineTablesOnly)
4152 return;
4153
4154 LexicalBlockStack.pop_back();
4155}
4156
4157void CGDebugInfo::EmitFunctionEnd(CGBuilderTy &Builder, llvm::Function *Fn) {
4158 assert(!LexicalBlockStack.empty() && "Region stack mismatch, stack empty!")((!LexicalBlockStack.empty() && "Region stack mismatch, stack empty!"
) ? static_cast<void> (0) : __assert_fail ("!LexicalBlockStack.empty() && \"Region stack mismatch, stack empty!\""
, "/build/llvm-toolchain-snapshot-13~++20210405022414+5f57793c4fe4/clang/lib/CodeGen/CGDebugInfo.cpp"
, 4158, __PRETTY_FUNCTION__))
;
4159 unsigned RCount = FnBeginRegionCount.back();
4160 assert(RCount <= LexicalBlockStack.size() && "Region stack mismatch")((RCount <= LexicalBlockStack.size() && "Region stack mismatch"
) ? static_cast<void> (0) : __assert_fail ("RCount <= LexicalBlockStack.size() && \"Region stack mismatch\""
, "/build/llvm-toolchain-snapshot-13~++20210405022414+5f57793c4fe4/clang/lib/CodeGen/CGDebugInfo.cpp"
, 4160, __PRETTY_FUNCTION__))
;
4161
4162 // Pop all regions for this function.
4163 while (LexicalBlockStack.size() != RCount) {
4164 // Provide an entry in the line table for the end of the block.
4165 EmitLocation(Builder, CurLoc);
4166 LexicalBlockStack.pop_back();
4167 }
4168 FnBeginRegionCount.pop_back();
4169
4170 if (Fn && Fn->getSubprogram())
4171 DBuilder.finalizeSubprogram(Fn->getSubprogram());
4172}
4173
4174CGDebugInfo::BlockByRefType
4175CGDebugInfo::EmitTypeForVarWithBlocksAttr(const VarDecl *VD,
4176 uint64_t *XOffset) {
4177 SmallVector<llvm::Metadata *, 5> EltTys;
4178 QualType FType;
4179 uint64_t FieldSize, FieldOffset;
4180 uint32_t FieldAlign;
4181
4182 llvm::DIFile *Unit = getOrCreateFile(VD->getLocation());
4183 QualType Type = VD->getType();
4184
4185 FieldOffset = 0;
4186 FType = CGM.getContext().getPointerType(CGM.getContext().VoidTy);
4187 EltTys.push_back(CreateMemberType(Unit, FType, "__isa", &FieldOffset));
4188 EltTys.push_back(CreateMemberType(Unit, FType, "__forwarding", &FieldOffset));
4189 FType = CGM.getContext().IntTy;
4190 EltTys.push_back(CreateMemberType(Unit, FType, "__flags", &FieldOffset));
4191 EltTys.push_back(CreateMemberType(Unit, FType, "__size", &FieldOffset));
4192
4193 bool HasCopyAndDispose = CGM.getContext().BlockRequiresCopying(Type, VD);
4194 if (HasCopyAndDispose) {
4195 FType = CGM.getContext().getPointerType(CGM.getContext().VoidTy);
4196 EltTys.push_back(
4197 CreateMemberType(Unit, FType, "__copy_helper", &FieldOffset));
4198 EltTys.push_back(
4199 CreateMemberType(Unit, FType, "__destroy_helper", &FieldOffset));
4200 }
4201 bool HasByrefExtendedLayout;
4202 Qualifiers::ObjCLifetime Lifetime;
4203 if (CGM.getContext().getByrefLifetime(Type, Lifetime,
4204 HasByrefExtendedLayout) &&
4205 HasByrefExtendedLayout) {
4206 FType = CGM.getContext().getPointerType(CGM.getContext().VoidTy);
4207 EltTys.push_back(
4208 CreateMemberType(Unit, FType, "__byref_variable_layout", &FieldOffset));
4209 }
4210
4211 CharUnits Align = CGM.getContext().getDeclAlign(VD);
4212 if (Align > CGM.getContext().toCharUnitsFromBits(
4213 CGM.getTarget().getPointerAlign(0))) {
4214 CharUnits FieldOffsetInBytes =
4215 CGM.getContext().toCharUnitsFromBits(FieldOffset);
4216 CharUnits AlignedOffsetInBytes = FieldOffsetInBytes.alignTo(Align);
4217 CharUnits NumPaddingBytes = AlignedOffsetInBytes - FieldOffsetInBytes;
4218
4219 if (NumPaddingBytes.isPositive()) {
4220 llvm::APInt pad(32, NumPaddingBytes.getQuantity());
4221 FType = CGM.getContext().getConstantArrayType(
4222 CGM.getContext().CharTy, pad, nullptr, ArrayType::Normal, 0);
4223 EltTys.push_back(CreateMemberType(Unit, FType, "", &FieldOffset));
4224 }
4225 }
4226
4227 FType = Type;
4228 llvm::DIType *WrappedTy = getOrCreateType(FType, Unit);
4229 FieldSize = CGM.getContext().getTypeSize(FType);
4230 FieldAlign = CGM.getContext().toBits(Align);
4231
4232 *XOffset = FieldOffset;
4233 llvm::DIType *FieldTy = DBuilder.createMemberType(
4234 Unit, VD->getName(), Unit, 0, FieldSize, FieldAlign, FieldOffset,
4235 llvm::DINode::FlagZero, WrappedTy);
4236 EltTys.push_back(FieldTy);
4237 FieldOffset += FieldSize;
4238
4239 llvm::DINodeArray Elements = DBuilder.getOrCreateArray(EltTys);
4240 return {DBuilder.createStructType(Unit, "", Unit, 0, FieldOffset, 0,
4241 llvm::DINode::FlagZero, nullptr, Elements),
4242 WrappedTy};
4243}
4244
4245llvm::DILocalVariable *CGDebugInfo::EmitDeclare(const VarDecl *VD,
4246 llvm::Value *Storage,
4247 llvm::Optional<unsigned> ArgNo,
4248 CGBuilderTy &Builder,
4249 const bool UsePointerValue) {
4250 assert(CGM.getCodeGenOpts().hasReducedDebugInfo())((CGM.getCodeGenOpts().hasReducedDebugInfo()) ? static_cast<
void> (0) : __assert_fail ("CGM.getCodeGenOpts().hasReducedDebugInfo()"
, "/build/llvm-toolchain-snapshot-13~++20210405022414+5f57793c4fe4/clang/lib/CodeGen/CGDebugInfo.cpp"
, 4250, __PRETTY_FUNCTION__))
;
4251 assert(!LexicalBlockStack.empty() && "Region stack mismatch, stack empty!")((!LexicalBlockStack.empty() && "Region stack mismatch, stack empty!"
) ? static_cast<void> (0) : __assert_fail ("!LexicalBlockStack.empty() && \"Region stack mismatch, stack empty!\""
, "/build/llvm-toolchain-snapshot-13~++20210405022414+5f57793c4fe4/clang/lib/CodeGen/CGDebugInfo.cpp"
, 4251, __PRETTY_FUNCTION__))
;
4252 if (VD->hasAttr<NoDebugAttr>())
4253 return nullptr;
4254
4255 bool Unwritten =
4256 VD->isImplicit() || (isa<Decl>(VD->getDeclContext()) &&
4257 cast<Decl>(VD->getDeclContext())->isImplicit());
4258 llvm::DIFile *Unit = nullptr;
4259 if (!Unwritten)
4260 Unit = getOrCreateFile(VD->getLocation());
4261 llvm::DIType *Ty;
4262 uint64_t XOffset = 0;
4263 if (VD->hasAttr<BlocksAttr>())
4264 Ty = EmitTypeForVarWithBlocksAttr(VD, &XOffset).WrappedType;
4265 else
4266 Ty = getOrCreateType(VD->getType(), Unit);
4267
4268 // If there is no debug info for this type then do not emit debug info
4269 // for this variable.
4270 if (!Ty)
4271 return nullptr;
4272
4273 // Get location information.
4274 unsigned Line = 0;
4275 unsigned Column = 0;
4276 if (!Unwritten) {
4277 Line = getLineNumber(VD->getLocation());
4278 Column = getColumnNumber(VD->getLocation());
4279 }
4280 SmallVector<int64_t, 13> Expr;
4281 llvm::DINode::DIFlags Flags = llvm::DINode::FlagZero;
4282 if (VD->isImplicit())
4283 Flags |= llvm::DINode::FlagArtificial;
4284
4285 auto Align = getDeclAlignIfRequired(VD, CGM.getContext());
4286
4287 unsigned AddressSpace = CGM.getContext().getTargetAddressSpace(VD->getType());
4288 AppendAddressSpaceXDeref(AddressSpace, Expr);
4289
4290 // If this is implicit parameter of CXXThis or ObjCSelf kind, then give it an
4291 // object pointer flag.
4292 if (const auto *IPD = dyn_cast<ImplicitParamDecl>(VD)) {
4293 if (IPD->getParameterKind() == ImplicitParamDecl::CXXThis ||
4294 IPD->getParameterKind() == ImplicitParamDecl::ObjCSelf)
4295 Flags |= llvm::DINode::FlagObjectPointer;
4296 }
4297
4298 // Note: Older versions of clang used to emit byval references with an extra
4299 // DW_OP_deref, because they referenced the IR arg directly instead of
4300 // referencing an alloca. Newer versions of LLVM don't treat allocas
4301 // differently from other function arguments when used in a dbg.declare.
4302 auto *Scope = cast<llvm::DIScope>(LexicalBlockStack.back());
4303 StringRef Name = VD->getName();
4304 if (!Name.empty()) {
4305 if (VD->hasAttr<BlocksAttr>()) {
4306 // Here, we need an offset *into* the alloca.
4307 CharUnits offset = CharUnits::fromQuantity(32);
4308 Expr.push_back(llvm::dwarf::DW_OP_plus_uconst);
4309 // offset of __forwarding field
4310 offset = CGM.getContext().toCharUnitsFromBits(
4311 CGM.getTarget().getPointerWidth(0));
4312 Expr.push_back(offset.getQuantity());
4313 Expr.push_back(llvm::dwarf::DW_OP_deref);
4314 Expr.push_back(llvm::dwarf::DW_OP_plus_uconst);
4315 // offset of x field
4316 offset = CGM.getContext().toCharUnitsFromBits(XOffset);
4317 Expr.push_back(offset.getQuantity());
4318 }
4319 } else if (const auto *RT = dyn_cast<RecordType>(VD->getType())) {
4320 // If VD is an anonymous union then Storage represents value for
4321 // all union fields.
4322 const RecordDecl *RD = RT->getDecl();
4323 if (RD->isUnion() && RD->isAnonymousStructOrUnion()) {
4324 // GDB has trouble finding local variables in anonymous unions, so we emit
4325 // artificial local variables for each of the members.
4326 //
4327 // FIXME: Remove this code as soon as GDB supports this.
4328 // The debug info verifier in LLVM operates based on the assumption that a
4329 // variable has the same size as its storage and we had to disable the
4330 // check for artificial variables.
4331 for (const auto *Field : RD->fields()) {
4332 llvm::DIType *FieldTy = getOrCreateType(Field->getType(), Unit);
4333 StringRef FieldName = Field->getName();
4334
4335 // Ignore unnamed fields. Do not ignore unnamed records.
4336 if (FieldName.empty() && !isa<RecordType>(Field->getType()))
4337 continue;
4338
4339 // Use VarDecl's Tag, Scope and Line number.
4340 auto FieldAlign = getDeclAlignIfRequired(Field, CGM.getContext());
4341 auto *D = DBuilder.createAutoVariable(
4342 Scope, FieldName, Unit, Line, FieldTy, CGM.getLangOpts().Optimize,
4343 Flags | llvm::DINode::FlagArtificial, FieldAlign);
4344
4345 // Insert an llvm.dbg.declare into the current block.
4346 DBuilder.insertDeclare(Storage, D, DBuilder.createExpression(Expr),
4347 llvm::DILocation::get(CGM.getLLVMContext(), Line,
4348 Column, Scope,
4349 CurInlinedAt),
4350 Builder.GetInsertBlock());
4351 }
4352 }
4353 }
4354
4355 // Clang stores the sret pointer provided by the caller in a static alloca.
4356 // Use DW_OP_deref to tell the debugger to load the pointer and treat it as
4357 // the address of the variable.
4358 if (UsePointerValue) {
4359 assert(std::find(Expr.begin(), Expr.end(), llvm::dwarf::DW_OP_deref) ==((std::find(Expr.begin(), Expr.end(), llvm::dwarf::DW_OP_deref
) == Expr.end() && "Debug info already contains DW_OP_deref."
) ? static_cast<void> (0) : __assert_fail ("std::find(Expr.begin(), Expr.end(), llvm::dwarf::DW_OP_deref) == Expr.end() && \"Debug info already contains DW_OP_deref.\""
, "/build/llvm-toolchain-snapshot-13~++20210405022414+5f57793c4fe4/clang/lib/CodeGen/CGDebugInfo.cpp"
, 4361, __PRETTY_FUNCTION__))
4360 Expr.end() &&((std::find(Expr.begin(), Expr.end(), llvm::dwarf::DW_OP_deref
) == Expr.end() && "Debug info already contains DW_OP_deref."
) ? static_cast<void> (0) : __assert_fail ("std::find(Expr.begin(), Expr.end(), llvm::dwarf::DW_OP_deref) == Expr.end() && \"Debug info already contains DW_OP_deref.\""
, "/build/llvm-toolchain-snapshot-13~++20210405022414+5f57793c4fe4/clang/lib/CodeGen/CGDebugInfo.cpp"
, 4361, __PRETTY_FUNCTION__))
4361 "Debug info already contains DW_OP_deref.")((std::find(Expr.begin(), Expr.end(), llvm::dwarf::DW_OP_deref
) == Expr.end() && "Debug info already contains DW_OP_deref."
) ? static_cast<void> (0) : __assert_fail ("std::find(Expr.begin(), Expr.end(), llvm::dwarf::DW_OP_deref) == Expr.end() && \"Debug info already contains DW_OP_deref.\""
, "/build/llvm-toolchain-snapshot-13~++20210405022414+5f57793c4fe4/clang/lib/CodeGen/CGDebugInfo.cpp"
, 4361, __PRETTY_FUNCTION__))
;
4362 Expr.push_back(llvm::dwarf::DW_OP_deref);
4363 }
4364
4365 // Create the descriptor for the variable.
4366 auto *D = ArgNo ? DBuilder.createParameterVariable(
4367 Scope, Name, *ArgNo, Unit, Line, Ty,
4368 CGM.getLangOpts().Optimize, Flags)
4369 : DBuilder.createAutoVariable(Scope, Name, Unit, Line, Ty,
4370 CGM.getLangOpts().Optimize,
4371 Flags, Align);
4372
4373 // Insert an llvm.dbg.declare into the current block.
4374 DBuilder.insertDeclare(Storage, D, DBuilder.createExpression(Expr),
4375 llvm::DILocation::get(CGM.getLLVMContext(), Line,
4376 Column, Scope, CurInlinedAt),
4377 Builder.GetInsertBlock());
4378
4379 return D;
4380}
4381
4382llvm::DILocalVariable *
4383CGDebugInfo::EmitDeclareOfAutoVariable(const VarDecl *VD, llvm::Value *Storage,
4384 CGBuilderTy &Builder,
4385 const bool UsePointerValue) {
4386 assert(CGM.getCodeGenOpts().hasReducedDebugInfo())((CGM.getCodeGenOpts().hasReducedDebugInfo()) ? static_cast<
void> (0) : __assert_fail ("CGM.getCodeGenOpts().hasReducedDebugInfo()"
, "/build/llvm-toolchain-snapshot-13~++20210405022414+5f57793c4fe4/clang/lib/CodeGen/CGDebugInfo.cpp"
, 4386, __PRETTY_FUNCTION__))
;
4387 return EmitDeclare(VD, Storage, llvm::None, Builder, UsePointerValue);
4388}
4389
4390void CGDebugInfo::EmitLabel(const LabelDecl *D, CGBuilderTy &Builder) {
4391 assert(CGM.getCodeGenOpts().hasReducedDebugInfo())((CGM.getCodeGenOpts().hasReducedDebugInfo()) ? static_cast<
void> (0) : __assert_fail ("CGM.getCodeGenOpts().hasReducedDebugInfo()"
, "/build/llvm-toolchain-snapshot-13~++20210405022414+5f57793c4fe4/clang/lib/CodeGen/CGDebugInfo.cpp"
, 4391, __PRETTY_FUNCTION__))
;
4392 assert(!LexicalBlockStack.empty() && "Region stack mismatch, stack empty!")((!LexicalBlockStack.empty() && "Region stack mismatch, stack empty!"
) ? static_cast<void> (0) : __assert_fail ("!LexicalBlockStack.empty() && \"Region stack mismatch, stack empty!\""
, "/build/llvm-toolchain-snapshot-13~++20210405022414+5f57793c4fe4/clang/lib/CodeGen/CGDebugInfo.cpp"
, 4392, __PRETTY_FUNCTION__))
;
4393
4394 if (D->hasAttr<NoDebugAttr>())
4395 return;
4396
4397 auto *Scope = cast<llvm::DIScope>(LexicalBlockStack.back());
4398 llvm::DIFile *Unit = getOrCreateFile(D->getLocation());
4399
4400 // Get location information.
4401 unsigned Line = getLineNumber(D->getLocation());
4402 unsigned Column = getColumnNumber(D->getLocation());
4403
4404 StringRef Name = D->getName();
4405
4406 // Create the descriptor for the label.
4407 auto *L =
4408 DBuilder.createLabel(Scope, Name, Unit, Line, CGM.getLangOpts().Optimize);
4409
4410 // Insert an llvm.dbg.label into the current block.
4411 DBuilder.insertLabel(L,
4412 llvm::DILocation::get(CGM.getLLVMContext(), Line, Column,
4413 Scope, CurInlinedAt),
4414 Builder.GetInsertBlock());
4415}
4416
4417llvm::DIType *CGDebugInfo::CreateSelfType(const QualType &QualTy,
4418 llvm::DIType *Ty) {
4419 llvm::DIType *CachedTy = getTypeOrNull(QualTy);
4420 if (CachedTy)
4421 Ty = CachedTy;
4422 return DBuilder.createObjectPointerType(Ty);
4423}
4424
4425void CGDebugInfo::EmitDeclareOfBlockDeclRefVariable(
4426 const VarDecl *VD, llvm::Value *Storage, CGBuilderTy &Builder,
4427 const CGBlockInfo &blockInfo, llvm::Instruction *InsertPoint) {
4428 assert(CGM.getCodeGenOpts().hasReducedDebugInfo())((CGM.getCodeGenOpts().hasReducedDebugInfo()) ? static_cast<
void> (0) : __assert_fail ("CGM.getCodeGenOpts().hasReducedDebugInfo()"
, "/build/llvm-toolchain-snapshot-13~++20210405022414+5f57793c4fe4/clang/lib/CodeGen/CGDebugInfo.cpp"
, 4428, __PRETTY_FUNCTION__))
;
4429 assert(!LexicalBlockStack.empty() && "Region stack mismatch, stack empty!")((!LexicalBlockStack.empty() && "Region stack mismatch, stack empty!"
) ? static_cast<void> (0) : __assert_fail ("!LexicalBlockStack.empty() && \"Region stack mismatch, stack empty!\""
, "/build/llvm-toolchain-snapshot-13~++20210405022414+5f57793c4fe4/clang/lib/CodeGen/CGDebugInfo.cpp"
, 4429, __PRETTY_FUNCTION__))
;
4430
4431 if (Builder.GetInsertBlock() == nullptr)
4432 return;
4433 if (VD->hasAttr<NoDebugAttr>())
4434 return;
4435
4436 bool isByRef = VD->hasAttr<BlocksAttr>();
4437
4438 uint64_t XOffset = 0;
4439 llvm::DIFile *Unit = getOrCreateFile(VD->getLocation());
4440 llvm::DIType *Ty;
4441 if (isByRef)
4442 Ty = EmitTypeForVarWithBlocksAttr(VD, &XOffset).WrappedType;
4443 else
4444 Ty = getOrCreateType(VD->getType(), Unit);
4445
4446 // Self is passed along as an implicit non-arg variable in a
4447 // block. Mark it as the object pointer.
4448 if (const auto *IPD = dyn_cast<ImplicitParamDecl>(VD))
4449 if (IPD->getParameterKind() == ImplicitParamDecl::ObjCSelf)
4450 Ty = CreateSelfType(VD->getType(), Ty);
4451
4452 // Get location information.
4453 const unsigned Line =
4454 getLineNumber(VD->getLocation().isValid() ? VD->getLocation() : CurLoc);
4455 unsigned Column = getColumnNumber(VD->getLocation());
4456
4457 const llvm::DataLayout &target = CGM.getDataLayout();
4458
4459 CharUnits offset = CharUnits::fromQuantity(
4460 target.getStructLayout(blockInfo.StructureType)
4461 ->getElementOffset(blockInfo.getCapture(VD).getIndex()));
4462
4463 SmallVector<int64_t, 9> addr;
4464 addr.push_back(llvm::dwarf::DW_OP_deref);
4465 addr.push_back(llvm::dwarf::DW_OP_plus_uconst);
4466 addr.push_back(offset.getQuantity());
4467 if (isByRef) {
4468 addr.push_back(llvm::dwarf::DW_OP_deref);
4469 addr.push_back(llvm::dwarf::DW_OP_plus_uconst);
4470 // offset of __forwarding field
4471 offset =
4472 CGM.getContext().toCharUnitsFromBits(target.getPointerSizeInBits(0));
4473 addr.push_back(offset.getQuantity());
4474 addr.push_back(llvm::dwarf::DW_OP_deref);
4475 addr.push_back(llvm::dwarf::DW_OP_plus_uconst);
4476 // offset of x field
4477 offset = CGM.getContext().toCharUnitsFromBits(XOffset);
4478 addr.push_back(offset.getQuantity());
4479 }
4480
4481 // Create the descriptor for the variable.
4482 auto Align = getDeclAlignIfRequired(VD, CGM.getContext());
4483 auto *D = DBuilder.createAutoVariable(
4484 cast<llvm::DILocalScope>(LexicalBlockStack.back()), VD->getName(), Unit,
4485 Line, Ty, false, llvm::DINode::FlagZero, Align);
4486
4487 // Insert an llvm.dbg.declare into the current block.
4488 auto DL = llvm::DILocation::get(CGM.getLLVMContext(), Line, Column,
4489 LexicalBlockStack.back(), CurInlinedAt);
4490 auto *Expr = DBuilder.createExpression(addr);
4491 if (InsertPoint)
4492 DBuilder.insertDeclare(Storage, D, Expr, DL, InsertPoint);
4493 else
4494 DBuilder.insertDeclare(Storage, D, Expr, DL, Builder.GetInsertBlock());
4495}
4496
4497void CGDebugInfo::EmitDeclareOfArgVariable(const VarDecl *VD, llvm::Value *AI,
4498 unsigned ArgNo,
4499 CGBuilderTy &Builder) {
4500 assert(CGM.getCodeGenOpts().hasReducedDebugInfo())((CGM.getCodeGenOpts().hasReducedDebugInfo()) ? static_cast<
void> (0) : __assert_fail ("CGM.getCodeGenOpts().hasReducedDebugInfo()"
, "/build/llvm-toolchain-snapshot-13~++20210405022414+5f57793c4fe4/clang/lib/CodeGen/CGDebugInfo.cpp"
, 4500, __PRETTY_FUNCTION__))
;
4501 EmitDeclare(VD, AI, ArgNo, Builder);
4502}
4503
4504namespace {
4505struct BlockLayoutChunk {
4506 uint64_t OffsetInBits;
4507 const BlockDecl::Capture *Capture;
4508};
4509bool operator<(const BlockLayoutChunk &l, const BlockLayoutChunk &r) {
4510 return l.OffsetInBits < r.OffsetInBits;
4511}
4512} // namespace
4513
4514void CGDebugInfo::collectDefaultFieldsForBlockLiteralDeclare(
4515 const CGBlockInfo &Block, const ASTContext &Context, SourceLocation Loc,
4516 const llvm::StructLayout &BlockLayout, llvm::DIFile *Unit,
4517 SmallVectorImpl<llvm::Metadata *> &Fields) {
4518 // Blocks in OpenCL have unique constraints which make the standard fields
4519 // redundant while requiring size and align fields for enqueue_kernel. See
4520 // initializeForBlockHeader in CGBlocks.cpp
4521 if (CGM.getLangOpts().OpenCL) {
4522 Fields.push_back(createFieldType("__size", Context.IntTy, Loc, AS_public,
4523 BlockLayout.getElementOffsetInBits(0),
4524 Unit, Unit));
4525 Fields.push_back(createFieldType("__align", Context.IntTy, Loc, AS_public,
4526 BlockLayout.getElementOffsetInBits(1),
4527 Unit, Unit));
4528 } else {
4529 Fields.push_back(createFieldType("__isa", Context.VoidPtrTy, Loc, AS_public,
4530 BlockLayout.getElementOffsetInBits(0),
4531 Unit, Unit));
4532 Fields.push_back(createFieldType("__flags", Context.IntTy, Loc, AS_public,
4533 BlockLayout.getElementOffsetInBits(1),
4534 Unit, Unit));
4535 Fields.push_back(
4536 createFieldType("__reserved", Context.IntTy, Loc, AS_public,
4537 BlockLayout.getElementOffsetInBits(2), Unit, Unit));
4538 auto *FnTy = Block.getBlockExpr()->getFunctionType();
4539 auto FnPtrType = CGM.getContext().getPointerType(FnTy->desugar());
4540 Fields.push_back(createFieldType("__FuncPtr", FnPtrType, Loc, AS_public,
4541 BlockLayout.getElementOffsetInBits(3),
4542 Unit, Unit));
4543 Fields.push_back(createFieldType(
4544 "__descriptor",
4545 Context.getPointerType(Block.NeedsCopyDispose
4546 ? Context.getBlockDescriptorExtendedType()
4547 : Context.getBlockDescriptorType()),
4548 Loc, AS_public, BlockLayout.getElementOffsetInBits(4), Unit, Unit));
4549 }
4550}
4551
4552void CGDebugInfo::EmitDeclareOfBlockLiteralArgVariable(const CGBlockInfo &block,
4553 StringRef Name,
4554 unsigned ArgNo,
4555 llvm::AllocaInst *Alloca,
4556 CGBuilderTy &Builder) {
4557 assert(CGM.getCodeGenOpts().hasReducedDebugInfo())((CGM.getCodeGenOpts().hasReducedDebugInfo()) ? static_cast<
void> (0) : __assert_fail ("CGM.getCodeGenOpts().hasReducedDebugInfo()"
, "/build/llvm-toolchain-snapshot-13~++20210405022414+5f57793c4fe4/clang/lib/CodeGen/CGDebugInfo.cpp"
, 4557, __PRETTY_FUNCTION__))
;
4558 ASTContext &C = CGM.getContext();
4559 const BlockDecl *blockDecl = block.getBlockDecl();
4560
4561 // Collect some general information about the block's location.
4562 SourceLocation loc = blockDecl->getCaretLocation();
4563 llvm::DIFile *tunit = getOrCreateFile(loc);
4564 unsigned line = getLineNumber(loc);
4565 unsigned column = getColumnNumber(loc);
4566
4567 // Build the debug-info type for the block literal.
4568 getDeclContextDescriptor(blockDecl);
4569
4570 const llvm::StructLayout *blockLayout =
4571 CGM.getDataLayout().getStructLayout(block.StructureType);
4572
4573 SmallVector<llvm::Metadata *, 16> fields;
4574 collectDefaultFieldsForBlockLiteralDeclare(block, C, loc, *blockLayout, tunit,
4575 fields);
4576
4577 // We want to sort the captures by offset, not because DWARF
4578 // requires this, but because we're paranoid about debuggers.
4579 SmallVector<BlockLayoutChunk, 8> chunks;
4580
4581 // 'this' capture.
4582 if (blockDecl->capturesCXXThis()) {
4583 BlockLayoutChunk chunk;
4584 chunk.OffsetInBits =
4585 blockLayout->getElementOffsetInBits(block.CXXThisIndex);
4586 chunk.Capture = nullptr;
4587 chunks.push_back(chunk);
4588 }
4589
4590 // Variable captures.
4591 for (const auto &capture : blockDecl->captures()) {
4592 const VarDecl *variable = capture.getVariable();
4593 const CGBlockInfo::Capture &captureInfo = block.getCapture(variable);
4594
4595 // Ignore constant captures.
4596 if (captureInfo.isConstant())
4597 continue;
4598
4599 BlockLayoutChunk chunk;
4600 chunk.OffsetInBits =
4601 blockLayout->getElementOffsetInBits(captureInfo.getIndex());
4602 chunk.Capture = &capture;
4603 chunks.push_back(chunk);
4604 }
4605
4606 // Sort by offset.
4607 llvm::array_pod_sort(chunks.begin(), chunks.end());
4608
4609 for (const BlockLayoutChunk &Chunk : chunks) {
4610 uint64_t offsetInBits = Chunk.OffsetInBits;
4611 const BlockDecl::Capture *capture = Chunk.Capture;
4612
4613 // If we have a null capture, this must be the C++ 'this' capture.
4614 if (!capture) {
4615 QualType type;
4616 if (auto *Method =
4617 cast_or_null<CXXMethodDecl>(blockDecl->getNonClosureContext()))
4618 type = Method->getThisType();
4619 else if (auto *RDecl = dyn_cast<CXXRecordDecl>(blockDecl->getParent()))
4620 type = QualType(RDecl->getTypeForDecl(), 0);
4621 else
4622 llvm_unreachable("unexpected block declcontext")::llvm::llvm_unreachable_internal("unexpected block declcontext"
, "/build/llvm-toolchain-snapshot-13~++20210405022414+5f57793c4fe4/clang/lib/CodeGen/CGDebugInfo.cpp"
, 4622)
;
4623
4624 fields.push_back(createFieldType("this", type, loc, AS_public,
4625 offsetInBits, tunit, tunit));
4626 continue;
4627 }
4628
4629 const VarDecl *variable = capture->getVariable();
4630 StringRef name = variable->getName();
4631
4632 llvm::DIType *fieldType;
4633 if (capture->isByRef()) {
4634 TypeInfo PtrInfo = C.getTypeInfo(C.VoidPtrTy);
4635 auto Align = PtrInfo.AlignIsRequired ? PtrInfo.Align : 0;
4636 // FIXME: This recomputes the layout of the BlockByRefWrapper.
4637 uint64_t xoffset;
4638 fieldType =
4639 EmitTypeForVarWithBlocksAttr(variable, &xoffset).BlockByRefWrapper;
4640 fieldType = DBuilder.createPointerType(fieldType, PtrInfo.Width);
4641 fieldType = DBuilder.createMemberType(tunit, name, tunit, line,
4642 PtrInfo.Width, Align, offsetInBits,
4643 llvm::DINode::FlagZero, fieldType);
4644 } else {
4645 auto Align = getDeclAlignIfRequired(variable, CGM.getContext());
4646 fieldType = createFieldType(name, variable->getType(), loc, AS_public,
4647 offsetInBits, Align, tunit, tunit);
4648 }
4649 fields.push_back(fieldType);
4650 }
4651
4652 SmallString<36> typeName;
4653 llvm::raw_svector_ostream(typeName)
4654 << "__block_literal_" << CGM.getUniqueBlockCount();
4655
4656 llvm::DINodeArray fieldsArray = DBuilder.getOrCreateArray(fields);
4657
4658 llvm::DIType *type =
4659 DBuilder.createStructType(tunit, typeName.str(), tunit, line,
4660 CGM.getContext().toBits(block.BlockSize), 0,
4661 llvm::DINode::FlagZero, nullptr, fieldsArray);
4662 type = DBuilder.createPointerType(type, CGM.PointerWidthInBits);
4663
4664 // Get overall information about the block.
4665 llvm::DINode::DIFlags flags = llvm::DINode::FlagArtificial;
4666 auto *scope = cast<llvm::DILocalScope>(LexicalBlockStack.back());
4667
4668 // Create the descriptor for the parameter.
4669 auto *debugVar = DBuilder.createParameterVariable(
4670 scope, Name, ArgNo, tunit, line, type, CGM.getLangOpts().Optimize, flags);
4671
4672 // Insert an llvm.dbg.declare into the current block.
4673 DBuilder.insertDeclare(Alloca, debugVar, DBuilder.createExpression(),
4674 llvm::DILocation::get(CGM.getLLVMContext(), line,
4675 column, scope, CurInlinedAt),
4676 Builder.GetInsertBlock());
4677}
4678
4679llvm::DIDerivedType *
4680CGDebugInfo::getOrCreateStaticDataMemberDeclarationOrNull(const VarDecl *D) {
4681 if (!D || !D->isStaticDataMember())
4682 return nullptr;
4683
4684 auto MI = StaticDataMemberCache.find(D->getCanonicalDecl());
4685 if (MI != StaticDataMemberCache.end()) {
4686 assert(MI->second && "Static data member declaration should still exist")((MI->second && "Static data member declaration should still exist"
) ? static_cast<void> (0) : __assert_fail ("MI->second && \"Static data member declaration should still exist\""
, "/build/llvm-toolchain-snapshot-13~++20210405022414+5f57793c4fe4/clang/lib/CodeGen/CGDebugInfo.cpp"
, 4686, __PRETTY_FUNCTION__))
;
4687 return MI->second;
4688 }
4689
4690 // If the member wasn't found in the cache, lazily construct and add it to the
4691 // type (used when a limited form of the type is emitted).
4692 auto DC = D->getDeclContext();
4693 auto *Ctxt = cast<llvm::DICompositeType>(getDeclContextDescriptor(D));
4694 return CreateRecordStaticField(D, Ctxt, cast<RecordDecl>(DC));
4695}
4696
4697llvm::DIGlobalVariableExpression *CGDebugInfo::CollectAnonRecordDecls(
4698 const RecordDecl *RD, llvm::DIFile *Unit, unsigned LineNo,
4699 StringRef LinkageName, llvm::GlobalVariable *Var, llvm::DIScope *DContext) {
4700 llvm::DIGlobalVariableExpression *GVE = nullptr;
4701
4702 for (const auto *Field : RD->fields()) {
4703 llvm::DIType *FieldTy = getOrCreateType(Field->getType(), Unit);
4704 StringRef FieldName = Field->getName();
4705
4706 // Ignore unnamed fields, but recurse into anonymous records.
4707 if (FieldName.empty()) {
4708 if (const auto *RT = dyn_cast<RecordType>(Field->getType()))
4709 GVE = CollectAnonRecordDecls(RT->getDecl(), Unit, LineNo, LinkageName,
4710 Var, DContext);
4711 continue;
4712 }
4713 // Use VarDecl's Tag, Scope and Line number.
4714 GVE = DBuilder.createGlobalVariableExpression(
4715 DContext, FieldName, LinkageName, Unit, LineNo, FieldTy,
4716 Var->hasLocalLinkage());
4717 Var->addDebugInfo(GVE);
4718 }
4719 return GVE;
4720}
4721
4722void CGDebugInfo::EmitGlobalVariable(llvm::GlobalVariable *Var,
4723 const VarDecl *D) {
4724 assert(CGM.getCodeGenOpts().hasReducedDebugInfo())((CGM.getCodeGenOpts().hasReducedDebugInfo()) ? static_cast<
void> (0) : __assert_fail ("CGM.getCodeGenOpts().hasReducedDebugInfo()"
, "/build/llvm-toolchain-snapshot-13~++20210405022414+5f57793c4fe4/clang/lib/CodeGen/CGDebugInfo.cpp"
, 4724, __PRETTY_FUNCTION__))
;
4725 if (D->hasAttr<NoDebugAttr>())
4726 return;
4727
4728 llvm::TimeTraceScope TimeScope("DebugGlobalVariable", [&]() {
4729 std::string Name;
4730 llvm::raw_string_ostream OS(Name);
4731 D->getNameForDiagnostic(OS, getPrintingPolicy(),
4732 /*Qualified=*/true);
4733 return Name;
4734 });
4735
4736 // If we already created a DIGlobalVariable for this declaration, just attach
4737 // it to the llvm::GlobalVariable.
4738 auto Cached = DeclCache.find(D->getCanonicalDecl());
4739 if (Cached != DeclCache.end())
4740 return Var->addDebugInfo(
4741 cast<llvm::DIGlobalVariableExpression>(Cached->second));
4742
4743 // Create global variable debug descriptor.
4744 llvm::DIFile *Unit = nullptr;
4745 llvm::DIScope *DContext = nullptr;
4746 unsigned LineNo;
4747 StringRef DeclName, LinkageName;
4748 QualType T;
4749 llvm::MDTuple *TemplateParameters = nullptr;
4750 collectVarDeclProps(D, Unit, LineNo, T, DeclName, LinkageName,
4751 TemplateParameters, DContext);
4752
4753 // Attempt to store one global variable for the declaration - even if we
4754 // emit a lot of fields.
4755 llvm::DIGlobalVariableExpression *GVE = nullptr;
4756
4757 // If this is an anonymous union then we'll want to emit a global
4758 // variable for each member of the anonymous union so that it's possible
4759 // to find the name of any field in the union.
4760 if (T->isUnionType() && DeclName.empty()) {
4761 const RecordDecl *RD = T->castAs<RecordType>()->getDecl();
4762 assert(RD->isAnonymousStructOrUnion() &&((RD->isAnonymousStructOrUnion() && "unnamed non-anonymous struct or union?"
) ? static_cast<void> (0) : __assert_fail ("RD->isAnonymousStructOrUnion() && \"unnamed non-anonymous struct or union?\""
, "/build/llvm-toolchain-snapshot-13~++20210405022414+5f57793c4fe4/clang/lib/CodeGen/CGDebugInfo.cpp"
, 4763, __PRETTY_FUNCTION__))
4763 "unnamed non-anonymous struct or union?")((RD->isAnonymousStructOrUnion() && "unnamed non-anonymous struct or union?"
) ? static_cast<void> (0) : __assert_fail ("RD->isAnonymousStructOrUnion() && \"unnamed non-anonymous struct or union?\""
, "/build/llvm-toolchain-snapshot-13~++20210405022414+5f57793c4fe4/clang/lib/CodeGen/CGDebugInfo.cpp"
, 4763, __PRETTY_FUNCTION__))
;
4764 GVE = CollectAnonRecordDecls(RD, Unit, LineNo, LinkageName, Var, DContext);
4765 } else {
4766 auto Align = getDeclAlignIfRequired(D, CGM.getContext());
4767
4768 SmallVector<int64_t, 4> Expr;
4769 unsigned AddressSpace =
4770 CGM.getContext().getTargetAddressSpace(D->getType());
4771 if (CGM.getLangOpts().CUDA && CGM.getLangOpts().CUDAIsDevice) {
4772 if (D->hasAttr<CUDASharedAttr>())
4773 AddressSpace =
4774 CGM.getContext().getTargetAddressSpace(LangAS::cuda_shared);
4775 else if (D->hasAttr<CUDAConstantAttr>())
4776 AddressSpace =
4777 CGM.getContext().getTargetAddressSpace(LangAS::cuda_constant);
4778 }
4779 AppendAddressSpaceXDeref(AddressSpace, Expr);
4780
4781 GVE = DBuilder.createGlobalVariableExpression(
4782 DContext, DeclName, LinkageName, Unit, LineNo, getOrCreateType(T, Unit),
4783 Var->hasLocalLinkage(), true,
4784 Expr.empty() ? nullptr : DBuilder.createExpression(Expr),
4785 getOrCreateStaticDataMemberDeclarationOrNull(D), TemplateParameters,
4786 Align);
4787 Var->addDebugInfo(GVE);
4788 }
4789 DeclCache[D->getCanonicalDecl()].reset(GVE);
4790}
4791
4792void CGDebugInfo::EmitGlobalVariable(const ValueDecl *VD, const APValue &Init) {
4793 assert(CGM.getCodeGenOpts().hasReducedDebugInfo())((CGM.getCodeGenOpts().hasReducedDebugInfo()) ? static_cast<
void> (0) : __assert_fail ("CGM.getCodeGenOpts().hasReducedDebugInfo()"
, "/build/llvm-toolchain-snapshot-13~++20210405022414+5f57793c4fe4/clang/lib/CodeGen/CGDebugInfo.cpp"
, 4793, __PRETTY_FUNCTION__))
;
4794 if (VD->hasAttr<NoDebugAttr>())
4795 return;
4796 llvm::TimeTraceScope TimeScope("DebugConstGlobalVariable", [&]() {
4797 std::string Name;
4798 llvm::raw_string_ostream OS(Name);
4799 VD->getNameForDiagnostic(OS, getPrintingPolicy(),
4800 /*Qualified=*/true);
4801 return Name;
4802 });
4803
4804 auto Align = getDeclAlignIfRequired(VD, CGM.getContext());
4805 // Create the descriptor for the variable.
4806 llvm::DIFile *Unit = getOrCreateFile(VD->getLocation());
4807 StringRef Name = VD->getName();
4808 llvm::DIType *Ty = getOrCreateType(VD->getType(), Unit);
4809
4810 if (const auto *ECD = dyn_cast<EnumConstantDecl>(VD)) {
4811 const auto *ED = cast<EnumDecl>(ECD->getDeclContext());
4812 assert(isa<EnumType>(ED->getTypeForDecl()) && "Enum without EnumType?")((isa<EnumType>(ED->getTypeForDecl()) && "Enum without EnumType?"
) ? static_cast<void> (0) : __assert_fail ("isa<EnumType>(ED->getTypeForDecl()) && \"Enum without EnumType?\""
, "/build/llvm-toolchain-snapshot-13~++20210405022414+5f57793c4fe4/clang/lib/CodeGen/CGDebugInfo.cpp"
, 4812, __PRETTY_FUNCTION__))
;
4813
4814 if (CGM.getCodeGenOpts().EmitCodeView) {
4815 // If CodeView, emit enums as global variables, unless they are defined
4816 // inside a class. We do this because MSVC doesn't emit S_CONSTANTs for
4817 // enums in classes, and because it is difficult to attach this scope
4818 // information to the global variable.
4819 if (isa<RecordDecl>(ED->getDeclContext()))
4820 return;
4821 } else {
4822 // If not CodeView, emit DW_TAG_enumeration_type if necessary. For
4823 // example: for "enum { ZERO };", a DW_TAG_enumeration_type is created the
4824 // first time `ZERO` is referenced in a function.
4825 llvm::DIType *EDTy =
4826 getOrCreateType(QualType(ED->getTypeForDecl(), 0), Unit);
4827 assert (EDTy->getTag() == llvm::dwarf::DW_TAG_enumeration_type)((EDTy->getTag() == llvm::dwarf::DW_TAG_enumeration_type) ?
static_cast<void> (0) : __assert_fail ("EDTy->getTag() == llvm::dwarf::DW_TAG_enumeration_type"
, "/build/llvm-toolchain-snapshot-13~++20210405022414+5f57793c4fe4/clang/lib/CodeGen/CGDebugInfo.cpp"
, 4827, __PRETTY_FUNCTION__))
;
4828 (void)EDTy;
4829 return;
4830 }
4831 }
4832
4833 // Do not emit separate definitions for function local consts.
4834 if (isa<FunctionDecl>(VD->getDeclContext()))
4835 return;
4836
4837 VD = cast<ValueDecl>(VD->getCanonicalDecl());
4838 auto *VarD = dyn_cast<VarDecl>(VD);
4839 if (VarD && VarD->isStaticDataMember()) {
4840 auto *RD = cast<RecordDecl>(VarD->getDeclContext());
4841 getDeclContextDescriptor(VarD);
4842 // Ensure that the type is retained even though it's otherwise unreferenced.
4843 //
4844 // FIXME: This is probably unnecessary, since Ty should reference RD
4845 // through its scope.
4846 RetainedTypes.push_back(
4847 CGM.getContext().getRecordType(RD).getAsOpaquePtr());
4848
4849 return;
4850 }
4851 llvm::DIScope *DContext = getDeclContextDescriptor(VD);
4852
4853 auto &GV = DeclCache[VD];
4854 if (GV)
4855 return;
4856 llvm::DIExpression *InitExpr = nullptr;
4857 if (CGM.getContext().getTypeSize(VD->getType()) <= 64) {
4858 // FIXME: Add a representation for integer constants wider than 64 bits.
4859 if (Init.isInt())
4860 InitExpr =
4861 DBuilder.createConstantValueExpression(Init.getInt().getExtValue());
4862 else if (Init.isFloat())
4863 InitExpr = DBuilder.createConstantValueExpression(
4864 Init.getFloat().bitcastToAPInt().getZExtValue());
4865 }
4866
4867 llvm::MDTuple *TemplateParameters = nullptr;
4868
4869 if (isa<VarTemplateSpecializationDecl>(VD))
4870 if (VarD) {
4871 llvm::DINodeArray parameterNodes = CollectVarTemplateParams(VarD, &*Unit);
4872 TemplateParameters = parameterNodes.get();
4873 }
4874
4875 GV.reset(DBuilder.createGlobalVariableExpression(
4876 DContext, Name, StringRef(), Unit, getLineNumber(VD->getLocation()), Ty,
4877 true, true, InitExpr, getOrCreateStaticDataMemberDeclarationOrNull(VarD),
4878 TemplateParameters, Align));
4879}
4880
4881void CGDebugInfo::EmitExternalVariable(llvm::GlobalVariable *Var,
4882 const VarDecl *D) {
4883 assert(CGM.getCodeGenOpts().hasReducedDebugInfo())((CGM.getCodeGenOpts().hasReducedDebugInfo()) ? static_cast<
void> (0) : __assert_fail ("CGM.getCodeGenOpts().hasReducedDebugInfo()"
, "/build/llvm-toolchain-snapshot-13~++20210405022414+5f57793c4fe4/clang/lib/CodeGen/CGDebugInfo.cpp"
, 4883, __PRETTY_FUNCTION__))
;
4884 if (D->hasAttr<NoDebugAttr>())
4885 return;
4886
4887 auto Align = getDeclAlignIfRequired(D, CGM.getContext());
4888 llvm::DIFile *Unit = getOrCreateFile(D->getLocation());
4889 StringRef Name = D->getName();
4890 llvm::DIType *Ty = getOrCreateType(D->getType(), Unit);
4891
4892 llvm::DIScope *DContext = getDeclContextDescriptor(D);
4893 llvm::DIGlobalVariableExpression *GVE =
4894 DBuilder.createGlobalVariableExpression(
4895 DContext, Name, StringRef(), Unit, getLineNumber(D->getLocation()),
4896 Ty, false, false, nullptr, nullptr, nullptr, Align);
4897 Var->addDebugInfo(GVE);
4898}
4899
4900llvm::DIScope *CGDebugInfo::getCurrentContextDescriptor(const Decl *D) {
4901 if (!LexicalBlockStack.empty())
4902 return LexicalBlockStack.back();
4903 llvm::DIScope *Mod = getParentModuleOrNull(D);
4904 return getContextDescriptor(D, Mod ? Mod : TheCU);
4905}
4906
4907void CGDebugInfo::EmitUsingDirective(const UsingDirectiveDecl &UD) {
4908 if (!CGM.getCodeGenOpts().hasReducedDebugInfo())
4909 return;
4910 const NamespaceDecl *NSDecl = UD.getNominatedNamespace();
4911 if (!NSDecl->isAnonymousNamespace() ||
4912 CGM.getCodeGenOpts().DebugExplicitImport) {
4913 auto Loc = UD.getLocation();
4914 if (!Loc.isValid())
4915 Loc = CurLoc;
4916 DBuilder.createImportedModule(
4917 getCurrentContextDescriptor(cast<Decl>(UD.getDeclContext())),
4918 getOrCreateNamespace(NSDecl), getOrCreateFile(Loc), getLineNumber(Loc));
4919 }
4920}
4921
4922void CGDebugInfo::EmitUsingDecl(const UsingDecl &UD) {
4923 if (!CGM.getCodeGenOpts().hasReducedDebugInfo())
4924 return;
4925 assert(UD.shadow_size() &&((UD.shadow_size() && "We shouldn't be codegening an invalid UsingDecl containing no decls"
) ? static_cast<void> (0) : __assert_fail ("UD.shadow_size() && \"We shouldn't be codegening an invalid UsingDecl containing no decls\""
, "/build/llvm-toolchain-snapshot-13~++20210405022414+5f57793c4fe4/clang/lib/CodeGen/CGDebugInfo.cpp"
, 4926, __PRETTY_FUNCTION__))
4926 "We shouldn't be codegening an invalid UsingDecl containing no decls")((UD.shadow_size() && "We shouldn't be codegening an invalid UsingDecl containing no decls"
) ? static_cast<void> (0) : __assert_fail ("UD.shadow_size() && \"We shouldn't be codegening an invalid UsingDecl containing no decls\""
, "/build/llvm-toolchain-snapshot-13~++20210405022414+5f57793c4fe4/clang/lib/CodeGen/CGDebugInfo.cpp"
, 4926, __PRETTY_FUNCTION__))
;
4927 // Emitting one decl is sufficient - debuggers can detect that this is an
4928 // overloaded name & provide lookup for all the overloads.
4929 const UsingShadowDecl &USD = **UD.shadow_begin();
4930
4931 // FIXME: Skip functions with undeduced auto return type for now since we
4932 // don't currently have the plumbing for separate declarations & definitions
4933 // of free functions and mismatched types (auto in the declaration, concrete
4934 // return type in the definition)
4935 if (const auto *FD = dyn_cast<FunctionDecl>(USD.getUnderlyingDecl()))
4936 if (const auto *AT =
4937 FD->getType()->castAs<FunctionProtoType>()->getContainedAutoType())
4938 if (AT->getDeducedType().isNull())
4939 return;
4940 if (llvm::DINode *Target =
4941 getDeclarationOrDefinition(USD.getUnderlyingDecl())) {
4942 auto Loc = USD.getLocation();
4943 DBuilder.createImportedDeclaration(
4944 getCurrentContextDescriptor(cast<Decl>(USD.getDeclContext())), Target,
4945 getOrCreateFile(Loc), getLineNumber(Loc));
4946 }
4947}
4948
4949void CGDebugInfo::EmitImportDecl(const ImportDecl &ID) {
4950 if (CGM.getCodeGenOpts().getDebuggerTuning() != llvm::DebuggerKind::LLDB)
4951 return;
4952 if (Module *M = ID.getImportedModule()) {
4953 auto Info = ASTSourceDescriptor(*M);
4954 auto Loc = ID.getLocation();
4955 DBuilder.createImportedDeclaration(
4956 getCurrentContextDescriptor(cast<Decl>(ID.getDeclContext())),
4957 getOrCreateModuleRef(Info, DebugTypeExtRefs), getOrCreateFile(Loc),
4958 getLineNumber(Loc));
4959 }
4960}
4961
4962llvm::DIImportedEntity *
4963CGDebugInfo::EmitNamespaceAlias(const NamespaceAliasDecl &NA) {
4964 if (!CGM.getCodeGenOpts().hasReducedDebugInfo())
4965 return nullptr;
4966 auto &VH = NamespaceAliasCache[&NA];
4967 if (VH)
4968 return cast<llvm::DIImportedEntity>(VH);
4969 llvm::DIImportedEntity *R;
4970 auto Loc = NA.getLocation();
4971 if (const auto *Underlying =
4972 dyn_cast<NamespaceAliasDecl>(NA.getAliasedNamespace()))
4973 // This could cache & dedup here rather than relying on metadata deduping.
4974 R = DBuilder.createImportedDeclaration(
4975 getCurrentContextDescriptor(cast<Decl>(NA.getDeclContext())),
4976 EmitNamespaceAlias(*Underlying), getOrCreateFile(Loc),
4977 getLineNumber(Loc), NA.getName());
4978 else
4979 R = DBuilder.createImportedDeclaration(
4980 getCurrentContextDescriptor(cast<Decl>(NA.getDeclContext())),
4981 getOrCreateNamespace(cast<NamespaceDecl>(NA.getAliasedNamespace())),
4982 getOrCreateFile(Loc), getLineNumber(Loc), NA.getName());
4983 VH.reset(R);
4984 return R;
4985}
4986
4987llvm::DINamespace *
4988CGDebugInfo::getOrCreateNamespace(const NamespaceDecl *NSDecl) {
4989 // Don't canonicalize the NamespaceDecl here: The DINamespace will be uniqued
4990 // if necessary, and this way multiple declarations of the same namespace in
4991 // different parent modules stay distinct.
4992 auto I = NamespaceCache.find(NSDecl);
4993 if (I != NamespaceCache.end())
4994 return cast<llvm::DINamespace>(I->second);
4995
4996 llvm::DIScope *Context = getDeclContextDescriptor(NSDecl);
4997 // Don't trust the context if it is a DIModule (see comment above).
4998 llvm::DINamespace *NS =
4999 DBuilder.createNameSpace(Context, NSDecl->getName(), NSDecl->isInline());
5000 NamespaceCache[NSDecl].reset(NS);
5001 return NS;
5002}
5003
5004void CGDebugInfo::setDwoId(uint64_t Signature) {
5005 assert(TheCU && "no main compile unit")((TheCU && "no main compile unit") ? static_cast<void
> (0) : __assert_fail ("TheCU && \"no main compile unit\""
, "/build/llvm-toolchain-snapshot-13~++20210405022414+5f57793c4fe4/clang/lib/CodeGen/CGDebugInfo.cpp"
, 5005, __PRETTY_FUNCTION__))
;
5006 TheCU->setDWOId(Signature);
5007}
5008
5009void CGDebugInfo::finalize() {
5010 // Creating types might create further types - invalidating the current
5011 // element and the size(), so don't cache/reference them.
5012 for (size_t i = 0; i != ObjCInterfaceCache.size(); ++i) {
5013 ObjCInterfaceCacheEntry E = ObjCInterfaceCache[i];
5014 llvm::DIType *Ty = E.Type->getDecl()->getDefinition()
5015 ? CreateTypeDefinition(E.Type, E.Unit)
5016 : E.Decl;
5017 DBuilder.replaceTemporary(llvm::TempDIType(E.Decl), Ty);
5018 }
5019
5020 // Add methods to interface.
5021 for (const auto &P : ObjCMethodCache) {
5022 if (P.second.empty())
5023 continue;
5024
5025 QualType QTy(P.first->getTypeForDecl(), 0);
5026 auto It = TypeCache.find(QTy.getAsOpaquePtr());
5027 assert(It != TypeCache.end())((It != TypeCache.end()) ? static_cast<void> (0) : __assert_fail
("It != TypeCache.end()", "/build/llvm-toolchain-snapshot-13~++20210405022414+5f57793c4fe4/clang/lib/CodeGen/CGDebugInfo.cpp"
, 5027, __PRETTY_FUNCTION__))
;
5028
5029 llvm::DICompositeType *InterfaceDecl =
5030 cast<llvm::DICompositeType>(It->second);
5031
5032 auto CurElts = InterfaceDecl->getElements();
5033 SmallVector<llvm::Metadata *, 16> EltTys(CurElts.begin(), CurElts.end());
5034
5035 // For DWARF v4 or earlier, only add objc_direct methods.
5036 for (auto &SubprogramDirect : P.second)
5037 if (CGM.getCodeGenOpts().DwarfVersion >= 5 || SubprogramDirect.getInt())
5038 EltTys.push_back(SubprogramDirect.getPointer());
5039
5040 llvm::DINodeArray Elements = DBuilder.getOrCreateArray(EltTys);
5041 DBuilder.replaceArrays(InterfaceDecl, Elements);
5042 }
5043
5044 for (const auto &P : ReplaceMap) {
5045 assert(P.second)((P.second) ? static_cast<void> (0) : __assert_fail ("P.second"
, "/build/llvm-toolchain-snapshot-13~++20210405022414+5f57793c4fe4/clang/lib/CodeGen/CGDebugInfo.cpp"
, 5045, __PRETTY_FUNCTION__))
;
5046 auto *Ty = cast<llvm::DIType>(P.second);
5047 assert(Ty->isForwardDecl())((Ty->isForwardDecl()) ? static_cast<void> (0) : __assert_fail
("Ty->isForwardDecl()", "/build/llvm-toolchain-snapshot-13~++20210405022414+5f57793c4fe4/clang/lib/CodeGen/CGDebugInfo.cpp"
, 5047, __PRETTY_FUNCTION__))
;
5048
5049 auto It = TypeCache.find(P.first);
5050 assert(It != TypeCache.end())((It != TypeCache.end()) ? static_cast<void> (0) : __assert_fail
("It != TypeCache.end()", "/build/llvm-toolchain-snapshot-13~++20210405022414+5f57793c4fe4/clang/lib/CodeGen/CGDebugInfo.cpp"
, 5050, __PRETTY_FUNCTION__))
;
5051 assert(It->second)((It->second) ? static_cast<void> (0) : __assert_fail
("It->second", "/build/llvm-toolchain-snapshot-13~++20210405022414+5f57793c4fe4/clang/lib/CodeGen/CGDebugInfo.cpp"
, 5051, __PRETTY_FUNCTION__))
;
5052
5053 DBuilder.replaceTemporary(llvm::TempDIType(Ty),
5054 cast<llvm::DIType>(It->second));
5055 }
5056
5057 for (const auto &P : FwdDeclReplaceMap) {
5058 assert(P.second)((P.second) ? static_cast<void> (0) : __assert_fail ("P.second"
, "/build/llvm-toolchain-snapshot-13~++20210405022414+5f57793c4fe4/clang/lib/CodeGen/CGDebugInfo.cpp"
, 5058, __PRETTY_FUNCTION__))
;
5059 llvm::TempMDNode FwdDecl(cast<llvm::MDNode>(P.second));
5060 llvm::Metadata *Repl;
5061
5062 auto It = DeclCache.find(P.first);
5063 // If there has been no definition for the declaration, call RAUW
5064 // with ourselves, that will destroy the temporary MDNode and
5065 // replace it with a standard one, avoiding leaking memory.
5066 if (It == DeclCache.end())
5067 Repl = P.second;
5068 else
5069 Repl = It->second;
5070
5071 if (auto *GVE = dyn_cast_or_null<llvm::DIGlobalVariableExpression>(Repl))
5072 Repl = GVE->getVariable();
5073 DBuilder.replaceTemporary(std::move(FwdDecl), cast<llvm::MDNode>(Repl));
5074 }
5075
5076 // We keep our own list of retained types, because we need to look
5077 // up the final type in the type cache.
5078 for (auto &RT : RetainedTypes)
5079 if (auto MD = TypeCache[RT])
5080 DBuilder.retainType(cast<llvm::DIType>(MD));
5081
5082 DBuilder.finalize();
5083}
5084
5085// Don't ignore in case of explicit cast where it is referenced indirectly.
5086void CGDebugInfo::EmitExplicitCastType(QualType Ty) {
5087 if (CGM.getCodeGenOpts().hasReducedDebugInfo())
5088 if (auto *DieTy = getOrCreateType(Ty, TheCU->getFile()))
5089 DBuilder.retainType(DieTy);
5090}
5091
5092void CGDebugInfo::EmitAndRetainType(QualType Ty) {
5093 if (CGM.getCodeGenOpts().hasMaybeUnusedDebugInfo())
1
Taking true branch
5094 if (auto *DieTy = getOrCreateType(Ty, TheCU->getFile()))
2
Calling 'CGDebugInfo::getOrCreateType'
5095 DBuilder.retainType(DieTy);
5096}
5097
5098llvm::DebugLoc CGDebugInfo::SourceLocToDebugLoc(SourceLocation Loc) {
5099 if (LexicalBlockStack.empty())
5100 return llvm::DebugLoc();
5101
5102 llvm::MDNode *Scope = LexicalBlockStack.back();
5103 return llvm::DILocation::get(CGM.getLLVMContext(), getLineNumber(Loc),
5104 getColumnNumber(Loc), Scope);
5105}
5106
5107llvm::DINode::DIFlags CGDebugInfo::getCallSiteRelatedAttrs() const {
5108 // Call site-related attributes are only useful in optimized programs, and
5109 // when there's a possibility of debugging backtraces.
5110 if (!CGM.getLangOpts().Optimize || DebugKind == codegenoptions::NoDebugInfo ||
5111 DebugKind == codegenoptions::LocTrackingOnly)
5112 return llvm::DINode::FlagZero;
5113
5114 // Call site-related attributes are available in DWARF v5. Some debuggers,
5115 // while not fully DWARF v5-compliant, may accept these attributes as if they
5116 // were part of DWARF v4.
5117 bool SupportsDWARFv4Ext =
5118 CGM.getCodeGenOpts().DwarfVersion == 4 &&
5119 (CGM.getCodeGenOpts().getDebuggerTuning() == llvm::DebuggerKind::LLDB ||
5120 CGM.getCodeGenOpts().getDebuggerTuning() == llvm::DebuggerKind::GDB);
5121
5122 if (!SupportsDWARFv4Ext && CGM.getCodeGenOpts().DwarfVersion < 5)
5123 return llvm::DINode::FlagZero;
5124
5125 return llvm::DINode::FlagAllCallsDescribed;
5126}

/build/llvm-toolchain-snapshot-13~++20210405022414+5f57793c4fe4/clang/include/clang/AST/Type.h

1//===- Type.h - C Language Family Type Representation -----------*- C++ -*-===//
2//
3// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4// See https://llvm.org/LICENSE.txt for license information.
5// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6//
7//===----------------------------------------------------------------------===//
8//
9/// \file
10/// C Language Family Type Representation
11///
12/// This file defines the clang::Type interface and subclasses, used to
13/// represent types for languages in the C family.
14//
15//===----------------------------------------------------------------------===//
16
17#ifndef LLVM_CLANG_AST_TYPE_H
18#define LLVM_CLANG_AST_TYPE_H
19
20#include "clang/AST/DependenceFlags.h"
21#include "clang/AST/NestedNameSpecifier.h"
22#include "clang/AST/TemplateName.h"
23#include "clang/Basic/AddressSpaces.h"
24#include "clang/Basic/AttrKinds.h"
25#include "clang/Basic/Diagnostic.h"
26#include "clang/Basic/ExceptionSpecificationType.h"
27#include "clang/Basic/LLVM.h"
28#include "clang/Basic/Linkage.h"
29#include "clang/Basic/PartialDiagnostic.h"
30#include "clang/Basic/SourceLocation.h"
31#include "clang/Basic/Specifiers.h"
32#include "clang/Basic/Visibility.h"
33#include "llvm/ADT/APInt.h"
34#include "llvm/ADT/APSInt.h"
35#include "llvm/ADT/ArrayRef.h"
36#include "llvm/ADT/FoldingSet.h"
37#include "llvm/ADT/None.h"
38#include "llvm/ADT/Optional.h"
39#include "llvm/ADT/PointerIntPair.h"
40#include "llvm/ADT/PointerUnion.h"
41#include "llvm/ADT/StringRef.h"
42#include "llvm/ADT/Twine.h"
43#include "llvm/ADT/iterator_range.h"
44#include "llvm/Support/Casting.h"
45#include "llvm/Support/Compiler.h"
46#include "llvm/Support/ErrorHandling.h"
47#include "llvm/Support/PointerLikeTypeTraits.h"
48#include "llvm/Support/TrailingObjects.h"
49#include "llvm/Support/type_traits.h"
50#include <cassert>
51#include <cstddef>
52#include <cstdint>
53#include <cstring>
54#include <string>
55#include <type_traits>
56#include <utility>
57
58namespace clang {
59
60class ExtQuals;
61class QualType;
62class ConceptDecl;
63class TagDecl;
64class TemplateParameterList;
65class Type;
66
67enum {
68 TypeAlignmentInBits = 4,
69 TypeAlignment = 1 << TypeAlignmentInBits
70};
71
72namespace serialization {
73 template <class T> class AbstractTypeReader;
74 template <class T> class AbstractTypeWriter;
75}
76
77} // namespace clang
78
79namespace llvm {
80
81 template <typename T>
82 struct PointerLikeTypeTraits;
83 template<>
84 struct PointerLikeTypeTraits< ::clang::Type*> {
85 static inline void *getAsVoidPointer(::clang::Type *P) { return P; }
86
87 static inline ::clang::Type *getFromVoidPointer(void *P) {
88 return static_cast< ::clang::Type*>(P);
89 }
90
91 static constexpr int NumLowBitsAvailable = clang::TypeAlignmentInBits;
92 };
93
94 template<>
95 struct PointerLikeTypeTraits< ::clang::ExtQuals*> {
96 static inline void *getAsVoidPointer(::clang::ExtQuals *P) { return P; }
97
98 static inline ::clang::ExtQuals *getFromVoidPointer(void *P) {
99 return static_cast< ::clang::ExtQuals*>(P);
100 }
101
102 static constexpr int NumLowBitsAvailable = clang::TypeAlignmentInBits;
103 };
104
105} // namespace llvm
106
107namespace clang {
108
109class ASTContext;
110template <typename> class CanQual;
111class CXXRecordDecl;
112class DeclContext;
113class EnumDecl;
114class Expr;
115class ExtQualsTypeCommonBase;
116class FunctionDecl;
117class IdentifierInfo;
118class NamedDecl;
119class ObjCInterfaceDecl;
120class ObjCProtocolDecl;
121class ObjCTypeParamDecl;
122struct PrintingPolicy;
123class RecordDecl;
124class Stmt;
125class TagDecl;
126class TemplateArgument;
127class TemplateArgumentListInfo;
128class TemplateArgumentLoc;
129class TemplateTypeParmDecl;
130class TypedefNameDecl;
131class UnresolvedUsingTypenameDecl;
132
133using CanQualType = CanQual<Type>;
134
135// Provide forward declarations for all of the *Type classes.
136#define TYPE(Class, Base) class Class##Type;
137#include "clang/AST/TypeNodes.inc"
138
139/// The collection of all-type qualifiers we support.
140/// Clang supports five independent qualifiers:
141/// * C99: const, volatile, and restrict
142/// * MS: __unaligned
143/// * Embedded C (TR18037): address spaces
144/// * Objective C: the GC attributes (none, weak, or strong)
145class Qualifiers {
146public:
147 enum TQ { // NOTE: These flags must be kept in sync with DeclSpec::TQ.
148 Const = 0x1,
149 Restrict = 0x2,
150 Volatile = 0x4,
151 CVRMask = Const | Volatile | Restrict
152 };
153
154 enum GC {
155 GCNone = 0,
156 Weak,
157 Strong
158 };
159
160 enum ObjCLifetime {
161 /// There is no lifetime qualification on this type.
162 OCL_None,
163
164 /// This object can be modified without requiring retains or
165 /// releases.
166 OCL_ExplicitNone,
167
168 /// Assigning into this object requires the old value to be
169 /// released and the new value to be retained. The timing of the
170 /// release of the old value is inexact: it may be moved to
171 /// immediately after the last known point where the value is
172 /// live.
173 OCL_Strong,
174
175 /// Reading or writing from this object requires a barrier call.
176 OCL_Weak,
177
178 /// Assigning into this object requires a lifetime extension.
179 OCL_Autoreleasing
180 };
181
182 enum {
183 /// The maximum supported address space number.
184 /// 23 bits should be enough for anyone.
185 MaxAddressSpace = 0x7fffffu,
186
187 /// The width of the "fast" qualifier mask.
188 FastWidth = 3,
189
190 /// The fast qualifier mask.
191 FastMask = (1 << FastWidth) - 1
192 };
193
194 /// Returns the common set of qualifiers while removing them from
195 /// the given sets.
196 static Qualifiers removeCommonQualifiers(Qualifiers &L, Qualifiers &R) {
197 // If both are only CVR-qualified, bit operations are sufficient.
198 if (!(L.Mask & ~CVRMask) && !(R.Mask & ~CVRMask)) {
199 Qualifiers Q;
200 Q.Mask = L.Mask & R.Mask;
201 L.Mask &= ~Q.Mask;
202 R.Mask &= ~Q.Mask;
203 return Q;
204 }
205
206 Qualifiers Q;
207 unsigned CommonCRV = L.getCVRQualifiers() & R.getCVRQualifiers();
208 Q.addCVRQualifiers(CommonCRV);
209 L.removeCVRQualifiers(CommonCRV);
210 R.removeCVRQualifiers(CommonCRV);
211
212 if (L.getObjCGCAttr() == R.getObjCGCAttr()) {
213 Q.setObjCGCAttr(L.getObjCGCAttr());
214 L.removeObjCGCAttr();
215 R.removeObjCGCAttr();
216 }
217
218 if (L.getObjCLifetime() == R.getObjCLifetime()) {
219 Q.setObjCLifetime(L.getObjCLifetime());
220 L.removeObjCLifetime();
221 R.removeObjCLifetime();
222 }
223
224 if (L.getAddressSpace() == R.getAddressSpace()) {
225 Q.setAddressSpace(L.getAddressSpace());
226 L.removeAddressSpace();
227 R.removeAddressSpace();
228 }
229 return Q;
230 }
231
232 static Qualifiers fromFastMask(unsigned Mask) {
233 Qualifiers Qs;
234 Qs.addFastQualifiers(Mask);
235 return Qs;
236 }
237
238 static Qualifiers fromCVRMask(unsigned CVR) {
239 Qualifiers Qs;
240 Qs.addCVRQualifiers(CVR);
241 return Qs;
242 }
243
244 static Qualifiers fromCVRUMask(unsigned CVRU) {
245 Qualifiers Qs;
246 Qs.addCVRUQualifiers(CVRU);
247 return Qs;
248 }
249
250 // Deserialize qualifiers from an opaque representation.
251 static Qualifiers fromOpaqueValue(unsigned opaque) {
252 Qualifiers Qs;
253 Qs.Mask = opaque;
254 return Qs;
255 }
256
257 // Serialize these qualifiers into an opaque representation.
258 unsigned getAsOpaqueValue() const {
259 return Mask;
260 }
261
262 bool hasConst() const { return Mask & Const; }
263 bool hasOnlyConst() const { return Mask == Const; }
264 void removeConst() { Mask &= ~Const; }
265 void addConst() { Mask |= Const; }
266
267 bool hasVolatile() const { return Mask & Volatile; }
268 bool hasOnlyVolatile() const { return Mask == Volatile; }
269 void removeVolatile() { Mask &= ~Volatile; }
270 void addVolatile() { Mask |= Volatile; }
271
272 bool hasRestrict() const { return Mask & Restrict; }
273 bool hasOnlyRestrict() const { return Mask == Restrict; }
274 void removeRestrict() { Mask &= ~Restrict; }
275 void addRestrict() { Mask |= Restrict; }
276
277 bool hasCVRQualifiers() const { return getCVRQualifiers(); }
278 unsigned getCVRQualifiers() const { return Mask & CVRMask; }
279 unsigned getCVRUQualifiers() const { return Mask & (CVRMask | UMask); }
280
281 void setCVRQualifiers(unsigned mask) {
282 assert(!(mask & ~CVRMask) && "bitmask contains non-CVR bits")((!(mask & ~CVRMask) && "bitmask contains non-CVR bits"
) ? static_cast<void> (0) : __assert_fail ("!(mask & ~CVRMask) && \"bitmask contains non-CVR bits\""
, "/build/llvm-toolchain-snapshot-13~++20210405022414+5f57793c4fe4/clang/include/clang/AST/Type.h"
, 282, __PRETTY_FUNCTION__))
;
283 Mask = (Mask & ~CVRMask) | mask;
284 }
285 void removeCVRQualifiers(unsigned mask) {
286 assert(!(mask & ~CVRMask) && "bitmask contains non-CVR bits")((!(mask & ~CVRMask) && "bitmask contains non-CVR bits"
) ? static_cast<void> (0) : __assert_fail ("!(mask & ~CVRMask) && \"bitmask contains non-CVR bits\""
, "/build/llvm-toolchain-snapshot-13~++20210405022414+5f57793c4fe4/clang/include/clang/AST/Type.h"
, 286, __PRETTY_FUNCTION__))
;
287 Mask &= ~mask;
288 }
289 void removeCVRQualifiers() {
290 removeCVRQualifiers(CVRMask);
291 }
292 void addCVRQualifiers(unsigned mask) {
293 assert(!(mask & ~CVRMask) && "bitmask contains non-CVR bits")((!(mask & ~CVRMask) && "bitmask contains non-CVR bits"
) ? static_cast<void> (0) : __assert_fail ("!(mask & ~CVRMask) && \"bitmask contains non-CVR bits\""
, "/build/llvm-toolchain-snapshot-13~++20210405022414+5f57793c4fe4/clang/include/clang/AST/Type.h"
, 293, __PRETTY_FUNCTION__))
;
294 Mask |= mask;
295 }
296 void addCVRUQualifiers(unsigned mask) {
297 assert(!(mask & ~CVRMask & ~UMask) && "bitmask contains non-CVRU bits")((!(mask & ~CVRMask & ~UMask) && "bitmask contains non-CVRU bits"
) ? static_cast<void> (0) : __assert_fail ("!(mask & ~CVRMask & ~UMask) && \"bitmask contains non-CVRU bits\""
, "/build/llvm-toolchain-snapshot-13~++20210405022414+5f57793c4fe4/clang/include/clang/AST/Type.h"
, 297, __PRETTY_FUNCTION__))
;
298 Mask |= mask;
299 }
300
301 bool hasUnaligned() const { return Mask & UMask; }
302 void setUnaligned(bool flag) {
303 Mask = (Mask & ~UMask) | (flag ? UMask : 0);
304 }
305 void removeUnaligned() { Mask &= ~UMask; }
306 void addUnaligned() { Mask |= UMask; }
307
308 bool hasObjCGCAttr() const { return Mask & GCAttrMask; }
309 GC getObjCGCAttr() const { return GC((Mask & GCAttrMask) >> GCAttrShift); }
310 void setObjCGCAttr(GC type) {
311 Mask = (Mask & ~GCAttrMask) | (type << GCAttrShift);
312 }
313 void removeObjCGCAttr() { setObjCGCAttr(GCNone); }
314 void addObjCGCAttr(GC type) {
315 assert(type)((type) ? static_cast<void> (0) : __assert_fail ("type"
, "/build/llvm-toolchain-snapshot-13~++20210405022414+5f57793c4fe4/clang/include/clang/AST/Type.h"
, 315, __PRETTY_FUNCTION__))
;
316 setObjCGCAttr(type);
317 }
318 Qualifiers withoutObjCGCAttr() const {
319 Qualifiers qs = *this;
320 qs.removeObjCGCAttr();
321 return qs;
322 }
323 Qualifiers withoutObjCLifetime() const {
324 Qualifiers qs = *this;
325 qs.removeObjCLifetime();
326 return qs;
327 }
328 Qualifiers withoutAddressSpace() const {
329 Qualifiers qs = *this;
330 qs.removeAddressSpace();
331 return qs;
332 }
333
334 bool hasObjCLifetime() const { return Mask & LifetimeMask; }
335 ObjCLifetime getObjCLifetime() const {
336 return ObjCLifetime((Mask & LifetimeMask) >> LifetimeShift);
337 }
338 void setObjCLifetime(ObjCLifetime type) {
339 Mask = (Mask & ~LifetimeMask) | (type << LifetimeShift);
340 }
341 void removeObjCLifetime() { setObjCLifetime(OCL_None); }
342 void addObjCLifetime(ObjCLifetime type) {
343 assert(type)((type) ? static_cast<void> (0) : __assert_fail ("type"
, "/build/llvm-toolchain-snapshot-13~++20210405022414+5f57793c4fe4/clang/include/clang/AST/Type.h"
, 343, __PRETTY_FUNCTION__))
;
344 assert(!hasObjCLifetime())((!hasObjCLifetime()) ? static_cast<void> (0) : __assert_fail
("!hasObjCLifetime()", "/build/llvm-toolchain-snapshot-13~++20210405022414+5f57793c4fe4/clang/include/clang/AST/Type.h"
, 344, __PRETTY_FUNCTION__))
;
345 Mask |= (type << LifetimeShift);
346 }
347
348 /// True if the lifetime is neither None or ExplicitNone.
349 bool hasNonTrivialObjCLifetime() const {
350 ObjCLifetime lifetime = getObjCLifetime();
351 return (lifetime > OCL_ExplicitNone);
352 }
353
354 /// True if the lifetime is either strong or weak.
355 bool hasStrongOrWeakObjCLifetime() const {
356 ObjCLifetime lifetime = getObjCLifetime();
357 return (lifetime == OCL_Strong || lifetime == OCL_Weak);
358 }
359
360 bool hasAddressSpace() const { return Mask & AddressSpaceMask; }
361 LangAS getAddressSpace() const {
362 return static_cast<LangAS>(Mask >> AddressSpaceShift);
363 }
364 bool hasTargetSpecificAddressSpace() const {
365 return isTargetAddressSpace(getAddressSpace());
366 }
367 /// Get the address space attribute value to be printed by diagnostics.
368 unsigned getAddressSpaceAttributePrintValue() const {
369 auto Addr = getAddressSpace();
370 // This function is not supposed to be used with language specific
371 // address spaces. If that happens, the diagnostic message should consider
372 // printing the QualType instead of the address space value.
373 assert(Addr == LangAS::Default || hasTargetSpecificAddressSpace())((Addr == LangAS::Default || hasTargetSpecificAddressSpace())
? static_cast<void> (0) : __assert_fail ("Addr == LangAS::Default || hasTargetSpecificAddressSpace()"
, "/build/llvm-toolchain-snapshot-13~++20210405022414+5f57793c4fe4/clang/include/clang/AST/Type.h"
, 373, __PRETTY_FUNCTION__))
;
374 if (Addr != LangAS::Default)
375 return toTargetAddressSpace(Addr);
376 // TODO: The diagnostic messages where Addr may be 0 should be fixed
377 // since it cannot differentiate the situation where 0 denotes the default
378 // address space or user specified __attribute__((address_space(0))).
379 return 0;
380 }
381 void setAddressSpace(LangAS space) {
382 assert((unsigned)space <= MaxAddressSpace)(((unsigned)space <= MaxAddressSpace) ? static_cast<void
> (0) : __assert_fail ("(unsigned)space <= MaxAddressSpace"
, "/build/llvm-toolchain-snapshot-13~++20210405022414+5f57793c4fe4/clang/include/clang/AST/Type.h"
, 382, __PRETTY_FUNCTION__))
;
383 Mask = (Mask & ~AddressSpaceMask)
384 | (((uint32_t) space) << AddressSpaceShift);
385 }
386 void removeAddressSpace() { setAddressSpace(LangAS::Default); }
387 void addAddressSpace(LangAS space) {
388 assert(space != LangAS::Default)((space != LangAS::Default) ? static_cast<void> (0) : __assert_fail
("space != LangAS::Default", "/build/llvm-toolchain-snapshot-13~++20210405022414+5f57793c4fe4/clang/include/clang/AST/Type.h"
, 388, __PRETTY_FUNCTION__))
;
389 setAddressSpace(space);
390 }
391
392 // Fast qualifiers are those that can be allocated directly
393 // on a QualType object.
394 bool hasFastQualifiers() const { return getFastQualifiers(); }
395 unsigned getFastQualifiers() const { return Mask & FastMask; }
396 void setFastQualifiers(unsigned mask) {
397 assert(!(mask & ~FastMask) && "bitmask contains non-fast qualifier bits")((!(mask & ~FastMask) && "bitmask contains non-fast qualifier bits"
) ? static_cast<void> (0) : __assert_fail ("!(mask & ~FastMask) && \"bitmask contains non-fast qualifier bits\""
, "/build/llvm-toolchain-snapshot-13~++20210405022414+5f57793c4fe4/clang/include/clang/AST/Type.h"
, 397, __PRETTY_FUNCTION__))
;
398 Mask = (Mask & ~FastMask) | mask;
399 }
400 void removeFastQualifiers(unsigned mask) {
401 assert(!(mask & ~FastMask) && "bitmask contains non-fast qualifier bits")((!(mask & ~FastMask) && "bitmask contains non-fast qualifier bits"
) ? static_cast<void> (0) : __assert_fail ("!(mask & ~FastMask) && \"bitmask contains non-fast qualifier bits\""
, "/build/llvm-toolchain-snapshot-13~++20210405022414+5f57793c4fe4/clang/include/clang/AST/Type.h"
, 401, __PRETTY_FUNCTION__))
;
402 Mask &= ~mask;
403 }
404 void removeFastQualifiers() {
405 removeFastQualifiers(FastMask);
406 }
407 void addFastQualifiers(unsigned mask) {
408 assert(!(mask & ~FastMask) && "bitmask contains non-fast qualifier bits")((!(mask & ~FastMask) && "bitmask contains non-fast qualifier bits"
) ? static_cast<void> (0) : __assert_fail ("!(mask & ~FastMask) && \"bitmask contains non-fast qualifier bits\""
, "/build/llvm-toolchain-snapshot-13~++20210405022414+5f57793c4fe4/clang/include/clang/AST/Type.h"
, 408, __PRETTY_FUNCTION__))
;
409 Mask |= mask;
410 }
411
412 /// Return true if the set contains any qualifiers which require an ExtQuals
413 /// node to be allocated.
414 bool hasNonFastQualifiers() const { return Mask & ~FastMask; }
415 Qualifiers getNonFastQualifiers() const {
416 Qualifiers Quals = *this;
417 Quals.setFastQualifiers(0);
418 return Quals;
419 }
420
421 /// Return true if the set contains any qualifiers.
422 bool hasQualifiers() const { return Mask; }
423 bool empty() const { return !Mask; }
424
425 /// Add the qualifiers from the given set to this set.
426 void addQualifiers(Qualifiers Q) {
427 // If the other set doesn't have any non-boolean qualifiers, just
428 // bit-or it in.
429 if (!(Q.Mask & ~CVRMask))
430 Mask |= Q.Mask;
431 else {
432 Mask |= (Q.Mask & CVRMask);
433 if (Q.hasAddressSpace())
434 addAddressSpace(Q.getAddressSpace());
435 if (Q.hasObjCGCAttr())
436 addObjCGCAttr(Q.getObjCGCAttr());
437 if (Q.hasObjCLifetime())
438 addObjCLifetime(Q.getObjCLifetime());
439 }
440 }
441
442 /// Remove the qualifiers from the given set from this set.
443 void removeQualifiers(Qualifiers Q) {
444 // If the other set doesn't have any non-boolean qualifiers, just
445 // bit-and the inverse in.
446 if (!(Q.Mask & ~CVRMask))
447 Mask &= ~Q.Mask;
448 else {
449 Mask &= ~(Q.Mask & CVRMask);
450 if (getObjCGCAttr() == Q.getObjCGCAttr())
451 removeObjCGCAttr();
452 if (getObjCLifetime() == Q.getObjCLifetime())
453 removeObjCLifetime();
454 if (getAddressSpace() == Q.getAddressSpace())
455 removeAddressSpace();
456 }
457 }
458
459 /// Add the qualifiers from the given set to this set, given that
460 /// they don't conflict.
461 void addConsistentQualifiers(Qualifiers qs) {
462 assert(getAddressSpace() == qs.getAddressSpace() ||((getAddressSpace() == qs.getAddressSpace() || !hasAddressSpace
() || !qs.hasAddressSpace()) ? static_cast<void> (0) : __assert_fail
("getAddressSpace() == qs.getAddressSpace() || !hasAddressSpace() || !qs.hasAddressSpace()"
, "/build/llvm-toolchain-snapshot-13~++20210405022414+5f57793c4fe4/clang/include/clang/AST/Type.h"
, 463, __PRETTY_FUNCTION__))
463 !hasAddressSpace() || !qs.hasAddressSpace())((getAddressSpace() == qs.getAddressSpace() || !hasAddressSpace
() || !qs.hasAddressSpace()) ? static_cast<void> (0) : __assert_fail
("getAddressSpace() == qs.getAddressSpace() || !hasAddressSpace() || !qs.hasAddressSpace()"
, "/build/llvm-toolchain-snapshot-13~++20210405022414+5f57793c4fe4/clang/include/clang/AST/Type.h"
, 463, __PRETTY_FUNCTION__))
;
464 assert(getObjCGCAttr() == qs.getObjCGCAttr() ||((getObjCGCAttr() == qs.getObjCGCAttr() || !hasObjCGCAttr() ||
!qs.hasObjCGCAttr()) ? static_cast<void> (0) : __assert_fail
("getObjCGCAttr() == qs.getObjCGCAttr() || !hasObjCGCAttr() || !qs.hasObjCGCAttr()"
, "/build/llvm-toolchain-snapshot-13~++20210405022414+5f57793c4fe4/clang/include/clang/AST/Type.h"
, 465, __PRETTY_FUNCTION__))
465 !hasObjCGCAttr() || !qs.hasObjCGCAttr())((getObjCGCAttr() == qs.getObjCGCAttr() || !hasObjCGCAttr() ||
!qs.hasObjCGCAttr()) ? static_cast<void> (0) : __assert_fail
("getObjCGCAttr() == qs.getObjCGCAttr() || !hasObjCGCAttr() || !qs.hasObjCGCAttr()"
, "/build/llvm-toolchain-snapshot-13~++20210405022414+5f57793c4fe4/clang/include/clang/AST/Type.h"
, 465, __PRETTY_FUNCTION__))
;
466 assert(getObjCLifetime() == qs.getObjCLifetime() ||((getObjCLifetime() == qs.getObjCLifetime() || !hasObjCLifetime
() || !qs.hasObjCLifetime()) ? static_cast<void> (0) : __assert_fail
("getObjCLifetime() == qs.getObjCLifetime() || !hasObjCLifetime() || !qs.hasObjCLifetime()"
, "/build/llvm-toolchain-snapshot-13~++20210405022414+5f57793c4fe4/clang/include/clang/AST/Type.h"
, 467, __PRETTY_FUNCTION__))
467 !hasObjCLifetime() || !qs.hasObjCLifetime())((getObjCLifetime() == qs.getObjCLifetime() || !hasObjCLifetime
() || !qs.hasObjCLifetime()) ? static_cast<void> (0) : __assert_fail
("getObjCLifetime() == qs.getObjCLifetime() || !hasObjCLifetime() || !qs.hasObjCLifetime()"
, "/build/llvm-toolchain-snapshot-13~++20210405022414+5f57793c4fe4/clang/include/clang/AST/Type.h"
, 467, __PRETTY_FUNCTION__))
;
468 Mask |= qs.Mask;
469 }
470
471 /// Returns true if address space A is equal to or a superset of B.
472 /// OpenCL v2.0 defines conversion rules (OpenCLC v2.0 s6.5.5) and notion of
473 /// overlapping address spaces.
474 /// CL1.1 or CL1.2:
475 /// every address space is a superset of itself.
476 /// CL2.0 adds:
477 /// __generic is a superset of any address space except for __constant.
478 static bool isAddressSpaceSupersetOf(LangAS A, LangAS B) {
479 // Address spaces must match exactly.
480 return A == B ||
481 // Otherwise in OpenCLC v2.0 s6.5.5: every address space except
482 // for __constant can be used as __generic.
483 (A == LangAS::opencl_generic && B != LangAS::opencl_constant) ||
484 // We also define global_device and global_host address spaces,
485 // to distinguish global pointers allocated on host from pointers
486 // allocated on device, which are a subset of __global.
487 (A == LangAS::opencl_global && (B == LangAS::opencl_global_device ||
488 B == LangAS::opencl_global_host)) ||
489 // Consider pointer size address spaces to be equivalent to default.
490 ((isPtrSizeAddressSpace(A) || A == LangAS::Default) &&
491 (isPtrSizeAddressSpace(B) || B == LangAS::Default));
492 }
493
494 /// Returns true if the address space in these qualifiers is equal to or
495 /// a superset of the address space in the argument qualifiers.
496 bool isAddressSpaceSupersetOf(Qualifiers other) const {
497 return isAddressSpaceSupersetOf(getAddressSpace(), other.getAddressSpace());
498 }
499
500 /// Determines if these qualifiers compatibly include another set.
501 /// Generally this answers the question of whether an object with the other
502 /// qualifiers can be safely used as an object with these qualifiers.
503 bool compatiblyIncludes(Qualifiers other) const {
504 return isAddressSpaceSupersetOf(other) &&
505 // ObjC GC qualifiers can match, be added, or be removed, but can't
506 // be changed.
507 (getObjCGCAttr() == other.getObjCGCAttr() || !hasObjCGCAttr() ||
508 !other.hasObjCGCAttr()) &&
509 // ObjC lifetime qualifiers must match exactly.
510 getObjCLifetime() == other.getObjCLifetime() &&
511 // CVR qualifiers may subset.
512 (((Mask & CVRMask) | (other.Mask & CVRMask)) == (Mask & CVRMask)) &&
513 // U qualifier may superset.
514 (!other.hasUnaligned() || hasUnaligned());
515 }
516
517 /// Determines if these qualifiers compatibly include another set of
518 /// qualifiers from the narrow perspective of Objective-C ARC lifetime.
519 ///
520 /// One set of Objective-C lifetime qualifiers compatibly includes the other
521 /// if the lifetime qualifiers match, or if both are non-__weak and the
522 /// including set also contains the 'const' qualifier, or both are non-__weak
523 /// and one is None (which can only happen in non-ARC modes).
524 bool compatiblyIncludesObjCLifetime(Qualifiers other) const {
525 if (getObjCLifetime() == other.getObjCLifetime())
526 return true;
527
528 if (getObjCLifetime() == OCL_Weak || other.getObjCLifetime() == OCL_Weak)
529 return false;
530
531 if (getObjCLifetime() == OCL_None || other.getObjCLifetime() == OCL_None)
532 return true;
533
534 return hasConst();
535 }
536
537 /// Determine whether this set of qualifiers is a strict superset of
538 /// another set of qualifiers, not considering qualifier compatibility.
539 bool isStrictSupersetOf(Qualifiers Other) const;
540
541 bool operator==(Qualifiers Other) const { return Mask == Other.Mask; }
542 bool operator!=(Qualifiers Other) const { return Mask != Other.Mask; }
543
544 explicit operator bool() const { return hasQualifiers(); }
545
546 Qualifiers &operator+=(Qualifiers R) {
547 addQualifiers(R);
548 return *this;
549 }
550
551 // Union two qualifier sets. If an enumerated qualifier appears
552 // in both sets, use the one from the right.
553 friend Qualifiers operator+(Qualifiers L, Qualifiers R) {
554 L += R;
555 return L;
556 }
557
558 Qualifiers &operator-=(Qualifiers R) {
559 removeQualifiers(R);
560 return *this;
561 }
562
563 /// Compute the difference between two qualifier sets.
564 friend Qualifiers operator-(Qualifiers L, Qualifiers R) {
565 L -= R;
566 return L;
567 }
568
569 std::string getAsString() const;
570 std::string getAsString(const PrintingPolicy &Policy) const;
571
572 static std::string getAddrSpaceAsString(LangAS AS);
573
574 bool isEmptyWhenPrinted(const PrintingPolicy &Policy) const;
575 void print(raw_ostream &OS, const PrintingPolicy &Policy,
576 bool appendSpaceIfNonEmpty = false) const;
577
578 void Profile(llvm::FoldingSetNodeID &ID) const {
579 ID.AddInteger(Mask);
580 }
581
582private:
583 // bits: |0 1 2|3|4 .. 5|6 .. 8|9 ... 31|
584 // |C R V|U|GCAttr|Lifetime|AddressSpace|
585 uint32_t Mask = 0;
586
587 static const uint32_t UMask = 0x8;
588 static const uint32_t UShift = 3;
589 static const uint32_t GCAttrMask = 0x30;
590 static const uint32_t GCAttrShift = 4;
591 static const uint32_t LifetimeMask = 0x1C0;
592 static const uint32_t LifetimeShift = 6;
593 static const uint32_t AddressSpaceMask =
594 ~(CVRMask | UMask | GCAttrMask | LifetimeMask);
595 static const uint32_t AddressSpaceShift = 9;
596};
597
598/// A std::pair-like structure for storing a qualified type split
599/// into its local qualifiers and its locally-unqualified type.
600struct SplitQualType {
601 /// The locally-unqualified type.
602 const Type *Ty = nullptr;
603
604 /// The local qualifiers.
605 Qualifiers Quals;
606
607 SplitQualType() = default;
608 SplitQualType(const Type *ty, Qualifiers qs) : Ty(ty), Quals(qs) {}
609
610 SplitQualType getSingleStepDesugaredType() const; // end of this file
611
612 // Make std::tie work.
613 std::pair<const Type *,Qualifiers> asPair() const {
614 return std::pair<const Type *, Qualifiers>(Ty, Quals);
615 }
616
617 friend bool operator==(SplitQualType a, SplitQualType b) {
618 return a.Ty == b.Ty && a.Quals == b.Quals;
619 }
620 friend bool operator!=(SplitQualType a, SplitQualType b) {
621 return a.Ty != b.Ty || a.Quals != b.Quals;
622 }
623};
624
625/// The kind of type we are substituting Objective-C type arguments into.
626///
627/// The kind of substitution affects the replacement of type parameters when
628/// no concrete type information is provided, e.g., when dealing with an
629/// unspecialized type.
630enum class ObjCSubstitutionContext {
631 /// An ordinary type.
632 Ordinary,
633
634 /// The result type of a method or function.
635 Result,
636
637 /// The parameter type of a method or function.
638 Parameter,
639
640 /// The type of a property.
641 Property,
642
643 /// The superclass of a type.
644 Superclass,
645};
646
647/// A (possibly-)qualified type.
648///
649/// For efficiency, we don't store CV-qualified types as nodes on their
650/// own: instead each reference to a type stores the qualifiers. This
651/// greatly reduces the number of nodes we need to allocate for types (for
652/// example we only need one for 'int', 'const int', 'volatile int',
653/// 'const volatile int', etc).
654///
655/// As an added efficiency bonus, instead of making this a pair, we
656/// just store the two bits we care about in the low bits of the
657/// pointer. To handle the packing/unpacking, we make QualType be a
658/// simple wrapper class that acts like a smart pointer. A third bit
659/// indicates whether there are extended qualifiers present, in which
660/// case the pointer points to a special structure.
661class QualType {
662 friend class QualifierCollector;
663
664 // Thankfully, these are efficiently composable.
665 llvm::PointerIntPair<llvm::PointerUnion<const Type *, const ExtQuals *>,
666 Qualifiers::FastWidth> Value;
667
668 const ExtQuals *getExtQualsUnsafe() const {
669 return Value.getPointer().get<const ExtQuals*>();
670 }
671
672 const Type *getTypePtrUnsafe() const {
673 return Value.getPointer().get<const Type*>();
674 }
675
676 const ExtQualsTypeCommonBase *getCommonPtr() const {
677 assert(!isNull() && "Cannot retrieve a NULL type pointer")((!isNull() && "Cannot retrieve a NULL type pointer")
? static_cast<void> (0) : __assert_fail ("!isNull() && \"Cannot retrieve a NULL type pointer\""
, "/build/llvm-toolchain-snapshot-13~++20210405022414+5f57793c4fe4/clang/include/clang/AST/Type.h"
, 677, __PRETTY_FUNCTION__))
;
678 auto CommonPtrVal = reinterpret_cast<uintptr_t>(Value.getOpaqueValue());
679 CommonPtrVal &= ~(uintptr_t)((1 << TypeAlignmentInBits) - 1);
680 return reinterpret_cast<ExtQualsTypeCommonBase*>(CommonPtrVal);
681 }
682
683public:
684 QualType() = default;
685 QualType(const Type *Ptr, unsigned Quals) : Value(Ptr, Quals) {}
686 QualType(const ExtQuals *Ptr, unsigned Quals) : Value(Ptr, Quals) {}
687
688 unsigned getLocalFastQualifiers() const { return Value.getInt(); }
689 void setLocalFastQualifiers(unsigned Quals) { Value.setInt(Quals); }
690
691 /// Retrieves a pointer to the underlying (unqualified) type.
692 ///
693 /// This function requires that the type not be NULL. If the type might be
694 /// NULL, use the (slightly less efficient) \c getTypePtrOrNull().
695 const Type *getTypePtr() const;
696
697 const Type *getTypePtrOrNull() const;
698
699 /// Retrieves a pointer to the name of the base type.
700 const IdentifierInfo *getBaseTypeIdentifier() const;
701
702 /// Divides a QualType into its unqualified type and a set of local
703 /// qualifiers.
704 SplitQualType split() const;
705
706 void *getAsOpaquePtr() const { return Value.getOpaqueValue(); }
707
708 static QualType getFromOpaquePtr(const void *Ptr) {
709 QualType T;
710 T.Value.setFromOpaqueValue(const_cast<void*>(Ptr));
711 return T;
712 }
713
714 const Type &operator*() const {
715 return *getTypePtr();
716 }
717
718 const Type *operator->() const {
719 return getTypePtr();
720 }
721
722 bool isCanonical() const;
723 bool isCanonicalAsParam() const;
724
725 /// Return true if this QualType doesn't point to a type yet.
726 bool isNull() const {
727 return Value.getPointer().isNull();
728 }
729
730 /// Determine whether this particular QualType instance has the
731 /// "const" qualifier set, without looking through typedefs that may have
732 /// added "const" at a different level.
733 bool isLocalConstQualified() const {
734 return (getLocalFastQualifiers() & Qualifiers::Const);
735 }
736
737 /// Determine whether this type is const-qualified.
738 bool isConstQualified() const;
739
740 /// Determine whether this particular QualType instance has the
741 /// "restrict" qualifier set, without looking through typedefs that may have
742 /// added "restrict" at a different level.
743 bool isLocalRestrictQualified() const {
744 return (getLocalFastQualifiers() & Qualifiers::Restrict);
745 }
746
747 /// Determine whether this type is restrict-qualified.
748 bool isRestrictQualified() const;
749
750 /// Determine whether this particular QualType instance has the
751 /// "volatile" qualifier set, without looking through typedefs that may have
752 /// added "volatile" at a different level.
753 bool isLocalVolatileQualified() const {
754 return (getLocalFastQualifiers() & Qualifiers::Volatile);
755 }
756
757 /// Determine whether this type is volatile-qualified.
758 bool isVolatileQualified() const;
759
760 /// Determine whether this particular QualType instance has any
761 /// qualifiers, without looking through any typedefs that might add
762 /// qualifiers at a different level.
763 bool hasLocalQualifiers() const {
764 return getLocalFastQualifiers() || hasLocalNonFastQualifiers();
765 }
766
767 /// Determine whether this type has any qualifiers.
768 bool hasQualifiers() const;
769
770 /// Determine whether this particular QualType instance has any
771 /// "non-fast" qualifiers, e.g., those that are stored in an ExtQualType
772 /// instance.
773 bool hasLocalNonFastQualifiers() const {
774 return Value.getPointer().is<const ExtQuals*>();
775 }
776
777 /// Retrieve the set of qualifiers local to this particular QualType
778 /// instance, not including any qualifiers acquired through typedefs or
779 /// other sugar.
780 Qualifiers getLocalQualifiers() const;
781
782 /// Retrieve the set of qualifiers applied to this type.
783 Qualifiers getQualifiers() const;
784
785 /// Retrieve the set of CVR (const-volatile-restrict) qualifiers
786 /// local to this particular QualType instance, not including any qualifiers
787 /// acquired through typedefs or other sugar.
788 unsigned getLocalCVRQualifiers() const {
789 return getLocalFastQualifiers();
790 }
791
792 /// Retrieve the set of CVR (const-volatile-restrict) qualifiers
793 /// applied to this type.
794 unsigned getCVRQualifiers() const;
795
796 bool isConstant(const ASTContext& Ctx) const {
797 return QualType::isConstant(*this, Ctx);
798 }
799
800 /// Determine whether this is a Plain Old Data (POD) type (C++ 3.9p10).
801 bool isPODType(const ASTContext &Context) const;
802
803 /// Return true if this is a POD type according to the rules of the C++98
804 /// standard, regardless of the current compilation's language.
805 bool isCXX98PODType(const ASTContext &Context) const;
806
807 /// Return true if this is a POD type according to the more relaxed rules
808 /// of the C++11 standard, regardless of the current compilation's language.
809 /// (C++0x [basic.types]p9). Note that, unlike
810 /// CXXRecordDecl::isCXX11StandardLayout, this takes DRs into account.
811 bool isCXX11PODType(const ASTContext &Context) const;
812
813 /// Return true if this is a trivial type per (C++0x [basic.types]p9)
814 bool isTrivialType(const ASTContext &Context) const;
815
816 /// Return true if this is a trivially copyable type (C++0x [basic.types]p9)
817 bool isTriviallyCopyableType(const ASTContext &Context) const;
818
819
820 /// Returns true if it is a class and it might be dynamic.
821 bool mayBeDynamicClass() const;
822
823 /// Returns true if it is not a class or if the class might not be dynamic.
824 bool mayBeNotDynamicClass() const;
825
826 // Don't promise in the API that anything besides 'const' can be
827 // easily added.
828
829 /// Add the `const` type qualifier to this QualType.
830 void addConst() {
831 addFastQualifiers(Qualifiers::Const);
832 }
833 QualType withConst() const {
834 return withFastQualifiers(Qualifiers::Const);
835 }
836
837 /// Add the `volatile` type qualifier to this QualType.
838 void addVolatile() {
839 addFastQualifiers(Qualifiers::Volatile);
840 }
841 QualType withVolatile() const {
842 return withFastQualifiers(Qualifiers::Volatile);
843 }
844
845 /// Add the `restrict` qualifier to this QualType.
846 void addRestrict() {
847 addFastQualifiers(Qualifiers::Restrict);
848 }
849 QualType withRestrict() const {
850 return withFastQualifiers(Qualifiers::Restrict);
851 }
852
853 QualType withCVRQualifiers(unsigned CVR) const {
854 return withFastQualifiers(CVR);
855 }
856
857 void addFastQualifiers(unsigned TQs) {
858 assert(!(TQs & ~Qualifiers::FastMask)((!(TQs & ~Qualifiers::FastMask) && "non-fast qualifier bits set in mask!"
) ? static_cast<void> (0) : __assert_fail ("!(TQs & ~Qualifiers::FastMask) && \"non-fast qualifier bits set in mask!\""
, "/build/llvm-toolchain-snapshot-13~++20210405022414+5f57793c4fe4/clang/include/clang/AST/Type.h"
, 859, __PRETTY_FUNCTION__))
859 && "non-fast qualifier bits set in mask!")((!(TQs & ~Qualifiers::FastMask) && "non-fast qualifier bits set in mask!"
) ? static_cast<void> (0) : __assert_fail ("!(TQs & ~Qualifiers::FastMask) && \"non-fast qualifier bits set in mask!\""
, "/build/llvm-toolchain-snapshot-13~++20210405022414+5f57793c4fe4/clang/include/clang/AST/Type.h"
, 859, __PRETTY_FUNCTION__))
;