File: | tools/clang/lib/CodeGen/CGDebugInfo.cpp |
Warning: | line 3337, column 20 Called C++ object pointer is null |
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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/Analysis/Analyses/ExprMutationAnalyzer.h" | |||
22 | #include "clang/AST/ASTContext.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 | using namespace clang; | |||
50 | using namespace clang::CodeGen; | |||
51 | ||||
52 | static uint32_t getTypeAlignIfRequired(const Type *Ty, const ASTContext &Ctx) { | |||
53 | auto TI = Ctx.getTypeInfo(Ty); | |||
54 | return TI.AlignIsRequired ? TI.Align : 0; | |||
55 | } | |||
56 | ||||
57 | static uint32_t getTypeAlignIfRequired(QualType Ty, const ASTContext &Ctx) { | |||
58 | return getTypeAlignIfRequired(Ty.getTypePtr(), Ctx); | |||
59 | } | |||
60 | ||||
61 | static uint32_t getDeclAlignIfRequired(const Decl *D, const ASTContext &Ctx) { | |||
62 | return D->hasAttr<AlignedAttr>() ? D->getMaxAlignment() : 0; | |||
63 | } | |||
64 | ||||
65 | CGDebugInfo::CGDebugInfo(CodeGenModule &CGM) | |||
66 | : CGM(CGM), DebugKind(CGM.getCodeGenOpts().getDebugInfo()), | |||
67 | DebugTypeExtRefs(CGM.getCodeGenOpts().DebugTypeExtRefs), | |||
68 | DBuilder(CGM.getModule()) { | |||
69 | for (const auto &KV : CGM.getCodeGenOpts().DebugPrefixMap) | |||
70 | DebugPrefixMap[KV.first] = KV.second; | |||
71 | CreateCompileUnit(); | |||
72 | } | |||
73 | ||||
74 | CGDebugInfo::~CGDebugInfo() { | |||
75 | 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-10~svn374877/tools/clang/lib/CodeGen/CGDebugInfo.cpp" , 76, __PRETTY_FUNCTION__)) | |||
76 | "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-10~svn374877/tools/clang/lib/CodeGen/CGDebugInfo.cpp" , 76, __PRETTY_FUNCTION__)); | |||
77 | } | |||
78 | ||||
79 | ApplyDebugLocation::ApplyDebugLocation(CodeGenFunction &CGF, | |||
80 | SourceLocation TemporaryLocation) | |||
81 | : CGF(&CGF) { | |||
82 | init(TemporaryLocation); | |||
83 | } | |||
84 | ||||
85 | ApplyDebugLocation::ApplyDebugLocation(CodeGenFunction &CGF, | |||
86 | bool DefaultToEmpty, | |||
87 | SourceLocation TemporaryLocation) | |||
88 | : CGF(&CGF) { | |||
89 | init(TemporaryLocation, DefaultToEmpty); | |||
90 | } | |||
91 | ||||
92 | void ApplyDebugLocation::init(SourceLocation TemporaryLocation, | |||
93 | bool DefaultToEmpty) { | |||
94 | auto *DI = CGF->getDebugInfo(); | |||
95 | if (!DI) { | |||
96 | CGF = nullptr; | |||
97 | return; | |||
98 | } | |||
99 | ||||
100 | OriginalLocation = CGF->Builder.getCurrentDebugLocation(); | |||
101 | ||||
102 | if (OriginalLocation && !DI->CGM.getExpressionLocationsEnabled()) | |||
103 | return; | |||
104 | ||||
105 | if (TemporaryLocation.isValid()) { | |||
106 | DI->EmitLocation(CGF->Builder, TemporaryLocation); | |||
107 | return; | |||
108 | } | |||
109 | ||||
110 | if (DefaultToEmpty) { | |||
111 | CGF->Builder.SetCurrentDebugLocation(llvm::DebugLoc()); | |||
112 | return; | |||
113 | } | |||
114 | ||||
115 | // Construct a location that has a valid scope, but no line info. | |||
116 | assert(!DI->LexicalBlockStack.empty())((!DI->LexicalBlockStack.empty()) ? static_cast<void> (0) : __assert_fail ("!DI->LexicalBlockStack.empty()", "/build/llvm-toolchain-snapshot-10~svn374877/tools/clang/lib/CodeGen/CGDebugInfo.cpp" , 116, __PRETTY_FUNCTION__)); | |||
117 | CGF->Builder.SetCurrentDebugLocation(llvm::DebugLoc::get( | |||
118 | 0, 0, DI->LexicalBlockStack.back(), DI->getInlinedAt())); | |||
119 | } | |||
120 | ||||
121 | ApplyDebugLocation::ApplyDebugLocation(CodeGenFunction &CGF, const Expr *E) | |||
122 | : CGF(&CGF) { | |||
123 | init(E->getExprLoc()); | |||
124 | } | |||
125 | ||||
126 | ApplyDebugLocation::ApplyDebugLocation(CodeGenFunction &CGF, llvm::DebugLoc Loc) | |||
127 | : CGF(&CGF) { | |||
128 | if (!CGF.getDebugInfo()) { | |||
129 | this->CGF = nullptr; | |||
130 | return; | |||
131 | } | |||
132 | OriginalLocation = CGF.Builder.getCurrentDebugLocation(); | |||
133 | if (Loc) | |||
134 | CGF.Builder.SetCurrentDebugLocation(std::move(Loc)); | |||
135 | } | |||
136 | ||||
137 | ApplyDebugLocation::~ApplyDebugLocation() { | |||
138 | // Query CGF so the location isn't overwritten when location updates are | |||
139 | // temporarily disabled (for C++ default function arguments) | |||
140 | if (CGF) | |||
141 | CGF->Builder.SetCurrentDebugLocation(std::move(OriginalLocation)); | |||
142 | } | |||
143 | ||||
144 | ApplyInlineDebugLocation::ApplyInlineDebugLocation(CodeGenFunction &CGF, | |||
145 | GlobalDecl InlinedFn) | |||
146 | : CGF(&CGF) { | |||
147 | if (!CGF.getDebugInfo()) { | |||
148 | this->CGF = nullptr; | |||
149 | return; | |||
150 | } | |||
151 | auto &DI = *CGF.getDebugInfo(); | |||
152 | SavedLocation = DI.getLocation(); | |||
153 | 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-10~svn374877/tools/clang/lib/CodeGen/CGDebugInfo.cpp" , 155, __PRETTY_FUNCTION__)) | |||
154 | 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-10~svn374877/tools/clang/lib/CodeGen/CGDebugInfo.cpp" , 155, __PRETTY_FUNCTION__)) | |||
155 | "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-10~svn374877/tools/clang/lib/CodeGen/CGDebugInfo.cpp" , 155, __PRETTY_FUNCTION__)); | |||
156 | ||||
157 | DI.EmitInlineFunctionStart(CGF.Builder, InlinedFn); | |||
158 | } | |||
159 | ||||
160 | ApplyInlineDebugLocation::~ApplyInlineDebugLocation() { | |||
161 | if (!CGF) | |||
162 | return; | |||
163 | auto &DI = *CGF->getDebugInfo(); | |||
164 | DI.EmitInlineFunctionEnd(CGF->Builder); | |||
165 | DI.EmitLocation(CGF->Builder, SavedLocation); | |||
166 | } | |||
167 | ||||
168 | void CGDebugInfo::setLocation(SourceLocation Loc) { | |||
169 | // If the new location isn't valid return. | |||
170 | if (Loc.isInvalid()) | |||
171 | return; | |||
172 | ||||
173 | CurLoc = CGM.getContext().getSourceManager().getExpansionLoc(Loc); | |||
174 | ||||
175 | // If we've changed files in the middle of a lexical scope go ahead | |||
176 | // and create a new lexical scope with file node if it's different | |||
177 | // from the one in the scope. | |||
178 | if (LexicalBlockStack.empty()) | |||
179 | return; | |||
180 | ||||
181 | SourceManager &SM = CGM.getContext().getSourceManager(); | |||
182 | auto *Scope = cast<llvm::DIScope>(LexicalBlockStack.back()); | |||
183 | PresumedLoc PCLoc = SM.getPresumedLoc(CurLoc); | |||
184 | if (PCLoc.isInvalid() || Scope->getFile() == getOrCreateFile(CurLoc)) | |||
185 | return; | |||
186 | ||||
187 | if (auto *LBF = dyn_cast<llvm::DILexicalBlockFile>(Scope)) { | |||
188 | LexicalBlockStack.pop_back(); | |||
189 | LexicalBlockStack.emplace_back(DBuilder.createLexicalBlockFile( | |||
190 | LBF->getScope(), getOrCreateFile(CurLoc))); | |||
191 | } else if (isa<llvm::DILexicalBlock>(Scope) || | |||
192 | isa<llvm::DISubprogram>(Scope)) { | |||
193 | LexicalBlockStack.pop_back(); | |||
194 | LexicalBlockStack.emplace_back( | |||
195 | DBuilder.createLexicalBlockFile(Scope, getOrCreateFile(CurLoc))); | |||
196 | } | |||
197 | } | |||
198 | ||||
199 | llvm::DIScope *CGDebugInfo::getDeclContextDescriptor(const Decl *D) { | |||
200 | llvm::DIScope *Mod = getParentModuleOrNull(D); | |||
201 | return getContextDescriptor(cast<Decl>(D->getDeclContext()), | |||
202 | Mod ? Mod : TheCU); | |||
203 | } | |||
204 | ||||
205 | llvm::DIScope *CGDebugInfo::getContextDescriptor(const Decl *Context, | |||
206 | llvm::DIScope *Default) { | |||
207 | if (!Context) | |||
208 | return Default; | |||
209 | ||||
210 | auto I = RegionMap.find(Context); | |||
211 | if (I != RegionMap.end()) { | |||
212 | llvm::Metadata *V = I->second; | |||
213 | return dyn_cast_or_null<llvm::DIScope>(V); | |||
214 | } | |||
215 | ||||
216 | // Check namespace. | |||
217 | if (const auto *NSDecl = dyn_cast<NamespaceDecl>(Context)) | |||
218 | return getOrCreateNamespace(NSDecl); | |||
219 | ||||
220 | if (const auto *RDecl = dyn_cast<RecordDecl>(Context)) | |||
221 | if (!RDecl->isDependentType()) | |||
222 | return getOrCreateType(CGM.getContext().getTypeDeclType(RDecl), | |||
223 | TheCU->getFile()); | |||
224 | return Default; | |||
225 | } | |||
226 | ||||
227 | PrintingPolicy CGDebugInfo::getPrintingPolicy() const { | |||
228 | PrintingPolicy PP = CGM.getContext().getPrintingPolicy(); | |||
229 | ||||
230 | // If we're emitting codeview, it's important to try to match MSVC's naming so | |||
231 | // that visualizers written for MSVC will trigger for our class names. In | |||
232 | // particular, we can't have spaces between arguments of standard templates | |||
233 | // like basic_string and vector. | |||
234 | if (CGM.getCodeGenOpts().EmitCodeView) | |||
235 | PP.MSVCFormatting = true; | |||
236 | ||||
237 | // Apply -fdebug-prefix-map. | |||
238 | PP.RemapFilePaths = true; | |||
239 | PP.remapPath = [this](StringRef Path) { return remapDIPath(Path); }; | |||
240 | return PP; | |||
241 | } | |||
242 | ||||
243 | StringRef CGDebugInfo::getFunctionName(const FunctionDecl *FD) { | |||
244 | assert(FD && "Invalid FunctionDecl!")((FD && "Invalid FunctionDecl!") ? static_cast<void > (0) : __assert_fail ("FD && \"Invalid FunctionDecl!\"" , "/build/llvm-toolchain-snapshot-10~svn374877/tools/clang/lib/CodeGen/CGDebugInfo.cpp" , 244, __PRETTY_FUNCTION__)); | |||
245 | IdentifierInfo *FII = FD->getIdentifier(); | |||
246 | FunctionTemplateSpecializationInfo *Info = | |||
247 | FD->getTemplateSpecializationInfo(); | |||
248 | ||||
249 | // Emit the unqualified name in normal operation. LLVM and the debugger can | |||
250 | // compute the fully qualified name from the scope chain. If we're only | |||
251 | // emitting line table info, there won't be any scope chains, so emit the | |||
252 | // fully qualified name here so that stack traces are more accurate. | |||
253 | // FIXME: Do this when emitting DWARF as well as when emitting CodeView after | |||
254 | // evaluating the size impact. | |||
255 | bool UseQualifiedName = DebugKind == codegenoptions::DebugLineTablesOnly && | |||
256 | CGM.getCodeGenOpts().EmitCodeView; | |||
257 | ||||
258 | if (!Info && FII && !UseQualifiedName) | |||
259 | return FII->getName(); | |||
260 | ||||
261 | SmallString<128> NS; | |||
262 | llvm::raw_svector_ostream OS(NS); | |||
263 | if (!UseQualifiedName) | |||
264 | FD->printName(OS); | |||
265 | else | |||
266 | FD->printQualifiedName(OS, getPrintingPolicy()); | |||
267 | ||||
268 | // Add any template specialization args. | |||
269 | if (Info) { | |||
270 | const TemplateArgumentList *TArgs = Info->TemplateArguments; | |||
271 | printTemplateArgumentList(OS, TArgs->asArray(), getPrintingPolicy()); | |||
272 | } | |||
273 | ||||
274 | // Copy this name on the side and use its reference. | |||
275 | return internString(OS.str()); | |||
276 | } | |||
277 | ||||
278 | StringRef CGDebugInfo::getObjCMethodName(const ObjCMethodDecl *OMD) { | |||
279 | SmallString<256> MethodName; | |||
280 | llvm::raw_svector_ostream OS(MethodName); | |||
281 | OS << (OMD->isInstanceMethod() ? '-' : '+') << '['; | |||
282 | const DeclContext *DC = OMD->getDeclContext(); | |||
283 | if (const auto *OID = dyn_cast<ObjCImplementationDecl>(DC)) { | |||
284 | OS << OID->getName(); | |||
285 | } else if (const auto *OID = dyn_cast<ObjCInterfaceDecl>(DC)) { | |||
286 | OS << OID->getName(); | |||
287 | } else if (const auto *OC = dyn_cast<ObjCCategoryDecl>(DC)) { | |||
288 | if (OC->IsClassExtension()) { | |||
289 | OS << OC->getClassInterface()->getName(); | |||
290 | } else { | |||
291 | OS << OC->getIdentifier()->getNameStart() << '(' | |||
292 | << OC->getIdentifier()->getNameStart() << ')'; | |||
293 | } | |||
294 | } else if (const auto *OCD = dyn_cast<ObjCCategoryImplDecl>(DC)) { | |||
295 | OS << OCD->getClassInterface()->getName() << '(' << OCD->getName() << ')'; | |||
296 | } else if (isa<ObjCProtocolDecl>(DC)) { | |||
297 | // We can extract the type of the class from the self pointer. | |||
298 | if (ImplicitParamDecl *SelfDecl = OMD->getSelfDecl()) { | |||
299 | QualType ClassTy = | |||
300 | cast<ObjCObjectPointerType>(SelfDecl->getType())->getPointeeType(); | |||
301 | ClassTy.print(OS, PrintingPolicy(LangOptions())); | |||
302 | } | |||
303 | } | |||
304 | OS << ' ' << OMD->getSelector().getAsString() << ']'; | |||
305 | ||||
306 | return internString(OS.str()); | |||
307 | } | |||
308 | ||||
309 | StringRef CGDebugInfo::getSelectorName(Selector S) { | |||
310 | return internString(S.getAsString()); | |||
311 | } | |||
312 | ||||
313 | StringRef CGDebugInfo::getClassName(const RecordDecl *RD) { | |||
314 | if (isa<ClassTemplateSpecializationDecl>(RD)) { | |||
315 | SmallString<128> Name; | |||
316 | llvm::raw_svector_ostream OS(Name); | |||
317 | RD->getNameForDiagnostic(OS, getPrintingPolicy(), | |||
318 | /*Qualified*/ false); | |||
319 | ||||
320 | // Copy this name on the side and use its reference. | |||
321 | return internString(Name); | |||
322 | } | |||
323 | ||||
324 | // quick optimization to avoid having to intern strings that are already | |||
325 | // stored reliably elsewhere | |||
326 | if (const IdentifierInfo *II = RD->getIdentifier()) | |||
327 | return II->getName(); | |||
328 | ||||
329 | // The CodeView printer in LLVM wants to see the names of unnamed types: it is | |||
330 | // used to reconstruct the fully qualified type names. | |||
331 | if (CGM.getCodeGenOpts().EmitCodeView) { | |||
332 | if (const TypedefNameDecl *D = RD->getTypedefNameForAnonDecl()) { | |||
333 | 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-10~svn374877/tools/clang/lib/CodeGen/CGDebugInfo.cpp" , 334, __PRETTY_FUNCTION__)) | |||
334 | "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-10~svn374877/tools/clang/lib/CodeGen/CGDebugInfo.cpp" , 334, __PRETTY_FUNCTION__)); | |||
335 | 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-10~svn374877/tools/clang/lib/CodeGen/CGDebugInfo.cpp" , 336, __PRETTY_FUNCTION__)) | |||
336 | "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-10~svn374877/tools/clang/lib/CodeGen/CGDebugInfo.cpp" , 336, __PRETTY_FUNCTION__)); | |||
337 | return D->getDeclName().getAsIdentifierInfo()->getName(); | |||
338 | } | |||
339 | ||||
340 | if (CGM.getLangOpts().CPlusPlus) { | |||
341 | StringRef Name; | |||
342 | ||||
343 | ASTContext &Context = CGM.getContext(); | |||
344 | if (const DeclaratorDecl *DD = Context.getDeclaratorForUnnamedTagDecl(RD)) | |||
345 | // Anonymous types without a name for linkage purposes have their | |||
346 | // declarator mangled in if they have one. | |||
347 | Name = DD->getName(); | |||
348 | else if (const TypedefNameDecl *TND = | |||
349 | Context.getTypedefNameForUnnamedTagDecl(RD)) | |||
350 | // Anonymous types without a name for linkage purposes have their | |||
351 | // associate typedef mangled in if they have one. | |||
352 | Name = TND->getName(); | |||
353 | ||||
354 | if (!Name.empty()) { | |||
355 | SmallString<256> UnnamedType("<unnamed-type-"); | |||
356 | UnnamedType += Name; | |||
357 | UnnamedType += '>'; | |||
358 | return internString(UnnamedType); | |||
359 | } | |||
360 | } | |||
361 | } | |||
362 | ||||
363 | return StringRef(); | |||
364 | } | |||
365 | ||||
366 | Optional<llvm::DIFile::ChecksumKind> | |||
367 | CGDebugInfo::computeChecksum(FileID FID, SmallString<32> &Checksum) const { | |||
368 | Checksum.clear(); | |||
369 | ||||
370 | if (!CGM.getCodeGenOpts().EmitCodeView && | |||
371 | CGM.getCodeGenOpts().DwarfVersion < 5) | |||
372 | return None; | |||
373 | ||||
374 | SourceManager &SM = CGM.getContext().getSourceManager(); | |||
375 | bool Invalid; | |||
376 | const llvm::MemoryBuffer *MemBuffer = SM.getBuffer(FID, &Invalid); | |||
377 | if (Invalid) | |||
378 | return None; | |||
379 | ||||
380 | llvm::MD5 Hash; | |||
381 | llvm::MD5::MD5Result Result; | |||
382 | ||||
383 | Hash.update(MemBuffer->getBuffer()); | |||
384 | Hash.final(Result); | |||
385 | ||||
386 | Hash.stringifyResult(Result, Checksum); | |||
387 | return llvm::DIFile::CSK_MD5; | |||
388 | } | |||
389 | ||||
390 | Optional<StringRef> CGDebugInfo::getSource(const SourceManager &SM, | |||
391 | FileID FID) { | |||
392 | if (!CGM.getCodeGenOpts().EmbedSource) | |||
393 | return None; | |||
394 | ||||
395 | bool SourceInvalid = false; | |||
396 | StringRef Source = SM.getBufferData(FID, &SourceInvalid); | |||
397 | ||||
398 | if (SourceInvalid) | |||
399 | return None; | |||
400 | ||||
401 | return Source; | |||
402 | } | |||
403 | ||||
404 | llvm::DIFile *CGDebugInfo::getOrCreateFile(SourceLocation Loc) { | |||
405 | if (!Loc.isValid()) | |||
406 | // If Location is not valid then use main input file. | |||
407 | return TheCU->getFile(); | |||
408 | ||||
409 | SourceManager &SM = CGM.getContext().getSourceManager(); | |||
410 | PresumedLoc PLoc = SM.getPresumedLoc(Loc); | |||
411 | ||||
412 | StringRef FileName = PLoc.getFilename(); | |||
413 | if (PLoc.isInvalid() || FileName.empty()) | |||
414 | // If the location is not valid then use main input file. | |||
415 | return TheCU->getFile(); | |||
416 | ||||
417 | // Cache the results. | |||
418 | auto It = DIFileCache.find(FileName.data()); | |||
419 | if (It != DIFileCache.end()) { | |||
420 | // Verify that the information still exists. | |||
421 | if (llvm::Metadata *V = It->second) | |||
422 | return cast<llvm::DIFile>(V); | |||
423 | } | |||
424 | ||||
425 | SmallString<32> Checksum; | |||
426 | ||||
427 | // Compute the checksum if possible. If the location is affected by a #line | |||
428 | // directive that refers to a file, PLoc will have an invalid FileID, and we | |||
429 | // will correctly get no checksum. | |||
430 | Optional<llvm::DIFile::ChecksumKind> CSKind = | |||
431 | computeChecksum(PLoc.getFileID(), Checksum); | |||
432 | Optional<llvm::DIFile::ChecksumInfo<StringRef>> CSInfo; | |||
433 | if (CSKind) | |||
434 | CSInfo.emplace(*CSKind, Checksum); | |||
435 | return createFile(FileName, CSInfo, getSource(SM, SM.getFileID(Loc))); | |||
436 | } | |||
437 | ||||
438 | llvm::DIFile * | |||
439 | CGDebugInfo::createFile(StringRef FileName, | |||
440 | Optional<llvm::DIFile::ChecksumInfo<StringRef>> CSInfo, | |||
441 | Optional<StringRef> Source) { | |||
442 | StringRef Dir; | |||
443 | StringRef File; | |||
444 | std::string RemappedFile = remapDIPath(FileName); | |||
445 | std::string CurDir = remapDIPath(getCurrentDirname()); | |||
446 | SmallString<128> DirBuf; | |||
447 | SmallString<128> FileBuf; | |||
448 | if (llvm::sys::path::is_absolute(RemappedFile)) { | |||
449 | // Strip the common prefix (if it is more than just "/") from current | |||
450 | // directory and FileName for a more space-efficient encoding. | |||
451 | auto FileIt = llvm::sys::path::begin(RemappedFile); | |||
452 | auto FileE = llvm::sys::path::end(RemappedFile); | |||
453 | auto CurDirIt = llvm::sys::path::begin(CurDir); | |||
454 | auto CurDirE = llvm::sys::path::end(CurDir); | |||
455 | for (; CurDirIt != CurDirE && *CurDirIt == *FileIt; ++CurDirIt, ++FileIt) | |||
456 | llvm::sys::path::append(DirBuf, *CurDirIt); | |||
457 | if (std::distance(llvm::sys::path::begin(CurDir), CurDirIt) == 1) { | |||
458 | // Don't strip the common prefix if it is only the root "/" | |||
459 | // since that would make LLVM diagnostic locations confusing. | |||
460 | Dir = {}; | |||
461 | File = RemappedFile; | |||
462 | } else { | |||
463 | for (; FileIt != FileE; ++FileIt) | |||
464 | llvm::sys::path::append(FileBuf, *FileIt); | |||
465 | Dir = DirBuf; | |||
466 | File = FileBuf; | |||
467 | } | |||
468 | } else { | |||
469 | Dir = CurDir; | |||
470 | File = RemappedFile; | |||
471 | } | |||
472 | llvm::DIFile *F = DBuilder.createFile(File, Dir, CSInfo, Source); | |||
473 | DIFileCache[FileName.data()].reset(F); | |||
474 | return F; | |||
475 | } | |||
476 | ||||
477 | std::string CGDebugInfo::remapDIPath(StringRef Path) const { | |||
478 | for (const auto &Entry : DebugPrefixMap) | |||
479 | if (Path.startswith(Entry.first)) | |||
480 | return (Twine(Entry.second) + Path.substr(Entry.first.size())).str(); | |||
481 | return Path.str(); | |||
482 | } | |||
483 | ||||
484 | unsigned CGDebugInfo::getLineNumber(SourceLocation Loc) { | |||
485 | if (Loc.isInvalid() && CurLoc.isInvalid()) | |||
486 | return 0; | |||
487 | SourceManager &SM = CGM.getContext().getSourceManager(); | |||
488 | PresumedLoc PLoc = SM.getPresumedLoc(Loc.isValid() ? Loc : CurLoc); | |||
489 | return PLoc.isValid() ? PLoc.getLine() : 0; | |||
490 | } | |||
491 | ||||
492 | unsigned CGDebugInfo::getColumnNumber(SourceLocation Loc, bool Force) { | |||
493 | // We may not want column information at all. | |||
494 | if (!Force && !CGM.getCodeGenOpts().DebugColumnInfo) | |||
495 | return 0; | |||
496 | ||||
497 | // If the location is invalid then use the current column. | |||
498 | if (Loc.isInvalid() && CurLoc.isInvalid()) | |||
499 | return 0; | |||
500 | SourceManager &SM = CGM.getContext().getSourceManager(); | |||
501 | PresumedLoc PLoc = SM.getPresumedLoc(Loc.isValid() ? Loc : CurLoc); | |||
502 | return PLoc.isValid() ? PLoc.getColumn() : 0; | |||
503 | } | |||
504 | ||||
505 | StringRef CGDebugInfo::getCurrentDirname() { | |||
506 | if (!CGM.getCodeGenOpts().DebugCompilationDir.empty()) | |||
507 | return CGM.getCodeGenOpts().DebugCompilationDir; | |||
508 | ||||
509 | if (!CWDName.empty()) | |||
510 | return CWDName; | |||
511 | SmallString<256> CWD; | |||
512 | llvm::sys::fs::current_path(CWD); | |||
513 | return CWDName = internString(CWD); | |||
514 | } | |||
515 | ||||
516 | void CGDebugInfo::CreateCompileUnit() { | |||
517 | SmallString<32> Checksum; | |||
518 | Optional<llvm::DIFile::ChecksumKind> CSKind; | |||
519 | Optional<llvm::DIFile::ChecksumInfo<StringRef>> CSInfo; | |||
520 | ||||
521 | // Should we be asking the SourceManager for the main file name, instead of | |||
522 | // accepting it as an argument? This just causes the main file name to | |||
523 | // mismatch with source locations and create extra lexical scopes or | |||
524 | // mismatched debug info (a CU with a DW_AT_file of "-", because that's what | |||
525 | // the driver passed, but functions/other things have DW_AT_file of "<stdin>" | |||
526 | // because that's what the SourceManager says) | |||
527 | ||||
528 | // Get absolute path name. | |||
529 | SourceManager &SM = CGM.getContext().getSourceManager(); | |||
530 | std::string MainFileName = CGM.getCodeGenOpts().MainFileName; | |||
531 | if (MainFileName.empty()) | |||
532 | MainFileName = "<stdin>"; | |||
533 | ||||
534 | // The main file name provided via the "-main-file-name" option contains just | |||
535 | // the file name itself with no path information. This file name may have had | |||
536 | // a relative path, so we look into the actual file entry for the main | |||
537 | // file to determine the real absolute path for the file. | |||
538 | std::string MainFileDir; | |||
539 | if (const FileEntry *MainFile = SM.getFileEntryForID(SM.getMainFileID())) { | |||
540 | MainFileDir = remapDIPath(MainFile->getDir()->getName()); | |||
541 | if (MainFileDir != ".") { | |||
542 | llvm::SmallString<1024> MainFileDirSS(MainFileDir); | |||
543 | llvm::sys::path::append(MainFileDirSS, MainFileName); | |||
544 | MainFileName = MainFileDirSS.str(); | |||
545 | } | |||
546 | // If the main file name provided is identical to the input file name, and | |||
547 | // if the input file is a preprocessed source, use the module name for | |||
548 | // debug info. The module name comes from the name specified in the first | |||
549 | // linemarker if the input is a preprocessed source. | |||
550 | if (MainFile->getName() == MainFileName && | |||
551 | FrontendOptions::getInputKindForExtension( | |||
552 | MainFile->getName().rsplit('.').second) | |||
553 | .isPreprocessed()) | |||
554 | MainFileName = CGM.getModule().getName().str(); | |||
555 | ||||
556 | CSKind = computeChecksum(SM.getMainFileID(), Checksum); | |||
557 | } | |||
558 | ||||
559 | llvm::dwarf::SourceLanguage LangTag; | |||
560 | const LangOptions &LO = CGM.getLangOpts(); | |||
561 | if (LO.CPlusPlus) { | |||
562 | if (LO.ObjC) | |||
563 | LangTag = llvm::dwarf::DW_LANG_ObjC_plus_plus; | |||
564 | else if (LO.CPlusPlus14) | |||
565 | LangTag = llvm::dwarf::DW_LANG_C_plus_plus_14; | |||
566 | else if (LO.CPlusPlus11) | |||
567 | LangTag = llvm::dwarf::DW_LANG_C_plus_plus_11; | |||
568 | else | |||
569 | LangTag = llvm::dwarf::DW_LANG_C_plus_plus; | |||
570 | } else if (LO.ObjC) { | |||
571 | LangTag = llvm::dwarf::DW_LANG_ObjC; | |||
572 | } else if (LO.RenderScript) { | |||
573 | LangTag = llvm::dwarf::DW_LANG_GOOGLE_RenderScript; | |||
574 | } else if (LO.C99) { | |||
575 | LangTag = llvm::dwarf::DW_LANG_C99; | |||
576 | } else { | |||
577 | LangTag = llvm::dwarf::DW_LANG_C89; | |||
578 | } | |||
579 | ||||
580 | std::string Producer = getClangFullVersion(); | |||
581 | ||||
582 | // Figure out which version of the ObjC runtime we have. | |||
583 | unsigned RuntimeVers = 0; | |||
584 | if (LO.ObjC) | |||
585 | RuntimeVers = LO.ObjCRuntime.isNonFragile() ? 2 : 1; | |||
586 | ||||
587 | llvm::DICompileUnit::DebugEmissionKind EmissionKind; | |||
588 | switch (DebugKind) { | |||
589 | case codegenoptions::NoDebugInfo: | |||
590 | case codegenoptions::LocTrackingOnly: | |||
591 | EmissionKind = llvm::DICompileUnit::NoDebug; | |||
592 | break; | |||
593 | case codegenoptions::DebugLineTablesOnly: | |||
594 | EmissionKind = llvm::DICompileUnit::LineTablesOnly; | |||
595 | break; | |||
596 | case codegenoptions::DebugDirectivesOnly: | |||
597 | EmissionKind = llvm::DICompileUnit::DebugDirectivesOnly; | |||
598 | break; | |||
599 | case codegenoptions::LimitedDebugInfo: | |||
600 | case codegenoptions::FullDebugInfo: | |||
601 | EmissionKind = llvm::DICompileUnit::FullDebug; | |||
602 | break; | |||
603 | } | |||
604 | ||||
605 | uint64_t DwoId = 0; | |||
606 | auto &CGOpts = CGM.getCodeGenOpts(); | |||
607 | // The DIFile used by the CU is distinct from the main source | |||
608 | // file. Its directory part specifies what becomes the | |||
609 | // DW_AT_comp_dir (the compilation directory), even if the source | |||
610 | // file was specified with an absolute path. | |||
611 | if (CSKind) | |||
612 | CSInfo.emplace(*CSKind, Checksum); | |||
613 | llvm::DIFile *CUFile = DBuilder.createFile( | |||
614 | remapDIPath(MainFileName), remapDIPath(getCurrentDirname()), CSInfo, | |||
615 | getSource(SM, SM.getMainFileID())); | |||
616 | ||||
617 | // Create new compile unit. | |||
618 | TheCU = DBuilder.createCompileUnit( | |||
619 | LangTag, CUFile, CGOpts.EmitVersionIdentMetadata ? Producer : "", | |||
620 | LO.Optimize || CGOpts.PrepareForLTO || CGOpts.PrepareForThinLTO, | |||
621 | CGOpts.DwarfDebugFlags, RuntimeVers, CGOpts.SplitDwarfFile, EmissionKind, | |||
622 | DwoId, CGOpts.SplitDwarfInlining, CGOpts.DebugInfoForProfiling, | |||
623 | CGM.getTarget().getTriple().isNVPTX() | |||
624 | ? llvm::DICompileUnit::DebugNameTableKind::None | |||
625 | : static_cast<llvm::DICompileUnit::DebugNameTableKind>( | |||
626 | CGOpts.DebugNameTable), | |||
627 | CGOpts.DebugRangesBaseAddress); | |||
628 | } | |||
629 | ||||
630 | llvm::DIType *CGDebugInfo::CreateType(const BuiltinType *BT) { | |||
631 | llvm::dwarf::TypeKind Encoding; | |||
632 | StringRef BTName; | |||
633 | switch (BT->getKind()) { | |||
634 | #define BUILTIN_TYPE(Id, SingletonId) | |||
635 | #define PLACEHOLDER_TYPE(Id, SingletonId) case BuiltinType::Id: | |||
636 | #include "clang/AST/BuiltinTypes.def" | |||
637 | case BuiltinType::Dependent: | |||
638 | llvm_unreachable("Unexpected builtin type")::llvm::llvm_unreachable_internal("Unexpected builtin type", "/build/llvm-toolchain-snapshot-10~svn374877/tools/clang/lib/CodeGen/CGDebugInfo.cpp" , 638); | |||
639 | case BuiltinType::NullPtr: | |||
640 | return DBuilder.createNullPtrType(); | |||
641 | case BuiltinType::Void: | |||
642 | return nullptr; | |||
643 | case BuiltinType::ObjCClass: | |||
644 | if (!ClassTy) | |||
645 | ClassTy = | |||
646 | DBuilder.createForwardDecl(llvm::dwarf::DW_TAG_structure_type, | |||
647 | "objc_class", TheCU, TheCU->getFile(), 0); | |||
648 | return ClassTy; | |||
649 | case BuiltinType::ObjCId: { | |||
650 | // typedef struct objc_class *Class; | |||
651 | // typedef struct objc_object { | |||
652 | // Class isa; | |||
653 | // } *id; | |||
654 | ||||
655 | if (ObjTy) | |||
656 | return ObjTy; | |||
657 | ||||
658 | if (!ClassTy) | |||
659 | ClassTy = | |||
660 | DBuilder.createForwardDecl(llvm::dwarf::DW_TAG_structure_type, | |||
661 | "objc_class", TheCU, TheCU->getFile(), 0); | |||
662 | ||||
663 | unsigned Size = CGM.getContext().getTypeSize(CGM.getContext().VoidPtrTy); | |||
664 | ||||
665 | auto *ISATy = DBuilder.createPointerType(ClassTy, Size); | |||
666 | ||||
667 | ObjTy = DBuilder.createStructType(TheCU, "objc_object", TheCU->getFile(), 0, | |||
668 | 0, 0, llvm::DINode::FlagZero, nullptr, | |||
669 | llvm::DINodeArray()); | |||
670 | ||||
671 | DBuilder.replaceArrays( | |||
672 | ObjTy, DBuilder.getOrCreateArray(&*DBuilder.createMemberType( | |||
673 | ObjTy, "isa", TheCU->getFile(), 0, Size, 0, 0, | |||
674 | llvm::DINode::FlagZero, ISATy))); | |||
675 | return ObjTy; | |||
676 | } | |||
677 | case BuiltinType::ObjCSel: { | |||
678 | if (!SelTy) | |||
679 | SelTy = DBuilder.createForwardDecl(llvm::dwarf::DW_TAG_structure_type, | |||
680 | "objc_selector", TheCU, | |||
681 | TheCU->getFile(), 0); | |||
682 | return SelTy; | |||
683 | } | |||
684 | ||||
685 | #define IMAGE_TYPE(ImgType, Id, SingletonId, Access, Suffix) \ | |||
686 | case BuiltinType::Id: \ | |||
687 | return getOrCreateStructPtrType("opencl_" #ImgType "_" #Suffix "_t", \ | |||
688 | SingletonId); | |||
689 | #include "clang/Basic/OpenCLImageTypes.def" | |||
690 | case BuiltinType::OCLSampler: | |||
691 | return getOrCreateStructPtrType("opencl_sampler_t", OCLSamplerDITy); | |||
692 | case BuiltinType::OCLEvent: | |||
693 | return getOrCreateStructPtrType("opencl_event_t", OCLEventDITy); | |||
694 | case BuiltinType::OCLClkEvent: | |||
695 | return getOrCreateStructPtrType("opencl_clk_event_t", OCLClkEventDITy); | |||
696 | case BuiltinType::OCLQueue: | |||
697 | return getOrCreateStructPtrType("opencl_queue_t", OCLQueueDITy); | |||
698 | case BuiltinType::OCLReserveID: | |||
699 | return getOrCreateStructPtrType("opencl_reserve_id_t", OCLReserveIDDITy); | |||
700 | #define EXT_OPAQUE_TYPE(ExtType, Id, Ext) \ | |||
701 | case BuiltinType::Id: \ | |||
702 | return getOrCreateStructPtrType("opencl_" #ExtType, Id##Ty); | |||
703 | #include "clang/Basic/OpenCLExtensionTypes.def" | |||
704 | // TODO: real support for SVE types requires more infrastructure | |||
705 | // to be added first. The types have a variable length and are | |||
706 | // represented in debug info as types whose length depends on a | |||
707 | // target-specific pseudo register. | |||
708 | #define SVE_TYPE(Name, Id, SingletonId) \ | |||
709 | case BuiltinType::Id: | |||
710 | #include "clang/Basic/AArch64SVEACLETypes.def" | |||
711 | { | |||
712 | unsigned DiagID = CGM.getDiags().getCustomDiagID( | |||
713 | DiagnosticsEngine::Error, | |||
714 | "cannot yet generate debug info for SVE type '%0'"); | |||
715 | auto Name = BT->getName(CGM.getContext().getPrintingPolicy()); | |||
716 | CGM.getDiags().Report(DiagID) << Name; | |||
717 | // Return something safe. | |||
718 | return CreateType(cast<const BuiltinType>(CGM.getContext().IntTy)); | |||
719 | } | |||
720 | ||||
721 | case BuiltinType::UChar: | |||
722 | case BuiltinType::Char_U: | |||
723 | Encoding = llvm::dwarf::DW_ATE_unsigned_char; | |||
724 | break; | |||
725 | case BuiltinType::Char_S: | |||
726 | case BuiltinType::SChar: | |||
727 | Encoding = llvm::dwarf::DW_ATE_signed_char; | |||
728 | break; | |||
729 | case BuiltinType::Char8: | |||
730 | case BuiltinType::Char16: | |||
731 | case BuiltinType::Char32: | |||
732 | Encoding = llvm::dwarf::DW_ATE_UTF; | |||
733 | break; | |||
734 | case BuiltinType::UShort: | |||
735 | case BuiltinType::UInt: | |||
736 | case BuiltinType::UInt128: | |||
737 | case BuiltinType::ULong: | |||
738 | case BuiltinType::WChar_U: | |||
739 | case BuiltinType::ULongLong: | |||
740 | Encoding = llvm::dwarf::DW_ATE_unsigned; | |||
741 | break; | |||
742 | case BuiltinType::Short: | |||
743 | case BuiltinType::Int: | |||
744 | case BuiltinType::Int128: | |||
745 | case BuiltinType::Long: | |||
746 | case BuiltinType::WChar_S: | |||
747 | case BuiltinType::LongLong: | |||
748 | Encoding = llvm::dwarf::DW_ATE_signed; | |||
749 | break; | |||
750 | case BuiltinType::Bool: | |||
751 | Encoding = llvm::dwarf::DW_ATE_boolean; | |||
752 | break; | |||
753 | case BuiltinType::Half: | |||
754 | case BuiltinType::Float: | |||
755 | case BuiltinType::LongDouble: | |||
756 | case BuiltinType::Float16: | |||
757 | case BuiltinType::Float128: | |||
758 | case BuiltinType::Double: | |||
759 | // FIXME: For targets where long double and __float128 have the same size, | |||
760 | // they are currently indistinguishable in the debugger without some | |||
761 | // special treatment. However, there is currently no consensus on encoding | |||
762 | // and this should be updated once a DWARF encoding exists for distinct | |||
763 | // floating point types of the same size. | |||
764 | Encoding = llvm::dwarf::DW_ATE_float; | |||
765 | break; | |||
766 | case BuiltinType::ShortAccum: | |||
767 | case BuiltinType::Accum: | |||
768 | case BuiltinType::LongAccum: | |||
769 | case BuiltinType::ShortFract: | |||
770 | case BuiltinType::Fract: | |||
771 | case BuiltinType::LongFract: | |||
772 | case BuiltinType::SatShortFract: | |||
773 | case BuiltinType::SatFract: | |||
774 | case BuiltinType::SatLongFract: | |||
775 | case BuiltinType::SatShortAccum: | |||
776 | case BuiltinType::SatAccum: | |||
777 | case BuiltinType::SatLongAccum: | |||
778 | Encoding = llvm::dwarf::DW_ATE_signed_fixed; | |||
779 | break; | |||
780 | case BuiltinType::UShortAccum: | |||
781 | case BuiltinType::UAccum: | |||
782 | case BuiltinType::ULongAccum: | |||
783 | case BuiltinType::UShortFract: | |||
784 | case BuiltinType::UFract: | |||
785 | case BuiltinType::ULongFract: | |||
786 | case BuiltinType::SatUShortAccum: | |||
787 | case BuiltinType::SatUAccum: | |||
788 | case BuiltinType::SatULongAccum: | |||
789 | case BuiltinType::SatUShortFract: | |||
790 | case BuiltinType::SatUFract: | |||
791 | case BuiltinType::SatULongFract: | |||
792 | Encoding = llvm::dwarf::DW_ATE_unsigned_fixed; | |||
793 | break; | |||
794 | } | |||
795 | ||||
796 | switch (BT->getKind()) { | |||
797 | case BuiltinType::Long: | |||
798 | BTName = "long int"; | |||
799 | break; | |||
800 | case BuiltinType::LongLong: | |||
801 | BTName = "long long int"; | |||
802 | break; | |||
803 | case BuiltinType::ULong: | |||
804 | BTName = "long unsigned int"; | |||
805 | break; | |||
806 | case BuiltinType::ULongLong: | |||
807 | BTName = "long long unsigned int"; | |||
808 | break; | |||
809 | default: | |||
810 | BTName = BT->getName(CGM.getLangOpts()); | |||
811 | break; | |||
812 | } | |||
813 | // Bit size and offset of the type. | |||
814 | uint64_t Size = CGM.getContext().getTypeSize(BT); | |||
815 | return DBuilder.createBasicType(BTName, Size, Encoding); | |||
816 | } | |||
817 | ||||
818 | llvm::DIType *CGDebugInfo::CreateType(const ComplexType *Ty) { | |||
819 | // Bit size and offset of the type. | |||
820 | llvm::dwarf::TypeKind Encoding = llvm::dwarf::DW_ATE_complex_float; | |||
821 | if (Ty->isComplexIntegerType()) | |||
822 | Encoding = llvm::dwarf::DW_ATE_lo_user; | |||
823 | ||||
824 | uint64_t Size = CGM.getContext().getTypeSize(Ty); | |||
825 | return DBuilder.createBasicType("complex", Size, Encoding); | |||
826 | } | |||
827 | ||||
828 | llvm::DIType *CGDebugInfo::CreateQualifiedType(QualType Ty, | |||
829 | llvm::DIFile *Unit) { | |||
830 | QualifierCollector Qc; | |||
831 | const Type *T = Qc.strip(Ty); | |||
832 | ||||
833 | // Ignore these qualifiers for now. | |||
834 | Qc.removeObjCGCAttr(); | |||
835 | Qc.removeAddressSpace(); | |||
836 | Qc.removeObjCLifetime(); | |||
837 | ||||
838 | // We will create one Derived type for one qualifier and recurse to handle any | |||
839 | // additional ones. | |||
840 | llvm::dwarf::Tag Tag; | |||
841 | if (Qc.hasConst()) { | |||
842 | Tag = llvm::dwarf::DW_TAG_const_type; | |||
843 | Qc.removeConst(); | |||
844 | } else if (Qc.hasVolatile()) { | |||
845 | Tag = llvm::dwarf::DW_TAG_volatile_type; | |||
846 | Qc.removeVolatile(); | |||
847 | } else if (Qc.hasRestrict()) { | |||
848 | Tag = llvm::dwarf::DW_TAG_restrict_type; | |||
849 | Qc.removeRestrict(); | |||
850 | } else { | |||
851 | 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-10~svn374877/tools/clang/lib/CodeGen/CGDebugInfo.cpp" , 851, __PRETTY_FUNCTION__)); | |||
852 | return getOrCreateType(QualType(T, 0), Unit); | |||
853 | } | |||
854 | ||||
855 | auto *FromTy = getOrCreateType(Qc.apply(CGM.getContext(), T), Unit); | |||
856 | ||||
857 | // No need to fill in the Name, Line, Size, Alignment, Offset in case of | |||
858 | // CVR derived types. | |||
859 | return DBuilder.createQualifiedType(Tag, FromTy); | |||
860 | } | |||
861 | ||||
862 | llvm::DIType *CGDebugInfo::CreateType(const ObjCObjectPointerType *Ty, | |||
863 | llvm::DIFile *Unit) { | |||
864 | ||||
865 | // The frontend treats 'id' as a typedef to an ObjCObjectType, | |||
866 | // whereas 'id<protocol>' is treated as an ObjCPointerType. For the | |||
867 | // debug info, we want to emit 'id' in both cases. | |||
868 | if (Ty->isObjCQualifiedIdType()) | |||
869 | return getOrCreateType(CGM.getContext().getObjCIdType(), Unit); | |||
870 | ||||
871 | return CreatePointerLikeType(llvm::dwarf::DW_TAG_pointer_type, Ty, | |||
872 | Ty->getPointeeType(), Unit); | |||
873 | } | |||
874 | ||||
875 | llvm::DIType *CGDebugInfo::CreateType(const PointerType *Ty, | |||
876 | llvm::DIFile *Unit) { | |||
877 | return CreatePointerLikeType(llvm::dwarf::DW_TAG_pointer_type, Ty, | |||
878 | Ty->getPointeeType(), Unit); | |||
879 | } | |||
880 | ||||
881 | /// \return whether a C++ mangling exists for the type defined by TD. | |||
882 | static bool hasCXXMangling(const TagDecl *TD, llvm::DICompileUnit *TheCU) { | |||
883 | switch (TheCU->getSourceLanguage()) { | |||
884 | case llvm::dwarf::DW_LANG_C_plus_plus: | |||
885 | case llvm::dwarf::DW_LANG_C_plus_plus_11: | |||
886 | case llvm::dwarf::DW_LANG_C_plus_plus_14: | |||
887 | return true; | |||
888 | case llvm::dwarf::DW_LANG_ObjC_plus_plus: | |||
889 | return isa<CXXRecordDecl>(TD) || isa<EnumDecl>(TD); | |||
890 | default: | |||
891 | return false; | |||
892 | } | |||
893 | } | |||
894 | ||||
895 | // Determines if the debug info for this tag declaration needs a type | |||
896 | // identifier. The purpose of the unique identifier is to deduplicate type | |||
897 | // information for identical types across TUs. Because of the C++ one definition | |||
898 | // rule (ODR), it is valid to assume that the type is defined the same way in | |||
899 | // every TU and its debug info is equivalent. | |||
900 | // | |||
901 | // C does not have the ODR, and it is common for codebases to contain multiple | |||
902 | // different definitions of a struct with the same name in different TUs. | |||
903 | // Therefore, if the type doesn't have a C++ mangling, don't give it an | |||
904 | // identifer. Type information in C is smaller and simpler than C++ type | |||
905 | // information, so the increase in debug info size is negligible. | |||
906 | // | |||
907 | // If the type is not externally visible, it should be unique to the current TU, | |||
908 | // and should not need an identifier to participate in type deduplication. | |||
909 | // However, when emitting CodeView, the format internally uses these | |||
910 | // unique type name identifers for references between debug info. For example, | |||
911 | // the method of a class in an anonymous namespace uses the identifer to refer | |||
912 | // to its parent class. The Microsoft C++ ABI attempts to provide unique names | |||
913 | // for such types, so when emitting CodeView, always use identifiers for C++ | |||
914 | // types. This may create problems when attempting to emit CodeView when the MS | |||
915 | // C++ ABI is not in use. | |||
916 | static bool needsTypeIdentifier(const TagDecl *TD, CodeGenModule &CGM, | |||
917 | llvm::DICompileUnit *TheCU) { | |||
918 | // We only add a type identifier for types with C++ name mangling. | |||
919 | if (!hasCXXMangling(TD, TheCU)) | |||
920 | return false; | |||
921 | ||||
922 | // Externally visible types with C++ mangling need a type identifier. | |||
923 | if (TD->isExternallyVisible()) | |||
924 | return true; | |||
925 | ||||
926 | // CodeView types with C++ mangling need a type identifier. | |||
927 | if (CGM.getCodeGenOpts().EmitCodeView) | |||
928 | return true; | |||
929 | ||||
930 | return false; | |||
931 | } | |||
932 | ||||
933 | // Returns a unique type identifier string if one exists, or an empty string. | |||
934 | static SmallString<256> getTypeIdentifier(const TagType *Ty, CodeGenModule &CGM, | |||
935 | llvm::DICompileUnit *TheCU) { | |||
936 | SmallString<256> Identifier; | |||
937 | const TagDecl *TD = Ty->getDecl(); | |||
938 | ||||
939 | if (!needsTypeIdentifier(TD, CGM, TheCU)) | |||
940 | return Identifier; | |||
941 | if (const auto *RD = dyn_cast<CXXRecordDecl>(TD)) | |||
942 | if (RD->getDefinition()) | |||
943 | if (RD->isDynamicClass() && | |||
944 | CGM.getVTableLinkage(RD) == llvm::GlobalValue::ExternalLinkage) | |||
945 | return Identifier; | |||
946 | ||||
947 | // TODO: This is using the RTTI name. Is there a better way to get | |||
948 | // a unique string for a type? | |||
949 | llvm::raw_svector_ostream Out(Identifier); | |||
950 | CGM.getCXXABI().getMangleContext().mangleCXXRTTIName(QualType(Ty, 0), Out); | |||
951 | return Identifier; | |||
952 | } | |||
953 | ||||
954 | /// \return the appropriate DWARF tag for a composite type. | |||
955 | static llvm::dwarf::Tag getTagForRecord(const RecordDecl *RD) { | |||
956 | llvm::dwarf::Tag Tag; | |||
957 | if (RD->isStruct() || RD->isInterface()) | |||
958 | Tag = llvm::dwarf::DW_TAG_structure_type; | |||
959 | else if (RD->isUnion()) | |||
960 | Tag = llvm::dwarf::DW_TAG_union_type; | |||
961 | else { | |||
962 | // FIXME: This could be a struct type giving a default visibility different | |||
963 | // than C++ class type, but needs llvm metadata changes first. | |||
964 | assert(RD->isClass())((RD->isClass()) ? static_cast<void> (0) : __assert_fail ("RD->isClass()", "/build/llvm-toolchain-snapshot-10~svn374877/tools/clang/lib/CodeGen/CGDebugInfo.cpp" , 964, __PRETTY_FUNCTION__)); | |||
965 | Tag = llvm::dwarf::DW_TAG_class_type; | |||
966 | } | |||
967 | return Tag; | |||
968 | } | |||
969 | ||||
970 | llvm::DICompositeType * | |||
971 | CGDebugInfo::getOrCreateRecordFwdDecl(const RecordType *Ty, | |||
972 | llvm::DIScope *Ctx) { | |||
973 | const RecordDecl *RD = Ty->getDecl(); | |||
974 | if (llvm::DIType *T = getTypeOrNull(CGM.getContext().getRecordType(RD))) | |||
975 | return cast<llvm::DICompositeType>(T); | |||
976 | llvm::DIFile *DefUnit = getOrCreateFile(RD->getLocation()); | |||
977 | unsigned Line = getLineNumber(RD->getLocation()); | |||
978 | StringRef RDName = getClassName(RD); | |||
979 | ||||
980 | uint64_t Size = 0; | |||
981 | uint32_t Align = 0; | |||
982 | ||||
983 | // Create the type. | |||
984 | SmallString<256> Identifier = getTypeIdentifier(Ty, CGM, TheCU); | |||
985 | llvm::DICompositeType *RetTy = DBuilder.createReplaceableCompositeType( | |||
986 | getTagForRecord(RD), RDName, Ctx, DefUnit, Line, 0, Size, Align, | |||
987 | llvm::DINode::FlagFwdDecl, Identifier); | |||
988 | if (CGM.getCodeGenOpts().DebugFwdTemplateParams) | |||
989 | if (auto *TSpecial = dyn_cast<ClassTemplateSpecializationDecl>(RD)) | |||
990 | DBuilder.replaceArrays(RetTy, llvm::DINodeArray(), | |||
991 | CollectCXXTemplateParams(TSpecial, DefUnit)); | |||
992 | ReplaceMap.emplace_back( | |||
993 | std::piecewise_construct, std::make_tuple(Ty), | |||
994 | std::make_tuple(static_cast<llvm::Metadata *>(RetTy))); | |||
995 | return RetTy; | |||
996 | } | |||
997 | ||||
998 | llvm::DIType *CGDebugInfo::CreatePointerLikeType(llvm::dwarf::Tag Tag, | |||
999 | const Type *Ty, | |||
1000 | QualType PointeeTy, | |||
1001 | llvm::DIFile *Unit) { | |||
1002 | // Bit size, align and offset of the type. | |||
1003 | // Size is always the size of a pointer. We can't use getTypeSize here | |||
1004 | // because that does not return the correct value for references. | |||
1005 | unsigned AddressSpace = CGM.getContext().getTargetAddressSpace(PointeeTy); | |||
1006 | uint64_t Size = CGM.getTarget().getPointerWidth(AddressSpace); | |||
1007 | auto Align = getTypeAlignIfRequired(Ty, CGM.getContext()); | |||
1008 | Optional<unsigned> DWARFAddressSpace = | |||
1009 | CGM.getTarget().getDWARFAddressSpace(AddressSpace); | |||
1010 | ||||
1011 | if (Tag == llvm::dwarf::DW_TAG_reference_type || | |||
1012 | Tag == llvm::dwarf::DW_TAG_rvalue_reference_type) | |||
1013 | return DBuilder.createReferenceType(Tag, getOrCreateType(PointeeTy, Unit), | |||
1014 | Size, Align, DWARFAddressSpace); | |||
1015 | else | |||
1016 | return DBuilder.createPointerType(getOrCreateType(PointeeTy, Unit), Size, | |||
1017 | Align, DWARFAddressSpace); | |||
1018 | } | |||
1019 | ||||
1020 | llvm::DIType *CGDebugInfo::getOrCreateStructPtrType(StringRef Name, | |||
1021 | llvm::DIType *&Cache) { | |||
1022 | if (Cache) | |||
1023 | return Cache; | |||
1024 | Cache = DBuilder.createForwardDecl(llvm::dwarf::DW_TAG_structure_type, Name, | |||
1025 | TheCU, TheCU->getFile(), 0); | |||
1026 | unsigned Size = CGM.getContext().getTypeSize(CGM.getContext().VoidPtrTy); | |||
1027 | Cache = DBuilder.createPointerType(Cache, Size); | |||
1028 | return Cache; | |||
1029 | } | |||
1030 | ||||
1031 | uint64_t CGDebugInfo::collectDefaultElementTypesForBlockPointer( | |||
1032 | const BlockPointerType *Ty, llvm::DIFile *Unit, llvm::DIDerivedType *DescTy, | |||
1033 | unsigned LineNo, SmallVectorImpl<llvm::Metadata *> &EltTys) { | |||
1034 | QualType FType; | |||
1035 | ||||
1036 | // Advanced by calls to CreateMemberType in increments of FType, then | |||
1037 | // returned as the overall size of the default elements. | |||
1038 | uint64_t FieldOffset = 0; | |||
1039 | ||||
1040 | // Blocks in OpenCL have unique constraints which make the standard fields | |||
1041 | // redundant while requiring size and align fields for enqueue_kernel. See | |||
1042 | // initializeForBlockHeader in CGBlocks.cpp | |||
1043 | if (CGM.getLangOpts().OpenCL) { | |||
1044 | FType = CGM.getContext().IntTy; | |||
1045 | EltTys.push_back(CreateMemberType(Unit, FType, "__size", &FieldOffset)); | |||
1046 | EltTys.push_back(CreateMemberType(Unit, FType, "__align", &FieldOffset)); | |||
1047 | } else { | |||
1048 | FType = CGM.getContext().getPointerType(CGM.getContext().VoidTy); | |||
1049 | EltTys.push_back(CreateMemberType(Unit, FType, "__isa", &FieldOffset)); | |||
1050 | FType = CGM.getContext().IntTy; | |||
1051 | EltTys.push_back(CreateMemberType(Unit, FType, "__flags", &FieldOffset)); | |||
1052 | EltTys.push_back(CreateMemberType(Unit, FType, "__reserved", &FieldOffset)); | |||
1053 | FType = CGM.getContext().getPointerType(Ty->getPointeeType()); | |||
1054 | EltTys.push_back(CreateMemberType(Unit, FType, "__FuncPtr", &FieldOffset)); | |||
1055 | FType = CGM.getContext().getPointerType(CGM.getContext().VoidTy); | |||
1056 | uint64_t FieldSize = CGM.getContext().getTypeSize(Ty); | |||
1057 | uint32_t FieldAlign = CGM.getContext().getTypeAlign(Ty); | |||
1058 | EltTys.push_back(DBuilder.createMemberType( | |||
1059 | Unit, "__descriptor", nullptr, LineNo, FieldSize, FieldAlign, | |||
1060 | FieldOffset, llvm::DINode::FlagZero, DescTy)); | |||
1061 | FieldOffset += FieldSize; | |||
1062 | } | |||
1063 | ||||
1064 | return FieldOffset; | |||
1065 | } | |||
1066 | ||||
1067 | llvm::DIType *CGDebugInfo::CreateType(const BlockPointerType *Ty, | |||
1068 | llvm::DIFile *Unit) { | |||
1069 | SmallVector<llvm::Metadata *, 8> EltTys; | |||
1070 | QualType FType; | |||
1071 | uint64_t FieldOffset; | |||
1072 | llvm::DINodeArray Elements; | |||
1073 | ||||
1074 | FieldOffset = 0; | |||
1075 | FType = CGM.getContext().UnsignedLongTy; | |||
1076 | EltTys.push_back(CreateMemberType(Unit, FType, "reserved", &FieldOffset)); | |||
1077 | EltTys.push_back(CreateMemberType(Unit, FType, "Size", &FieldOffset)); | |||
1078 | ||||
1079 | Elements = DBuilder.getOrCreateArray(EltTys); | |||
1080 | EltTys.clear(); | |||
1081 | ||||
1082 | llvm::DINode::DIFlags Flags = llvm::DINode::FlagAppleBlock; | |||
1083 | ||||
1084 | auto *EltTy = | |||
1085 | DBuilder.createStructType(Unit, "__block_descriptor", nullptr, 0, | |||
1086 | FieldOffset, 0, Flags, nullptr, Elements); | |||
1087 | ||||
1088 | // Bit size, align and offset of the type. | |||
1089 | uint64_t Size = CGM.getContext().getTypeSize(Ty); | |||
1090 | ||||
1091 | auto *DescTy = DBuilder.createPointerType(EltTy, Size); | |||
1092 | ||||
1093 | FieldOffset = collectDefaultElementTypesForBlockPointer(Ty, Unit, DescTy, | |||
1094 | 0, EltTys); | |||
1095 | ||||
1096 | Elements = DBuilder.getOrCreateArray(EltTys); | |||
1097 | ||||
1098 | // The __block_literal_generic structs are marked with a special | |||
1099 | // DW_AT_APPLE_BLOCK attribute and are an implementation detail only | |||
1100 | // the debugger needs to know about. To allow type uniquing, emit | |||
1101 | // them without a name or a location. | |||
1102 | EltTy = DBuilder.createStructType(Unit, "", nullptr, 0, FieldOffset, 0, | |||
1103 | Flags, nullptr, Elements); | |||
1104 | ||||
1105 | return DBuilder.createPointerType(EltTy, Size); | |||
1106 | } | |||
1107 | ||||
1108 | llvm::DIType *CGDebugInfo::CreateType(const TemplateSpecializationType *Ty, | |||
1109 | llvm::DIFile *Unit) { | |||
1110 | assert(Ty->isTypeAlias())((Ty->isTypeAlias()) ? static_cast<void> (0) : __assert_fail ("Ty->isTypeAlias()", "/build/llvm-toolchain-snapshot-10~svn374877/tools/clang/lib/CodeGen/CGDebugInfo.cpp" , 1110, __PRETTY_FUNCTION__)); | |||
1111 | llvm::DIType *Src = getOrCreateType(Ty->getAliasedType(), Unit); | |||
1112 | ||||
1113 | auto *AliasDecl = | |||
1114 | cast<TypeAliasTemplateDecl>(Ty->getTemplateName().getAsTemplateDecl()) | |||
1115 | ->getTemplatedDecl(); | |||
1116 | ||||
1117 | if (AliasDecl->hasAttr<NoDebugAttr>()) | |||
1118 | return Src; | |||
1119 | ||||
1120 | SmallString<128> NS; | |||
1121 | llvm::raw_svector_ostream OS(NS); | |||
1122 | Ty->getTemplateName().print(OS, getPrintingPolicy(), /*qualified*/ false); | |||
1123 | printTemplateArgumentList(OS, Ty->template_arguments(), getPrintingPolicy()); | |||
1124 | ||||
1125 | SourceLocation Loc = AliasDecl->getLocation(); | |||
1126 | return DBuilder.createTypedef(Src, OS.str(), getOrCreateFile(Loc), | |||
1127 | getLineNumber(Loc), | |||
1128 | getDeclContextDescriptor(AliasDecl)); | |||
1129 | } | |||
1130 | ||||
1131 | llvm::DIType *CGDebugInfo::CreateType(const TypedefType *Ty, | |||
1132 | llvm::DIFile *Unit) { | |||
1133 | llvm::DIType *Underlying = | |||
1134 | getOrCreateType(Ty->getDecl()->getUnderlyingType(), Unit); | |||
1135 | ||||
1136 | if (Ty->getDecl()->hasAttr<NoDebugAttr>()) | |||
1137 | return Underlying; | |||
1138 | ||||
1139 | // We don't set size information, but do specify where the typedef was | |||
1140 | // declared. | |||
1141 | SourceLocation Loc = Ty->getDecl()->getLocation(); | |||
1142 | ||||
1143 | // Typedefs are derived from some other type. | |||
1144 | return DBuilder.createTypedef(Underlying, Ty->getDecl()->getName(), | |||
1145 | getOrCreateFile(Loc), getLineNumber(Loc), | |||
1146 | getDeclContextDescriptor(Ty->getDecl())); | |||
1147 | } | |||
1148 | ||||
1149 | static unsigned getDwarfCC(CallingConv CC) { | |||
1150 | switch (CC) { | |||
1151 | case CC_C: | |||
1152 | // Avoid emitting DW_AT_calling_convention if the C convention was used. | |||
1153 | return 0; | |||
1154 | ||||
1155 | case CC_X86StdCall: | |||
1156 | return llvm::dwarf::DW_CC_BORLAND_stdcall; | |||
1157 | case CC_X86FastCall: | |||
1158 | return llvm::dwarf::DW_CC_BORLAND_msfastcall; | |||
1159 | case CC_X86ThisCall: | |||
1160 | return llvm::dwarf::DW_CC_BORLAND_thiscall; | |||
1161 | case CC_X86VectorCall: | |||
1162 | return llvm::dwarf::DW_CC_LLVM_vectorcall; | |||
1163 | case CC_X86Pascal: | |||
1164 | return llvm::dwarf::DW_CC_BORLAND_pascal; | |||
1165 | case CC_Win64: | |||
1166 | return llvm::dwarf::DW_CC_LLVM_Win64; | |||
1167 | case CC_X86_64SysV: | |||
1168 | return llvm::dwarf::DW_CC_LLVM_X86_64SysV; | |||
1169 | case CC_AAPCS: | |||
1170 | case CC_AArch64VectorCall: | |||
1171 | return llvm::dwarf::DW_CC_LLVM_AAPCS; | |||
1172 | case CC_AAPCS_VFP: | |||
1173 | return llvm::dwarf::DW_CC_LLVM_AAPCS_VFP; | |||
1174 | case CC_IntelOclBicc: | |||
1175 | return llvm::dwarf::DW_CC_LLVM_IntelOclBicc; | |||
1176 | case CC_SpirFunction: | |||
1177 | return llvm::dwarf::DW_CC_LLVM_SpirFunction; | |||
1178 | case CC_OpenCLKernel: | |||
1179 | return llvm::dwarf::DW_CC_LLVM_OpenCLKernel; | |||
1180 | case CC_Swift: | |||
1181 | return llvm::dwarf::DW_CC_LLVM_Swift; | |||
1182 | case CC_PreserveMost: | |||
1183 | return llvm::dwarf::DW_CC_LLVM_PreserveMost; | |||
1184 | case CC_PreserveAll: | |||
1185 | return llvm::dwarf::DW_CC_LLVM_PreserveAll; | |||
1186 | case CC_X86RegCall: | |||
1187 | return llvm::dwarf::DW_CC_LLVM_X86RegCall; | |||
1188 | } | |||
1189 | return 0; | |||
1190 | } | |||
1191 | ||||
1192 | llvm::DIType *CGDebugInfo::CreateType(const FunctionType *Ty, | |||
1193 | llvm::DIFile *Unit) { | |||
1194 | SmallVector<llvm::Metadata *, 16> EltTys; | |||
1195 | ||||
1196 | // Add the result type at least. | |||
1197 | EltTys.push_back(getOrCreateType(Ty->getReturnType(), Unit)); | |||
1198 | ||||
1199 | // Set up remainder of arguments if there is a prototype. | |||
1200 | // otherwise emit it as a variadic function. | |||
1201 | if (isa<FunctionNoProtoType>(Ty)) | |||
1202 | EltTys.push_back(DBuilder.createUnspecifiedParameter()); | |||
1203 | else if (const auto *FPT = dyn_cast<FunctionProtoType>(Ty)) { | |||
1204 | for (const QualType &ParamType : FPT->param_types()) | |||
1205 | EltTys.push_back(getOrCreateType(ParamType, Unit)); | |||
1206 | if (FPT->isVariadic()) | |||
1207 | EltTys.push_back(DBuilder.createUnspecifiedParameter()); | |||
1208 | } | |||
1209 | ||||
1210 | llvm::DITypeRefArray EltTypeArray = DBuilder.getOrCreateTypeArray(EltTys); | |||
1211 | return DBuilder.createSubroutineType(EltTypeArray, llvm::DINode::FlagZero, | |||
1212 | getDwarfCC(Ty->getCallConv())); | |||
1213 | } | |||
1214 | ||||
1215 | /// Convert an AccessSpecifier into the corresponding DINode flag. | |||
1216 | /// As an optimization, return 0 if the access specifier equals the | |||
1217 | /// default for the containing type. | |||
1218 | static llvm::DINode::DIFlags getAccessFlag(AccessSpecifier Access, | |||
1219 | const RecordDecl *RD) { | |||
1220 | AccessSpecifier Default = clang::AS_none; | |||
1221 | if (RD && RD->isClass()) | |||
1222 | Default = clang::AS_private; | |||
1223 | else if (RD && (RD->isStruct() || RD->isUnion())) | |||
1224 | Default = clang::AS_public; | |||
1225 | ||||
1226 | if (Access == Default) | |||
1227 | return llvm::DINode::FlagZero; | |||
1228 | ||||
1229 | switch (Access) { | |||
1230 | case clang::AS_private: | |||
1231 | return llvm::DINode::FlagPrivate; | |||
1232 | case clang::AS_protected: | |||
1233 | return llvm::DINode::FlagProtected; | |||
1234 | case clang::AS_public: | |||
1235 | return llvm::DINode::FlagPublic; | |||
1236 | case clang::AS_none: | |||
1237 | return llvm::DINode::FlagZero; | |||
1238 | } | |||
1239 | llvm_unreachable("unexpected access enumerator")::llvm::llvm_unreachable_internal("unexpected access enumerator" , "/build/llvm-toolchain-snapshot-10~svn374877/tools/clang/lib/CodeGen/CGDebugInfo.cpp" , 1239); | |||
1240 | } | |||
1241 | ||||
1242 | llvm::DIType *CGDebugInfo::createBitFieldType(const FieldDecl *BitFieldDecl, | |||
1243 | llvm::DIScope *RecordTy, | |||
1244 | const RecordDecl *RD) { | |||
1245 | StringRef Name = BitFieldDecl->getName(); | |||
1246 | QualType Ty = BitFieldDecl->getType(); | |||
1247 | SourceLocation Loc = BitFieldDecl->getLocation(); | |||
1248 | llvm::DIFile *VUnit = getOrCreateFile(Loc); | |||
1249 | llvm::DIType *DebugType = getOrCreateType(Ty, VUnit); | |||
1250 | ||||
1251 | // Get the location for the field. | |||
1252 | llvm::DIFile *File = getOrCreateFile(Loc); | |||
1253 | unsigned Line = getLineNumber(Loc); | |||
1254 | ||||
1255 | const CGBitFieldInfo &BitFieldInfo = | |||
1256 | CGM.getTypes().getCGRecordLayout(RD).getBitFieldInfo(BitFieldDecl); | |||
1257 | uint64_t SizeInBits = BitFieldInfo.Size; | |||
1258 | 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-10~svn374877/tools/clang/lib/CodeGen/CGDebugInfo.cpp" , 1258, __PRETTY_FUNCTION__)); | |||
1259 | uint64_t StorageOffsetInBits = | |||
1260 | CGM.getContext().toBits(BitFieldInfo.StorageOffset); | |||
1261 | uint64_t Offset = BitFieldInfo.Offset; | |||
1262 | // The bit offsets for big endian machines are reversed for big | |||
1263 | // endian target, compensate for that as the DIDerivedType requires | |||
1264 | // un-reversed offsets. | |||
1265 | if (CGM.getDataLayout().isBigEndian()) | |||
1266 | Offset = BitFieldInfo.StorageSize - BitFieldInfo.Size - Offset; | |||
1267 | uint64_t OffsetInBits = StorageOffsetInBits + Offset; | |||
1268 | llvm::DINode::DIFlags Flags = getAccessFlag(BitFieldDecl->getAccess(), RD); | |||
1269 | return DBuilder.createBitFieldMemberType( | |||
1270 | RecordTy, Name, File, Line, SizeInBits, OffsetInBits, StorageOffsetInBits, | |||
1271 | Flags, DebugType); | |||
1272 | } | |||
1273 | ||||
1274 | llvm::DIType * | |||
1275 | CGDebugInfo::createFieldType(StringRef name, QualType type, SourceLocation loc, | |||
1276 | AccessSpecifier AS, uint64_t offsetInBits, | |||
1277 | uint32_t AlignInBits, llvm::DIFile *tunit, | |||
1278 | llvm::DIScope *scope, const RecordDecl *RD) { | |||
1279 | llvm::DIType *debugType = getOrCreateType(type, tunit); | |||
1280 | ||||
1281 | // Get the location for the field. | |||
1282 | llvm::DIFile *file = getOrCreateFile(loc); | |||
1283 | unsigned line = getLineNumber(loc); | |||
1284 | ||||
1285 | uint64_t SizeInBits = 0; | |||
1286 | auto Align = AlignInBits; | |||
1287 | if (!type->isIncompleteArrayType()) { | |||
1288 | TypeInfo TI = CGM.getContext().getTypeInfo(type); | |||
1289 | SizeInBits = TI.Width; | |||
1290 | if (!Align) | |||
1291 | Align = getTypeAlignIfRequired(type, CGM.getContext()); | |||
1292 | } | |||
1293 | ||||
1294 | llvm::DINode::DIFlags flags = getAccessFlag(AS, RD); | |||
1295 | return DBuilder.createMemberType(scope, name, file, line, SizeInBits, Align, | |||
1296 | offsetInBits, flags, debugType); | |||
1297 | } | |||
1298 | ||||
1299 | void CGDebugInfo::CollectRecordLambdaFields( | |||
1300 | const CXXRecordDecl *CXXDecl, SmallVectorImpl<llvm::Metadata *> &elements, | |||
1301 | llvm::DIType *RecordTy) { | |||
1302 | // For C++11 Lambdas a Field will be the same as a Capture, but the Capture | |||
1303 | // has the name and the location of the variable so we should iterate over | |||
1304 | // both concurrently. | |||
1305 | const ASTRecordLayout &layout = CGM.getContext().getASTRecordLayout(CXXDecl); | |||
1306 | RecordDecl::field_iterator Field = CXXDecl->field_begin(); | |||
1307 | unsigned fieldno = 0; | |||
1308 | for (CXXRecordDecl::capture_const_iterator I = CXXDecl->captures_begin(), | |||
1309 | E = CXXDecl->captures_end(); | |||
1310 | I != E; ++I, ++Field, ++fieldno) { | |||
1311 | const LambdaCapture &C = *I; | |||
1312 | if (C.capturesVariable()) { | |||
1313 | SourceLocation Loc = C.getLocation(); | |||
1314 | 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-10~svn374877/tools/clang/lib/CodeGen/CGDebugInfo.cpp" , 1314, __PRETTY_FUNCTION__)); | |||
1315 | VarDecl *V = C.getCapturedVar(); | |||
1316 | StringRef VName = V->getName(); | |||
1317 | llvm::DIFile *VUnit = getOrCreateFile(Loc); | |||
1318 | auto Align = getDeclAlignIfRequired(V, CGM.getContext()); | |||
1319 | llvm::DIType *FieldType = createFieldType( | |||
1320 | VName, Field->getType(), Loc, Field->getAccess(), | |||
1321 | layout.getFieldOffset(fieldno), Align, VUnit, RecordTy, CXXDecl); | |||
1322 | elements.push_back(FieldType); | |||
1323 | } else if (C.capturesThis()) { | |||
1324 | // TODO: Need to handle 'this' in some way by probably renaming the | |||
1325 | // this of the lambda class and having a field member of 'this' or | |||
1326 | // by using AT_object_pointer for the function and having that be | |||
1327 | // used as 'this' for semantic references. | |||
1328 | FieldDecl *f = *Field; | |||
1329 | llvm::DIFile *VUnit = getOrCreateFile(f->getLocation()); | |||
1330 | QualType type = f->getType(); | |||
1331 | llvm::DIType *fieldType = createFieldType( | |||
1332 | "this", type, f->getLocation(), f->getAccess(), | |||
1333 | layout.getFieldOffset(fieldno), VUnit, RecordTy, CXXDecl); | |||
1334 | ||||
1335 | elements.push_back(fieldType); | |||
1336 | } | |||
1337 | } | |||
1338 | } | |||
1339 | ||||
1340 | llvm::DIDerivedType * | |||
1341 | CGDebugInfo::CreateRecordStaticField(const VarDecl *Var, llvm::DIType *RecordTy, | |||
1342 | const RecordDecl *RD) { | |||
1343 | // Create the descriptor for the static variable, with or without | |||
1344 | // constant initializers. | |||
1345 | Var = Var->getCanonicalDecl(); | |||
1346 | llvm::DIFile *VUnit = getOrCreateFile(Var->getLocation()); | |||
1347 | llvm::DIType *VTy = getOrCreateType(Var->getType(), VUnit); | |||
1348 | ||||
1349 | unsigned LineNumber = getLineNumber(Var->getLocation()); | |||
1350 | StringRef VName = Var->getName(); | |||
1351 | llvm::Constant *C = nullptr; | |||
1352 | if (Var->getInit()) { | |||
1353 | const APValue *Value = Var->evaluateValue(); | |||
1354 | if (Value) { | |||
1355 | if (Value->isInt()) | |||
1356 | C = llvm::ConstantInt::get(CGM.getLLVMContext(), Value->getInt()); | |||
1357 | if (Value->isFloat()) | |||
1358 | C = llvm::ConstantFP::get(CGM.getLLVMContext(), Value->getFloat()); | |||
1359 | } | |||
1360 | } | |||
1361 | ||||
1362 | llvm::DINode::DIFlags Flags = getAccessFlag(Var->getAccess(), RD); | |||
1363 | auto Align = getDeclAlignIfRequired(Var, CGM.getContext()); | |||
1364 | llvm::DIDerivedType *GV = DBuilder.createStaticMemberType( | |||
1365 | RecordTy, VName, VUnit, LineNumber, VTy, Flags, C, Align); | |||
1366 | StaticDataMemberCache[Var->getCanonicalDecl()].reset(GV); | |||
1367 | return GV; | |||
1368 | } | |||
1369 | ||||
1370 | void CGDebugInfo::CollectRecordNormalField( | |||
1371 | const FieldDecl *field, uint64_t OffsetInBits, llvm::DIFile *tunit, | |||
1372 | SmallVectorImpl<llvm::Metadata *> &elements, llvm::DIType *RecordTy, | |||
1373 | const RecordDecl *RD) { | |||
1374 | StringRef name = field->getName(); | |||
1375 | QualType type = field->getType(); | |||
1376 | ||||
1377 | // Ignore unnamed fields unless they're anonymous structs/unions. | |||
1378 | if (name.empty() && !type->isRecordType()) | |||
1379 | return; | |||
1380 | ||||
1381 | llvm::DIType *FieldType; | |||
1382 | if (field->isBitField()) { | |||
1383 | FieldType = createBitFieldType(field, RecordTy, RD); | |||
1384 | } else { | |||
1385 | auto Align = getDeclAlignIfRequired(field, CGM.getContext()); | |||
1386 | FieldType = | |||
1387 | createFieldType(name, type, field->getLocation(), field->getAccess(), | |||
1388 | OffsetInBits, Align, tunit, RecordTy, RD); | |||
1389 | } | |||
1390 | ||||
1391 | elements.push_back(FieldType); | |||
1392 | } | |||
1393 | ||||
1394 | void CGDebugInfo::CollectRecordNestedType( | |||
1395 | const TypeDecl *TD, SmallVectorImpl<llvm::Metadata *> &elements) { | |||
1396 | QualType Ty = CGM.getContext().getTypeDeclType(TD); | |||
1397 | // Injected class names are not considered nested records. | |||
1398 | if (isa<InjectedClassNameType>(Ty)) | |||
1399 | return; | |||
1400 | SourceLocation Loc = TD->getLocation(); | |||
1401 | llvm::DIType *nestedType = getOrCreateType(Ty, getOrCreateFile(Loc)); | |||
1402 | elements.push_back(nestedType); | |||
1403 | } | |||
1404 | ||||
1405 | void CGDebugInfo::CollectRecordFields( | |||
1406 | const RecordDecl *record, llvm::DIFile *tunit, | |||
1407 | SmallVectorImpl<llvm::Metadata *> &elements, | |||
1408 | llvm::DICompositeType *RecordTy) { | |||
1409 | const auto *CXXDecl = dyn_cast<CXXRecordDecl>(record); | |||
1410 | ||||
1411 | if (CXXDecl && CXXDecl->isLambda()) | |||
1412 | CollectRecordLambdaFields(CXXDecl, elements, RecordTy); | |||
1413 | else { | |||
1414 | const ASTRecordLayout &layout = CGM.getContext().getASTRecordLayout(record); | |||
1415 | ||||
1416 | // Field number for non-static fields. | |||
1417 | unsigned fieldNo = 0; | |||
1418 | ||||
1419 | // Static and non-static members should appear in the same order as | |||
1420 | // the corresponding declarations in the source program. | |||
1421 | for (const auto *I : record->decls()) | |||
1422 | if (const auto *V = dyn_cast<VarDecl>(I)) { | |||
1423 | if (V->hasAttr<NoDebugAttr>()) | |||
1424 | continue; | |||
1425 | ||||
1426 | // Skip variable template specializations when emitting CodeView. MSVC | |||
1427 | // doesn't emit them. | |||
1428 | if (CGM.getCodeGenOpts().EmitCodeView && | |||
1429 | isa<VarTemplateSpecializationDecl>(V)) | |||
1430 | continue; | |||
1431 | ||||
1432 | if (isa<VarTemplatePartialSpecializationDecl>(V)) | |||
1433 | continue; | |||
1434 | ||||
1435 | // Reuse the existing static member declaration if one exists | |||
1436 | auto MI = StaticDataMemberCache.find(V->getCanonicalDecl()); | |||
1437 | if (MI != StaticDataMemberCache.end()) { | |||
1438 | 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-10~svn374877/tools/clang/lib/CodeGen/CGDebugInfo.cpp" , 1439, __PRETTY_FUNCTION__)) | |||
1439 | "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-10~svn374877/tools/clang/lib/CodeGen/CGDebugInfo.cpp" , 1439, __PRETTY_FUNCTION__)); | |||
1440 | elements.push_back(MI->second); | |||
1441 | } else { | |||
1442 | auto Field = CreateRecordStaticField(V, RecordTy, record); | |||
1443 | elements.push_back(Field); | |||
1444 | } | |||
1445 | } else if (const auto *field = dyn_cast<FieldDecl>(I)) { | |||
1446 | CollectRecordNormalField(field, layout.getFieldOffset(fieldNo), tunit, | |||
1447 | elements, RecordTy, record); | |||
1448 | ||||
1449 | // Bump field number for next field. | |||
1450 | ++fieldNo; | |||
1451 | } else if (CGM.getCodeGenOpts().EmitCodeView) { | |||
1452 | // Debug info for nested types is included in the member list only for | |||
1453 | // CodeView. | |||
1454 | if (const auto *nestedType = dyn_cast<TypeDecl>(I)) | |||
1455 | if (!nestedType->isImplicit() && | |||
1456 | nestedType->getDeclContext() == record) | |||
1457 | CollectRecordNestedType(nestedType, elements); | |||
1458 | } | |||
1459 | } | |||
1460 | } | |||
1461 | ||||
1462 | llvm::DISubroutineType * | |||
1463 | CGDebugInfo::getOrCreateMethodType(const CXXMethodDecl *Method, | |||
1464 | llvm::DIFile *Unit) { | |||
1465 | const FunctionProtoType *Func = Method->getType()->getAs<FunctionProtoType>(); | |||
1466 | if (Method->isStatic()) | |||
1467 | return cast_or_null<llvm::DISubroutineType>( | |||
1468 | getOrCreateType(QualType(Func, 0), Unit)); | |||
1469 | return getOrCreateInstanceMethodType(Method->getThisType(), Func, Unit); | |||
1470 | } | |||
1471 | ||||
1472 | llvm::DISubroutineType *CGDebugInfo::getOrCreateInstanceMethodType( | |||
1473 | QualType ThisPtr, const FunctionProtoType *Func, llvm::DIFile *Unit) { | |||
1474 | // Add "this" pointer. | |||
1475 | llvm::DITypeRefArray Args( | |||
1476 | cast<llvm::DISubroutineType>(getOrCreateType(QualType(Func, 0), Unit)) | |||
1477 | ->getTypeArray()); | |||
1478 | 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-10~svn374877/tools/clang/lib/CodeGen/CGDebugInfo.cpp" , 1478, __PRETTY_FUNCTION__)); | |||
1479 | ||||
1480 | SmallVector<llvm::Metadata *, 16> Elts; | |||
1481 | ||||
1482 | // First element is always return type. For 'void' functions it is NULL. | |||
1483 | Elts.push_back(Args[0]); | |||
1484 | ||||
1485 | // "this" pointer is always first argument. | |||
1486 | const CXXRecordDecl *RD = ThisPtr->getPointeeCXXRecordDecl(); | |||
1487 | if (isa<ClassTemplateSpecializationDecl>(RD)) { | |||
1488 | // Create pointer type directly in this case. | |||
1489 | const PointerType *ThisPtrTy = cast<PointerType>(ThisPtr); | |||
1490 | QualType PointeeTy = ThisPtrTy->getPointeeType(); | |||
1491 | unsigned AS = CGM.getContext().getTargetAddressSpace(PointeeTy); | |||
1492 | uint64_t Size = CGM.getTarget().getPointerWidth(AS); | |||
1493 | auto Align = getTypeAlignIfRequired(ThisPtrTy, CGM.getContext()); | |||
1494 | llvm::DIType *PointeeType = getOrCreateType(PointeeTy, Unit); | |||
1495 | llvm::DIType *ThisPtrType = | |||
1496 | DBuilder.createPointerType(PointeeType, Size, Align); | |||
1497 | TypeCache[ThisPtr.getAsOpaquePtr()].reset(ThisPtrType); | |||
1498 | // TODO: This and the artificial type below are misleading, the | |||
1499 | // types aren't artificial the argument is, but the current | |||
1500 | // metadata doesn't represent that. | |||
1501 | ThisPtrType = DBuilder.createObjectPointerType(ThisPtrType); | |||
1502 | Elts.push_back(ThisPtrType); | |||
1503 | } else { | |||
1504 | llvm::DIType *ThisPtrType = getOrCreateType(ThisPtr, Unit); | |||
1505 | TypeCache[ThisPtr.getAsOpaquePtr()].reset(ThisPtrType); | |||
1506 | ThisPtrType = DBuilder.createObjectPointerType(ThisPtrType); | |||
1507 | Elts.push_back(ThisPtrType); | |||
1508 | } | |||
1509 | ||||
1510 | // Copy rest of the arguments. | |||
1511 | for (unsigned i = 1, e = Args.size(); i != e; ++i) | |||
1512 | Elts.push_back(Args[i]); | |||
1513 | ||||
1514 | llvm::DITypeRefArray EltTypeArray = DBuilder.getOrCreateTypeArray(Elts); | |||
1515 | ||||
1516 | llvm::DINode::DIFlags Flags = llvm::DINode::FlagZero; | |||
1517 | if (Func->getExtProtoInfo().RefQualifier == RQ_LValue) | |||
1518 | Flags |= llvm::DINode::FlagLValueReference; | |||
1519 | if (Func->getExtProtoInfo().RefQualifier == RQ_RValue) | |||
1520 | Flags |= llvm::DINode::FlagRValueReference; | |||
1521 | ||||
1522 | return DBuilder.createSubroutineType(EltTypeArray, Flags, | |||
1523 | getDwarfCC(Func->getCallConv())); | |||
1524 | } | |||
1525 | ||||
1526 | /// isFunctionLocalClass - Return true if CXXRecordDecl is defined | |||
1527 | /// inside a function. | |||
1528 | static bool isFunctionLocalClass(const CXXRecordDecl *RD) { | |||
1529 | if (const auto *NRD = dyn_cast<CXXRecordDecl>(RD->getDeclContext())) | |||
1530 | return isFunctionLocalClass(NRD); | |||
1531 | if (isa<FunctionDecl>(RD->getDeclContext())) | |||
1532 | return true; | |||
1533 | return false; | |||
1534 | } | |||
1535 | ||||
1536 | llvm::DISubprogram *CGDebugInfo::CreateCXXMemberFunction( | |||
1537 | const CXXMethodDecl *Method, llvm::DIFile *Unit, llvm::DIType *RecordTy) { | |||
1538 | bool IsCtorOrDtor = | |||
1539 | isa<CXXConstructorDecl>(Method) || isa<CXXDestructorDecl>(Method); | |||
1540 | ||||
1541 | StringRef MethodName = getFunctionName(Method); | |||
1542 | llvm::DISubroutineType *MethodTy = getOrCreateMethodType(Method, Unit); | |||
1543 | ||||
1544 | // Since a single ctor/dtor corresponds to multiple functions, it doesn't | |||
1545 | // make sense to give a single ctor/dtor a linkage name. | |||
1546 | StringRef MethodLinkageName; | |||
1547 | // FIXME: 'isFunctionLocalClass' seems like an arbitrary/unintentional | |||
1548 | // property to use here. It may've been intended to model "is non-external | |||
1549 | // type" but misses cases of non-function-local but non-external classes such | |||
1550 | // as those in anonymous namespaces as well as the reverse - external types | |||
1551 | // that are function local, such as those in (non-local) inline functions. | |||
1552 | if (!IsCtorOrDtor && !isFunctionLocalClass(Method->getParent())) | |||
1553 | MethodLinkageName = CGM.getMangledName(Method); | |||
1554 | ||||
1555 | // Get the location for the method. | |||
1556 | llvm::DIFile *MethodDefUnit = nullptr; | |||
1557 | unsigned MethodLine = 0; | |||
1558 | if (!Method->isImplicit()) { | |||
1559 | MethodDefUnit = getOrCreateFile(Method->getLocation()); | |||
1560 | MethodLine = getLineNumber(Method->getLocation()); | |||
1561 | } | |||
1562 | ||||
1563 | // Collect virtual method info. | |||
1564 | llvm::DIType *ContainingType = nullptr; | |||
1565 | unsigned VIndex = 0; | |||
1566 | llvm::DINode::DIFlags Flags = llvm::DINode::FlagZero; | |||
1567 | llvm::DISubprogram::DISPFlags SPFlags = llvm::DISubprogram::SPFlagZero; | |||
1568 | int ThisAdjustment = 0; | |||
1569 | ||||
1570 | if (Method->isVirtual()) { | |||
1571 | if (Method->isPure()) | |||
1572 | SPFlags |= llvm::DISubprogram::SPFlagPureVirtual; | |||
1573 | else | |||
1574 | SPFlags |= llvm::DISubprogram::SPFlagVirtual; | |||
1575 | ||||
1576 | if (CGM.getTarget().getCXXABI().isItaniumFamily()) { | |||
1577 | // It doesn't make sense to give a virtual destructor a vtable index, | |||
1578 | // since a single destructor has two entries in the vtable. | |||
1579 | if (!isa<CXXDestructorDecl>(Method)) | |||
1580 | VIndex = CGM.getItaniumVTableContext().getMethodVTableIndex(Method); | |||
1581 | } else { | |||
1582 | // Emit MS ABI vftable information. There is only one entry for the | |||
1583 | // deleting dtor. | |||
1584 | const auto *DD = dyn_cast<CXXDestructorDecl>(Method); | |||
1585 | GlobalDecl GD = DD ? GlobalDecl(DD, Dtor_Deleting) : GlobalDecl(Method); | |||
1586 | MethodVFTableLocation ML = | |||
1587 | CGM.getMicrosoftVTableContext().getMethodVFTableLocation(GD); | |||
1588 | VIndex = ML.Index; | |||
1589 | ||||
1590 | // CodeView only records the vftable offset in the class that introduces | |||
1591 | // the virtual method. This is possible because, unlike Itanium, the MS | |||
1592 | // C++ ABI does not include all virtual methods from non-primary bases in | |||
1593 | // the vtable for the most derived class. For example, if C inherits from | |||
1594 | // A and B, C's primary vftable will not include B's virtual methods. | |||
1595 | if (Method->size_overridden_methods() == 0) | |||
1596 | Flags |= llvm::DINode::FlagIntroducedVirtual; | |||
1597 | ||||
1598 | // The 'this' adjustment accounts for both the virtual and non-virtual | |||
1599 | // portions of the adjustment. Presumably the debugger only uses it when | |||
1600 | // it knows the dynamic type of an object. | |||
1601 | ThisAdjustment = CGM.getCXXABI() | |||
1602 | .getVirtualFunctionPrologueThisAdjustment(GD) | |||
1603 | .getQuantity(); | |||
1604 | } | |||
1605 | ContainingType = RecordTy; | |||
1606 | } | |||
1607 | ||||
1608 | if (Method->isStatic()) | |||
1609 | Flags |= llvm::DINode::FlagStaticMember; | |||
1610 | if (Method->isImplicit()) | |||
1611 | Flags |= llvm::DINode::FlagArtificial; | |||
1612 | Flags |= getAccessFlag(Method->getAccess(), Method->getParent()); | |||
1613 | if (const auto *CXXC = dyn_cast<CXXConstructorDecl>(Method)) { | |||
1614 | if (CXXC->isExplicit()) | |||
1615 | Flags |= llvm::DINode::FlagExplicit; | |||
1616 | } else if (const auto *CXXC = dyn_cast<CXXConversionDecl>(Method)) { | |||
1617 | if (CXXC->isExplicit()) | |||
1618 | Flags |= llvm::DINode::FlagExplicit; | |||
1619 | } | |||
1620 | if (Method->hasPrototype()) | |||
1621 | Flags |= llvm::DINode::FlagPrototyped; | |||
1622 | if (Method->getRefQualifier() == RQ_LValue) | |||
1623 | Flags |= llvm::DINode::FlagLValueReference; | |||
1624 | if (Method->getRefQualifier() == RQ_RValue) | |||
1625 | Flags |= llvm::DINode::FlagRValueReference; | |||
1626 | if (CGM.getLangOpts().Optimize) | |||
1627 | SPFlags |= llvm::DISubprogram::SPFlagOptimized; | |||
1628 | ||||
1629 | llvm::DINodeArray TParamsArray = CollectFunctionTemplateParams(Method, Unit); | |||
1630 | llvm::DISubprogram *SP = DBuilder.createMethod( | |||
1631 | RecordTy, MethodName, MethodLinkageName, MethodDefUnit, MethodLine, | |||
1632 | MethodTy, VIndex, ThisAdjustment, ContainingType, Flags, SPFlags, | |||
1633 | TParamsArray.get()); | |||
1634 | ||||
1635 | SPCache[Method->getCanonicalDecl()].reset(SP); | |||
1636 | ||||
1637 | return SP; | |||
1638 | } | |||
1639 | ||||
1640 | void CGDebugInfo::CollectCXXMemberFunctions( | |||
1641 | const CXXRecordDecl *RD, llvm::DIFile *Unit, | |||
1642 | SmallVectorImpl<llvm::Metadata *> &EltTys, llvm::DIType *RecordTy) { | |||
1643 | ||||
1644 | // Since we want more than just the individual member decls if we | |||
1645 | // have templated functions iterate over every declaration to gather | |||
1646 | // the functions. | |||
1647 | for (const auto *I : RD->decls()) { | |||
1648 | const auto *Method = dyn_cast<CXXMethodDecl>(I); | |||
1649 | // If the member is implicit, don't add it to the member list. This avoids | |||
1650 | // the member being added to type units by LLVM, while still allowing it | |||
1651 | // to be emitted into the type declaration/reference inside the compile | |||
1652 | // unit. | |||
1653 | // Ditto 'nodebug' methods, for consistency with CodeGenFunction.cpp. | |||
1654 | // FIXME: Handle Using(Shadow?)Decls here to create | |||
1655 | // DW_TAG_imported_declarations inside the class for base decls brought into | |||
1656 | // derived classes. GDB doesn't seem to notice/leverage these when I tried | |||
1657 | // it, so I'm not rushing to fix this. (GCC seems to produce them, if | |||
1658 | // referenced) | |||
1659 | if (!Method || Method->isImplicit() || Method->hasAttr<NoDebugAttr>()) | |||
1660 | continue; | |||
1661 | ||||
1662 | if (Method->getType()->castAs<FunctionProtoType>()->getContainedAutoType()) | |||
1663 | continue; | |||
1664 | ||||
1665 | // Reuse the existing member function declaration if it exists. | |||
1666 | // It may be associated with the declaration of the type & should be | |||
1667 | // reused as we're building the definition. | |||
1668 | // | |||
1669 | // This situation can arise in the vtable-based debug info reduction where | |||
1670 | // implicit members are emitted in a non-vtable TU. | |||
1671 | auto MI = SPCache.find(Method->getCanonicalDecl()); | |||
1672 | EltTys.push_back(MI == SPCache.end() | |||
1673 | ? CreateCXXMemberFunction(Method, Unit, RecordTy) | |||
1674 | : static_cast<llvm::Metadata *>(MI->second)); | |||
1675 | } | |||
1676 | } | |||
1677 | ||||
1678 | void CGDebugInfo::CollectCXXBases(const CXXRecordDecl *RD, llvm::DIFile *Unit, | |||
1679 | SmallVectorImpl<llvm::Metadata *> &EltTys, | |||
1680 | llvm::DIType *RecordTy) { | |||
1681 | llvm::DenseSet<CanonicalDeclPtr<const CXXRecordDecl>> SeenTypes; | |||
1682 | CollectCXXBasesAux(RD, Unit, EltTys, RecordTy, RD->bases(), SeenTypes, | |||
1683 | llvm::DINode::FlagZero); | |||
1684 | ||||
1685 | // If we are generating CodeView debug info, we also need to emit records for | |||
1686 | // indirect virtual base classes. | |||
1687 | if (CGM.getCodeGenOpts().EmitCodeView) { | |||
1688 | CollectCXXBasesAux(RD, Unit, EltTys, RecordTy, RD->vbases(), SeenTypes, | |||
1689 | llvm::DINode::FlagIndirectVirtualBase); | |||
1690 | } | |||
1691 | } | |||
1692 | ||||
1693 | void CGDebugInfo::CollectCXXBasesAux( | |||
1694 | const CXXRecordDecl *RD, llvm::DIFile *Unit, | |||
1695 | SmallVectorImpl<llvm::Metadata *> &EltTys, llvm::DIType *RecordTy, | |||
1696 | const CXXRecordDecl::base_class_const_range &Bases, | |||
1697 | llvm::DenseSet<CanonicalDeclPtr<const CXXRecordDecl>> &SeenTypes, | |||
1698 | llvm::DINode::DIFlags StartingFlags) { | |||
1699 | const ASTRecordLayout &RL = CGM.getContext().getASTRecordLayout(RD); | |||
1700 | for (const auto &BI : Bases) { | |||
1701 | const auto *Base = | |||
1702 | cast<CXXRecordDecl>(BI.getType()->castAs<RecordType>()->getDecl()); | |||
1703 | if (!SeenTypes.insert(Base).second) | |||
1704 | continue; | |||
1705 | auto *BaseTy = getOrCreateType(BI.getType(), Unit); | |||
1706 | llvm::DINode::DIFlags BFlags = StartingFlags; | |||
1707 | uint64_t BaseOffset; | |||
1708 | uint32_t VBPtrOffset = 0; | |||
1709 | ||||
1710 | if (BI.isVirtual()) { | |||
1711 | if (CGM.getTarget().getCXXABI().isItaniumFamily()) { | |||
1712 | // virtual base offset offset is -ve. The code generator emits dwarf | |||
1713 | // expression where it expects +ve number. | |||
1714 | BaseOffset = 0 - CGM.getItaniumVTableContext() | |||
1715 | .getVirtualBaseOffsetOffset(RD, Base) | |||
1716 | .getQuantity(); | |||
1717 | } else { | |||
1718 | // In the MS ABI, store the vbtable offset, which is analogous to the | |||
1719 | // vbase offset offset in Itanium. | |||
1720 | BaseOffset = | |||
1721 | 4 * CGM.getMicrosoftVTableContext().getVBTableIndex(RD, Base); | |||
1722 | VBPtrOffset = CGM.getContext() | |||
1723 | .getASTRecordLayout(RD) | |||
1724 | .getVBPtrOffset() | |||
1725 | .getQuantity(); | |||
1726 | } | |||
1727 | BFlags |= llvm::DINode::FlagVirtual; | |||
1728 | } else | |||
1729 | BaseOffset = CGM.getContext().toBits(RL.getBaseClassOffset(Base)); | |||
1730 | // FIXME: Inconsistent units for BaseOffset. It is in bytes when | |||
1731 | // BI->isVirtual() and bits when not. | |||
1732 | ||||
1733 | BFlags |= getAccessFlag(BI.getAccessSpecifier(), RD); | |||
1734 | llvm::DIType *DTy = DBuilder.createInheritance(RecordTy, BaseTy, BaseOffset, | |||
1735 | VBPtrOffset, BFlags); | |||
1736 | EltTys.push_back(DTy); | |||
1737 | } | |||
1738 | } | |||
1739 | ||||
1740 | llvm::DINodeArray | |||
1741 | CGDebugInfo::CollectTemplateParams(const TemplateParameterList *TPList, | |||
1742 | ArrayRef<TemplateArgument> TAList, | |||
1743 | llvm::DIFile *Unit) { | |||
1744 | SmallVector<llvm::Metadata *, 16> TemplateParams; | |||
1745 | for (unsigned i = 0, e = TAList.size(); i != e; ++i) { | |||
1746 | const TemplateArgument &TA = TAList[i]; | |||
1747 | StringRef Name; | |||
1748 | if (TPList) | |||
1749 | Name = TPList->getParam(i)->getName(); | |||
1750 | switch (TA.getKind()) { | |||
1751 | case TemplateArgument::Type: { | |||
1752 | llvm::DIType *TTy = getOrCreateType(TA.getAsType(), Unit); | |||
1753 | TemplateParams.push_back( | |||
1754 | DBuilder.createTemplateTypeParameter(TheCU, Name, TTy)); | |||
1755 | } break; | |||
1756 | case TemplateArgument::Integral: { | |||
1757 | llvm::DIType *TTy = getOrCreateType(TA.getIntegralType(), Unit); | |||
1758 | TemplateParams.push_back(DBuilder.createTemplateValueParameter( | |||
1759 | TheCU, Name, TTy, | |||
1760 | llvm::ConstantInt::get(CGM.getLLVMContext(), TA.getAsIntegral()))); | |||
1761 | } break; | |||
1762 | case TemplateArgument::Declaration: { | |||
1763 | const ValueDecl *D = TA.getAsDecl(); | |||
1764 | QualType T = TA.getParamTypeForDecl().getDesugaredType(CGM.getContext()); | |||
1765 | llvm::DIType *TTy = getOrCreateType(T, Unit); | |||
1766 | llvm::Constant *V = nullptr; | |||
1767 | // Skip retrieve the value if that template parameter has cuda device | |||
1768 | // attribute, i.e. that value is not available at the host side. | |||
1769 | if (!CGM.getLangOpts().CUDA || CGM.getLangOpts().CUDAIsDevice || | |||
1770 | !D->hasAttr<CUDADeviceAttr>()) { | |||
1771 | const CXXMethodDecl *MD; | |||
1772 | // Variable pointer template parameters have a value that is the address | |||
1773 | // of the variable. | |||
1774 | if (const auto *VD = dyn_cast<VarDecl>(D)) | |||
1775 | V = CGM.GetAddrOfGlobalVar(VD); | |||
1776 | // Member function pointers have special support for building them, | |||
1777 | // though this is currently unsupported in LLVM CodeGen. | |||
1778 | else if ((MD = dyn_cast<CXXMethodDecl>(D)) && MD->isInstance()) | |||
1779 | V = CGM.getCXXABI().EmitMemberFunctionPointer(MD); | |||
1780 | else if (const auto *FD = dyn_cast<FunctionDecl>(D)) | |||
1781 | V = CGM.GetAddrOfFunction(FD); | |||
1782 | // Member data pointers have special handling too to compute the fixed | |||
1783 | // offset within the object. | |||
1784 | else if (const auto *MPT = | |||
1785 | dyn_cast<MemberPointerType>(T.getTypePtr())) { | |||
1786 | // These five lines (& possibly the above member function pointer | |||
1787 | // handling) might be able to be refactored to use similar code in | |||
1788 | // CodeGenModule::getMemberPointerConstant | |||
1789 | uint64_t fieldOffset = CGM.getContext().getFieldOffset(D); | |||
1790 | CharUnits chars = | |||
1791 | CGM.getContext().toCharUnitsFromBits((int64_t)fieldOffset); | |||
1792 | V = CGM.getCXXABI().EmitMemberDataPointer(MPT, chars); | |||
1793 | } | |||
1794 | V = V->stripPointerCasts(); | |||
1795 | } | |||
1796 | TemplateParams.push_back(DBuilder.createTemplateValueParameter( | |||
1797 | TheCU, Name, TTy, cast_or_null<llvm::Constant>(V))); | |||
1798 | } break; | |||
1799 | case TemplateArgument::NullPtr: { | |||
1800 | QualType T = TA.getNullPtrType(); | |||
1801 | llvm::DIType *TTy = getOrCreateType(T, Unit); | |||
1802 | llvm::Constant *V = nullptr; | |||
1803 | // Special case member data pointer null values since they're actually -1 | |||
1804 | // instead of zero. | |||
1805 | if (const auto *MPT = dyn_cast<MemberPointerType>(T.getTypePtr())) | |||
1806 | // But treat member function pointers as simple zero integers because | |||
1807 | // it's easier than having a special case in LLVM's CodeGen. If LLVM | |||
1808 | // CodeGen grows handling for values of non-null member function | |||
1809 | // pointers then perhaps we could remove this special case and rely on | |||
1810 | // EmitNullMemberPointer for member function pointers. | |||
1811 | if (MPT->isMemberDataPointer()) | |||
1812 | V = CGM.getCXXABI().EmitNullMemberPointer(MPT); | |||
1813 | if (!V) | |||
1814 | V = llvm::ConstantInt::get(CGM.Int8Ty, 0); | |||
1815 | TemplateParams.push_back( | |||
1816 | DBuilder.createTemplateValueParameter(TheCU, Name, TTy, V)); | |||
1817 | } break; | |||
1818 | case TemplateArgument::Template: | |||
1819 | TemplateParams.push_back(DBuilder.createTemplateTemplateParameter( | |||
1820 | TheCU, Name, nullptr, | |||
1821 | TA.getAsTemplate().getAsTemplateDecl()->getQualifiedNameAsString())); | |||
1822 | break; | |||
1823 | case TemplateArgument::Pack: | |||
1824 | TemplateParams.push_back(DBuilder.createTemplateParameterPack( | |||
1825 | TheCU, Name, nullptr, | |||
1826 | CollectTemplateParams(nullptr, TA.getPackAsArray(), Unit))); | |||
1827 | break; | |||
1828 | case TemplateArgument::Expression: { | |||
1829 | const Expr *E = TA.getAsExpr(); | |||
1830 | QualType T = E->getType(); | |||
1831 | if (E->isGLValue()) | |||
1832 | T = CGM.getContext().getLValueReferenceType(T); | |||
1833 | llvm::Constant *V = ConstantEmitter(CGM).emitAbstract(E, T); | |||
1834 | 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-10~svn374877/tools/clang/lib/CodeGen/CGDebugInfo.cpp" , 1834, __PRETTY_FUNCTION__)); | |||
1835 | llvm::DIType *TTy = getOrCreateType(T, Unit); | |||
1836 | TemplateParams.push_back(DBuilder.createTemplateValueParameter( | |||
1837 | TheCU, Name, TTy, V->stripPointerCasts())); | |||
1838 | } break; | |||
1839 | // And the following should never occur: | |||
1840 | case TemplateArgument::TemplateExpansion: | |||
1841 | case TemplateArgument::Null: | |||
1842 | llvm_unreachable(::llvm::llvm_unreachable_internal("These argument types shouldn't exist in concrete types" , "/build/llvm-toolchain-snapshot-10~svn374877/tools/clang/lib/CodeGen/CGDebugInfo.cpp" , 1843) | |||
1843 | "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-10~svn374877/tools/clang/lib/CodeGen/CGDebugInfo.cpp" , 1843); | |||
1844 | } | |||
1845 | } | |||
1846 | return DBuilder.getOrCreateArray(TemplateParams); | |||
1847 | } | |||
1848 | ||||
1849 | llvm::DINodeArray | |||
1850 | CGDebugInfo::CollectFunctionTemplateParams(const FunctionDecl *FD, | |||
1851 | llvm::DIFile *Unit) { | |||
1852 | if (FD->getTemplatedKind() == | |||
1853 | FunctionDecl::TK_FunctionTemplateSpecialization) { | |||
1854 | const TemplateParameterList *TList = FD->getTemplateSpecializationInfo() | |||
1855 | ->getTemplate() | |||
1856 | ->getTemplateParameters(); | |||
1857 | return CollectTemplateParams( | |||
1858 | TList, FD->getTemplateSpecializationArgs()->asArray(), Unit); | |||
1859 | } | |||
1860 | return llvm::DINodeArray(); | |||
1861 | } | |||
1862 | ||||
1863 | llvm::DINodeArray CGDebugInfo::CollectVarTemplateParams(const VarDecl *VL, | |||
1864 | llvm::DIFile *Unit) { | |||
1865 | // Always get the full list of parameters, not just the ones from the | |||
1866 | // specialization. A partial specialization may have fewer parameters than | |||
1867 | // there are arguments. | |||
1868 | auto *TS = dyn_cast<VarTemplateSpecializationDecl>(VL); | |||
1869 | if (!TS) | |||
1870 | return llvm::DINodeArray(); | |||
1871 | VarTemplateDecl *T = TS->getSpecializedTemplate(); | |||
1872 | const TemplateParameterList *TList = T->getTemplateParameters(); | |||
1873 | auto TA = TS->getTemplateArgs().asArray(); | |||
1874 | return CollectTemplateParams(TList, TA, Unit); | |||
1875 | } | |||
1876 | ||||
1877 | llvm::DINodeArray CGDebugInfo::CollectCXXTemplateParams( | |||
1878 | const ClassTemplateSpecializationDecl *TSpecial, llvm::DIFile *Unit) { | |||
1879 | // Always get the full list of parameters, not just the ones from the | |||
1880 | // specialization. A partial specialization may have fewer parameters than | |||
1881 | // there are arguments. | |||
1882 | TemplateParameterList *TPList = | |||
1883 | TSpecial->getSpecializedTemplate()->getTemplateParameters(); | |||
1884 | const TemplateArgumentList &TAList = TSpecial->getTemplateArgs(); | |||
1885 | return CollectTemplateParams(TPList, TAList.asArray(), Unit); | |||
1886 | } | |||
1887 | ||||
1888 | llvm::DIType *CGDebugInfo::getOrCreateVTablePtrType(llvm::DIFile *Unit) { | |||
1889 | if (VTablePtrType) | |||
1890 | return VTablePtrType; | |||
1891 | ||||
1892 | ASTContext &Context = CGM.getContext(); | |||
1893 | ||||
1894 | /* Function type */ | |||
1895 | llvm::Metadata *STy = getOrCreateType(Context.IntTy, Unit); | |||
1896 | llvm::DITypeRefArray SElements = DBuilder.getOrCreateTypeArray(STy); | |||
1897 | llvm::DIType *SubTy = DBuilder.createSubroutineType(SElements); | |||
1898 | unsigned Size = Context.getTypeSize(Context.VoidPtrTy); | |||
1899 | unsigned VtblPtrAddressSpace = CGM.getTarget().getVtblPtrAddressSpace(); | |||
1900 | Optional<unsigned> DWARFAddressSpace = | |||
1901 | CGM.getTarget().getDWARFAddressSpace(VtblPtrAddressSpace); | |||
1902 | ||||
1903 | llvm::DIType *vtbl_ptr_type = DBuilder.createPointerType( | |||
1904 | SubTy, Size, 0, DWARFAddressSpace, "__vtbl_ptr_type"); | |||
1905 | VTablePtrType = DBuilder.createPointerType(vtbl_ptr_type, Size); | |||
1906 | return VTablePtrType; | |||
1907 | } | |||
1908 | ||||
1909 | StringRef CGDebugInfo::getVTableName(const CXXRecordDecl *RD) { | |||
1910 | // Copy the gdb compatible name on the side and use its reference. | |||
1911 | return internString("_vptr$", RD->getNameAsString()); | |||
1912 | } | |||
1913 | ||||
1914 | StringRef CGDebugInfo::getDynamicInitializerName(const VarDecl *VD, | |||
1915 | DynamicInitKind StubKind, | |||
1916 | llvm::Function *InitFn) { | |||
1917 | // If we're not emitting codeview, use the mangled name. For Itanium, this is | |||
1918 | // arbitrary. | |||
1919 | if (!CGM.getCodeGenOpts().EmitCodeView) | |||
1920 | return InitFn->getName(); | |||
1921 | ||||
1922 | // Print the normal qualified name for the variable, then break off the last | |||
1923 | // NNS, and add the appropriate other text. Clang always prints the global | |||
1924 | // variable name without template arguments, so we can use rsplit("::") and | |||
1925 | // then recombine the pieces. | |||
1926 | SmallString<128> QualifiedGV; | |||
1927 | StringRef Quals; | |||
1928 | StringRef GVName; | |||
1929 | { | |||
1930 | llvm::raw_svector_ostream OS(QualifiedGV); | |||
1931 | VD->printQualifiedName(OS, getPrintingPolicy()); | |||
1932 | std::tie(Quals, GVName) = OS.str().rsplit("::"); | |||
1933 | if (GVName.empty()) | |||
1934 | std::swap(Quals, GVName); | |||
1935 | } | |||
1936 | ||||
1937 | SmallString<128> InitName; | |||
1938 | llvm::raw_svector_ostream OS(InitName); | |||
1939 | if (!Quals.empty()) | |||
1940 | OS << Quals << "::"; | |||
1941 | ||||
1942 | switch (StubKind) { | |||
1943 | case DynamicInitKind::NoStub: | |||
1944 | llvm_unreachable("not an initializer")::llvm::llvm_unreachable_internal("not an initializer", "/build/llvm-toolchain-snapshot-10~svn374877/tools/clang/lib/CodeGen/CGDebugInfo.cpp" , 1944); | |||
1945 | case DynamicInitKind::Initializer: | |||
1946 | OS << "`dynamic initializer for '"; | |||
1947 | break; | |||
1948 | case DynamicInitKind::AtExit: | |||
1949 | OS << "`dynamic atexit destructor for '"; | |||
1950 | break; | |||
1951 | } | |||
1952 | ||||
1953 | OS << GVName; | |||
1954 | ||||
1955 | // Add any template specialization args. | |||
1956 | if (const auto *VTpl = dyn_cast<VarTemplateSpecializationDecl>(VD)) { | |||
1957 | printTemplateArgumentList(OS, VTpl->getTemplateArgs().asArray(), | |||
1958 | getPrintingPolicy()); | |||
1959 | } | |||
1960 | ||||
1961 | OS << '\''; | |||
1962 | ||||
1963 | return internString(OS.str()); | |||
1964 | } | |||
1965 | ||||
1966 | void CGDebugInfo::CollectVTableInfo(const CXXRecordDecl *RD, llvm::DIFile *Unit, | |||
1967 | SmallVectorImpl<llvm::Metadata *> &EltTys, | |||
1968 | llvm::DICompositeType *RecordTy) { | |||
1969 | // If this class is not dynamic then there is not any vtable info to collect. | |||
1970 | if (!RD->isDynamicClass()) | |||
1971 | return; | |||
1972 | ||||
1973 | // Don't emit any vtable shape or vptr info if this class doesn't have an | |||
1974 | // extendable vfptr. This can happen if the class doesn't have virtual | |||
1975 | // methods, or in the MS ABI if those virtual methods only come from virtually | |||
1976 | // inherited bases. | |||
1977 | const ASTRecordLayout &RL = CGM.getContext().getASTRecordLayout(RD); | |||
1978 | if (!RL.hasExtendableVFPtr()) | |||
1979 | return; | |||
1980 | ||||
1981 | // CodeView needs to know how large the vtable of every dynamic class is, so | |||
1982 | // emit a special named pointer type into the element list. The vptr type | |||
1983 | // points to this type as well. | |||
1984 | llvm::DIType *VPtrTy = nullptr; | |||
1985 | bool NeedVTableShape = CGM.getCodeGenOpts().EmitCodeView && | |||
1986 | CGM.getTarget().getCXXABI().isMicrosoft(); | |||
1987 | if (NeedVTableShape) { | |||
1988 | uint64_t PtrWidth = | |||
1989 | CGM.getContext().getTypeSize(CGM.getContext().VoidPtrTy); | |||
1990 | const VTableLayout &VFTLayout = | |||
1991 | CGM.getMicrosoftVTableContext().getVFTableLayout(RD, CharUnits::Zero()); | |||
1992 | unsigned VSlotCount = | |||
1993 | VFTLayout.vtable_components().size() - CGM.getLangOpts().RTTIData; | |||
1994 | unsigned VTableWidth = PtrWidth * VSlotCount; | |||
1995 | unsigned VtblPtrAddressSpace = CGM.getTarget().getVtblPtrAddressSpace(); | |||
1996 | Optional<unsigned> DWARFAddressSpace = | |||
1997 | CGM.getTarget().getDWARFAddressSpace(VtblPtrAddressSpace); | |||
1998 | ||||
1999 | // Create a very wide void* type and insert it directly in the element list. | |||
2000 | llvm::DIType *VTableType = DBuilder.createPointerType( | |||
2001 | nullptr, VTableWidth, 0, DWARFAddressSpace, "__vtbl_ptr_type"); | |||
2002 | EltTys.push_back(VTableType); | |||
2003 | ||||
2004 | // The vptr is a pointer to this special vtable type. | |||
2005 | VPtrTy = DBuilder.createPointerType(VTableType, PtrWidth); | |||
2006 | } | |||
2007 | ||||
2008 | // If there is a primary base then the artificial vptr member lives there. | |||
2009 | if (RL.getPrimaryBase()) | |||
2010 | return; | |||
2011 | ||||
2012 | if (!VPtrTy) | |||
2013 | VPtrTy = getOrCreateVTablePtrType(Unit); | |||
2014 | ||||
2015 | unsigned Size = CGM.getContext().getTypeSize(CGM.getContext().VoidPtrTy); | |||
2016 | llvm::DIType *VPtrMember = | |||
2017 | DBuilder.createMemberType(Unit, getVTableName(RD), Unit, 0, Size, 0, 0, | |||
2018 | llvm::DINode::FlagArtificial, VPtrTy); | |||
2019 | EltTys.push_back(VPtrMember); | |||
2020 | } | |||
2021 | ||||
2022 | llvm::DIType *CGDebugInfo::getOrCreateRecordType(QualType RTy, | |||
2023 | SourceLocation Loc) { | |||
2024 | assert(DebugKind >= codegenoptions::LimitedDebugInfo)((DebugKind >= codegenoptions::LimitedDebugInfo) ? static_cast <void> (0) : __assert_fail ("DebugKind >= codegenoptions::LimitedDebugInfo" , "/build/llvm-toolchain-snapshot-10~svn374877/tools/clang/lib/CodeGen/CGDebugInfo.cpp" , 2024, __PRETTY_FUNCTION__)); | |||
2025 | llvm::DIType *T = getOrCreateType(RTy, getOrCreateFile(Loc)); | |||
2026 | return T; | |||
2027 | } | |||
2028 | ||||
2029 | llvm::DIType *CGDebugInfo::getOrCreateInterfaceType(QualType D, | |||
2030 | SourceLocation Loc) { | |||
2031 | return getOrCreateStandaloneType(D, Loc); | |||
2032 | } | |||
2033 | ||||
2034 | llvm::DIType *CGDebugInfo::getOrCreateStandaloneType(QualType D, | |||
2035 | SourceLocation Loc) { | |||
2036 | assert(DebugKind >= codegenoptions::LimitedDebugInfo)((DebugKind >= codegenoptions::LimitedDebugInfo) ? static_cast <void> (0) : __assert_fail ("DebugKind >= codegenoptions::LimitedDebugInfo" , "/build/llvm-toolchain-snapshot-10~svn374877/tools/clang/lib/CodeGen/CGDebugInfo.cpp" , 2036, __PRETTY_FUNCTION__)); | |||
2037 | assert(!D.isNull() && "null type")((!D.isNull() && "null type") ? static_cast<void> (0) : __assert_fail ("!D.isNull() && \"null type\"", "/build/llvm-toolchain-snapshot-10~svn374877/tools/clang/lib/CodeGen/CGDebugInfo.cpp" , 2037, __PRETTY_FUNCTION__)); | |||
2038 | llvm::DIType *T = getOrCreateType(D, getOrCreateFile(Loc)); | |||
2039 | 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-10~svn374877/tools/clang/lib/CodeGen/CGDebugInfo.cpp" , 2039, __PRETTY_FUNCTION__)); | |||
2040 | ||||
2041 | RetainedTypes.push_back(D.getAsOpaquePtr()); | |||
2042 | return T; | |||
2043 | } | |||
2044 | ||||
2045 | void CGDebugInfo::addHeapAllocSiteMetadata(llvm::Instruction *CI, | |||
2046 | QualType D, | |||
2047 | SourceLocation Loc) { | |||
2048 | llvm::MDNode *node; | |||
2049 | if (D.getTypePtr()->isVoidPointerType()) { | |||
2050 | node = llvm::MDNode::get(CGM.getLLVMContext(), None); | |||
2051 | } else { | |||
2052 | QualType PointeeTy = D.getTypePtr()->getPointeeType(); | |||
2053 | node = getOrCreateType(PointeeTy, getOrCreateFile(Loc)); | |||
2054 | } | |||
2055 | ||||
2056 | CI->setMetadata("heapallocsite", node); | |||
2057 | } | |||
2058 | ||||
2059 | void CGDebugInfo::completeType(const EnumDecl *ED) { | |||
2060 | if (DebugKind <= codegenoptions::DebugLineTablesOnly) | |||
2061 | return; | |||
2062 | QualType Ty = CGM.getContext().getEnumType(ED); | |||
2063 | void *TyPtr = Ty.getAsOpaquePtr(); | |||
2064 | auto I = TypeCache.find(TyPtr); | |||
2065 | if (I == TypeCache.end() || !cast<llvm::DIType>(I->second)->isForwardDecl()) | |||
2066 | return; | |||
2067 | llvm::DIType *Res = CreateTypeDefinition(Ty->castAs<EnumType>()); | |||
2068 | assert(!Res->isForwardDecl())((!Res->isForwardDecl()) ? static_cast<void> (0) : __assert_fail ("!Res->isForwardDecl()", "/build/llvm-toolchain-snapshot-10~svn374877/tools/clang/lib/CodeGen/CGDebugInfo.cpp" , 2068, __PRETTY_FUNCTION__)); | |||
2069 | TypeCache[TyPtr].reset(Res); | |||
2070 | } | |||
2071 | ||||
2072 | void CGDebugInfo::completeType(const RecordDecl *RD) { | |||
2073 | if (DebugKind > codegenoptions::LimitedDebugInfo || | |||
2074 | !CGM.getLangOpts().CPlusPlus) | |||
2075 | completeRequiredType(RD); | |||
2076 | } | |||
2077 | ||||
2078 | /// Return true if the class or any of its methods are marked dllimport. | |||
2079 | static bool isClassOrMethodDLLImport(const CXXRecordDecl *RD) { | |||
2080 | if (RD->hasAttr<DLLImportAttr>()) | |||
2081 | return true; | |||
2082 | for (const CXXMethodDecl *MD : RD->methods()) | |||
2083 | if (MD->hasAttr<DLLImportAttr>()) | |||
2084 | return true; | |||
2085 | return false; | |||
2086 | } | |||
2087 | ||||
2088 | /// Does a type definition exist in an imported clang module? | |||
2089 | static bool isDefinedInClangModule(const RecordDecl *RD) { | |||
2090 | // Only definitions that where imported from an AST file come from a module. | |||
2091 | if (!RD || !RD->isFromASTFile()) | |||
2092 | return false; | |||
2093 | // Anonymous entities cannot be addressed. Treat them as not from module. | |||
2094 | if (!RD->isExternallyVisible() && RD->getName().empty()) | |||
2095 | return false; | |||
2096 | if (auto *CXXDecl = dyn_cast<CXXRecordDecl>(RD)) { | |||
2097 | if (!CXXDecl->isCompleteDefinition()) | |||
2098 | return false; | |||
2099 | // Check wether RD is a template. | |||
2100 | auto TemplateKind = CXXDecl->getTemplateSpecializationKind(); | |||
2101 | if (TemplateKind != TSK_Undeclared) { | |||
2102 | // Unfortunately getOwningModule() isn't accurate enough to find the | |||
2103 | // owning module of a ClassTemplateSpecializationDecl that is inside a | |||
2104 | // namespace spanning multiple modules. | |||
2105 | bool Explicit = false; | |||
2106 | if (auto *TD = dyn_cast<ClassTemplateSpecializationDecl>(CXXDecl)) | |||
2107 | Explicit = TD->isExplicitInstantiationOrSpecialization(); | |||
2108 | if (!Explicit && CXXDecl->getEnclosingNamespaceContext()) | |||
2109 | return false; | |||
2110 | // This is a template, check the origin of the first member. | |||
2111 | if (CXXDecl->field_begin() == CXXDecl->field_end()) | |||
2112 | return TemplateKind == TSK_ExplicitInstantiationDeclaration; | |||
2113 | if (!CXXDecl->field_begin()->isFromASTFile()) | |||
2114 | return false; | |||
2115 | } | |||
2116 | } | |||
2117 | return true; | |||
2118 | } | |||
2119 | ||||
2120 | void CGDebugInfo::completeClassData(const RecordDecl *RD) { | |||
2121 | if (auto *CXXRD = dyn_cast<CXXRecordDecl>(RD)) | |||
2122 | if (CXXRD->isDynamicClass() && | |||
2123 | CGM.getVTableLinkage(CXXRD) == | |||
2124 | llvm::GlobalValue::AvailableExternallyLinkage && | |||
2125 | !isClassOrMethodDLLImport(CXXRD)) | |||
2126 | return; | |||
2127 | ||||
2128 | if (DebugTypeExtRefs && isDefinedInClangModule(RD->getDefinition())) | |||
2129 | return; | |||
2130 | ||||
2131 | completeClass(RD); | |||
2132 | } | |||
2133 | ||||
2134 | void CGDebugInfo::completeClass(const RecordDecl *RD) { | |||
2135 | if (DebugKind <= codegenoptions::DebugLineTablesOnly) | |||
2136 | return; | |||
2137 | QualType Ty = CGM.getContext().getRecordType(RD); | |||
2138 | void *TyPtr = Ty.getAsOpaquePtr(); | |||
2139 | auto I = TypeCache.find(TyPtr); | |||
2140 | if (I != TypeCache.end() && !cast<llvm::DIType>(I->second)->isForwardDecl()) | |||
2141 | return; | |||
2142 | llvm::DIType *Res = CreateTypeDefinition(Ty->castAs<RecordType>()); | |||
2143 | assert(!Res->isForwardDecl())((!Res->isForwardDecl()) ? static_cast<void> (0) : __assert_fail ("!Res->isForwardDecl()", "/build/llvm-toolchain-snapshot-10~svn374877/tools/clang/lib/CodeGen/CGDebugInfo.cpp" , 2143, __PRETTY_FUNCTION__)); | |||
2144 | TypeCache[TyPtr].reset(Res); | |||
2145 | } | |||
2146 | ||||
2147 | static bool hasExplicitMemberDefinition(CXXRecordDecl::method_iterator I, | |||
2148 | CXXRecordDecl::method_iterator End) { | |||
2149 | for (CXXMethodDecl *MD : llvm::make_range(I, End)) | |||
2150 | if (FunctionDecl *Tmpl = MD->getInstantiatedFromMemberFunction()) | |||
2151 | if (!Tmpl->isImplicit() && Tmpl->isThisDeclarationADefinition() && | |||
2152 | !MD->getMemberSpecializationInfo()->isExplicitSpecialization()) | |||
2153 | return true; | |||
2154 | return false; | |||
2155 | } | |||
2156 | ||||
2157 | static bool shouldOmitDefinition(codegenoptions::DebugInfoKind DebugKind, | |||
2158 | bool DebugTypeExtRefs, const RecordDecl *RD, | |||
2159 | const LangOptions &LangOpts) { | |||
2160 | if (DebugTypeExtRefs && isDefinedInClangModule(RD->getDefinition())) | |||
2161 | return true; | |||
2162 | ||||
2163 | if (auto *ES = RD->getASTContext().getExternalSource()) | |||
2164 | if (ES->hasExternalDefinitions(RD) == ExternalASTSource::EK_Always) | |||
2165 | return true; | |||
2166 | ||||
2167 | if (DebugKind > codegenoptions::LimitedDebugInfo) | |||
2168 | return false; | |||
2169 | ||||
2170 | if (!LangOpts.CPlusPlus) | |||
2171 | return false; | |||
2172 | ||||
2173 | if (!RD->isCompleteDefinitionRequired()) | |||
2174 | return true; | |||
2175 | ||||
2176 | const auto *CXXDecl = dyn_cast<CXXRecordDecl>(RD); | |||
2177 | ||||
2178 | if (!CXXDecl) | |||
2179 | return false; | |||
2180 | ||||
2181 | // Only emit complete debug info for a dynamic class when its vtable is | |||
2182 | // emitted. However, Microsoft debuggers don't resolve type information | |||
2183 | // across DLL boundaries, so skip this optimization if the class or any of its | |||
2184 | // methods are marked dllimport. This isn't a complete solution, since objects | |||
2185 | // without any dllimport methods can be used in one DLL and constructed in | |||
2186 | // another, but it is the current behavior of LimitedDebugInfo. | |||
2187 | if (CXXDecl->hasDefinition() && CXXDecl->isDynamicClass() && | |||
2188 | !isClassOrMethodDLLImport(CXXDecl)) | |||
2189 | return true; | |||
2190 | ||||
2191 | TemplateSpecializationKind Spec = TSK_Undeclared; | |||
2192 | if (const auto *SD = dyn_cast<ClassTemplateSpecializationDecl>(RD)) | |||
2193 | Spec = SD->getSpecializationKind(); | |||
2194 | ||||
2195 | if (Spec == TSK_ExplicitInstantiationDeclaration && | |||
2196 | hasExplicitMemberDefinition(CXXDecl->method_begin(), | |||
2197 | CXXDecl->method_end())) | |||
2198 | return true; | |||
2199 | ||||
2200 | return false; | |||
2201 | } | |||
2202 | ||||
2203 | void CGDebugInfo::completeRequiredType(const RecordDecl *RD) { | |||
2204 | if (shouldOmitDefinition(DebugKind, DebugTypeExtRefs, RD, CGM.getLangOpts())) | |||
2205 | return; | |||
2206 | ||||
2207 | QualType Ty = CGM.getContext().getRecordType(RD); | |||
2208 | llvm::DIType *T = getTypeOrNull(Ty); | |||
2209 | if (T && T->isForwardDecl()) | |||
2210 | completeClassData(RD); | |||
2211 | } | |||
2212 | ||||
2213 | llvm::DIType *CGDebugInfo::CreateType(const RecordType *Ty) { | |||
2214 | RecordDecl *RD = Ty->getDecl(); | |||
2215 | llvm::DIType *T = cast_or_null<llvm::DIType>(getTypeOrNull(QualType(Ty, 0))); | |||
2216 | if (T || shouldOmitDefinition(DebugKind, DebugTypeExtRefs, RD, | |||
2217 | CGM.getLangOpts())) { | |||
2218 | if (!T) | |||
2219 | T = getOrCreateRecordFwdDecl(Ty, getDeclContextDescriptor(RD)); | |||
2220 | return T; | |||
2221 | } | |||
2222 | ||||
2223 | return CreateTypeDefinition(Ty); | |||
2224 | } | |||
2225 | ||||
2226 | llvm::DIType *CGDebugInfo::CreateTypeDefinition(const RecordType *Ty) { | |||
2227 | RecordDecl *RD = Ty->getDecl(); | |||
2228 | ||||
2229 | // Get overall information about the record type for the debug info. | |||
2230 | llvm::DIFile *DefUnit = getOrCreateFile(RD->getLocation()); | |||
2231 | ||||
2232 | // Records and classes and unions can all be recursive. To handle them, we | |||
2233 | // first generate a debug descriptor for the struct as a forward declaration. | |||
2234 | // Then (if it is a definition) we go through and get debug info for all of | |||
2235 | // its members. Finally, we create a descriptor for the complete type (which | |||
2236 | // may refer to the forward decl if the struct is recursive) and replace all | |||
2237 | // uses of the forward declaration with the final definition. | |||
2238 | llvm::DICompositeType *FwdDecl = getOrCreateLimitedType(Ty, DefUnit); | |||
2239 | ||||
2240 | const RecordDecl *D = RD->getDefinition(); | |||
2241 | if (!D || !D->isCompleteDefinition()) | |||
2242 | return FwdDecl; | |||
2243 | ||||
2244 | if (const auto *CXXDecl = dyn_cast<CXXRecordDecl>(RD)) | |||
2245 | CollectContainingType(CXXDecl, FwdDecl); | |||
2246 | ||||
2247 | // Push the struct on region stack. | |||
2248 | LexicalBlockStack.emplace_back(&*FwdDecl); | |||
2249 | RegionMap[Ty->getDecl()].reset(FwdDecl); | |||
2250 | ||||
2251 | // Convert all the elements. | |||
2252 | SmallVector<llvm::Metadata *, 16> EltTys; | |||
2253 | // what about nested types? | |||
2254 | ||||
2255 | // Note: The split of CXXDecl information here is intentional, the | |||
2256 | // gdb tests will depend on a certain ordering at printout. The debug | |||
2257 | // information offsets are still correct if we merge them all together | |||
2258 | // though. | |||
2259 | const auto *CXXDecl = dyn_cast<CXXRecordDecl>(RD); | |||
2260 | if (CXXDecl) { | |||
2261 | CollectCXXBases(CXXDecl, DefUnit, EltTys, FwdDecl); | |||
2262 | CollectVTableInfo(CXXDecl, DefUnit, EltTys, FwdDecl); | |||
2263 | } | |||
2264 | ||||
2265 | // Collect data fields (including static variables and any initializers). | |||
2266 | CollectRecordFields(RD, DefUnit, EltTys, FwdDecl); | |||
2267 | if (CXXDecl) | |||
2268 | CollectCXXMemberFunctions(CXXDecl, DefUnit, EltTys, FwdDecl); | |||
2269 | ||||
2270 | LexicalBlockStack.pop_back(); | |||
2271 | RegionMap.erase(Ty->getDecl()); | |||
2272 | ||||
2273 | llvm::DINodeArray Elements = DBuilder.getOrCreateArray(EltTys); | |||
2274 | DBuilder.replaceArrays(FwdDecl, Elements); | |||
2275 | ||||
2276 | if (FwdDecl->isTemporary()) | |||
2277 | FwdDecl = | |||
2278 | llvm::MDNode::replaceWithPermanent(llvm::TempDICompositeType(FwdDecl)); | |||
2279 | ||||
2280 | RegionMap[Ty->getDecl()].reset(FwdDecl); | |||
2281 | return FwdDecl; | |||
2282 | } | |||
2283 | ||||
2284 | llvm::DIType *CGDebugInfo::CreateType(const ObjCObjectType *Ty, | |||
2285 | llvm::DIFile *Unit) { | |||
2286 | // Ignore protocols. | |||
2287 | return getOrCreateType(Ty->getBaseType(), Unit); | |||
2288 | } | |||
2289 | ||||
2290 | llvm::DIType *CGDebugInfo::CreateType(const ObjCTypeParamType *Ty, | |||
2291 | llvm::DIFile *Unit) { | |||
2292 | // Ignore protocols. | |||
2293 | SourceLocation Loc = Ty->getDecl()->getLocation(); | |||
2294 | ||||
2295 | // Use Typedefs to represent ObjCTypeParamType. | |||
2296 | return DBuilder.createTypedef( | |||
2297 | getOrCreateType(Ty->getDecl()->getUnderlyingType(), Unit), | |||
2298 | Ty->getDecl()->getName(), getOrCreateFile(Loc), getLineNumber(Loc), | |||
2299 | getDeclContextDescriptor(Ty->getDecl())); | |||
2300 | } | |||
2301 | ||||
2302 | /// \return true if Getter has the default name for the property PD. | |||
2303 | static bool hasDefaultGetterName(const ObjCPropertyDecl *PD, | |||
2304 | const ObjCMethodDecl *Getter) { | |||
2305 | assert(PD)((PD) ? static_cast<void> (0) : __assert_fail ("PD", "/build/llvm-toolchain-snapshot-10~svn374877/tools/clang/lib/CodeGen/CGDebugInfo.cpp" , 2305, __PRETTY_FUNCTION__)); | |||
2306 | if (!Getter) | |||
2307 | return true; | |||
2308 | ||||
2309 | assert(Getter->getDeclName().isObjCZeroArgSelector())((Getter->getDeclName().isObjCZeroArgSelector()) ? static_cast <void> (0) : __assert_fail ("Getter->getDeclName().isObjCZeroArgSelector()" , "/build/llvm-toolchain-snapshot-10~svn374877/tools/clang/lib/CodeGen/CGDebugInfo.cpp" , 2309, __PRETTY_FUNCTION__)); | |||
2310 | return PD->getName() == | |||
2311 | Getter->getDeclName().getObjCSelector().getNameForSlot(0); | |||
2312 | } | |||
2313 | ||||
2314 | /// \return true if Setter has the default name for the property PD. | |||
2315 | static bool hasDefaultSetterName(const ObjCPropertyDecl *PD, | |||
2316 | const ObjCMethodDecl *Setter) { | |||
2317 | assert(PD)((PD) ? static_cast<void> (0) : __assert_fail ("PD", "/build/llvm-toolchain-snapshot-10~svn374877/tools/clang/lib/CodeGen/CGDebugInfo.cpp" , 2317, __PRETTY_FUNCTION__)); | |||
2318 | if (!Setter) | |||
2319 | return true; | |||
2320 | ||||
2321 | assert(Setter->getDeclName().isObjCOneArgSelector())((Setter->getDeclName().isObjCOneArgSelector()) ? static_cast <void> (0) : __assert_fail ("Setter->getDeclName().isObjCOneArgSelector()" , "/build/llvm-toolchain-snapshot-10~svn374877/tools/clang/lib/CodeGen/CGDebugInfo.cpp" , 2321, __PRETTY_FUNCTION__)); | |||
2322 | return SelectorTable::constructSetterName(PD->getName()) == | |||
2323 | Setter->getDeclName().getObjCSelector().getNameForSlot(0); | |||
2324 | } | |||
2325 | ||||
2326 | llvm::DIType *CGDebugInfo::CreateType(const ObjCInterfaceType *Ty, | |||
2327 | llvm::DIFile *Unit) { | |||
2328 | ObjCInterfaceDecl *ID = Ty->getDecl(); | |||
2329 | if (!ID) | |||
2330 | return nullptr; | |||
2331 | ||||
2332 | // Return a forward declaration if this type was imported from a clang module, | |||
2333 | // and this is not the compile unit with the implementation of the type (which | |||
2334 | // may contain hidden ivars). | |||
2335 | if (DebugTypeExtRefs && ID->isFromASTFile() && ID->getDefinition() && | |||
2336 | !ID->getImplementation()) | |||
2337 | return DBuilder.createForwardDecl(llvm::dwarf::DW_TAG_structure_type, | |||
2338 | ID->getName(), | |||
2339 | getDeclContextDescriptor(ID), Unit, 0); | |||
2340 | ||||
2341 | // Get overall information about the record type for the debug info. | |||
2342 | llvm::DIFile *DefUnit = getOrCreateFile(ID->getLocation()); | |||
2343 | unsigned Line = getLineNumber(ID->getLocation()); | |||
2344 | auto RuntimeLang = | |||
2345 | static_cast<llvm::dwarf::SourceLanguage>(TheCU->getSourceLanguage()); | |||
2346 | ||||
2347 | // If this is just a forward declaration return a special forward-declaration | |||
2348 | // debug type since we won't be able to lay out the entire type. | |||
2349 | ObjCInterfaceDecl *Def = ID->getDefinition(); | |||
2350 | if (!Def || !Def->getImplementation()) { | |||
2351 | llvm::DIScope *Mod = getParentModuleOrNull(ID); | |||
2352 | llvm::DIType *FwdDecl = DBuilder.createReplaceableCompositeType( | |||
2353 | llvm::dwarf::DW_TAG_structure_type, ID->getName(), Mod ? Mod : TheCU, | |||
2354 | DefUnit, Line, RuntimeLang); | |||
2355 | ObjCInterfaceCache.push_back(ObjCInterfaceCacheEntry(Ty, FwdDecl, Unit)); | |||
2356 | return FwdDecl; | |||
2357 | } | |||
2358 | ||||
2359 | return CreateTypeDefinition(Ty, Unit); | |||
2360 | } | |||
2361 | ||||
2362 | llvm::DIModule * | |||
2363 | CGDebugInfo::getOrCreateModuleRef(ExternalASTSource::ASTSourceDescriptor Mod, | |||
2364 | bool CreateSkeletonCU) { | |||
2365 | // Use the Module pointer as the key into the cache. This is a | |||
2366 | // nullptr if the "Module" is a PCH, which is safe because we don't | |||
2367 | // support chained PCH debug info, so there can only be a single PCH. | |||
2368 | const Module *M = Mod.getModuleOrNull(); | |||
2369 | auto ModRef = ModuleCache.find(M); | |||
2370 | if (ModRef != ModuleCache.end()) | |||
2371 | return cast<llvm::DIModule>(ModRef->second); | |||
2372 | ||||
2373 | // Macro definitions that were defined with "-D" on the command line. | |||
2374 | SmallString<128> ConfigMacros; | |||
2375 | { | |||
2376 | llvm::raw_svector_ostream OS(ConfigMacros); | |||
2377 | const auto &PPOpts = CGM.getPreprocessorOpts(); | |||
2378 | unsigned I = 0; | |||
2379 | // Translate the macro definitions back into a command line. | |||
2380 | for (auto &M : PPOpts.Macros) { | |||
2381 | if (++I > 1) | |||
2382 | OS << " "; | |||
2383 | const std::string &Macro = M.first; | |||
2384 | bool Undef = M.second; | |||
2385 | OS << "\"-" << (Undef ? 'U' : 'D'); | |||
2386 | for (char c : Macro) | |||
2387 | switch (c) { | |||
2388 | case '\\': | |||
2389 | OS << "\\\\"; | |||
2390 | break; | |||
2391 | case '"': | |||
2392 | OS << "\\\""; | |||
2393 | break; | |||
2394 | default: | |||
2395 | OS << c; | |||
2396 | } | |||
2397 | OS << '\"'; | |||
2398 | } | |||
2399 | } | |||
2400 | ||||
2401 | bool IsRootModule = M ? !M->Parent : true; | |||
2402 | // When a module name is specified as -fmodule-name, that module gets a | |||
2403 | // clang::Module object, but it won't actually be built or imported; it will | |||
2404 | // be textual. | |||
2405 | if (CreateSkeletonCU && IsRootModule && Mod.getASTFile().empty() && M) | |||
2406 | 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-10~svn374877/tools/clang/lib/CodeGen/CGDebugInfo.cpp" , 2407, __PRETTY_FUNCTION__)) | |||
2407 | "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-10~svn374877/tools/clang/lib/CodeGen/CGDebugInfo.cpp" , 2407, __PRETTY_FUNCTION__)); | |||
2408 | ||||
2409 | if (CreateSkeletonCU && IsRootModule && !Mod.getASTFile().empty()) { | |||
2410 | // PCH files don't have a signature field in the control block, | |||
2411 | // but LLVM detects skeleton CUs by looking for a non-zero DWO id. | |||
2412 | // We use the lower 64 bits for debug info. | |||
2413 | uint64_t Signature = | |||
2414 | Mod.getSignature() | |||
2415 | ? (uint64_t)Mod.getSignature()[1] << 32 | Mod.getSignature()[0] | |||
2416 | : ~1ULL; | |||
2417 | llvm::DIBuilder DIB(CGM.getModule()); | |||
2418 | DIB.createCompileUnit(TheCU->getSourceLanguage(), | |||
2419 | // TODO: Support "Source" from external AST providers? | |||
2420 | DIB.createFile(Mod.getModuleName(), Mod.getPath()), | |||
2421 | TheCU->getProducer(), true, StringRef(), 0, | |||
2422 | Mod.getASTFile(), llvm::DICompileUnit::FullDebug, | |||
2423 | Signature); | |||
2424 | DIB.finalize(); | |||
2425 | } | |||
2426 | ||||
2427 | llvm::DIModule *Parent = | |||
2428 | IsRootModule ? nullptr | |||
2429 | : getOrCreateModuleRef( | |||
2430 | ExternalASTSource::ASTSourceDescriptor(*M->Parent), | |||
2431 | CreateSkeletonCU); | |||
2432 | llvm::DIModule *DIMod = | |||
2433 | DBuilder.createModule(Parent, Mod.getModuleName(), ConfigMacros, | |||
2434 | Mod.getPath(), CGM.getHeaderSearchOpts().Sysroot); | |||
2435 | ModuleCache[M].reset(DIMod); | |||
2436 | return DIMod; | |||
2437 | } | |||
2438 | ||||
2439 | llvm::DIType *CGDebugInfo::CreateTypeDefinition(const ObjCInterfaceType *Ty, | |||
2440 | llvm::DIFile *Unit) { | |||
2441 | ObjCInterfaceDecl *ID = Ty->getDecl(); | |||
2442 | llvm::DIFile *DefUnit = getOrCreateFile(ID->getLocation()); | |||
2443 | unsigned Line = getLineNumber(ID->getLocation()); | |||
2444 | unsigned RuntimeLang = TheCU->getSourceLanguage(); | |||
2445 | ||||
2446 | // Bit size, align and offset of the type. | |||
2447 | uint64_t Size = CGM.getContext().getTypeSize(Ty); | |||
2448 | auto Align = getTypeAlignIfRequired(Ty, CGM.getContext()); | |||
2449 | ||||
2450 | llvm::DINode::DIFlags Flags = llvm::DINode::FlagZero; | |||
2451 | if (ID->getImplementation()) | |||
2452 | Flags |= llvm::DINode::FlagObjcClassComplete; | |||
2453 | ||||
2454 | llvm::DIScope *Mod = getParentModuleOrNull(ID); | |||
2455 | llvm::DICompositeType *RealDecl = DBuilder.createStructType( | |||
2456 | Mod ? Mod : Unit, ID->getName(), DefUnit, Line, Size, Align, Flags, | |||
2457 | nullptr, llvm::DINodeArray(), RuntimeLang); | |||
2458 | ||||
2459 | QualType QTy(Ty, 0); | |||
2460 | TypeCache[QTy.getAsOpaquePtr()].reset(RealDecl); | |||
2461 | ||||
2462 | // Push the struct on region stack. | |||
2463 | LexicalBlockStack.emplace_back(RealDecl); | |||
2464 | RegionMap[Ty->getDecl()].reset(RealDecl); | |||
2465 | ||||
2466 | // Convert all the elements. | |||
2467 | SmallVector<llvm::Metadata *, 16> EltTys; | |||
2468 | ||||
2469 | ObjCInterfaceDecl *SClass = ID->getSuperClass(); | |||
2470 | if (SClass) { | |||
2471 | llvm::DIType *SClassTy = | |||
2472 | getOrCreateType(CGM.getContext().getObjCInterfaceType(SClass), Unit); | |||
2473 | if (!SClassTy) | |||
2474 | return nullptr; | |||
2475 | ||||
2476 | llvm::DIType *InhTag = DBuilder.createInheritance(RealDecl, SClassTy, 0, 0, | |||
2477 | llvm::DINode::FlagZero); | |||
2478 | EltTys.push_back(InhTag); | |||
2479 | } | |||
2480 | ||||
2481 | // Create entries for all of the properties. | |||
2482 | auto AddProperty = [&](const ObjCPropertyDecl *PD) { | |||
2483 | SourceLocation Loc = PD->getLocation(); | |||
2484 | llvm::DIFile *PUnit = getOrCreateFile(Loc); | |||
2485 | unsigned PLine = getLineNumber(Loc); | |||
2486 | ObjCMethodDecl *Getter = PD->getGetterMethodDecl(); | |||
2487 | ObjCMethodDecl *Setter = PD->getSetterMethodDecl(); | |||
2488 | llvm::MDNode *PropertyNode = DBuilder.createObjCProperty( | |||
2489 | PD->getName(), PUnit, PLine, | |||
2490 | hasDefaultGetterName(PD, Getter) ? "" | |||
2491 | : getSelectorName(PD->getGetterName()), | |||
2492 | hasDefaultSetterName(PD, Setter) ? "" | |||
2493 | : getSelectorName(PD->getSetterName()), | |||
2494 | PD->getPropertyAttributes(), getOrCreateType(PD->getType(), PUnit)); | |||
2495 | EltTys.push_back(PropertyNode); | |||
2496 | }; | |||
2497 | { | |||
2498 | llvm::SmallPtrSet<const IdentifierInfo *, 16> PropertySet; | |||
2499 | for (const ObjCCategoryDecl *ClassExt : ID->known_extensions()) | |||
2500 | for (auto *PD : ClassExt->properties()) { | |||
2501 | PropertySet.insert(PD->getIdentifier()); | |||
2502 | AddProperty(PD); | |||
2503 | } | |||
2504 | for (const auto *PD : ID->properties()) { | |||
2505 | // Don't emit duplicate metadata for properties that were already in a | |||
2506 | // class extension. | |||
2507 | if (!PropertySet.insert(PD->getIdentifier()).second) | |||
2508 | continue; | |||
2509 | AddProperty(PD); | |||
2510 | } | |||
2511 | } | |||
2512 | ||||
2513 | const ASTRecordLayout &RL = CGM.getContext().getASTObjCInterfaceLayout(ID); | |||
2514 | unsigned FieldNo = 0; | |||
2515 | for (ObjCIvarDecl *Field = ID->all_declared_ivar_begin(); Field; | |||
2516 | Field = Field->getNextIvar(), ++FieldNo) { | |||
2517 | llvm::DIType *FieldTy = getOrCreateType(Field->getType(), Unit); | |||
2518 | if (!FieldTy) | |||
2519 | return nullptr; | |||
2520 | ||||
2521 | StringRef FieldName = Field->getName(); | |||
2522 | ||||
2523 | // Ignore unnamed fields. | |||
2524 | if (FieldName.empty()) | |||
2525 | continue; | |||
2526 | ||||
2527 | // Get the location for the field. | |||
2528 | llvm::DIFile *FieldDefUnit = getOrCreateFile(Field->getLocation()); | |||
2529 | unsigned FieldLine = getLineNumber(Field->getLocation()); | |||
2530 | QualType FType = Field->getType(); | |||
2531 | uint64_t FieldSize = 0; | |||
2532 | uint32_t FieldAlign = 0; | |||
2533 | ||||
2534 | if (!FType->isIncompleteArrayType()) { | |||
2535 | ||||
2536 | // Bit size, align and offset of the type. | |||
2537 | FieldSize = Field->isBitField() | |||
2538 | ? Field->getBitWidthValue(CGM.getContext()) | |||
2539 | : CGM.getContext().getTypeSize(FType); | |||
2540 | FieldAlign = getTypeAlignIfRequired(FType, CGM.getContext()); | |||
2541 | } | |||
2542 | ||||
2543 | uint64_t FieldOffset; | |||
2544 | if (CGM.getLangOpts().ObjCRuntime.isNonFragile()) { | |||
2545 | // We don't know the runtime offset of an ivar if we're using the | |||
2546 | // non-fragile ABI. For bitfields, use the bit offset into the first | |||
2547 | // byte of storage of the bitfield. For other fields, use zero. | |||
2548 | if (Field->isBitField()) { | |||
2549 | FieldOffset = | |||
2550 | CGM.getObjCRuntime().ComputeBitfieldBitOffset(CGM, ID, Field); | |||
2551 | FieldOffset %= CGM.getContext().getCharWidth(); | |||
2552 | } else { | |||
2553 | FieldOffset = 0; | |||
2554 | } | |||
2555 | } else { | |||
2556 | FieldOffset = RL.getFieldOffset(FieldNo); | |||
2557 | } | |||
2558 | ||||
2559 | llvm::DINode::DIFlags Flags = llvm::DINode::FlagZero; | |||
2560 | if (Field->getAccessControl() == ObjCIvarDecl::Protected) | |||
2561 | Flags = llvm::DINode::FlagProtected; | |||
2562 | else if (Field->getAccessControl() == ObjCIvarDecl::Private) | |||
2563 | Flags = llvm::DINode::FlagPrivate; | |||
2564 | else if (Field->getAccessControl() == ObjCIvarDecl::Public) | |||
2565 | Flags = llvm::DINode::FlagPublic; | |||
2566 | ||||
2567 | llvm::MDNode *PropertyNode = nullptr; | |||
2568 | if (ObjCImplementationDecl *ImpD = ID->getImplementation()) { | |||
2569 | if (ObjCPropertyImplDecl *PImpD = | |||
2570 | ImpD->FindPropertyImplIvarDecl(Field->getIdentifier())) { | |||
2571 | if (ObjCPropertyDecl *PD = PImpD->getPropertyDecl()) { | |||
2572 | SourceLocation Loc = PD->getLocation(); | |||
2573 | llvm::DIFile *PUnit = getOrCreateFile(Loc); | |||
2574 | unsigned PLine = getLineNumber(Loc); | |||
2575 | ObjCMethodDecl *Getter = PD->getGetterMethodDecl(); | |||
2576 | ObjCMethodDecl *Setter = PD->getSetterMethodDecl(); | |||
2577 | PropertyNode = DBuilder.createObjCProperty( | |||
2578 | PD->getName(), PUnit, PLine, | |||
2579 | hasDefaultGetterName(PD, Getter) | |||
2580 | ? "" | |||
2581 | : getSelectorName(PD->getGetterName()), | |||
2582 | hasDefaultSetterName(PD, Setter) | |||
2583 | ? "" | |||
2584 | : getSelectorName(PD->getSetterName()), | |||
2585 | PD->getPropertyAttributes(), | |||
2586 | getOrCreateType(PD->getType(), PUnit)); | |||
2587 | } | |||
2588 | } | |||
2589 | } | |||
2590 | FieldTy = DBuilder.createObjCIVar(FieldName, FieldDefUnit, FieldLine, | |||
2591 | FieldSize, FieldAlign, FieldOffset, Flags, | |||
2592 | FieldTy, PropertyNode); | |||
2593 | EltTys.push_back(FieldTy); | |||
2594 | } | |||
2595 | ||||
2596 | llvm::DINodeArray Elements = DBuilder.getOrCreateArray(EltTys); | |||
2597 | DBuilder.replaceArrays(RealDecl, Elements); | |||
2598 | ||||
2599 | LexicalBlockStack.pop_back(); | |||
2600 | return RealDecl; | |||
2601 | } | |||
2602 | ||||
2603 | llvm::DIType *CGDebugInfo::CreateType(const VectorType *Ty, | |||
2604 | llvm::DIFile *Unit) { | |||
2605 | llvm::DIType *ElementTy = getOrCreateType(Ty->getElementType(), Unit); | |||
2606 | int64_t Count = Ty->getNumElements(); | |||
2607 | ||||
2608 | llvm::Metadata *Subscript; | |||
2609 | QualType QTy(Ty, 0); | |||
2610 | auto SizeExpr = SizeExprCache.find(QTy); | |||
2611 | if (SizeExpr != SizeExprCache.end()) | |||
2612 | Subscript = DBuilder.getOrCreateSubrange(0, SizeExpr->getSecond()); | |||
2613 | else | |||
2614 | Subscript = DBuilder.getOrCreateSubrange(0, Count ? Count : -1); | |||
2615 | llvm::DINodeArray SubscriptArray = DBuilder.getOrCreateArray(Subscript); | |||
2616 | ||||
2617 | uint64_t Size = CGM.getContext().getTypeSize(Ty); | |||
2618 | auto Align = getTypeAlignIfRequired(Ty, CGM.getContext()); | |||
2619 | ||||
2620 | return DBuilder.createVectorType(Size, Align, ElementTy, SubscriptArray); | |||
2621 | } | |||
2622 | ||||
2623 | llvm::DIType *CGDebugInfo::CreateType(const ArrayType *Ty, llvm::DIFile *Unit) { | |||
2624 | uint64_t Size; | |||
2625 | uint32_t Align; | |||
2626 | ||||
2627 | // FIXME: make getTypeAlign() aware of VLAs and incomplete array types | |||
2628 | if (const auto *VAT = dyn_cast<VariableArrayType>(Ty)) { | |||
2629 | Size = 0; | |||
2630 | Align = getTypeAlignIfRequired(CGM.getContext().getBaseElementType(VAT), | |||
2631 | CGM.getContext()); | |||
2632 | } else if (Ty->isIncompleteArrayType()) { | |||
2633 | Size = 0; | |||
2634 | if (Ty->getElementType()->isIncompleteType()) | |||
2635 | Align = 0; | |||
2636 | else | |||
2637 | Align = getTypeAlignIfRequired(Ty->getElementType(), CGM.getContext()); | |||
2638 | } else if (Ty->isIncompleteType()) { | |||
2639 | Size = 0; | |||
2640 | Align = 0; | |||
2641 | } else { | |||
2642 | // Size and align of the whole array, not the element type. | |||
2643 | Size = CGM.getContext().getTypeSize(Ty); | |||
2644 | Align = getTypeAlignIfRequired(Ty, CGM.getContext()); | |||
2645 | } | |||
2646 | ||||
2647 | // Add the dimensions of the array. FIXME: This loses CV qualifiers from | |||
2648 | // interior arrays, do we care? Why aren't nested arrays represented the | |||
2649 | // obvious/recursive way? | |||
2650 | SmallVector<llvm::Metadata *, 8> Subscripts; | |||
2651 | QualType EltTy(Ty, 0); | |||
2652 | while ((Ty = dyn_cast<ArrayType>(EltTy))) { | |||
2653 | // If the number of elements is known, then count is that number. Otherwise, | |||
2654 | // it's -1. This allows us to represent a subrange with an array of 0 | |||
2655 | // elements, like this: | |||
2656 | // | |||
2657 | // struct foo { | |||
2658 | // int x[0]; | |||
2659 | // }; | |||
2660 | int64_t Count = -1; // Count == -1 is an unbounded array. | |||
2661 | if (const auto *CAT = dyn_cast<ConstantArrayType>(Ty)) | |||
2662 | Count = CAT->getSize().getZExtValue(); | |||
2663 | else if (const auto *VAT = dyn_cast<VariableArrayType>(Ty)) { | |||
2664 | if (Expr *Size = VAT->getSizeExpr()) { | |||
2665 | Expr::EvalResult Result; | |||
2666 | if (Size->EvaluateAsInt(Result, CGM.getContext())) | |||
2667 | Count = Result.Val.getInt().getExtValue(); | |||
2668 | } | |||
2669 | } | |||
2670 | ||||
2671 | auto SizeNode = SizeExprCache.find(EltTy); | |||
2672 | if (SizeNode != SizeExprCache.end()) | |||
2673 | Subscripts.push_back( | |||
2674 | DBuilder.getOrCreateSubrange(0, SizeNode->getSecond())); | |||
2675 | else | |||
2676 | Subscripts.push_back(DBuilder.getOrCreateSubrange(0, Count)); | |||
2677 | EltTy = Ty->getElementType(); | |||
2678 | } | |||
2679 | ||||
2680 | llvm::DINodeArray SubscriptArray = DBuilder.getOrCreateArray(Subscripts); | |||
2681 | ||||
2682 | return DBuilder.createArrayType(Size, Align, getOrCreateType(EltTy, Unit), | |||
2683 | SubscriptArray); | |||
2684 | } | |||
2685 | ||||
2686 | llvm::DIType *CGDebugInfo::CreateType(const LValueReferenceType *Ty, | |||
2687 | llvm::DIFile *Unit) { | |||
2688 | return CreatePointerLikeType(llvm::dwarf::DW_TAG_reference_type, Ty, | |||
2689 | Ty->getPointeeType(), Unit); | |||
2690 | } | |||
2691 | ||||
2692 | llvm::DIType *CGDebugInfo::CreateType(const RValueReferenceType *Ty, | |||
2693 | llvm::DIFile *Unit) { | |||
2694 | return CreatePointerLikeType(llvm::dwarf::DW_TAG_rvalue_reference_type, Ty, | |||
2695 | Ty->getPointeeType(), Unit); | |||
2696 | } | |||
2697 | ||||
2698 | llvm::DIType *CGDebugInfo::CreateType(const MemberPointerType *Ty, | |||
2699 | llvm::DIFile *U) { | |||
2700 | llvm::DINode::DIFlags Flags = llvm::DINode::FlagZero; | |||
2701 | uint64_t Size = 0; | |||
2702 | ||||
2703 | if (!Ty->isIncompleteType()) { | |||
2704 | Size = CGM.getContext().getTypeSize(Ty); | |||
2705 | ||||
2706 | // Set the MS inheritance model. There is no flag for the unspecified model. | |||
2707 | if (CGM.getTarget().getCXXABI().isMicrosoft()) { | |||
2708 | switch (Ty->getMostRecentCXXRecordDecl()->getMSInheritanceModel()) { | |||
2709 | case MSInheritanceAttr::Keyword_single_inheritance: | |||
2710 | Flags |= llvm::DINode::FlagSingleInheritance; | |||
2711 | break; | |||
2712 | case MSInheritanceAttr::Keyword_multiple_inheritance: | |||
2713 | Flags |= llvm::DINode::FlagMultipleInheritance; | |||
2714 | break; | |||
2715 | case MSInheritanceAttr::Keyword_virtual_inheritance: | |||
2716 | Flags |= llvm::DINode::FlagVirtualInheritance; | |||
2717 | break; | |||
2718 | case MSInheritanceAttr::Keyword_unspecified_inheritance: | |||
2719 | break; | |||
2720 | case MSInheritanceAttr::SpellingNotCalculated: | |||
2721 | llvm_unreachable("Spelling not yet calculated")::llvm::llvm_unreachable_internal("Spelling not yet calculated" , "/build/llvm-toolchain-snapshot-10~svn374877/tools/clang/lib/CodeGen/CGDebugInfo.cpp" , 2721); | |||
2722 | } | |||
2723 | } | |||
2724 | } | |||
2725 | ||||
2726 | llvm::DIType *ClassType = getOrCreateType(QualType(Ty->getClass(), 0), U); | |||
2727 | if (Ty->isMemberDataPointerType()) | |||
2728 | return DBuilder.createMemberPointerType( | |||
2729 | getOrCreateType(Ty->getPointeeType(), U), ClassType, Size, /*Align=*/0, | |||
2730 | Flags); | |||
2731 | ||||
2732 | const FunctionProtoType *FPT = | |||
2733 | Ty->getPointeeType()->getAs<FunctionProtoType>(); | |||
2734 | return DBuilder.createMemberPointerType( | |||
2735 | getOrCreateInstanceMethodType( | |||
2736 | CXXMethodDecl::getThisType(FPT, Ty->getMostRecentCXXRecordDecl()), | |||
2737 | FPT, U), | |||
2738 | ClassType, Size, /*Align=*/0, Flags); | |||
2739 | } | |||
2740 | ||||
2741 | llvm::DIType *CGDebugInfo::CreateType(const AtomicType *Ty, llvm::DIFile *U) { | |||
2742 | auto *FromTy = getOrCreateType(Ty->getValueType(), U); | |||
2743 | return DBuilder.createQualifiedType(llvm::dwarf::DW_TAG_atomic_type, FromTy); | |||
2744 | } | |||
2745 | ||||
2746 | llvm::DIType *CGDebugInfo::CreateType(const PipeType *Ty, llvm::DIFile *U) { | |||
2747 | return getOrCreateType(Ty->getElementType(), U); | |||
2748 | } | |||
2749 | ||||
2750 | llvm::DIType *CGDebugInfo::CreateEnumType(const EnumType *Ty) { | |||
2751 | const EnumDecl *ED = Ty->getDecl(); | |||
2752 | ||||
2753 | uint64_t Size = 0; | |||
2754 | uint32_t Align = 0; | |||
2755 | if (!ED->getTypeForDecl()->isIncompleteType()) { | |||
2756 | Size = CGM.getContext().getTypeSize(ED->getTypeForDecl()); | |||
2757 | Align = getDeclAlignIfRequired(ED, CGM.getContext()); | |||
2758 | } | |||
2759 | ||||
2760 | SmallString<256> Identifier = getTypeIdentifier(Ty, CGM, TheCU); | |||
2761 | ||||
2762 | bool isImportedFromModule = | |||
2763 | DebugTypeExtRefs && ED->isFromASTFile() && ED->getDefinition(); | |||
2764 | ||||
2765 | // If this is just a forward declaration, construct an appropriately | |||
2766 | // marked node and just return it. | |||
2767 | if (isImportedFromModule || !ED->getDefinition()) { | |||
2768 | // Note that it is possible for enums to be created as part of | |||
2769 | // their own declcontext. In this case a FwdDecl will be created | |||
2770 | // twice. This doesn't cause a problem because both FwdDecls are | |||
2771 | // entered into the ReplaceMap: finalize() will replace the first | |||
2772 | // FwdDecl with the second and then replace the second with | |||
2773 | // complete type. | |||
2774 | llvm::DIScope *EDContext = getDeclContextDescriptor(ED); | |||
2775 | llvm::DIFile *DefUnit = getOrCreateFile(ED->getLocation()); | |||
2776 | llvm::TempDIScope TmpContext(DBuilder.createReplaceableCompositeType( | |||
2777 | llvm::dwarf::DW_TAG_enumeration_type, "", TheCU, DefUnit, 0)); | |||
2778 | ||||
2779 | unsigned Line = getLineNumber(ED->getLocation()); | |||
2780 | StringRef EDName = ED->getName(); | |||
2781 | llvm::DIType *RetTy = DBuilder.createReplaceableCompositeType( | |||
2782 | llvm::dwarf::DW_TAG_enumeration_type, EDName, EDContext, DefUnit, Line, | |||
2783 | 0, Size, Align, llvm::DINode::FlagFwdDecl, Identifier); | |||
2784 | ||||
2785 | ReplaceMap.emplace_back( | |||
2786 | std::piecewise_construct, std::make_tuple(Ty), | |||
2787 | std::make_tuple(static_cast<llvm::Metadata *>(RetTy))); | |||
2788 | return RetTy; | |||
2789 | } | |||
2790 | ||||
2791 | return CreateTypeDefinition(Ty); | |||
2792 | } | |||
2793 | ||||
2794 | llvm::DIType *CGDebugInfo::CreateTypeDefinition(const EnumType *Ty) { | |||
2795 | const EnumDecl *ED = Ty->getDecl(); | |||
2796 | uint64_t Size = 0; | |||
2797 | uint32_t Align = 0; | |||
2798 | if (!ED->getTypeForDecl()->isIncompleteType()) { | |||
2799 | Size = CGM.getContext().getTypeSize(ED->getTypeForDecl()); | |||
2800 | Align = getDeclAlignIfRequired(ED, CGM.getContext()); | |||
2801 | } | |||
2802 | ||||
2803 | SmallString<256> Identifier = getTypeIdentifier(Ty, CGM, TheCU); | |||
2804 | ||||
2805 | // Create elements for each enumerator. | |||
2806 | SmallVector<llvm::Metadata *, 16> Enumerators; | |||
2807 | ED = ED->getDefinition(); | |||
2808 | bool IsSigned = ED->getIntegerType()->isSignedIntegerType(); | |||
2809 | for (const auto *Enum : ED->enumerators()) { | |||
2810 | const auto &InitVal = Enum->getInitVal(); | |||
2811 | auto Value = IsSigned ? InitVal.getSExtValue() : InitVal.getZExtValue(); | |||
2812 | Enumerators.push_back( | |||
2813 | DBuilder.createEnumerator(Enum->getName(), Value, !IsSigned)); | |||
2814 | } | |||
2815 | ||||
2816 | // Return a CompositeType for the enum itself. | |||
2817 | llvm::DINodeArray EltArray = DBuilder.getOrCreateArray(Enumerators); | |||
2818 | ||||
2819 | llvm::DIFile *DefUnit = getOrCreateFile(ED->getLocation()); | |||
2820 | unsigned Line = getLineNumber(ED->getLocation()); | |||
2821 | llvm::DIScope *EnumContext = getDeclContextDescriptor(ED); | |||
2822 | llvm::DIType *ClassTy = getOrCreateType(ED->getIntegerType(), DefUnit); | |||
2823 | return DBuilder.createEnumerationType(EnumContext, ED->getName(), DefUnit, | |||
2824 | Line, Size, Align, EltArray, ClassTy, | |||
2825 | Identifier, ED->isScoped()); | |||
2826 | } | |||
2827 | ||||
2828 | llvm::DIMacro *CGDebugInfo::CreateMacro(llvm::DIMacroFile *Parent, | |||
2829 | unsigned MType, SourceLocation LineLoc, | |||
2830 | StringRef Name, StringRef Value) { | |||
2831 | unsigned Line = LineLoc.isInvalid() ? 0 : getLineNumber(LineLoc); | |||
2832 | return DBuilder.createMacro(Parent, Line, MType, Name, Value); | |||
2833 | } | |||
2834 | ||||
2835 | llvm::DIMacroFile *CGDebugInfo::CreateTempMacroFile(llvm::DIMacroFile *Parent, | |||
2836 | SourceLocation LineLoc, | |||
2837 | SourceLocation FileLoc) { | |||
2838 | llvm::DIFile *FName = getOrCreateFile(FileLoc); | |||
2839 | unsigned Line = LineLoc.isInvalid() ? 0 : getLineNumber(LineLoc); | |||
2840 | return DBuilder.createTempMacroFile(Parent, Line, FName); | |||
2841 | } | |||
2842 | ||||
2843 | static QualType UnwrapTypeForDebugInfo(QualType T, const ASTContext &C) { | |||
2844 | Qualifiers Quals; | |||
2845 | do { | |||
2846 | Qualifiers InnerQuals = T.getLocalQualifiers(); | |||
2847 | // Qualifiers::operator+() doesn't like it if you add a Qualifier | |||
2848 | // that is already there. | |||
2849 | Quals += Qualifiers::removeCommonQualifiers(Quals, InnerQuals); | |||
2850 | Quals += InnerQuals; | |||
2851 | QualType LastT = T; | |||
2852 | switch (T->getTypeClass()) { | |||
2853 | default: | |||
2854 | return C.getQualifiedType(T.getTypePtr(), Quals); | |||
2855 | case Type::TemplateSpecialization: { | |||
2856 | const auto *Spec = cast<TemplateSpecializationType>(T); | |||
2857 | if (Spec->isTypeAlias()) | |||
2858 | return C.getQualifiedType(T.getTypePtr(), Quals); | |||
2859 | T = Spec->desugar(); | |||
2860 | break; | |||
2861 | } | |||
2862 | case Type::TypeOfExpr: | |||
2863 | T = cast<TypeOfExprType>(T)->getUnderlyingExpr()->getType(); | |||
2864 | break; | |||
2865 | case Type::TypeOf: | |||
2866 | T = cast<TypeOfType>(T)->getUnderlyingType(); | |||
2867 | break; | |||
2868 | case Type::Decltype: | |||
2869 | T = cast<DecltypeType>(T)->getUnderlyingType(); | |||
2870 | break; | |||
2871 | case Type::UnaryTransform: | |||
2872 | T = cast<UnaryTransformType>(T)->getUnderlyingType(); | |||
2873 | break; | |||
2874 | case Type::Attributed: | |||
2875 | T = cast<AttributedType>(T)->getEquivalentType(); | |||
2876 | break; | |||
2877 | case Type::Elaborated: | |||
2878 | T = cast<ElaboratedType>(T)->getNamedType(); | |||
2879 | break; | |||
2880 | case Type::Paren: | |||
2881 | T = cast<ParenType>(T)->getInnerType(); | |||
2882 | break; | |||
2883 | case Type::MacroQualified: | |||
2884 | T = cast<MacroQualifiedType>(T)->getUnderlyingType(); | |||
2885 | break; | |||
2886 | case Type::SubstTemplateTypeParm: | |||
2887 | T = cast<SubstTemplateTypeParmType>(T)->getReplacementType(); | |||
2888 | break; | |||
2889 | case Type::Auto: | |||
2890 | case Type::DeducedTemplateSpecialization: { | |||
2891 | QualType DT = cast<DeducedType>(T)->getDeducedType(); | |||
2892 | 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-10~svn374877/tools/clang/lib/CodeGen/CGDebugInfo.cpp" , 2892, __PRETTY_FUNCTION__)); | |||
2893 | T = DT; | |||
2894 | break; | |||
2895 | } | |||
2896 | case Type::Adjusted: | |||
2897 | case Type::Decayed: | |||
2898 | // Decayed and adjusted types use the adjusted type in LLVM and DWARF. | |||
2899 | T = cast<AdjustedType>(T)->getAdjustedType(); | |||
2900 | break; | |||
2901 | } | |||
2902 | ||||
2903 | 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-10~svn374877/tools/clang/lib/CodeGen/CGDebugInfo.cpp" , 2903, __PRETTY_FUNCTION__)); | |||
2904 | (void)LastT; | |||
2905 | } while (true); | |||
2906 | } | |||
2907 | ||||
2908 | llvm::DIType *CGDebugInfo::getTypeOrNull(QualType Ty) { | |||
2909 | ||||
2910 | // Unwrap the type as needed for debug information. | |||
2911 | Ty = UnwrapTypeForDebugInfo(Ty, CGM.getContext()); | |||
2912 | ||||
2913 | auto It = TypeCache.find(Ty.getAsOpaquePtr()); | |||
2914 | if (It != TypeCache.end()) { | |||
2915 | // Verify that the debug info still exists. | |||
2916 | if (llvm::Metadata *V = It->second) | |||
2917 | return cast<llvm::DIType>(V); | |||
2918 | } | |||
2919 | ||||
2920 | return nullptr; | |||
2921 | } | |||
2922 | ||||
2923 | void CGDebugInfo::completeTemplateDefinition( | |||
2924 | const ClassTemplateSpecializationDecl &SD) { | |||
2925 | if (DebugKind <= codegenoptions::DebugLineTablesOnly) | |||
2926 | return; | |||
2927 | completeUnusedClass(SD); | |||
2928 | } | |||
2929 | ||||
2930 | void CGDebugInfo::completeUnusedClass(const CXXRecordDecl &D) { | |||
2931 | if (DebugKind <= codegenoptions::DebugLineTablesOnly) | |||
2932 | return; | |||
2933 | ||||
2934 | completeClassData(&D); | |||
2935 | // In case this type has no member function definitions being emitted, ensure | |||
2936 | // it is retained | |||
2937 | RetainedTypes.push_back(CGM.getContext().getRecordType(&D).getAsOpaquePtr()); | |||
2938 | } | |||
2939 | ||||
2940 | llvm::DIType *CGDebugInfo::getOrCreateType(QualType Ty, llvm::DIFile *Unit) { | |||
2941 | if (Ty.isNull()) | |||
2942 | return nullptr; | |||
2943 | ||||
2944 | // Unwrap the type as needed for debug information. | |||
2945 | Ty = UnwrapTypeForDebugInfo(Ty, CGM.getContext()); | |||
2946 | ||||
2947 | if (auto *T = getTypeOrNull(Ty)) | |||
2948 | return T; | |||
2949 | ||||
2950 | llvm::DIType *Res = CreateTypeNode(Ty, Unit); | |||
2951 | void *TyPtr = Ty.getAsOpaquePtr(); | |||
2952 | ||||
2953 | // And update the type cache. | |||
2954 | TypeCache[TyPtr].reset(Res); | |||
2955 | ||||
2956 | return Res; | |||
2957 | } | |||
2958 | ||||
2959 | llvm::DIModule *CGDebugInfo::getParentModuleOrNull(const Decl *D) { | |||
2960 | // A forward declaration inside a module header does not belong to the module. | |||
2961 | if (isa<RecordDecl>(D) && !cast<RecordDecl>(D)->getDefinition()) | |||
2962 | return nullptr; | |||
2963 | if (DebugTypeExtRefs && D->isFromASTFile()) { | |||
2964 | // Record a reference to an imported clang module or precompiled header. | |||
2965 | auto *Reader = CGM.getContext().getExternalSource(); | |||
2966 | auto Idx = D->getOwningModuleID(); | |||
2967 | auto Info = Reader->getSourceDescriptor(Idx); | |||
2968 | if (Info) | |||
2969 | return getOrCreateModuleRef(*Info, /*SkeletonCU=*/true); | |||
2970 | } else if (ClangModuleMap) { | |||
2971 | // We are building a clang module or a precompiled header. | |||
2972 | // | |||
2973 | // TODO: When D is a CXXRecordDecl or a C++ Enum, the ODR applies | |||
2974 | // and it wouldn't be necessary to specify the parent scope | |||
2975 | // because the type is already unique by definition (it would look | |||
2976 | // like the output of -fno-standalone-debug). On the other hand, | |||
2977 | // the parent scope helps a consumer to quickly locate the object | |||
2978 | // file where the type's definition is located, so it might be | |||
2979 | // best to make this behavior a command line or debugger tuning | |||
2980 | // option. | |||
2981 | if (Module *M = D->getOwningModule()) { | |||
2982 | // This is a (sub-)module. | |||
2983 | auto Info = ExternalASTSource::ASTSourceDescriptor(*M); | |||
2984 | return getOrCreateModuleRef(Info, /*SkeletonCU=*/false); | |||
2985 | } else { | |||
2986 | // This the precompiled header being built. | |||
2987 | return getOrCreateModuleRef(PCHDescriptor, /*SkeletonCU=*/false); | |||
2988 | } | |||
2989 | } | |||
2990 | ||||
2991 | return nullptr; | |||
2992 | } | |||
2993 | ||||
2994 | llvm::DIType *CGDebugInfo::CreateTypeNode(QualType Ty, llvm::DIFile *Unit) { | |||
2995 | // Handle qualifiers, which recursively handles what they refer to. | |||
2996 | if (Ty.hasLocalQualifiers()) | |||
2997 | return CreateQualifiedType(Ty, Unit); | |||
2998 | ||||
2999 | // Work out details of type. | |||
3000 | switch (Ty->getTypeClass()) { | |||
3001 | #define TYPE(Class, Base) | |||
3002 | #define ABSTRACT_TYPE(Class, Base) | |||
3003 | #define NON_CANONICAL_TYPE(Class, Base) | |||
3004 | #define DEPENDENT_TYPE(Class, Base) case Type::Class: | |||
3005 | #include "clang/AST/TypeNodes.inc" | |||
3006 | 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-10~svn374877/tools/clang/lib/CodeGen/CGDebugInfo.cpp" , 3006); | |||
3007 | ||||
3008 | case Type::ExtVector: | |||
3009 | case Type::Vector: | |||
3010 | return CreateType(cast<VectorType>(Ty), Unit); | |||
3011 | case Type::ObjCObjectPointer: | |||
3012 | return CreateType(cast<ObjCObjectPointerType>(Ty), Unit); | |||
3013 | case Type::ObjCObject: | |||
3014 | return CreateType(cast<ObjCObjectType>(Ty), Unit); | |||
3015 | case Type::ObjCTypeParam: | |||
3016 | return CreateType(cast<ObjCTypeParamType>(Ty), Unit); | |||
3017 | case Type::ObjCInterface: | |||
3018 | return CreateType(cast<ObjCInterfaceType>(Ty), Unit); | |||
3019 | case Type::Builtin: | |||
3020 | return CreateType(cast<BuiltinType>(Ty)); | |||
3021 | case Type::Complex: | |||
3022 | return CreateType(cast<ComplexType>(Ty)); | |||
3023 | case Type::Pointer: | |||
3024 | return CreateType(cast<PointerType>(Ty), Unit); | |||
3025 | case Type::BlockPointer: | |||
3026 | return CreateType(cast<BlockPointerType>(Ty), Unit); | |||
3027 | case Type::Typedef: | |||
3028 | return CreateType(cast<TypedefType>(Ty), Unit); | |||
3029 | case Type::Record: | |||
3030 | return CreateType(cast<RecordType>(Ty)); | |||
3031 | case Type::Enum: | |||
3032 | return CreateEnumType(cast<EnumType>(Ty)); | |||
3033 | case Type::FunctionProto: | |||
3034 | case Type::FunctionNoProto: | |||
3035 | return CreateType(cast<FunctionType>(Ty), Unit); | |||
3036 | case Type::ConstantArray: | |||
3037 | case Type::VariableArray: | |||
3038 | case Type::IncompleteArray: | |||
3039 | return CreateType(cast<ArrayType>(Ty), Unit); | |||
3040 | ||||
3041 | case Type::LValueReference: | |||
3042 | return CreateType(cast<LValueReferenceType>(Ty), Unit); | |||
3043 | case Type::RValueReference: | |||
3044 | return CreateType(cast<RValueReferenceType>(Ty), Unit); | |||
3045 | ||||
3046 | case Type::MemberPointer: | |||
3047 | return CreateType(cast<MemberPointerType>(Ty), Unit); | |||
3048 | ||||
3049 | case Type::Atomic: | |||
3050 | return CreateType(cast<AtomicType>(Ty), Unit); | |||
3051 | ||||
3052 | case Type::Pipe: | |||
3053 | return CreateType(cast<PipeType>(Ty), Unit); | |||
3054 | ||||
3055 | case Type::TemplateSpecialization: | |||
3056 | return CreateType(cast<TemplateSpecializationType>(Ty), Unit); | |||
3057 | ||||
3058 | case Type::Auto: | |||
3059 | case Type::Attributed: | |||
3060 | case Type::Adjusted: | |||
3061 | case Type::Decayed: | |||
3062 | case Type::DeducedTemplateSpecialization: | |||
3063 | case Type::Elaborated: | |||
3064 | case Type::Paren: | |||
3065 | case Type::MacroQualified: | |||
3066 | case Type::SubstTemplateTypeParm: | |||
3067 | case Type::TypeOfExpr: | |||
3068 | case Type::TypeOf: | |||
3069 | case Type::Decltype: | |||
3070 | case Type::UnaryTransform: | |||
3071 | case Type::PackExpansion: | |||
3072 | break; | |||
3073 | } | |||
3074 | ||||
3075 | llvm_unreachable("type should have been unwrapped!")::llvm::llvm_unreachable_internal("type should have been unwrapped!" , "/build/llvm-toolchain-snapshot-10~svn374877/tools/clang/lib/CodeGen/CGDebugInfo.cpp" , 3075); | |||
3076 | } | |||
3077 | ||||
3078 | llvm::DICompositeType *CGDebugInfo::getOrCreateLimitedType(const RecordType *Ty, | |||
3079 | llvm::DIFile *Unit) { | |||
3080 | QualType QTy(Ty, 0); | |||
3081 | ||||
3082 | auto *T = cast_or_null<llvm::DICompositeType>(getTypeOrNull(QTy)); | |||
3083 | ||||
3084 | // We may have cached a forward decl when we could have created | |||
3085 | // a non-forward decl. Go ahead and create a non-forward decl | |||
3086 | // now. | |||
3087 | if (T && !T->isForwardDecl()) | |||
3088 | return T; | |||
3089 | ||||
3090 | // Otherwise create the type. | |||
3091 | llvm::DICompositeType *Res = CreateLimitedType(Ty); | |||
3092 | ||||
3093 | // Propagate members from the declaration to the definition | |||
3094 | // CreateType(const RecordType*) will overwrite this with the members in the | |||
3095 | // correct order if the full type is needed. | |||
3096 | DBuilder.replaceArrays(Res, T ? T->getElements() : llvm::DINodeArray()); | |||
3097 | ||||
3098 | // And update the type cache. | |||
3099 | TypeCache[QTy.getAsOpaquePtr()].reset(Res); | |||
3100 | return Res; | |||
3101 | } | |||
3102 | ||||
3103 | // TODO: Currently used for context chains when limiting debug info. | |||
3104 | llvm::DICompositeType *CGDebugInfo::CreateLimitedType(const RecordType *Ty) { | |||
3105 | RecordDecl *RD = Ty->getDecl(); | |||
3106 | ||||
3107 | // Get overall information about the record type for the debug info. | |||
3108 | llvm::DIFile *DefUnit = getOrCreateFile(RD->getLocation()); | |||
3109 | unsigned Line = getLineNumber(RD->getLocation()); | |||
3110 | StringRef RDName = getClassName(RD); | |||
3111 | ||||
3112 | llvm::DIScope *RDContext = getDeclContextDescriptor(RD); | |||
3113 | ||||
3114 | // If we ended up creating the type during the context chain construction, | |||
3115 | // just return that. | |||
3116 | auto *T = cast_or_null<llvm::DICompositeType>( | |||
3117 | getTypeOrNull(CGM.getContext().getRecordType(RD))); | |||
3118 | if (T && (!T->isForwardDecl() || !RD->getDefinition())) | |||
3119 | return T; | |||
3120 | ||||
3121 | // If this is just a forward or incomplete declaration, construct an | |||
3122 | // appropriately marked node and just return it. | |||
3123 | const RecordDecl *D = RD->getDefinition(); | |||
3124 | if (!D || !D->isCompleteDefinition()) | |||
3125 | return getOrCreateRecordFwdDecl(Ty, RDContext); | |||
3126 | ||||
3127 | uint64_t Size = CGM.getContext().getTypeSize(Ty); | |||
3128 | auto Align = getDeclAlignIfRequired(D, CGM.getContext()); | |||
3129 | ||||
3130 | SmallString<256> Identifier = getTypeIdentifier(Ty, CGM, TheCU); | |||
3131 | ||||
3132 | // Explicitly record the calling convention and export symbols for C++ | |||
3133 | // records. | |||
3134 | auto Flags = llvm::DINode::FlagZero; | |||
3135 | if (auto CXXRD = dyn_cast<CXXRecordDecl>(RD)) { | |||
3136 | if (CGM.getCXXABI().getRecordArgABI(CXXRD) == CGCXXABI::RAA_Indirect) | |||
3137 | Flags |= llvm::DINode::FlagTypePassByReference; | |||
3138 | else | |||
3139 | Flags |= llvm::DINode::FlagTypePassByValue; | |||
3140 | ||||
3141 | // Record if a C++ record is non-trivial type. | |||
3142 | if (!CXXRD->isTrivial()) | |||
3143 | Flags |= llvm::DINode::FlagNonTrivial; | |||
3144 | ||||
3145 | // Record exports it symbols to the containing structure. | |||
3146 | if (CXXRD->isAnonymousStructOrUnion()) | |||
3147 | Flags |= llvm::DINode::FlagExportSymbols; | |||
3148 | } | |||
3149 | ||||
3150 | llvm::DICompositeType *RealDecl = DBuilder.createReplaceableCompositeType( | |||
3151 | getTagForRecord(RD), RDName, RDContext, DefUnit, Line, 0, Size, Align, | |||
3152 | Flags, Identifier); | |||
3153 | ||||
3154 | // Elements of composite types usually have back to the type, creating | |||
3155 | // uniquing cycles. Distinct nodes are more efficient. | |||
3156 | switch (RealDecl->getTag()) { | |||
3157 | default: | |||
3158 | llvm_unreachable("invalid composite type tag")::llvm::llvm_unreachable_internal("invalid composite type tag" , "/build/llvm-toolchain-snapshot-10~svn374877/tools/clang/lib/CodeGen/CGDebugInfo.cpp" , 3158); | |||
3159 | ||||
3160 | case llvm::dwarf::DW_TAG_array_type: | |||
3161 | case llvm::dwarf::DW_TAG_enumeration_type: | |||
3162 | // Array elements and most enumeration elements don't have back references, | |||
3163 | // so they don't tend to be involved in uniquing cycles and there is some | |||
3164 | // chance of merging them when linking together two modules. Only make | |||
3165 | // them distinct if they are ODR-uniqued. | |||
3166 | if (Identifier.empty()) | |||
3167 | break; | |||
3168 | LLVM_FALLTHROUGH[[gnu::fallthrough]]; | |||
3169 | ||||
3170 | case llvm::dwarf::DW_TAG_structure_type: | |||
3171 | case llvm::dwarf::DW_TAG_union_type: | |||
3172 | case llvm::dwarf::DW_TAG_class_type: | |||
3173 | // Immediately resolve to a distinct node. | |||
3174 | RealDecl = | |||
3175 | llvm::MDNode::replaceWithDistinct(llvm::TempDICompositeType(RealDecl)); | |||
3176 | break; | |||
3177 | } | |||
3178 | ||||
3179 | RegionMap[Ty->getDecl()].reset(RealDecl); | |||
3180 | TypeCache[QualType(Ty, 0).getAsOpaquePtr()].reset(RealDecl); | |||
3181 | ||||
3182 | if (const auto *TSpecial = dyn_cast<ClassTemplateSpecializationDecl>(RD)) | |||
3183 | DBuilder.replaceArrays(RealDecl, llvm::DINodeArray(), | |||
3184 | CollectCXXTemplateParams(TSpecial, DefUnit)); | |||
3185 | return RealDecl; | |||
3186 | } | |||
3187 | ||||
3188 | void CGDebugInfo::CollectContainingType(const CXXRecordDecl *RD, | |||
3189 | llvm::DICompositeType *RealDecl) { | |||
3190 | // A class's primary base or the class itself contains the vtable. | |||
3191 | llvm::DICompositeType *ContainingType = nullptr; | |||
3192 | const ASTRecordLayout &RL = CGM.getContext().getASTRecordLayout(RD); | |||
3193 | if (const CXXRecordDecl *PBase = RL.getPrimaryBase()) { | |||
3194 | // Seek non-virtual primary base root. | |||
3195 | while (1) { | |||
3196 | const ASTRecordLayout &BRL = CGM.getContext().getASTRecordLayout(PBase); | |||
3197 | const CXXRecordDecl *PBT = BRL.getPrimaryBase(); | |||
3198 | if (PBT && !BRL.isPrimaryBaseVirtual()) | |||
3199 | PBase = PBT; | |||
3200 | else | |||
3201 | break; | |||
3202 | } | |||
3203 | ContainingType = cast<llvm::DICompositeType>( | |||
3204 | getOrCreateType(QualType(PBase->getTypeForDecl(), 0), | |||
3205 | getOrCreateFile(RD->getLocation()))); | |||
3206 | } else if (RD->isDynamicClass()) | |||
3207 | ContainingType = RealDecl; | |||
3208 | ||||
3209 | DBuilder.replaceVTableHolder(RealDecl, ContainingType); | |||
3210 | } | |||
3211 | ||||
3212 | llvm::DIType *CGDebugInfo::CreateMemberType(llvm::DIFile *Unit, QualType FType, | |||
3213 | StringRef Name, uint64_t *Offset) { | |||
3214 | llvm::DIType *FieldTy = CGDebugInfo::getOrCreateType(FType, Unit); | |||
3215 | uint64_t FieldSize = CGM.getContext().getTypeSize(FType); | |||
3216 | auto FieldAlign = getTypeAlignIfRequired(FType, CGM.getContext()); | |||
3217 | llvm::DIType *Ty = | |||
3218 | DBuilder.createMemberType(Unit, Name, Unit, 0, FieldSize, FieldAlign, | |||
3219 | *Offset, llvm::DINode::FlagZero, FieldTy); | |||
3220 | *Offset += FieldSize; | |||
3221 | return Ty; | |||
3222 | } | |||
3223 | ||||
3224 | void CGDebugInfo::collectFunctionDeclProps(GlobalDecl GD, llvm::DIFile *Unit, | |||
3225 | StringRef &Name, | |||
3226 | StringRef &LinkageName, | |||
3227 | llvm::DIScope *&FDContext, | |||
3228 | llvm::DINodeArray &TParamsArray, | |||
3229 | llvm::DINode::DIFlags &Flags) { | |||
3230 | const auto *FD = cast<FunctionDecl>(GD.getDecl()); | |||
3231 | Name = getFunctionName(FD); | |||
3232 | // Use mangled name as linkage name for C/C++ functions. | |||
3233 | if (FD->hasPrototype()) { | |||
3234 | LinkageName = CGM.getMangledName(GD); | |||
3235 | Flags |= llvm::DINode::FlagPrototyped; | |||
3236 | } | |||
3237 | // No need to replicate the linkage name if it isn't different from the | |||
3238 | // subprogram name, no need to have it at all unless coverage is enabled or | |||
3239 | // debug is set to more than just line tables or extra debug info is needed. | |||
3240 | if (LinkageName == Name || (!CGM.getCodeGenOpts().EmitGcovArcs && | |||
3241 | !CGM.getCodeGenOpts().EmitGcovNotes && | |||
3242 | !CGM.getCodeGenOpts().DebugInfoForProfiling && | |||
3243 | DebugKind <= codegenoptions::DebugLineTablesOnly)) | |||
3244 | LinkageName = StringRef(); | |||
3245 | ||||
3246 | if (DebugKind >= codegenoptions::LimitedDebugInfo) { | |||
3247 | if (const NamespaceDecl *NSDecl = | |||
3248 | dyn_cast_or_null<NamespaceDecl>(FD->getDeclContext())) | |||
3249 | FDContext = getOrCreateNamespace(NSDecl); | |||
3250 | else if (const RecordDecl *RDecl = | |||
3251 | dyn_cast_or_null<RecordDecl>(FD->getDeclContext())) { | |||
3252 | llvm::DIScope *Mod = getParentModuleOrNull(RDecl); | |||
3253 | FDContext = getContextDescriptor(RDecl, Mod ? Mod : TheCU); | |||
3254 | } | |||
3255 | // Check if it is a noreturn-marked function | |||
3256 | if (FD->isNoReturn()) | |||
3257 | Flags |= llvm::DINode::FlagNoReturn; | |||
3258 | // Collect template parameters. | |||
3259 | TParamsArray = CollectFunctionTemplateParams(FD, Unit); | |||
3260 | } | |||
3261 | } | |||
3262 | ||||
3263 | void CGDebugInfo::collectVarDeclProps(const VarDecl *VD, llvm::DIFile *&Unit, | |||
3264 | unsigned &LineNo, QualType &T, | |||
3265 | StringRef &Name, StringRef &LinkageName, | |||
3266 | llvm::MDTuple *&TemplateParameters, | |||
3267 | llvm::DIScope *&VDContext) { | |||
3268 | Unit = getOrCreateFile(VD->getLocation()); | |||
3269 | LineNo = getLineNumber(VD->getLocation()); | |||
3270 | ||||
3271 | setLocation(VD->getLocation()); | |||
3272 | ||||
3273 | T = VD->getType(); | |||
3274 | if (T->isIncompleteArrayType()) { | |||
3275 | // CodeGen turns int[] into int[1] so we'll do the same here. | |||
3276 | llvm::APInt ConstVal(32, 1); | |||
3277 | QualType ET = CGM.getContext().getAsArrayType(T)->getElementType(); | |||
3278 | ||||
3279 | T = CGM.getContext().getConstantArrayType(ET, ConstVal, nullptr, | |||
3280 | ArrayType::Normal, 0); | |||
3281 | } | |||
3282 | ||||
3283 | Name = VD->getName(); | |||
3284 | if (VD->getDeclContext() && !isa<FunctionDecl>(VD->getDeclContext()) && | |||
3285 | !isa<ObjCMethodDecl>(VD->getDeclContext())) | |||
3286 | LinkageName = CGM.getMangledName(VD); | |||
3287 | if (LinkageName == Name) | |||
3288 | LinkageName = StringRef(); | |||
3289 | ||||
3290 | if (isa<VarTemplateSpecializationDecl>(VD)) { | |||
3291 | llvm::DINodeArray parameterNodes = CollectVarTemplateParams(VD, &*Unit); | |||
3292 | TemplateParameters = parameterNodes.get(); | |||
3293 | } else { | |||
3294 | TemplateParameters = nullptr; | |||
3295 | } | |||
3296 | ||||
3297 | // Since we emit declarations (DW_AT_members) for static members, place the | |||
3298 | // definition of those static members in the namespace they were declared in | |||
3299 | // in the source code (the lexical decl context). | |||
3300 | // FIXME: Generalize this for even non-member global variables where the | |||
3301 | // declaration and definition may have different lexical decl contexts, once | |||
3302 | // we have support for emitting declarations of (non-member) global variables. | |||
3303 | const DeclContext *DC = VD->isStaticDataMember() ? VD->getLexicalDeclContext() | |||
3304 | : VD->getDeclContext(); | |||
3305 | // When a record type contains an in-line initialization of a static data | |||
3306 | // member, and the record type is marked as __declspec(dllexport), an implicit | |||
3307 | // definition of the member will be created in the record context. DWARF | |||
3308 | // doesn't seem to have a nice way to describe this in a form that consumers | |||
3309 | // are likely to understand, so fake the "normal" situation of a definition | |||
3310 | // outside the class by putting it in the global scope. | |||
3311 | if (DC->isRecord()) | |||
3312 | DC = CGM.getContext().getTranslationUnitDecl(); | |||
3313 | ||||
3314 | llvm::DIScope *Mod = getParentModuleOrNull(VD); | |||
3315 | VDContext = getContextDescriptor(cast<Decl>(DC), Mod ? Mod : TheCU); | |||
3316 | } | |||
3317 | ||||
3318 | llvm::DISubprogram *CGDebugInfo::getFunctionFwdDeclOrStub(GlobalDecl GD, | |||
3319 | bool Stub) { | |||
3320 | llvm::DINodeArray TParamsArray; | |||
3321 | StringRef Name, LinkageName; | |||
3322 | llvm::DINode::DIFlags Flags = llvm::DINode::FlagZero; | |||
3323 | llvm::DISubprogram::DISPFlags SPFlags = llvm::DISubprogram::SPFlagZero; | |||
3324 | SourceLocation Loc = GD.getDecl()->getLocation(); | |||
3325 | llvm::DIFile *Unit = getOrCreateFile(Loc); | |||
3326 | llvm::DIScope *DContext = Unit; | |||
3327 | unsigned Line = getLineNumber(Loc); | |||
3328 | collectFunctionDeclProps(GD, Unit, Name, LinkageName, DContext, TParamsArray, | |||
3329 | Flags); | |||
3330 | auto *FD = dyn_cast<FunctionDecl>(GD.getDecl()); | |||
3331 | ||||
3332 | // Build function type. | |||
3333 | SmallVector<QualType, 16> ArgTypes; | |||
3334 | if (FD
| |||
3335 | for (const ParmVarDecl *Parm : FD->parameters()) | |||
3336 | ArgTypes.push_back(Parm->getType()); | |||
3337 | CallingConv CC = FD->getType()->castAs<FunctionType>()->getCallConv(); | |||
| ||||
3338 | QualType FnType = CGM.getContext().getFunctionType( | |||
3339 | FD->getReturnType(), ArgTypes, FunctionProtoType::ExtProtoInfo(CC)); | |||
3340 | if (!FD->isExternallyVisible()) | |||
3341 | SPFlags |= llvm::DISubprogram::SPFlagLocalToUnit; | |||
3342 | if (CGM.getLangOpts().Optimize) | |||
3343 | SPFlags |= llvm::DISubprogram::SPFlagOptimized; | |||
3344 | ||||
3345 | if (Stub) { | |||
3346 | Flags |= getCallSiteRelatedAttrs(); | |||
3347 | SPFlags |= llvm::DISubprogram::SPFlagDefinition; | |||
3348 | return DBuilder.createFunction( | |||
3349 | DContext, Name, LinkageName, Unit, Line, | |||
3350 | getOrCreateFunctionType(GD.getDecl(), FnType, Unit), 0, Flags, SPFlags, | |||
3351 | TParamsArray.get(), getFunctionDeclaration(FD)); | |||
3352 | } | |||
3353 | ||||
3354 | llvm::DISubprogram *SP = DBuilder.createTempFunctionFwdDecl( | |||
3355 | DContext, Name, LinkageName, Unit, Line, | |||
3356 | getOrCreateFunctionType(GD.getDecl(), FnType, Unit), 0, Flags, SPFlags, | |||
3357 | TParamsArray.get(), getFunctionDeclaration(FD)); | |||
3358 | const FunctionDecl *CanonDecl = FD->getCanonicalDecl(); | |||
3359 | FwdDeclReplaceMap.emplace_back(std::piecewise_construct, | |||
3360 | std::make_tuple(CanonDecl), | |||
3361 | std::make_tuple(SP)); | |||
3362 | return SP; | |||
3363 | } | |||
3364 | ||||
3365 | llvm::DISubprogram *CGDebugInfo::getFunctionForwardDeclaration(GlobalDecl GD) { | |||
3366 | return getFunctionFwdDeclOrStub(GD, /* Stub = */ false); | |||
3367 | } | |||
3368 | ||||
3369 | llvm::DISubprogram *CGDebugInfo::getFunctionStub(GlobalDecl GD) { | |||
3370 | return getFunctionFwdDeclOrStub(GD, /* Stub = */ true); | |||
3371 | } | |||
3372 | ||||
3373 | llvm::DIGlobalVariable * | |||
3374 | CGDebugInfo::getGlobalVariableForwardDeclaration(const VarDecl *VD) { | |||
3375 | QualType T; | |||
3376 | StringRef Name, LinkageName; | |||
3377 | SourceLocation Loc = VD->getLocation(); | |||
3378 | llvm::DIFile *Unit = getOrCreateFile(Loc); | |||
3379 | llvm::DIScope *DContext = Unit; | |||
3380 | unsigned Line = getLineNumber(Loc); | |||
3381 | llvm::MDTuple *TemplateParameters = nullptr; | |||
3382 | ||||
3383 | collectVarDeclProps(VD, Unit, Line, T, Name, LinkageName, TemplateParameters, | |||
3384 | DContext); | |||
3385 | auto Align = getDeclAlignIfRequired(VD, CGM.getContext()); | |||
3386 | auto *GV = DBuilder.createTempGlobalVariableFwdDecl( | |||
3387 | DContext, Name, LinkageName, Unit, Line, getOrCreateType(T, Unit), | |||
3388 | !VD->isExternallyVisible(), nullptr, TemplateParameters, Align); | |||
3389 | FwdDeclReplaceMap.emplace_back( | |||
3390 | std::piecewise_construct, | |||
3391 | std::make_tuple(cast<VarDecl>(VD->getCanonicalDecl())), | |||
3392 | std::make_tuple(static_cast<llvm::Metadata *>(GV))); | |||
3393 | return GV; | |||
3394 | } | |||
3395 | ||||
3396 | llvm::DINode *CGDebugInfo::getDeclarationOrDefinition(const Decl *D) { | |||
3397 | // We only need a declaration (not a definition) of the type - so use whatever | |||
3398 | // we would otherwise do to get a type for a pointee. (forward declarations in | |||
3399 | // limited debug info, full definitions (if the type definition is available) | |||
3400 | // in unlimited debug info) | |||
3401 | if (const auto *TD
| |||
3402 | return getOrCreateType(CGM.getContext().getTypeDeclType(TD), | |||
3403 | getOrCreateFile(TD->getLocation())); | |||
3404 | auto I = DeclCache.find(D->getCanonicalDecl()); | |||
3405 | ||||
3406 | if (I != DeclCache.end()) { | |||
3407 | auto N = I->second; | |||
3408 | if (auto *GVE = dyn_cast_or_null<llvm::DIGlobalVariableExpression>(N)) | |||
3409 | return GVE->getVariable(); | |||
3410 | return dyn_cast_or_null<llvm::DINode>(N); | |||
3411 | } | |||
3412 | ||||
3413 | // No definition for now. Emit a forward definition that might be | |||
3414 | // merged with a potential upcoming definition. | |||
3415 | if (const auto *FD
| |||
3416 | return getFunctionForwardDeclaration(FD); | |||
3417 | else if (const auto *VD = dyn_cast<VarDecl>(D)) | |||
3418 | return getGlobalVariableForwardDeclaration(VD); | |||
3419 | ||||
3420 | return nullptr; | |||
3421 | } | |||
3422 | ||||
3423 | llvm::DISubprogram *CGDebugInfo::getFunctionDeclaration(const Decl *D) { | |||
3424 | if (!D || DebugKind <= codegenoptions::DebugLineTablesOnly) | |||
3425 | return nullptr; | |||
3426 | ||||
3427 | const auto *FD = dyn_cast<FunctionDecl>(D); | |||
3428 | if (!FD) | |||
3429 | return nullptr; | |||
3430 | ||||
3431 | // Setup context. | |||
3432 | auto *S = getDeclContextDescriptor(D); | |||
3433 | ||||
3434 | auto MI = SPCache.find(FD->getCanonicalDecl()); | |||
3435 | if (MI == SPCache.end()) { | |||
3436 | if (const auto *MD = dyn_cast<CXXMethodDecl>(FD->getCanonicalDecl())) { | |||
3437 | return CreateCXXMemberFunction(MD, getOrCreateFile(MD->getLocation()), | |||
3438 | cast<llvm::DICompositeType>(S)); | |||
3439 | } | |||
3440 | } | |||
3441 | if (MI != SPCache.end()) { | |||
3442 | auto *SP = dyn_cast_or_null<llvm::DISubprogram>(MI->second); | |||
3443 | if (SP && !SP->isDefinition()) | |||
3444 | return SP; | |||
3445 | } | |||
3446 | ||||
3447 | for (auto NextFD : FD->redecls()) { | |||
3448 | auto MI = SPCache.find(NextFD->getCanonicalDecl()); | |||
3449 | if (MI != SPCache.end()) { | |||
3450 | auto *SP = dyn_cast_or_null<llvm::DISubprogram>(MI->second); | |||
3451 | if (SP && !SP->isDefinition()) | |||
3452 | return SP; | |||
3453 | } | |||
3454 | } | |||
3455 | return nullptr; | |||
3456 | } | |||
3457 | ||||
3458 | // getOrCreateFunctionType - Construct type. If it is a c++ method, include | |||
3459 | // implicit parameter "this". | |||
3460 | llvm::DISubroutineType *CGDebugInfo::getOrCreateFunctionType(const Decl *D, | |||
3461 | QualType FnType, | |||
3462 | llvm::DIFile *F) { | |||
3463 | if (!D || DebugKind <= codegenoptions::DebugLineTablesOnly) | |||
3464 | // Create fake but valid subroutine type. Otherwise -verify would fail, and | |||
3465 | // subprogram DIE will miss DW_AT_decl_file and DW_AT_decl_line fields. | |||
3466 | return DBuilder.createSubroutineType(DBuilder.getOrCreateTypeArray(None)); | |||
3467 | ||||
3468 | if (const auto *Method = dyn_cast<CXXMethodDecl>(D)) | |||
3469 | return getOrCreateMethodType(Method, F); | |||
3470 | ||||
3471 | const auto *FTy = FnType->getAs<FunctionType>(); | |||
3472 | CallingConv CC = FTy ? FTy->getCallConv() : CallingConv::CC_C; | |||
3473 | ||||
3474 | if (const auto *OMethod = dyn_cast<ObjCMethodDecl>(D)) { | |||
3475 | // Add "self" and "_cmd" | |||
3476 | SmallVector<llvm::Metadata *, 16> Elts; | |||
3477 | ||||
3478 | // First element is always return type. For 'void' functions it is NULL. | |||
3479 | QualType ResultTy = OMethod->getReturnType(); | |||
3480 | ||||
3481 | // Replace the instancetype keyword with the actual type. | |||
3482 | if (ResultTy == CGM.getContext().getObjCInstanceType()) | |||
3483 | ResultTy = CGM.getContext().getPointerType( | |||
3484 | QualType(OMethod->getClassInterface()->getTypeForDecl(), 0)); | |||
3485 | ||||
3486 | Elts.push_back(getOrCreateType(ResultTy, F)); | |||
3487 | // "self" pointer is always first argument. | |||
3488 | QualType SelfDeclTy; | |||
3489 | if (auto *SelfDecl = OMethod->getSelfDecl()) | |||
3490 | SelfDeclTy = SelfDecl->getType(); | |||
3491 | else if (auto *FPT = dyn_cast<FunctionProtoType>(FnType)) | |||
3492 | if (FPT->getNumParams() > 1) | |||
3493 | SelfDeclTy = FPT->getParamType(0); | |||
3494 | if (!SelfDeclTy.isNull()) | |||
3495 | Elts.push_back( | |||
3496 | CreateSelfType(SelfDeclTy, getOrCreateType(SelfDeclTy, F))); | |||
3497 | // "_cmd" pointer is always second argument. | |||
3498 | Elts.push_back(DBuilder.createArtificialType( | |||
3499 | getOrCreateType(CGM.getContext().getObjCSelType(), F))); | |||
3500 | // Get rest of the arguments. | |||
3501 | for (const auto *PI : OMethod->parameters()) | |||
3502 | Elts.push_back(getOrCreateType(PI->getType(), F)); | |||
3503 | // Variadic methods need a special marker at the end of the type list. | |||
3504 | if (OMethod->isVariadic()) | |||
3505 | Elts.push_back(DBuilder.createUnspecifiedParameter()); | |||
3506 | ||||
3507 | llvm::DITypeRefArray EltTypeArray = DBuilder.getOrCreateTypeArray(Elts); | |||
3508 | return DBuilder.createSubroutineType(EltTypeArray, llvm::DINode::FlagZero, | |||
3509 | getDwarfCC(CC)); | |||
3510 | } | |||
3511 | ||||
3512 | // Handle variadic function types; they need an additional | |||
3513 | // unspecified parameter. | |||
3514 | if (const auto *FD = dyn_cast<FunctionDecl>(D)) | |||
3515 | if (FD->isVariadic()) { | |||
3516 | SmallVector<llvm::Metadata *, 16> EltTys; | |||
3517 | EltTys.push_back(getOrCreateType(FD->getReturnType(), F)); | |||
3518 | if (const auto *FPT = dyn_cast<FunctionProtoType>(FnType)) | |||
3519 | for (QualType ParamType : FPT->param_types()) | |||
3520 | EltTys.push_back(getOrCreateType(ParamType, F)); | |||
3521 | EltTys.push_back(DBuilder.createUnspecifiedParameter()); | |||
3522 | llvm::DITypeRefArray EltTypeArray = DBuilder.getOrCreateTypeArray(EltTys); | |||
3523 | return DBuilder.createSubroutineType(EltTypeArray, llvm::DINode::FlagZero, | |||
3524 | getDwarfCC(CC)); | |||
3525 | } | |||
3526 | ||||
3527 | return cast<llvm::DISubroutineType>(getOrCreateType(FnType, F)); | |||
3528 | } | |||
3529 | ||||
3530 | void CGDebugInfo::EmitFunctionStart(GlobalDecl GD, SourceLocation Loc, | |||
3531 | SourceLocation ScopeLoc, QualType FnType, | |||
3532 | llvm::Function *Fn, bool CurFuncIsThunk, | |||
3533 | CGBuilderTy &Builder) { | |||
3534 | ||||
3535 | StringRef Name; | |||
3536 | StringRef LinkageName; | |||
3537 | ||||
3538 | FnBeginRegionCount.push_back(LexicalBlockStack.size()); | |||
3539 | ||||
3540 | const Decl *D = GD.getDecl(); | |||
3541 | bool HasDecl = (D != nullptr); | |||
3542 | ||||
3543 | llvm::DINode::DIFlags Flags = llvm::DINode::FlagZero; | |||
3544 | llvm::DISubprogram::DISPFlags SPFlags = llvm::DISubprogram::SPFlagZero; | |||
3545 | llvm::DIFile *Unit = getOrCreateFile(Loc); | |||
3546 | llvm::DIScope *FDContext = Unit; | |||
3547 | llvm::DINodeArray TParamsArray; | |||
3548 | if (!HasDecl) { | |||
3549 | // Use llvm function name. | |||
3550 | LinkageName = Fn->getName(); | |||
3551 | } else if (const auto *FD = dyn_cast<FunctionDecl>(D)) { | |||
3552 | // If there is a subprogram for this function available then use it. | |||
3553 | auto FI = SPCache.find(FD->getCanonicalDecl()); | |||
3554 | if (FI != SPCache.end()) { | |||
3555 | auto *SP = dyn_cast_or_null<llvm::DISubprogram>(FI->second); | |||
3556 | if (SP && SP->isDefinition()) { | |||
3557 | LexicalBlockStack.emplace_back(SP); | |||
3558 | RegionMap[D].reset(SP); | |||
3559 | return; | |||
3560 | } | |||
3561 | } | |||
3562 | collectFunctionDeclProps(GD, Unit, Name, LinkageName, FDContext, | |||
3563 | TParamsArray, Flags); | |||
3564 | } else if (const auto *OMD = dyn_cast<ObjCMethodDecl>(D)) { | |||
3565 | Name = getObjCMethodName(OMD); | |||
3566 | Flags |= llvm::DINode::FlagPrototyped; | |||
3567 | } else if (isa<VarDecl>(D) && | |||
3568 | GD.getDynamicInitKind() != DynamicInitKind::NoStub) { | |||
3569 | // This is a global initializer or atexit destructor for a global variable. | |||
3570 | Name = getDynamicInitializerName(cast<VarDecl>(D), GD.getDynamicInitKind(), | |||
3571 | Fn); | |||
3572 | } else { | |||
3573 | // Use llvm function name. | |||
3574 | Name = Fn->getName(); | |||
3575 | Flags |= llvm::DINode::FlagPrototyped; | |||
3576 | } | |||
3577 | if (Name.startswith("\01")) | |||
3578 | Name = Name.substr(1); | |||
3579 | ||||
3580 | if (!HasDecl || D->isImplicit() || D->hasAttr<ArtificialAttr>()) { | |||
3581 | Flags |= llvm::DINode::FlagArtificial; | |||
3582 | // Artificial functions should not silently reuse CurLoc. | |||
3583 | CurLoc = SourceLocation(); | |||
3584 | } | |||
3585 | ||||
3586 | if (CurFuncIsThunk) | |||
3587 | Flags |= llvm::DINode::FlagThunk; | |||
3588 | ||||
3589 | if (Fn->hasLocalLinkage()) | |||
3590 | SPFlags |= llvm::DISubprogram::SPFlagLocalToUnit; | |||
3591 | if (CGM.getLangOpts().Optimize) | |||
3592 | SPFlags |= llvm::DISubprogram::SPFlagOptimized; | |||
3593 | ||||
3594 | llvm::DINode::DIFlags FlagsForDef = Flags | getCallSiteRelatedAttrs(); | |||
3595 | llvm::DISubprogram::DISPFlags SPFlagsForDef = | |||
3596 | SPFlags | llvm::DISubprogram::SPFlagDefinition; | |||
3597 | ||||
3598 | unsigned LineNo = getLineNumber(Loc); | |||
3599 | unsigned ScopeLine = getLineNumber(ScopeLoc); | |||
3600 | ||||
3601 | // FIXME: The function declaration we're constructing here is mostly reusing | |||
3602 | // declarations from CXXMethodDecl and not constructing new ones for arbitrary | |||
3603 | // FunctionDecls. When/if we fix this we can have FDContext be TheCU/null for | |||
3604 | // all subprograms instead of the actual context since subprogram definitions | |||
3605 | // are emitted as CU level entities by the backend. | |||
3606 | llvm::DISubprogram *SP = DBuilder.createFunction( | |||
3607 | FDContext, Name, LinkageName, Unit, LineNo, | |||
3608 | getOrCreateFunctionType(D, FnType, Unit), ScopeLine, FlagsForDef, | |||
3609 | SPFlagsForDef, TParamsArray.get(), getFunctionDeclaration(D)); | |||
3610 | Fn->setSubprogram(SP); | |||
3611 | // We might get here with a VarDecl in the case we're generating | |||
3612 | // code for the initialization of globals. Do not record these decls | |||
3613 | // as they will overwrite the actual VarDecl Decl in the cache. | |||
3614 | if (HasDecl && isa<FunctionDecl>(D)) | |||
3615 | DeclCache[D->getCanonicalDecl()].reset(SP); | |||
3616 | ||||
3617 | // We use the SPDefCache only in the case when the debug entry values option | |||
3618 | // is set, in order to speed up parameters modification analysis. | |||
3619 | // | |||
3620 | // FIXME: Use AbstractCallee here to support ObjCMethodDecl. | |||
3621 | if (CGM.getCodeGenOpts().EnableDebugEntryValues && HasDecl) | |||
3622 | if (auto *FD = dyn_cast<FunctionDecl>(D)) | |||
3623 | if (FD->hasBody() && !FD->param_empty()) | |||
3624 | SPDefCache[FD].reset(SP); | |||
3625 | ||||
3626 | if (CGM.getCodeGenOpts().DwarfVersion >= 5) { | |||
3627 | // Starting with DWARF V5 method declarations are emitted as children of | |||
3628 | // the interface type. | |||
3629 | if (const auto *OMD = dyn_cast_or_null<ObjCMethodDecl>(D)) { | |||
3630 | const ObjCInterfaceDecl *ID = OMD->getClassInterface(); | |||
3631 | QualType QTy(ID->getTypeForDecl(), 0); | |||
3632 | auto It = TypeCache.find(QTy.getAsOpaquePtr()); | |||
3633 | if (It != TypeCache.end()) { | |||
3634 | llvm::DICompositeType *InterfaceDecl = | |||
3635 | cast<llvm::DICompositeType>(It->second); | |||
3636 | llvm::DISubprogram *FD = DBuilder.createFunction( | |||
3637 | InterfaceDecl, Name, LinkageName, Unit, LineNo, | |||
3638 | getOrCreateFunctionType(D, FnType, Unit), ScopeLine, Flags, SPFlags, | |||
3639 | TParamsArray.get()); | |||
3640 | DBuilder.finalizeSubprogram(FD); | |||
3641 | ObjCMethodCache[ID].push_back(FD); | |||
3642 | } | |||
3643 | } | |||
3644 | } | |||
3645 | ||||
3646 | // Push the function onto the lexical block stack. | |||
3647 | LexicalBlockStack.emplace_back(SP); | |||
3648 | ||||
3649 | if (HasDecl) | |||
3650 | RegionMap[D].reset(SP); | |||
3651 | } | |||
3652 | ||||
3653 | void CGDebugInfo::EmitFunctionDecl(GlobalDecl GD, SourceLocation Loc, | |||
3654 | QualType FnType, llvm::Function *Fn) { | |||
3655 | StringRef Name; | |||
3656 | StringRef LinkageName; | |||
3657 | ||||
3658 | const Decl *D = GD.getDecl(); | |||
3659 | if (!D) | |||
3660 | return; | |||
3661 | ||||
3662 | llvm::DINode::DIFlags Flags = llvm::DINode::FlagZero; | |||
3663 | llvm::DIFile *Unit = getOrCreateFile(Loc); | |||
3664 | bool IsDeclForCallSite = Fn ? true : false; | |||
3665 | llvm::DIScope *FDContext = | |||
3666 | IsDeclForCallSite ? Unit : getDeclContextDescriptor(D); | |||
3667 | llvm::DINodeArray TParamsArray; | |||
3668 | if (isa<FunctionDecl>(D)) { | |||
3669 | // If there is a DISubprogram for this function available then use it. | |||
3670 | collectFunctionDeclProps(GD, Unit, Name, LinkageName, FDContext, | |||
3671 | TParamsArray, Flags); | |||
3672 | } else if (const auto *OMD = dyn_cast<ObjCMethodDecl>(D)) { | |||
3673 | Name = getObjCMethodName(OMD); | |||
3674 | Flags |= llvm::DINode::FlagPrototyped; | |||
3675 | } else { | |||
3676 | llvm_unreachable("not a function or ObjC method")::llvm::llvm_unreachable_internal("not a function or ObjC method" , "/build/llvm-toolchain-snapshot-10~svn374877/tools/clang/lib/CodeGen/CGDebugInfo.cpp" , 3676); | |||
3677 | } | |||
3678 | if (!Name.empty() && Name[0] == '\01') | |||
3679 | Name = Name.substr(1); | |||
3680 | ||||
3681 | if (D->isImplicit()) { | |||
3682 | Flags |= llvm::DINode::FlagArtificial; | |||
3683 | // Artificial functions without a location should not silently reuse CurLoc. | |||
3684 | if (Loc.isInvalid()) | |||
3685 | CurLoc = SourceLocation(); | |||
3686 | } | |||
3687 | unsigned LineNo = getLineNumber(Loc); | |||
3688 | unsigned ScopeLine = 0; | |||
3689 | llvm::DISubprogram::DISPFlags SPFlags = llvm::DISubprogram::SPFlagZero; | |||
3690 | if (CGM.getLangOpts().Optimize) | |||
3691 | SPFlags |= llvm::DISubprogram::SPFlagOptimized; | |||
3692 | ||||
3693 | llvm::DISubprogram *SP = DBuilder.createFunction( | |||
3694 | FDContext, Name, LinkageName, Unit, LineNo, | |||
3695 | getOrCreateFunctionType(D, FnType, Unit), ScopeLine, Flags, SPFlags, | |||
3696 | TParamsArray.get(), getFunctionDeclaration(D)); | |||
3697 | ||||
3698 | if (IsDeclForCallSite) | |||
3699 | Fn->setSubprogram(SP); | |||
3700 | ||||
3701 | DBuilder.retainType(SP); | |||
3702 | } | |||
3703 | ||||
3704 | void CGDebugInfo::EmitFuncDeclForCallSite(llvm::CallBase *CallOrInvoke, | |||
3705 | QualType CalleeType, | |||
3706 | const FunctionDecl *CalleeDecl) { | |||
3707 | auto &CGOpts = CGM.getCodeGenOpts(); | |||
3708 | if (!CGOpts.EnableDebugEntryValues || !CGM.getLangOpts().Optimize || | |||
3709 | !CallOrInvoke) | |||
3710 | return; | |||
3711 | ||||
3712 | auto *Func = CallOrInvoke->getCalledFunction(); | |||
3713 | if (!Func) | |||
3714 | return; | |||
3715 | ||||
3716 | // If there is no DISubprogram attached to the function being called, | |||
3717 | // create the one describing the function in order to have complete | |||
3718 | // call site debug info. | |||
3719 | if (Func->getSubprogram()) | |||
3720 | return; | |||
3721 | ||||
3722 | if (!CalleeDecl->isStatic() && !CalleeDecl->isInlined()) | |||
3723 | EmitFunctionDecl(CalleeDecl, CalleeDecl->getLocation(), CalleeType, Func); | |||
3724 | } | |||
3725 | ||||
3726 | void CGDebugInfo::EmitInlineFunctionStart(CGBuilderTy &Builder, GlobalDecl GD) { | |||
3727 | const auto *FD = cast<FunctionDecl>(GD.getDecl()); | |||
3728 | // If there is a subprogram for this function available then use it. | |||
3729 | auto FI = SPCache.find(FD->getCanonicalDecl()); | |||
3730 | llvm::DISubprogram *SP = nullptr; | |||
3731 | if (FI != SPCache.end()) | |||
3732 | SP = dyn_cast_or_null<llvm::DISubprogram>(FI->second); | |||
3733 | if (!SP || !SP->isDefinition()) | |||
3734 | SP = getFunctionStub(GD); | |||
3735 | FnBeginRegionCount.push_back(LexicalBlockStack.size()); | |||
3736 | LexicalBlockStack.emplace_back(SP); | |||
3737 | setInlinedAt(Builder.getCurrentDebugLocation()); | |||
3738 | EmitLocation(Builder, FD->getLocation()); | |||
3739 | } | |||
3740 | ||||
3741 | void CGDebugInfo::EmitInlineFunctionEnd(CGBuilderTy &Builder) { | |||
3742 | 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-10~svn374877/tools/clang/lib/CodeGen/CGDebugInfo.cpp" , 3742, __PRETTY_FUNCTION__)); | |||
3743 | EmitFunctionEnd(Builder, nullptr); | |||
3744 | setInlinedAt(llvm::DebugLoc(CurInlinedAt).getInlinedAt()); | |||
3745 | } | |||
3746 | ||||
3747 | void CGDebugInfo::EmitLocation(CGBuilderTy &Builder, SourceLocation Loc) { | |||
3748 | // Update our current location | |||
3749 | setLocation(Loc); | |||
3750 | ||||
3751 | if (CurLoc.isInvalid() || CurLoc.isMacroID() || LexicalBlockStack.empty()) | |||
3752 | return; | |||
3753 | ||||
3754 | llvm::MDNode *Scope = LexicalBlockStack.back(); | |||
3755 | Builder.SetCurrentDebugLocation(llvm::DebugLoc::get( | |||
3756 | getLineNumber(CurLoc), getColumnNumber(CurLoc), Scope, CurInlinedAt)); | |||
3757 | } | |||
3758 | ||||
3759 | void CGDebugInfo::CreateLexicalBlock(SourceLocation Loc) { | |||
3760 | llvm::MDNode *Back = nullptr; | |||
3761 | if (!LexicalBlockStack.empty()) | |||
3762 | Back = LexicalBlockStack.back().get(); | |||
3763 | LexicalBlockStack.emplace_back(DBuilder.createLexicalBlock( | |||
3764 | cast<llvm::DIScope>(Back), getOrCreateFile(CurLoc), getLineNumber(CurLoc), | |||
3765 | getColumnNumber(CurLoc))); | |||
3766 | } | |||
3767 | ||||
3768 | void CGDebugInfo::AppendAddressSpaceXDeref( | |||
3769 | unsigned AddressSpace, SmallVectorImpl<int64_t> &Expr) const { | |||
3770 | Optional<unsigned> DWARFAddressSpace = | |||
3771 | CGM.getTarget().getDWARFAddressSpace(AddressSpace); | |||
3772 | if (!DWARFAddressSpace) | |||
3773 | return; | |||
3774 | ||||
3775 | Expr.push_back(llvm::dwarf::DW_OP_constu); | |||
3776 | Expr.push_back(DWARFAddressSpace.getValue()); | |||
3777 | Expr.push_back(llvm::dwarf::DW_OP_swap); | |||
3778 | Expr.push_back(llvm::dwarf::DW_OP_xderef); | |||
3779 | } | |||
3780 | ||||
3781 | void CGDebugInfo::EmitLexicalBlockStart(CGBuilderTy &Builder, | |||
3782 | SourceLocation Loc) { | |||
3783 | // Set our current location. | |||
3784 | setLocation(Loc); | |||
3785 | ||||
3786 | // Emit a line table change for the current location inside the new scope. | |||
3787 | Builder.SetCurrentDebugLocation( | |||
3788 | llvm::DebugLoc::get(getLineNumber(Loc), getColumnNumber(Loc), | |||
3789 | LexicalBlockStack.back(), CurInlinedAt)); | |||
3790 | ||||
3791 | if (DebugKind <= codegenoptions::DebugLineTablesOnly) | |||
3792 | return; | |||
3793 | ||||
3794 | // Create a new lexical block and push it on the stack. | |||
3795 | CreateLexicalBlock(Loc); | |||
3796 | } | |||
3797 | ||||
3798 | void CGDebugInfo::EmitLexicalBlockEnd(CGBuilderTy &Builder, | |||
3799 | SourceLocation Loc) { | |||
3800 | 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-10~svn374877/tools/clang/lib/CodeGen/CGDebugInfo.cpp" , 3800, __PRETTY_FUNCTION__)); | |||
3801 | ||||
3802 | // Provide an entry in the line table for the end of the block. | |||
3803 | EmitLocation(Builder, Loc); | |||
3804 | ||||
3805 | if (DebugKind <= codegenoptions::DebugLineTablesOnly) | |||
3806 | return; | |||
3807 | ||||
3808 | LexicalBlockStack.pop_back(); | |||
3809 | } | |||
3810 | ||||
3811 | void CGDebugInfo::EmitFunctionEnd(CGBuilderTy &Builder, llvm::Function *Fn) { | |||
3812 | 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-10~svn374877/tools/clang/lib/CodeGen/CGDebugInfo.cpp" , 3812, __PRETTY_FUNCTION__)); | |||
3813 | unsigned RCount = FnBeginRegionCount.back(); | |||
3814 | 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-10~svn374877/tools/clang/lib/CodeGen/CGDebugInfo.cpp" , 3814, __PRETTY_FUNCTION__)); | |||
3815 | ||||
3816 | // Pop all regions for this function. | |||
3817 | while (LexicalBlockStack.size() != RCount) { | |||
3818 | // Provide an entry in the line table for the end of the block. | |||
3819 | EmitLocation(Builder, CurLoc); | |||
3820 | LexicalBlockStack.pop_back(); | |||
3821 | } | |||
3822 | FnBeginRegionCount.pop_back(); | |||
3823 | ||||
3824 | if (Fn && Fn->getSubprogram()) | |||
3825 | DBuilder.finalizeSubprogram(Fn->getSubprogram()); | |||
3826 | } | |||
3827 | ||||
3828 | CGDebugInfo::BlockByRefType | |||
3829 | CGDebugInfo::EmitTypeForVarWithBlocksAttr(const VarDecl *VD, | |||
3830 | uint64_t *XOffset) { | |||
3831 | SmallVector<llvm::Metadata *, 5> EltTys; | |||
3832 | QualType FType; | |||
3833 | uint64_t FieldSize, FieldOffset; | |||
3834 | uint32_t FieldAlign; | |||
3835 | ||||
3836 | llvm::DIFile *Unit = getOrCreateFile(VD->getLocation()); | |||
3837 | QualType Type = VD->getType(); | |||
3838 | ||||
3839 | FieldOffset = 0; | |||
3840 | FType = CGM.getContext().getPointerType(CGM.getContext().VoidTy); | |||
3841 | EltTys.push_back(CreateMemberType(Unit, FType, "__isa", &FieldOffset)); | |||
3842 | EltTys.push_back(CreateMemberType(Unit, FType, "__forwarding", &FieldOffset)); | |||
3843 | FType = CGM.getContext().IntTy; | |||
3844 | EltTys.push_back(CreateMemberType(Unit, FType, "__flags", &FieldOffset)); | |||
3845 | EltTys.push_back(CreateMemberType(Unit, FType, "__size", &FieldOffset)); | |||
3846 | ||||
3847 | bool HasCopyAndDispose = CGM.getContext().BlockRequiresCopying(Type, VD); | |||
3848 | if (HasCopyAndDispose) { | |||
3849 | FType = CGM.getContext().getPointerType(CGM.getContext().VoidTy); | |||
3850 | EltTys.push_back( | |||
3851 | CreateMemberType(Unit, FType, "__copy_helper", &FieldOffset)); | |||
3852 | EltTys.push_back( | |||
3853 | CreateMemberType(Unit, FType, "__destroy_helper", &FieldOffset)); | |||
3854 | } | |||
3855 | bool HasByrefExtendedLayout; | |||
3856 | Qualifiers::ObjCLifetime Lifetime; | |||
3857 | if (CGM.getContext().getByrefLifetime(Type, Lifetime, | |||
3858 | HasByrefExtendedLayout) && | |||
3859 | HasByrefExtendedLayout) { | |||
3860 | FType = CGM.getContext().getPointerType(CGM.getContext().VoidTy); | |||
3861 | EltTys.push_back( | |||
3862 | CreateMemberType(Unit, FType, "__byref_variable_layout", &FieldOffset)); | |||
3863 | } | |||
3864 | ||||
3865 | CharUnits Align = CGM.getContext().getDeclAlign(VD); | |||
3866 | if (Align > CGM.getContext().toCharUnitsFromBits( | |||
3867 | CGM.getTarget().getPointerAlign(0))) { | |||
3868 | CharUnits FieldOffsetInBytes = | |||
3869 | CGM.getContext().toCharUnitsFromBits(FieldOffset); | |||
3870 | CharUnits AlignedOffsetInBytes = FieldOffsetInBytes.alignTo(Align); | |||
3871 | CharUnits NumPaddingBytes = AlignedOffsetInBytes - FieldOffsetInBytes; | |||
3872 | ||||
3873 | if (NumPaddingBytes.isPositive()) { | |||
3874 | llvm::APInt pad(32, NumPaddingBytes.getQuantity()); | |||
3875 | FType = CGM.getContext().getConstantArrayType( | |||
3876 | CGM.getContext().CharTy, pad, nullptr, ArrayType::Normal, 0); | |||
3877 | EltTys.push_back(CreateMemberType(Unit, FType, "", &FieldOffset)); | |||
3878 | } | |||
3879 | } | |||
3880 | ||||
3881 | FType = Type; | |||
3882 | llvm::DIType *WrappedTy = getOrCreateType(FType, Unit); | |||
3883 | FieldSize = CGM.getContext().getTypeSize(FType); | |||
3884 | FieldAlign = CGM.getContext().toBits(Align); | |||
3885 | ||||
3886 | *XOffset = FieldOffset; | |||
3887 | llvm::DIType *FieldTy = DBuilder.createMemberType( | |||
3888 | Unit, VD->getName(), Unit, 0, FieldSize, FieldAlign, FieldOffset, | |||
3889 | llvm::DINode::FlagZero, WrappedTy); | |||
3890 | EltTys.push_back(FieldTy); | |||
3891 | FieldOffset += FieldSize; | |||
3892 | ||||
3893 | llvm::DINodeArray Elements = DBuilder.getOrCreateArray(EltTys); | |||
3894 | return {DBuilder.createStructType(Unit, "", Unit, 0, FieldOffset, 0, | |||
3895 | llvm::DINode::FlagZero, nullptr, Elements), | |||
3896 | WrappedTy}; | |||
3897 | } | |||
3898 | ||||
3899 | llvm::DILocalVariable *CGDebugInfo::EmitDeclare(const VarDecl *VD, | |||
3900 | llvm::Value *Storage, | |||
3901 | llvm::Optional<unsigned> ArgNo, | |||
3902 | CGBuilderTy &Builder, | |||
3903 | const bool UsePointerValue) { | |||
3904 | assert(DebugKind >= codegenoptions::LimitedDebugInfo)((DebugKind >= codegenoptions::LimitedDebugInfo) ? static_cast <void> (0) : __assert_fail ("DebugKind >= codegenoptions::LimitedDebugInfo" , "/build/llvm-toolchain-snapshot-10~svn374877/tools/clang/lib/CodeGen/CGDebugInfo.cpp" , 3904, __PRETTY_FUNCTION__)); | |||
3905 | 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-10~svn374877/tools/clang/lib/CodeGen/CGDebugInfo.cpp" , 3905, __PRETTY_FUNCTION__)); | |||
3906 | if (VD->hasAttr<NoDebugAttr>()) | |||
3907 | return nullptr; | |||
3908 | ||||
3909 | bool Unwritten = | |||
3910 | VD->isImplicit() || (isa<Decl>(VD->getDeclContext()) && | |||
3911 | cast<Decl>(VD->getDeclContext())->isImplicit()); | |||
3912 | llvm::DIFile *Unit = nullptr; | |||
3913 | if (!Unwritten) | |||
3914 | Unit = getOrCreateFile(VD->getLocation()); | |||
3915 | llvm::DIType *Ty; | |||
3916 | uint64_t XOffset = 0; | |||
3917 | if (VD->hasAttr<BlocksAttr>()) | |||
3918 | Ty = EmitTypeForVarWithBlocksAttr(VD, &XOffset).WrappedType; | |||
3919 | else | |||
3920 | Ty = getOrCreateType(VD->getType(), Unit); | |||
3921 | ||||
3922 | // If there is no debug info for this type then do not emit debug info | |||
3923 | // for this variable. | |||
3924 | if (!Ty) | |||
3925 | return nullptr; | |||
3926 | ||||
3927 | // Get location information. | |||
3928 | unsigned Line = 0; | |||
3929 | unsigned Column = 0; | |||
3930 | if (!Unwritten) { | |||
3931 | Line = getLineNumber(VD->getLocation()); | |||
3932 | Column = getColumnNumber(VD->getLocation()); | |||
3933 | } | |||
3934 | SmallVector<int64_t, 13> Expr; | |||
3935 | llvm::DINode::DIFlags Flags = llvm::DINode::FlagZero; | |||
3936 | if (VD->isImplicit()) | |||
3937 | Flags |= llvm::DINode::FlagArtificial; | |||
3938 | ||||
3939 | auto Align = getDeclAlignIfRequired(VD, CGM.getContext()); | |||
3940 | ||||
3941 | unsigned AddressSpace = CGM.getContext().getTargetAddressSpace(VD->getType()); | |||
3942 | AppendAddressSpaceXDeref(AddressSpace, Expr); | |||
3943 | ||||
3944 | // If this is implicit parameter of CXXThis or ObjCSelf kind, then give it an | |||
3945 | // object pointer flag. | |||
3946 | if (const auto *IPD = dyn_cast<ImplicitParamDecl>(VD)) { | |||
3947 | if (IPD->getParameterKind() == ImplicitParamDecl::CXXThis || | |||
3948 | IPD->getParameterKind() == ImplicitParamDecl::ObjCSelf) | |||
3949 | Flags |= llvm::DINode::FlagObjectPointer; | |||
3950 | } | |||
3951 | ||||
3952 | // Note: Older versions of clang used to emit byval references with an extra | |||
3953 | // DW_OP_deref, because they referenced the IR arg directly instead of | |||
3954 | // referencing an alloca. Newer versions of LLVM don't treat allocas | |||
3955 | // differently from other function arguments when used in a dbg.declare. | |||
3956 | auto *Scope = cast<llvm::DIScope>(LexicalBlockStack.back()); | |||
3957 | StringRef Name = VD->getName(); | |||
3958 | if (!Name.empty()) { | |||
3959 | if (VD->hasAttr<BlocksAttr>()) { | |||
3960 | // Here, we need an offset *into* the alloca. | |||
3961 | CharUnits offset = CharUnits::fromQuantity(32); | |||
3962 | Expr.push_back(llvm::dwarf::DW_OP_plus_uconst); | |||
3963 | // offset of __forwarding field | |||
3964 | offset = CGM.getContext().toCharUnitsFromBits( | |||
3965 | CGM.getTarget().getPointerWidth(0)); | |||
3966 | Expr.push_back(offset.getQuantity()); | |||
3967 | Expr.push_back(llvm::dwarf::DW_OP_deref); | |||
3968 | Expr.push_back(llvm::dwarf::DW_OP_plus_uconst); | |||
3969 | // offset of x field | |||
3970 | offset = CGM.getContext().toCharUnitsFromBits(XOffset); | |||
3971 | Expr.push_back(offset.getQuantity()); | |||
3972 | } | |||
3973 | } else if (const auto *RT = dyn_cast<RecordType>(VD->getType())) { | |||
3974 | // If VD is an anonymous union then Storage represents value for | |||
3975 | // all union fields. | |||
3976 | const RecordDecl *RD = RT->getDecl(); | |||
3977 | if (RD->isUnion() && RD->isAnonymousStructOrUnion()) { | |||
3978 | // GDB has trouble finding local variables in anonymous unions, so we emit | |||
3979 | // artificial local variables for each of the members. | |||
3980 | // | |||
3981 | // FIXME: Remove this code as soon as GDB supports this. | |||
3982 | // The debug info verifier in LLVM operates based on the assumption that a | |||
3983 | // variable has the same size as its storage and we had to disable the | |||
3984 | // check for artificial variables. | |||
3985 | for (const auto *Field : RD->fields()) { | |||
3986 | llvm::DIType *FieldTy = getOrCreateType(Field->getType(), Unit); | |||
3987 | StringRef FieldName = Field->getName(); | |||
3988 | ||||
3989 | // Ignore unnamed fields. Do not ignore unnamed records. | |||
3990 | if (FieldName.empty() && !isa<RecordType>(Field->getType())) | |||
3991 | continue; | |||
3992 | ||||
3993 | // Use VarDecl's Tag, Scope and Line number. | |||
3994 | auto FieldAlign = getDeclAlignIfRequired(Field, CGM.getContext()); | |||
3995 | auto *D = DBuilder.createAutoVariable( | |||
3996 | Scope, FieldName, Unit, Line, FieldTy, CGM.getLangOpts().Optimize, | |||
3997 | Flags | llvm::DINode::FlagArtificial, FieldAlign); | |||
3998 | ||||
3999 | // Insert an llvm.dbg.declare into the current block. | |||
4000 | DBuilder.insertDeclare( | |||
4001 | Storage, D, DBuilder.createExpression(Expr), | |||
4002 | llvm::DebugLoc::get(Line, Column, Scope, CurInlinedAt), | |||
4003 | Builder.GetInsertBlock()); | |||
4004 | } | |||
4005 | } | |||
4006 | } | |||
4007 | ||||
4008 | // Clang stores the sret pointer provided by the caller in a static alloca. | |||
4009 | // Use DW_OP_deref to tell the debugger to load the pointer and treat it as | |||
4010 | // the address of the variable. | |||
4011 | if (UsePointerValue) { | |||
4012 | 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-10~svn374877/tools/clang/lib/CodeGen/CGDebugInfo.cpp" , 4014, __PRETTY_FUNCTION__)) | |||
4013 | 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-10~svn374877/tools/clang/lib/CodeGen/CGDebugInfo.cpp" , 4014, __PRETTY_FUNCTION__)) | |||
4014 | "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-10~svn374877/tools/clang/lib/CodeGen/CGDebugInfo.cpp" , 4014, __PRETTY_FUNCTION__)); | |||
4015 | Expr.push_back(llvm::dwarf::DW_OP_deref); | |||
4016 | } | |||
4017 | ||||
4018 | // Create the descriptor for the variable. | |||
4019 | auto *D = ArgNo ? DBuilder.createParameterVariable( | |||
4020 | Scope, Name, *ArgNo, Unit, Line, Ty, | |||
4021 | CGM.getLangOpts().Optimize, Flags) | |||
4022 | : DBuilder.createAutoVariable(Scope, Name, Unit, Line, Ty, | |||
4023 | CGM.getLangOpts().Optimize, | |||
4024 | Flags, Align); | |||
4025 | ||||
4026 | // Insert an llvm.dbg.declare into the current block. | |||
4027 | DBuilder.insertDeclare(Storage, D, DBuilder.createExpression(Expr), | |||
4028 | llvm::DebugLoc::get(Line, Column, Scope, CurInlinedAt), | |||
4029 | Builder.GetInsertBlock()); | |||
4030 | ||||
4031 | if (CGM.getCodeGenOpts().EnableDebugEntryValues && ArgNo) { | |||
4032 | if (auto *PD = dyn_cast<ParmVarDecl>(VD)) | |||
4033 | ParamCache[PD].reset(D); | |||
4034 | } | |||
4035 | ||||
4036 | return D; | |||
4037 | } | |||
4038 | ||||
4039 | llvm::DILocalVariable * | |||
4040 | CGDebugInfo::EmitDeclareOfAutoVariable(const VarDecl *VD, llvm::Value *Storage, | |||
4041 | CGBuilderTy &Builder, | |||
4042 | const bool UsePointerValue) { | |||
4043 | assert(DebugKind >= codegenoptions::LimitedDebugInfo)((DebugKind >= codegenoptions::LimitedDebugInfo) ? static_cast <void> (0) : __assert_fail ("DebugKind >= codegenoptions::LimitedDebugInfo" , "/build/llvm-toolchain-snapshot-10~svn374877/tools/clang/lib/CodeGen/CGDebugInfo.cpp" , 4043, __PRETTY_FUNCTION__)); | |||
4044 | return EmitDeclare(VD, Storage, llvm::None, Builder, UsePointerValue); | |||
4045 | } | |||
4046 | ||||
4047 | void CGDebugInfo::EmitLabel(const LabelDecl *D, CGBuilderTy &Builder) { | |||
4048 | assert(DebugKind >= codegenoptions::LimitedDebugInfo)((DebugKind >= codegenoptions::LimitedDebugInfo) ? static_cast <void> (0) : __assert_fail ("DebugKind >= codegenoptions::LimitedDebugInfo" , "/build/llvm-toolchain-snapshot-10~svn374877/tools/clang/lib/CodeGen/CGDebugInfo.cpp" , 4048, __PRETTY_FUNCTION__)); | |||
4049 | 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-10~svn374877/tools/clang/lib/CodeGen/CGDebugInfo.cpp" , 4049, __PRETTY_FUNCTION__)); | |||
4050 | ||||
4051 | if (D->hasAttr<NoDebugAttr>()) | |||
4052 | return; | |||
4053 | ||||
4054 | auto *Scope = cast<llvm::DIScope>(LexicalBlockStack.back()); | |||
4055 | llvm::DIFile *Unit = getOrCreateFile(D->getLocation()); | |||
4056 | ||||
4057 | // Get location information. | |||
4058 | unsigned Line = getLineNumber(D->getLocation()); | |||
4059 | unsigned Column = getColumnNumber(D->getLocation()); | |||
4060 | ||||
4061 | StringRef Name = D->getName(); | |||
4062 | ||||
4063 | // Create the descriptor for the label. | |||
4064 | auto *L = | |||
4065 | DBuilder.createLabel(Scope, Name, Unit, Line, CGM.getLangOpts().Optimize); | |||
4066 | ||||
4067 | // Insert an llvm.dbg.label into the current block. | |||
4068 | DBuilder.insertLabel(L, | |||
4069 | llvm::DebugLoc::get(Line, Column, Scope, CurInlinedAt), | |||
4070 | Builder.GetInsertBlock()); | |||
4071 | } | |||
4072 | ||||
4073 | llvm::DIType *CGDebugInfo::CreateSelfType(const QualType &QualTy, | |||
4074 | llvm::DIType *Ty) { | |||
4075 | llvm::DIType *CachedTy = getTypeOrNull(QualTy); | |||
4076 | if (CachedTy) | |||
4077 | Ty = CachedTy; | |||
4078 | return DBuilder.createObjectPointerType(Ty); | |||
4079 | } | |||
4080 | ||||
4081 | void CGDebugInfo::EmitDeclareOfBlockDeclRefVariable( | |||
4082 | const VarDecl *VD, llvm::Value *Storage, CGBuilderTy &Builder, | |||
4083 | const CGBlockInfo &blockInfo, llvm::Instruction *InsertPoint) { | |||
4084 | assert(DebugKind >= codegenoptions::LimitedDebugInfo)((DebugKind >= codegenoptions::LimitedDebugInfo) ? static_cast <void> (0) : __assert_fail ("DebugKind >= codegenoptions::LimitedDebugInfo" , "/build/llvm-toolchain-snapshot-10~svn374877/tools/clang/lib/CodeGen/CGDebugInfo.cpp" , 4084, __PRETTY_FUNCTION__)); | |||
4085 | 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-10~svn374877/tools/clang/lib/CodeGen/CGDebugInfo.cpp" , 4085, __PRETTY_FUNCTION__)); | |||
4086 | ||||
4087 | if (Builder.GetInsertBlock() == nullptr) | |||
4088 | return; | |||
4089 | if (VD->hasAttr<NoDebugAttr>()) | |||
4090 | return; | |||
4091 | ||||
4092 | bool isByRef = VD->hasAttr<BlocksAttr>(); | |||
4093 | ||||
4094 | uint64_t XOffset = 0; | |||
4095 | llvm::DIFile *Unit = getOrCreateFile(VD->getLocation()); | |||
4096 | llvm::DIType *Ty; | |||
4097 | if (isByRef) | |||
4098 | Ty = EmitTypeForVarWithBlocksAttr(VD, &XOffset).WrappedType; | |||
4099 | else | |||
4100 | Ty = getOrCreateType(VD->getType(), Unit); | |||
4101 | ||||
4102 | // Self is passed along as an implicit non-arg variable in a | |||
4103 | // block. Mark it as the object pointer. | |||
4104 | if (const auto *IPD = dyn_cast<ImplicitParamDecl>(VD)) | |||
4105 | if (IPD->getParameterKind() == ImplicitParamDecl::ObjCSelf) | |||
4106 | Ty = CreateSelfType(VD->getType(), Ty); | |||
4107 | ||||
4108 | // Get location information. | |||
4109 | unsigned Line = getLineNumber(VD->getLocation()); | |||
4110 | unsigned Column = getColumnNumber(VD->getLocation()); | |||
4111 | ||||
4112 | const llvm::DataLayout &target = CGM.getDataLayout(); | |||
4113 | ||||
4114 | CharUnits offset = CharUnits::fromQuantity( | |||
4115 | target.getStructLayout(blockInfo.StructureType) | |||
4116 | ->getElementOffset(blockInfo.getCapture(VD).getIndex())); | |||
4117 | ||||
4118 | SmallVector<int64_t, 9> addr; | |||
4119 | addr.push_back(llvm::dwarf::DW_OP_deref); | |||
4120 | addr.push_back(llvm::dwarf::DW_OP_plus_uconst); | |||
4121 | addr.push_back(offset.getQuantity()); | |||
4122 | if (isByRef) { | |||
4123 | addr.push_back(llvm::dwarf::DW_OP_deref); | |||
4124 | addr.push_back(llvm::dwarf::DW_OP_plus_uconst); | |||
4125 | // offset of __forwarding field | |||
4126 | offset = | |||
4127 | CGM.getContext().toCharUnitsFromBits(target.getPointerSizeInBits(0)); | |||
4128 | addr.push_back(offset.getQuantity()); | |||
4129 | addr.push_back(llvm::dwarf::DW_OP_deref); | |||
4130 | addr.push_back(llvm::dwarf::DW_OP_plus_uconst); | |||
4131 | // offset of x field | |||
4132 | offset = CGM.getContext().toCharUnitsFromBits(XOffset); | |||
4133 | addr.push_back(offset.getQuantity()); | |||
4134 | } | |||
4135 | ||||
4136 | // Create the descriptor for the variable. | |||
4137 | auto Align = getDeclAlignIfRequired(VD, CGM.getContext()); | |||
4138 | auto *D = DBuilder.createAutoVariable( | |||
4139 | cast<llvm::DILocalScope>(LexicalBlockStack.back()), VD->getName(), Unit, | |||
4140 | Line, Ty, false, llvm::DINode::FlagZero, Align); | |||
4141 | ||||
4142 | // Insert an llvm.dbg.declare into the current block. | |||
4143 | auto DL = | |||
4144 | llvm::DebugLoc::get(Line, Column, LexicalBlockStack.back(), CurInlinedAt); | |||
4145 | auto *Expr = DBuilder.createExpression(addr); | |||
4146 | if (InsertPoint) | |||
4147 | DBuilder.insertDeclare(Storage, D, Expr, DL, InsertPoint); | |||
4148 | else | |||
4149 | DBuilder.insertDeclare(Storage, D, Expr, DL, Builder.GetInsertBlock()); | |||
4150 | } | |||
4151 | ||||
4152 | void CGDebugInfo::EmitDeclareOfArgVariable(const VarDecl *VD, llvm::Value *AI, | |||
4153 | unsigned ArgNo, | |||
4154 | CGBuilderTy &Builder) { | |||
4155 | assert(DebugKind >= codegenoptions::LimitedDebugInfo)((DebugKind >= codegenoptions::LimitedDebugInfo) ? static_cast <void> (0) : __assert_fail ("DebugKind >= codegenoptions::LimitedDebugInfo" , "/build/llvm-toolchain-snapshot-10~svn374877/tools/clang/lib/CodeGen/CGDebugInfo.cpp" , 4155, __PRETTY_FUNCTION__)); | |||
4156 | EmitDeclare(VD, AI, ArgNo, Builder); | |||
4157 | } | |||
4158 | ||||
4159 | namespace { | |||
4160 | struct BlockLayoutChunk { | |||
4161 | uint64_t OffsetInBits; | |||
4162 | const BlockDecl::Capture *Capture; | |||
4163 | }; | |||
4164 | bool operator<(const BlockLayoutChunk &l, const BlockLayoutChunk &r) { | |||
4165 | return l.OffsetInBits < r.OffsetInBits; | |||
4166 | } | |||
4167 | } // namespace | |||
4168 | ||||
4169 | void CGDebugInfo::collectDefaultFieldsForBlockLiteralDeclare( | |||
4170 | const CGBlockInfo &Block, const ASTContext &Context, SourceLocation Loc, | |||
4171 | const llvm::StructLayout &BlockLayout, llvm::DIFile *Unit, | |||
4172 | SmallVectorImpl<llvm::Metadata *> &Fields) { | |||
4173 | // Blocks in OpenCL have unique constraints which make the standard fields | |||
4174 | // redundant while requiring size and align fields for enqueue_kernel. See | |||
4175 | // initializeForBlockHeader in CGBlocks.cpp | |||
4176 | if (CGM.getLangOpts().OpenCL) { | |||
4177 | Fields.push_back(createFieldType("__size", Context.IntTy, Loc, AS_public, | |||
4178 | BlockLayout.getElementOffsetInBits(0), | |||
4179 | Unit, Unit)); | |||
4180 | Fields.push_back(createFieldType("__align", Context.IntTy, Loc, AS_public, | |||
4181 | BlockLayout.getElementOffsetInBits(1), | |||
4182 | Unit, Unit)); | |||
4183 | } else { | |||
4184 | Fields.push_back(createFieldType("__isa", Context.VoidPtrTy, Loc, AS_public, | |||
4185 | BlockLayout.getElementOffsetInBits(0), | |||
4186 | Unit, Unit)); | |||
4187 | Fields.push_back(createFieldType("__flags", Context.IntTy, Loc, AS_public, | |||
4188 | BlockLayout.getElementOffsetInBits(1), | |||
4189 | Unit, Unit)); | |||
4190 | Fields.push_back( | |||
4191 | createFieldType("__reserved", Context.IntTy, Loc, AS_public, | |||
4192 | BlockLayout.getElementOffsetInBits(2), Unit, Unit)); | |||
4193 | auto *FnTy = Block.getBlockExpr()->getFunctionType(); | |||
4194 | auto FnPtrType = CGM.getContext().getPointerType(FnTy->desugar()); | |||
4195 | Fields.push_back(createFieldType("__FuncPtr", FnPtrType, Loc, AS_public, | |||
4196 | BlockLayout.getElementOffsetInBits(3), | |||
4197 | Unit, Unit)); | |||
4198 | Fields.push_back(createFieldType( | |||
4199 | "__descriptor", | |||
4200 | Context.getPointerType(Block.NeedsCopyDispose | |||
4201 | ? Context.getBlockDescriptorExtendedType() | |||
4202 | : Context.getBlockDescriptorType()), | |||
4203 | Loc, AS_public, BlockLayout.getElementOffsetInBits(4), Unit, Unit)); | |||
4204 | } | |||
4205 | } | |||
4206 | ||||
4207 | void CGDebugInfo::EmitDeclareOfBlockLiteralArgVariable(const CGBlockInfo &block, | |||
4208 | StringRef Name, | |||
4209 | unsigned ArgNo, | |||
4210 | llvm::AllocaInst *Alloca, | |||
4211 | CGBuilderTy &Builder) { | |||
4212 | assert(DebugKind >= codegenoptions::LimitedDebugInfo)((DebugKind >= codegenoptions::LimitedDebugInfo) ? static_cast <void> (0) : __assert_fail ("DebugKind >= codegenoptions::LimitedDebugInfo" , "/build/llvm-toolchain-snapshot-10~svn374877/tools/clang/lib/CodeGen/CGDebugInfo.cpp" , 4212, __PRETTY_FUNCTION__)); | |||
4213 | ASTContext &C = CGM.getContext(); | |||
4214 | const BlockDecl *blockDecl = block.getBlockDecl(); | |||
4215 | ||||
4216 | // Collect some general information about the block's location. | |||
4217 | SourceLocation loc = blockDecl->getCaretLocation(); | |||
4218 | llvm::DIFile *tunit = getOrCreateFile(loc); | |||
4219 | unsigned line = getLineNumber(loc); | |||
4220 | unsigned column = getColumnNumber(loc); | |||
4221 | ||||
4222 | // Build the debug-info type for the block literal. | |||
4223 | getDeclContextDescriptor(blockDecl); | |||
4224 | ||||
4225 | const llvm::StructLayout *blockLayout = | |||
4226 | CGM.getDataLayout().getStructLayout(block.StructureType); | |||
4227 | ||||
4228 | SmallVector<llvm::Metadata *, 16> fields; | |||
4229 | collectDefaultFieldsForBlockLiteralDeclare(block, C, loc, *blockLayout, tunit, | |||
4230 | fields); | |||
4231 | ||||
4232 | // We want to sort the captures by offset, not because DWARF | |||
4233 | // requires this, but because we're paranoid about debuggers. | |||
4234 | SmallVector<BlockLayoutChunk, 8> chunks; | |||
4235 | ||||
4236 | // 'this' capture. | |||
4237 | if (blockDecl->capturesCXXThis()) { | |||
4238 | BlockLayoutChunk chunk; | |||
4239 | chunk.OffsetInBits = | |||
4240 | blockLayout->getElementOffsetInBits(block.CXXThisIndex); | |||
4241 | chunk.Capture = nullptr; | |||
4242 | chunks.push_back(chunk); | |||
4243 | } | |||
4244 | ||||
4245 | // Variable captures. | |||
4246 | for (const auto &capture : blockDecl->captures()) { | |||
4247 | const VarDecl *variable = capture.getVariable(); | |||
4248 | const CGBlockInfo::Capture &captureInfo = block.getCapture(variable); | |||
4249 | ||||
4250 | // Ignore constant captures. | |||
4251 | if (captureInfo.isConstant()) | |||
4252 | continue; | |||
4253 | ||||
4254 | BlockLayoutChunk chunk; | |||
4255 | chunk.OffsetInBits = | |||
4256 | blockLayout->getElementOffsetInBits(captureInfo.getIndex()); | |||
4257 | chunk.Capture = &capture; | |||
4258 | chunks.push_back(chunk); | |||
4259 | } | |||
4260 | ||||
4261 | // Sort by offset. | |||
4262 | llvm::array_pod_sort(chunks.begin(), chunks.end()); | |||
4263 | ||||
4264 | for (const BlockLayoutChunk &Chunk : chunks) { | |||
4265 | uint64_t offsetInBits = Chunk.OffsetInBits; | |||
4266 | const BlockDecl::Capture *capture = Chunk.Capture; | |||
4267 | ||||
4268 | // If we have a null capture, this must be the C++ 'this' capture. | |||
4269 | if (!capture) { | |||
4270 | QualType type; | |||
4271 | if (auto *Method = | |||
4272 | cast_or_null<CXXMethodDecl>(blockDecl->getNonClosureContext())) | |||
4273 | type = Method->getThisType(); | |||
4274 | else if (auto *RDecl = dyn_cast<CXXRecordDecl>(blockDecl->getParent())) | |||
4275 | type = QualType(RDecl->getTypeForDecl(), 0); | |||
4276 | else | |||
4277 | llvm_unreachable("unexpected block declcontext")::llvm::llvm_unreachable_internal("unexpected block declcontext" , "/build/llvm-toolchain-snapshot-10~svn374877/tools/clang/lib/CodeGen/CGDebugInfo.cpp" , 4277); | |||
4278 | ||||
4279 | fields.push_back(createFieldType("this", type, loc, AS_public, | |||
4280 | offsetInBits, tunit, tunit)); | |||
4281 | continue; | |||
4282 | } | |||
4283 | ||||
4284 | const VarDecl *variable = capture->getVariable(); | |||
4285 | StringRef name = variable->getName(); | |||
4286 | ||||
4287 | llvm::DIType *fieldType; | |||
4288 | if (capture->isByRef()) { | |||
4289 | TypeInfo PtrInfo = C.getTypeInfo(C.VoidPtrTy); | |||
4290 | auto Align = PtrInfo.AlignIsRequired ? PtrInfo.Align : 0; | |||
4291 | // FIXME: This recomputes the layout of the BlockByRefWrapper. | |||
4292 | uint64_t xoffset; | |||
4293 | fieldType = | |||
4294 | EmitTypeForVarWithBlocksAttr(variable, &xoffset).BlockByRefWrapper; | |||
4295 | fieldType = DBuilder.createPointerType(fieldType, PtrInfo.Width); | |||
4296 | fieldType = DBuilder.createMemberType(tunit, name, tunit, line, | |||
4297 | PtrInfo.Width, Align, offsetInBits, | |||
4298 | llvm::DINode::FlagZero, fieldType); | |||
4299 | } else { | |||
4300 | auto Align = getDeclAlignIfRequired(variable, CGM.getContext()); | |||
4301 | fieldType = createFieldType(name, variable->getType(), loc, AS_public, | |||
4302 | offsetInBits, Align, tunit, tunit); | |||
4303 | } | |||
4304 | fields.push_back(fieldType); | |||
4305 | } | |||
4306 | ||||
4307 | SmallString<36> typeName; | |||
4308 | llvm::raw_svector_ostream(typeName) | |||
4309 | << "__block_literal_" << CGM.getUniqueBlockCount(); | |||
4310 | ||||
4311 | llvm::DINodeArray fieldsArray = DBuilder.getOrCreateArray(fields); | |||
4312 | ||||
4313 | llvm::DIType *type = | |||
4314 | DBuilder.createStructType(tunit, typeName.str(), tunit, line, | |||
4315 | CGM.getContext().toBits(block.BlockSize), 0, | |||
4316 | llvm::DINode::FlagZero, nullptr, fieldsArray); | |||
4317 | type = DBuilder.createPointerType(type, CGM.PointerWidthInBits); | |||
4318 | ||||
4319 | // Get overall information about the block. | |||
4320 | llvm::DINode::DIFlags flags = llvm::DINode::FlagArtificial; | |||
4321 | auto *scope = cast<llvm::DILocalScope>(LexicalBlockStack.back()); | |||
4322 | ||||
4323 | // Create the descriptor for the parameter. | |||
4324 | auto *debugVar = DBuilder.createParameterVariable( | |||
4325 | scope, Name, ArgNo, tunit, line, type, CGM.getLangOpts().Optimize, flags); | |||
4326 | ||||
4327 | // Insert an llvm.dbg.declare into the current block. | |||
4328 | DBuilder.insertDeclare(Alloca, debugVar, DBuilder.createExpression(), | |||
4329 | llvm::DebugLoc::get(line, column, scope, CurInlinedAt), | |||
4330 | Builder.GetInsertBlock()); | |||
4331 | } | |||
4332 | ||||
4333 | llvm::DIDerivedType * | |||
4334 | CGDebugInfo::getOrCreateStaticDataMemberDeclarationOrNull(const VarDecl *D) { | |||
4335 | if (!D || !D->isStaticDataMember()) | |||
4336 | return nullptr; | |||
4337 | ||||
4338 | auto MI = StaticDataMemberCache.find(D->getCanonicalDecl()); | |||
4339 | if (MI != StaticDataMemberCache.end()) { | |||
4340 | 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-10~svn374877/tools/clang/lib/CodeGen/CGDebugInfo.cpp" , 4340, __PRETTY_FUNCTION__)); | |||
4341 | return MI->second; | |||
4342 | } | |||
4343 | ||||
4344 | // If the member wasn't found in the cache, lazily construct and add it to the | |||
4345 | // type (used when a limited form of the type is emitted). | |||
4346 | auto DC = D->getDeclContext(); | |||
4347 | auto *Ctxt = cast<llvm::DICompositeType>(getDeclContextDescriptor(D)); | |||
4348 | return CreateRecordStaticField(D, Ctxt, cast<RecordDecl>(DC)); | |||
4349 | } | |||
4350 | ||||
4351 | llvm::DIGlobalVariableExpression *CGDebugInfo::CollectAnonRecordDecls( | |||
4352 | const RecordDecl *RD, llvm::DIFile *Unit, unsigned LineNo, | |||
4353 | StringRef LinkageName, llvm::GlobalVariable *Var, llvm::DIScope *DContext) { | |||
4354 | llvm::DIGlobalVariableExpression *GVE = nullptr; | |||
4355 | ||||
4356 | for (const auto *Field : RD->fields()) { | |||
4357 | llvm::DIType *FieldTy = getOrCreateType(Field->getType(), Unit); | |||
4358 | StringRef FieldName = Field->getName(); | |||
4359 | ||||
4360 | // Ignore unnamed fields, but recurse into anonymous records. | |||
4361 | if (FieldName.empty()) { | |||
4362 | if (const auto *RT = dyn_cast<RecordType>(Field->getType())) | |||
4363 | GVE = CollectAnonRecordDecls(RT->getDecl(), Unit, LineNo, LinkageName, | |||
4364 | Var, DContext); | |||
4365 | continue; | |||
4366 | } | |||
4367 | // Use VarDecl's Tag, Scope and Line number. | |||
4368 | GVE = DBuilder.createGlobalVariableExpression( | |||
4369 | DContext, FieldName, LinkageName, Unit, LineNo, FieldTy, | |||
4370 | Var->hasLocalLinkage()); | |||
4371 | Var->addDebugInfo(GVE); | |||
4372 | } | |||
4373 | return GVE; | |||
4374 | } | |||
4375 | ||||
4376 | void CGDebugInfo::EmitGlobalVariable(llvm::GlobalVariable *Var, | |||
4377 | const VarDecl *D) { | |||
4378 | assert(DebugKind >= codegenoptions::LimitedDebugInfo)((DebugKind >= codegenoptions::LimitedDebugInfo) ? static_cast <void> (0) : __assert_fail ("DebugKind >= codegenoptions::LimitedDebugInfo" , "/build/llvm-toolchain-snapshot-10~svn374877/tools/clang/lib/CodeGen/CGDebugInfo.cpp" , 4378, __PRETTY_FUNCTION__)); | |||
4379 | if (D->hasAttr<NoDebugAttr>()) | |||
4380 | return; | |||
4381 | ||||
4382 | // If we already created a DIGlobalVariable for this declaration, just attach | |||
4383 | // it to the llvm::GlobalVariable. | |||
4384 | auto Cached = DeclCache.find(D->getCanonicalDecl()); | |||
4385 | if (Cached != DeclCache.end()) | |||
4386 | return Var->addDebugInfo( | |||
4387 | cast<llvm::DIGlobalVariableExpression>(Cached->second)); | |||
4388 | ||||
4389 | // Create global variable debug descriptor. | |||
4390 | llvm::DIFile *Unit = nullptr; | |||
4391 | llvm::DIScope *DContext = nullptr; | |||
4392 | unsigned LineNo; | |||
4393 | StringRef DeclName, LinkageName; | |||
4394 | QualType T; | |||
4395 | llvm::MDTuple *TemplateParameters = nullptr; | |||
4396 | collectVarDeclProps(D, Unit, LineNo, T, DeclName, LinkageName, | |||
4397 | TemplateParameters, DContext); | |||
4398 | ||||
4399 | // Attempt to store one global variable for the declaration - even if we | |||
4400 | // emit a lot of fields. | |||
4401 | llvm::DIGlobalVariableExpression *GVE = nullptr; | |||
4402 | ||||
4403 | // If this is an anonymous union then we'll want to emit a global | |||
4404 | // variable for each member of the anonymous union so that it's possible | |||
4405 | // to find the name of any field in the union. | |||
4406 | if (T->isUnionType() && DeclName.empty()) { | |||
4407 | const RecordDecl *RD = T->castAs<RecordType>()->getDecl(); | |||
4408 | 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-10~svn374877/tools/clang/lib/CodeGen/CGDebugInfo.cpp" , 4409, __PRETTY_FUNCTION__)) | |||
4409 | "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-10~svn374877/tools/clang/lib/CodeGen/CGDebugInfo.cpp" , 4409, __PRETTY_FUNCTION__)); | |||
4410 | GVE = CollectAnonRecordDecls(RD, Unit, LineNo, LinkageName, Var, DContext); | |||
4411 | } else { | |||
4412 | auto Align = getDeclAlignIfRequired(D, CGM.getContext()); | |||
4413 | ||||
4414 | SmallVector<int64_t, 4> Expr; | |||
4415 | unsigned AddressSpace = | |||
4416 | CGM.getContext().getTargetAddressSpace(D->getType()); | |||
4417 | if (CGM.getLangOpts().CUDA && CGM.getLangOpts().CUDAIsDevice) { | |||
4418 | if (D->hasAttr<CUDASharedAttr>()) | |||
4419 | AddressSpace = | |||
4420 | CGM.getContext().getTargetAddressSpace(LangAS::cuda_shared); | |||
4421 | else if (D->hasAttr<CUDAConstantAttr>()) | |||
4422 | AddressSpace = | |||
4423 | CGM.getContext().getTargetAddressSpace(LangAS::cuda_constant); | |||
4424 | } | |||
4425 | AppendAddressSpaceXDeref(AddressSpace, Expr); | |||
4426 | ||||
4427 | GVE = DBuilder.createGlobalVariableExpression( | |||
4428 | DContext, DeclName, LinkageName, Unit, LineNo, getOrCreateType(T, Unit), | |||
4429 | Var->hasLocalLinkage(), | |||
4430 | Expr.empty() ? nullptr : DBuilder.createExpression(Expr), | |||
4431 | getOrCreateStaticDataMemberDeclarationOrNull(D), TemplateParameters, | |||
4432 | Align); | |||
4433 | Var->addDebugInfo(GVE); | |||
4434 | } | |||
4435 | DeclCache[D->getCanonicalDecl()].reset(GVE); | |||
4436 | } | |||
4437 | ||||
4438 | void CGDebugInfo::EmitGlobalVariable(const ValueDecl *VD, const APValue &Init) { | |||
4439 | assert(DebugKind >= codegenoptions::LimitedDebugInfo)((DebugKind >= codegenoptions::LimitedDebugInfo) ? static_cast <void> (0) : __assert_fail ("DebugKind >= codegenoptions::LimitedDebugInfo" , "/build/llvm-toolchain-snapshot-10~svn374877/tools/clang/lib/CodeGen/CGDebugInfo.cpp" , 4439, __PRETTY_FUNCTION__)); | |||
4440 | if (VD->hasAttr<NoDebugAttr>()) | |||
4441 | return; | |||
4442 | auto Align = getDeclAlignIfRequired(VD, CGM.getContext()); | |||
4443 | // Create the descriptor for the variable. | |||
4444 | llvm::DIFile *Unit = getOrCreateFile(VD->getLocation()); | |||
4445 | StringRef Name = VD->getName(); | |||
4446 | llvm::DIType *Ty = getOrCreateType(VD->getType(), Unit); | |||
4447 | ||||
4448 | if (const auto *ECD = dyn_cast<EnumConstantDecl>(VD)) { | |||
4449 | const auto *ED = cast<EnumDecl>(ECD->getDeclContext()); | |||
4450 | 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-10~svn374877/tools/clang/lib/CodeGen/CGDebugInfo.cpp" , 4450, __PRETTY_FUNCTION__)); | |||
4451 | ||||
4452 | if (CGM.getCodeGenOpts().EmitCodeView) { | |||
4453 | // If CodeView, emit enums as global variables, unless they are defined | |||
4454 | // inside a class. We do this because MSVC doesn't emit S_CONSTANTs for | |||
4455 | // enums in classes, and because it is difficult to attach this scope | |||
4456 | // information to the global variable. | |||
4457 | if (isa<RecordDecl>(ED->getDeclContext())) | |||
4458 | return; | |||
4459 | } else { | |||
4460 | // If not CodeView, emit DW_TAG_enumeration_type if necessary. For | |||
4461 | // example: for "enum { ZERO };", a DW_TAG_enumeration_type is created the | |||
4462 | // first time `ZERO` is referenced in a function. | |||
4463 | llvm::DIType *EDTy = | |||
4464 | getOrCreateType(QualType(ED->getTypeForDecl(), 0), Unit); | |||
4465 | 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-10~svn374877/tools/clang/lib/CodeGen/CGDebugInfo.cpp" , 4465, __PRETTY_FUNCTION__)); | |||
4466 | (void)EDTy; | |||
4467 | return; | |||
4468 | } | |||
4469 | } | |||
4470 | ||||
4471 | llvm::DIScope *DContext = nullptr; | |||
4472 | ||||
4473 | // Do not emit separate definitions for function local consts. | |||
4474 | if (isa<FunctionDecl>(VD->getDeclContext())) | |||
4475 | return; | |||
4476 | ||||
4477 | // Emit definition for static members in CodeView. | |||
4478 | VD = cast<ValueDecl>(VD->getCanonicalDecl()); | |||
4479 | auto *VarD = dyn_cast<VarDecl>(VD); | |||
4480 | if (VarD && VarD->isStaticDataMember()) { | |||
4481 | auto *RD = cast<RecordDecl>(VarD->getDeclContext()); | |||
4482 | getDeclContextDescriptor(VarD); | |||
4483 | // Ensure that the type is retained even though it's otherwise unreferenced. | |||
4484 | // | |||
4485 | // FIXME: This is probably unnecessary, since Ty should reference RD | |||
4486 | // through its scope. | |||
4487 | RetainedTypes.push_back( | |||
4488 | CGM.getContext().getRecordType(RD).getAsOpaquePtr()); | |||
4489 | ||||
4490 | if (!CGM.getCodeGenOpts().EmitCodeView) | |||
4491 | return; | |||
4492 | ||||
4493 | // Use the global scope for static members. | |||
4494 | DContext = getContextDescriptor( | |||
4495 | cast<Decl>(CGM.getContext().getTranslationUnitDecl()), TheCU); | |||
4496 | } else { | |||
4497 | DContext = getDeclContextDescriptor(VD); | |||
4498 | } | |||
4499 | ||||
4500 | auto &GV = DeclCache[VD]; | |||
4501 | if (GV) | |||
4502 | return; | |||
4503 | llvm::DIExpression *InitExpr = nullptr; | |||
4504 | if (CGM.getContext().getTypeSize(VD->getType()) <= 64) { | |||
4505 | // FIXME: Add a representation for integer constants wider than 64 bits. | |||
4506 | if (Init.isInt()) | |||
4507 | InitExpr = | |||
4508 | DBuilder.createConstantValueExpression(Init.getInt().getExtValue()); | |||
4509 | else if (Init.isFloat()) | |||
4510 | InitExpr = DBuilder.createConstantValueExpression( | |||
4511 | Init.getFloat().bitcastToAPInt().getZExtValue()); | |||
4512 | } | |||
4513 | ||||
4514 | llvm::MDTuple *TemplateParameters = nullptr; | |||
4515 | ||||
4516 | if (isa<VarTemplateSpecializationDecl>(VD)) | |||
4517 | if (VarD) { | |||
4518 | llvm::DINodeArray parameterNodes = CollectVarTemplateParams(VarD, &*Unit); | |||
4519 | TemplateParameters = parameterNodes.get(); | |||
4520 | } | |||
4521 | ||||
4522 | GV.reset(DBuilder.createGlobalVariableExpression( | |||
4523 | DContext, Name, StringRef(), Unit, getLineNumber(VD->getLocation()), Ty, | |||
4524 | true, InitExpr, getOrCreateStaticDataMemberDeclarationOrNull(VarD), | |||
4525 | TemplateParameters, Align)); | |||
4526 | } | |||
4527 | ||||
4528 | llvm::DIScope *CGDebugInfo::getCurrentContextDescriptor(const Decl *D) { | |||
4529 | if (!LexicalBlockStack.empty()) | |||
4530 | return LexicalBlockStack.back(); | |||
4531 | llvm::DIScope *Mod = getParentModuleOrNull(D); | |||
4532 | return getContextDescriptor(D, Mod ? Mod : TheCU); | |||
4533 | } | |||
4534 | ||||
4535 | void CGDebugInfo::EmitUsingDirective(const UsingDirectiveDecl &UD) { | |||
4536 | if (CGM.getCodeGenOpts().getDebugInfo() < codegenoptions::LimitedDebugInfo) | |||
4537 | return; | |||
4538 | const NamespaceDecl *NSDecl = UD.getNominatedNamespace(); | |||
4539 | if (!NSDecl->isAnonymousNamespace() || | |||
4540 | CGM.getCodeGenOpts().DebugExplicitImport) { | |||
4541 | auto Loc = UD.getLocation(); | |||
4542 | DBuilder.createImportedModule( | |||
4543 | getCurrentContextDescriptor(cast<Decl>(UD.getDeclContext())), | |||
4544 | getOrCreateNamespace(NSDecl), getOrCreateFile(Loc), getLineNumber(Loc)); | |||
4545 | } | |||
4546 | } | |||
4547 | ||||
4548 | void CGDebugInfo::EmitUsingDecl(const UsingDecl &UD) { | |||
4549 | if (CGM.getCodeGenOpts().getDebugInfo() < codegenoptions::LimitedDebugInfo) | |||
| ||||
4550 | return; | |||
4551 | 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-10~svn374877/tools/clang/lib/CodeGen/CGDebugInfo.cpp" , 4552, __PRETTY_FUNCTION__)) | |||
4552 | "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-10~svn374877/tools/clang/lib/CodeGen/CGDebugInfo.cpp" , 4552, __PRETTY_FUNCTION__)); | |||
4553 | // Emitting one decl is sufficient - debuggers can detect that this is an | |||
4554 | // overloaded name & provide lookup for all the overloads. | |||
4555 | const UsingShadowDecl &USD = **UD.shadow_begin(); | |||
4556 | ||||
4557 | // FIXME: Skip functions with undeduced auto return type for now since we | |||
4558 | // don't currently have the plumbing for separate declarations & definitions | |||
4559 | // of free functions and mismatched types (auto in the declaration, concrete | |||
4560 | // return type in the definition) | |||
4561 | if (const auto *FD
| |||
4562 | if (const auto *AT = | |||
4563 | FD->getType()->castAs<FunctionProtoType>()->getContainedAutoType()) | |||
4564 | if (AT->getDeducedType().isNull()) | |||
4565 | return; | |||
4566 | if (llvm::DINode *Target = | |||
4567 | getDeclarationOrDefinition(USD.getUnderlyingDecl())) { | |||
4568 | auto Loc = USD.getLocation(); | |||
4569 | DBuilder.createImportedDeclaration( | |||
4570 | getCurrentContextDescriptor(cast<Decl>(USD.getDeclContext())), Target, | |||
4571 | getOrCreateFile(Loc), getLineNumber(Loc)); | |||
4572 | } | |||
4573 | } | |||
4574 | ||||
4575 | void CGDebugInfo::EmitImportDecl(const ImportDecl &ID) { | |||
4576 | if (CGM.getCodeGenOpts().getDebuggerTuning() != llvm::DebuggerKind::LLDB) | |||
4577 | return; | |||
4578 | if (Module *M = ID.getImportedModule()) { | |||
4579 | auto Info = ExternalASTSource::ASTSourceDescriptor(*M); | |||
4580 | auto Loc = ID.getLocation(); | |||
4581 | DBuilder.createImportedDeclaration( | |||
4582 | getCurrentContextDescriptor(cast<Decl>(ID.getDeclContext())), | |||
4583 | getOrCreateModuleRef(Info, DebugTypeExtRefs), getOrCreateFile(Loc), | |||
4584 | getLineNumber(Loc)); | |||
4585 | } | |||
4586 | } | |||
4587 | ||||
4588 | llvm::DIImportedEntity * | |||
4589 | CGDebugInfo::EmitNamespaceAlias(const NamespaceAliasDecl &NA) { | |||
4590 | if (CGM.getCodeGenOpts().getDebugInfo() < codegenoptions::LimitedDebugInfo) | |||
4591 | return nullptr; | |||
4592 | auto &VH = NamespaceAliasCache[&NA]; | |||
4593 | if (VH) | |||
4594 | return cast<llvm::DIImportedEntity>(VH); | |||
4595 | llvm::DIImportedEntity *R; | |||
4596 | auto Loc = NA.getLocation(); | |||
4597 | if (const auto *Underlying = | |||
4598 | dyn_cast<NamespaceAliasDecl>(NA.getAliasedNamespace())) | |||
4599 | // This could cache & dedup here rather than relying on metadata deduping. | |||
4600 | R = DBuilder.createImportedDeclaration( | |||
4601 | getCurrentContextDescriptor(cast<Decl>(NA.getDeclContext())), | |||
4602 | EmitNamespaceAlias(*Underlying), getOrCreateFile(Loc), | |||
4603 | getLineNumber(Loc), NA.getName()); | |||
4604 | else | |||
4605 | R = DBuilder.createImportedDeclaration( | |||
4606 | getCurrentContextDescriptor(cast<Decl>(NA.getDeclContext())), | |||
4607 | getOrCreateNamespace(cast<NamespaceDecl>(NA.getAliasedNamespace())), | |||
4608 | getOrCreateFile(Loc), getLineNumber(Loc), NA.getName()); | |||
4609 | VH.reset(R); | |||
4610 | return R; | |||
4611 | } | |||
4612 | ||||
4613 | llvm::DINamespace * | |||
4614 | CGDebugInfo::getOrCreateNamespace(const NamespaceDecl *NSDecl) { | |||
4615 | // Don't canonicalize the NamespaceDecl here: The DINamespace will be uniqued | |||
4616 | // if necessary, and this way multiple declarations of the same namespace in | |||
4617 | // different parent modules stay distinct. | |||
4618 | auto I = NamespaceCache.find(NSDecl); | |||
4619 | if (I != NamespaceCache.end()) | |||
4620 | return cast<llvm::DINamespace>(I->second); | |||
4621 | ||||
4622 | llvm::DIScope *Context = getDeclContextDescriptor(NSDecl); | |||
4623 | // Don't trust the context if it is a DIModule (see comment above). | |||
4624 | llvm::DINamespace *NS = | |||
4625 | DBuilder.createNameSpace(Context, NSDecl->getName(), NSDecl->isInline()); | |||
4626 | NamespaceCache[NSDecl].reset(NS); | |||
4627 | return NS; | |||
4628 | } | |||
4629 | ||||
4630 | void CGDebugInfo::setDwoId(uint64_t Signature) { | |||
4631 | 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-10~svn374877/tools/clang/lib/CodeGen/CGDebugInfo.cpp" , 4631, __PRETTY_FUNCTION__)); | |||
4632 | TheCU->setDWOId(Signature); | |||
4633 | } | |||
4634 | ||||
4635 | /// Analyzes each function parameter to determine whether it is constant | |||
4636 | /// throughout the function body. | |||
4637 | static void analyzeParametersModification( | |||
4638 | ASTContext &Ctx, | |||
4639 | llvm::DenseMap<const FunctionDecl *, llvm::TrackingMDRef> &SPDefCache, | |||
4640 | llvm::DenseMap<const ParmVarDecl *, llvm::TrackingMDRef> &ParamCache) { | |||
4641 | for (auto &SP : SPDefCache) { | |||
4642 | auto *FD = SP.first; | |||
4643 | assert(FD->hasBody() && "Functions must have body here")((FD->hasBody() && "Functions must have body here" ) ? static_cast<void> (0) : __assert_fail ("FD->hasBody() && \"Functions must have body here\"" , "/build/llvm-toolchain-snapshot-10~svn374877/tools/clang/lib/CodeGen/CGDebugInfo.cpp" , 4643, __PRETTY_FUNCTION__)); | |||
4644 | const Stmt *FuncBody = (*FD).getBody(); | |||
4645 | for (auto Parm : FD->parameters()) { | |||
4646 | ExprMutationAnalyzer FuncAnalyzer(*FuncBody, Ctx); | |||
4647 | if (FuncAnalyzer.isMutated(Parm)) | |||
4648 | continue; | |||
4649 | ||||
4650 | auto I = ParamCache.find(Parm); | |||
4651 | assert(I != ParamCache.end() && "Parameters should be already cached")((I != ParamCache.end() && "Parameters should be already cached" ) ? static_cast<void> (0) : __assert_fail ("I != ParamCache.end() && \"Parameters should be already cached\"" , "/build/llvm-toolchain-snapshot-10~svn374877/tools/clang/lib/CodeGen/CGDebugInfo.cpp" , 4651, __PRETTY_FUNCTION__)); | |||
4652 | auto *DIParm = cast<llvm::DILocalVariable>(I->second); | |||
4653 | DIParm->setIsNotModified(); | |||
4654 | } | |||
4655 | } | |||
4656 | } | |||
4657 | ||||
4658 | void CGDebugInfo::finalize() { | |||
4659 | // Creating types might create further types - invalidating the current | |||
4660 | // element and the size(), so don't cache/reference them. | |||
4661 | for (size_t i = 0; i != ObjCInterfaceCache.size(); ++i) { | |||
4662 | ObjCInterfaceCacheEntry E = ObjCInterfaceCache[i]; | |||
4663 | llvm::DIType *Ty = E.Type->getDecl()->getDefinition() | |||
4664 | ? CreateTypeDefinition(E.Type, E.Unit) | |||
4665 | : E.Decl; | |||
4666 | DBuilder.replaceTemporary(llvm::TempDIType(E.Decl), Ty); | |||
4667 | } | |||
4668 | ||||
4669 | if (CGM.getCodeGenOpts().DwarfVersion >= 5) { | |||
4670 | // Add methods to interface. | |||
4671 | for (const auto &P : ObjCMethodCache) { | |||
4672 | if (P.second.empty()) | |||
4673 | continue; | |||
4674 | ||||
4675 | QualType QTy(P.first->getTypeForDecl(), 0); | |||
4676 | auto It = TypeCache.find(QTy.getAsOpaquePtr()); | |||
4677 | assert(It != TypeCache.end())((It != TypeCache.end()) ? static_cast<void> (0) : __assert_fail ("It != TypeCache.end()", "/build/llvm-toolchain-snapshot-10~svn374877/tools/clang/lib/CodeGen/CGDebugInfo.cpp" , 4677, __PRETTY_FUNCTION__)); | |||
4678 | ||||
4679 | llvm::DICompositeType *InterfaceDecl = | |||
4680 | cast<llvm::DICompositeType>(It->second); | |||
4681 | ||||
4682 | SmallVector<llvm::Metadata *, 16> EltTys; | |||
4683 | auto CurrenetElts = InterfaceDecl->getElements(); | |||
4684 | EltTys.append(CurrenetElts.begin(), CurrenetElts.end()); | |||
4685 | for (auto &MD : P.second) | |||
4686 | EltTys.push_back(MD); | |||
4687 | llvm::DINodeArray Elements = DBuilder.getOrCreateArray(EltTys); | |||
4688 | DBuilder.replaceArrays(InterfaceDecl, Elements); | |||
4689 | } | |||
4690 | } | |||
4691 | ||||
4692 | for (const auto &P : ReplaceMap) { | |||
4693 | assert(P.second)((P.second) ? static_cast<void> (0) : __assert_fail ("P.second" , "/build/llvm-toolchain-snapshot-10~svn374877/tools/clang/lib/CodeGen/CGDebugInfo.cpp" , 4693, __PRETTY_FUNCTION__)); | |||
4694 | auto *Ty = cast<llvm::DIType>(P.second); | |||
4695 | assert(Ty->isForwardDecl())((Ty->isForwardDecl()) ? static_cast<void> (0) : __assert_fail ("Ty->isForwardDecl()", "/build/llvm-toolchain-snapshot-10~svn374877/tools/clang/lib/CodeGen/CGDebugInfo.cpp" , 4695, __PRETTY_FUNCTION__)); | |||
4696 | ||||
4697 | auto It = TypeCache.find(P.first); | |||
4698 | assert(It != TypeCache.end())((It != TypeCache.end()) ? static_cast<void> (0) : __assert_fail ("It != TypeCache.end()", "/build/llvm-toolchain-snapshot-10~svn374877/tools/clang/lib/CodeGen/CGDebugInfo.cpp" , 4698, __PRETTY_FUNCTION__)); | |||
4699 | assert(It->second)((It->second) ? static_cast<void> (0) : __assert_fail ("It->second", "/build/llvm-toolchain-snapshot-10~svn374877/tools/clang/lib/CodeGen/CGDebugInfo.cpp" , 4699, __PRETTY_FUNCTION__)); | |||
4700 | ||||
4701 | DBuilder.replaceTemporary(llvm::TempDIType(Ty), | |||
4702 | cast<llvm::DIType>(It->second)); | |||
4703 | } | |||
4704 | ||||
4705 | for (const auto &P : FwdDeclReplaceMap) { | |||
4706 | assert(P.second)((P.second) ? static_cast<void> (0) : __assert_fail ("P.second" , "/build/llvm-toolchain-snapshot-10~svn374877/tools/clang/lib/CodeGen/CGDebugInfo.cpp" , 4706, __PRETTY_FUNCTION__)); | |||
4707 | llvm::TempMDNode FwdDecl(cast<llvm::MDNode>(P.second)); | |||
4708 | llvm::Metadata *Repl; | |||
4709 | ||||
4710 | auto It = DeclCache.find(P.first); | |||
4711 | // If there has been no definition for the declaration, call RAUW | |||
4712 | // with ourselves, that will destroy the temporary MDNode and | |||
4713 | // replace it with a standard one, avoiding leaking memory. | |||
4714 | if (It == DeclCache.end()) | |||
4715 | Repl = P.second; | |||
4716 | else | |||
4717 | Repl = It->second; | |||
4718 | ||||
4719 | if (auto *GVE = dyn_cast_or_null<llvm::DIGlobalVariableExpression>(Repl)) | |||
4720 | Repl = GVE->getVariable(); | |||
4721 | DBuilder.replaceTemporary(std::move(FwdDecl), cast<llvm::MDNode>(Repl)); | |||
4722 | } | |||
4723 | ||||
4724 | // We keep our own list of retained types, because we need to look | |||
4725 | // up the final type in the type cache. | |||
4726 | for (auto &RT : RetainedTypes) | |||
4727 | if (auto MD = TypeCache[RT]) | |||
4728 | DBuilder.retainType(cast<llvm::DIType>(MD)); | |||
4729 | ||||
4730 | if (CGM.getCodeGenOpts().EnableDebugEntryValues) | |||
4731 | // This will be used to emit debug entry values. | |||
4732 | analyzeParametersModification(CGM.getContext(), SPDefCache, ParamCache); | |||
4733 | ||||
4734 | DBuilder.finalize(); | |||
4735 | } | |||
4736 | ||||
4737 | void CGDebugInfo::EmitExplicitCastType(QualType Ty) { | |||
4738 | if (CGM.getCodeGenOpts().getDebugInfo() < codegenoptions::LimitedDebugInfo) | |||
4739 | return; | |||
4740 | ||||
4741 | if (auto *DieTy = getOrCreateType(Ty, TheCU->getFile())) | |||
4742 | // Don't ignore in case of explicit cast where it is referenced indirectly. | |||
4743 | DBuilder.retainType(DieTy); | |||
4744 | } | |||
4745 | ||||
4746 | llvm::DebugLoc CGDebugInfo::SourceLocToDebugLoc(SourceLocation Loc) { | |||
4747 | if (LexicalBlockStack.empty()) | |||
4748 | return llvm::DebugLoc(); | |||
4749 | ||||
4750 | llvm::MDNode *Scope = LexicalBlockStack.back(); | |||
4751 | return llvm::DebugLoc::get(getLineNumber(Loc), getColumnNumber(Loc), Scope); | |||
4752 | } | |||
4753 | ||||
4754 | llvm::DINode::DIFlags CGDebugInfo::getCallSiteRelatedAttrs() const { | |||
4755 | // Call site-related attributes are only useful in optimized programs, and | |||
4756 | // when there's a possibility of debugging backtraces. | |||
4757 | if (!CGM.getLangOpts().Optimize || DebugKind == codegenoptions::NoDebugInfo || | |||
4758 | DebugKind == codegenoptions::LocTrackingOnly) | |||
4759 | return llvm::DINode::FlagZero; | |||
4760 | ||||
4761 | // Call site-related attributes are available in DWARF v5. Some debuggers, | |||
4762 | // while not fully DWARF v5-compliant, may accept these attributes as if they | |||
4763 | // were part of DWARF v4. | |||
4764 | bool SupportsDWARFv4Ext = | |||
4765 | CGM.getCodeGenOpts().DwarfVersion == 4 && | |||
4766 | (CGM.getCodeGenOpts().getDebuggerTuning() == llvm::DebuggerKind::LLDB || | |||
4767 | (CGM.getCodeGenOpts().EnableDebugEntryValues && | |||
4768 | CGM.getCodeGenOpts().getDebuggerTuning() == llvm::DebuggerKind::GDB)); | |||
4769 | ||||
4770 | if (!SupportsDWARFv4Ext && CGM.getCodeGenOpts().DwarfVersion < 5) | |||
4771 | return llvm::DINode::FlagZero; | |||
4772 | ||||
4773 | return llvm::DINode::FlagAllCallsDescribed; | |||
4774 | } |