File: | tools/clang/lib/CodeGen/CGDebugInfo.cpp |
Warning: | line 3095, column 20 Called C++ object pointer is null |
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1 | //===--- CGDebugInfo.cpp - Emit Debug Information for a Module ------------===// | |||
2 | // | |||
3 | // The LLVM Compiler Infrastructure | |||
4 | // | |||
5 | // This file is distributed under the University of Illinois Open Source | |||
6 | // License. See LICENSE.TXT for details. | |||
7 | // | |||
8 | //===----------------------------------------------------------------------===// | |||
9 | // | |||
10 | // This coordinates the debug information generation while generating code. | |||
11 | // | |||
12 | //===----------------------------------------------------------------------===// | |||
13 | ||||
14 | #include "CGDebugInfo.h" | |||
15 | #include "CGBlocks.h" | |||
16 | #include "CGCXXABI.h" | |||
17 | #include "CGObjCRuntime.h" | |||
18 | #include "CGRecordLayout.h" | |||
19 | #include "CodeGenFunction.h" | |||
20 | #include "CodeGenModule.h" | |||
21 | #include "ConstantEmitter.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/FileManager.h" | |||
29 | #include "clang/Basic/SourceManager.h" | |||
30 | #include "clang/Basic/Version.h" | |||
31 | #include "clang/Frontend/CodeGenOptions.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/Module.h" | |||
45 | #include "llvm/Support/FileSystem.h" | |||
46 | #include "llvm/Support/MD5.h" | |||
47 | #include "llvm/Support/Path.h" | |||
48 | using namespace clang; | |||
49 | using namespace clang::CodeGen; | |||
50 | ||||
51 | static uint32_t getTypeAlignIfRequired(const Type *Ty, const ASTContext &Ctx) { | |||
52 | auto TI = Ctx.getTypeInfo(Ty); | |||
53 | return TI.AlignIsRequired ? TI.Align : 0; | |||
54 | } | |||
55 | ||||
56 | static uint32_t getTypeAlignIfRequired(QualType Ty, const ASTContext &Ctx) { | |||
57 | return getTypeAlignIfRequired(Ty.getTypePtr(), Ctx); | |||
58 | } | |||
59 | ||||
60 | static uint32_t getDeclAlignIfRequired(const Decl *D, const ASTContext &Ctx) { | |||
61 | return D->hasAttr<AlignedAttr>() ? D->getMaxAlignment() : 0; | |||
62 | } | |||
63 | ||||
64 | CGDebugInfo::CGDebugInfo(CodeGenModule &CGM) | |||
65 | : CGM(CGM), DebugKind(CGM.getCodeGenOpts().getDebugInfo()), | |||
66 | DebugTypeExtRefs(CGM.getCodeGenOpts().DebugTypeExtRefs), | |||
67 | DBuilder(CGM.getModule()) { | |||
68 | for (const auto &KV : CGM.getCodeGenOpts().DebugPrefixMap) | |||
69 | DebugPrefixMap[KV.first] = KV.second; | |||
70 | CreateCompileUnit(); | |||
71 | } | |||
72 | ||||
73 | CGDebugInfo::~CGDebugInfo() { | |||
74 | assert(LexicalBlockStack.empty() &&(static_cast <bool> (LexicalBlockStack.empty() && "Region stack mismatch, stack not empty!") ? void (0) : __assert_fail ("LexicalBlockStack.empty() && \"Region stack mismatch, stack not empty!\"" , "/build/llvm-toolchain-snapshot-7~svn338205/tools/clang/lib/CodeGen/CGDebugInfo.cpp" , 75, __extension__ __PRETTY_FUNCTION__)) | |||
75 | "Region stack mismatch, stack not empty!")(static_cast <bool> (LexicalBlockStack.empty() && "Region stack mismatch, stack not empty!") ? void (0) : __assert_fail ("LexicalBlockStack.empty() && \"Region stack mismatch, stack not empty!\"" , "/build/llvm-toolchain-snapshot-7~svn338205/tools/clang/lib/CodeGen/CGDebugInfo.cpp" , 75, __extension__ __PRETTY_FUNCTION__)); | |||
76 | } | |||
77 | ||||
78 | ApplyDebugLocation::ApplyDebugLocation(CodeGenFunction &CGF, | |||
79 | SourceLocation TemporaryLocation) | |||
80 | : CGF(&CGF) { | |||
81 | init(TemporaryLocation); | |||
82 | } | |||
83 | ||||
84 | ApplyDebugLocation::ApplyDebugLocation(CodeGenFunction &CGF, | |||
85 | bool DefaultToEmpty, | |||
86 | SourceLocation TemporaryLocation) | |||
87 | : CGF(&CGF) { | |||
88 | init(TemporaryLocation, DefaultToEmpty); | |||
89 | } | |||
90 | ||||
91 | void ApplyDebugLocation::init(SourceLocation TemporaryLocation, | |||
92 | bool DefaultToEmpty) { | |||
93 | auto *DI = CGF->getDebugInfo(); | |||
94 | if (!DI) { | |||
95 | CGF = nullptr; | |||
96 | return; | |||
97 | } | |||
98 | ||||
99 | OriginalLocation = CGF->Builder.getCurrentDebugLocation(); | |||
100 | ||||
101 | if (OriginalLocation && !DI->CGM.getExpressionLocationsEnabled()) | |||
102 | return; | |||
103 | ||||
104 | if (TemporaryLocation.isValid()) { | |||
105 | DI->EmitLocation(CGF->Builder, TemporaryLocation); | |||
106 | return; | |||
107 | } | |||
108 | ||||
109 | if (DefaultToEmpty) { | |||
110 | CGF->Builder.SetCurrentDebugLocation(llvm::DebugLoc()); | |||
111 | return; | |||
112 | } | |||
113 | ||||
114 | // Construct a location that has a valid scope, but no line info. | |||
115 | assert(!DI->LexicalBlockStack.empty())(static_cast <bool> (!DI->LexicalBlockStack.empty()) ? void (0) : __assert_fail ("!DI->LexicalBlockStack.empty()" , "/build/llvm-toolchain-snapshot-7~svn338205/tools/clang/lib/CodeGen/CGDebugInfo.cpp" , 115, __extension__ __PRETTY_FUNCTION__)); | |||
116 | CGF->Builder.SetCurrentDebugLocation(llvm::DebugLoc::get( | |||
117 | 0, 0, DI->LexicalBlockStack.back(), DI->getInlinedAt())); | |||
118 | } | |||
119 | ||||
120 | ApplyDebugLocation::ApplyDebugLocation(CodeGenFunction &CGF, const Expr *E) | |||
121 | : CGF(&CGF) { | |||
122 | init(E->getExprLoc()); | |||
123 | } | |||
124 | ||||
125 | ApplyDebugLocation::ApplyDebugLocation(CodeGenFunction &CGF, llvm::DebugLoc Loc) | |||
126 | : CGF(&CGF) { | |||
127 | if (!CGF.getDebugInfo()) { | |||
128 | this->CGF = nullptr; | |||
129 | return; | |||
130 | } | |||
131 | OriginalLocation = CGF.Builder.getCurrentDebugLocation(); | |||
132 | if (Loc) | |||
133 | CGF.Builder.SetCurrentDebugLocation(std::move(Loc)); | |||
134 | } | |||
135 | ||||
136 | ApplyDebugLocation::~ApplyDebugLocation() { | |||
137 | // Query CGF so the location isn't overwritten when location updates are | |||
138 | // temporarily disabled (for C++ default function arguments) | |||
139 | if (CGF) | |||
140 | CGF->Builder.SetCurrentDebugLocation(std::move(OriginalLocation)); | |||
141 | } | |||
142 | ||||
143 | ApplyInlineDebugLocation::ApplyInlineDebugLocation(CodeGenFunction &CGF, | |||
144 | GlobalDecl InlinedFn) | |||
145 | : CGF(&CGF) { | |||
146 | if (!CGF.getDebugInfo()) { | |||
147 | this->CGF = nullptr; | |||
148 | return; | |||
149 | } | |||
150 | auto &DI = *CGF.getDebugInfo(); | |||
151 | SavedLocation = DI.getLocation(); | |||
152 | assert((DI.getInlinedAt() ==(static_cast <bool> ((DI.getInlinedAt() == CGF.Builder. getCurrentDebugLocation()->getInlinedAt()) && "CGDebugInfo and IRBuilder are out of sync" ) ? void (0) : __assert_fail ("(DI.getInlinedAt() == CGF.Builder.getCurrentDebugLocation()->getInlinedAt()) && \"CGDebugInfo and IRBuilder are out of sync\"" , "/build/llvm-toolchain-snapshot-7~svn338205/tools/clang/lib/CodeGen/CGDebugInfo.cpp" , 154, __extension__ __PRETTY_FUNCTION__)) | |||
153 | CGF.Builder.getCurrentDebugLocation()->getInlinedAt()) &&(static_cast <bool> ((DI.getInlinedAt() == CGF.Builder. getCurrentDebugLocation()->getInlinedAt()) && "CGDebugInfo and IRBuilder are out of sync" ) ? void (0) : __assert_fail ("(DI.getInlinedAt() == CGF.Builder.getCurrentDebugLocation()->getInlinedAt()) && \"CGDebugInfo and IRBuilder are out of sync\"" , "/build/llvm-toolchain-snapshot-7~svn338205/tools/clang/lib/CodeGen/CGDebugInfo.cpp" , 154, __extension__ __PRETTY_FUNCTION__)) | |||
154 | "CGDebugInfo and IRBuilder are out of sync")(static_cast <bool> ((DI.getInlinedAt() == CGF.Builder. getCurrentDebugLocation()->getInlinedAt()) && "CGDebugInfo and IRBuilder are out of sync" ) ? void (0) : __assert_fail ("(DI.getInlinedAt() == CGF.Builder.getCurrentDebugLocation()->getInlinedAt()) && \"CGDebugInfo and IRBuilder are out of sync\"" , "/build/llvm-toolchain-snapshot-7~svn338205/tools/clang/lib/CodeGen/CGDebugInfo.cpp" , 154, __extension__ __PRETTY_FUNCTION__)); | |||
155 | ||||
156 | DI.EmitInlineFunctionStart(CGF.Builder, InlinedFn); | |||
157 | } | |||
158 | ||||
159 | ApplyInlineDebugLocation::~ApplyInlineDebugLocation() { | |||
160 | if (!CGF) | |||
161 | return; | |||
162 | auto &DI = *CGF->getDebugInfo(); | |||
163 | DI.EmitInlineFunctionEnd(CGF->Builder); | |||
164 | DI.EmitLocation(CGF->Builder, SavedLocation); | |||
165 | } | |||
166 | ||||
167 | void CGDebugInfo::setLocation(SourceLocation Loc) { | |||
168 | // If the new location isn't valid return. | |||
169 | if (Loc.isInvalid()) | |||
170 | return; | |||
171 | ||||
172 | CurLoc = CGM.getContext().getSourceManager().getExpansionLoc(Loc); | |||
173 | ||||
174 | // If we've changed files in the middle of a lexical scope go ahead | |||
175 | // and create a new lexical scope with file node if it's different | |||
176 | // from the one in the scope. | |||
177 | if (LexicalBlockStack.empty()) | |||
178 | return; | |||
179 | ||||
180 | SourceManager &SM = CGM.getContext().getSourceManager(); | |||
181 | auto *Scope = cast<llvm::DIScope>(LexicalBlockStack.back()); | |||
182 | PresumedLoc PCLoc = SM.getPresumedLoc(CurLoc); | |||
183 | ||||
184 | if (PCLoc.isInvalid() || Scope->getFilename() == PCLoc.getFilename()) | |||
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 | getOrCreateMainFile()); | |||
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 | return PP; | |||
238 | } | |||
239 | ||||
240 | StringRef CGDebugInfo::getFunctionName(const FunctionDecl *FD) { | |||
241 | assert(FD && "Invalid FunctionDecl!")(static_cast <bool> (FD && "Invalid FunctionDecl!" ) ? void (0) : __assert_fail ("FD && \"Invalid FunctionDecl!\"" , "/build/llvm-toolchain-snapshot-7~svn338205/tools/clang/lib/CodeGen/CGDebugInfo.cpp" , 241, __extension__ __PRETTY_FUNCTION__)); | |||
242 | IdentifierInfo *FII = FD->getIdentifier(); | |||
243 | FunctionTemplateSpecializationInfo *Info = | |||
244 | FD->getTemplateSpecializationInfo(); | |||
245 | ||||
246 | // Emit the unqualified name in normal operation. LLVM and the debugger can | |||
247 | // compute the fully qualified name from the scope chain. If we're only | |||
248 | // emitting line table info, there won't be any scope chains, so emit the | |||
249 | // fully qualified name here so that stack traces are more accurate. | |||
250 | // FIXME: Do this when emitting DWARF as well as when emitting CodeView after | |||
251 | // evaluating the size impact. | |||
252 | bool UseQualifiedName = DebugKind == codegenoptions::DebugLineTablesOnly && | |||
253 | CGM.getCodeGenOpts().EmitCodeView; | |||
254 | ||||
255 | if (!Info && FII && !UseQualifiedName) | |||
256 | return FII->getName(); | |||
257 | ||||
258 | SmallString<128> NS; | |||
259 | llvm::raw_svector_ostream OS(NS); | |||
260 | if (!UseQualifiedName) | |||
261 | FD->printName(OS); | |||
262 | else | |||
263 | FD->printQualifiedName(OS, getPrintingPolicy()); | |||
264 | ||||
265 | // Add any template specialization args. | |||
266 | if (Info) { | |||
267 | const TemplateArgumentList *TArgs = Info->TemplateArguments; | |||
268 | printTemplateArgumentList(OS, TArgs->asArray(), getPrintingPolicy()); | |||
269 | } | |||
270 | ||||
271 | // Copy this name on the side and use its reference. | |||
272 | return internString(OS.str()); | |||
273 | } | |||
274 | ||||
275 | StringRef CGDebugInfo::getObjCMethodName(const ObjCMethodDecl *OMD) { | |||
276 | SmallString<256> MethodName; | |||
277 | llvm::raw_svector_ostream OS(MethodName); | |||
278 | OS << (OMD->isInstanceMethod() ? '-' : '+') << '['; | |||
279 | const DeclContext *DC = OMD->getDeclContext(); | |||
280 | if (const auto *OID = dyn_cast<ObjCImplementationDecl>(DC)) { | |||
281 | OS << OID->getName(); | |||
282 | } else if (const auto *OID = dyn_cast<ObjCInterfaceDecl>(DC)) { | |||
283 | OS << OID->getName(); | |||
284 | } else if (const auto *OC = dyn_cast<ObjCCategoryDecl>(DC)) { | |||
285 | if (OC->IsClassExtension()) { | |||
286 | OS << OC->getClassInterface()->getName(); | |||
287 | } else { | |||
288 | OS << OC->getIdentifier()->getNameStart() << '(' | |||
289 | << OC->getIdentifier()->getNameStart() << ')'; | |||
290 | } | |||
291 | } else if (const auto *OCD = dyn_cast<ObjCCategoryImplDecl>(DC)) { | |||
292 | OS << OCD->getClassInterface()->getName() << '(' << OCD->getName() << ')'; | |||
293 | } else if (isa<ObjCProtocolDecl>(DC)) { | |||
294 | // We can extract the type of the class from the self pointer. | |||
295 | if (ImplicitParamDecl *SelfDecl = OMD->getSelfDecl()) { | |||
296 | QualType ClassTy = | |||
297 | cast<ObjCObjectPointerType>(SelfDecl->getType())->getPointeeType(); | |||
298 | ClassTy.print(OS, PrintingPolicy(LangOptions())); | |||
299 | } | |||
300 | } | |||
301 | OS << ' ' << OMD->getSelector().getAsString() << ']'; | |||
302 | ||||
303 | return internString(OS.str()); | |||
304 | } | |||
305 | ||||
306 | StringRef CGDebugInfo::getSelectorName(Selector S) { | |||
307 | return internString(S.getAsString()); | |||
308 | } | |||
309 | ||||
310 | StringRef CGDebugInfo::getClassName(const RecordDecl *RD) { | |||
311 | if (isa<ClassTemplateSpecializationDecl>(RD)) { | |||
312 | SmallString<128> Name; | |||
313 | llvm::raw_svector_ostream OS(Name); | |||
314 | RD->getNameForDiagnostic(OS, getPrintingPolicy(), | |||
315 | /*Qualified*/ false); | |||
316 | ||||
317 | // Copy this name on the side and use its reference. | |||
318 | return internString(Name); | |||
319 | } | |||
320 | ||||
321 | // quick optimization to avoid having to intern strings that are already | |||
322 | // stored reliably elsewhere | |||
323 | if (const IdentifierInfo *II = RD->getIdentifier()) | |||
324 | return II->getName(); | |||
325 | ||||
326 | // The CodeView printer in LLVM wants to see the names of unnamed types: it is | |||
327 | // used to reconstruct the fully qualified type names. | |||
328 | if (CGM.getCodeGenOpts().EmitCodeView) { | |||
329 | if (const TypedefNameDecl *D = RD->getTypedefNameForAnonDecl()) { | |||
330 | assert(RD->getDeclContext() == D->getDeclContext() &&(static_cast <bool> (RD->getDeclContext() == D->getDeclContext () && "Typedef should not be in another decl context!" ) ? void (0) : __assert_fail ("RD->getDeclContext() == D->getDeclContext() && \"Typedef should not be in another decl context!\"" , "/build/llvm-toolchain-snapshot-7~svn338205/tools/clang/lib/CodeGen/CGDebugInfo.cpp" , 331, __extension__ __PRETTY_FUNCTION__)) | |||
331 | "Typedef should not be in another decl context!")(static_cast <bool> (RD->getDeclContext() == D->getDeclContext () && "Typedef should not be in another decl context!" ) ? void (0) : __assert_fail ("RD->getDeclContext() == D->getDeclContext() && \"Typedef should not be in another decl context!\"" , "/build/llvm-toolchain-snapshot-7~svn338205/tools/clang/lib/CodeGen/CGDebugInfo.cpp" , 331, __extension__ __PRETTY_FUNCTION__)); | |||
332 | assert(D->getDeclName().getAsIdentifierInfo() &&(static_cast <bool> (D->getDeclName().getAsIdentifierInfo () && "Typedef was not named!") ? void (0) : __assert_fail ("D->getDeclName().getAsIdentifierInfo() && \"Typedef was not named!\"" , "/build/llvm-toolchain-snapshot-7~svn338205/tools/clang/lib/CodeGen/CGDebugInfo.cpp" , 333, __extension__ __PRETTY_FUNCTION__)) | |||
333 | "Typedef was not named!")(static_cast <bool> (D->getDeclName().getAsIdentifierInfo () && "Typedef was not named!") ? void (0) : __assert_fail ("D->getDeclName().getAsIdentifierInfo() && \"Typedef was not named!\"" , "/build/llvm-toolchain-snapshot-7~svn338205/tools/clang/lib/CodeGen/CGDebugInfo.cpp" , 333, __extension__ __PRETTY_FUNCTION__)); | |||
334 | return D->getDeclName().getAsIdentifierInfo()->getName(); | |||
335 | } | |||
336 | ||||
337 | if (CGM.getLangOpts().CPlusPlus) { | |||
338 | StringRef Name; | |||
339 | ||||
340 | ASTContext &Context = CGM.getContext(); | |||
341 | if (const DeclaratorDecl *DD = Context.getDeclaratorForUnnamedTagDecl(RD)) | |||
342 | // Anonymous types without a name for linkage purposes have their | |||
343 | // declarator mangled in if they have one. | |||
344 | Name = DD->getName(); | |||
345 | else if (const TypedefNameDecl *TND = | |||
346 | Context.getTypedefNameForUnnamedTagDecl(RD)) | |||
347 | // Anonymous types without a name for linkage purposes have their | |||
348 | // associate typedef mangled in if they have one. | |||
349 | Name = TND->getName(); | |||
350 | ||||
351 | if (!Name.empty()) { | |||
352 | SmallString<256> UnnamedType("<unnamed-type-"); | |||
353 | UnnamedType += Name; | |||
354 | UnnamedType += '>'; | |||
355 | return internString(UnnamedType); | |||
356 | } | |||
357 | } | |||
358 | } | |||
359 | ||||
360 | return StringRef(); | |||
361 | } | |||
362 | ||||
363 | Optional<llvm::DIFile::ChecksumKind> | |||
364 | CGDebugInfo::computeChecksum(FileID FID, SmallString<32> &Checksum) const { | |||
365 | Checksum.clear(); | |||
366 | ||||
367 | if (!CGM.getCodeGenOpts().EmitCodeView && | |||
368 | CGM.getCodeGenOpts().DwarfVersion < 5) | |||
369 | return None; | |||
370 | ||||
371 | SourceManager &SM = CGM.getContext().getSourceManager(); | |||
372 | bool Invalid; | |||
373 | llvm::MemoryBuffer *MemBuffer = SM.getBuffer(FID, &Invalid); | |||
374 | if (Invalid) | |||
375 | return None; | |||
376 | ||||
377 | llvm::MD5 Hash; | |||
378 | llvm::MD5::MD5Result Result; | |||
379 | ||||
380 | Hash.update(MemBuffer->getBuffer()); | |||
381 | Hash.final(Result); | |||
382 | ||||
383 | Hash.stringifyResult(Result, Checksum); | |||
384 | return llvm::DIFile::CSK_MD5; | |||
385 | } | |||
386 | ||||
387 | Optional<StringRef> CGDebugInfo::getSource(const SourceManager &SM, | |||
388 | FileID FID) { | |||
389 | if (!CGM.getCodeGenOpts().EmbedSource) | |||
390 | return None; | |||
391 | ||||
392 | bool SourceInvalid = false; | |||
393 | StringRef Source = SM.getBufferData(FID, &SourceInvalid); | |||
394 | ||||
395 | if (SourceInvalid) | |||
396 | return None; | |||
397 | ||||
398 | return Source; | |||
399 | } | |||
400 | ||||
401 | llvm::DIFile *CGDebugInfo::getOrCreateFile(SourceLocation Loc) { | |||
402 | if (!Loc.isValid()) | |||
403 | // If Location is not valid then use main input file. | |||
404 | return getOrCreateMainFile(); | |||
405 | ||||
406 | SourceManager &SM = CGM.getContext().getSourceManager(); | |||
407 | PresumedLoc PLoc = SM.getPresumedLoc(Loc); | |||
408 | ||||
409 | if (PLoc.isInvalid() || StringRef(PLoc.getFilename()).empty()) | |||
410 | // If the location is not valid then use main input file. | |||
411 | return getOrCreateMainFile(); | |||
412 | ||||
413 | // Cache the results. | |||
414 | const char *fname = PLoc.getFilename(); | |||
415 | auto It = DIFileCache.find(fname); | |||
416 | ||||
417 | if (It != DIFileCache.end()) { | |||
418 | // Verify that the information still exists. | |||
419 | if (llvm::Metadata *V = It->second) | |||
420 | return cast<llvm::DIFile>(V); | |||
421 | } | |||
422 | ||||
423 | SmallString<32> Checksum; | |||
424 | Optional<llvm::DIFile::ChecksumKind> CSKind = | |||
425 | computeChecksum(SM.getFileID(Loc), Checksum); | |||
426 | Optional<llvm::DIFile::ChecksumInfo<StringRef>> CSInfo; | |||
427 | if (CSKind) | |||
428 | CSInfo.emplace(*CSKind, Checksum); | |||
429 | ||||
430 | llvm::DIFile *F = DBuilder.createFile( | |||
431 | remapDIPath(PLoc.getFilename()), remapDIPath(getCurrentDirname()), CSInfo, | |||
432 | getSource(SM, SM.getFileID(Loc))); | |||
433 | ||||
434 | DIFileCache[fname].reset(F); | |||
435 | return F; | |||
436 | } | |||
437 | ||||
438 | llvm::DIFile *CGDebugInfo::getOrCreateMainFile() { | |||
439 | return DBuilder.createFile( | |||
440 | remapDIPath(TheCU->getFilename()), remapDIPath(TheCU->getDirectory()), | |||
441 | TheCU->getFile()->getChecksum(), | |||
442 | CGM.getCodeGenOpts().EmbedSource ? TheCU->getSource() : None); | |||
443 | } | |||
444 | ||||
445 | std::string CGDebugInfo::remapDIPath(StringRef Path) const { | |||
446 | for (const auto &Entry : DebugPrefixMap) | |||
447 | if (Path.startswith(Entry.first)) | |||
448 | return (Twine(Entry.second) + Path.substr(Entry.first.size())).str(); | |||
449 | return Path.str(); | |||
450 | } | |||
451 | ||||
452 | unsigned CGDebugInfo::getLineNumber(SourceLocation Loc) { | |||
453 | if (Loc.isInvalid() && CurLoc.isInvalid()) | |||
454 | return 0; | |||
455 | SourceManager &SM = CGM.getContext().getSourceManager(); | |||
456 | PresumedLoc PLoc = SM.getPresumedLoc(Loc.isValid() ? Loc : CurLoc); | |||
457 | return PLoc.isValid() ? PLoc.getLine() : 0; | |||
458 | } | |||
459 | ||||
460 | unsigned CGDebugInfo::getColumnNumber(SourceLocation Loc, bool Force) { | |||
461 | // We may not want column information at all. | |||
462 | if (!Force && !CGM.getCodeGenOpts().DebugColumnInfo) | |||
463 | return 0; | |||
464 | ||||
465 | // If the location is invalid then use the current column. | |||
466 | if (Loc.isInvalid() && CurLoc.isInvalid()) | |||
467 | return 0; | |||
468 | SourceManager &SM = CGM.getContext().getSourceManager(); | |||
469 | PresumedLoc PLoc = SM.getPresumedLoc(Loc.isValid() ? Loc : CurLoc); | |||
470 | return PLoc.isValid() ? PLoc.getColumn() : 0; | |||
471 | } | |||
472 | ||||
473 | StringRef CGDebugInfo::getCurrentDirname() { | |||
474 | if (!CGM.getCodeGenOpts().DebugCompilationDir.empty()) | |||
475 | return CGM.getCodeGenOpts().DebugCompilationDir; | |||
476 | ||||
477 | if (!CWDName.empty()) | |||
478 | return CWDName; | |||
479 | SmallString<256> CWD; | |||
480 | llvm::sys::fs::current_path(CWD); | |||
481 | return CWDName = internString(CWD); | |||
482 | } | |||
483 | ||||
484 | void CGDebugInfo::CreateCompileUnit() { | |||
485 | SmallString<32> Checksum; | |||
486 | Optional<llvm::DIFile::ChecksumKind> CSKind; | |||
487 | Optional<llvm::DIFile::ChecksumInfo<StringRef>> CSInfo; | |||
488 | ||||
489 | // Should we be asking the SourceManager for the main file name, instead of | |||
490 | // accepting it as an argument? This just causes the main file name to | |||
491 | // mismatch with source locations and create extra lexical scopes or | |||
492 | // mismatched debug info (a CU with a DW_AT_file of "-", because that's what | |||
493 | // the driver passed, but functions/other things have DW_AT_file of "<stdin>" | |||
494 | // because that's what the SourceManager says) | |||
495 | ||||
496 | // Get absolute path name. | |||
497 | SourceManager &SM = CGM.getContext().getSourceManager(); | |||
498 | std::string MainFileName = CGM.getCodeGenOpts().MainFileName; | |||
499 | if (MainFileName.empty()) | |||
500 | MainFileName = "<stdin>"; | |||
501 | ||||
502 | // The main file name provided via the "-main-file-name" option contains just | |||
503 | // the file name itself with no path information. This file name may have had | |||
504 | // a relative path, so we look into the actual file entry for the main | |||
505 | // file to determine the real absolute path for the file. | |||
506 | std::string MainFileDir; | |||
507 | if (const FileEntry *MainFile = SM.getFileEntryForID(SM.getMainFileID())) { | |||
508 | MainFileDir = remapDIPath(MainFile->getDir()->getName()); | |||
509 | if (MainFileDir != ".") { | |||
510 | llvm::SmallString<1024> MainFileDirSS(MainFileDir); | |||
511 | llvm::sys::path::append(MainFileDirSS, MainFileName); | |||
512 | MainFileName = MainFileDirSS.str(); | |||
513 | } | |||
514 | // If the main file name provided is identical to the input file name, and | |||
515 | // if the input file is a preprocessed source, use the module name for | |||
516 | // debug info. The module name comes from the name specified in the first | |||
517 | // linemarker if the input is a preprocessed source. | |||
518 | if (MainFile->getName() == MainFileName && | |||
519 | FrontendOptions::getInputKindForExtension( | |||
520 | MainFile->getName().rsplit('.').second) | |||
521 | .isPreprocessed()) | |||
522 | MainFileName = CGM.getModule().getName().str(); | |||
523 | ||||
524 | CSKind = computeChecksum(SM.getMainFileID(), Checksum); | |||
525 | } | |||
526 | ||||
527 | llvm::dwarf::SourceLanguage LangTag; | |||
528 | const LangOptions &LO = CGM.getLangOpts(); | |||
529 | if (LO.CPlusPlus) { | |||
530 | if (LO.ObjC1) | |||
531 | LangTag = llvm::dwarf::DW_LANG_ObjC_plus_plus; | |||
532 | else | |||
533 | LangTag = llvm::dwarf::DW_LANG_C_plus_plus; | |||
534 | } else if (LO.ObjC1) { | |||
535 | LangTag = llvm::dwarf::DW_LANG_ObjC; | |||
536 | } else if (LO.RenderScript) { | |||
537 | LangTag = llvm::dwarf::DW_LANG_GOOGLE_RenderScript; | |||
538 | } else if (LO.C99) { | |||
539 | LangTag = llvm::dwarf::DW_LANG_C99; | |||
540 | } else { | |||
541 | LangTag = llvm::dwarf::DW_LANG_C89; | |||
542 | } | |||
543 | ||||
544 | std::string Producer = getClangFullVersion(); | |||
545 | ||||
546 | // Figure out which version of the ObjC runtime we have. | |||
547 | unsigned RuntimeVers = 0; | |||
548 | if (LO.ObjC1) | |||
549 | RuntimeVers = LO.ObjCRuntime.isNonFragile() ? 2 : 1; | |||
550 | ||||
551 | llvm::DICompileUnit::DebugEmissionKind EmissionKind; | |||
552 | switch (DebugKind) { | |||
553 | case codegenoptions::NoDebugInfo: | |||
554 | case codegenoptions::LocTrackingOnly: | |||
555 | EmissionKind = llvm::DICompileUnit::NoDebug; | |||
556 | break; | |||
557 | case codegenoptions::DebugLineTablesOnly: | |||
558 | EmissionKind = llvm::DICompileUnit::LineTablesOnly; | |||
559 | break; | |||
560 | case codegenoptions::LimitedDebugInfo: | |||
561 | case codegenoptions::FullDebugInfo: | |||
562 | EmissionKind = llvm::DICompileUnit::FullDebug; | |||
563 | break; | |||
564 | } | |||
565 | ||||
566 | if (CSKind) | |||
567 | CSInfo.emplace(*CSKind, Checksum); | |||
568 | ||||
569 | // Create new compile unit. | |||
570 | // FIXME - Eliminate TheCU. | |||
571 | auto &CGOpts = CGM.getCodeGenOpts(); | |||
572 | TheCU = DBuilder.createCompileUnit( | |||
573 | LangTag, | |||
574 | DBuilder.createFile(remapDIPath(MainFileName), | |||
575 | remapDIPath(getCurrentDirname()), CSInfo, | |||
576 | getSource(SM, SM.getMainFileID())), | |||
577 | CGOpts.EmitVersionIdentMetadata ? Producer : "", | |||
578 | LO.Optimize || CGOpts.PrepareForLTO || CGOpts.PrepareForThinLTO, | |||
579 | CGOpts.DwarfDebugFlags, RuntimeVers, | |||
580 | CGOpts.EnableSplitDwarf ? "" : CGOpts.SplitDwarfFile, EmissionKind, | |||
581 | 0 /* DWOid */, CGOpts.SplitDwarfInlining, CGOpts.DebugInfoForProfiling, | |||
582 | CGOpts.GnuPubnames); | |||
583 | } | |||
584 | ||||
585 | llvm::DIType *CGDebugInfo::CreateType(const BuiltinType *BT) { | |||
586 | llvm::dwarf::TypeKind Encoding; | |||
587 | StringRef BTName; | |||
588 | switch (BT->getKind()) { | |||
589 | #define BUILTIN_TYPE(Id, SingletonId) | |||
590 | #define PLACEHOLDER_TYPE(Id, SingletonId) case BuiltinType::Id: | |||
591 | #include "clang/AST/BuiltinTypes.def" | |||
592 | case BuiltinType::Dependent: | |||
593 | llvm_unreachable("Unexpected builtin type")::llvm::llvm_unreachable_internal("Unexpected builtin type", "/build/llvm-toolchain-snapshot-7~svn338205/tools/clang/lib/CodeGen/CGDebugInfo.cpp" , 593); | |||
594 | case BuiltinType::NullPtr: | |||
595 | return DBuilder.createNullPtrType(); | |||
596 | case BuiltinType::Void: | |||
597 | return nullptr; | |||
598 | case BuiltinType::ObjCClass: | |||
599 | if (!ClassTy) | |||
600 | ClassTy = DBuilder.createForwardDecl(llvm::dwarf::DW_TAG_structure_type, | |||
601 | "objc_class", TheCU, | |||
602 | getOrCreateMainFile(), 0); | |||
603 | return ClassTy; | |||
604 | case BuiltinType::ObjCId: { | |||
605 | // typedef struct objc_class *Class; | |||
606 | // typedef struct objc_object { | |||
607 | // Class isa; | |||
608 | // } *id; | |||
609 | ||||
610 | if (ObjTy) | |||
611 | return ObjTy; | |||
612 | ||||
613 | if (!ClassTy) | |||
614 | ClassTy = DBuilder.createForwardDecl(llvm::dwarf::DW_TAG_structure_type, | |||
615 | "objc_class", TheCU, | |||
616 | getOrCreateMainFile(), 0); | |||
617 | ||||
618 | unsigned Size = CGM.getContext().getTypeSize(CGM.getContext().VoidPtrTy); | |||
619 | ||||
620 | auto *ISATy = DBuilder.createPointerType(ClassTy, Size); | |||
621 | ||||
622 | ObjTy = DBuilder.createStructType( | |||
623 | TheCU, "objc_object", getOrCreateMainFile(), 0, 0, 0, | |||
624 | llvm::DINode::FlagZero, nullptr, llvm::DINodeArray()); | |||
625 | ||||
626 | DBuilder.replaceArrays( | |||
627 | ObjTy, DBuilder.getOrCreateArray(&*DBuilder.createMemberType( | |||
628 | ObjTy, "isa", getOrCreateMainFile(), 0, Size, 0, 0, | |||
629 | llvm::DINode::FlagZero, ISATy))); | |||
630 | return ObjTy; | |||
631 | } | |||
632 | case BuiltinType::ObjCSel: { | |||
633 | if (!SelTy) | |||
634 | SelTy = DBuilder.createForwardDecl(llvm::dwarf::DW_TAG_structure_type, | |||
635 | "objc_selector", TheCU, | |||
636 | getOrCreateMainFile(), 0); | |||
637 | return SelTy; | |||
638 | } | |||
639 | ||||
640 | #define IMAGE_TYPE(ImgType, Id, SingletonId, Access, Suffix) \ | |||
641 | case BuiltinType::Id: \ | |||
642 | return getOrCreateStructPtrType("opencl_" #ImgType "_" #Suffix "_t", \ | |||
643 | SingletonId); | |||
644 | #include "clang/Basic/OpenCLImageTypes.def" | |||
645 | case BuiltinType::OCLSampler: | |||
646 | return getOrCreateStructPtrType("opencl_sampler_t", OCLSamplerDITy); | |||
647 | case BuiltinType::OCLEvent: | |||
648 | return getOrCreateStructPtrType("opencl_event_t", OCLEventDITy); | |||
649 | case BuiltinType::OCLClkEvent: | |||
650 | return getOrCreateStructPtrType("opencl_clk_event_t", OCLClkEventDITy); | |||
651 | case BuiltinType::OCLQueue: | |||
652 | return getOrCreateStructPtrType("opencl_queue_t", OCLQueueDITy); | |||
653 | case BuiltinType::OCLReserveID: | |||
654 | return getOrCreateStructPtrType("opencl_reserve_id_t", OCLReserveIDDITy); | |||
655 | ||||
656 | case BuiltinType::UChar: | |||
657 | case BuiltinType::Char_U: | |||
658 | Encoding = llvm::dwarf::DW_ATE_unsigned_char; | |||
659 | break; | |||
660 | case BuiltinType::Char_S: | |||
661 | case BuiltinType::SChar: | |||
662 | Encoding = llvm::dwarf::DW_ATE_signed_char; | |||
663 | break; | |||
664 | case BuiltinType::Char8: | |||
665 | case BuiltinType::Char16: | |||
666 | case BuiltinType::Char32: | |||
667 | Encoding = llvm::dwarf::DW_ATE_UTF; | |||
668 | break; | |||
669 | case BuiltinType::UShort: | |||
670 | case BuiltinType::UInt: | |||
671 | case BuiltinType::UInt128: | |||
672 | case BuiltinType::ULong: | |||
673 | case BuiltinType::WChar_U: | |||
674 | case BuiltinType::ULongLong: | |||
675 | Encoding = llvm::dwarf::DW_ATE_unsigned; | |||
676 | break; | |||
677 | case BuiltinType::Short: | |||
678 | case BuiltinType::Int: | |||
679 | case BuiltinType::Int128: | |||
680 | case BuiltinType::Long: | |||
681 | case BuiltinType::WChar_S: | |||
682 | case BuiltinType::LongLong: | |||
683 | Encoding = llvm::dwarf::DW_ATE_signed; | |||
684 | break; | |||
685 | case BuiltinType::Bool: | |||
686 | Encoding = llvm::dwarf::DW_ATE_boolean; | |||
687 | break; | |||
688 | case BuiltinType::Half: | |||
689 | case BuiltinType::Float: | |||
690 | case BuiltinType::LongDouble: | |||
691 | case BuiltinType::Float16: | |||
692 | case BuiltinType::Float128: | |||
693 | case BuiltinType::Double: | |||
694 | // FIXME: For targets where long double and __float128 have the same size, | |||
695 | // they are currently indistinguishable in the debugger without some | |||
696 | // special treatment. However, there is currently no consensus on encoding | |||
697 | // and this should be updated once a DWARF encoding exists for distinct | |||
698 | // floating point types of the same size. | |||
699 | Encoding = llvm::dwarf::DW_ATE_float; | |||
700 | break; | |||
701 | case BuiltinType::ShortAccum: | |||
702 | case BuiltinType::Accum: | |||
703 | case BuiltinType::LongAccum: | |||
704 | case BuiltinType::ShortFract: | |||
705 | case BuiltinType::Fract: | |||
706 | case BuiltinType::LongFract: | |||
707 | case BuiltinType::SatShortFract: | |||
708 | case BuiltinType::SatFract: | |||
709 | case BuiltinType::SatLongFract: | |||
710 | case BuiltinType::SatShortAccum: | |||
711 | case BuiltinType::SatAccum: | |||
712 | case BuiltinType::SatLongAccum: | |||
713 | Encoding = llvm::dwarf::DW_ATE_signed_fixed; | |||
714 | break; | |||
715 | case BuiltinType::UShortAccum: | |||
716 | case BuiltinType::UAccum: | |||
717 | case BuiltinType::ULongAccum: | |||
718 | case BuiltinType::UShortFract: | |||
719 | case BuiltinType::UFract: | |||
720 | case BuiltinType::ULongFract: | |||
721 | case BuiltinType::SatUShortAccum: | |||
722 | case BuiltinType::SatUAccum: | |||
723 | case BuiltinType::SatULongAccum: | |||
724 | case BuiltinType::SatUShortFract: | |||
725 | case BuiltinType::SatUFract: | |||
726 | case BuiltinType::SatULongFract: | |||
727 | Encoding = llvm::dwarf::DW_ATE_unsigned_fixed; | |||
728 | break; | |||
729 | } | |||
730 | ||||
731 | switch (BT->getKind()) { | |||
732 | case BuiltinType::Long: | |||
733 | BTName = "long int"; | |||
734 | break; | |||
735 | case BuiltinType::LongLong: | |||
736 | BTName = "long long int"; | |||
737 | break; | |||
738 | case BuiltinType::ULong: | |||
739 | BTName = "long unsigned int"; | |||
740 | break; | |||
741 | case BuiltinType::ULongLong: | |||
742 | BTName = "long long unsigned int"; | |||
743 | break; | |||
744 | default: | |||
745 | BTName = BT->getName(CGM.getLangOpts()); | |||
746 | break; | |||
747 | } | |||
748 | // Bit size and offset of the type. | |||
749 | uint64_t Size = CGM.getContext().getTypeSize(BT); | |||
750 | return DBuilder.createBasicType(BTName, Size, Encoding); | |||
751 | } | |||
752 | ||||
753 | llvm::DIType *CGDebugInfo::CreateType(const ComplexType *Ty) { | |||
754 | // Bit size and offset of the type. | |||
755 | llvm::dwarf::TypeKind Encoding = llvm::dwarf::DW_ATE_complex_float; | |||
756 | if (Ty->isComplexIntegerType()) | |||
757 | Encoding = llvm::dwarf::DW_ATE_lo_user; | |||
758 | ||||
759 | uint64_t Size = CGM.getContext().getTypeSize(Ty); | |||
760 | return DBuilder.createBasicType("complex", Size, Encoding); | |||
761 | } | |||
762 | ||||
763 | llvm::DIType *CGDebugInfo::CreateQualifiedType(QualType Ty, | |||
764 | llvm::DIFile *Unit) { | |||
765 | QualifierCollector Qc; | |||
766 | const Type *T = Qc.strip(Ty); | |||
767 | ||||
768 | // Ignore these qualifiers for now. | |||
769 | Qc.removeObjCGCAttr(); | |||
770 | Qc.removeAddressSpace(); | |||
771 | Qc.removeObjCLifetime(); | |||
772 | ||||
773 | // We will create one Derived type for one qualifier and recurse to handle any | |||
774 | // additional ones. | |||
775 | llvm::dwarf::Tag Tag; | |||
776 | if (Qc.hasConst()) { | |||
777 | Tag = llvm::dwarf::DW_TAG_const_type; | |||
778 | Qc.removeConst(); | |||
779 | } else if (Qc.hasVolatile()) { | |||
780 | Tag = llvm::dwarf::DW_TAG_volatile_type; | |||
781 | Qc.removeVolatile(); | |||
782 | } else if (Qc.hasRestrict()) { | |||
783 | Tag = llvm::dwarf::DW_TAG_restrict_type; | |||
784 | Qc.removeRestrict(); | |||
785 | } else { | |||
786 | assert(Qc.empty() && "Unknown type qualifier for debug info")(static_cast <bool> (Qc.empty() && "Unknown type qualifier for debug info" ) ? void (0) : __assert_fail ("Qc.empty() && \"Unknown type qualifier for debug info\"" , "/build/llvm-toolchain-snapshot-7~svn338205/tools/clang/lib/CodeGen/CGDebugInfo.cpp" , 786, __extension__ __PRETTY_FUNCTION__)); | |||
787 | return getOrCreateType(QualType(T, 0), Unit); | |||
788 | } | |||
789 | ||||
790 | auto *FromTy = getOrCreateType(Qc.apply(CGM.getContext(), T), Unit); | |||
791 | ||||
792 | // No need to fill in the Name, Line, Size, Alignment, Offset in case of | |||
793 | // CVR derived types. | |||
794 | return DBuilder.createQualifiedType(Tag, FromTy); | |||
795 | } | |||
796 | ||||
797 | llvm::DIType *CGDebugInfo::CreateType(const ObjCObjectPointerType *Ty, | |||
798 | llvm::DIFile *Unit) { | |||
799 | ||||
800 | // The frontend treats 'id' as a typedef to an ObjCObjectType, | |||
801 | // whereas 'id<protocol>' is treated as an ObjCPointerType. For the | |||
802 | // debug info, we want to emit 'id' in both cases. | |||
803 | if (Ty->isObjCQualifiedIdType()) | |||
804 | return getOrCreateType(CGM.getContext().getObjCIdType(), Unit); | |||
805 | ||||
806 | return CreatePointerLikeType(llvm::dwarf::DW_TAG_pointer_type, Ty, | |||
807 | Ty->getPointeeType(), Unit); | |||
808 | } | |||
809 | ||||
810 | llvm::DIType *CGDebugInfo::CreateType(const PointerType *Ty, | |||
811 | llvm::DIFile *Unit) { | |||
812 | return CreatePointerLikeType(llvm::dwarf::DW_TAG_pointer_type, Ty, | |||
813 | Ty->getPointeeType(), Unit); | |||
814 | } | |||
815 | ||||
816 | /// \return whether a C++ mangling exists for the type defined by TD. | |||
817 | static bool hasCXXMangling(const TagDecl *TD, llvm::DICompileUnit *TheCU) { | |||
818 | switch (TheCU->getSourceLanguage()) { | |||
819 | case llvm::dwarf::DW_LANG_C_plus_plus: | |||
820 | return true; | |||
821 | case llvm::dwarf::DW_LANG_ObjC_plus_plus: | |||
822 | return isa<CXXRecordDecl>(TD) || isa<EnumDecl>(TD); | |||
823 | default: | |||
824 | return false; | |||
825 | } | |||
826 | } | |||
827 | ||||
828 | // Determines if the tag declaration will require a type identifier. | |||
829 | static bool needsTypeIdentifier(const TagDecl *TD, CodeGenModule &CGM, | |||
830 | llvm::DICompileUnit *TheCU) { | |||
831 | // We only add a type identifier for types with C++ name mangling. | |||
832 | if (!hasCXXMangling(TD, TheCU)) | |||
833 | return false; | |||
834 | ||||
835 | // CodeView types with C++ mangling need a type identifier. | |||
836 | if (CGM.getCodeGenOpts().EmitCodeView) | |||
837 | return true; | |||
838 | ||||
839 | // Externally visible types with C++ mangling need a type identifier. | |||
840 | if (TD->isExternallyVisible()) | |||
841 | return true; | |||
842 | ||||
843 | return false; | |||
844 | } | |||
845 | ||||
846 | // When emitting CodeView debug information we need to produce a type | |||
847 | // identifier for all types which have a C++ mangling. Until a GUID is added | |||
848 | // to the identifier (not currently implemented) the result will not be unique | |||
849 | // across compilation units. | |||
850 | // When emitting DWARF debug information, we need to produce a type identifier | |||
851 | // for all externally visible types with C++ name mangling. This identifier | |||
852 | // should be unique across ODR-compliant compilation units. | |||
853 | static SmallString<256> getTypeIdentifier(const TagType *Ty, CodeGenModule &CGM, | |||
854 | llvm::DICompileUnit *TheCU) { | |||
855 | SmallString<256> Identifier; | |||
856 | const TagDecl *TD = Ty->getDecl(); | |||
857 | ||||
858 | if (!needsTypeIdentifier(TD, CGM, TheCU)) | |||
859 | return Identifier; | |||
860 | ||||
861 | // TODO: This is using the RTTI name. Is there a better way to get | |||
862 | // a unique string for a type? | |||
863 | llvm::raw_svector_ostream Out(Identifier); | |||
864 | CGM.getCXXABI().getMangleContext().mangleCXXRTTIName(QualType(Ty, 0), Out); | |||
865 | return Identifier; | |||
866 | } | |||
867 | ||||
868 | /// \return the appropriate DWARF tag for a composite type. | |||
869 | static llvm::dwarf::Tag getTagForRecord(const RecordDecl *RD) { | |||
870 | llvm::dwarf::Tag Tag; | |||
871 | if (RD->isStruct() || RD->isInterface()) | |||
872 | Tag = llvm::dwarf::DW_TAG_structure_type; | |||
873 | else if (RD->isUnion()) | |||
874 | Tag = llvm::dwarf::DW_TAG_union_type; | |||
875 | else { | |||
876 | // FIXME: This could be a struct type giving a default visibility different | |||
877 | // than C++ class type, but needs llvm metadata changes first. | |||
878 | assert(RD->isClass())(static_cast <bool> (RD->isClass()) ? void (0) : __assert_fail ("RD->isClass()", "/build/llvm-toolchain-snapshot-7~svn338205/tools/clang/lib/CodeGen/CGDebugInfo.cpp" , 878, __extension__ __PRETTY_FUNCTION__)); | |||
879 | Tag = llvm::dwarf::DW_TAG_class_type; | |||
880 | } | |||
881 | return Tag; | |||
882 | } | |||
883 | ||||
884 | llvm::DICompositeType * | |||
885 | CGDebugInfo::getOrCreateRecordFwdDecl(const RecordType *Ty, | |||
886 | llvm::DIScope *Ctx) { | |||
887 | const RecordDecl *RD = Ty->getDecl(); | |||
888 | if (llvm::DIType *T = getTypeOrNull(CGM.getContext().getRecordType(RD))) | |||
889 | return cast<llvm::DICompositeType>(T); | |||
890 | llvm::DIFile *DefUnit = getOrCreateFile(RD->getLocation()); | |||
891 | unsigned Line = getLineNumber(RD->getLocation()); | |||
892 | StringRef RDName = getClassName(RD); | |||
893 | ||||
894 | uint64_t Size = 0; | |||
895 | uint32_t Align = 0; | |||
896 | ||||
897 | // Create the type. | |||
898 | SmallString<256> Identifier = getTypeIdentifier(Ty, CGM, TheCU); | |||
899 | llvm::DICompositeType *RetTy = DBuilder.createReplaceableCompositeType( | |||
900 | getTagForRecord(RD), RDName, Ctx, DefUnit, Line, 0, Size, Align, | |||
901 | llvm::DINode::FlagFwdDecl, Identifier); | |||
902 | if (CGM.getCodeGenOpts().DebugFwdTemplateParams) | |||
903 | if (auto *TSpecial = dyn_cast<ClassTemplateSpecializationDecl>(RD)) | |||
904 | DBuilder.replaceArrays(RetTy, llvm::DINodeArray(), | |||
905 | CollectCXXTemplateParams(TSpecial, DefUnit)); | |||
906 | ReplaceMap.emplace_back( | |||
907 | std::piecewise_construct, std::make_tuple(Ty), | |||
908 | std::make_tuple(static_cast<llvm::Metadata *>(RetTy))); | |||
909 | return RetTy; | |||
910 | } | |||
911 | ||||
912 | llvm::DIType *CGDebugInfo::CreatePointerLikeType(llvm::dwarf::Tag Tag, | |||
913 | const Type *Ty, | |||
914 | QualType PointeeTy, | |||
915 | llvm::DIFile *Unit) { | |||
916 | // Bit size, align and offset of the type. | |||
917 | // Size is always the size of a pointer. We can't use getTypeSize here | |||
918 | // because that does not return the correct value for references. | |||
919 | unsigned AddressSpace = CGM.getContext().getTargetAddressSpace(PointeeTy); | |||
920 | uint64_t Size = CGM.getTarget().getPointerWidth(AddressSpace); | |||
921 | auto Align = getTypeAlignIfRequired(Ty, CGM.getContext()); | |||
922 | Optional<unsigned> DWARFAddressSpace = | |||
923 | CGM.getTarget().getDWARFAddressSpace(AddressSpace); | |||
924 | ||||
925 | if (Tag == llvm::dwarf::DW_TAG_reference_type || | |||
926 | Tag == llvm::dwarf::DW_TAG_rvalue_reference_type) | |||
927 | return DBuilder.createReferenceType(Tag, getOrCreateType(PointeeTy, Unit), | |||
928 | Size, Align, DWARFAddressSpace); | |||
929 | else | |||
930 | return DBuilder.createPointerType(getOrCreateType(PointeeTy, Unit), Size, | |||
931 | Align, DWARFAddressSpace); | |||
932 | } | |||
933 | ||||
934 | llvm::DIType *CGDebugInfo::getOrCreateStructPtrType(StringRef Name, | |||
935 | llvm::DIType *&Cache) { | |||
936 | if (Cache) | |||
937 | return Cache; | |||
938 | Cache = DBuilder.createForwardDecl(llvm::dwarf::DW_TAG_structure_type, Name, | |||
939 | TheCU, getOrCreateMainFile(), 0); | |||
940 | unsigned Size = CGM.getContext().getTypeSize(CGM.getContext().VoidPtrTy); | |||
941 | Cache = DBuilder.createPointerType(Cache, Size); | |||
942 | return Cache; | |||
943 | } | |||
944 | ||||
945 | llvm::DIType *CGDebugInfo::CreateType(const BlockPointerType *Ty, | |||
946 | llvm::DIFile *Unit) { | |||
947 | SmallVector<llvm::Metadata *, 8> EltTys; | |||
948 | QualType FType; | |||
949 | uint64_t FieldSize, FieldOffset; | |||
950 | uint32_t FieldAlign; | |||
951 | llvm::DINodeArray Elements; | |||
952 | ||||
953 | FieldOffset = 0; | |||
954 | FType = CGM.getContext().UnsignedLongTy; | |||
955 | EltTys.push_back(CreateMemberType(Unit, FType, "reserved", &FieldOffset)); | |||
956 | EltTys.push_back(CreateMemberType(Unit, FType, "Size", &FieldOffset)); | |||
957 | ||||
958 | Elements = DBuilder.getOrCreateArray(EltTys); | |||
959 | EltTys.clear(); | |||
960 | ||||
961 | llvm::DINode::DIFlags Flags = llvm::DINode::FlagAppleBlock; | |||
962 | unsigned LineNo = 0; | |||
963 | ||||
964 | auto *EltTy = | |||
965 | DBuilder.createStructType(Unit, "__block_descriptor", nullptr, LineNo, | |||
966 | FieldOffset, 0, Flags, nullptr, Elements); | |||
967 | ||||
968 | // Bit size, align and offset of the type. | |||
969 | uint64_t Size = CGM.getContext().getTypeSize(Ty); | |||
970 | ||||
971 | auto *DescTy = DBuilder.createPointerType(EltTy, Size); | |||
972 | ||||
973 | FieldOffset = 0; | |||
974 | FType = CGM.getContext().getPointerType(CGM.getContext().VoidTy); | |||
975 | EltTys.push_back(CreateMemberType(Unit, FType, "__isa", &FieldOffset)); | |||
976 | FType = CGM.getContext().IntTy; | |||
977 | EltTys.push_back(CreateMemberType(Unit, FType, "__flags", &FieldOffset)); | |||
978 | EltTys.push_back(CreateMemberType(Unit, FType, "__reserved", &FieldOffset)); | |||
979 | FType = CGM.getContext().getPointerType(Ty->getPointeeType()); | |||
980 | EltTys.push_back(CreateMemberType(Unit, FType, "__FuncPtr", &FieldOffset)); | |||
981 | ||||
982 | FType = CGM.getContext().getPointerType(CGM.getContext().VoidTy); | |||
983 | FieldSize = CGM.getContext().getTypeSize(Ty); | |||
984 | FieldAlign = CGM.getContext().getTypeAlign(Ty); | |||
985 | EltTys.push_back(DBuilder.createMemberType( | |||
986 | Unit, "__descriptor", nullptr, LineNo, FieldSize, FieldAlign, FieldOffset, | |||
987 | llvm::DINode::FlagZero, DescTy)); | |||
988 | ||||
989 | FieldOffset += FieldSize; | |||
990 | Elements = DBuilder.getOrCreateArray(EltTys); | |||
991 | ||||
992 | // The __block_literal_generic structs are marked with a special | |||
993 | // DW_AT_APPLE_BLOCK attribute and are an implementation detail only | |||
994 | // the debugger needs to know about. To allow type uniquing, emit | |||
995 | // them without a name or a location. | |||
996 | EltTy = DBuilder.createStructType(Unit, "", nullptr, LineNo, FieldOffset, 0, | |||
997 | Flags, nullptr, Elements); | |||
998 | ||||
999 | return DBuilder.createPointerType(EltTy, Size); | |||
1000 | } | |||
1001 | ||||
1002 | llvm::DIType *CGDebugInfo::CreateType(const TemplateSpecializationType *Ty, | |||
1003 | llvm::DIFile *Unit) { | |||
1004 | assert(Ty->isTypeAlias())(static_cast <bool> (Ty->isTypeAlias()) ? void (0) : __assert_fail ("Ty->isTypeAlias()", "/build/llvm-toolchain-snapshot-7~svn338205/tools/clang/lib/CodeGen/CGDebugInfo.cpp" , 1004, __extension__ __PRETTY_FUNCTION__)); | |||
1005 | llvm::DIType *Src = getOrCreateType(Ty->getAliasedType(), Unit); | |||
1006 | ||||
1007 | SmallString<128> NS; | |||
1008 | llvm::raw_svector_ostream OS(NS); | |||
1009 | Ty->getTemplateName().print(OS, getPrintingPolicy(), /*qualified*/ false); | |||
1010 | printTemplateArgumentList(OS, Ty->template_arguments(), getPrintingPolicy()); | |||
1011 | ||||
1012 | auto *AliasDecl = | |||
1013 | cast<TypeAliasTemplateDecl>(Ty->getTemplateName().getAsTemplateDecl()) | |||
1014 | ->getTemplatedDecl(); | |||
1015 | ||||
1016 | SourceLocation Loc = AliasDecl->getLocation(); | |||
1017 | return DBuilder.createTypedef(Src, OS.str(), getOrCreateFile(Loc), | |||
1018 | getLineNumber(Loc), | |||
1019 | getDeclContextDescriptor(AliasDecl)); | |||
1020 | } | |||
1021 | ||||
1022 | llvm::DIType *CGDebugInfo::CreateType(const TypedefType *Ty, | |||
1023 | llvm::DIFile *Unit) { | |||
1024 | // We don't set size information, but do specify where the typedef was | |||
1025 | // declared. | |||
1026 | SourceLocation Loc = Ty->getDecl()->getLocation(); | |||
1027 | ||||
1028 | // Typedefs are derived from some other type. | |||
1029 | return DBuilder.createTypedef( | |||
1030 | getOrCreateType(Ty->getDecl()->getUnderlyingType(), Unit), | |||
1031 | Ty->getDecl()->getName(), getOrCreateFile(Loc), getLineNumber(Loc), | |||
1032 | getDeclContextDescriptor(Ty->getDecl())); | |||
1033 | } | |||
1034 | ||||
1035 | static unsigned getDwarfCC(CallingConv CC) { | |||
1036 | switch (CC) { | |||
1037 | case CC_C: | |||
1038 | // Avoid emitting DW_AT_calling_convention if the C convention was used. | |||
1039 | return 0; | |||
1040 | ||||
1041 | case CC_X86StdCall: | |||
1042 | return llvm::dwarf::DW_CC_BORLAND_stdcall; | |||
1043 | case CC_X86FastCall: | |||
1044 | return llvm::dwarf::DW_CC_BORLAND_msfastcall; | |||
1045 | case CC_X86ThisCall: | |||
1046 | return llvm::dwarf::DW_CC_BORLAND_thiscall; | |||
1047 | case CC_X86VectorCall: | |||
1048 | return llvm::dwarf::DW_CC_LLVM_vectorcall; | |||
1049 | case CC_X86Pascal: | |||
1050 | return llvm::dwarf::DW_CC_BORLAND_pascal; | |||
1051 | case CC_Win64: | |||
1052 | return llvm::dwarf::DW_CC_LLVM_Win64; | |||
1053 | case CC_X86_64SysV: | |||
1054 | return llvm::dwarf::DW_CC_LLVM_X86_64SysV; | |||
1055 | case CC_AAPCS: | |||
1056 | return llvm::dwarf::DW_CC_LLVM_AAPCS; | |||
1057 | case CC_AAPCS_VFP: | |||
1058 | return llvm::dwarf::DW_CC_LLVM_AAPCS_VFP; | |||
1059 | case CC_IntelOclBicc: | |||
1060 | return llvm::dwarf::DW_CC_LLVM_IntelOclBicc; | |||
1061 | case CC_SpirFunction: | |||
1062 | return llvm::dwarf::DW_CC_LLVM_SpirFunction; | |||
1063 | case CC_OpenCLKernel: | |||
1064 | return llvm::dwarf::DW_CC_LLVM_OpenCLKernel; | |||
1065 | case CC_Swift: | |||
1066 | return llvm::dwarf::DW_CC_LLVM_Swift; | |||
1067 | case CC_PreserveMost: | |||
1068 | return llvm::dwarf::DW_CC_LLVM_PreserveMost; | |||
1069 | case CC_PreserveAll: | |||
1070 | return llvm::dwarf::DW_CC_LLVM_PreserveAll; | |||
1071 | case CC_X86RegCall: | |||
1072 | return llvm::dwarf::DW_CC_LLVM_X86RegCall; | |||
1073 | } | |||
1074 | return 0; | |||
1075 | } | |||
1076 | ||||
1077 | llvm::DIType *CGDebugInfo::CreateType(const FunctionType *Ty, | |||
1078 | llvm::DIFile *Unit) { | |||
1079 | SmallVector<llvm::Metadata *, 16> EltTys; | |||
1080 | ||||
1081 | // Add the result type at least. | |||
1082 | EltTys.push_back(getOrCreateType(Ty->getReturnType(), Unit)); | |||
1083 | ||||
1084 | // Set up remainder of arguments if there is a prototype. | |||
1085 | // otherwise emit it as a variadic function. | |||
1086 | if (isa<FunctionNoProtoType>(Ty)) | |||
1087 | EltTys.push_back(DBuilder.createUnspecifiedParameter()); | |||
1088 | else if (const auto *FPT = dyn_cast<FunctionProtoType>(Ty)) { | |||
1089 | for (const QualType &ParamType : FPT->param_types()) | |||
1090 | EltTys.push_back(getOrCreateType(ParamType, Unit)); | |||
1091 | if (FPT->isVariadic()) | |||
1092 | EltTys.push_back(DBuilder.createUnspecifiedParameter()); | |||
1093 | } | |||
1094 | ||||
1095 | llvm::DITypeRefArray EltTypeArray = DBuilder.getOrCreateTypeArray(EltTys); | |||
1096 | return DBuilder.createSubroutineType(EltTypeArray, llvm::DINode::FlagZero, | |||
1097 | getDwarfCC(Ty->getCallConv())); | |||
1098 | } | |||
1099 | ||||
1100 | /// Convert an AccessSpecifier into the corresponding DINode flag. | |||
1101 | /// As an optimization, return 0 if the access specifier equals the | |||
1102 | /// default for the containing type. | |||
1103 | static llvm::DINode::DIFlags getAccessFlag(AccessSpecifier Access, | |||
1104 | const RecordDecl *RD) { | |||
1105 | AccessSpecifier Default = clang::AS_none; | |||
1106 | if (RD && RD->isClass()) | |||
1107 | Default = clang::AS_private; | |||
1108 | else if (RD && (RD->isStruct() || RD->isUnion())) | |||
1109 | Default = clang::AS_public; | |||
1110 | ||||
1111 | if (Access == Default) | |||
1112 | return llvm::DINode::FlagZero; | |||
1113 | ||||
1114 | switch (Access) { | |||
1115 | case clang::AS_private: | |||
1116 | return llvm::DINode::FlagPrivate; | |||
1117 | case clang::AS_protected: | |||
1118 | return llvm::DINode::FlagProtected; | |||
1119 | case clang::AS_public: | |||
1120 | return llvm::DINode::FlagPublic; | |||
1121 | case clang::AS_none: | |||
1122 | return llvm::DINode::FlagZero; | |||
1123 | } | |||
1124 | llvm_unreachable("unexpected access enumerator")::llvm::llvm_unreachable_internal("unexpected access enumerator" , "/build/llvm-toolchain-snapshot-7~svn338205/tools/clang/lib/CodeGen/CGDebugInfo.cpp" , 1124); | |||
1125 | } | |||
1126 | ||||
1127 | llvm::DIType *CGDebugInfo::createBitFieldType(const FieldDecl *BitFieldDecl, | |||
1128 | llvm::DIScope *RecordTy, | |||
1129 | const RecordDecl *RD) { | |||
1130 | StringRef Name = BitFieldDecl->getName(); | |||
1131 | QualType Ty = BitFieldDecl->getType(); | |||
1132 | SourceLocation Loc = BitFieldDecl->getLocation(); | |||
1133 | llvm::DIFile *VUnit = getOrCreateFile(Loc); | |||
1134 | llvm::DIType *DebugType = getOrCreateType(Ty, VUnit); | |||
1135 | ||||
1136 | // Get the location for the field. | |||
1137 | llvm::DIFile *File = getOrCreateFile(Loc); | |||
1138 | unsigned Line = getLineNumber(Loc); | |||
1139 | ||||
1140 | const CGBitFieldInfo &BitFieldInfo = | |||
1141 | CGM.getTypes().getCGRecordLayout(RD).getBitFieldInfo(BitFieldDecl); | |||
1142 | uint64_t SizeInBits = BitFieldInfo.Size; | |||
1143 | assert(SizeInBits > 0 && "found named 0-width bitfield")(static_cast <bool> (SizeInBits > 0 && "found named 0-width bitfield" ) ? void (0) : __assert_fail ("SizeInBits > 0 && \"found named 0-width bitfield\"" , "/build/llvm-toolchain-snapshot-7~svn338205/tools/clang/lib/CodeGen/CGDebugInfo.cpp" , 1143, __extension__ __PRETTY_FUNCTION__)); | |||
1144 | uint64_t StorageOffsetInBits = | |||
1145 | CGM.getContext().toBits(BitFieldInfo.StorageOffset); | |||
1146 | uint64_t Offset = BitFieldInfo.Offset; | |||
1147 | // The bit offsets for big endian machines are reversed for big | |||
1148 | // endian target, compensate for that as the DIDerivedType requires | |||
1149 | // un-reversed offsets. | |||
1150 | if (CGM.getDataLayout().isBigEndian()) | |||
1151 | Offset = BitFieldInfo.StorageSize - BitFieldInfo.Size - Offset; | |||
1152 | uint64_t OffsetInBits = StorageOffsetInBits + Offset; | |||
1153 | llvm::DINode::DIFlags Flags = getAccessFlag(BitFieldDecl->getAccess(), RD); | |||
1154 | return DBuilder.createBitFieldMemberType( | |||
1155 | RecordTy, Name, File, Line, SizeInBits, OffsetInBits, StorageOffsetInBits, | |||
1156 | Flags, DebugType); | |||
1157 | } | |||
1158 | ||||
1159 | llvm::DIType * | |||
1160 | CGDebugInfo::createFieldType(StringRef name, QualType type, SourceLocation loc, | |||
1161 | AccessSpecifier AS, uint64_t offsetInBits, | |||
1162 | uint32_t AlignInBits, llvm::DIFile *tunit, | |||
1163 | llvm::DIScope *scope, const RecordDecl *RD) { | |||
1164 | llvm::DIType *debugType = getOrCreateType(type, tunit); | |||
1165 | ||||
1166 | // Get the location for the field. | |||
1167 | llvm::DIFile *file = getOrCreateFile(loc); | |||
1168 | unsigned line = getLineNumber(loc); | |||
1169 | ||||
1170 | uint64_t SizeInBits = 0; | |||
1171 | auto Align = AlignInBits; | |||
1172 | if (!type->isIncompleteArrayType()) { | |||
1173 | TypeInfo TI = CGM.getContext().getTypeInfo(type); | |||
1174 | SizeInBits = TI.Width; | |||
1175 | if (!Align) | |||
1176 | Align = getTypeAlignIfRequired(type, CGM.getContext()); | |||
1177 | } | |||
1178 | ||||
1179 | llvm::DINode::DIFlags flags = getAccessFlag(AS, RD); | |||
1180 | return DBuilder.createMemberType(scope, name, file, line, SizeInBits, Align, | |||
1181 | offsetInBits, flags, debugType); | |||
1182 | } | |||
1183 | ||||
1184 | void CGDebugInfo::CollectRecordLambdaFields( | |||
1185 | const CXXRecordDecl *CXXDecl, SmallVectorImpl<llvm::Metadata *> &elements, | |||
1186 | llvm::DIType *RecordTy) { | |||
1187 | // For C++11 Lambdas a Field will be the same as a Capture, but the Capture | |||
1188 | // has the name and the location of the variable so we should iterate over | |||
1189 | // both concurrently. | |||
1190 | const ASTRecordLayout &layout = CGM.getContext().getASTRecordLayout(CXXDecl); | |||
1191 | RecordDecl::field_iterator Field = CXXDecl->field_begin(); | |||
1192 | unsigned fieldno = 0; | |||
1193 | for (CXXRecordDecl::capture_const_iterator I = CXXDecl->captures_begin(), | |||
1194 | E = CXXDecl->captures_end(); | |||
1195 | I != E; ++I, ++Field, ++fieldno) { | |||
1196 | const LambdaCapture &C = *I; | |||
1197 | if (C.capturesVariable()) { | |||
1198 | SourceLocation Loc = C.getLocation(); | |||
1199 | assert(!Field->isBitField() && "lambdas don't have bitfield members!")(static_cast <bool> (!Field->isBitField() && "lambdas don't have bitfield members!") ? void (0) : __assert_fail ("!Field->isBitField() && \"lambdas don't have bitfield members!\"" , "/build/llvm-toolchain-snapshot-7~svn338205/tools/clang/lib/CodeGen/CGDebugInfo.cpp" , 1199, __extension__ __PRETTY_FUNCTION__)); | |||
1200 | VarDecl *V = C.getCapturedVar(); | |||
1201 | StringRef VName = V->getName(); | |||
1202 | llvm::DIFile *VUnit = getOrCreateFile(Loc); | |||
1203 | auto Align = getDeclAlignIfRequired(V, CGM.getContext()); | |||
1204 | llvm::DIType *FieldType = createFieldType( | |||
1205 | VName, Field->getType(), Loc, Field->getAccess(), | |||
1206 | layout.getFieldOffset(fieldno), Align, VUnit, RecordTy, CXXDecl); | |||
1207 | elements.push_back(FieldType); | |||
1208 | } else if (C.capturesThis()) { | |||
1209 | // TODO: Need to handle 'this' in some way by probably renaming the | |||
1210 | // this of the lambda class and having a field member of 'this' or | |||
1211 | // by using AT_object_pointer for the function and having that be | |||
1212 | // used as 'this' for semantic references. | |||
1213 | FieldDecl *f = *Field; | |||
1214 | llvm::DIFile *VUnit = getOrCreateFile(f->getLocation()); | |||
1215 | QualType type = f->getType(); | |||
1216 | llvm::DIType *fieldType = createFieldType( | |||
1217 | "this", type, f->getLocation(), f->getAccess(), | |||
1218 | layout.getFieldOffset(fieldno), VUnit, RecordTy, CXXDecl); | |||
1219 | ||||
1220 | elements.push_back(fieldType); | |||
1221 | } | |||
1222 | } | |||
1223 | } | |||
1224 | ||||
1225 | llvm::DIDerivedType * | |||
1226 | CGDebugInfo::CreateRecordStaticField(const VarDecl *Var, llvm::DIType *RecordTy, | |||
1227 | const RecordDecl *RD) { | |||
1228 | // Create the descriptor for the static variable, with or without | |||
1229 | // constant initializers. | |||
1230 | Var = Var->getCanonicalDecl(); | |||
1231 | llvm::DIFile *VUnit = getOrCreateFile(Var->getLocation()); | |||
1232 | llvm::DIType *VTy = getOrCreateType(Var->getType(), VUnit); | |||
1233 | ||||
1234 | unsigned LineNumber = getLineNumber(Var->getLocation()); | |||
1235 | StringRef VName = Var->getName(); | |||
1236 | llvm::Constant *C = nullptr; | |||
1237 | if (Var->getInit()) { | |||
1238 | const APValue *Value = Var->evaluateValue(); | |||
1239 | if (Value) { | |||
1240 | if (Value->isInt()) | |||
1241 | C = llvm::ConstantInt::get(CGM.getLLVMContext(), Value->getInt()); | |||
1242 | if (Value->isFloat()) | |||
1243 | C = llvm::ConstantFP::get(CGM.getLLVMContext(), Value->getFloat()); | |||
1244 | } | |||
1245 | } | |||
1246 | ||||
1247 | llvm::DINode::DIFlags Flags = getAccessFlag(Var->getAccess(), RD); | |||
1248 | auto Align = getDeclAlignIfRequired(Var, CGM.getContext()); | |||
1249 | llvm::DIDerivedType *GV = DBuilder.createStaticMemberType( | |||
1250 | RecordTy, VName, VUnit, LineNumber, VTy, Flags, C, Align); | |||
1251 | StaticDataMemberCache[Var->getCanonicalDecl()].reset(GV); | |||
1252 | return GV; | |||
1253 | } | |||
1254 | ||||
1255 | void CGDebugInfo::CollectRecordNormalField( | |||
1256 | const FieldDecl *field, uint64_t OffsetInBits, llvm::DIFile *tunit, | |||
1257 | SmallVectorImpl<llvm::Metadata *> &elements, llvm::DIType *RecordTy, | |||
1258 | const RecordDecl *RD) { | |||
1259 | StringRef name = field->getName(); | |||
1260 | QualType type = field->getType(); | |||
1261 | ||||
1262 | // Ignore unnamed fields unless they're anonymous structs/unions. | |||
1263 | if (name.empty() && !type->isRecordType()) | |||
1264 | return; | |||
1265 | ||||
1266 | llvm::DIType *FieldType; | |||
1267 | if (field->isBitField()) { | |||
1268 | FieldType = createBitFieldType(field, RecordTy, RD); | |||
1269 | } else { | |||
1270 | auto Align = getDeclAlignIfRequired(field, CGM.getContext()); | |||
1271 | FieldType = | |||
1272 | createFieldType(name, type, field->getLocation(), field->getAccess(), | |||
1273 | OffsetInBits, Align, tunit, RecordTy, RD); | |||
1274 | } | |||
1275 | ||||
1276 | elements.push_back(FieldType); | |||
1277 | } | |||
1278 | ||||
1279 | void CGDebugInfo::CollectRecordNestedType( | |||
1280 | const TypeDecl *TD, SmallVectorImpl<llvm::Metadata *> &elements) { | |||
1281 | QualType Ty = CGM.getContext().getTypeDeclType(TD); | |||
1282 | // Injected class names are not considered nested records. | |||
1283 | if (isa<InjectedClassNameType>(Ty)) | |||
1284 | return; | |||
1285 | SourceLocation Loc = TD->getLocation(); | |||
1286 | llvm::DIType *nestedType = getOrCreateType(Ty, getOrCreateFile(Loc)); | |||
1287 | elements.push_back(nestedType); | |||
1288 | } | |||
1289 | ||||
1290 | void CGDebugInfo::CollectRecordFields( | |||
1291 | const RecordDecl *record, llvm::DIFile *tunit, | |||
1292 | SmallVectorImpl<llvm::Metadata *> &elements, | |||
1293 | llvm::DICompositeType *RecordTy) { | |||
1294 | const auto *CXXDecl = dyn_cast<CXXRecordDecl>(record); | |||
1295 | ||||
1296 | if (CXXDecl && CXXDecl->isLambda()) | |||
1297 | CollectRecordLambdaFields(CXXDecl, elements, RecordTy); | |||
1298 | else { | |||
1299 | const ASTRecordLayout &layout = CGM.getContext().getASTRecordLayout(record); | |||
1300 | ||||
1301 | // Field number for non-static fields. | |||
1302 | unsigned fieldNo = 0; | |||
1303 | ||||
1304 | // Static and non-static members should appear in the same order as | |||
1305 | // the corresponding declarations in the source program. | |||
1306 | for (const auto *I : record->decls()) | |||
1307 | if (const auto *V = dyn_cast<VarDecl>(I)) { | |||
1308 | if (V->hasAttr<NoDebugAttr>()) | |||
1309 | continue; | |||
1310 | ||||
1311 | // Skip variable template specializations when emitting CodeView. MSVC | |||
1312 | // doesn't emit them. | |||
1313 | if (CGM.getCodeGenOpts().EmitCodeView && | |||
1314 | isa<VarTemplateSpecializationDecl>(V)) | |||
1315 | continue; | |||
1316 | ||||
1317 | // Reuse the existing static member declaration if one exists | |||
1318 | auto MI = StaticDataMemberCache.find(V->getCanonicalDecl()); | |||
1319 | if (MI != StaticDataMemberCache.end()) { | |||
1320 | assert(MI->second &&(static_cast <bool> (MI->second && "Static data member declaration should still exist" ) ? void (0) : __assert_fail ("MI->second && \"Static data member declaration should still exist\"" , "/build/llvm-toolchain-snapshot-7~svn338205/tools/clang/lib/CodeGen/CGDebugInfo.cpp" , 1321, __extension__ __PRETTY_FUNCTION__)) | |||
1321 | "Static data member declaration should still exist")(static_cast <bool> (MI->second && "Static data member declaration should still exist" ) ? void (0) : __assert_fail ("MI->second && \"Static data member declaration should still exist\"" , "/build/llvm-toolchain-snapshot-7~svn338205/tools/clang/lib/CodeGen/CGDebugInfo.cpp" , 1321, __extension__ __PRETTY_FUNCTION__)); | |||
1322 | elements.push_back(MI->second); | |||
1323 | } else { | |||
1324 | auto Field = CreateRecordStaticField(V, RecordTy, record); | |||
1325 | elements.push_back(Field); | |||
1326 | } | |||
1327 | } else if (const auto *field = dyn_cast<FieldDecl>(I)) { | |||
1328 | CollectRecordNormalField(field, layout.getFieldOffset(fieldNo), tunit, | |||
1329 | elements, RecordTy, record); | |||
1330 | ||||
1331 | // Bump field number for next field. | |||
1332 | ++fieldNo; | |||
1333 | } else if (CGM.getCodeGenOpts().EmitCodeView) { | |||
1334 | // Debug info for nested types is included in the member list only for | |||
1335 | // CodeView. | |||
1336 | if (const auto *nestedType = dyn_cast<TypeDecl>(I)) | |||
1337 | if (!nestedType->isImplicit() && | |||
1338 | nestedType->getDeclContext() == record) | |||
1339 | CollectRecordNestedType(nestedType, elements); | |||
1340 | } | |||
1341 | } | |||
1342 | } | |||
1343 | ||||
1344 | llvm::DISubroutineType * | |||
1345 | CGDebugInfo::getOrCreateMethodType(const CXXMethodDecl *Method, | |||
1346 | llvm::DIFile *Unit) { | |||
1347 | const FunctionProtoType *Func = Method->getType()->getAs<FunctionProtoType>(); | |||
1348 | if (Method->isStatic()) | |||
1349 | return cast_or_null<llvm::DISubroutineType>( | |||
1350 | getOrCreateType(QualType(Func, 0), Unit)); | |||
1351 | return getOrCreateInstanceMethodType(Method->getThisType(CGM.getContext()), | |||
1352 | Func, Unit); | |||
1353 | } | |||
1354 | ||||
1355 | llvm::DISubroutineType *CGDebugInfo::getOrCreateInstanceMethodType( | |||
1356 | QualType ThisPtr, const FunctionProtoType *Func, llvm::DIFile *Unit) { | |||
1357 | // Add "this" pointer. | |||
1358 | llvm::DITypeRefArray Args( | |||
1359 | cast<llvm::DISubroutineType>(getOrCreateType(QualType(Func, 0), Unit)) | |||
1360 | ->getTypeArray()); | |||
1361 | assert(Args.size() && "Invalid number of arguments!")(static_cast <bool> (Args.size() && "Invalid number of arguments!" ) ? void (0) : __assert_fail ("Args.size() && \"Invalid number of arguments!\"" , "/build/llvm-toolchain-snapshot-7~svn338205/tools/clang/lib/CodeGen/CGDebugInfo.cpp" , 1361, __extension__ __PRETTY_FUNCTION__)); | |||
1362 | ||||
1363 | SmallVector<llvm::Metadata *, 16> Elts; | |||
1364 | ||||
1365 | // First element is always return type. For 'void' functions it is NULL. | |||
1366 | Elts.push_back(Args[0]); | |||
1367 | ||||
1368 | // "this" pointer is always first argument. | |||
1369 | const CXXRecordDecl *RD = ThisPtr->getPointeeCXXRecordDecl(); | |||
1370 | if (isa<ClassTemplateSpecializationDecl>(RD)) { | |||
1371 | // Create pointer type directly in this case. | |||
1372 | const PointerType *ThisPtrTy = cast<PointerType>(ThisPtr); | |||
1373 | QualType PointeeTy = ThisPtrTy->getPointeeType(); | |||
1374 | unsigned AS = CGM.getContext().getTargetAddressSpace(PointeeTy); | |||
1375 | uint64_t Size = CGM.getTarget().getPointerWidth(AS); | |||
1376 | auto Align = getTypeAlignIfRequired(ThisPtrTy, CGM.getContext()); | |||
1377 | llvm::DIType *PointeeType = getOrCreateType(PointeeTy, Unit); | |||
1378 | llvm::DIType *ThisPtrType = | |||
1379 | DBuilder.createPointerType(PointeeType, Size, Align); | |||
1380 | TypeCache[ThisPtr.getAsOpaquePtr()].reset(ThisPtrType); | |||
1381 | // TODO: This and the artificial type below are misleading, the | |||
1382 | // types aren't artificial the argument is, but the current | |||
1383 | // metadata doesn't represent that. | |||
1384 | ThisPtrType = DBuilder.createObjectPointerType(ThisPtrType); | |||
1385 | Elts.push_back(ThisPtrType); | |||
1386 | } else { | |||
1387 | llvm::DIType *ThisPtrType = getOrCreateType(ThisPtr, Unit); | |||
1388 | TypeCache[ThisPtr.getAsOpaquePtr()].reset(ThisPtrType); | |||
1389 | ThisPtrType = DBuilder.createObjectPointerType(ThisPtrType); | |||
1390 | Elts.push_back(ThisPtrType); | |||
1391 | } | |||
1392 | ||||
1393 | // Copy rest of the arguments. | |||
1394 | for (unsigned i = 1, e = Args.size(); i != e; ++i) | |||
1395 | Elts.push_back(Args[i]); | |||
1396 | ||||
1397 | llvm::DITypeRefArray EltTypeArray = DBuilder.getOrCreateTypeArray(Elts); | |||
1398 | ||||
1399 | llvm::DINode::DIFlags Flags = llvm::DINode::FlagZero; | |||
1400 | if (Func->getExtProtoInfo().RefQualifier == RQ_LValue) | |||
1401 | Flags |= llvm::DINode::FlagLValueReference; | |||
1402 | if (Func->getExtProtoInfo().RefQualifier == RQ_RValue) | |||
1403 | Flags |= llvm::DINode::FlagRValueReference; | |||
1404 | ||||
1405 | return DBuilder.createSubroutineType(EltTypeArray, Flags, | |||
1406 | getDwarfCC(Func->getCallConv())); | |||
1407 | } | |||
1408 | ||||
1409 | /// isFunctionLocalClass - Return true if CXXRecordDecl is defined | |||
1410 | /// inside a function. | |||
1411 | static bool isFunctionLocalClass(const CXXRecordDecl *RD) { | |||
1412 | if (const auto *NRD = dyn_cast<CXXRecordDecl>(RD->getDeclContext())) | |||
1413 | return isFunctionLocalClass(NRD); | |||
1414 | if (isa<FunctionDecl>(RD->getDeclContext())) | |||
1415 | return true; | |||
1416 | return false; | |||
1417 | } | |||
1418 | ||||
1419 | llvm::DISubprogram *CGDebugInfo::CreateCXXMemberFunction( | |||
1420 | const CXXMethodDecl *Method, llvm::DIFile *Unit, llvm::DIType *RecordTy) { | |||
1421 | bool IsCtorOrDtor = | |||
1422 | isa<CXXConstructorDecl>(Method) || isa<CXXDestructorDecl>(Method); | |||
1423 | ||||
1424 | StringRef MethodName = getFunctionName(Method); | |||
1425 | llvm::DISubroutineType *MethodTy = getOrCreateMethodType(Method, Unit); | |||
1426 | ||||
1427 | // Since a single ctor/dtor corresponds to multiple functions, it doesn't | |||
1428 | // make sense to give a single ctor/dtor a linkage name. | |||
1429 | StringRef MethodLinkageName; | |||
1430 | // FIXME: 'isFunctionLocalClass' seems like an arbitrary/unintentional | |||
1431 | // property to use here. It may've been intended to model "is non-external | |||
1432 | // type" but misses cases of non-function-local but non-external classes such | |||
1433 | // as those in anonymous namespaces as well as the reverse - external types | |||
1434 | // that are function local, such as those in (non-local) inline functions. | |||
1435 | if (!IsCtorOrDtor && !isFunctionLocalClass(Method->getParent())) | |||
1436 | MethodLinkageName = CGM.getMangledName(Method); | |||
1437 | ||||
1438 | // Get the location for the method. | |||
1439 | llvm::DIFile *MethodDefUnit = nullptr; | |||
1440 | unsigned MethodLine = 0; | |||
1441 | if (!Method->isImplicit()) { | |||
1442 | MethodDefUnit = getOrCreateFile(Method->getLocation()); | |||
1443 | MethodLine = getLineNumber(Method->getLocation()); | |||
1444 | } | |||
1445 | ||||
1446 | // Collect virtual method info. | |||
1447 | llvm::DIType *ContainingType = nullptr; | |||
1448 | unsigned Virtuality = 0; | |||
1449 | unsigned VIndex = 0; | |||
1450 | llvm::DINode::DIFlags Flags = llvm::DINode::FlagZero; | |||
1451 | int ThisAdjustment = 0; | |||
1452 | ||||
1453 | if (Method->isVirtual()) { | |||
1454 | if (Method->isPure()) | |||
1455 | Virtuality = llvm::dwarf::DW_VIRTUALITY_pure_virtual; | |||
1456 | else | |||
1457 | Virtuality = llvm::dwarf::DW_VIRTUALITY_virtual; | |||
1458 | ||||
1459 | if (CGM.getTarget().getCXXABI().isItaniumFamily()) { | |||
1460 | // It doesn't make sense to give a virtual destructor a vtable index, | |||
1461 | // since a single destructor has two entries in the vtable. | |||
1462 | if (!isa<CXXDestructorDecl>(Method)) | |||
1463 | VIndex = CGM.getItaniumVTableContext().getMethodVTableIndex(Method); | |||
1464 | } else { | |||
1465 | // Emit MS ABI vftable information. There is only one entry for the | |||
1466 | // deleting dtor. | |||
1467 | const auto *DD = dyn_cast<CXXDestructorDecl>(Method); | |||
1468 | GlobalDecl GD = DD ? GlobalDecl(DD, Dtor_Deleting) : GlobalDecl(Method); | |||
1469 | MethodVFTableLocation ML = | |||
1470 | CGM.getMicrosoftVTableContext().getMethodVFTableLocation(GD); | |||
1471 | VIndex = ML.Index; | |||
1472 | ||||
1473 | // CodeView only records the vftable offset in the class that introduces | |||
1474 | // the virtual method. This is possible because, unlike Itanium, the MS | |||
1475 | // C++ ABI does not include all virtual methods from non-primary bases in | |||
1476 | // the vtable for the most derived class. For example, if C inherits from | |||
1477 | // A and B, C's primary vftable will not include B's virtual methods. | |||
1478 | if (Method->size_overridden_methods() == 0) | |||
1479 | Flags |= llvm::DINode::FlagIntroducedVirtual; | |||
1480 | ||||
1481 | // The 'this' adjustment accounts for both the virtual and non-virtual | |||
1482 | // portions of the adjustment. Presumably the debugger only uses it when | |||
1483 | // it knows the dynamic type of an object. | |||
1484 | ThisAdjustment = CGM.getCXXABI() | |||
1485 | .getVirtualFunctionPrologueThisAdjustment(GD) | |||
1486 | .getQuantity(); | |||
1487 | } | |||
1488 | ContainingType = RecordTy; | |||
1489 | } | |||
1490 | ||||
1491 | if (Method->isStatic()) | |||
1492 | Flags |= llvm::DINode::FlagStaticMember; | |||
1493 | if (Method->isImplicit()) | |||
1494 | Flags |= llvm::DINode::FlagArtificial; | |||
1495 | Flags |= getAccessFlag(Method->getAccess(), Method->getParent()); | |||
1496 | if (const auto *CXXC = dyn_cast<CXXConstructorDecl>(Method)) { | |||
1497 | if (CXXC->isExplicit()) | |||
1498 | Flags |= llvm::DINode::FlagExplicit; | |||
1499 | } else if (const auto *CXXC = dyn_cast<CXXConversionDecl>(Method)) { | |||
1500 | if (CXXC->isExplicit()) | |||
1501 | Flags |= llvm::DINode::FlagExplicit; | |||
1502 | } | |||
1503 | if (Method->hasPrototype()) | |||
1504 | Flags |= llvm::DINode::FlagPrototyped; | |||
1505 | if (Method->getRefQualifier() == RQ_LValue) | |||
1506 | Flags |= llvm::DINode::FlagLValueReference; | |||
1507 | if (Method->getRefQualifier() == RQ_RValue) | |||
1508 | Flags |= llvm::DINode::FlagRValueReference; | |||
1509 | ||||
1510 | llvm::DINodeArray TParamsArray = CollectFunctionTemplateParams(Method, Unit); | |||
1511 | llvm::DISubprogram *SP = DBuilder.createMethod( | |||
1512 | RecordTy, MethodName, MethodLinkageName, MethodDefUnit, MethodLine, | |||
1513 | MethodTy, /*isLocalToUnit=*/false, /*isDefinition=*/false, Virtuality, | |||
1514 | VIndex, ThisAdjustment, ContainingType, Flags, CGM.getLangOpts().Optimize, | |||
1515 | TParamsArray.get()); | |||
1516 | ||||
1517 | SPCache[Method->getCanonicalDecl()].reset(SP); | |||
1518 | ||||
1519 | return SP; | |||
1520 | } | |||
1521 | ||||
1522 | void CGDebugInfo::CollectCXXMemberFunctions( | |||
1523 | const CXXRecordDecl *RD, llvm::DIFile *Unit, | |||
1524 | SmallVectorImpl<llvm::Metadata *> &EltTys, llvm::DIType *RecordTy) { | |||
1525 | ||||
1526 | // Since we want more than just the individual member decls if we | |||
1527 | // have templated functions iterate over every declaration to gather | |||
1528 | // the functions. | |||
1529 | for (const auto *I : RD->decls()) { | |||
1530 | const auto *Method = dyn_cast<CXXMethodDecl>(I); | |||
1531 | // If the member is implicit, don't add it to the member list. This avoids | |||
1532 | // the member being added to type units by LLVM, while still allowing it | |||
1533 | // to be emitted into the type declaration/reference inside the compile | |||
1534 | // unit. | |||
1535 | // Ditto 'nodebug' methods, for consistency with CodeGenFunction.cpp. | |||
1536 | // FIXME: Handle Using(Shadow?)Decls here to create | |||
1537 | // DW_TAG_imported_declarations inside the class for base decls brought into | |||
1538 | // derived classes. GDB doesn't seem to notice/leverage these when I tried | |||
1539 | // it, so I'm not rushing to fix this. (GCC seems to produce them, if | |||
1540 | // referenced) | |||
1541 | if (!Method || Method->isImplicit() || Method->hasAttr<NoDebugAttr>()) | |||
1542 | continue; | |||
1543 | ||||
1544 | if (Method->getType()->getAs<FunctionProtoType>()->getContainedAutoType()) | |||
1545 | continue; | |||
1546 | ||||
1547 | // Reuse the existing member function declaration if it exists. | |||
1548 | // It may be associated with the declaration of the type & should be | |||
1549 | // reused as we're building the definition. | |||
1550 | // | |||
1551 | // This situation can arise in the vtable-based debug info reduction where | |||
1552 | // implicit members are emitted in a non-vtable TU. | |||
1553 | auto MI = SPCache.find(Method->getCanonicalDecl()); | |||
1554 | EltTys.push_back(MI == SPCache.end() | |||
1555 | ? CreateCXXMemberFunction(Method, Unit, RecordTy) | |||
1556 | : static_cast<llvm::Metadata *>(MI->second)); | |||
1557 | } | |||
1558 | } | |||
1559 | ||||
1560 | void CGDebugInfo::CollectCXXBases(const CXXRecordDecl *RD, llvm::DIFile *Unit, | |||
1561 | SmallVectorImpl<llvm::Metadata *> &EltTys, | |||
1562 | llvm::DIType *RecordTy) { | |||
1563 | llvm::DenseSet<CanonicalDeclPtr<const CXXRecordDecl>> SeenTypes; | |||
1564 | CollectCXXBasesAux(RD, Unit, EltTys, RecordTy, RD->bases(), SeenTypes, | |||
1565 | llvm::DINode::FlagZero); | |||
1566 | ||||
1567 | // If we are generating CodeView debug info, we also need to emit records for | |||
1568 | // indirect virtual base classes. | |||
1569 | if (CGM.getCodeGenOpts().EmitCodeView) { | |||
1570 | CollectCXXBasesAux(RD, Unit, EltTys, RecordTy, RD->vbases(), SeenTypes, | |||
1571 | llvm::DINode::FlagIndirectVirtualBase); | |||
1572 | } | |||
1573 | } | |||
1574 | ||||
1575 | void CGDebugInfo::CollectCXXBasesAux( | |||
1576 | const CXXRecordDecl *RD, llvm::DIFile *Unit, | |||
1577 | SmallVectorImpl<llvm::Metadata *> &EltTys, llvm::DIType *RecordTy, | |||
1578 | const CXXRecordDecl::base_class_const_range &Bases, | |||
1579 | llvm::DenseSet<CanonicalDeclPtr<const CXXRecordDecl>> &SeenTypes, | |||
1580 | llvm::DINode::DIFlags StartingFlags) { | |||
1581 | const ASTRecordLayout &RL = CGM.getContext().getASTRecordLayout(RD); | |||
1582 | for (const auto &BI : Bases) { | |||
1583 | const auto *Base = | |||
1584 | cast<CXXRecordDecl>(BI.getType()->getAs<RecordType>()->getDecl()); | |||
1585 | if (!SeenTypes.insert(Base).second) | |||
1586 | continue; | |||
1587 | auto *BaseTy = getOrCreateType(BI.getType(), Unit); | |||
1588 | llvm::DINode::DIFlags BFlags = StartingFlags; | |||
1589 | uint64_t BaseOffset; | |||
1590 | uint32_t VBPtrOffset = 0; | |||
1591 | ||||
1592 | if (BI.isVirtual()) { | |||
1593 | if (CGM.getTarget().getCXXABI().isItaniumFamily()) { | |||
1594 | // virtual base offset offset is -ve. The code generator emits dwarf | |||
1595 | // expression where it expects +ve number. | |||
1596 | BaseOffset = 0 - CGM.getItaniumVTableContext() | |||
1597 | .getVirtualBaseOffsetOffset(RD, Base) | |||
1598 | .getQuantity(); | |||
1599 | } else { | |||
1600 | // In the MS ABI, store the vbtable offset, which is analogous to the | |||
1601 | // vbase offset offset in Itanium. | |||
1602 | BaseOffset = | |||
1603 | 4 * CGM.getMicrosoftVTableContext().getVBTableIndex(RD, Base); | |||
1604 | VBPtrOffset = CGM.getContext() | |||
1605 | .getASTRecordLayout(RD) | |||
1606 | .getVBPtrOffset() | |||
1607 | .getQuantity(); | |||
1608 | } | |||
1609 | BFlags |= llvm::DINode::FlagVirtual; | |||
1610 | } else | |||
1611 | BaseOffset = CGM.getContext().toBits(RL.getBaseClassOffset(Base)); | |||
1612 | // FIXME: Inconsistent units for BaseOffset. It is in bytes when | |||
1613 | // BI->isVirtual() and bits when not. | |||
1614 | ||||
1615 | BFlags |= getAccessFlag(BI.getAccessSpecifier(), RD); | |||
1616 | llvm::DIType *DTy = DBuilder.createInheritance(RecordTy, BaseTy, BaseOffset, | |||
1617 | VBPtrOffset, BFlags); | |||
1618 | EltTys.push_back(DTy); | |||
1619 | } | |||
1620 | } | |||
1621 | ||||
1622 | llvm::DINodeArray | |||
1623 | CGDebugInfo::CollectTemplateParams(const TemplateParameterList *TPList, | |||
1624 | ArrayRef<TemplateArgument> TAList, | |||
1625 | llvm::DIFile *Unit) { | |||
1626 | SmallVector<llvm::Metadata *, 16> TemplateParams; | |||
1627 | for (unsigned i = 0, e = TAList.size(); i != e; ++i) { | |||
1628 | const TemplateArgument &TA = TAList[i]; | |||
1629 | StringRef Name; | |||
1630 | if (TPList) | |||
1631 | Name = TPList->getParam(i)->getName(); | |||
1632 | switch (TA.getKind()) { | |||
1633 | case TemplateArgument::Type: { | |||
1634 | llvm::DIType *TTy = getOrCreateType(TA.getAsType(), Unit); | |||
1635 | TemplateParams.push_back( | |||
1636 | DBuilder.createTemplateTypeParameter(TheCU, Name, TTy)); | |||
1637 | } break; | |||
1638 | case TemplateArgument::Integral: { | |||
1639 | llvm::DIType *TTy = getOrCreateType(TA.getIntegralType(), Unit); | |||
1640 | TemplateParams.push_back(DBuilder.createTemplateValueParameter( | |||
1641 | TheCU, Name, TTy, | |||
1642 | llvm::ConstantInt::get(CGM.getLLVMContext(), TA.getAsIntegral()))); | |||
1643 | } break; | |||
1644 | case TemplateArgument::Declaration: { | |||
1645 | const ValueDecl *D = TA.getAsDecl(); | |||
1646 | QualType T = TA.getParamTypeForDecl().getDesugaredType(CGM.getContext()); | |||
1647 | llvm::DIType *TTy = getOrCreateType(T, Unit); | |||
1648 | llvm::Constant *V = nullptr; | |||
1649 | const CXXMethodDecl *MD; | |||
1650 | // Variable pointer template parameters have a value that is the address | |||
1651 | // of the variable. | |||
1652 | if (const auto *VD = dyn_cast<VarDecl>(D)) | |||
1653 | V = CGM.GetAddrOfGlobalVar(VD); | |||
1654 | // Member function pointers have special support for building them, though | |||
1655 | // this is currently unsupported in LLVM CodeGen. | |||
1656 | else if ((MD = dyn_cast<CXXMethodDecl>(D)) && MD->isInstance()) | |||
1657 | V = CGM.getCXXABI().EmitMemberFunctionPointer(MD); | |||
1658 | else if (const auto *FD = dyn_cast<FunctionDecl>(D)) | |||
1659 | V = CGM.GetAddrOfFunction(FD); | |||
1660 | // Member data pointers have special handling too to compute the fixed | |||
1661 | // offset within the object. | |||
1662 | else if (const auto *MPT = dyn_cast<MemberPointerType>(T.getTypePtr())) { | |||
1663 | // These five lines (& possibly the above member function pointer | |||
1664 | // handling) might be able to be refactored to use similar code in | |||
1665 | // CodeGenModule::getMemberPointerConstant | |||
1666 | uint64_t fieldOffset = CGM.getContext().getFieldOffset(D); | |||
1667 | CharUnits chars = | |||
1668 | CGM.getContext().toCharUnitsFromBits((int64_t)fieldOffset); | |||
1669 | V = CGM.getCXXABI().EmitMemberDataPointer(MPT, chars); | |||
1670 | } | |||
1671 | TemplateParams.push_back(DBuilder.createTemplateValueParameter( | |||
1672 | TheCU, Name, TTy, | |||
1673 | cast_or_null<llvm::Constant>(V->stripPointerCasts()))); | |||
1674 | } break; | |||
1675 | case TemplateArgument::NullPtr: { | |||
1676 | QualType T = TA.getNullPtrType(); | |||
1677 | llvm::DIType *TTy = getOrCreateType(T, Unit); | |||
1678 | llvm::Constant *V = nullptr; | |||
1679 | // Special case member data pointer null values since they're actually -1 | |||
1680 | // instead of zero. | |||
1681 | if (const auto *MPT = dyn_cast<MemberPointerType>(T.getTypePtr())) | |||
1682 | // But treat member function pointers as simple zero integers because | |||
1683 | // it's easier than having a special case in LLVM's CodeGen. If LLVM | |||
1684 | // CodeGen grows handling for values of non-null member function | |||
1685 | // pointers then perhaps we could remove this special case and rely on | |||
1686 | // EmitNullMemberPointer for member function pointers. | |||
1687 | if (MPT->isMemberDataPointer()) | |||
1688 | V = CGM.getCXXABI().EmitNullMemberPointer(MPT); | |||
1689 | if (!V) | |||
1690 | V = llvm::ConstantInt::get(CGM.Int8Ty, 0); | |||
1691 | TemplateParams.push_back( | |||
1692 | DBuilder.createTemplateValueParameter(TheCU, Name, TTy, V)); | |||
1693 | } break; | |||
1694 | case TemplateArgument::Template: | |||
1695 | TemplateParams.push_back(DBuilder.createTemplateTemplateParameter( | |||
1696 | TheCU, Name, nullptr, | |||
1697 | TA.getAsTemplate().getAsTemplateDecl()->getQualifiedNameAsString())); | |||
1698 | break; | |||
1699 | case TemplateArgument::Pack: | |||
1700 | TemplateParams.push_back(DBuilder.createTemplateParameterPack( | |||
1701 | TheCU, Name, nullptr, | |||
1702 | CollectTemplateParams(nullptr, TA.getPackAsArray(), Unit))); | |||
1703 | break; | |||
1704 | case TemplateArgument::Expression: { | |||
1705 | const Expr *E = TA.getAsExpr(); | |||
1706 | QualType T = E->getType(); | |||
1707 | if (E->isGLValue()) | |||
1708 | T = CGM.getContext().getLValueReferenceType(T); | |||
1709 | llvm::Constant *V = ConstantEmitter(CGM).emitAbstract(E, T); | |||
1710 | assert(V && "Expression in template argument isn't constant")(static_cast <bool> (V && "Expression in template argument isn't constant" ) ? void (0) : __assert_fail ("V && \"Expression in template argument isn't constant\"" , "/build/llvm-toolchain-snapshot-7~svn338205/tools/clang/lib/CodeGen/CGDebugInfo.cpp" , 1710, __extension__ __PRETTY_FUNCTION__)); | |||
1711 | llvm::DIType *TTy = getOrCreateType(T, Unit); | |||
1712 | TemplateParams.push_back(DBuilder.createTemplateValueParameter( | |||
1713 | TheCU, Name, TTy, V->stripPointerCasts())); | |||
1714 | } break; | |||
1715 | // And the following should never occur: | |||
1716 | case TemplateArgument::TemplateExpansion: | |||
1717 | case TemplateArgument::Null: | |||
1718 | llvm_unreachable(::llvm::llvm_unreachable_internal("These argument types shouldn't exist in concrete types" , "/build/llvm-toolchain-snapshot-7~svn338205/tools/clang/lib/CodeGen/CGDebugInfo.cpp" , 1719) | |||
1719 | "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-7~svn338205/tools/clang/lib/CodeGen/CGDebugInfo.cpp" , 1719); | |||
1720 | } | |||
1721 | } | |||
1722 | return DBuilder.getOrCreateArray(TemplateParams); | |||
1723 | } | |||
1724 | ||||
1725 | llvm::DINodeArray | |||
1726 | CGDebugInfo::CollectFunctionTemplateParams(const FunctionDecl *FD, | |||
1727 | llvm::DIFile *Unit) { | |||
1728 | if (FD->getTemplatedKind() == | |||
1729 | FunctionDecl::TK_FunctionTemplateSpecialization) { | |||
1730 | const TemplateParameterList *TList = FD->getTemplateSpecializationInfo() | |||
1731 | ->getTemplate() | |||
1732 | ->getTemplateParameters(); | |||
1733 | return CollectTemplateParams( | |||
1734 | TList, FD->getTemplateSpecializationArgs()->asArray(), Unit); | |||
1735 | } | |||
1736 | return llvm::DINodeArray(); | |||
1737 | } | |||
1738 | ||||
1739 | llvm::DINodeArray CGDebugInfo::CollectCXXTemplateParams( | |||
1740 | const ClassTemplateSpecializationDecl *TSpecial, llvm::DIFile *Unit) { | |||
1741 | // Always get the full list of parameters, not just the ones from | |||
1742 | // the specialization. | |||
1743 | TemplateParameterList *TPList = | |||
1744 | TSpecial->getSpecializedTemplate()->getTemplateParameters(); | |||
1745 | const TemplateArgumentList &TAList = TSpecial->getTemplateArgs(); | |||
1746 | return CollectTemplateParams(TPList, TAList.asArray(), Unit); | |||
1747 | } | |||
1748 | ||||
1749 | llvm::DIType *CGDebugInfo::getOrCreateVTablePtrType(llvm::DIFile *Unit) { | |||
1750 | if (VTablePtrType) | |||
1751 | return VTablePtrType; | |||
1752 | ||||
1753 | ASTContext &Context = CGM.getContext(); | |||
1754 | ||||
1755 | /* Function type */ | |||
1756 | llvm::Metadata *STy = getOrCreateType(Context.IntTy, Unit); | |||
1757 | llvm::DITypeRefArray SElements = DBuilder.getOrCreateTypeArray(STy); | |||
1758 | llvm::DIType *SubTy = DBuilder.createSubroutineType(SElements); | |||
1759 | unsigned Size = Context.getTypeSize(Context.VoidPtrTy); | |||
1760 | unsigned VtblPtrAddressSpace = CGM.getTarget().getVtblPtrAddressSpace(); | |||
1761 | Optional<unsigned> DWARFAddressSpace = | |||
1762 | CGM.getTarget().getDWARFAddressSpace(VtblPtrAddressSpace); | |||
1763 | ||||
1764 | llvm::DIType *vtbl_ptr_type = DBuilder.createPointerType( | |||
1765 | SubTy, Size, 0, DWARFAddressSpace, "__vtbl_ptr_type"); | |||
1766 | VTablePtrType = DBuilder.createPointerType(vtbl_ptr_type, Size); | |||
1767 | return VTablePtrType; | |||
1768 | } | |||
1769 | ||||
1770 | StringRef CGDebugInfo::getVTableName(const CXXRecordDecl *RD) { | |||
1771 | // Copy the gdb compatible name on the side and use its reference. | |||
1772 | return internString("_vptr$", RD->getNameAsString()); | |||
1773 | } | |||
1774 | ||||
1775 | void CGDebugInfo::CollectVTableInfo(const CXXRecordDecl *RD, llvm::DIFile *Unit, | |||
1776 | SmallVectorImpl<llvm::Metadata *> &EltTys, | |||
1777 | llvm::DICompositeType *RecordTy) { | |||
1778 | // If this class is not dynamic then there is not any vtable info to collect. | |||
1779 | if (!RD->isDynamicClass()) | |||
1780 | return; | |||
1781 | ||||
1782 | // Don't emit any vtable shape or vptr info if this class doesn't have an | |||
1783 | // extendable vfptr. This can happen if the class doesn't have virtual | |||
1784 | // methods, or in the MS ABI if those virtual methods only come from virtually | |||
1785 | // inherited bases. | |||
1786 | const ASTRecordLayout &RL = CGM.getContext().getASTRecordLayout(RD); | |||
1787 | if (!RL.hasExtendableVFPtr()) | |||
1788 | return; | |||
1789 | ||||
1790 | // CodeView needs to know how large the vtable of every dynamic class is, so | |||
1791 | // emit a special named pointer type into the element list. The vptr type | |||
1792 | // points to this type as well. | |||
1793 | llvm::DIType *VPtrTy = nullptr; | |||
1794 | bool NeedVTableShape = CGM.getCodeGenOpts().EmitCodeView && | |||
1795 | CGM.getTarget().getCXXABI().isMicrosoft(); | |||
1796 | if (NeedVTableShape) { | |||
1797 | uint64_t PtrWidth = | |||
1798 | CGM.getContext().getTypeSize(CGM.getContext().VoidPtrTy); | |||
1799 | const VTableLayout &VFTLayout = | |||
1800 | CGM.getMicrosoftVTableContext().getVFTableLayout(RD, CharUnits::Zero()); | |||
1801 | unsigned VSlotCount = | |||
1802 | VFTLayout.vtable_components().size() - CGM.getLangOpts().RTTIData; | |||
1803 | unsigned VTableWidth = PtrWidth * VSlotCount; | |||
1804 | unsigned VtblPtrAddressSpace = CGM.getTarget().getVtblPtrAddressSpace(); | |||
1805 | Optional<unsigned> DWARFAddressSpace = | |||
1806 | CGM.getTarget().getDWARFAddressSpace(VtblPtrAddressSpace); | |||
1807 | ||||
1808 | // Create a very wide void* type and insert it directly in the element list. | |||
1809 | llvm::DIType *VTableType = DBuilder.createPointerType( | |||
1810 | nullptr, VTableWidth, 0, DWARFAddressSpace, "__vtbl_ptr_type"); | |||
1811 | EltTys.push_back(VTableType); | |||
1812 | ||||
1813 | // The vptr is a pointer to this special vtable type. | |||
1814 | VPtrTy = DBuilder.createPointerType(VTableType, PtrWidth); | |||
1815 | } | |||
1816 | ||||
1817 | // If there is a primary base then the artificial vptr member lives there. | |||
1818 | if (RL.getPrimaryBase()) | |||
1819 | return; | |||
1820 | ||||
1821 | if (!VPtrTy) | |||
1822 | VPtrTy = getOrCreateVTablePtrType(Unit); | |||
1823 | ||||
1824 | unsigned Size = CGM.getContext().getTypeSize(CGM.getContext().VoidPtrTy); | |||
1825 | llvm::DIType *VPtrMember = | |||
1826 | DBuilder.createMemberType(Unit, getVTableName(RD), Unit, 0, Size, 0, 0, | |||
1827 | llvm::DINode::FlagArtificial, VPtrTy); | |||
1828 | EltTys.push_back(VPtrMember); | |||
1829 | } | |||
1830 | ||||
1831 | llvm::DIType *CGDebugInfo::getOrCreateRecordType(QualType RTy, | |||
1832 | SourceLocation Loc) { | |||
1833 | assert(DebugKind >= codegenoptions::LimitedDebugInfo)(static_cast <bool> (DebugKind >= codegenoptions::LimitedDebugInfo ) ? void (0) : __assert_fail ("DebugKind >= codegenoptions::LimitedDebugInfo" , "/build/llvm-toolchain-snapshot-7~svn338205/tools/clang/lib/CodeGen/CGDebugInfo.cpp" , 1833, __extension__ __PRETTY_FUNCTION__)); | |||
1834 | llvm::DIType *T = getOrCreateType(RTy, getOrCreateFile(Loc)); | |||
1835 | return T; | |||
1836 | } | |||
1837 | ||||
1838 | llvm::DIType *CGDebugInfo::getOrCreateInterfaceType(QualType D, | |||
1839 | SourceLocation Loc) { | |||
1840 | return getOrCreateStandaloneType(D, Loc); | |||
1841 | } | |||
1842 | ||||
1843 | llvm::DIType *CGDebugInfo::getOrCreateStandaloneType(QualType D, | |||
1844 | SourceLocation Loc) { | |||
1845 | assert(DebugKind >= codegenoptions::LimitedDebugInfo)(static_cast <bool> (DebugKind >= codegenoptions::LimitedDebugInfo ) ? void (0) : __assert_fail ("DebugKind >= codegenoptions::LimitedDebugInfo" , "/build/llvm-toolchain-snapshot-7~svn338205/tools/clang/lib/CodeGen/CGDebugInfo.cpp" , 1845, __extension__ __PRETTY_FUNCTION__)); | |||
1846 | assert(!D.isNull() && "null type")(static_cast <bool> (!D.isNull() && "null type" ) ? void (0) : __assert_fail ("!D.isNull() && \"null type\"" , "/build/llvm-toolchain-snapshot-7~svn338205/tools/clang/lib/CodeGen/CGDebugInfo.cpp" , 1846, __extension__ __PRETTY_FUNCTION__)); | |||
1847 | llvm::DIType *T = getOrCreateType(D, getOrCreateFile(Loc)); | |||
1848 | assert(T && "could not create debug info for type")(static_cast <bool> (T && "could not create debug info for type" ) ? void (0) : __assert_fail ("T && \"could not create debug info for type\"" , "/build/llvm-toolchain-snapshot-7~svn338205/tools/clang/lib/CodeGen/CGDebugInfo.cpp" , 1848, __extension__ __PRETTY_FUNCTION__)); | |||
1849 | ||||
1850 | RetainedTypes.push_back(D.getAsOpaquePtr()); | |||
1851 | return T; | |||
1852 | } | |||
1853 | ||||
1854 | void CGDebugInfo::completeType(const EnumDecl *ED) { | |||
1855 | if (DebugKind <= codegenoptions::DebugLineTablesOnly) | |||
1856 | return; | |||
1857 | QualType Ty = CGM.getContext().getEnumType(ED); | |||
1858 | void *TyPtr = Ty.getAsOpaquePtr(); | |||
1859 | auto I = TypeCache.find(TyPtr); | |||
1860 | if (I == TypeCache.end() || !cast<llvm::DIType>(I->second)->isForwardDecl()) | |||
1861 | return; | |||
1862 | llvm::DIType *Res = CreateTypeDefinition(Ty->castAs<EnumType>()); | |||
1863 | assert(!Res->isForwardDecl())(static_cast <bool> (!Res->isForwardDecl()) ? void ( 0) : __assert_fail ("!Res->isForwardDecl()", "/build/llvm-toolchain-snapshot-7~svn338205/tools/clang/lib/CodeGen/CGDebugInfo.cpp" , 1863, __extension__ __PRETTY_FUNCTION__)); | |||
1864 | TypeCache[TyPtr].reset(Res); | |||
1865 | } | |||
1866 | ||||
1867 | void CGDebugInfo::completeType(const RecordDecl *RD) { | |||
1868 | if (DebugKind > codegenoptions::LimitedDebugInfo || | |||
1869 | !CGM.getLangOpts().CPlusPlus) | |||
1870 | completeRequiredType(RD); | |||
1871 | } | |||
1872 | ||||
1873 | /// Return true if the class or any of its methods are marked dllimport. | |||
1874 | static bool isClassOrMethodDLLImport(const CXXRecordDecl *RD) { | |||
1875 | if (RD->hasAttr<DLLImportAttr>()) | |||
1876 | return true; | |||
1877 | for (const CXXMethodDecl *MD : RD->methods()) | |||
1878 | if (MD->hasAttr<DLLImportAttr>()) | |||
1879 | return true; | |||
1880 | return false; | |||
1881 | } | |||
1882 | ||||
1883 | /// Does a type definition exist in an imported clang module? | |||
1884 | static bool isDefinedInClangModule(const RecordDecl *RD) { | |||
1885 | // Only definitions that where imported from an AST file come from a module. | |||
1886 | if (!RD || !RD->isFromASTFile()) | |||
1887 | return false; | |||
1888 | // Anonymous entities cannot be addressed. Treat them as not from module. | |||
1889 | if (!RD->isExternallyVisible() && RD->getName().empty()) | |||
1890 | return false; | |||
1891 | if (auto *CXXDecl = dyn_cast<CXXRecordDecl>(RD)) { | |||
1892 | if (!CXXDecl->isCompleteDefinition()) | |||
1893 | return false; | |||
1894 | auto TemplateKind = CXXDecl->getTemplateSpecializationKind(); | |||
1895 | if (TemplateKind != TSK_Undeclared) { | |||
1896 | // This is a template, check the origin of the first member. | |||
1897 | if (CXXDecl->field_begin() == CXXDecl->field_end()) | |||
1898 | return TemplateKind == TSK_ExplicitInstantiationDeclaration; | |||
1899 | if (!CXXDecl->field_begin()->isFromASTFile()) | |||
1900 | return false; | |||
1901 | } | |||
1902 | } | |||
1903 | return true; | |||
1904 | } | |||
1905 | ||||
1906 | void CGDebugInfo::completeClassData(const RecordDecl *RD) { | |||
1907 | if (auto *CXXRD = dyn_cast<CXXRecordDecl>(RD)) | |||
1908 | if (CXXRD->isDynamicClass() && | |||
1909 | CGM.getVTableLinkage(CXXRD) == | |||
1910 | llvm::GlobalValue::AvailableExternallyLinkage && | |||
1911 | !isClassOrMethodDLLImport(CXXRD)) | |||
1912 | return; | |||
1913 | ||||
1914 | if (DebugTypeExtRefs && isDefinedInClangModule(RD->getDefinition())) | |||
1915 | return; | |||
1916 | ||||
1917 | completeClass(RD); | |||
1918 | } | |||
1919 | ||||
1920 | void CGDebugInfo::completeClass(const RecordDecl *RD) { | |||
1921 | if (DebugKind <= codegenoptions::DebugLineTablesOnly) | |||
1922 | return; | |||
1923 | QualType Ty = CGM.getContext().getRecordType(RD); | |||
1924 | void *TyPtr = Ty.getAsOpaquePtr(); | |||
1925 | auto I = TypeCache.find(TyPtr); | |||
1926 | if (I != TypeCache.end() && !cast<llvm::DIType>(I->second)->isForwardDecl()) | |||
1927 | return; | |||
1928 | llvm::DIType *Res = CreateTypeDefinition(Ty->castAs<RecordType>()); | |||
1929 | assert(!Res->isForwardDecl())(static_cast <bool> (!Res->isForwardDecl()) ? void ( 0) : __assert_fail ("!Res->isForwardDecl()", "/build/llvm-toolchain-snapshot-7~svn338205/tools/clang/lib/CodeGen/CGDebugInfo.cpp" , 1929, __extension__ __PRETTY_FUNCTION__)); | |||
1930 | TypeCache[TyPtr].reset(Res); | |||
1931 | } | |||
1932 | ||||
1933 | static bool hasExplicitMemberDefinition(CXXRecordDecl::method_iterator I, | |||
1934 | CXXRecordDecl::method_iterator End) { | |||
1935 | for (CXXMethodDecl *MD : llvm::make_range(I, End)) | |||
1936 | if (FunctionDecl *Tmpl = MD->getInstantiatedFromMemberFunction()) | |||
1937 | if (!Tmpl->isImplicit() && Tmpl->isThisDeclarationADefinition() && | |||
1938 | !MD->getMemberSpecializationInfo()->isExplicitSpecialization()) | |||
1939 | return true; | |||
1940 | return false; | |||
1941 | } | |||
1942 | ||||
1943 | static bool shouldOmitDefinition(codegenoptions::DebugInfoKind DebugKind, | |||
1944 | bool DebugTypeExtRefs, const RecordDecl *RD, | |||
1945 | const LangOptions &LangOpts) { | |||
1946 | if (DebugTypeExtRefs && isDefinedInClangModule(RD->getDefinition())) | |||
1947 | return true; | |||
1948 | ||||
1949 | if (auto *ES = RD->getASTContext().getExternalSource()) | |||
1950 | if (ES->hasExternalDefinitions(RD) == ExternalASTSource::EK_Always) | |||
1951 | return true; | |||
1952 | ||||
1953 | if (DebugKind > codegenoptions::LimitedDebugInfo) | |||
1954 | return false; | |||
1955 | ||||
1956 | if (!LangOpts.CPlusPlus) | |||
1957 | return false; | |||
1958 | ||||
1959 | if (!RD->isCompleteDefinitionRequired()) | |||
1960 | return true; | |||
1961 | ||||
1962 | const auto *CXXDecl = dyn_cast<CXXRecordDecl>(RD); | |||
1963 | ||||
1964 | if (!CXXDecl) | |||
1965 | return false; | |||
1966 | ||||
1967 | // Only emit complete debug info for a dynamic class when its vtable is | |||
1968 | // emitted. However, Microsoft debuggers don't resolve type information | |||
1969 | // across DLL boundaries, so skip this optimization if the class or any of its | |||
1970 | // methods are marked dllimport. This isn't a complete solution, since objects | |||
1971 | // without any dllimport methods can be used in one DLL and constructed in | |||
1972 | // another, but it is the current behavior of LimitedDebugInfo. | |||
1973 | if (CXXDecl->hasDefinition() && CXXDecl->isDynamicClass() && | |||
1974 | !isClassOrMethodDLLImport(CXXDecl)) | |||
1975 | return true; | |||
1976 | ||||
1977 | TemplateSpecializationKind Spec = TSK_Undeclared; | |||
1978 | if (const auto *SD = dyn_cast<ClassTemplateSpecializationDecl>(RD)) | |||
1979 | Spec = SD->getSpecializationKind(); | |||
1980 | ||||
1981 | if (Spec == TSK_ExplicitInstantiationDeclaration && | |||
1982 | hasExplicitMemberDefinition(CXXDecl->method_begin(), | |||
1983 | CXXDecl->method_end())) | |||
1984 | return true; | |||
1985 | ||||
1986 | return false; | |||
1987 | } | |||
1988 | ||||
1989 | void CGDebugInfo::completeRequiredType(const RecordDecl *RD) { | |||
1990 | if (shouldOmitDefinition(DebugKind, DebugTypeExtRefs, RD, CGM.getLangOpts())) | |||
1991 | return; | |||
1992 | ||||
1993 | QualType Ty = CGM.getContext().getRecordType(RD); | |||
1994 | llvm::DIType *T = getTypeOrNull(Ty); | |||
1995 | if (T && T->isForwardDecl()) | |||
1996 | completeClassData(RD); | |||
1997 | } | |||
1998 | ||||
1999 | llvm::DIType *CGDebugInfo::CreateType(const RecordType *Ty) { | |||
2000 | RecordDecl *RD = Ty->getDecl(); | |||
2001 | llvm::DIType *T = cast_or_null<llvm::DIType>(getTypeOrNull(QualType(Ty, 0))); | |||
2002 | if (T || shouldOmitDefinition(DebugKind, DebugTypeExtRefs, RD, | |||
2003 | CGM.getLangOpts())) { | |||
2004 | if (!T) | |||
2005 | T = getOrCreateRecordFwdDecl(Ty, getDeclContextDescriptor(RD)); | |||
2006 | return T; | |||
2007 | } | |||
2008 | ||||
2009 | return CreateTypeDefinition(Ty); | |||
2010 | } | |||
2011 | ||||
2012 | llvm::DIType *CGDebugInfo::CreateTypeDefinition(const RecordType *Ty) { | |||
2013 | RecordDecl *RD = Ty->getDecl(); | |||
2014 | ||||
2015 | // Get overall information about the record type for the debug info. | |||
2016 | llvm::DIFile *DefUnit = getOrCreateFile(RD->getLocation()); | |||
2017 | ||||
2018 | // Records and classes and unions can all be recursive. To handle them, we | |||
2019 | // first generate a debug descriptor for the struct as a forward declaration. | |||
2020 | // Then (if it is a definition) we go through and get debug info for all of | |||
2021 | // its members. Finally, we create a descriptor for the complete type (which | |||
2022 | // may refer to the forward decl if the struct is recursive) and replace all | |||
2023 | // uses of the forward declaration with the final definition. | |||
2024 | llvm::DICompositeType *FwdDecl = getOrCreateLimitedType(Ty, DefUnit); | |||
2025 | ||||
2026 | const RecordDecl *D = RD->getDefinition(); | |||
2027 | if (!D || !D->isCompleteDefinition()) | |||
2028 | return FwdDecl; | |||
2029 | ||||
2030 | if (const auto *CXXDecl = dyn_cast<CXXRecordDecl>(RD)) | |||
2031 | CollectContainingType(CXXDecl, FwdDecl); | |||
2032 | ||||
2033 | // Push the struct on region stack. | |||
2034 | LexicalBlockStack.emplace_back(&*FwdDecl); | |||
2035 | RegionMap[Ty->getDecl()].reset(FwdDecl); | |||
2036 | ||||
2037 | // Convert all the elements. | |||
2038 | SmallVector<llvm::Metadata *, 16> EltTys; | |||
2039 | // what about nested types? | |||
2040 | ||||
2041 | // Note: The split of CXXDecl information here is intentional, the | |||
2042 | // gdb tests will depend on a certain ordering at printout. The debug | |||
2043 | // information offsets are still correct if we merge them all together | |||
2044 | // though. | |||
2045 | const auto *CXXDecl = dyn_cast<CXXRecordDecl>(RD); | |||
2046 | if (CXXDecl) { | |||
2047 | CollectCXXBases(CXXDecl, DefUnit, EltTys, FwdDecl); | |||
2048 | CollectVTableInfo(CXXDecl, DefUnit, EltTys, FwdDecl); | |||
2049 | } | |||
2050 | ||||
2051 | // Collect data fields (including static variables and any initializers). | |||
2052 | CollectRecordFields(RD, DefUnit, EltTys, FwdDecl); | |||
2053 | if (CXXDecl) | |||
2054 | CollectCXXMemberFunctions(CXXDecl, DefUnit, EltTys, FwdDecl); | |||
2055 | ||||
2056 | LexicalBlockStack.pop_back(); | |||
2057 | RegionMap.erase(Ty->getDecl()); | |||
2058 | ||||
2059 | llvm::DINodeArray Elements = DBuilder.getOrCreateArray(EltTys); | |||
2060 | DBuilder.replaceArrays(FwdDecl, Elements); | |||
2061 | ||||
2062 | if (FwdDecl->isTemporary()) | |||
2063 | FwdDecl = | |||
2064 | llvm::MDNode::replaceWithPermanent(llvm::TempDICompositeType(FwdDecl)); | |||
2065 | ||||
2066 | RegionMap[Ty->getDecl()].reset(FwdDecl); | |||
2067 | return FwdDecl; | |||
2068 | } | |||
2069 | ||||
2070 | llvm::DIType *CGDebugInfo::CreateType(const ObjCObjectType *Ty, | |||
2071 | llvm::DIFile *Unit) { | |||
2072 | // Ignore protocols. | |||
2073 | return getOrCreateType(Ty->getBaseType(), Unit); | |||
2074 | } | |||
2075 | ||||
2076 | llvm::DIType *CGDebugInfo::CreateType(const ObjCTypeParamType *Ty, | |||
2077 | llvm::DIFile *Unit) { | |||
2078 | // Ignore protocols. | |||
2079 | SourceLocation Loc = Ty->getDecl()->getLocation(); | |||
2080 | ||||
2081 | // Use Typedefs to represent ObjCTypeParamType. | |||
2082 | return DBuilder.createTypedef( | |||
2083 | getOrCreateType(Ty->getDecl()->getUnderlyingType(), Unit), | |||
2084 | Ty->getDecl()->getName(), getOrCreateFile(Loc), getLineNumber(Loc), | |||
2085 | getDeclContextDescriptor(Ty->getDecl())); | |||
2086 | } | |||
2087 | ||||
2088 | /// \return true if Getter has the default name for the property PD. | |||
2089 | static bool hasDefaultGetterName(const ObjCPropertyDecl *PD, | |||
2090 | const ObjCMethodDecl *Getter) { | |||
2091 | assert(PD)(static_cast <bool> (PD) ? void (0) : __assert_fail ("PD" , "/build/llvm-toolchain-snapshot-7~svn338205/tools/clang/lib/CodeGen/CGDebugInfo.cpp" , 2091, __extension__ __PRETTY_FUNCTION__)); | |||
2092 | if (!Getter) | |||
2093 | return true; | |||
2094 | ||||
2095 | assert(Getter->getDeclName().isObjCZeroArgSelector())(static_cast <bool> (Getter->getDeclName().isObjCZeroArgSelector ()) ? void (0) : __assert_fail ("Getter->getDeclName().isObjCZeroArgSelector()" , "/build/llvm-toolchain-snapshot-7~svn338205/tools/clang/lib/CodeGen/CGDebugInfo.cpp" , 2095, __extension__ __PRETTY_FUNCTION__)); | |||
2096 | return PD->getName() == | |||
2097 | Getter->getDeclName().getObjCSelector().getNameForSlot(0); | |||
2098 | } | |||
2099 | ||||
2100 | /// \return true if Setter has the default name for the property PD. | |||
2101 | static bool hasDefaultSetterName(const ObjCPropertyDecl *PD, | |||
2102 | const ObjCMethodDecl *Setter) { | |||
2103 | assert(PD)(static_cast <bool> (PD) ? void (0) : __assert_fail ("PD" , "/build/llvm-toolchain-snapshot-7~svn338205/tools/clang/lib/CodeGen/CGDebugInfo.cpp" , 2103, __extension__ __PRETTY_FUNCTION__)); | |||
2104 | if (!Setter) | |||
2105 | return true; | |||
2106 | ||||
2107 | assert(Setter->getDeclName().isObjCOneArgSelector())(static_cast <bool> (Setter->getDeclName().isObjCOneArgSelector ()) ? void (0) : __assert_fail ("Setter->getDeclName().isObjCOneArgSelector()" , "/build/llvm-toolchain-snapshot-7~svn338205/tools/clang/lib/CodeGen/CGDebugInfo.cpp" , 2107, __extension__ __PRETTY_FUNCTION__)); | |||
2108 | return SelectorTable::constructSetterName(PD->getName()) == | |||
2109 | Setter->getDeclName().getObjCSelector().getNameForSlot(0); | |||
2110 | } | |||
2111 | ||||
2112 | llvm::DIType *CGDebugInfo::CreateType(const ObjCInterfaceType *Ty, | |||
2113 | llvm::DIFile *Unit) { | |||
2114 | ObjCInterfaceDecl *ID = Ty->getDecl(); | |||
2115 | if (!ID) | |||
2116 | return nullptr; | |||
2117 | ||||
2118 | // Return a forward declaration if this type was imported from a clang module, | |||
2119 | // and this is not the compile unit with the implementation of the type (which | |||
2120 | // may contain hidden ivars). | |||
2121 | if (DebugTypeExtRefs && ID->isFromASTFile() && ID->getDefinition() && | |||
2122 | !ID->getImplementation()) | |||
2123 | return DBuilder.createForwardDecl(llvm::dwarf::DW_TAG_structure_type, | |||
2124 | ID->getName(), | |||
2125 | getDeclContextDescriptor(ID), Unit, 0); | |||
2126 | ||||
2127 | // Get overall information about the record type for the debug info. | |||
2128 | llvm::DIFile *DefUnit = getOrCreateFile(ID->getLocation()); | |||
2129 | unsigned Line = getLineNumber(ID->getLocation()); | |||
2130 | auto RuntimeLang = | |||
2131 | static_cast<llvm::dwarf::SourceLanguage>(TheCU->getSourceLanguage()); | |||
2132 | ||||
2133 | // If this is just a forward declaration return a special forward-declaration | |||
2134 | // debug type since we won't be able to lay out the entire type. | |||
2135 | ObjCInterfaceDecl *Def = ID->getDefinition(); | |||
2136 | if (!Def || !Def->getImplementation()) { | |||
2137 | llvm::DIScope *Mod = getParentModuleOrNull(ID); | |||
2138 | llvm::DIType *FwdDecl = DBuilder.createReplaceableCompositeType( | |||
2139 | llvm::dwarf::DW_TAG_structure_type, ID->getName(), Mod ? Mod : TheCU, | |||
2140 | DefUnit, Line, RuntimeLang); | |||
2141 | ObjCInterfaceCache.push_back(ObjCInterfaceCacheEntry(Ty, FwdDecl, Unit)); | |||
2142 | return FwdDecl; | |||
2143 | } | |||
2144 | ||||
2145 | return CreateTypeDefinition(Ty, Unit); | |||
2146 | } | |||
2147 | ||||
2148 | llvm::DIModule * | |||
2149 | CGDebugInfo::getOrCreateModuleRef(ExternalASTSource::ASTSourceDescriptor Mod, | |||
2150 | bool CreateSkeletonCU) { | |||
2151 | // Use the Module pointer as the key into the cache. This is a | |||
2152 | // nullptr if the "Module" is a PCH, which is safe because we don't | |||
2153 | // support chained PCH debug info, so there can only be a single PCH. | |||
2154 | const Module *M = Mod.getModuleOrNull(); | |||
2155 | auto ModRef = ModuleCache.find(M); | |||
2156 | if (ModRef != ModuleCache.end()) | |||
2157 | return cast<llvm::DIModule>(ModRef->second); | |||
2158 | ||||
2159 | // Macro definitions that were defined with "-D" on the command line. | |||
2160 | SmallString<128> ConfigMacros; | |||
2161 | { | |||
2162 | llvm::raw_svector_ostream OS(ConfigMacros); | |||
2163 | const auto &PPOpts = CGM.getPreprocessorOpts(); | |||
2164 | unsigned I = 0; | |||
2165 | // Translate the macro definitions back into a command line. | |||
2166 | for (auto &M : PPOpts.Macros) { | |||
2167 | if (++I > 1) | |||
2168 | OS << " "; | |||
2169 | const std::string &Macro = M.first; | |||
2170 | bool Undef = M.second; | |||
2171 | OS << "\"-" << (Undef ? 'U' : 'D'); | |||
2172 | for (char c : Macro) | |||
2173 | switch (c) { | |||
2174 | case '\\': | |||
2175 | OS << "\\\\"; | |||
2176 | break; | |||
2177 | case '"': | |||
2178 | OS << "\\\""; | |||
2179 | break; | |||
2180 | default: | |||
2181 | OS << c; | |||
2182 | } | |||
2183 | OS << '\"'; | |||
2184 | } | |||
2185 | } | |||
2186 | ||||
2187 | bool IsRootModule = M ? !M->Parent : true; | |||
2188 | if (CreateSkeletonCU && IsRootModule) { | |||
2189 | // PCH files don't have a signature field in the control block, | |||
2190 | // but LLVM detects skeleton CUs by looking for a non-zero DWO id. | |||
2191 | // We use the lower 64 bits for debug info. | |||
2192 | uint64_t Signature = | |||
2193 | Mod.getSignature() | |||
2194 | ? (uint64_t)Mod.getSignature()[1] << 32 | Mod.getSignature()[0] | |||
2195 | : ~1ULL; | |||
2196 | llvm::DIBuilder DIB(CGM.getModule()); | |||
2197 | DIB.createCompileUnit(TheCU->getSourceLanguage(), | |||
2198 | // TODO: Support "Source" from external AST providers? | |||
2199 | DIB.createFile(Mod.getModuleName(), Mod.getPath()), | |||
2200 | TheCU->getProducer(), true, StringRef(), 0, | |||
2201 | Mod.getASTFile(), llvm::DICompileUnit::FullDebug, | |||
2202 | Signature); | |||
2203 | DIB.finalize(); | |||
2204 | } | |||
2205 | llvm::DIModule *Parent = | |||
2206 | IsRootModule ? nullptr | |||
2207 | : getOrCreateModuleRef( | |||
2208 | ExternalASTSource::ASTSourceDescriptor(*M->Parent), | |||
2209 | CreateSkeletonCU); | |||
2210 | llvm::DIModule *DIMod = | |||
2211 | DBuilder.createModule(Parent, Mod.getModuleName(), ConfigMacros, | |||
2212 | Mod.getPath(), CGM.getHeaderSearchOpts().Sysroot); | |||
2213 | ModuleCache[M].reset(DIMod); | |||
2214 | return DIMod; | |||
2215 | } | |||
2216 | ||||
2217 | llvm::DIType *CGDebugInfo::CreateTypeDefinition(const ObjCInterfaceType *Ty, | |||
2218 | llvm::DIFile *Unit) { | |||
2219 | ObjCInterfaceDecl *ID = Ty->getDecl(); | |||
2220 | llvm::DIFile *DefUnit = getOrCreateFile(ID->getLocation()); | |||
2221 | unsigned Line = getLineNumber(ID->getLocation()); | |||
2222 | unsigned RuntimeLang = TheCU->getSourceLanguage(); | |||
2223 | ||||
2224 | // Bit size, align and offset of the type. | |||
2225 | uint64_t Size = CGM.getContext().getTypeSize(Ty); | |||
2226 | auto Align = getTypeAlignIfRequired(Ty, CGM.getContext()); | |||
2227 | ||||
2228 | llvm::DINode::DIFlags Flags = llvm::DINode::FlagZero; | |||
2229 | if (ID->getImplementation()) | |||
2230 | Flags |= llvm::DINode::FlagObjcClassComplete; | |||
2231 | ||||
2232 | llvm::DIScope *Mod = getParentModuleOrNull(ID); | |||
2233 | llvm::DICompositeType *RealDecl = DBuilder.createStructType( | |||
2234 | Mod ? Mod : Unit, ID->getName(), DefUnit, Line, Size, Align, Flags, | |||
2235 | nullptr, llvm::DINodeArray(), RuntimeLang); | |||
2236 | ||||
2237 | QualType QTy(Ty, 0); | |||
2238 | TypeCache[QTy.getAsOpaquePtr()].reset(RealDecl); | |||
2239 | ||||
2240 | // Push the struct on region stack. | |||
2241 | LexicalBlockStack.emplace_back(RealDecl); | |||
2242 | RegionMap[Ty->getDecl()].reset(RealDecl); | |||
2243 | ||||
2244 | // Convert all the elements. | |||
2245 | SmallVector<llvm::Metadata *, 16> EltTys; | |||
2246 | ||||
2247 | ObjCInterfaceDecl *SClass = ID->getSuperClass(); | |||
2248 | if (SClass) { | |||
2249 | llvm::DIType *SClassTy = | |||
2250 | getOrCreateType(CGM.getContext().getObjCInterfaceType(SClass), Unit); | |||
2251 | if (!SClassTy) | |||
2252 | return nullptr; | |||
2253 | ||||
2254 | llvm::DIType *InhTag = DBuilder.createInheritance(RealDecl, SClassTy, 0, 0, | |||
2255 | llvm::DINode::FlagZero); | |||
2256 | EltTys.push_back(InhTag); | |||
2257 | } | |||
2258 | ||||
2259 | // Create entries for all of the properties. | |||
2260 | auto AddProperty = [&](const ObjCPropertyDecl *PD) { | |||
2261 | SourceLocation Loc = PD->getLocation(); | |||
2262 | llvm::DIFile *PUnit = getOrCreateFile(Loc); | |||
2263 | unsigned PLine = getLineNumber(Loc); | |||
2264 | ObjCMethodDecl *Getter = PD->getGetterMethodDecl(); | |||
2265 | ObjCMethodDecl *Setter = PD->getSetterMethodDecl(); | |||
2266 | llvm::MDNode *PropertyNode = DBuilder.createObjCProperty( | |||
2267 | PD->getName(), PUnit, PLine, | |||
2268 | hasDefaultGetterName(PD, Getter) ? "" | |||
2269 | : getSelectorName(PD->getGetterName()), | |||
2270 | hasDefaultSetterName(PD, Setter) ? "" | |||
2271 | : getSelectorName(PD->getSetterName()), | |||
2272 | PD->getPropertyAttributes(), getOrCreateType(PD->getType(), PUnit)); | |||
2273 | EltTys.push_back(PropertyNode); | |||
2274 | }; | |||
2275 | { | |||
2276 | llvm::SmallPtrSet<const IdentifierInfo *, 16> PropertySet; | |||
2277 | for (const ObjCCategoryDecl *ClassExt : ID->known_extensions()) | |||
2278 | for (auto *PD : ClassExt->properties()) { | |||
2279 | PropertySet.insert(PD->getIdentifier()); | |||
2280 | AddProperty(PD); | |||
2281 | } | |||
2282 | for (const auto *PD : ID->properties()) { | |||
2283 | // Don't emit duplicate metadata for properties that were already in a | |||
2284 | // class extension. | |||
2285 | if (!PropertySet.insert(PD->getIdentifier()).second) | |||
2286 | continue; | |||
2287 | AddProperty(PD); | |||
2288 | } | |||
2289 | } | |||
2290 | ||||
2291 | const ASTRecordLayout &RL = CGM.getContext().getASTObjCInterfaceLayout(ID); | |||
2292 | unsigned FieldNo = 0; | |||
2293 | for (ObjCIvarDecl *Field = ID->all_declared_ivar_begin(); Field; | |||
2294 | Field = Field->getNextIvar(), ++FieldNo) { | |||
2295 | llvm::DIType *FieldTy = getOrCreateType(Field->getType(), Unit); | |||
2296 | if (!FieldTy) | |||
2297 | return nullptr; | |||
2298 | ||||
2299 | StringRef FieldName = Field->getName(); | |||
2300 | ||||
2301 | // Ignore unnamed fields. | |||
2302 | if (FieldName.empty()) | |||
2303 | continue; | |||
2304 | ||||
2305 | // Get the location for the field. | |||
2306 | llvm::DIFile *FieldDefUnit = getOrCreateFile(Field->getLocation()); | |||
2307 | unsigned FieldLine = getLineNumber(Field->getLocation()); | |||
2308 | QualType FType = Field->getType(); | |||
2309 | uint64_t FieldSize = 0; | |||
2310 | uint32_t FieldAlign = 0; | |||
2311 | ||||
2312 | if (!FType->isIncompleteArrayType()) { | |||
2313 | ||||
2314 | // Bit size, align and offset of the type. | |||
2315 | FieldSize = Field->isBitField() | |||
2316 | ? Field->getBitWidthValue(CGM.getContext()) | |||
2317 | : CGM.getContext().getTypeSize(FType); | |||
2318 | FieldAlign = getTypeAlignIfRequired(FType, CGM.getContext()); | |||
2319 | } | |||
2320 | ||||
2321 | uint64_t FieldOffset; | |||
2322 | if (CGM.getLangOpts().ObjCRuntime.isNonFragile()) { | |||
2323 | // We don't know the runtime offset of an ivar if we're using the | |||
2324 | // non-fragile ABI. For bitfields, use the bit offset into the first | |||
2325 | // byte of storage of the bitfield. For other fields, use zero. | |||
2326 | if (Field->isBitField()) { | |||
2327 | FieldOffset = | |||
2328 | CGM.getObjCRuntime().ComputeBitfieldBitOffset(CGM, ID, Field); | |||
2329 | FieldOffset %= CGM.getContext().getCharWidth(); | |||
2330 | } else { | |||
2331 | FieldOffset = 0; | |||
2332 | } | |||
2333 | } else { | |||
2334 | FieldOffset = RL.getFieldOffset(FieldNo); | |||
2335 | } | |||
2336 | ||||
2337 | llvm::DINode::DIFlags Flags = llvm::DINode::FlagZero; | |||
2338 | if (Field->getAccessControl() == ObjCIvarDecl::Protected) | |||
2339 | Flags = llvm::DINode::FlagProtected; | |||
2340 | else if (Field->getAccessControl() == ObjCIvarDecl::Private) | |||
2341 | Flags = llvm::DINode::FlagPrivate; | |||
2342 | else if (Field->getAccessControl() == ObjCIvarDecl::Public) | |||
2343 | Flags = llvm::DINode::FlagPublic; | |||
2344 | ||||
2345 | llvm::MDNode *PropertyNode = nullptr; | |||
2346 | if (ObjCImplementationDecl *ImpD = ID->getImplementation()) { | |||
2347 | if (ObjCPropertyImplDecl *PImpD = | |||
2348 | ImpD->FindPropertyImplIvarDecl(Field->getIdentifier())) { | |||
2349 | if (ObjCPropertyDecl *PD = PImpD->getPropertyDecl()) { | |||
2350 | SourceLocation Loc = PD->getLocation(); | |||
2351 | llvm::DIFile *PUnit = getOrCreateFile(Loc); | |||
2352 | unsigned PLine = getLineNumber(Loc); | |||
2353 | ObjCMethodDecl *Getter = PD->getGetterMethodDecl(); | |||
2354 | ObjCMethodDecl *Setter = PD->getSetterMethodDecl(); | |||
2355 | PropertyNode = DBuilder.createObjCProperty( | |||
2356 | PD->getName(), PUnit, PLine, | |||
2357 | hasDefaultGetterName(PD, Getter) | |||
2358 | ? "" | |||
2359 | : getSelectorName(PD->getGetterName()), | |||
2360 | hasDefaultSetterName(PD, Setter) | |||
2361 | ? "" | |||
2362 | : getSelectorName(PD->getSetterName()), | |||
2363 | PD->getPropertyAttributes(), | |||
2364 | getOrCreateType(PD->getType(), PUnit)); | |||
2365 | } | |||
2366 | } | |||
2367 | } | |||
2368 | FieldTy = DBuilder.createObjCIVar(FieldName, FieldDefUnit, FieldLine, | |||
2369 | FieldSize, FieldAlign, FieldOffset, Flags, | |||
2370 | FieldTy, PropertyNode); | |||
2371 | EltTys.push_back(FieldTy); | |||
2372 | } | |||
2373 | ||||
2374 | llvm::DINodeArray Elements = DBuilder.getOrCreateArray(EltTys); | |||
2375 | DBuilder.replaceArrays(RealDecl, Elements); | |||
2376 | ||||
2377 | LexicalBlockStack.pop_back(); | |||
2378 | return RealDecl; | |||
2379 | } | |||
2380 | ||||
2381 | llvm::DIType *CGDebugInfo::CreateType(const VectorType *Ty, | |||
2382 | llvm::DIFile *Unit) { | |||
2383 | llvm::DIType *ElementTy = getOrCreateType(Ty->getElementType(), Unit); | |||
2384 | int64_t Count = Ty->getNumElements(); | |||
2385 | ||||
2386 | llvm::Metadata *Subscript; | |||
2387 | QualType QTy(Ty, 0); | |||
2388 | auto SizeExpr = SizeExprCache.find(QTy); | |||
2389 | if (SizeExpr != SizeExprCache.end()) | |||
2390 | Subscript = DBuilder.getOrCreateSubrange(0, SizeExpr->getSecond()); | |||
2391 | else | |||
2392 | Subscript = DBuilder.getOrCreateSubrange(0, Count ? Count : -1); | |||
2393 | llvm::DINodeArray SubscriptArray = DBuilder.getOrCreateArray(Subscript); | |||
2394 | ||||
2395 | uint64_t Size = CGM.getContext().getTypeSize(Ty); | |||
2396 | auto Align = getTypeAlignIfRequired(Ty, CGM.getContext()); | |||
2397 | ||||
2398 | return DBuilder.createVectorType(Size, Align, ElementTy, SubscriptArray); | |||
2399 | } | |||
2400 | ||||
2401 | llvm::DIType *CGDebugInfo::CreateType(const ArrayType *Ty, llvm::DIFile *Unit) { | |||
2402 | uint64_t Size; | |||
2403 | uint32_t Align; | |||
2404 | ||||
2405 | // FIXME: make getTypeAlign() aware of VLAs and incomplete array types | |||
2406 | if (const auto *VAT = dyn_cast<VariableArrayType>(Ty)) { | |||
2407 | Size = 0; | |||
2408 | Align = getTypeAlignIfRequired(CGM.getContext().getBaseElementType(VAT), | |||
2409 | CGM.getContext()); | |||
2410 | } else if (Ty->isIncompleteArrayType()) { | |||
2411 | Size = 0; | |||
2412 | if (Ty->getElementType()->isIncompleteType()) | |||
2413 | Align = 0; | |||
2414 | else | |||
2415 | Align = getTypeAlignIfRequired(Ty->getElementType(), CGM.getContext()); | |||
2416 | } else if (Ty->isIncompleteType()) { | |||
2417 | Size = 0; | |||
2418 | Align = 0; | |||
2419 | } else { | |||
2420 | // Size and align of the whole array, not the element type. | |||
2421 | Size = CGM.getContext().getTypeSize(Ty); | |||
2422 | Align = getTypeAlignIfRequired(Ty, CGM.getContext()); | |||
2423 | } | |||
2424 | ||||
2425 | // Add the dimensions of the array. FIXME: This loses CV qualifiers from | |||
2426 | // interior arrays, do we care? Why aren't nested arrays represented the | |||
2427 | // obvious/recursive way? | |||
2428 | SmallVector<llvm::Metadata *, 8> Subscripts; | |||
2429 | QualType EltTy(Ty, 0); | |||
2430 | while ((Ty = dyn_cast<ArrayType>(EltTy))) { | |||
2431 | // If the number of elements is known, then count is that number. Otherwise, | |||
2432 | // it's -1. This allows us to represent a subrange with an array of 0 | |||
2433 | // elements, like this: | |||
2434 | // | |||
2435 | // struct foo { | |||
2436 | // int x[0]; | |||
2437 | // }; | |||
2438 | int64_t Count = -1; // Count == -1 is an unbounded array. | |||
2439 | if (const auto *CAT = dyn_cast<ConstantArrayType>(Ty)) | |||
2440 | Count = CAT->getSize().getZExtValue(); | |||
2441 | else if (const auto *VAT = dyn_cast<VariableArrayType>(Ty)) { | |||
2442 | if (Expr *Size = VAT->getSizeExpr()) { | |||
2443 | llvm::APSInt V; | |||
2444 | if (Size->EvaluateAsInt(V, CGM.getContext())) | |||
2445 | Count = V.getExtValue(); | |||
2446 | } | |||
2447 | } | |||
2448 | ||||
2449 | auto SizeNode = SizeExprCache.find(EltTy); | |||
2450 | if (SizeNode != SizeExprCache.end()) | |||
2451 | Subscripts.push_back( | |||
2452 | DBuilder.getOrCreateSubrange(0, SizeNode->getSecond())); | |||
2453 | else | |||
2454 | Subscripts.push_back(DBuilder.getOrCreateSubrange(0, Count)); | |||
2455 | EltTy = Ty->getElementType(); | |||
2456 | } | |||
2457 | ||||
2458 | llvm::DINodeArray SubscriptArray = DBuilder.getOrCreateArray(Subscripts); | |||
2459 | ||||
2460 | return DBuilder.createArrayType(Size, Align, getOrCreateType(EltTy, Unit), | |||
2461 | SubscriptArray); | |||
2462 | } | |||
2463 | ||||
2464 | llvm::DIType *CGDebugInfo::CreateType(const LValueReferenceType *Ty, | |||
2465 | llvm::DIFile *Unit) { | |||
2466 | return CreatePointerLikeType(llvm::dwarf::DW_TAG_reference_type, Ty, | |||
2467 | Ty->getPointeeType(), Unit); | |||
2468 | } | |||
2469 | ||||
2470 | llvm::DIType *CGDebugInfo::CreateType(const RValueReferenceType *Ty, | |||
2471 | llvm::DIFile *Unit) { | |||
2472 | return CreatePointerLikeType(llvm::dwarf::DW_TAG_rvalue_reference_type, Ty, | |||
2473 | Ty->getPointeeType(), Unit); | |||
2474 | } | |||
2475 | ||||
2476 | llvm::DIType *CGDebugInfo::CreateType(const MemberPointerType *Ty, | |||
2477 | llvm::DIFile *U) { | |||
2478 | llvm::DINode::DIFlags Flags = llvm::DINode::FlagZero; | |||
2479 | uint64_t Size = 0; | |||
2480 | ||||
2481 | if (!Ty->isIncompleteType()) { | |||
2482 | Size = CGM.getContext().getTypeSize(Ty); | |||
2483 | ||||
2484 | // Set the MS inheritance model. There is no flag for the unspecified model. | |||
2485 | if (CGM.getTarget().getCXXABI().isMicrosoft()) { | |||
2486 | switch (Ty->getMostRecentCXXRecordDecl()->getMSInheritanceModel()) { | |||
2487 | case MSInheritanceAttr::Keyword_single_inheritance: | |||
2488 | Flags |= llvm::DINode::FlagSingleInheritance; | |||
2489 | break; | |||
2490 | case MSInheritanceAttr::Keyword_multiple_inheritance: | |||
2491 | Flags |= llvm::DINode::FlagMultipleInheritance; | |||
2492 | break; | |||
2493 | case MSInheritanceAttr::Keyword_virtual_inheritance: | |||
2494 | Flags |= llvm::DINode::FlagVirtualInheritance; | |||
2495 | break; | |||
2496 | case MSInheritanceAttr::Keyword_unspecified_inheritance: | |||
2497 | break; | |||
2498 | } | |||
2499 | } | |||
2500 | } | |||
2501 | ||||
2502 | llvm::DIType *ClassType = getOrCreateType(QualType(Ty->getClass(), 0), U); | |||
2503 | if (Ty->isMemberDataPointerType()) | |||
2504 | return DBuilder.createMemberPointerType( | |||
2505 | getOrCreateType(Ty->getPointeeType(), U), ClassType, Size, /*Align=*/0, | |||
2506 | Flags); | |||
2507 | ||||
2508 | const FunctionProtoType *FPT = | |||
2509 | Ty->getPointeeType()->getAs<FunctionProtoType>(); | |||
2510 | return DBuilder.createMemberPointerType( | |||
2511 | getOrCreateInstanceMethodType(CGM.getContext().getPointerType(QualType( | |||
2512 | Ty->getClass(), FPT->getTypeQuals())), | |||
2513 | FPT, U), | |||
2514 | ClassType, Size, /*Align=*/0, Flags); | |||
2515 | } | |||
2516 | ||||
2517 | llvm::DIType *CGDebugInfo::CreateType(const AtomicType *Ty, llvm::DIFile *U) { | |||
2518 | auto *FromTy = getOrCreateType(Ty->getValueType(), U); | |||
2519 | return DBuilder.createQualifiedType(llvm::dwarf::DW_TAG_atomic_type, FromTy); | |||
2520 | } | |||
2521 | ||||
2522 | llvm::DIType *CGDebugInfo::CreateType(const PipeType *Ty, llvm::DIFile *U) { | |||
2523 | return getOrCreateType(Ty->getElementType(), U); | |||
2524 | } | |||
2525 | ||||
2526 | llvm::DIType *CGDebugInfo::CreateEnumType(const EnumType *Ty) { | |||
2527 | const EnumDecl *ED = Ty->getDecl(); | |||
2528 | ||||
2529 | uint64_t Size = 0; | |||
2530 | uint32_t Align = 0; | |||
2531 | if (!ED->getTypeForDecl()->isIncompleteType()) { | |||
2532 | Size = CGM.getContext().getTypeSize(ED->getTypeForDecl()); | |||
2533 | Align = getDeclAlignIfRequired(ED, CGM.getContext()); | |||
2534 | } | |||
2535 | ||||
2536 | SmallString<256> Identifier = getTypeIdentifier(Ty, CGM, TheCU); | |||
2537 | ||||
2538 | bool isImportedFromModule = | |||
2539 | DebugTypeExtRefs && ED->isFromASTFile() && ED->getDefinition(); | |||
2540 | ||||
2541 | // If this is just a forward declaration, construct an appropriately | |||
2542 | // marked node and just return it. | |||
2543 | if (isImportedFromModule || !ED->getDefinition()) { | |||
2544 | // Note that it is possible for enums to be created as part of | |||
2545 | // their own declcontext. In this case a FwdDecl will be created | |||
2546 | // twice. This doesn't cause a problem because both FwdDecls are | |||
2547 | // entered into the ReplaceMap: finalize() will replace the first | |||
2548 | // FwdDecl with the second and then replace the second with | |||
2549 | // complete type. | |||
2550 | llvm::DIScope *EDContext = getDeclContextDescriptor(ED); | |||
2551 | llvm::DIFile *DefUnit = getOrCreateFile(ED->getLocation()); | |||
2552 | llvm::TempDIScope TmpContext(DBuilder.createReplaceableCompositeType( | |||
2553 | llvm::dwarf::DW_TAG_enumeration_type, "", TheCU, DefUnit, 0)); | |||
2554 | ||||
2555 | unsigned Line = getLineNumber(ED->getLocation()); | |||
2556 | StringRef EDName = ED->getName(); | |||
2557 | llvm::DIType *RetTy = DBuilder.createReplaceableCompositeType( | |||
2558 | llvm::dwarf::DW_TAG_enumeration_type, EDName, EDContext, DefUnit, Line, | |||
2559 | 0, Size, Align, llvm::DINode::FlagFwdDecl, Identifier); | |||
2560 | ||||
2561 | ReplaceMap.emplace_back( | |||
2562 | std::piecewise_construct, std::make_tuple(Ty), | |||
2563 | std::make_tuple(static_cast<llvm::Metadata *>(RetTy))); | |||
2564 | return RetTy; | |||
2565 | } | |||
2566 | ||||
2567 | return CreateTypeDefinition(Ty); | |||
2568 | } | |||
2569 | ||||
2570 | llvm::DIType *CGDebugInfo::CreateTypeDefinition(const EnumType *Ty) { | |||
2571 | const EnumDecl *ED = Ty->getDecl(); | |||
2572 | uint64_t Size = 0; | |||
2573 | uint32_t Align = 0; | |||
2574 | if (!ED->getTypeForDecl()->isIncompleteType()) { | |||
2575 | Size = CGM.getContext().getTypeSize(ED->getTypeForDecl()); | |||
2576 | Align = getDeclAlignIfRequired(ED, CGM.getContext()); | |||
2577 | } | |||
2578 | ||||
2579 | SmallString<256> Identifier = getTypeIdentifier(Ty, CGM, TheCU); | |||
2580 | ||||
2581 | // Create elements for each enumerator. | |||
2582 | SmallVector<llvm::Metadata *, 16> Enumerators; | |||
2583 | ED = ED->getDefinition(); | |||
2584 | bool IsSigned = ED->getIntegerType()->isSignedIntegerType(); | |||
2585 | for (const auto *Enum : ED->enumerators()) { | |||
2586 | const auto &InitVal = Enum->getInitVal(); | |||
2587 | auto Value = IsSigned ? InitVal.getSExtValue() : InitVal.getZExtValue(); | |||
2588 | Enumerators.push_back( | |||
2589 | DBuilder.createEnumerator(Enum->getName(), Value, !IsSigned)); | |||
2590 | } | |||
2591 | ||||
2592 | // Return a CompositeType for the enum itself. | |||
2593 | llvm::DINodeArray EltArray = DBuilder.getOrCreateArray(Enumerators); | |||
2594 | ||||
2595 | llvm::DIFile *DefUnit = getOrCreateFile(ED->getLocation()); | |||
2596 | unsigned Line = getLineNumber(ED->getLocation()); | |||
2597 | llvm::DIScope *EnumContext = getDeclContextDescriptor(ED); | |||
2598 | llvm::DIType *ClassTy = getOrCreateType(ED->getIntegerType(), DefUnit); | |||
2599 | return DBuilder.createEnumerationType(EnumContext, ED->getName(), DefUnit, | |||
2600 | Line, Size, Align, EltArray, ClassTy, | |||
2601 | Identifier, ED->isFixed()); | |||
2602 | } | |||
2603 | ||||
2604 | llvm::DIMacro *CGDebugInfo::CreateMacro(llvm::DIMacroFile *Parent, | |||
2605 | unsigned MType, SourceLocation LineLoc, | |||
2606 | StringRef Name, StringRef Value) { | |||
2607 | unsigned Line = LineLoc.isInvalid() ? 0 : getLineNumber(LineLoc); | |||
2608 | return DBuilder.createMacro(Parent, Line, MType, Name, Value); | |||
2609 | } | |||
2610 | ||||
2611 | llvm::DIMacroFile *CGDebugInfo::CreateTempMacroFile(llvm::DIMacroFile *Parent, | |||
2612 | SourceLocation LineLoc, | |||
2613 | SourceLocation FileLoc) { | |||
2614 | llvm::DIFile *FName = getOrCreateFile(FileLoc); | |||
2615 | unsigned Line = LineLoc.isInvalid() ? 0 : getLineNumber(LineLoc); | |||
2616 | return DBuilder.createTempMacroFile(Parent, Line, FName); | |||
2617 | } | |||
2618 | ||||
2619 | static QualType UnwrapTypeForDebugInfo(QualType T, const ASTContext &C) { | |||
2620 | Qualifiers Quals; | |||
2621 | do { | |||
2622 | Qualifiers InnerQuals = T.getLocalQualifiers(); | |||
2623 | // Qualifiers::operator+() doesn't like it if you add a Qualifier | |||
2624 | // that is already there. | |||
2625 | Quals += Qualifiers::removeCommonQualifiers(Quals, InnerQuals); | |||
2626 | Quals += InnerQuals; | |||
2627 | QualType LastT = T; | |||
2628 | switch (T->getTypeClass()) { | |||
2629 | default: | |||
2630 | return C.getQualifiedType(T.getTypePtr(), Quals); | |||
2631 | case Type::TemplateSpecialization: { | |||
2632 | const auto *Spec = cast<TemplateSpecializationType>(T); | |||
2633 | if (Spec->isTypeAlias()) | |||
2634 | return C.getQualifiedType(T.getTypePtr(), Quals); | |||
2635 | T = Spec->desugar(); | |||
2636 | break; | |||
2637 | } | |||
2638 | case Type::TypeOfExpr: | |||
2639 | T = cast<TypeOfExprType>(T)->getUnderlyingExpr()->getType(); | |||
2640 | break; | |||
2641 | case Type::TypeOf: | |||
2642 | T = cast<TypeOfType>(T)->getUnderlyingType(); | |||
2643 | break; | |||
2644 | case Type::Decltype: | |||
2645 | T = cast<DecltypeType>(T)->getUnderlyingType(); | |||
2646 | break; | |||
2647 | case Type::UnaryTransform: | |||
2648 | T = cast<UnaryTransformType>(T)->getUnderlyingType(); | |||
2649 | break; | |||
2650 | case Type::Attributed: | |||
2651 | T = cast<AttributedType>(T)->getEquivalentType(); | |||
2652 | break; | |||
2653 | case Type::Elaborated: | |||
2654 | T = cast<ElaboratedType>(T)->getNamedType(); | |||
2655 | break; | |||
2656 | case Type::Paren: | |||
2657 | T = cast<ParenType>(T)->getInnerType(); | |||
2658 | break; | |||
2659 | case Type::SubstTemplateTypeParm: | |||
2660 | T = cast<SubstTemplateTypeParmType>(T)->getReplacementType(); | |||
2661 | break; | |||
2662 | case Type::Auto: | |||
2663 | case Type::DeducedTemplateSpecialization: { | |||
2664 | QualType DT = cast<DeducedType>(T)->getDeducedType(); | |||
2665 | assert(!DT.isNull() && "Undeduced types shouldn't reach here.")(static_cast <bool> (!DT.isNull() && "Undeduced types shouldn't reach here." ) ? void (0) : __assert_fail ("!DT.isNull() && \"Undeduced types shouldn't reach here.\"" , "/build/llvm-toolchain-snapshot-7~svn338205/tools/clang/lib/CodeGen/CGDebugInfo.cpp" , 2665, __extension__ __PRETTY_FUNCTION__)); | |||
2666 | T = DT; | |||
2667 | break; | |||
2668 | } | |||
2669 | case Type::Adjusted: | |||
2670 | case Type::Decayed: | |||
2671 | // Decayed and adjusted types use the adjusted type in LLVM and DWARF. | |||
2672 | T = cast<AdjustedType>(T)->getAdjustedType(); | |||
2673 | break; | |||
2674 | } | |||
2675 | ||||
2676 | assert(T != LastT && "Type unwrapping failed to unwrap!")(static_cast <bool> (T != LastT && "Type unwrapping failed to unwrap!" ) ? void (0) : __assert_fail ("T != LastT && \"Type unwrapping failed to unwrap!\"" , "/build/llvm-toolchain-snapshot-7~svn338205/tools/clang/lib/CodeGen/CGDebugInfo.cpp" , 2676, __extension__ __PRETTY_FUNCTION__)); | |||
2677 | (void)LastT; | |||
2678 | } while (true); | |||
2679 | } | |||
2680 | ||||
2681 | llvm::DIType *CGDebugInfo::getTypeOrNull(QualType Ty) { | |||
2682 | ||||
2683 | // Unwrap the type as needed for debug information. | |||
2684 | Ty = UnwrapTypeForDebugInfo(Ty, CGM.getContext()); | |||
2685 | ||||
2686 | auto It = TypeCache.find(Ty.getAsOpaquePtr()); | |||
2687 | if (It != TypeCache.end()) { | |||
2688 | // Verify that the debug info still exists. | |||
2689 | if (llvm::Metadata *V = It->second) | |||
2690 | return cast<llvm::DIType>(V); | |||
2691 | } | |||
2692 | ||||
2693 | return nullptr; | |||
2694 | } | |||
2695 | ||||
2696 | void CGDebugInfo::completeTemplateDefinition( | |||
2697 | const ClassTemplateSpecializationDecl &SD) { | |||
2698 | if (DebugKind <= codegenoptions::DebugLineTablesOnly) | |||
2699 | return; | |||
2700 | completeUnusedClass(SD); | |||
2701 | } | |||
2702 | ||||
2703 | void CGDebugInfo::completeUnusedClass(const CXXRecordDecl &D) { | |||
2704 | if (DebugKind <= codegenoptions::DebugLineTablesOnly) | |||
2705 | return; | |||
2706 | ||||
2707 | completeClassData(&D); | |||
2708 | // In case this type has no member function definitions being emitted, ensure | |||
2709 | // it is retained | |||
2710 | RetainedTypes.push_back(CGM.getContext().getRecordType(&D).getAsOpaquePtr()); | |||
2711 | } | |||
2712 | ||||
2713 | llvm::DIType *CGDebugInfo::getOrCreateType(QualType Ty, llvm::DIFile *Unit) { | |||
2714 | if (Ty.isNull()) | |||
2715 | return nullptr; | |||
2716 | ||||
2717 | // Unwrap the type as needed for debug information. | |||
2718 | Ty = UnwrapTypeForDebugInfo(Ty, CGM.getContext()); | |||
2719 | ||||
2720 | if (auto *T = getTypeOrNull(Ty)) | |||
2721 | return T; | |||
2722 | ||||
2723 | llvm::DIType *Res = CreateTypeNode(Ty, Unit); | |||
2724 | void *TyPtr = Ty.getAsOpaquePtr(); | |||
2725 | ||||
2726 | // And update the type cache. | |||
2727 | TypeCache[TyPtr].reset(Res); | |||
2728 | ||||
2729 | return Res; | |||
2730 | } | |||
2731 | ||||
2732 | llvm::DIModule *CGDebugInfo::getParentModuleOrNull(const Decl *D) { | |||
2733 | // A forward declaration inside a module header does not belong to the module. | |||
2734 | if (isa<RecordDecl>(D) && !cast<RecordDecl>(D)->getDefinition()) | |||
2735 | return nullptr; | |||
2736 | if (DebugTypeExtRefs && D->isFromASTFile()) { | |||
2737 | // Record a reference to an imported clang module or precompiled header. | |||
2738 | auto *Reader = CGM.getContext().getExternalSource(); | |||
2739 | auto Idx = D->getOwningModuleID(); | |||
2740 | auto Info = Reader->getSourceDescriptor(Idx); | |||
2741 | if (Info) | |||
2742 | return getOrCreateModuleRef(*Info, /*SkeletonCU=*/true); | |||
2743 | } else if (ClangModuleMap) { | |||
2744 | // We are building a clang module or a precompiled header. | |||
2745 | // | |||
2746 | // TODO: When D is a CXXRecordDecl or a C++ Enum, the ODR applies | |||
2747 | // and it wouldn't be necessary to specify the parent scope | |||
2748 | // because the type is already unique by definition (it would look | |||
2749 | // like the output of -fno-standalone-debug). On the other hand, | |||
2750 | // the parent scope helps a consumer to quickly locate the object | |||
2751 | // file where the type's definition is located, so it might be | |||
2752 | // best to make this behavior a command line or debugger tuning | |||
2753 | // option. | |||
2754 | if (Module *M = D->getOwningModule()) { | |||
2755 | // This is a (sub-)module. | |||
2756 | auto Info = ExternalASTSource::ASTSourceDescriptor(*M); | |||
2757 | return getOrCreateModuleRef(Info, /*SkeletonCU=*/false); | |||
2758 | } else { | |||
2759 | // This the precompiled header being built. | |||
2760 | return getOrCreateModuleRef(PCHDescriptor, /*SkeletonCU=*/false); | |||
2761 | } | |||
2762 | } | |||
2763 | ||||
2764 | return nullptr; | |||
2765 | } | |||
2766 | ||||
2767 | llvm::DIType *CGDebugInfo::CreateTypeNode(QualType Ty, llvm::DIFile *Unit) { | |||
2768 | // Handle qualifiers, which recursively handles what they refer to. | |||
2769 | if (Ty.hasLocalQualifiers()) | |||
2770 | return CreateQualifiedType(Ty, Unit); | |||
2771 | ||||
2772 | // Work out details of type. | |||
2773 | switch (Ty->getTypeClass()) { | |||
2774 | #define TYPE(Class, Base) | |||
2775 | #define ABSTRACT_TYPE(Class, Base) | |||
2776 | #define NON_CANONICAL_TYPE(Class, Base) | |||
2777 | #define DEPENDENT_TYPE(Class, Base) case Type::Class: | |||
2778 | #include "clang/AST/TypeNodes.def" | |||
2779 | 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-7~svn338205/tools/clang/lib/CodeGen/CGDebugInfo.cpp" , 2779); | |||
2780 | ||||
2781 | case Type::ExtVector: | |||
2782 | case Type::Vector: | |||
2783 | return CreateType(cast<VectorType>(Ty), Unit); | |||
2784 | case Type::ObjCObjectPointer: | |||
2785 | return CreateType(cast<ObjCObjectPointerType>(Ty), Unit); | |||
2786 | case Type::ObjCObject: | |||
2787 | return CreateType(cast<ObjCObjectType>(Ty), Unit); | |||
2788 | case Type::ObjCTypeParam: | |||
2789 | return CreateType(cast<ObjCTypeParamType>(Ty), Unit); | |||
2790 | case Type::ObjCInterface: | |||
2791 | return CreateType(cast<ObjCInterfaceType>(Ty), Unit); | |||
2792 | case Type::Builtin: | |||
2793 | return CreateType(cast<BuiltinType>(Ty)); | |||
2794 | case Type::Complex: | |||
2795 | return CreateType(cast<ComplexType>(Ty)); | |||
2796 | case Type::Pointer: | |||
2797 | return CreateType(cast<PointerType>(Ty), Unit); | |||
2798 | case Type::BlockPointer: | |||
2799 | return CreateType(cast<BlockPointerType>(Ty), Unit); | |||
2800 | case Type::Typedef: | |||
2801 | return CreateType(cast<TypedefType>(Ty), Unit); | |||
2802 | case Type::Record: | |||
2803 | return CreateType(cast<RecordType>(Ty)); | |||
2804 | case Type::Enum: | |||
2805 | return CreateEnumType(cast<EnumType>(Ty)); | |||
2806 | case Type::FunctionProto: | |||
2807 | case Type::FunctionNoProto: | |||
2808 | return CreateType(cast<FunctionType>(Ty), Unit); | |||
2809 | case Type::ConstantArray: | |||
2810 | case Type::VariableArray: | |||
2811 | case Type::IncompleteArray: | |||
2812 | return CreateType(cast<ArrayType>(Ty), Unit); | |||
2813 | ||||
2814 | case Type::LValueReference: | |||
2815 | return CreateType(cast<LValueReferenceType>(Ty), Unit); | |||
2816 | case Type::RValueReference: | |||
2817 | return CreateType(cast<RValueReferenceType>(Ty), Unit); | |||
2818 | ||||
2819 | case Type::MemberPointer: | |||
2820 | return CreateType(cast<MemberPointerType>(Ty), Unit); | |||
2821 | ||||
2822 | case Type::Atomic: | |||
2823 | return CreateType(cast<AtomicType>(Ty), Unit); | |||
2824 | ||||
2825 | case Type::Pipe: | |||
2826 | return CreateType(cast<PipeType>(Ty), Unit); | |||
2827 | ||||
2828 | case Type::TemplateSpecialization: | |||
2829 | return CreateType(cast<TemplateSpecializationType>(Ty), Unit); | |||
2830 | ||||
2831 | case Type::Auto: | |||
2832 | case Type::Attributed: | |||
2833 | case Type::Adjusted: | |||
2834 | case Type::Decayed: | |||
2835 | case Type::DeducedTemplateSpecialization: | |||
2836 | case Type::Elaborated: | |||
2837 | case Type::Paren: | |||
2838 | case Type::SubstTemplateTypeParm: | |||
2839 | case Type::TypeOfExpr: | |||
2840 | case Type::TypeOf: | |||
2841 | case Type::Decltype: | |||
2842 | case Type::UnaryTransform: | |||
2843 | case Type::PackExpansion: | |||
2844 | break; | |||
2845 | } | |||
2846 | ||||
2847 | llvm_unreachable("type should have been unwrapped!")::llvm::llvm_unreachable_internal("type should have been unwrapped!" , "/build/llvm-toolchain-snapshot-7~svn338205/tools/clang/lib/CodeGen/CGDebugInfo.cpp" , 2847); | |||
2848 | } | |||
2849 | ||||
2850 | llvm::DICompositeType *CGDebugInfo::getOrCreateLimitedType(const RecordType *Ty, | |||
2851 | llvm::DIFile *Unit) { | |||
2852 | QualType QTy(Ty, 0); | |||
2853 | ||||
2854 | auto *T = cast_or_null<llvm::DICompositeType>(getTypeOrNull(QTy)); | |||
2855 | ||||
2856 | // We may have cached a forward decl when we could have created | |||
2857 | // a non-forward decl. Go ahead and create a non-forward decl | |||
2858 | // now. | |||
2859 | if (T && !T->isForwardDecl()) | |||
2860 | return T; | |||
2861 | ||||
2862 | // Otherwise create the type. | |||
2863 | llvm::DICompositeType *Res = CreateLimitedType(Ty); | |||
2864 | ||||
2865 | // Propagate members from the declaration to the definition | |||
2866 | // CreateType(const RecordType*) will overwrite this with the members in the | |||
2867 | // correct order if the full type is needed. | |||
2868 | DBuilder.replaceArrays(Res, T ? T->getElements() : llvm::DINodeArray()); | |||
2869 | ||||
2870 | // And update the type cache. | |||
2871 | TypeCache[QTy.getAsOpaquePtr()].reset(Res); | |||
2872 | return Res; | |||
2873 | } | |||
2874 | ||||
2875 | // TODO: Currently used for context chains when limiting debug info. | |||
2876 | llvm::DICompositeType *CGDebugInfo::CreateLimitedType(const RecordType *Ty) { | |||
2877 | RecordDecl *RD = Ty->getDecl(); | |||
2878 | ||||
2879 | // Get overall information about the record type for the debug info. | |||
2880 | llvm::DIFile *DefUnit = getOrCreateFile(RD->getLocation()); | |||
2881 | unsigned Line = getLineNumber(RD->getLocation()); | |||
2882 | StringRef RDName = getClassName(RD); | |||
2883 | ||||
2884 | llvm::DIScope *RDContext = getDeclContextDescriptor(RD); | |||
2885 | ||||
2886 | // If we ended up creating the type during the context chain construction, | |||
2887 | // just return that. | |||
2888 | auto *T = cast_or_null<llvm::DICompositeType>( | |||
2889 | getTypeOrNull(CGM.getContext().getRecordType(RD))); | |||
2890 | if (T && (!T->isForwardDecl() || !RD->getDefinition())) | |||
2891 | return T; | |||
2892 | ||||
2893 | // If this is just a forward or incomplete declaration, construct an | |||
2894 | // appropriately marked node and just return it. | |||
2895 | const RecordDecl *D = RD->getDefinition(); | |||
2896 | if (!D || !D->isCompleteDefinition()) | |||
2897 | return getOrCreateRecordFwdDecl(Ty, RDContext); | |||
2898 | ||||
2899 | uint64_t Size = CGM.getContext().getTypeSize(Ty); | |||
2900 | auto Align = getDeclAlignIfRequired(D, CGM.getContext()); | |||
2901 | ||||
2902 | SmallString<256> Identifier = getTypeIdentifier(Ty, CGM, TheCU); | |||
2903 | ||||
2904 | // Explicitly record the calling convention for C++ records. | |||
2905 | auto Flags = llvm::DINode::FlagZero; | |||
2906 | if (auto CXXRD = dyn_cast<CXXRecordDecl>(RD)) { | |||
2907 | if (CGM.getCXXABI().getRecordArgABI(CXXRD) == CGCXXABI::RAA_Indirect) | |||
2908 | Flags |= llvm::DINode::FlagTypePassByReference; | |||
2909 | else | |||
2910 | Flags |= llvm::DINode::FlagTypePassByValue; | |||
2911 | ||||
2912 | // Record if a C++ record is trivial type. | |||
2913 | if (CXXRD->isTrivial()) | |||
2914 | Flags |= llvm::DINode::FlagTrivial; | |||
2915 | } | |||
2916 | ||||
2917 | llvm::DICompositeType *RealDecl = DBuilder.createReplaceableCompositeType( | |||
2918 | getTagForRecord(RD), RDName, RDContext, DefUnit, Line, 0, Size, Align, | |||
2919 | Flags, Identifier); | |||
2920 | ||||
2921 | // Elements of composite types usually have back to the type, creating | |||
2922 | // uniquing cycles. Distinct nodes are more efficient. | |||
2923 | switch (RealDecl->getTag()) { | |||
2924 | default: | |||
2925 | llvm_unreachable("invalid composite type tag")::llvm::llvm_unreachable_internal("invalid composite type tag" , "/build/llvm-toolchain-snapshot-7~svn338205/tools/clang/lib/CodeGen/CGDebugInfo.cpp" , 2925); | |||
2926 | ||||
2927 | case llvm::dwarf::DW_TAG_array_type: | |||
2928 | case llvm::dwarf::DW_TAG_enumeration_type: | |||
2929 | // Array elements and most enumeration elements don't have back references, | |||
2930 | // so they don't tend to be involved in uniquing cycles and there is some | |||
2931 | // chance of merging them when linking together two modules. Only make | |||
2932 | // them distinct if they are ODR-uniqued. | |||
2933 | if (Identifier.empty()) | |||
2934 | break; | |||
2935 | LLVM_FALLTHROUGH[[clang::fallthrough]]; | |||
2936 | ||||
2937 | case llvm::dwarf::DW_TAG_structure_type: | |||
2938 | case llvm::dwarf::DW_TAG_union_type: | |||
2939 | case llvm::dwarf::DW_TAG_class_type: | |||
2940 | // Immediately resolve to a distinct node. | |||
2941 | RealDecl = | |||
2942 | llvm::MDNode::replaceWithDistinct(llvm::TempDICompositeType(RealDecl)); | |||
2943 | break; | |||
2944 | } | |||
2945 | ||||
2946 | RegionMap[Ty->getDecl()].reset(RealDecl); | |||
2947 | TypeCache[QualType(Ty, 0).getAsOpaquePtr()].reset(RealDecl); | |||
2948 | ||||
2949 | if (const auto *TSpecial = dyn_cast<ClassTemplateSpecializationDecl>(RD)) | |||
2950 | DBuilder.replaceArrays(RealDecl, llvm::DINodeArray(), | |||
2951 | CollectCXXTemplateParams(TSpecial, DefUnit)); | |||
2952 | return RealDecl; | |||
2953 | } | |||
2954 | ||||
2955 | void CGDebugInfo::CollectContainingType(const CXXRecordDecl *RD, | |||
2956 | llvm::DICompositeType *RealDecl) { | |||
2957 | // A class's primary base or the class itself contains the vtable. | |||
2958 | llvm::DICompositeType *ContainingType = nullptr; | |||
2959 | const ASTRecordLayout &RL = CGM.getContext().getASTRecordLayout(RD); | |||
2960 | if (const CXXRecordDecl *PBase = RL.getPrimaryBase()) { | |||
2961 | // Seek non-virtual primary base root. | |||
2962 | while (1) { | |||
2963 | const ASTRecordLayout &BRL = CGM.getContext().getASTRecordLayout(PBase); | |||
2964 | const CXXRecordDecl *PBT = BRL.getPrimaryBase(); | |||
2965 | if (PBT && !BRL.isPrimaryBaseVirtual()) | |||
2966 | PBase = PBT; | |||
2967 | else | |||
2968 | break; | |||
2969 | } | |||
2970 | ContainingType = cast<llvm::DICompositeType>( | |||
2971 | getOrCreateType(QualType(PBase->getTypeForDecl(), 0), | |||
2972 | getOrCreateFile(RD->getLocation()))); | |||
2973 | } else if (RD->isDynamicClass()) | |||
2974 | ContainingType = RealDecl; | |||
2975 | ||||
2976 | DBuilder.replaceVTableHolder(RealDecl, ContainingType); | |||
2977 | } | |||
2978 | ||||
2979 | llvm::DIType *CGDebugInfo::CreateMemberType(llvm::DIFile *Unit, QualType FType, | |||
2980 | StringRef Name, uint64_t *Offset) { | |||
2981 | llvm::DIType *FieldTy = CGDebugInfo::getOrCreateType(FType, Unit); | |||
2982 | uint64_t FieldSize = CGM.getContext().getTypeSize(FType); | |||
2983 | auto FieldAlign = getTypeAlignIfRequired(FType, CGM.getContext()); | |||
2984 | llvm::DIType *Ty = | |||
2985 | DBuilder.createMemberType(Unit, Name, Unit, 0, FieldSize, FieldAlign, | |||
2986 | *Offset, llvm::DINode::FlagZero, FieldTy); | |||
2987 | *Offset += FieldSize; | |||
2988 | return Ty; | |||
2989 | } | |||
2990 | ||||
2991 | void CGDebugInfo::collectFunctionDeclProps(GlobalDecl GD, llvm::DIFile *Unit, | |||
2992 | StringRef &Name, | |||
2993 | StringRef &LinkageName, | |||
2994 | llvm::DIScope *&FDContext, | |||
2995 | llvm::DINodeArray &TParamsArray, | |||
2996 | llvm::DINode::DIFlags &Flags) { | |||
2997 | const auto *FD = cast<FunctionDecl>(GD.getDecl()); | |||
2998 | Name = getFunctionName(FD); | |||
2999 | // Use mangled name as linkage name for C/C++ functions. | |||
3000 | if (FD->hasPrototype()) { | |||
3001 | LinkageName = CGM.getMangledName(GD); | |||
3002 | Flags |= llvm::DINode::FlagPrototyped; | |||
3003 | } | |||
3004 | // No need to replicate the linkage name if it isn't different from the | |||
3005 | // subprogram name, no need to have it at all unless coverage is enabled or | |||
3006 | // debug is set to more than just line tables or extra debug info is needed. | |||
3007 | if (LinkageName == Name || (!CGM.getCodeGenOpts().EmitGcovArcs && | |||
3008 | !CGM.getCodeGenOpts().EmitGcovNotes && | |||
3009 | !CGM.getCodeGenOpts().DebugInfoForProfiling && | |||
3010 | DebugKind <= codegenoptions::DebugLineTablesOnly)) | |||
3011 | LinkageName = StringRef(); | |||
3012 | ||||
3013 | if (DebugKind >= codegenoptions::LimitedDebugInfo) { | |||
3014 | if (const NamespaceDecl *NSDecl = | |||
3015 | dyn_cast_or_null<NamespaceDecl>(FD->getDeclContext())) | |||
3016 | FDContext = getOrCreateNamespace(NSDecl); | |||
3017 | else if (const RecordDecl *RDecl = | |||
3018 | dyn_cast_or_null<RecordDecl>(FD->getDeclContext())) { | |||
3019 | llvm::DIScope *Mod = getParentModuleOrNull(RDecl); | |||
3020 | FDContext = getContextDescriptor(RDecl, Mod ? Mod : TheCU); | |||
3021 | } | |||
3022 | // Check if it is a noreturn-marked function | |||
3023 | if (FD->isNoReturn()) | |||
3024 | Flags |= llvm::DINode::FlagNoReturn; | |||
3025 | // Collect template parameters. | |||
3026 | TParamsArray = CollectFunctionTemplateParams(FD, Unit); | |||
3027 | } | |||
3028 | } | |||
3029 | ||||
3030 | void CGDebugInfo::collectVarDeclProps(const VarDecl *VD, llvm::DIFile *&Unit, | |||
3031 | unsigned &LineNo, QualType &T, | |||
3032 | StringRef &Name, StringRef &LinkageName, | |||
3033 | llvm::DIScope *&VDContext) { | |||
3034 | Unit = getOrCreateFile(VD->getLocation()); | |||
3035 | LineNo = getLineNumber(VD->getLocation()); | |||
3036 | ||||
3037 | setLocation(VD->getLocation()); | |||
3038 | ||||
3039 | T = VD->getType(); | |||
3040 | if (T->isIncompleteArrayType()) { | |||
3041 | // CodeGen turns int[] into int[1] so we'll do the same here. | |||
3042 | llvm::APInt ConstVal(32, 1); | |||
3043 | QualType ET = CGM.getContext().getAsArrayType(T)->getElementType(); | |||
3044 | ||||
3045 | T = CGM.getContext().getConstantArrayType(ET, ConstVal, ArrayType::Normal, | |||
3046 | 0); | |||
3047 | } | |||
3048 | ||||
3049 | Name = VD->getName(); | |||
3050 | if (VD->getDeclContext() && !isa<FunctionDecl>(VD->getDeclContext()) && | |||
3051 | !isa<ObjCMethodDecl>(VD->getDeclContext())) | |||
3052 | LinkageName = CGM.getMangledName(VD); | |||
3053 | if (LinkageName == Name) | |||
3054 | LinkageName = StringRef(); | |||
3055 | ||||
3056 | // Since we emit declarations (DW_AT_members) for static members, place the | |||
3057 | // definition of those static members in the namespace they were declared in | |||
3058 | // in the source code (the lexical decl context). | |||
3059 | // FIXME: Generalize this for even non-member global variables where the | |||
3060 | // declaration and definition may have different lexical decl contexts, once | |||
3061 | // we have support for emitting declarations of (non-member) global variables. | |||
3062 | const DeclContext *DC = VD->isStaticDataMember() ? VD->getLexicalDeclContext() | |||
3063 | : VD->getDeclContext(); | |||
3064 | // When a record type contains an in-line initialization of a static data | |||
3065 | // member, and the record type is marked as __declspec(dllexport), an implicit | |||
3066 | // definition of the member will be created in the record context. DWARF | |||
3067 | // doesn't seem to have a nice way to describe this in a form that consumers | |||
3068 | // are likely to understand, so fake the "normal" situation of a definition | |||
3069 | // outside the class by putting it in the global scope. | |||
3070 | if (DC->isRecord()) | |||
3071 | DC = CGM.getContext().getTranslationUnitDecl(); | |||
3072 | ||||
3073 | llvm::DIScope *Mod = getParentModuleOrNull(VD); | |||
3074 | VDContext = getContextDescriptor(cast<Decl>(DC), Mod ? Mod : TheCU); | |||
3075 | } | |||
3076 | ||||
3077 | llvm::DISubprogram *CGDebugInfo::getFunctionFwdDeclOrStub(GlobalDecl GD, | |||
3078 | bool Stub) { | |||
3079 | llvm::DINodeArray TParamsArray; | |||
3080 | StringRef Name, LinkageName; | |||
3081 | llvm::DINode::DIFlags Flags = llvm::DINode::FlagZero; | |||
3082 | SourceLocation Loc = GD.getDecl()->getLocation(); | |||
3083 | llvm::DIFile *Unit = getOrCreateFile(Loc); | |||
3084 | llvm::DIScope *DContext = Unit; | |||
3085 | unsigned Line = getLineNumber(Loc); | |||
3086 | collectFunctionDeclProps(GD, Unit, Name, LinkageName, DContext, TParamsArray, | |||
3087 | Flags); | |||
3088 | auto *FD = dyn_cast<FunctionDecl>(GD.getDecl()); | |||
3089 | ||||
3090 | // Build function type. | |||
3091 | SmallVector<QualType, 16> ArgTypes; | |||
3092 | if (FD) | |||
3093 | for (const ParmVarDecl *Parm : FD->parameters()) | |||
3094 | ArgTypes.push_back(Parm->getType()); | |||
3095 | CallingConv CC = FD->getType()->castAs<FunctionType>()->getCallConv(); | |||
| ||||
3096 | QualType FnType = CGM.getContext().getFunctionType( | |||
3097 | FD->getReturnType(), ArgTypes, FunctionProtoType::ExtProtoInfo(CC)); | |||
3098 | if (Stub) { | |||
3099 | return DBuilder.createFunction( | |||
3100 | DContext, Name, LinkageName, Unit, Line, | |||
3101 | getOrCreateFunctionType(GD.getDecl(), FnType, Unit), | |||
3102 | !FD->isExternallyVisible(), | |||
3103 | /* isDefinition = */ true, 0, Flags, CGM.getLangOpts().Optimize, | |||
3104 | TParamsArray.get(), getFunctionDeclaration(FD)); | |||
3105 | } | |||
3106 | ||||
3107 | llvm::DISubprogram *SP = DBuilder.createTempFunctionFwdDecl( | |||
3108 | DContext, Name, LinkageName, Unit, Line, | |||
3109 | getOrCreateFunctionType(GD.getDecl(), FnType, Unit), | |||
3110 | !FD->isExternallyVisible(), | |||
3111 | /* isDefinition = */ false, 0, Flags, CGM.getLangOpts().Optimize, | |||
3112 | TParamsArray.get(), getFunctionDeclaration(FD)); | |||
3113 | const FunctionDecl *CanonDecl = FD->getCanonicalDecl(); | |||
3114 | FwdDeclReplaceMap.emplace_back(std::piecewise_construct, | |||
3115 | std::make_tuple(CanonDecl), | |||
3116 | std::make_tuple(SP)); | |||
3117 | return SP; | |||
3118 | } | |||
3119 | ||||
3120 | llvm::DISubprogram *CGDebugInfo::getFunctionForwardDeclaration(GlobalDecl GD) { | |||
3121 | return getFunctionFwdDeclOrStub(GD, /* Stub = */ false); | |||
3122 | } | |||
3123 | ||||
3124 | llvm::DISubprogram *CGDebugInfo::getFunctionStub(GlobalDecl GD) { | |||
3125 | return getFunctionFwdDeclOrStub(GD, /* Stub = */ true); | |||
3126 | } | |||
3127 | ||||
3128 | llvm::DIGlobalVariable * | |||
3129 | CGDebugInfo::getGlobalVariableForwardDeclaration(const VarDecl *VD) { | |||
3130 | QualType T; | |||
3131 | StringRef Name, LinkageName; | |||
3132 | SourceLocation Loc = VD->getLocation(); | |||
3133 | llvm::DIFile *Unit = getOrCreateFile(Loc); | |||
3134 | llvm::DIScope *DContext = Unit; | |||
3135 | unsigned Line = getLineNumber(Loc); | |||
3136 | ||||
3137 | collectVarDeclProps(VD, Unit, Line, T, Name, LinkageName, DContext); | |||
3138 | auto Align = getDeclAlignIfRequired(VD, CGM.getContext()); | |||
3139 | auto *GV = DBuilder.createTempGlobalVariableFwdDecl( | |||
3140 | DContext, Name, LinkageName, Unit, Line, getOrCreateType(T, Unit), | |||
3141 | !VD->isExternallyVisible(), nullptr, Align); | |||
3142 | FwdDeclReplaceMap.emplace_back( | |||
3143 | std::piecewise_construct, | |||
3144 | std::make_tuple(cast<VarDecl>(VD->getCanonicalDecl())), | |||
3145 | std::make_tuple(static_cast<llvm::Metadata *>(GV))); | |||
3146 | return GV; | |||
3147 | } | |||
3148 | ||||
3149 | llvm::DINode *CGDebugInfo::getDeclarationOrDefinition(const Decl *D) { | |||
3150 | // We only need a declaration (not a definition) of the type - so use whatever | |||
3151 | // we would otherwise do to get a type for a pointee. (forward declarations in | |||
3152 | // limited debug info, full definitions (if the type definition is available) | |||
3153 | // in unlimited debug info) | |||
3154 | if (const auto *TD = dyn_cast<TypeDecl>(D)) | |||
3155 | return getOrCreateType(CGM.getContext().getTypeDeclType(TD), | |||
3156 | getOrCreateFile(TD->getLocation())); | |||
3157 | auto I = DeclCache.find(D->getCanonicalDecl()); | |||
3158 | ||||
3159 | if (I != DeclCache.end()) { | |||
3160 | auto N = I->second; | |||
3161 | if (auto *GVE = dyn_cast_or_null<llvm::DIGlobalVariableExpression>(N)) | |||
3162 | return GVE->getVariable(); | |||
3163 | return dyn_cast_or_null<llvm::DINode>(N); | |||
3164 | } | |||
3165 | ||||
3166 | // No definition for now. Emit a forward definition that might be | |||
3167 | // merged with a potential upcoming definition. | |||
3168 | if (const auto *FD = dyn_cast<FunctionDecl>(D)) | |||
3169 | return getFunctionForwardDeclaration(FD); | |||
3170 | else if (const auto *VD = dyn_cast<VarDecl>(D)) | |||
3171 | return getGlobalVariableForwardDeclaration(VD); | |||
3172 | ||||
3173 | return nullptr; | |||
3174 | } | |||
3175 | ||||
3176 | llvm::DISubprogram *CGDebugInfo::getFunctionDeclaration(const Decl *D) { | |||
3177 | if (!D || DebugKind <= codegenoptions::DebugLineTablesOnly) | |||
3178 | return nullptr; | |||
3179 | ||||
3180 | const auto *FD = dyn_cast<FunctionDecl>(D); | |||
3181 | if (!FD) | |||
3182 | return nullptr; | |||
3183 | ||||
3184 | // Setup context. | |||
3185 | auto *S = getDeclContextDescriptor(D); | |||
3186 | ||||
3187 | auto MI = SPCache.find(FD->getCanonicalDecl()); | |||
3188 | if (MI == SPCache.end()) { | |||
3189 | if (const auto *MD = dyn_cast<CXXMethodDecl>(FD->getCanonicalDecl())) { | |||
3190 | return CreateCXXMemberFunction(MD, getOrCreateFile(MD->getLocation()), | |||
3191 | cast<llvm::DICompositeType>(S)); | |||
3192 | } | |||
3193 | } | |||
3194 | if (MI != SPCache.end()) { | |||
3195 | auto *SP = dyn_cast_or_null<llvm::DISubprogram>(MI->second); | |||
3196 | if (SP && !SP->isDefinition()) | |||
3197 | return SP; | |||
3198 | } | |||
3199 | ||||
3200 | for (auto NextFD : FD->redecls()) { | |||
3201 | auto MI = SPCache.find(NextFD->getCanonicalDecl()); | |||
3202 | if (MI != SPCache.end()) { | |||
3203 | auto *SP = dyn_cast_or_null<llvm::DISubprogram>(MI->second); | |||
3204 | if (SP && !SP->isDefinition()) | |||
3205 | return SP; | |||
3206 | } | |||
3207 | } | |||
3208 | return nullptr; | |||
3209 | } | |||
3210 | ||||
3211 | // getOrCreateFunctionType - Construct type. If it is a c++ method, include | |||
3212 | // implicit parameter "this". | |||
3213 | llvm::DISubroutineType *CGDebugInfo::getOrCreateFunctionType(const Decl *D, | |||
3214 | QualType FnType, | |||
3215 | llvm::DIFile *F) { | |||
3216 | if (!D || DebugKind <= codegenoptions::DebugLineTablesOnly) | |||
3217 | // Create fake but valid subroutine type. Otherwise -verify would fail, and | |||
3218 | // subprogram DIE will miss DW_AT_decl_file and DW_AT_decl_line fields. | |||
3219 | return DBuilder.createSubroutineType(DBuilder.getOrCreateTypeArray(None)); | |||
3220 | ||||
3221 | if (const auto *Method = dyn_cast<CXXMethodDecl>(D)) | |||
3222 | return getOrCreateMethodType(Method, F); | |||
3223 | ||||
3224 | const auto *FTy = FnType->getAs<FunctionType>(); | |||
3225 | CallingConv CC = FTy ? FTy->getCallConv() : CallingConv::CC_C; | |||
3226 | ||||
3227 | if (const auto *OMethod = dyn_cast<ObjCMethodDecl>(D)) { | |||
3228 | // Add "self" and "_cmd" | |||
3229 | SmallVector<llvm::Metadata *, 16> Elts; | |||
3230 | ||||
3231 | // First element is always return type. For 'void' functions it is NULL. | |||
3232 | QualType ResultTy = OMethod->getReturnType(); | |||
3233 | ||||
3234 | // Replace the instancetype keyword with the actual type. | |||
3235 | if (ResultTy == CGM.getContext().getObjCInstanceType()) | |||
3236 | ResultTy = CGM.getContext().getPointerType( | |||
3237 | QualType(OMethod->getClassInterface()->getTypeForDecl(), 0)); | |||
3238 | ||||
3239 | Elts.push_back(getOrCreateType(ResultTy, F)); | |||
3240 | // "self" pointer is always first argument. | |||
3241 | QualType SelfDeclTy; | |||
3242 | if (auto *SelfDecl = OMethod->getSelfDecl()) | |||
3243 | SelfDeclTy = SelfDecl->getType(); | |||
3244 | else if (auto *FPT = dyn_cast<FunctionProtoType>(FnType)) | |||
3245 | if (FPT->getNumParams() > 1) | |||
3246 | SelfDeclTy = FPT->getParamType(0); | |||
3247 | if (!SelfDeclTy.isNull()) | |||
3248 | Elts.push_back( | |||
3249 | CreateSelfType(SelfDeclTy, getOrCreateType(SelfDeclTy, F))); | |||
3250 | // "_cmd" pointer is always second argument. | |||
3251 | Elts.push_back(DBuilder.createArtificialType( | |||
3252 | getOrCreateType(CGM.getContext().getObjCSelType(), F))); | |||
3253 | // Get rest of the arguments. | |||
3254 | for (const auto *PI : OMethod->parameters()) | |||
3255 | Elts.push_back(getOrCreateType(PI->getType(), F)); | |||
3256 | // Variadic methods need a special marker at the end of the type list. | |||
3257 | if (OMethod->isVariadic()) | |||
3258 | Elts.push_back(DBuilder.createUnspecifiedParameter()); | |||
3259 | ||||
3260 | llvm::DITypeRefArray EltTypeArray = DBuilder.getOrCreateTypeArray(Elts); | |||
3261 | return DBuilder.createSubroutineType(EltTypeArray, llvm::DINode::FlagZero, | |||
3262 | getDwarfCC(CC)); | |||
3263 | } | |||
3264 | ||||
3265 | // Handle variadic function types; they need an additional | |||
3266 | // unspecified parameter. | |||
3267 | if (const auto *FD = dyn_cast<FunctionDecl>(D)) | |||
3268 | if (FD->isVariadic()) { | |||
3269 | SmallVector<llvm::Metadata *, 16> EltTys; | |||
3270 | EltTys.push_back(getOrCreateType(FD->getReturnType(), F)); | |||
3271 | if (const auto *FPT = dyn_cast<FunctionProtoType>(FnType)) | |||
3272 | for (QualType ParamType : FPT->param_types()) | |||
3273 | EltTys.push_back(getOrCreateType(ParamType, F)); | |||
3274 | EltTys.push_back(DBuilder.createUnspecifiedParameter()); | |||
3275 | llvm::DITypeRefArray EltTypeArray = DBuilder.getOrCreateTypeArray(EltTys); | |||
3276 | return DBuilder.createSubroutineType(EltTypeArray, llvm::DINode::FlagZero, | |||
3277 | getDwarfCC(CC)); | |||
3278 | } | |||
3279 | ||||
3280 | return cast<llvm::DISubroutineType>(getOrCreateType(FnType, F)); | |||
3281 | } | |||
3282 | ||||
3283 | void CGDebugInfo::EmitFunctionStart(GlobalDecl GD, SourceLocation Loc, | |||
3284 | SourceLocation ScopeLoc, QualType FnType, | |||
3285 | llvm::Function *Fn, bool CurFuncIsThunk, | |||
3286 | CGBuilderTy &Builder) { | |||
3287 | ||||
3288 | StringRef Name; | |||
3289 | StringRef LinkageName; | |||
3290 | ||||
3291 | FnBeginRegionCount.push_back(LexicalBlockStack.size()); | |||
3292 | ||||
3293 | const Decl *D = GD.getDecl(); | |||
3294 | bool HasDecl = (D != nullptr); | |||
3295 | ||||
3296 | llvm::DINode::DIFlags Flags = llvm::DINode::FlagZero; | |||
3297 | llvm::DIFile *Unit = getOrCreateFile(Loc); | |||
3298 | llvm::DIScope *FDContext = Unit; | |||
3299 | llvm::DINodeArray TParamsArray; | |||
3300 | if (!HasDecl) { | |||
3301 | // Use llvm function name. | |||
3302 | LinkageName = Fn->getName(); | |||
3303 | } else if (const auto *FD = dyn_cast<FunctionDecl>(D)) { | |||
3304 | // If there is a subprogram for this function available then use it. | |||
3305 | auto FI = SPCache.find(FD->getCanonicalDecl()); | |||
3306 | if (FI != SPCache.end()) { | |||
3307 | auto *SP = dyn_cast_or_null<llvm::DISubprogram>(FI->second); | |||
3308 | if (SP && SP->isDefinition()) { | |||
3309 | LexicalBlockStack.emplace_back(SP); | |||
3310 | RegionMap[D].reset(SP); | |||
3311 | return; | |||
3312 | } | |||
3313 | } | |||
3314 | collectFunctionDeclProps(GD, Unit, Name, LinkageName, FDContext, | |||
3315 | TParamsArray, Flags); | |||
3316 | } else if (const auto *OMD = dyn_cast<ObjCMethodDecl>(D)) { | |||
3317 | Name = getObjCMethodName(OMD); | |||
3318 | Flags |= llvm::DINode::FlagPrototyped; | |||
3319 | } else { | |||
3320 | // Use llvm function name. | |||
3321 | Name = Fn->getName(); | |||
3322 | Flags |= llvm::DINode::FlagPrototyped; | |||
3323 | } | |||
3324 | if (Name.startswith("\01")) | |||
3325 | Name = Name.substr(1); | |||
3326 | ||||
3327 | if (!HasDecl || D->isImplicit() || D->hasAttr<ArtificialAttr>()) { | |||
3328 | Flags |= llvm::DINode::FlagArtificial; | |||
3329 | // Artificial functions should not silently reuse CurLoc. | |||
3330 | CurLoc = SourceLocation(); | |||
3331 | } | |||
3332 | ||||
3333 | if (CurFuncIsThunk) | |||
3334 | Flags |= llvm::DINode::FlagThunk; | |||
3335 | ||||
3336 | unsigned LineNo = getLineNumber(Loc); | |||
3337 | unsigned ScopeLine = getLineNumber(ScopeLoc); | |||
3338 | ||||
3339 | // FIXME: The function declaration we're constructing here is mostly reusing | |||
3340 | // declarations from CXXMethodDecl and not constructing new ones for arbitrary | |||
3341 | // FunctionDecls. When/if we fix this we can have FDContext be TheCU/null for | |||
3342 | // all subprograms instead of the actual context since subprogram definitions | |||
3343 | // are emitted as CU level entities by the backend. | |||
3344 | llvm::DISubprogram *SP = DBuilder.createFunction( | |||
3345 | FDContext, Name, LinkageName, Unit, LineNo, | |||
3346 | getOrCreateFunctionType(D, FnType, Unit), Fn->hasLocalLinkage(), | |||
3347 | true /*definition*/, ScopeLine, Flags, CGM.getLangOpts().Optimize, | |||
3348 | TParamsArray.get(), getFunctionDeclaration(D)); | |||
3349 | Fn->setSubprogram(SP); | |||
3350 | // We might get here with a VarDecl in the case we're generating | |||
3351 | // code for the initialization of globals. Do not record these decls | |||
3352 | // as they will overwrite the actual VarDecl Decl in the cache. | |||
3353 | if (HasDecl && isa<FunctionDecl>(D)) | |||
3354 | DeclCache[D->getCanonicalDecl()].reset(SP); | |||
3355 | ||||
3356 | if (CGM.getCodeGenOpts().DwarfVersion >= 5) { | |||
3357 | // Starting with DWARF V5 method declarations are emitted as children of | |||
3358 | // the interface type. | |||
3359 | if (const auto *OMD = dyn_cast_or_null<ObjCMethodDecl>(D)) { | |||
3360 | const ObjCInterfaceDecl *ID = OMD->getClassInterface(); | |||
3361 | QualType QTy(ID->getTypeForDecl(), 0); | |||
3362 | auto It = TypeCache.find(QTy.getAsOpaquePtr()); | |||
3363 | if (It != TypeCache.end()) { | |||
3364 | llvm::DICompositeType *InterfaceDecl = | |||
3365 | cast<llvm::DICompositeType>(It->second); | |||
3366 | llvm::DISubprogram *FD = DBuilder.createFunction( | |||
3367 | InterfaceDecl, Name, LinkageName, Unit, LineNo, | |||
3368 | getOrCreateFunctionType(D, FnType, Unit), Fn->hasLocalLinkage(), | |||
3369 | false /*definition*/, ScopeLine, Flags, CGM.getLangOpts().Optimize, | |||
3370 | TParamsArray.get()); | |||
3371 | DBuilder.finalizeSubprogram(FD); | |||
3372 | ObjCMethodCache[ID].push_back(FD); | |||
3373 | } | |||
3374 | } | |||
3375 | } | |||
3376 | ||||
3377 | // Push the function onto the lexical block stack. | |||
3378 | LexicalBlockStack.emplace_back(SP); | |||
3379 | ||||
3380 | if (HasDecl) | |||
3381 | RegionMap[D].reset(SP); | |||
3382 | } | |||
3383 | ||||
3384 | void CGDebugInfo::EmitFunctionDecl(GlobalDecl GD, SourceLocation Loc, | |||
3385 | QualType FnType) { | |||
3386 | StringRef Name; | |||
3387 | StringRef LinkageName; | |||
3388 | ||||
3389 | const Decl *D = GD.getDecl(); | |||
3390 | if (!D) | |||
3391 | return; | |||
3392 | ||||
3393 | llvm::DINode::DIFlags Flags = llvm::DINode::FlagZero; | |||
3394 | llvm::DIFile *Unit = getOrCreateFile(Loc); | |||
3395 | llvm::DIScope *FDContext = getDeclContextDescriptor(D); | |||
3396 | llvm::DINodeArray TParamsArray; | |||
3397 | if (isa<FunctionDecl>(D)) { | |||
3398 | // If there is a DISubprogram for this function available then use it. | |||
3399 | collectFunctionDeclProps(GD, Unit, Name, LinkageName, FDContext, | |||
3400 | TParamsArray, Flags); | |||
3401 | } else if (const auto *OMD = dyn_cast<ObjCMethodDecl>(D)) { | |||
3402 | Name = getObjCMethodName(OMD); | |||
3403 | Flags |= llvm::DINode::FlagPrototyped; | |||
3404 | } else { | |||
3405 | llvm_unreachable("not a function or ObjC method")::llvm::llvm_unreachable_internal("not a function or ObjC method" , "/build/llvm-toolchain-snapshot-7~svn338205/tools/clang/lib/CodeGen/CGDebugInfo.cpp" , 3405); | |||
3406 | } | |||
3407 | if (!Name.empty() && Name[0] == '\01') | |||
3408 | Name = Name.substr(1); | |||
3409 | ||||
3410 | if (D->isImplicit()) { | |||
3411 | Flags |= llvm::DINode::FlagArtificial; | |||
3412 | // Artificial functions without a location should not silently reuse CurLoc. | |||
3413 | if (Loc.isInvalid()) | |||
3414 | CurLoc = SourceLocation(); | |||
3415 | } | |||
3416 | unsigned LineNo = getLineNumber(Loc); | |||
3417 | unsigned ScopeLine = 0; | |||
3418 | ||||
3419 | DBuilder.retainType(DBuilder.createFunction( | |||
3420 | FDContext, Name, LinkageName, Unit, LineNo, | |||
3421 | getOrCreateFunctionType(D, FnType, Unit), false /*internalLinkage*/, | |||
3422 | false /*definition*/, ScopeLine, Flags, CGM.getLangOpts().Optimize, | |||
3423 | TParamsArray.get(), getFunctionDeclaration(D))); | |||
3424 | } | |||
3425 | ||||
3426 | void CGDebugInfo::EmitInlineFunctionStart(CGBuilderTy &Builder, GlobalDecl GD) { | |||
3427 | const auto *FD = cast<FunctionDecl>(GD.getDecl()); | |||
3428 | // If there is a subprogram for this function available then use it. | |||
3429 | auto FI = SPCache.find(FD->getCanonicalDecl()); | |||
3430 | llvm::DISubprogram *SP = nullptr; | |||
3431 | if (FI != SPCache.end()) | |||
3432 | SP = dyn_cast_or_null<llvm::DISubprogram>(FI->second); | |||
3433 | if (!SP || !SP->isDefinition()) | |||
3434 | SP = getFunctionStub(GD); | |||
3435 | FnBeginRegionCount.push_back(LexicalBlockStack.size()); | |||
3436 | LexicalBlockStack.emplace_back(SP); | |||
3437 | setInlinedAt(Builder.getCurrentDebugLocation()); | |||
3438 | EmitLocation(Builder, FD->getLocation()); | |||
3439 | } | |||
3440 | ||||
3441 | void CGDebugInfo::EmitInlineFunctionEnd(CGBuilderTy &Builder) { | |||
3442 | assert(CurInlinedAt && "unbalanced inline scope stack")(static_cast <bool> (CurInlinedAt && "unbalanced inline scope stack" ) ? void (0) : __assert_fail ("CurInlinedAt && \"unbalanced inline scope stack\"" , "/build/llvm-toolchain-snapshot-7~svn338205/tools/clang/lib/CodeGen/CGDebugInfo.cpp" , 3442, __extension__ __PRETTY_FUNCTION__)); | |||
3443 | EmitFunctionEnd(Builder, nullptr); | |||
3444 | setInlinedAt(llvm::DebugLoc(CurInlinedAt).getInlinedAt()); | |||
3445 | } | |||
3446 | ||||
3447 | void CGDebugInfo::EmitLocation(CGBuilderTy &Builder, SourceLocation Loc) { | |||
3448 | // Update our current location | |||
3449 | setLocation(Loc); | |||
3450 | ||||
3451 | if (CurLoc.isInvalid() || CurLoc.isMacroID()) | |||
3452 | return; | |||
3453 | ||||
3454 | llvm::MDNode *Scope = LexicalBlockStack.back(); | |||
3455 | Builder.SetCurrentDebugLocation(llvm::DebugLoc::get( | |||
3456 | getLineNumber(CurLoc), getColumnNumber(CurLoc), Scope, CurInlinedAt)); | |||
3457 | } | |||
3458 | ||||
3459 | void CGDebugInfo::CreateLexicalBlock(SourceLocation Loc) { | |||
3460 | llvm::MDNode *Back = nullptr; | |||
3461 | if (!LexicalBlockStack.empty()) | |||
3462 | Back = LexicalBlockStack.back().get(); | |||
3463 | LexicalBlockStack.emplace_back(DBuilder.createLexicalBlock( | |||
3464 | cast<llvm::DIScope>(Back), getOrCreateFile(CurLoc), getLineNumber(CurLoc), | |||
3465 | getColumnNumber(CurLoc))); | |||
3466 | } | |||
3467 | ||||
3468 | void CGDebugInfo::AppendAddressSpaceXDeref( | |||
3469 | unsigned AddressSpace, SmallVectorImpl<int64_t> &Expr) const { | |||
3470 | Optional<unsigned> DWARFAddressSpace = | |||
3471 | CGM.getTarget().getDWARFAddressSpace(AddressSpace); | |||
3472 | if (!DWARFAddressSpace) | |||
3473 | return; | |||
3474 | ||||
3475 | Expr.push_back(llvm::dwarf::DW_OP_constu); | |||
3476 | Expr.push_back(DWARFAddressSpace.getValue()); | |||
3477 | Expr.push_back(llvm::dwarf::DW_OP_swap); | |||
3478 | Expr.push_back(llvm::dwarf::DW_OP_xderef); | |||
3479 | } | |||
3480 | ||||
3481 | void CGDebugInfo::EmitLexicalBlockStart(CGBuilderTy &Builder, | |||
3482 | SourceLocation Loc) { | |||
3483 | // Set our current location. | |||
3484 | setLocation(Loc); | |||
3485 | ||||
3486 | // Emit a line table change for the current location inside the new scope. | |||
3487 | Builder.SetCurrentDebugLocation( | |||
3488 | llvm::DebugLoc::get(getLineNumber(Loc), getColumnNumber(Loc), | |||
3489 | LexicalBlockStack.back(), CurInlinedAt)); | |||
3490 | ||||
3491 | if (DebugKind <= codegenoptions::DebugLineTablesOnly) | |||
3492 | return; | |||
3493 | ||||
3494 | // Create a new lexical block and push it on the stack. | |||
3495 | CreateLexicalBlock(Loc); | |||
3496 | } | |||
3497 | ||||
3498 | void CGDebugInfo::EmitLexicalBlockEnd(CGBuilderTy &Builder, | |||
3499 | SourceLocation Loc) { | |||
3500 | assert(!LexicalBlockStack.empty() && "Region stack mismatch, stack empty!")(static_cast <bool> (!LexicalBlockStack.empty() && "Region stack mismatch, stack empty!") ? void (0) : __assert_fail ("!LexicalBlockStack.empty() && \"Region stack mismatch, stack empty!\"" , "/build/llvm-toolchain-snapshot-7~svn338205/tools/clang/lib/CodeGen/CGDebugInfo.cpp" , 3500, __extension__ __PRETTY_FUNCTION__)); | |||
3501 | ||||
3502 | // Provide an entry in the line table for the end of the block. | |||
3503 | EmitLocation(Builder, Loc); | |||
3504 | ||||
3505 | if (DebugKind <= codegenoptions::DebugLineTablesOnly) | |||
3506 | return; | |||
3507 | ||||
3508 | LexicalBlockStack.pop_back(); | |||
3509 | } | |||
3510 | ||||
3511 | void CGDebugInfo::EmitFunctionEnd(CGBuilderTy &Builder, llvm::Function *Fn) { | |||
3512 | assert(!LexicalBlockStack.empty() && "Region stack mismatch, stack empty!")(static_cast <bool> (!LexicalBlockStack.empty() && "Region stack mismatch, stack empty!") ? void (0) : __assert_fail ("!LexicalBlockStack.empty() && \"Region stack mismatch, stack empty!\"" , "/build/llvm-toolchain-snapshot-7~svn338205/tools/clang/lib/CodeGen/CGDebugInfo.cpp" , 3512, __extension__ __PRETTY_FUNCTION__)); | |||
3513 | unsigned RCount = FnBeginRegionCount.back(); | |||
3514 | assert(RCount <= LexicalBlockStack.size() && "Region stack mismatch")(static_cast <bool> (RCount <= LexicalBlockStack.size () && "Region stack mismatch") ? void (0) : __assert_fail ("RCount <= LexicalBlockStack.size() && \"Region stack mismatch\"" , "/build/llvm-toolchain-snapshot-7~svn338205/tools/clang/lib/CodeGen/CGDebugInfo.cpp" , 3514, __extension__ __PRETTY_FUNCTION__)); | |||
3515 | ||||
3516 | // Pop all regions for this function. | |||
3517 | while (LexicalBlockStack.size() != RCount) { | |||
3518 | // Provide an entry in the line table for the end of the block. | |||
3519 | EmitLocation(Builder, CurLoc); | |||
3520 | LexicalBlockStack.pop_back(); | |||
3521 | } | |||
3522 | FnBeginRegionCount.pop_back(); | |||
3523 | ||||
3524 | if (Fn && Fn->getSubprogram()) | |||
3525 | DBuilder.finalizeSubprogram(Fn->getSubprogram()); | |||
3526 | } | |||
3527 | ||||
3528 | llvm::DIType *CGDebugInfo::EmitTypeForVarWithBlocksAttr(const VarDecl *VD, | |||
3529 | uint64_t *XOffset) { | |||
3530 | ||||
3531 | SmallVector<llvm::Metadata *, 5> EltTys; | |||
3532 | QualType FType; | |||
3533 | uint64_t FieldSize, FieldOffset; | |||
3534 | uint32_t FieldAlign; | |||
3535 | ||||
3536 | llvm::DIFile *Unit = getOrCreateFile(VD->getLocation()); | |||
3537 | QualType Type = VD->getType(); | |||
3538 | ||||
3539 | FieldOffset = 0; | |||
3540 | FType = CGM.getContext().getPointerType(CGM.getContext().VoidTy); | |||
3541 | EltTys.push_back(CreateMemberType(Unit, FType, "__isa", &FieldOffset)); | |||
3542 | EltTys.push_back(CreateMemberType(Unit, FType, "__forwarding", &FieldOffset)); | |||
3543 | FType = CGM.getContext().IntTy; | |||
3544 | EltTys.push_back(CreateMemberType(Unit, FType, "__flags", &FieldOffset)); | |||
3545 | EltTys.push_back(CreateMemberType(Unit, FType, "__size", &FieldOffset)); | |||
3546 | ||||
3547 | bool HasCopyAndDispose = CGM.getContext().BlockRequiresCopying(Type, VD); | |||
3548 | if (HasCopyAndDispose) { | |||
3549 | FType = CGM.getContext().getPointerType(CGM.getContext().VoidTy); | |||
3550 | EltTys.push_back( | |||
3551 | CreateMemberType(Unit, FType, "__copy_helper", &FieldOffset)); | |||
3552 | EltTys.push_back( | |||
3553 | CreateMemberType(Unit, FType, "__destroy_helper", &FieldOffset)); | |||
3554 | } | |||
3555 | bool HasByrefExtendedLayout; | |||
3556 | Qualifiers::ObjCLifetime Lifetime; | |||
3557 | if (CGM.getContext().getByrefLifetime(Type, Lifetime, | |||
3558 | HasByrefExtendedLayout) && | |||
3559 | HasByrefExtendedLayout) { | |||
3560 | FType = CGM.getContext().getPointerType(CGM.getContext().VoidTy); | |||
3561 | EltTys.push_back( | |||
3562 | CreateMemberType(Unit, FType, "__byref_variable_layout", &FieldOffset)); | |||
3563 | } | |||
3564 | ||||
3565 | CharUnits Align = CGM.getContext().getDeclAlign(VD); | |||
3566 | if (Align > CGM.getContext().toCharUnitsFromBits( | |||
3567 | CGM.getTarget().getPointerAlign(0))) { | |||
3568 | CharUnits FieldOffsetInBytes = | |||
3569 | CGM.getContext().toCharUnitsFromBits(FieldOffset); | |||
3570 | CharUnits AlignedOffsetInBytes = FieldOffsetInBytes.alignTo(Align); | |||
3571 | CharUnits NumPaddingBytes = AlignedOffsetInBytes - FieldOffsetInBytes; | |||
3572 | ||||
3573 | if (NumPaddingBytes.isPositive()) { | |||
3574 | llvm::APInt pad(32, NumPaddingBytes.getQuantity()); | |||
3575 | FType = CGM.getContext().getConstantArrayType(CGM.getContext().CharTy, | |||
3576 | pad, ArrayType::Normal, 0); | |||
3577 | EltTys.push_back(CreateMemberType(Unit, FType, "", &FieldOffset)); | |||
3578 | } | |||
3579 | } | |||
3580 | ||||
3581 | FType = Type; | |||
3582 | llvm::DIType *FieldTy = getOrCreateType(FType, Unit); | |||
3583 | FieldSize = CGM.getContext().getTypeSize(FType); | |||
3584 | FieldAlign = CGM.getContext().toBits(Align); | |||
3585 | ||||
3586 | *XOffset = FieldOffset; | |||
3587 | FieldTy = DBuilder.createMemberType(Unit, VD->getName(), Unit, 0, FieldSize, | |||
3588 | FieldAlign, FieldOffset, | |||
3589 | llvm::DINode::FlagZero, FieldTy); | |||
3590 | EltTys.push_back(FieldTy); | |||
3591 | FieldOffset += FieldSize; | |||
3592 | ||||
3593 | llvm::DINodeArray Elements = DBuilder.getOrCreateArray(EltTys); | |||
3594 | ||||
3595 | llvm::DINode::DIFlags Flags = llvm::DINode::FlagBlockByrefStruct; | |||
3596 | ||||
3597 | return DBuilder.createStructType(Unit, "", Unit, 0, FieldOffset, 0, Flags, | |||
3598 | nullptr, Elements); | |||
3599 | } | |||
3600 | ||||
3601 | llvm::DILocalVariable *CGDebugInfo::EmitDeclare(const VarDecl *VD, | |||
3602 | llvm::Value *Storage, | |||
3603 | llvm::Optional<unsigned> ArgNo, | |||
3604 | CGBuilderTy &Builder) { | |||
3605 | assert(DebugKind >= codegenoptions::LimitedDebugInfo)(static_cast <bool> (DebugKind >= codegenoptions::LimitedDebugInfo ) ? void (0) : __assert_fail ("DebugKind >= codegenoptions::LimitedDebugInfo" , "/build/llvm-toolchain-snapshot-7~svn338205/tools/clang/lib/CodeGen/CGDebugInfo.cpp" , 3605, __extension__ __PRETTY_FUNCTION__)); | |||
3606 | assert(!LexicalBlockStack.empty() && "Region stack mismatch, stack empty!")(static_cast <bool> (!LexicalBlockStack.empty() && "Region stack mismatch, stack empty!") ? void (0) : __assert_fail ("!LexicalBlockStack.empty() && \"Region stack mismatch, stack empty!\"" , "/build/llvm-toolchain-snapshot-7~svn338205/tools/clang/lib/CodeGen/CGDebugInfo.cpp" , 3606, __extension__ __PRETTY_FUNCTION__)); | |||
3607 | if (VD->hasAttr<NoDebugAttr>()) | |||
3608 | return nullptr; | |||
3609 | ||||
3610 | bool Unwritten = | |||
3611 | VD->isImplicit() || (isa<Decl>(VD->getDeclContext()) && | |||
3612 | cast<Decl>(VD->getDeclContext())->isImplicit()); | |||
3613 | llvm::DIFile *Unit = nullptr; | |||
3614 | if (!Unwritten) | |||
3615 | Unit = getOrCreateFile(VD->getLocation()); | |||
3616 | llvm::DIType *Ty; | |||
3617 | uint64_t XOffset = 0; | |||
3618 | if (VD->hasAttr<BlocksAttr>()) | |||
3619 | Ty = EmitTypeForVarWithBlocksAttr(VD, &XOffset); | |||
3620 | else | |||
3621 | Ty = getOrCreateType(VD->getType(), Unit); | |||
3622 | ||||
3623 | // If there is no debug info for this type then do not emit debug info | |||
3624 | // for this variable. | |||
3625 | if (!Ty) | |||
3626 | return nullptr; | |||
3627 | ||||
3628 | // Get location information. | |||
3629 | unsigned Line = 0; | |||
3630 | unsigned Column = 0; | |||
3631 | if (!Unwritten) { | |||
3632 | Line = getLineNumber(VD->getLocation()); | |||
3633 | Column = getColumnNumber(VD->getLocation()); | |||
3634 | } | |||
3635 | SmallVector<int64_t, 13> Expr; | |||
3636 | llvm::DINode::DIFlags Flags = llvm::DINode::FlagZero; | |||
3637 | if (VD->isImplicit()) | |||
3638 | Flags |= llvm::DINode::FlagArtificial; | |||
3639 | ||||
3640 | auto Align = getDeclAlignIfRequired(VD, CGM.getContext()); | |||
3641 | ||||
3642 | unsigned AddressSpace = CGM.getContext().getTargetAddressSpace(VD->getType()); | |||
3643 | AppendAddressSpaceXDeref(AddressSpace, Expr); | |||
3644 | ||||
3645 | // If this is implicit parameter of CXXThis or ObjCSelf kind, then give it an | |||
3646 | // object pointer flag. | |||
3647 | if (const auto *IPD = dyn_cast<ImplicitParamDecl>(VD)) { | |||
3648 | if (IPD->getParameterKind() == ImplicitParamDecl::CXXThis || | |||
3649 | IPD->getParameterKind() == ImplicitParamDecl::ObjCSelf) | |||
3650 | Flags |= llvm::DINode::FlagObjectPointer; | |||
3651 | } | |||
3652 | ||||
3653 | // Note: Older versions of clang used to emit byval references with an extra | |||
3654 | // DW_OP_deref, because they referenced the IR arg directly instead of | |||
3655 | // referencing an alloca. Newer versions of LLVM don't treat allocas | |||
3656 | // differently from other function arguments when used in a dbg.declare. | |||
3657 | auto *Scope = cast<llvm::DIScope>(LexicalBlockStack.back()); | |||
3658 | StringRef Name = VD->getName(); | |||
3659 | if (!Name.empty()) { | |||
3660 | if (VD->hasAttr<BlocksAttr>()) { | |||
3661 | // Here, we need an offset *into* the alloca. | |||
3662 | CharUnits offset = CharUnits::fromQuantity(32); | |||
3663 | Expr.push_back(llvm::dwarf::DW_OP_plus_uconst); | |||
3664 | // offset of __forwarding field | |||
3665 | offset = CGM.getContext().toCharUnitsFromBits( | |||
3666 | CGM.getTarget().getPointerWidth(0)); | |||
3667 | Expr.push_back(offset.getQuantity()); | |||
3668 | Expr.push_back(llvm::dwarf::DW_OP_deref); | |||
3669 | Expr.push_back(llvm::dwarf::DW_OP_plus_uconst); | |||
3670 | // offset of x field | |||
3671 | offset = CGM.getContext().toCharUnitsFromBits(XOffset); | |||
3672 | Expr.push_back(offset.getQuantity()); | |||
3673 | } | |||
3674 | } else if (const auto *RT = dyn_cast<RecordType>(VD->getType())) { | |||
3675 | // If VD is an anonymous union then Storage represents value for | |||
3676 | // all union fields. | |||
3677 | const RecordDecl *RD = RT->getDecl(); | |||
3678 | if (RD->isUnion() && RD->isAnonymousStructOrUnion()) { | |||
3679 | // GDB has trouble finding local variables in anonymous unions, so we emit | |||
3680 | // artificial local variables for each of the members. | |||
3681 | // | |||
3682 | // FIXME: Remove this code as soon as GDB supports this. | |||
3683 | // The debug info verifier in LLVM operates based on the assumption that a | |||
3684 | // variable has the same size as its storage and we had to disable the | |||
3685 | // check for artificial variables. | |||
3686 | for (const auto *Field : RD->fields()) { | |||
3687 | llvm::DIType *FieldTy = getOrCreateType(Field->getType(), Unit); | |||
3688 | StringRef FieldName = Field->getName(); | |||
3689 | ||||
3690 | // Ignore unnamed fields. Do not ignore unnamed records. | |||
3691 | if (FieldName.empty() && !isa<RecordType>(Field->getType())) | |||
3692 | continue; | |||
3693 | ||||
3694 | // Use VarDecl's Tag, Scope and Line number. | |||
3695 | auto FieldAlign = getDeclAlignIfRequired(Field, CGM.getContext()); | |||
3696 | auto *D = DBuilder.createAutoVariable( | |||
3697 | Scope, FieldName, Unit, Line, FieldTy, CGM.getLangOpts().Optimize, | |||
3698 | Flags | llvm::DINode::FlagArtificial, FieldAlign); | |||
3699 | ||||
3700 | // Insert an llvm.dbg.declare into the current block. | |||
3701 | DBuilder.insertDeclare( | |||
3702 | Storage, D, DBuilder.createExpression(Expr), | |||
3703 | llvm::DebugLoc::get(Line, Column, Scope, CurInlinedAt), | |||
3704 | Builder.GetInsertBlock()); | |||
3705 | } | |||
3706 | } | |||
3707 | } | |||
3708 | ||||
3709 | // Create the descriptor for the variable. | |||
3710 | auto *D = ArgNo ? DBuilder.createParameterVariable( | |||
3711 | Scope, Name, *ArgNo, Unit, Line, Ty, | |||
3712 | CGM.getLangOpts().Optimize, Flags) | |||
3713 | : DBuilder.createAutoVariable(Scope, Name, Unit, Line, Ty, | |||
3714 | CGM.getLangOpts().Optimize, | |||
3715 | Flags, Align); | |||
3716 | ||||
3717 | // Insert an llvm.dbg.declare into the current block. | |||
3718 | DBuilder.insertDeclare(Storage, D, DBuilder.createExpression(Expr), | |||
3719 | llvm::DebugLoc::get(Line, Column, Scope, CurInlinedAt), | |||
3720 | Builder.GetInsertBlock()); | |||
3721 | ||||
3722 | return D; | |||
3723 | } | |||
3724 | ||||
3725 | llvm::DILocalVariable * | |||
3726 | CGDebugInfo::EmitDeclareOfAutoVariable(const VarDecl *VD, llvm::Value *Storage, | |||
3727 | CGBuilderTy &Builder) { | |||
3728 | assert(DebugKind >= codegenoptions::LimitedDebugInfo)(static_cast <bool> (DebugKind >= codegenoptions::LimitedDebugInfo ) ? void (0) : __assert_fail ("DebugKind >= codegenoptions::LimitedDebugInfo" , "/build/llvm-toolchain-snapshot-7~svn338205/tools/clang/lib/CodeGen/CGDebugInfo.cpp" , 3728, __extension__ __PRETTY_FUNCTION__)); | |||
3729 | return EmitDeclare(VD, Storage, llvm::None, Builder); | |||
3730 | } | |||
3731 | ||||
3732 | llvm::DIType *CGDebugInfo::CreateSelfType(const QualType &QualTy, | |||
3733 | llvm::DIType *Ty) { | |||
3734 | llvm::DIType *CachedTy = getTypeOrNull(QualTy); | |||
3735 | if (CachedTy) | |||
3736 | Ty = CachedTy; | |||
3737 | return DBuilder.createObjectPointerType(Ty); | |||
3738 | } | |||
3739 | ||||
3740 | void CGDebugInfo::EmitDeclareOfBlockDeclRefVariable( | |||
3741 | const VarDecl *VD, llvm::Value *Storage, CGBuilderTy &Builder, | |||
3742 | const CGBlockInfo &blockInfo, llvm::Instruction *InsertPoint) { | |||
3743 | assert(DebugKind >= codegenoptions::LimitedDebugInfo)(static_cast <bool> (DebugKind >= codegenoptions::LimitedDebugInfo ) ? void (0) : __assert_fail ("DebugKind >= codegenoptions::LimitedDebugInfo" , "/build/llvm-toolchain-snapshot-7~svn338205/tools/clang/lib/CodeGen/CGDebugInfo.cpp" , 3743, __extension__ __PRETTY_FUNCTION__)); | |||
3744 | assert(!LexicalBlockStack.empty() && "Region stack mismatch, stack empty!")(static_cast <bool> (!LexicalBlockStack.empty() && "Region stack mismatch, stack empty!") ? void (0) : __assert_fail ("!LexicalBlockStack.empty() && \"Region stack mismatch, stack empty!\"" , "/build/llvm-toolchain-snapshot-7~svn338205/tools/clang/lib/CodeGen/CGDebugInfo.cpp" , 3744, __extension__ __PRETTY_FUNCTION__)); | |||
3745 | ||||
3746 | if (Builder.GetInsertBlock() == nullptr) | |||
3747 | return; | |||
3748 | if (VD->hasAttr<NoDebugAttr>()) | |||
3749 | return; | |||
3750 | ||||
3751 | bool isByRef = VD->hasAttr<BlocksAttr>(); | |||
3752 | ||||
3753 | uint64_t XOffset = 0; | |||
3754 | llvm::DIFile *Unit = getOrCreateFile(VD->getLocation()); | |||
3755 | llvm::DIType *Ty; | |||
3756 | if (isByRef) | |||
3757 | Ty = EmitTypeForVarWithBlocksAttr(VD, &XOffset); | |||
3758 | else | |||
3759 | Ty = getOrCreateType(VD->getType(), Unit); | |||
3760 | ||||
3761 | // Self is passed along as an implicit non-arg variable in a | |||
3762 | // block. Mark it as the object pointer. | |||
3763 | if (const auto *IPD = dyn_cast<ImplicitParamDecl>(VD)) | |||
3764 | if (IPD->getParameterKind() == ImplicitParamDecl::ObjCSelf) | |||
3765 | Ty = CreateSelfType(VD->getType(), Ty); | |||
3766 | ||||
3767 | // Get location information. | |||
3768 | unsigned Line = getLineNumber(VD->getLocation()); | |||
3769 | unsigned Column = getColumnNumber(VD->getLocation()); | |||
3770 | ||||
3771 | const llvm::DataLayout &target = CGM.getDataLayout(); | |||
3772 | ||||
3773 | CharUnits offset = CharUnits::fromQuantity( | |||
3774 | target.getStructLayout(blockInfo.StructureType) | |||
3775 | ->getElementOffset(blockInfo.getCapture(VD).getIndex())); | |||
3776 | ||||
3777 | SmallVector<int64_t, 9> addr; | |||
3778 | addr.push_back(llvm::dwarf::DW_OP_deref); | |||
3779 | addr.push_back(llvm::dwarf::DW_OP_plus_uconst); | |||
3780 | addr.push_back(offset.getQuantity()); | |||
3781 | if (isByRef) { | |||
3782 | addr.push_back(llvm::dwarf::DW_OP_deref); | |||
3783 | addr.push_back(llvm::dwarf::DW_OP_plus_uconst); | |||
3784 | // offset of __forwarding field | |||
3785 | offset = | |||
3786 | CGM.getContext().toCharUnitsFromBits(target.getPointerSizeInBits(0)); | |||
3787 | addr.push_back(offset.getQuantity()); | |||
3788 | addr.push_back(llvm::dwarf::DW_OP_deref); | |||
3789 | addr.push_back(llvm::dwarf::DW_OP_plus_uconst); | |||
3790 | // offset of x field | |||
3791 | offset = CGM.getContext().toCharUnitsFromBits(XOffset); | |||
3792 | addr.push_back(offset.getQuantity()); | |||
3793 | } | |||
3794 | ||||
3795 | // Create the descriptor for the variable. | |||
3796 | auto Align = getDeclAlignIfRequired(VD, CGM.getContext()); | |||
3797 | auto *D = DBuilder.createAutoVariable( | |||
3798 | cast<llvm::DILocalScope>(LexicalBlockStack.back()), VD->getName(), Unit, | |||
3799 | Line, Ty, false, llvm::DINode::FlagZero, Align); | |||
3800 | ||||
3801 | // Insert an llvm.dbg.declare into the current block. | |||
3802 | auto DL = | |||
3803 | llvm::DebugLoc::get(Line, Column, LexicalBlockStack.back(), CurInlinedAt); | |||
3804 | auto *Expr = DBuilder.createExpression(addr); | |||
3805 | if (InsertPoint) | |||
3806 | DBuilder.insertDeclare(Storage, D, Expr, DL, InsertPoint); | |||
3807 | else | |||
3808 | DBuilder.insertDeclare(Storage, D, Expr, DL, Builder.GetInsertBlock()); | |||
3809 | } | |||
3810 | ||||
3811 | void CGDebugInfo::EmitDeclareOfArgVariable(const VarDecl *VD, llvm::Value *AI, | |||
3812 | unsigned ArgNo, | |||
3813 | CGBuilderTy &Builder) { | |||
3814 | assert(DebugKind >= codegenoptions::LimitedDebugInfo)(static_cast <bool> (DebugKind >= codegenoptions::LimitedDebugInfo ) ? void (0) : __assert_fail ("DebugKind >= codegenoptions::LimitedDebugInfo" , "/build/llvm-toolchain-snapshot-7~svn338205/tools/clang/lib/CodeGen/CGDebugInfo.cpp" , 3814, __extension__ __PRETTY_FUNCTION__)); | |||
3815 | EmitDeclare(VD, AI, ArgNo, Builder); | |||
3816 | } | |||
3817 | ||||
3818 | namespace { | |||
3819 | struct BlockLayoutChunk { | |||
3820 | uint64_t OffsetInBits; | |||
3821 | const BlockDecl::Capture *Capture; | |||
3822 | }; | |||
3823 | bool operator<(const BlockLayoutChunk &l, const BlockLayoutChunk &r) { | |||
3824 | return l.OffsetInBits < r.OffsetInBits; | |||
3825 | } | |||
3826 | } // namespace | |||
3827 | ||||
3828 | void CGDebugInfo::EmitDeclareOfBlockLiteralArgVariable(const CGBlockInfo &block, | |||
3829 | StringRef Name, | |||
3830 | unsigned ArgNo, | |||
3831 | llvm::AllocaInst *Alloca, | |||
3832 | CGBuilderTy &Builder) { | |||
3833 | assert(DebugKind >= codegenoptions::LimitedDebugInfo)(static_cast <bool> (DebugKind >= codegenoptions::LimitedDebugInfo ) ? void (0) : __assert_fail ("DebugKind >= codegenoptions::LimitedDebugInfo" , "/build/llvm-toolchain-snapshot-7~svn338205/tools/clang/lib/CodeGen/CGDebugInfo.cpp" , 3833, __extension__ __PRETTY_FUNCTION__)); | |||
3834 | ASTContext &C = CGM.getContext(); | |||
3835 | const BlockDecl *blockDecl = block.getBlockDecl(); | |||
3836 | ||||
3837 | // Collect some general information about the block's location. | |||
3838 | SourceLocation loc = blockDecl->getCaretLocation(); | |||
3839 | llvm::DIFile *tunit = getOrCreateFile(loc); | |||
3840 | unsigned line = getLineNumber(loc); | |||
3841 | unsigned column = getColumnNumber(loc); | |||
3842 | ||||
3843 | // Build the debug-info type for the block literal. | |||
3844 | getDeclContextDescriptor(blockDecl); | |||
3845 | ||||
3846 | const llvm::StructLayout *blockLayout = | |||
3847 | CGM.getDataLayout().getStructLayout(block.StructureType); | |||
3848 | ||||
3849 | SmallVector<llvm::Metadata *, 16> fields; | |||
3850 | fields.push_back(createFieldType("__isa", C.VoidPtrTy, loc, AS_public, | |||
3851 | blockLayout->getElementOffsetInBits(0), | |||
3852 | tunit, tunit)); | |||
3853 | fields.push_back(createFieldType("__flags", C.IntTy, loc, AS_public, | |||
3854 | blockLayout->getElementOffsetInBits(1), | |||
3855 | tunit, tunit)); | |||
3856 | fields.push_back(createFieldType("__reserved", C.IntTy, loc, AS_public, | |||
3857 | blockLayout->getElementOffsetInBits(2), | |||
3858 | tunit, tunit)); | |||
3859 | auto *FnTy = block.getBlockExpr()->getFunctionType(); | |||
3860 | auto FnPtrType = CGM.getContext().getPointerType(FnTy->desugar()); | |||
3861 | fields.push_back(createFieldType("__FuncPtr", FnPtrType, loc, AS_public, | |||
3862 | blockLayout->getElementOffsetInBits(3), | |||
3863 | tunit, tunit)); | |||
3864 | fields.push_back(createFieldType( | |||
3865 | "__descriptor", | |||
3866 | C.getPointerType(block.NeedsCopyDispose | |||
3867 | ? C.getBlockDescriptorExtendedType() | |||
3868 | : C.getBlockDescriptorType()), | |||
3869 | loc, AS_public, blockLayout->getElementOffsetInBits(4), tunit, tunit)); | |||
3870 | ||||
3871 | // We want to sort the captures by offset, not because DWARF | |||
3872 | // requires this, but because we're paranoid about debuggers. | |||
3873 | SmallVector<BlockLayoutChunk, 8> chunks; | |||
3874 | ||||
3875 | // 'this' capture. | |||
3876 | if (blockDecl->capturesCXXThis()) { | |||
3877 | BlockLayoutChunk chunk; | |||
3878 | chunk.OffsetInBits = | |||
3879 | blockLayout->getElementOffsetInBits(block.CXXThisIndex); | |||
3880 | chunk.Capture = nullptr; | |||
3881 | chunks.push_back(chunk); | |||
3882 | } | |||
3883 | ||||
3884 | // Variable captures. | |||
3885 | for (const auto &capture : blockDecl->captures()) { | |||
3886 | const VarDecl *variable = capture.getVariable(); | |||
3887 | const CGBlockInfo::Capture &captureInfo = block.getCapture(variable); | |||
3888 | ||||
3889 | // Ignore constant captures. | |||
3890 | if (captureInfo.isConstant()) | |||
3891 | continue; | |||
3892 | ||||
3893 | BlockLayoutChunk chunk; | |||
3894 | chunk.OffsetInBits = | |||
3895 | blockLayout->getElementOffsetInBits(captureInfo.getIndex()); | |||
3896 | chunk.Capture = &capture; | |||
3897 | chunks.push_back(chunk); | |||
3898 | } | |||
3899 | ||||
3900 | // Sort by offset. | |||
3901 | llvm::array_pod_sort(chunks.begin(), chunks.end()); | |||
3902 | ||||
3903 | for (const BlockLayoutChunk &Chunk : chunks) { | |||
3904 | uint64_t offsetInBits = Chunk.OffsetInBits; | |||
3905 | const BlockDecl::Capture *capture = Chunk.Capture; | |||
3906 | ||||
3907 | // If we have a null capture, this must be the C++ 'this' capture. | |||
3908 | if (!capture) { | |||
3909 | QualType type; | |||
3910 | if (auto *Method = | |||
3911 | cast_or_null<CXXMethodDecl>(blockDecl->getNonClosureContext())) | |||
3912 | type = Method->getThisType(C); | |||
3913 | else if (auto *RDecl = dyn_cast<CXXRecordDecl>(blockDecl->getParent())) | |||
3914 | type = QualType(RDecl->getTypeForDecl(), 0); | |||
3915 | else | |||
3916 | llvm_unreachable("unexpected block declcontext")::llvm::llvm_unreachable_internal("unexpected block declcontext" , "/build/llvm-toolchain-snapshot-7~svn338205/tools/clang/lib/CodeGen/CGDebugInfo.cpp" , 3916); | |||
3917 | ||||
3918 | fields.push_back(createFieldType("this", type, loc, AS_public, | |||
3919 | offsetInBits, tunit, tunit)); | |||
3920 | continue; | |||
3921 | } | |||
3922 | ||||
3923 | const VarDecl *variable = capture->getVariable(); | |||
3924 | StringRef name = variable->getName(); | |||
3925 | ||||
3926 | llvm::DIType *fieldType; | |||
3927 | if (capture->isByRef()) { | |||
3928 | TypeInfo PtrInfo = C.getTypeInfo(C.VoidPtrTy); | |||
3929 | auto Align = PtrInfo.AlignIsRequired ? PtrInfo.Align : 0; | |||
3930 | ||||
3931 | // FIXME: this creates a second copy of this type! | |||
3932 | uint64_t xoffset; | |||
3933 | fieldType = EmitTypeForVarWithBlocksAttr(variable, &xoffset); | |||
3934 | fieldType = DBuilder.createPointerType(fieldType, PtrInfo.Width); | |||
3935 | fieldType = DBuilder.createMemberType(tunit, name, tunit, line, | |||
3936 | PtrInfo.Width, Align, offsetInBits, | |||
3937 | llvm::DINode::FlagZero, fieldType); | |||
3938 | } else { | |||
3939 | auto Align = getDeclAlignIfRequired(variable, CGM.getContext()); | |||
3940 | fieldType = createFieldType(name, variable->getType(), loc, AS_public, | |||
3941 | offsetInBits, Align, tunit, tunit); | |||
3942 | } | |||
3943 | fields.push_back(fieldType); | |||
3944 | } | |||
3945 | ||||
3946 | SmallString<36> typeName; | |||
3947 | llvm::raw_svector_ostream(typeName) | |||
3948 | << "__block_literal_" << CGM.getUniqueBlockCount(); | |||
3949 | ||||
3950 | llvm::DINodeArray fieldsArray = DBuilder.getOrCreateArray(fields); | |||
3951 | ||||
3952 | llvm::DIType *type = | |||
3953 | DBuilder.createStructType(tunit, typeName.str(), tunit, line, | |||
3954 | CGM.getContext().toBits(block.BlockSize), 0, | |||
3955 | llvm::DINode::FlagZero, nullptr, fieldsArray); | |||
3956 | type = DBuilder.createPointerType(type, CGM.PointerWidthInBits); | |||
3957 | ||||
3958 | // Get overall information about the block. | |||
3959 | llvm::DINode::DIFlags flags = llvm::DINode::FlagArtificial; | |||
3960 | auto *scope = cast<llvm::DILocalScope>(LexicalBlockStack.back()); | |||
3961 | ||||
3962 | // Create the descriptor for the parameter. | |||
3963 | auto *debugVar = DBuilder.createParameterVariable( | |||
3964 | scope, Name, ArgNo, tunit, line, type, CGM.getLangOpts().Optimize, flags); | |||
3965 | ||||
3966 | // Insert an llvm.dbg.declare into the current block. | |||
3967 | DBuilder.insertDeclare(Alloca, debugVar, DBuilder.createExpression(), | |||
3968 | llvm::DebugLoc::get(line, column, scope, CurInlinedAt), | |||
3969 | Builder.GetInsertBlock()); | |||
3970 | } | |||
3971 | ||||
3972 | llvm::DIDerivedType * | |||
3973 | CGDebugInfo::getOrCreateStaticDataMemberDeclarationOrNull(const VarDecl *D) { | |||
3974 | if (!D->isStaticDataMember()) | |||
3975 | return nullptr; | |||
3976 | ||||
3977 | auto MI = StaticDataMemberCache.find(D->getCanonicalDecl()); | |||
3978 | if (MI != StaticDataMemberCache.end()) { | |||
3979 | assert(MI->second && "Static data member declaration should still exist")(static_cast <bool> (MI->second && "Static data member declaration should still exist" ) ? void (0) : __assert_fail ("MI->second && \"Static data member declaration should still exist\"" , "/build/llvm-toolchain-snapshot-7~svn338205/tools/clang/lib/CodeGen/CGDebugInfo.cpp" , 3979, __extension__ __PRETTY_FUNCTION__)); | |||
3980 | return MI->second; | |||
3981 | } | |||
3982 | ||||
3983 | // If the member wasn't found in the cache, lazily construct and add it to the | |||
3984 | // type (used when a limited form of the type is emitted). | |||
3985 | auto DC = D->getDeclContext(); | |||
3986 | auto *Ctxt = cast<llvm::DICompositeType>(getDeclContextDescriptor(D)); | |||
3987 | return CreateRecordStaticField(D, Ctxt, cast<RecordDecl>(DC)); | |||
3988 | } | |||
3989 | ||||
3990 | llvm::DIGlobalVariableExpression *CGDebugInfo::CollectAnonRecordDecls( | |||
3991 | const RecordDecl *RD, llvm::DIFile *Unit, unsigned LineNo, | |||
3992 | StringRef LinkageName, llvm::GlobalVariable *Var, llvm::DIScope *DContext) { | |||
3993 | llvm::DIGlobalVariableExpression *GVE = nullptr; | |||
3994 | ||||
3995 | for (const auto *Field : RD->fields()) { | |||
3996 | llvm::DIType *FieldTy = getOrCreateType(Field->getType(), Unit); | |||
3997 | StringRef FieldName = Field->getName(); | |||
3998 | ||||
3999 | // Ignore unnamed fields, but recurse into anonymous records. | |||
4000 | if (FieldName.empty()) { | |||
4001 | if (const auto *RT = dyn_cast<RecordType>(Field->getType())) | |||
4002 | GVE = CollectAnonRecordDecls(RT->getDecl(), Unit, LineNo, LinkageName, | |||
4003 | Var, DContext); | |||
4004 | continue; | |||
4005 | } | |||
4006 | // Use VarDecl's Tag, Scope and Line number. | |||
4007 | GVE = DBuilder.createGlobalVariableExpression( | |||
4008 | DContext, FieldName, LinkageName, Unit, LineNo, FieldTy, | |||
4009 | Var->hasLocalLinkage()); | |||
4010 | Var->addDebugInfo(GVE); | |||
4011 | } | |||
4012 | return GVE; | |||
4013 | } | |||
4014 | ||||
4015 | void CGDebugInfo::EmitGlobalVariable(llvm::GlobalVariable *Var, | |||
4016 | const VarDecl *D) { | |||
4017 | assert(DebugKind >= codegenoptions::LimitedDebugInfo)(static_cast <bool> (DebugKind >= codegenoptions::LimitedDebugInfo ) ? void (0) : __assert_fail ("DebugKind >= codegenoptions::LimitedDebugInfo" , "/build/llvm-toolchain-snapshot-7~svn338205/tools/clang/lib/CodeGen/CGDebugInfo.cpp" , 4017, __extension__ __PRETTY_FUNCTION__)); | |||
4018 | if (D->hasAttr<NoDebugAttr>()) | |||
4019 | return; | |||
4020 | ||||
4021 | // If we already created a DIGlobalVariable for this declaration, just attach | |||
4022 | // it to the llvm::GlobalVariable. | |||
4023 | auto Cached = DeclCache.find(D->getCanonicalDecl()); | |||
4024 | if (Cached != DeclCache.end()) | |||
4025 | return Var->addDebugInfo( | |||
4026 | cast<llvm::DIGlobalVariableExpression>(Cached->second)); | |||
4027 | ||||
4028 | // Create global variable debug descriptor. | |||
4029 | llvm::DIFile *Unit = nullptr; | |||
4030 | llvm::DIScope *DContext = nullptr; | |||
4031 | unsigned LineNo; | |||
4032 | StringRef DeclName, LinkageName; | |||
4033 | QualType T; | |||
4034 | collectVarDeclProps(D, Unit, LineNo, T, DeclName, LinkageName, DContext); | |||
4035 | ||||
4036 | // Attempt to store one global variable for the declaration - even if we | |||
4037 | // emit a lot of fields. | |||
4038 | llvm::DIGlobalVariableExpression *GVE = nullptr; | |||
4039 | ||||
4040 | // If this is an anonymous union then we'll want to emit a global | |||
4041 | // variable for each member of the anonymous union so that it's possible | |||
4042 | // to find the name of any field in the union. | |||
4043 | if (T->isUnionType() && DeclName.empty()) { | |||
4044 | const RecordDecl *RD = T->castAs<RecordType>()->getDecl(); | |||
4045 | assert(RD->isAnonymousStructOrUnion() &&(static_cast <bool> (RD->isAnonymousStructOrUnion() && "unnamed non-anonymous struct or union?") ? void (0) : __assert_fail ("RD->isAnonymousStructOrUnion() && \"unnamed non-anonymous struct or union?\"" , "/build/llvm-toolchain-snapshot-7~svn338205/tools/clang/lib/CodeGen/CGDebugInfo.cpp" , 4046, __extension__ __PRETTY_FUNCTION__)) | |||
4046 | "unnamed non-anonymous struct or union?")(static_cast <bool> (RD->isAnonymousStructOrUnion() && "unnamed non-anonymous struct or union?") ? void (0) : __assert_fail ("RD->isAnonymousStructOrUnion() && \"unnamed non-anonymous struct or union?\"" , "/build/llvm-toolchain-snapshot-7~svn338205/tools/clang/lib/CodeGen/CGDebugInfo.cpp" , 4046, __extension__ __PRETTY_FUNCTION__)); | |||
4047 | GVE = CollectAnonRecordDecls(RD, Unit, LineNo, LinkageName, Var, DContext); | |||
4048 | } else { | |||
4049 | auto Align = getDeclAlignIfRequired(D, CGM.getContext()); | |||
4050 | ||||
4051 | SmallVector<int64_t, 4> Expr; | |||
4052 | unsigned AddressSpace = | |||
4053 | CGM.getContext().getTargetAddressSpace(D->getType()); | |||
4054 | AppendAddressSpaceXDeref(AddressSpace, Expr); | |||
4055 | ||||
4056 | GVE = DBuilder.createGlobalVariableExpression( | |||
4057 | DContext, DeclName, LinkageName, Unit, LineNo, getOrCreateType(T, Unit), | |||
4058 | Var->hasLocalLinkage(), | |||
4059 | Expr.empty() ? nullptr : DBuilder.createExpression(Expr), | |||
4060 | getOrCreateStaticDataMemberDeclarationOrNull(D), Align); | |||
4061 | Var->addDebugInfo(GVE); | |||
4062 | } | |||
4063 | DeclCache[D->getCanonicalDecl()].reset(GVE); | |||
4064 | } | |||
4065 | ||||
4066 | void CGDebugInfo::EmitGlobalVariable(const ValueDecl *VD, const APValue &Init) { | |||
4067 | assert(DebugKind >= codegenoptions::LimitedDebugInfo)(static_cast <bool> (DebugKind >= codegenoptions::LimitedDebugInfo ) ? void (0) : __assert_fail ("DebugKind >= codegenoptions::LimitedDebugInfo" , "/build/llvm-toolchain-snapshot-7~svn338205/tools/clang/lib/CodeGen/CGDebugInfo.cpp" , 4067, __extension__ __PRETTY_FUNCTION__)); | |||
4068 | if (VD->hasAttr<NoDebugAttr>()) | |||
4069 | return; | |||
4070 | auto Align = getDeclAlignIfRequired(VD, CGM.getContext()); | |||
4071 | // Create the descriptor for the variable. | |||
4072 | llvm::DIFile *Unit = getOrCreateFile(VD->getLocation()); | |||
4073 | StringRef Name = VD->getName(); | |||
4074 | llvm::DIType *Ty = getOrCreateType(VD->getType(), Unit); | |||
4075 | if (const auto *ECD = dyn_cast<EnumConstantDecl>(VD)) { | |||
4076 | const auto *ED = cast<EnumDecl>(ECD->getDeclContext()); | |||
4077 | assert(isa<EnumType>(ED->getTypeForDecl()) && "Enum without EnumType?")(static_cast <bool> (isa<EnumType>(ED->getTypeForDecl ()) && "Enum without EnumType?") ? void (0) : __assert_fail ("isa<EnumType>(ED->getTypeForDecl()) && \"Enum without EnumType?\"" , "/build/llvm-toolchain-snapshot-7~svn338205/tools/clang/lib/CodeGen/CGDebugInfo.cpp" , 4077, __extension__ __PRETTY_FUNCTION__)); | |||
4078 | Ty = getOrCreateType(QualType(ED->getTypeForDecl(), 0), Unit); | |||
4079 | } | |||
4080 | // Do not use global variables for enums. | |||
4081 | // | |||
4082 | // FIXME: why not? | |||
4083 | if (Ty->getTag() == llvm::dwarf::DW_TAG_enumeration_type) | |||
4084 | return; | |||
4085 | // Do not emit separate definitions for function local const/statics. | |||
4086 | if (isa<FunctionDecl>(VD->getDeclContext())) | |||
4087 | return; | |||
4088 | VD = cast<ValueDecl>(VD->getCanonicalDecl()); | |||
4089 | auto *VarD = cast<VarDecl>(VD); | |||
4090 | if (VarD->isStaticDataMember()) { | |||
4091 | auto *RD = cast<RecordDecl>(VarD->getDeclContext()); | |||
4092 | getDeclContextDescriptor(VarD); | |||
4093 | // Ensure that the type is retained even though it's otherwise unreferenced. | |||
4094 | // | |||
4095 | // FIXME: This is probably unnecessary, since Ty should reference RD | |||
4096 | // through its scope. | |||
4097 | RetainedTypes.push_back( | |||
4098 | CGM.getContext().getRecordType(RD).getAsOpaquePtr()); | |||
4099 | return; | |||
4100 | } | |||
4101 | ||||
4102 | llvm::DIScope *DContext = getDeclContextDescriptor(VD); | |||
4103 | ||||
4104 | auto &GV = DeclCache[VD]; | |||
4105 | if (GV) | |||
4106 | return; | |||
4107 | llvm::DIExpression *InitExpr = nullptr; | |||
4108 | if (CGM.getContext().getTypeSize(VD->getType()) <= 64) { | |||
4109 | // FIXME: Add a representation for integer constants wider than 64 bits. | |||
4110 | if (Init.isInt()) | |||
4111 | InitExpr = | |||
4112 | DBuilder.createConstantValueExpression(Init.getInt().getExtValue()); | |||
4113 | else if (Init.isFloat()) | |||
4114 | InitExpr = DBuilder.createConstantValueExpression( | |||
4115 | Init.getFloat().bitcastToAPInt().getZExtValue()); | |||
4116 | } | |||
4117 | GV.reset(DBuilder.createGlobalVariableExpression( | |||
4118 | DContext, Name, StringRef(), Unit, getLineNumber(VD->getLocation()), Ty, | |||
4119 | true, InitExpr, getOrCreateStaticDataMemberDeclarationOrNull(VarD), | |||
4120 | Align)); | |||
4121 | } | |||
4122 | ||||
4123 | llvm::DIScope *CGDebugInfo::getCurrentContextDescriptor(const Decl *D) { | |||
4124 | if (!LexicalBlockStack.empty()) | |||
4125 | return LexicalBlockStack.back(); | |||
4126 | llvm::DIScope *Mod = getParentModuleOrNull(D); | |||
4127 | return getContextDescriptor(D, Mod ? Mod : TheCU); | |||
4128 | } | |||
4129 | ||||
4130 | void CGDebugInfo::EmitUsingDirective(const UsingDirectiveDecl &UD) { | |||
4131 | if (CGM.getCodeGenOpts().getDebugInfo() < codegenoptions::LimitedDebugInfo) | |||
4132 | return; | |||
4133 | const NamespaceDecl *NSDecl = UD.getNominatedNamespace(); | |||
4134 | if (!NSDecl->isAnonymousNamespace() || | |||
4135 | CGM.getCodeGenOpts().DebugExplicitImport) { | |||
4136 | auto Loc = UD.getLocation(); | |||
4137 | DBuilder.createImportedModule( | |||
4138 | getCurrentContextDescriptor(cast<Decl>(UD.getDeclContext())), | |||
4139 | getOrCreateNamespace(NSDecl), getOrCreateFile(Loc), getLineNumber(Loc)); | |||
4140 | } | |||
4141 | } | |||
4142 | ||||
4143 | void CGDebugInfo::EmitUsingDecl(const UsingDecl &UD) { | |||
4144 | if (CGM.getCodeGenOpts().getDebugInfo() < codegenoptions::LimitedDebugInfo) | |||
| ||||
4145 | return; | |||
4146 | assert(UD.shadow_size() &&(static_cast <bool> (UD.shadow_size() && "We shouldn't be codegening an invalid UsingDecl containing no decls" ) ? void (0) : __assert_fail ("UD.shadow_size() && \"We shouldn't be codegening an invalid UsingDecl containing no decls\"" , "/build/llvm-toolchain-snapshot-7~svn338205/tools/clang/lib/CodeGen/CGDebugInfo.cpp" , 4147, __extension__ __PRETTY_FUNCTION__)) | |||
4147 | "We shouldn't be codegening an invalid UsingDecl containing no decls")(static_cast <bool> (UD.shadow_size() && "We shouldn't be codegening an invalid UsingDecl containing no decls" ) ? void (0) : __assert_fail ("UD.shadow_size() && \"We shouldn't be codegening an invalid UsingDecl containing no decls\"" , "/build/llvm-toolchain-snapshot-7~svn338205/tools/clang/lib/CodeGen/CGDebugInfo.cpp" , 4147, __extension__ __PRETTY_FUNCTION__)); | |||
4148 | // Emitting one decl is sufficient - debuggers can detect that this is an | |||
4149 | // overloaded name & provide lookup for all the overloads. | |||
4150 | const UsingShadowDecl &USD = **UD.shadow_begin(); | |||
4151 | ||||
4152 | // FIXME: Skip functions with undeduced auto return type for now since we | |||
4153 | // don't currently have the plumbing for separate declarations & definitions | |||
4154 | // of free functions and mismatched types (auto in the declaration, concrete | |||
4155 | // return type in the definition) | |||
4156 | if (const auto *FD = dyn_cast<FunctionDecl>(USD.getUnderlyingDecl())) | |||
4157 | if (const auto *AT = | |||
4158 | FD->getType()->getAs<FunctionProtoType>()->getContainedAutoType()) | |||
4159 | if (AT->getDeducedType().isNull()) | |||
4160 | return; | |||
4161 | if (llvm::DINode *Target = | |||
4162 | getDeclarationOrDefinition(USD.getUnderlyingDecl())) { | |||
4163 | auto Loc = USD.getLocation(); | |||
4164 | DBuilder.createImportedDeclaration( | |||
4165 | getCurrentContextDescriptor(cast<Decl>(USD.getDeclContext())), Target, | |||
4166 | getOrCreateFile(Loc), getLineNumber(Loc)); | |||
4167 | } | |||
4168 | } | |||
4169 | ||||
4170 | void CGDebugInfo::EmitImportDecl(const ImportDecl &ID) { | |||
4171 | if (CGM.getCodeGenOpts().getDebuggerTuning() != llvm::DebuggerKind::LLDB) | |||
4172 | return; | |||
4173 | if (Module *M = ID.getImportedModule()) { | |||
4174 | auto Info = ExternalASTSource::ASTSourceDescriptor(*M); | |||
4175 | auto Loc = ID.getLocation(); | |||
4176 | DBuilder.createImportedDeclaration( | |||
4177 | getCurrentContextDescriptor(cast<Decl>(ID.getDeclContext())), | |||
4178 | getOrCreateModuleRef(Info, DebugTypeExtRefs), getOrCreateFile(Loc), | |||
4179 | getLineNumber(Loc)); | |||
4180 | } | |||
4181 | } | |||
4182 | ||||
4183 | llvm::DIImportedEntity * | |||
4184 | CGDebugInfo::EmitNamespaceAlias(const NamespaceAliasDecl &NA) { | |||
4185 | if (CGM.getCodeGenOpts().getDebugInfo() < codegenoptions::LimitedDebugInfo) | |||
4186 | return nullptr; | |||
4187 | auto &VH = NamespaceAliasCache[&NA]; | |||
4188 | if (VH) | |||
4189 | return cast<llvm::DIImportedEntity>(VH); | |||
4190 | llvm::DIImportedEntity *R; | |||
4191 | auto Loc = NA.getLocation(); | |||
4192 | if (const auto *Underlying = | |||
4193 | dyn_cast<NamespaceAliasDecl>(NA.getAliasedNamespace())) | |||
4194 | // This could cache & dedup here rather than relying on metadata deduping. | |||
4195 | R = DBuilder.createImportedDeclaration( | |||
4196 | getCurrentContextDescriptor(cast<Decl>(NA.getDeclContext())), | |||
4197 | EmitNamespaceAlias(*Underlying), getOrCreateFile(Loc), | |||
4198 | getLineNumber(Loc), NA.getName()); | |||
4199 | else | |||
4200 | R = DBuilder.createImportedDeclaration( | |||
4201 | getCurrentContextDescriptor(cast<Decl>(NA.getDeclContext())), | |||
4202 | getOrCreateNamespace(cast<NamespaceDecl>(NA.getAliasedNamespace())), | |||
4203 | getOrCreateFile(Loc), getLineNumber(Loc), NA.getName()); | |||
4204 | VH.reset(R); | |||
4205 | return R; | |||
4206 | } | |||
4207 | ||||
4208 | llvm::DINamespace * | |||
4209 | CGDebugInfo::getOrCreateNamespace(const NamespaceDecl *NSDecl) { | |||
4210 | // Don't canonicalize the NamespaceDecl here: The DINamespace will be uniqued | |||
4211 | // if necessary, and this way multiple declarations of the same namespace in | |||
4212 | // different parent modules stay distinct. | |||
4213 | auto I = NamespaceCache.find(NSDecl); | |||
4214 | if (I != NamespaceCache.end()) | |||
4215 | return cast<llvm::DINamespace>(I->second); | |||
4216 | ||||
4217 | llvm::DIScope *Context = getDeclContextDescriptor(NSDecl); | |||
4218 | // Don't trust the context if it is a DIModule (see comment above). | |||
4219 | llvm::DINamespace *NS = | |||
4220 | DBuilder.createNameSpace(Context, NSDecl->getName(), NSDecl->isInline()); | |||
4221 | NamespaceCache[NSDecl].reset(NS); | |||
4222 | return NS; | |||
4223 | } | |||
4224 | ||||
4225 | void CGDebugInfo::setDwoId(uint64_t Signature) { | |||
4226 | assert(TheCU && "no main compile unit")(static_cast <bool> (TheCU && "no main compile unit" ) ? void (0) : __assert_fail ("TheCU && \"no main compile unit\"" , "/build/llvm-toolchain-snapshot-7~svn338205/tools/clang/lib/CodeGen/CGDebugInfo.cpp" , 4226, __extension__ __PRETTY_FUNCTION__)); | |||
4227 | TheCU->setDWOId(Signature); | |||
4228 | } | |||
4229 | ||||
4230 | void CGDebugInfo::finalize() { | |||
4231 | // Creating types might create further types - invalidating the current | |||
4232 | // element and the size(), so don't cache/reference them. | |||
4233 | for (size_t i = 0; i != ObjCInterfaceCache.size(); ++i) { | |||
4234 | ObjCInterfaceCacheEntry E = ObjCInterfaceCache[i]; | |||
4235 | llvm::DIType *Ty = E.Type->getDecl()->getDefinition() | |||
4236 | ? CreateTypeDefinition(E.Type, E.Unit) | |||
4237 | : E.Decl; | |||
4238 | DBuilder.replaceTemporary(llvm::TempDIType(E.Decl), Ty); | |||
4239 | } | |||
4240 | ||||
4241 | if (CGM.getCodeGenOpts().DwarfVersion >= 5) { | |||
4242 | // Add methods to interface. | |||
4243 | for (const auto &P : ObjCMethodCache) { | |||
4244 | if (P.second.empty()) | |||
4245 | continue; | |||
4246 | ||||
4247 | QualType QTy(P.first->getTypeForDecl(), 0); | |||
4248 | auto It = TypeCache.find(QTy.getAsOpaquePtr()); | |||
4249 | assert(It != TypeCache.end())(static_cast <bool> (It != TypeCache.end()) ? void (0) : __assert_fail ("It != TypeCache.end()", "/build/llvm-toolchain-snapshot-7~svn338205/tools/clang/lib/CodeGen/CGDebugInfo.cpp" , 4249, __extension__ __PRETTY_FUNCTION__)); | |||
4250 | ||||
4251 | llvm::DICompositeType *InterfaceDecl = | |||
4252 | cast<llvm::DICompositeType>(It->second); | |||
4253 | ||||
4254 | SmallVector<llvm::Metadata *, 16> EltTys; | |||
4255 | auto CurrenetElts = InterfaceDecl->getElements(); | |||
4256 | EltTys.append(CurrenetElts.begin(), CurrenetElts.end()); | |||
4257 | for (auto &MD : P.second) | |||
4258 | EltTys.push_back(MD); | |||
4259 | llvm::DINodeArray Elements = DBuilder.getOrCreateArray(EltTys); | |||
4260 | DBuilder.replaceArrays(InterfaceDecl, Elements); | |||
4261 | } | |||
4262 | } | |||
4263 | ||||
4264 | for (const auto &P : ReplaceMap) { | |||
4265 | assert(P.second)(static_cast <bool> (P.second) ? void (0) : __assert_fail ("P.second", "/build/llvm-toolchain-snapshot-7~svn338205/tools/clang/lib/CodeGen/CGDebugInfo.cpp" , 4265, __extension__ __PRETTY_FUNCTION__)); | |||
4266 | auto *Ty = cast<llvm::DIType>(P.second); | |||
4267 | assert(Ty->isForwardDecl())(static_cast <bool> (Ty->isForwardDecl()) ? void (0) : __assert_fail ("Ty->isForwardDecl()", "/build/llvm-toolchain-snapshot-7~svn338205/tools/clang/lib/CodeGen/CGDebugInfo.cpp" , 4267, __extension__ __PRETTY_FUNCTION__)); | |||
4268 | ||||
4269 | auto It = TypeCache.find(P.first); | |||
4270 | assert(It != TypeCache.end())(static_cast <bool> (It != TypeCache.end()) ? void (0) : __assert_fail ("It != TypeCache.end()", "/build/llvm-toolchain-snapshot-7~svn338205/tools/clang/lib/CodeGen/CGDebugInfo.cpp" , 4270, __extension__ __PRETTY_FUNCTION__)); | |||
4271 | assert(It->second)(static_cast <bool> (It->second) ? void (0) : __assert_fail ("It->second", "/build/llvm-toolchain-snapshot-7~svn338205/tools/clang/lib/CodeGen/CGDebugInfo.cpp" , 4271, __extension__ __PRETTY_FUNCTION__)); | |||
4272 | ||||
4273 | DBuilder.replaceTemporary(llvm::TempDIType(Ty), | |||
4274 | cast<llvm::DIType>(It->second)); | |||
4275 | } | |||
4276 | ||||
4277 | for (const auto &P : FwdDeclReplaceMap) { | |||
4278 | assert(P.second)(static_cast <bool> (P.second) ? void (0) : __assert_fail ("P.second", "/build/llvm-toolchain-snapshot-7~svn338205/tools/clang/lib/CodeGen/CGDebugInfo.cpp" , 4278, __extension__ __PRETTY_FUNCTION__)); | |||
4279 | llvm::TempMDNode FwdDecl(cast<llvm::MDNode>(P.second)); | |||
4280 | llvm::Metadata *Repl; | |||
4281 | ||||
4282 | auto It = DeclCache.find(P.first); | |||
4283 | // If there has been no definition for the declaration, call RAUW | |||
4284 | // with ourselves, that will destroy the temporary MDNode and | |||
4285 | // replace it with a standard one, avoiding leaking memory. | |||
4286 | if (It == DeclCache.end()) | |||
4287 | Repl = P.second; | |||
4288 | else | |||
4289 | Repl = It->second; | |||
4290 | ||||
4291 | if (auto *GVE = dyn_cast_or_null<llvm::DIGlobalVariableExpression>(Repl)) | |||
4292 | Repl = GVE->getVariable(); | |||
4293 | DBuilder.replaceTemporary(std::move(FwdDecl), cast<llvm::MDNode>(Repl)); | |||
4294 | } | |||
4295 | ||||
4296 | // We keep our own list of retained types, because we need to look | |||
4297 | // up the final type in the type cache. | |||
4298 | for (auto &RT : RetainedTypes) | |||
4299 | if (auto MD = TypeCache[RT]) | |||
4300 | DBuilder.retainType(cast<llvm::DIType>(MD)); | |||
4301 | ||||
4302 | DBuilder.finalize(); | |||
4303 | } | |||
4304 | ||||
4305 | void CGDebugInfo::EmitExplicitCastType(QualType Ty) { | |||
4306 | if (CGM.getCodeGenOpts().getDebugInfo() < codegenoptions::LimitedDebugInfo) | |||
4307 | return; | |||
4308 | ||||
4309 | if (auto *DieTy = getOrCreateType(Ty, getOrCreateMainFile())) | |||
4310 | // Don't ignore in case of explicit cast where it is referenced indirectly. | |||
4311 | DBuilder.retainType(DieTy); | |||
4312 | } | |||
4313 | ||||
4314 | llvm::DebugLoc CGDebugInfo::SourceLocToDebugLoc(SourceLocation Loc) { | |||
4315 | if (LexicalBlockStack.empty()) | |||
4316 | return llvm::DebugLoc(); | |||
4317 | ||||
4318 | llvm::MDNode *Scope = LexicalBlockStack.back(); | |||
4319 | return llvm::DebugLoc::get(getLineNumber(Loc), getColumnNumber(Loc), Scope); | |||
4320 | } |
1 | //===- llvm/Support/Casting.h - Allow flexible, checked, casts --*- C++ -*-===// |
2 | // |
3 | // The LLVM Compiler Infrastructure |
4 | // |
5 | // This file is distributed under the University of Illinois Open Source |
6 | // License. See LICENSE.TXT for details. |
7 | // |
8 | //===----------------------------------------------------------------------===// |
9 | // |
10 | // This file defines the isa<X>(), cast<X>(), dyn_cast<X>(), cast_or_null<X>(), |
11 | // and dyn_cast_or_null<X>() templates. |
12 | // |
13 | //===----------------------------------------------------------------------===// |
14 | |
15 | #ifndef LLVM_SUPPORT_CASTING_H |
16 | #define LLVM_SUPPORT_CASTING_H |
17 | |
18 | #include "llvm/Support/Compiler.h" |
19 | #include "llvm/Support/type_traits.h" |
20 | #include <cassert> |
21 | #include <memory> |
22 | #include <type_traits> |
23 | |
24 | namespace llvm { |
25 | |
26 | //===----------------------------------------------------------------------===// |
27 | // isa<x> Support Templates |
28 | //===----------------------------------------------------------------------===// |
29 | |
30 | // Define a template that can be specialized by smart pointers to reflect the |
31 | // fact that they are automatically dereferenced, and are not involved with the |
32 | // template selection process... the default implementation is a noop. |
33 | // |
34 | template<typename From> struct simplify_type { |
35 | using SimpleType = From; // The real type this represents... |
36 | |
37 | // An accessor to get the real value... |
38 | static SimpleType &getSimplifiedValue(From &Val) { return Val; } |
39 | }; |
40 | |
41 | template<typename From> struct simplify_type<const From> { |
42 | using NonConstSimpleType = typename simplify_type<From>::SimpleType; |
43 | using SimpleType = |
44 | typename add_const_past_pointer<NonConstSimpleType>::type; |
45 | using RetType = |
46 | typename add_lvalue_reference_if_not_pointer<SimpleType>::type; |
47 | |
48 | static RetType getSimplifiedValue(const From& Val) { |
49 | return simplify_type<From>::getSimplifiedValue(const_cast<From&>(Val)); |
50 | } |
51 | }; |
52 | |
53 | // The core of the implementation of isa<X> is here; To and From should be |
54 | // the names of classes. This template can be specialized to customize the |
55 | // implementation of isa<> without rewriting it from scratch. |
56 | template <typename To, typename From, typename Enabler = void> |
57 | struct isa_impl { |
58 | static inline bool doit(const From &Val) { |
59 | return To::classof(&Val); |
60 | } |
61 | }; |
62 | |
63 | /// Always allow upcasts, and perform no dynamic check for them. |
64 | template <typename To, typename From> |
65 | struct isa_impl< |
66 | To, From, typename std::enable_if<std::is_base_of<To, From>::value>::type> { |
67 | static inline bool doit(const From &) { return true; } |
68 | }; |
69 | |
70 | template <typename To, typename From> struct isa_impl_cl { |
71 | static inline bool doit(const From &Val) { |
72 | return isa_impl<To, From>::doit(Val); |
73 | } |
74 | }; |
75 | |
76 | template <typename To, typename From> struct isa_impl_cl<To, const From> { |
77 | static inline bool doit(const From &Val) { |
78 | return isa_impl<To, From>::doit(Val); |
79 | } |
80 | }; |
81 | |
82 | template <typename To, typename From> |
83 | struct isa_impl_cl<To, const std::unique_ptr<From>> { |
84 | static inline bool doit(const std::unique_ptr<From> &Val) { |
85 | assert(Val && "isa<> used on a null pointer")(static_cast <bool> (Val && "isa<> used on a null pointer" ) ? void (0) : __assert_fail ("Val && \"isa<> used on a null pointer\"" , "/build/llvm-toolchain-snapshot-7~svn338205/include/llvm/Support/Casting.h" , 85, __extension__ __PRETTY_FUNCTION__)); |
86 | return isa_impl_cl<To, From>::doit(*Val); |
87 | } |
88 | }; |
89 | |
90 | template <typename To, typename From> struct isa_impl_cl<To, From*> { |
91 | static inline bool doit(const From *Val) { |
92 | assert(Val && "isa<> used on a null pointer")(static_cast <bool> (Val && "isa<> used on a null pointer" ) ? void (0) : __assert_fail ("Val && \"isa<> used on a null pointer\"" , "/build/llvm-toolchain-snapshot-7~svn338205/include/llvm/Support/Casting.h" , 92, __extension__ __PRETTY_FUNCTION__)); |
93 | return isa_impl<To, From>::doit(*Val); |
94 | } |
95 | }; |
96 | |
97 | template <typename To, typename From> struct isa_impl_cl<To, From*const> { |
98 | static inline bool doit(const From *Val) { |
99 | assert(Val && "isa<> used on a null pointer")(static_cast <bool> (Val && "isa<> used on a null pointer" ) ? void (0) : __assert_fail ("Val && \"isa<> used on a null pointer\"" , "/build/llvm-toolchain-snapshot-7~svn338205/include/llvm/Support/Casting.h" , 99, __extension__ __PRETTY_FUNCTION__)); |
100 | return isa_impl<To, From>::doit(*Val); |
101 | } |
102 | }; |
103 | |
104 | template <typename To, typename From> struct isa_impl_cl<To, const From*> { |
105 | static inline bool doit(const From *Val) { |
106 | assert(Val && "isa<> used on a null pointer")(static_cast <bool> (Val && "isa<> used on a null pointer" ) ? void (0) : __assert_fail ("Val && \"isa<> used on a null pointer\"" , "/build/llvm-toolchain-snapshot-7~svn338205/include/llvm/Support/Casting.h" , 106, __extension__ __PRETTY_FUNCTION__)); |
107 | return isa_impl<To, From>::doit(*Val); |
108 | } |
109 | }; |
110 | |
111 | template <typename To, typename From> struct isa_impl_cl<To, const From*const> { |
112 | static inline bool doit(const From *Val) { |
113 | assert(Val && "isa<> used on a null pointer")(static_cast <bool> (Val && "isa<> used on a null pointer" ) ? void (0) : __assert_fail ("Val && \"isa<> used on a null pointer\"" , "/build/llvm-toolchain-snapshot-7~svn338205/include/llvm/Support/Casting.h" , 113, __extension__ __PRETTY_FUNCTION__)); |
114 | return isa_impl<To, From>::doit(*Val); |
115 | } |
116 | }; |
117 | |
118 | template<typename To, typename From, typename SimpleFrom> |
119 | struct isa_impl_wrap { |
120 | // When From != SimplifiedType, we can simplify the type some more by using |
121 | // the simplify_type template. |
122 | static bool doit(const From &Val) { |
123 | return isa_impl_wrap<To, SimpleFrom, |
124 | typename simplify_type<SimpleFrom>::SimpleType>::doit( |
125 | simplify_type<const From>::getSimplifiedValue(Val)); |
126 | } |
127 | }; |
128 | |
129 | template<typename To, typename FromTy> |
130 | struct isa_impl_wrap<To, FromTy, FromTy> { |
131 | // When From == SimpleType, we are as simple as we are going to get. |
132 | static bool doit(const FromTy &Val) { |
133 | return isa_impl_cl<To,FromTy>::doit(Val); |
134 | } |
135 | }; |
136 | |
137 | // isa<X> - Return true if the parameter to the template is an instance of the |
138 | // template type argument. Used like this: |
139 | // |
140 | // if (isa<Type>(myVal)) { ... } |
141 | // |
142 | template <class X, class Y> LLVM_NODISCARD[[clang::warn_unused_result]] inline bool isa(const Y &Val) { |
143 | return isa_impl_wrap<X, const Y, |
144 | typename simplify_type<const Y>::SimpleType>::doit(Val); |
145 | } |
146 | |
147 | //===----------------------------------------------------------------------===// |
148 | // cast<x> Support Templates |
149 | //===----------------------------------------------------------------------===// |
150 | |
151 | template<class To, class From> struct cast_retty; |
152 | |
153 | // Calculate what type the 'cast' function should return, based on a requested |
154 | // type of To and a source type of From. |
155 | template<class To, class From> struct cast_retty_impl { |
156 | using ret_type = To &; // Normal case, return Ty& |
157 | }; |
158 | template<class To, class From> struct cast_retty_impl<To, const From> { |
159 | using ret_type = const To &; // Normal case, return Ty& |
160 | }; |
161 | |
162 | template<class To, class From> struct cast_retty_impl<To, From*> { |
163 | using ret_type = To *; // Pointer arg case, return Ty* |
164 | }; |
165 | |
166 | template<class To, class From> struct cast_retty_impl<To, const From*> { |
167 | using ret_type = const To *; // Constant pointer arg case, return const Ty* |
168 | }; |
169 | |
170 | template<class To, class From> struct cast_retty_impl<To, const From*const> { |
171 | using ret_type = const To *; // Constant pointer arg case, return const Ty* |
172 | }; |
173 | |
174 | template <class To, class From> |
175 | struct cast_retty_impl<To, std::unique_ptr<From>> { |
176 | private: |
177 | using PointerType = typename cast_retty_impl<To, From *>::ret_type; |
178 | using ResultType = typename std::remove_pointer<PointerType>::type; |
179 | |
180 | public: |
181 | using ret_type = std::unique_ptr<ResultType>; |
182 | }; |
183 | |
184 | template<class To, class From, class SimpleFrom> |
185 | struct cast_retty_wrap { |
186 | // When the simplified type and the from type are not the same, use the type |
187 | // simplifier to reduce the type, then reuse cast_retty_impl to get the |
188 | // resultant type. |
189 | using ret_type = typename cast_retty<To, SimpleFrom>::ret_type; |
190 | }; |
191 | |
192 | template<class To, class FromTy> |
193 | struct cast_retty_wrap<To, FromTy, FromTy> { |
194 | // When the simplified type is equal to the from type, use it directly. |
195 | using ret_type = typename cast_retty_impl<To,FromTy>::ret_type; |
196 | }; |
197 | |
198 | template<class To, class From> |
199 | struct cast_retty { |
200 | using ret_type = typename cast_retty_wrap< |
201 | To, From, typename simplify_type<From>::SimpleType>::ret_type; |
202 | }; |
203 | |
204 | // Ensure the non-simple values are converted using the simplify_type template |
205 | // that may be specialized by smart pointers... |
206 | // |
207 | template<class To, class From, class SimpleFrom> struct cast_convert_val { |
208 | // This is not a simple type, use the template to simplify it... |
209 | static typename cast_retty<To, From>::ret_type doit(From &Val) { |
210 | return cast_convert_val<To, SimpleFrom, |
211 | typename simplify_type<SimpleFrom>::SimpleType>::doit( |
212 | simplify_type<From>::getSimplifiedValue(Val)); |
213 | } |
214 | }; |
215 | |
216 | template<class To, class FromTy> struct cast_convert_val<To,FromTy,FromTy> { |
217 | // This _is_ a simple type, just cast it. |
218 | static typename cast_retty<To, FromTy>::ret_type doit(const FromTy &Val) { |
219 | typename cast_retty<To, FromTy>::ret_type Res2 |
220 | = (typename cast_retty<To, FromTy>::ret_type)const_cast<FromTy&>(Val); |
221 | return Res2; |
222 | } |
223 | }; |
224 | |
225 | template <class X> struct is_simple_type { |
226 | static const bool value = |
227 | std::is_same<X, typename simplify_type<X>::SimpleType>::value; |
228 | }; |
229 | |
230 | // cast<X> - Return the argument parameter cast to the specified type. This |
231 | // casting operator asserts that the type is correct, so it does not return null |
232 | // on failure. It does not allow a null argument (use cast_or_null for that). |
233 | // It is typically used like this: |
234 | // |
235 | // cast<Instruction>(myVal)->getParent() |
236 | // |
237 | template <class X, class Y> |
238 | inline typename std::enable_if<!is_simple_type<Y>::value, |
239 | typename cast_retty<X, const Y>::ret_type>::type |
240 | cast(const Y &Val) { |
241 | assert(isa<X>(Val) && "cast<Ty>() argument of incompatible type!")(static_cast <bool> (isa<X>(Val) && "cast<Ty>() argument of incompatible type!" ) ? void (0) : __assert_fail ("isa<X>(Val) && \"cast<Ty>() argument of incompatible type!\"" , "/build/llvm-toolchain-snapshot-7~svn338205/include/llvm/Support/Casting.h" , 241, __extension__ __PRETTY_FUNCTION__)); |
242 | return cast_convert_val< |
243 | X, const Y, typename simplify_type<const Y>::SimpleType>::doit(Val); |
244 | } |
245 | |
246 | template <class X, class Y> |
247 | inline typename cast_retty<X, Y>::ret_type cast(Y &Val) { |
248 | assert(isa<X>(Val) && "cast<Ty>() argument of incompatible type!")(static_cast <bool> (isa<X>(Val) && "cast<Ty>() argument of incompatible type!" ) ? void (0) : __assert_fail ("isa<X>(Val) && \"cast<Ty>() argument of incompatible type!\"" , "/build/llvm-toolchain-snapshot-7~svn338205/include/llvm/Support/Casting.h" , 248, __extension__ __PRETTY_FUNCTION__)); |
249 | return cast_convert_val<X, Y, |
250 | typename simplify_type<Y>::SimpleType>::doit(Val); |
251 | } |
252 | |
253 | template <class X, class Y> |
254 | inline typename cast_retty<X, Y *>::ret_type cast(Y *Val) { |
255 | assert(isa<X>(Val) && "cast<Ty>() argument of incompatible type!")(static_cast <bool> (isa<X>(Val) && "cast<Ty>() argument of incompatible type!" ) ? void (0) : __assert_fail ("isa<X>(Val) && \"cast<Ty>() argument of incompatible type!\"" , "/build/llvm-toolchain-snapshot-7~svn338205/include/llvm/Support/Casting.h" , 255, __extension__ __PRETTY_FUNCTION__)); |
256 | return cast_convert_val<X, Y*, |
257 | typename simplify_type<Y*>::SimpleType>::doit(Val); |
258 | } |
259 | |
260 | template <class X, class Y> |
261 | inline typename cast_retty<X, std::unique_ptr<Y>>::ret_type |
262 | cast(std::unique_ptr<Y> &&Val) { |
263 | assert(isa<X>(Val.get()) && "cast<Ty>() argument of incompatible type!")(static_cast <bool> (isa<X>(Val.get()) && "cast<Ty>() argument of incompatible type!") ? void (0 ) : __assert_fail ("isa<X>(Val.get()) && \"cast<Ty>() argument of incompatible type!\"" , "/build/llvm-toolchain-snapshot-7~svn338205/include/llvm/Support/Casting.h" , 263, __extension__ __PRETTY_FUNCTION__)); |
264 | using ret_type = typename cast_retty<X, std::unique_ptr<Y>>::ret_type; |
265 | return ret_type( |
266 | cast_convert_val<X, Y *, typename simplify_type<Y *>::SimpleType>::doit( |
267 | Val.release())); |
268 | } |
269 | |
270 | // cast_or_null<X> - Functionally identical to cast, except that a null value is |
271 | // accepted. |
272 | // |
273 | template <class X, class Y> |
274 | LLVM_NODISCARD[[clang::warn_unused_result]] inline |
275 | typename std::enable_if<!is_simple_type<Y>::value, |
276 | typename cast_retty<X, const Y>::ret_type>::type |
277 | cast_or_null(const Y &Val) { |
278 | if (!Val) |
279 | return nullptr; |
280 | assert(isa<X>(Val) && "cast_or_null<Ty>() argument of incompatible type!")(static_cast <bool> (isa<X>(Val) && "cast_or_null<Ty>() argument of incompatible type!" ) ? void (0) : __assert_fail ("isa<X>(Val) && \"cast_or_null<Ty>() argument of incompatible type!\"" , "/build/llvm-toolchain-snapshot-7~svn338205/include/llvm/Support/Casting.h" , 280, __extension__ __PRETTY_FUNCTION__)); |
281 | return cast<X>(Val); |
282 | } |
283 | |
284 | template <class X, class Y> |
285 | LLVM_NODISCARD[[clang::warn_unused_result]] inline |
286 | typename std::enable_if<!is_simple_type<Y>::value, |
287 | typename cast_retty<X, Y>::ret_type>::type |
288 | cast_or_null(Y &Val) { |
289 | if (!Val) |
290 | return nullptr; |
291 | assert(isa<X>(Val) && "cast_or_null<Ty>() argument of incompatible type!")(static_cast <bool> (isa<X>(Val) && "cast_or_null<Ty>() argument of incompatible type!" ) ? void (0) : __assert_fail ("isa<X>(Val) && \"cast_or_null<Ty>() argument of incompatible type!\"" , "/build/llvm-toolchain-snapshot-7~svn338205/include/llvm/Support/Casting.h" , 291, __extension__ __PRETTY_FUNCTION__)); |
292 | return cast<X>(Val); |
293 | } |
294 | |
295 | template <class X, class Y> |
296 | LLVM_NODISCARD[[clang::warn_unused_result]] inline typename cast_retty<X, Y *>::ret_type |
297 | cast_or_null(Y *Val) { |
298 | if (!Val) return nullptr; |
299 | assert(isa<X>(Val) && "cast_or_null<Ty>() argument of incompatible type!")(static_cast <bool> (isa<X>(Val) && "cast_or_null<Ty>() argument of incompatible type!" ) ? void (0) : __assert_fail ("isa<X>(Val) && \"cast_or_null<Ty>() argument of incompatible type!\"" , "/build/llvm-toolchain-snapshot-7~svn338205/include/llvm/Support/Casting.h" , 299, __extension__ __PRETTY_FUNCTION__)); |
300 | return cast<X>(Val); |
301 | } |
302 | |
303 | template <class X, class Y> |
304 | inline typename cast_retty<X, std::unique_ptr<Y>>::ret_type |
305 | cast_or_null(std::unique_ptr<Y> &&Val) { |
306 | if (!Val) |
307 | return nullptr; |
308 | return cast<X>(std::move(Val)); |
309 | } |
310 | |
311 | // dyn_cast<X> - Return the argument parameter cast to the specified type. This |
312 | // casting operator returns null if the argument is of the wrong type, so it can |
313 | // be used to test for a type as well as cast if successful. This should be |
314 | // used in the context of an if statement like this: |
315 | // |
316 | // if (const Instruction *I = dyn_cast<Instruction>(myVal)) { ... } |
317 | // |
318 | |
319 | template <class X, class Y> |
320 | LLVM_NODISCARD[[clang::warn_unused_result]] inline |
321 | typename std::enable_if<!is_simple_type<Y>::value, |
322 | typename cast_retty<X, const Y>::ret_type>::type |
323 | dyn_cast(const Y &Val) { |
324 | return isa<X>(Val) ? cast<X>(Val) : nullptr; |
325 | } |
326 | |
327 | template <class X, class Y> |
328 | LLVM_NODISCARD[[clang::warn_unused_result]] inline typename cast_retty<X, Y>::ret_type dyn_cast(Y &Val) { |
329 | return isa<X>(Val) ? cast<X>(Val) : nullptr; |
330 | } |
331 | |
332 | template <class X, class Y> |
333 | LLVM_NODISCARD[[clang::warn_unused_result]] inline typename cast_retty<X, Y *>::ret_type dyn_cast(Y *Val) { |
334 | return isa<X>(Val) ? cast<X>(Val) : nullptr; |
335 | } |
336 | |
337 | // dyn_cast_or_null<X> - Functionally identical to dyn_cast, except that a null |
338 | // value is accepted. |
339 | // |
340 | template <class X, class Y> |
341 | LLVM_NODISCARD[[clang::warn_unused_result]] inline |
342 | typename std::enable_if<!is_simple_type<Y>::value, |
343 | typename cast_retty<X, const Y>::ret_type>::type |
344 | dyn_cast_or_null(const Y &Val) { |
345 | return (Val && isa<X>(Val)) ? cast<X>(Val) : nullptr; |
346 | } |
347 | |
348 | template <class X, class Y> |
349 | LLVM_NODISCARD[[clang::warn_unused_result]] inline |
350 | typename std::enable_if<!is_simple_type<Y>::value, |
351 | typename cast_retty<X, Y>::ret_type>::type |
352 | dyn_cast_or_null(Y &Val) { |
353 | return (Val && isa<X>(Val)) ? cast<X>(Val) : nullptr; |
354 | } |
355 | |
356 | template <class X, class Y> |
357 | LLVM_NODISCARD[[clang::warn_unused_result]] inline typename cast_retty<X, Y *>::ret_type |
358 | dyn_cast_or_null(Y *Val) { |
359 | return (Val && isa<X>(Val)) ? cast<X>(Val) : nullptr; |
360 | } |
361 | |
362 | // unique_dyn_cast<X> - Given a unique_ptr<Y>, try to return a unique_ptr<X>, |
363 | // taking ownership of the input pointer iff isa<X>(Val) is true. If the |
364 | // cast is successful, From refers to nullptr on exit and the casted value |
365 | // is returned. If the cast is unsuccessful, the function returns nullptr |
366 | // and From is unchanged. |
367 | template <class X, class Y> |
368 | LLVM_NODISCARD[[clang::warn_unused_result]] inline auto unique_dyn_cast(std::unique_ptr<Y> &Val) |
369 | -> decltype(cast<X>(Val)) { |
370 | if (!isa<X>(Val)) |
371 | return nullptr; |
372 | return cast<X>(std::move(Val)); |
373 | } |
374 | |
375 | template <class X, class Y> |
376 | LLVM_NODISCARD[[clang::warn_unused_result]] inline auto unique_dyn_cast(std::unique_ptr<Y> &&Val) |
377 | -> decltype(cast<X>(Val)) { |
378 | return unique_dyn_cast<X, Y>(Val); |
379 | } |
380 | |
381 | // dyn_cast_or_null<X> - Functionally identical to unique_dyn_cast, except that |
382 | // a null value is accepted. |
383 | template <class X, class Y> |
384 | LLVM_NODISCARD[[clang::warn_unused_result]] inline auto unique_dyn_cast_or_null(std::unique_ptr<Y> &Val) |
385 | -> decltype(cast<X>(Val)) { |
386 | if (!Val) |
387 | return nullptr; |
388 | return unique_dyn_cast<X, Y>(Val); |
389 | } |
390 | |
391 | template <class X, class Y> |
392 | LLVM_NODISCARD[[clang::warn_unused_result]] inline auto unique_dyn_cast_or_null(std::unique_ptr<Y> &&Val) |
393 | -> decltype(cast<X>(Val)) { |
394 | return unique_dyn_cast_or_null<X, Y>(Val); |
395 | } |
396 | |
397 | } // end namespace llvm |
398 | |
399 | #endif // LLVM_SUPPORT_CASTING_H |