Bug Summary

File:tools/clang/lib/AST/NestedNameSpecifier.cpp
Warning:line 469, column 5
Null pointer passed as an argument to a 'nonnull' parameter

Annotated Source Code

1//===--- NestedNameSpecifier.cpp - C++ nested name specifiers -----*- 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 NestedNameSpecifier class, which represents
11// a C++ nested-name-specifier.
12//
13//===----------------------------------------------------------------------===//
14#include "clang/AST/NestedNameSpecifier.h"
15#include "clang/AST/ASTContext.h"
16#include "clang/AST/Decl.h"
17#include "clang/AST/DeclCXX.h"
18#include "clang/AST/PrettyPrinter.h"
19#include "clang/AST/Type.h"
20#include "clang/AST/TypeLoc.h"
21#include "llvm/Support/AlignOf.h"
22#include "llvm/Support/raw_ostream.h"
23#include <cassert>
24
25using namespace clang;
26
27NestedNameSpecifier *
28NestedNameSpecifier::FindOrInsert(const ASTContext &Context,
29 const NestedNameSpecifier &Mockup) {
30 llvm::FoldingSetNodeID ID;
31 Mockup.Profile(ID);
32
33 void *InsertPos = nullptr;
34 NestedNameSpecifier *NNS
35 = Context.NestedNameSpecifiers.FindNodeOrInsertPos(ID, InsertPos);
36 if (!NNS) {
37 NNS =
38 new (Context, alignof(NestedNameSpecifier)) NestedNameSpecifier(Mockup);
39 Context.NestedNameSpecifiers.InsertNode(NNS, InsertPos);
40 }
41
42 return NNS;
43}
44
45NestedNameSpecifier *
46NestedNameSpecifier::Create(const ASTContext &Context,
47 NestedNameSpecifier *Prefix, IdentifierInfo *II) {
48 assert(II && "Identifier cannot be NULL")((II && "Identifier cannot be NULL") ? static_cast<
void> (0) : __assert_fail ("II && \"Identifier cannot be NULL\""
, "/build/llvm-toolchain-snapshot-6.0~svn315928/tools/clang/lib/AST/NestedNameSpecifier.cpp"
, 48, __PRETTY_FUNCTION__))
;
49 assert((!Prefix || Prefix->isDependent()) && "Prefix must be dependent")(((!Prefix || Prefix->isDependent()) && "Prefix must be dependent"
) ? static_cast<void> (0) : __assert_fail ("(!Prefix || Prefix->isDependent()) && \"Prefix must be dependent\""
, "/build/llvm-toolchain-snapshot-6.0~svn315928/tools/clang/lib/AST/NestedNameSpecifier.cpp"
, 49, __PRETTY_FUNCTION__))
;
50
51 NestedNameSpecifier Mockup;
52 Mockup.Prefix.setPointer(Prefix);
53 Mockup.Prefix.setInt(StoredIdentifier);
54 Mockup.Specifier = II;
55 return FindOrInsert(Context, Mockup);
56}
57
58NestedNameSpecifier *
59NestedNameSpecifier::Create(const ASTContext &Context,
60 NestedNameSpecifier *Prefix,
61 const NamespaceDecl *NS) {
62 assert(NS && "Namespace cannot be NULL")((NS && "Namespace cannot be NULL") ? static_cast<
void> (0) : __assert_fail ("NS && \"Namespace cannot be NULL\""
, "/build/llvm-toolchain-snapshot-6.0~svn315928/tools/clang/lib/AST/NestedNameSpecifier.cpp"
, 62, __PRETTY_FUNCTION__))
;
63 assert((!Prefix ||(((!Prefix || (Prefix->getAsType() == nullptr && Prefix
->getAsIdentifier() == nullptr)) && "Broken nested name specifier"
) ? static_cast<void> (0) : __assert_fail ("(!Prefix || (Prefix->getAsType() == nullptr && Prefix->getAsIdentifier() == nullptr)) && \"Broken nested name specifier\""
, "/build/llvm-toolchain-snapshot-6.0~svn315928/tools/clang/lib/AST/NestedNameSpecifier.cpp"
, 66, __PRETTY_FUNCTION__))
64 (Prefix->getAsType() == nullptr &&(((!Prefix || (Prefix->getAsType() == nullptr && Prefix
->getAsIdentifier() == nullptr)) && "Broken nested name specifier"
) ? static_cast<void> (0) : __assert_fail ("(!Prefix || (Prefix->getAsType() == nullptr && Prefix->getAsIdentifier() == nullptr)) && \"Broken nested name specifier\""
, "/build/llvm-toolchain-snapshot-6.0~svn315928/tools/clang/lib/AST/NestedNameSpecifier.cpp"
, 66, __PRETTY_FUNCTION__))
65 Prefix->getAsIdentifier() == nullptr)) &&(((!Prefix || (Prefix->getAsType() == nullptr && Prefix
->getAsIdentifier() == nullptr)) && "Broken nested name specifier"
) ? static_cast<void> (0) : __assert_fail ("(!Prefix || (Prefix->getAsType() == nullptr && Prefix->getAsIdentifier() == nullptr)) && \"Broken nested name specifier\""
, "/build/llvm-toolchain-snapshot-6.0~svn315928/tools/clang/lib/AST/NestedNameSpecifier.cpp"
, 66, __PRETTY_FUNCTION__))
66 "Broken nested name specifier")(((!Prefix || (Prefix->getAsType() == nullptr && Prefix
->getAsIdentifier() == nullptr)) && "Broken nested name specifier"
) ? static_cast<void> (0) : __assert_fail ("(!Prefix || (Prefix->getAsType() == nullptr && Prefix->getAsIdentifier() == nullptr)) && \"Broken nested name specifier\""
, "/build/llvm-toolchain-snapshot-6.0~svn315928/tools/clang/lib/AST/NestedNameSpecifier.cpp"
, 66, __PRETTY_FUNCTION__))
;
67 NestedNameSpecifier Mockup;
68 Mockup.Prefix.setPointer(Prefix);
69 Mockup.Prefix.setInt(StoredDecl);
70 Mockup.Specifier = const_cast<NamespaceDecl *>(NS);
71 return FindOrInsert(Context, Mockup);
72}
73
74NestedNameSpecifier *
75NestedNameSpecifier::Create(const ASTContext &Context,
76 NestedNameSpecifier *Prefix,
77 NamespaceAliasDecl *Alias) {
78 assert(Alias && "Namespace alias cannot be NULL")((Alias && "Namespace alias cannot be NULL") ? static_cast
<void> (0) : __assert_fail ("Alias && \"Namespace alias cannot be NULL\""
, "/build/llvm-toolchain-snapshot-6.0~svn315928/tools/clang/lib/AST/NestedNameSpecifier.cpp"
, 78, __PRETTY_FUNCTION__))
;
79 assert((!Prefix ||(((!Prefix || (Prefix->getAsType() == nullptr && Prefix
->getAsIdentifier() == nullptr)) && "Broken nested name specifier"
) ? static_cast<void> (0) : __assert_fail ("(!Prefix || (Prefix->getAsType() == nullptr && Prefix->getAsIdentifier() == nullptr)) && \"Broken nested name specifier\""
, "/build/llvm-toolchain-snapshot-6.0~svn315928/tools/clang/lib/AST/NestedNameSpecifier.cpp"
, 82, __PRETTY_FUNCTION__))
80 (Prefix->getAsType() == nullptr &&(((!Prefix || (Prefix->getAsType() == nullptr && Prefix
->getAsIdentifier() == nullptr)) && "Broken nested name specifier"
) ? static_cast<void> (0) : __assert_fail ("(!Prefix || (Prefix->getAsType() == nullptr && Prefix->getAsIdentifier() == nullptr)) && \"Broken nested name specifier\""
, "/build/llvm-toolchain-snapshot-6.0~svn315928/tools/clang/lib/AST/NestedNameSpecifier.cpp"
, 82, __PRETTY_FUNCTION__))
81 Prefix->getAsIdentifier() == nullptr)) &&(((!Prefix || (Prefix->getAsType() == nullptr && Prefix
->getAsIdentifier() == nullptr)) && "Broken nested name specifier"
) ? static_cast<void> (0) : __assert_fail ("(!Prefix || (Prefix->getAsType() == nullptr && Prefix->getAsIdentifier() == nullptr)) && \"Broken nested name specifier\""
, "/build/llvm-toolchain-snapshot-6.0~svn315928/tools/clang/lib/AST/NestedNameSpecifier.cpp"
, 82, __PRETTY_FUNCTION__))
82 "Broken nested name specifier")(((!Prefix || (Prefix->getAsType() == nullptr && Prefix
->getAsIdentifier() == nullptr)) && "Broken nested name specifier"
) ? static_cast<void> (0) : __assert_fail ("(!Prefix || (Prefix->getAsType() == nullptr && Prefix->getAsIdentifier() == nullptr)) && \"Broken nested name specifier\""
, "/build/llvm-toolchain-snapshot-6.0~svn315928/tools/clang/lib/AST/NestedNameSpecifier.cpp"
, 82, __PRETTY_FUNCTION__))
;
83 NestedNameSpecifier Mockup;
84 Mockup.Prefix.setPointer(Prefix);
85 Mockup.Prefix.setInt(StoredDecl);
86 Mockup.Specifier = Alias;
87 return FindOrInsert(Context, Mockup);
88}
89
90NestedNameSpecifier *
91NestedNameSpecifier::Create(const ASTContext &Context,
92 NestedNameSpecifier *Prefix,
93 bool Template, const Type *T) {
94 assert(T && "Type cannot be NULL")((T && "Type cannot be NULL") ? static_cast<void>
(0) : __assert_fail ("T && \"Type cannot be NULL\"",
"/build/llvm-toolchain-snapshot-6.0~svn315928/tools/clang/lib/AST/NestedNameSpecifier.cpp"
, 94, __PRETTY_FUNCTION__))
;
95 NestedNameSpecifier Mockup;
96 Mockup.Prefix.setPointer(Prefix);
97 Mockup.Prefix.setInt(Template? StoredTypeSpecWithTemplate : StoredTypeSpec);
98 Mockup.Specifier = const_cast<Type*>(T);
99 return FindOrInsert(Context, Mockup);
100}
101
102NestedNameSpecifier *
103NestedNameSpecifier::Create(const ASTContext &Context, IdentifierInfo *II) {
104 assert(II && "Identifier cannot be NULL")((II && "Identifier cannot be NULL") ? static_cast<
void> (0) : __assert_fail ("II && \"Identifier cannot be NULL\""
, "/build/llvm-toolchain-snapshot-6.0~svn315928/tools/clang/lib/AST/NestedNameSpecifier.cpp"
, 104, __PRETTY_FUNCTION__))
;
105 NestedNameSpecifier Mockup;
106 Mockup.Prefix.setPointer(nullptr);
107 Mockup.Prefix.setInt(StoredIdentifier);
108 Mockup.Specifier = II;
109 return FindOrInsert(Context, Mockup);
110}
111
112NestedNameSpecifier *
113NestedNameSpecifier::GlobalSpecifier(const ASTContext &Context) {
114 if (!Context.GlobalNestedNameSpecifier)
115 Context.GlobalNestedNameSpecifier =
116 new (Context, alignof(NestedNameSpecifier)) NestedNameSpecifier();
117 return Context.GlobalNestedNameSpecifier;
118}
119
120NestedNameSpecifier *
121NestedNameSpecifier::SuperSpecifier(const ASTContext &Context,
122 CXXRecordDecl *RD) {
123 NestedNameSpecifier Mockup;
124 Mockup.Prefix.setPointer(nullptr);
125 Mockup.Prefix.setInt(StoredDecl);
126 Mockup.Specifier = RD;
127 return FindOrInsert(Context, Mockup);
128}
129
130NestedNameSpecifier::SpecifierKind NestedNameSpecifier::getKind() const {
131 if (!Specifier)
132 return Global;
133
134 switch (Prefix.getInt()) {
135 case StoredIdentifier:
136 return Identifier;
137
138 case StoredDecl: {
139 NamedDecl *ND = static_cast<NamedDecl *>(Specifier);
140 if (isa<CXXRecordDecl>(ND))
141 return Super;
142 return isa<NamespaceDecl>(ND) ? Namespace : NamespaceAlias;
143 }
144
145 case StoredTypeSpec:
146 return TypeSpec;
147
148 case StoredTypeSpecWithTemplate:
149 return TypeSpecWithTemplate;
150 }
151
152 llvm_unreachable("Invalid NNS Kind!")::llvm::llvm_unreachable_internal("Invalid NNS Kind!", "/build/llvm-toolchain-snapshot-6.0~svn315928/tools/clang/lib/AST/NestedNameSpecifier.cpp"
, 152)
;
153}
154
155/// \brief Retrieve the namespace stored in this nested name specifier.
156NamespaceDecl *NestedNameSpecifier::getAsNamespace() const {
157 if (Prefix.getInt() == StoredDecl)
158 return dyn_cast<NamespaceDecl>(static_cast<NamedDecl *>(Specifier));
159
160 return nullptr;
161}
162
163/// \brief Retrieve the namespace alias stored in this nested name specifier.
164NamespaceAliasDecl *NestedNameSpecifier::getAsNamespaceAlias() const {
165 if (Prefix.getInt() == StoredDecl)
166 return dyn_cast<NamespaceAliasDecl>(static_cast<NamedDecl *>(Specifier));
167
168 return nullptr;
169}
170
171/// \brief Retrieve the record declaration stored in this nested name specifier.
172CXXRecordDecl *NestedNameSpecifier::getAsRecordDecl() const {
173 switch (Prefix.getInt()) {
174 case StoredIdentifier:
175 return nullptr;
176
177 case StoredDecl:
178 return dyn_cast<CXXRecordDecl>(static_cast<NamedDecl *>(Specifier));
179
180 case StoredTypeSpec:
181 case StoredTypeSpecWithTemplate:
182 return getAsType()->getAsCXXRecordDecl();
183 }
184
185 llvm_unreachable("Invalid NNS Kind!")::llvm::llvm_unreachable_internal("Invalid NNS Kind!", "/build/llvm-toolchain-snapshot-6.0~svn315928/tools/clang/lib/AST/NestedNameSpecifier.cpp"
, 185)
;
186}
187
188/// \brief Whether this nested name specifier refers to a dependent
189/// type or not.
190bool NestedNameSpecifier::isDependent() const {
191 switch (getKind()) {
192 case Identifier:
193 // Identifier specifiers always represent dependent types
194 return true;
195
196 case Namespace:
197 case NamespaceAlias:
198 case Global:
199 return false;
200
201 case Super: {
202 CXXRecordDecl *RD = static_cast<CXXRecordDecl *>(Specifier);
203 for (const auto &Base : RD->bases())
204 if (Base.getType()->isDependentType())
205 return true;
206
207 return false;
208 }
209
210 case TypeSpec:
211 case TypeSpecWithTemplate:
212 return getAsType()->isDependentType();
213 }
214
215 llvm_unreachable("Invalid NNS Kind!")::llvm::llvm_unreachable_internal("Invalid NNS Kind!", "/build/llvm-toolchain-snapshot-6.0~svn315928/tools/clang/lib/AST/NestedNameSpecifier.cpp"
, 215)
;
216}
217
218/// \brief Whether this nested name specifier refers to a dependent
219/// type or not.
220bool NestedNameSpecifier::isInstantiationDependent() const {
221 switch (getKind()) {
222 case Identifier:
223 // Identifier specifiers always represent dependent types
224 return true;
225
226 case Namespace:
227 case NamespaceAlias:
228 case Global:
229 case Super:
230 return false;
231
232 case TypeSpec:
233 case TypeSpecWithTemplate:
234 return getAsType()->isInstantiationDependentType();
235 }
236
237 llvm_unreachable("Invalid NNS Kind!")::llvm::llvm_unreachable_internal("Invalid NNS Kind!", "/build/llvm-toolchain-snapshot-6.0~svn315928/tools/clang/lib/AST/NestedNameSpecifier.cpp"
, 237)
;
238}
239
240bool NestedNameSpecifier::containsUnexpandedParameterPack() const {
241 switch (getKind()) {
242 case Identifier:
243 return getPrefix() && getPrefix()->containsUnexpandedParameterPack();
244
245 case Namespace:
246 case NamespaceAlias:
247 case Global:
248 case Super:
249 return false;
250
251 case TypeSpec:
252 case TypeSpecWithTemplate:
253 return getAsType()->containsUnexpandedParameterPack();
254 }
255
256 llvm_unreachable("Invalid NNS Kind!")::llvm::llvm_unreachable_internal("Invalid NNS Kind!", "/build/llvm-toolchain-snapshot-6.0~svn315928/tools/clang/lib/AST/NestedNameSpecifier.cpp"
, 256)
;
257}
258
259/// \brief Print this nested name specifier to the given output
260/// stream.
261void
262NestedNameSpecifier::print(raw_ostream &OS,
263 const PrintingPolicy &Policy) const {
264 if (getPrefix())
265 getPrefix()->print(OS, Policy);
266
267 switch (getKind()) {
268 case Identifier:
269 OS << getAsIdentifier()->getName();
270 break;
271
272 case Namespace:
273 if (getAsNamespace()->isAnonymousNamespace())
274 return;
275
276 OS << getAsNamespace()->getName();
277 break;
278
279 case NamespaceAlias:
280 OS << getAsNamespaceAlias()->getName();
281 break;
282
283 case Global:
284 break;
285
286 case Super:
287 OS << "__super";
288 break;
289
290 case TypeSpecWithTemplate:
291 OS << "template ";
292 // Fall through to print the type.
293 LLVM_FALLTHROUGH[[clang::fallthrough]];
294
295 case TypeSpec: {
296 const Type *T = getAsType();
297
298 PrintingPolicy InnerPolicy(Policy);
299 InnerPolicy.SuppressScope = true;
300
301 // Nested-name-specifiers are intended to contain minimally-qualified
302 // types. An actual ElaboratedType will not occur, since we'll store
303 // just the type that is referred to in the nested-name-specifier (e.g.,
304 // a TypedefType, TagType, etc.). However, when we are dealing with
305 // dependent template-id types (e.g., Outer<T>::template Inner<U>),
306 // the type requires its own nested-name-specifier for uniqueness, so we
307 // suppress that nested-name-specifier during printing.
308 assert(!isa<ElaboratedType>(T) &&((!isa<ElaboratedType>(T) && "Elaborated type in nested-name-specifier"
) ? static_cast<void> (0) : __assert_fail ("!isa<ElaboratedType>(T) && \"Elaborated type in nested-name-specifier\""
, "/build/llvm-toolchain-snapshot-6.0~svn315928/tools/clang/lib/AST/NestedNameSpecifier.cpp"
, 309, __PRETTY_FUNCTION__))
309 "Elaborated type in nested-name-specifier")((!isa<ElaboratedType>(T) && "Elaborated type in nested-name-specifier"
) ? static_cast<void> (0) : __assert_fail ("!isa<ElaboratedType>(T) && \"Elaborated type in nested-name-specifier\""
, "/build/llvm-toolchain-snapshot-6.0~svn315928/tools/clang/lib/AST/NestedNameSpecifier.cpp"
, 309, __PRETTY_FUNCTION__))
;
310 if (const TemplateSpecializationType *SpecType
311 = dyn_cast<TemplateSpecializationType>(T)) {
312 // Print the template name without its corresponding
313 // nested-name-specifier.
314 SpecType->getTemplateName().print(OS, InnerPolicy, true);
315
316 // Print the template argument list.
317 TemplateSpecializationType::PrintTemplateArgumentList(
318 OS, SpecType->template_arguments(), InnerPolicy);
319 } else {
320 // Print the type normally
321 QualType(T, 0).print(OS, InnerPolicy);
322 }
323 break;
324 }
325 }
326
327 OS << "::";
328}
329
330void NestedNameSpecifier::dump(const LangOptions &LO) const {
331 print(llvm::errs(), PrintingPolicy(LO));
332}
333
334LLVM_DUMP_METHOD__attribute__((noinline)) __attribute__((__used__)) void NestedNameSpecifier::dump() const {
335 LangOptions LO;
336 print(llvm::errs(), PrintingPolicy(LO));
337}
338
339unsigned
340NestedNameSpecifierLoc::getLocalDataLength(NestedNameSpecifier *Qualifier) {
341 assert(Qualifier && "Expected a non-NULL qualifier")((Qualifier && "Expected a non-NULL qualifier") ? static_cast
<void> (0) : __assert_fail ("Qualifier && \"Expected a non-NULL qualifier\""
, "/build/llvm-toolchain-snapshot-6.0~svn315928/tools/clang/lib/AST/NestedNameSpecifier.cpp"
, 341, __PRETTY_FUNCTION__))
;
342
343 // Location of the trailing '::'.
344 unsigned Length = sizeof(unsigned);
345
346 switch (Qualifier->getKind()) {
347 case NestedNameSpecifier::Global:
348 // Nothing more to add.
349 break;
350
351 case NestedNameSpecifier::Identifier:
352 case NestedNameSpecifier::Namespace:
353 case NestedNameSpecifier::NamespaceAlias:
354 case NestedNameSpecifier::Super:
355 // The location of the identifier or namespace name.
356 Length += sizeof(unsigned);
357 break;
358
359 case NestedNameSpecifier::TypeSpecWithTemplate:
360 case NestedNameSpecifier::TypeSpec:
361 // The "void*" that points at the TypeLoc data.
362 // Note: the 'template' keyword is part of the TypeLoc.
363 Length += sizeof(void *);
364 break;
365 }
366
367 return Length;
368}
369
370unsigned
371NestedNameSpecifierLoc::getDataLength(NestedNameSpecifier *Qualifier) {
372 unsigned Length = 0;
373 for (; Qualifier; Qualifier = Qualifier->getPrefix())
374 Length += getLocalDataLength(Qualifier);
375 return Length;
376}
377
378namespace {
379 /// \brief Load a (possibly unaligned) source location from a given address
380 /// and offset.
381 SourceLocation LoadSourceLocation(void *Data, unsigned Offset) {
382 unsigned Raw;
383 memcpy(&Raw, static_cast<char *>(Data) + Offset, sizeof(unsigned));
384 return SourceLocation::getFromRawEncoding(Raw);
385 }
386
387 /// \brief Load a (possibly unaligned) pointer from a given address and
388 /// offset.
389 void *LoadPointer(void *Data, unsigned Offset) {
390 void *Result;
391 memcpy(&Result, static_cast<char *>(Data) + Offset, sizeof(void*));
392 return Result;
393 }
394}
395
396SourceRange NestedNameSpecifierLoc::getSourceRange() const {
397 if (!Qualifier)
398 return SourceRange();
399
400 NestedNameSpecifierLoc First = *this;
401 while (NestedNameSpecifierLoc Prefix = First.getPrefix())
402 First = Prefix;
403
404 return SourceRange(First.getLocalSourceRange().getBegin(),
405 getLocalSourceRange().getEnd());
406}
407
408SourceRange NestedNameSpecifierLoc::getLocalSourceRange() const {
409 if (!Qualifier)
410 return SourceRange();
411
412 unsigned Offset = getDataLength(Qualifier->getPrefix());
413 switch (Qualifier->getKind()) {
414 case NestedNameSpecifier::Global:
415 return LoadSourceLocation(Data, Offset);
416
417 case NestedNameSpecifier::Identifier:
418 case NestedNameSpecifier::Namespace:
419 case NestedNameSpecifier::NamespaceAlias:
420 case NestedNameSpecifier::Super:
421 return SourceRange(LoadSourceLocation(Data, Offset),
422 LoadSourceLocation(Data, Offset + sizeof(unsigned)));
423
424 case NestedNameSpecifier::TypeSpecWithTemplate:
425 case NestedNameSpecifier::TypeSpec: {
426 // The "void*" that points at the TypeLoc data.
427 // Note: the 'template' keyword is part of the TypeLoc.
428 void *TypeData = LoadPointer(Data, Offset);
429 TypeLoc TL(Qualifier->getAsType(), TypeData);
430 return SourceRange(TL.getBeginLoc(),
431 LoadSourceLocation(Data, Offset + sizeof(void*)));
432 }
433 }
434
435 llvm_unreachable("Invalid NNS Kind!")::llvm::llvm_unreachable_internal("Invalid NNS Kind!", "/build/llvm-toolchain-snapshot-6.0~svn315928/tools/clang/lib/AST/NestedNameSpecifier.cpp"
, 435)
;
436}
437
438TypeLoc NestedNameSpecifierLoc::getTypeLoc() const {
439 assert((Qualifier->getKind() == NestedNameSpecifier::TypeSpec ||(((Qualifier->getKind() == NestedNameSpecifier::TypeSpec ||
Qualifier->getKind() == NestedNameSpecifier::TypeSpecWithTemplate
) && "Nested-name-specifier location is not a type") ?
static_cast<void> (0) : __assert_fail ("(Qualifier->getKind() == NestedNameSpecifier::TypeSpec || Qualifier->getKind() == NestedNameSpecifier::TypeSpecWithTemplate) && \"Nested-name-specifier location is not a type\""
, "/build/llvm-toolchain-snapshot-6.0~svn315928/tools/clang/lib/AST/NestedNameSpecifier.cpp"
, 441, __PRETTY_FUNCTION__))
440 Qualifier->getKind() == NestedNameSpecifier::TypeSpecWithTemplate) &&(((Qualifier->getKind() == NestedNameSpecifier::TypeSpec ||
Qualifier->getKind() == NestedNameSpecifier::TypeSpecWithTemplate
) && "Nested-name-specifier location is not a type") ?
static_cast<void> (0) : __assert_fail ("(Qualifier->getKind() == NestedNameSpecifier::TypeSpec || Qualifier->getKind() == NestedNameSpecifier::TypeSpecWithTemplate) && \"Nested-name-specifier location is not a type\""
, "/build/llvm-toolchain-snapshot-6.0~svn315928/tools/clang/lib/AST/NestedNameSpecifier.cpp"
, 441, __PRETTY_FUNCTION__))
441 "Nested-name-specifier location is not a type")(((Qualifier->getKind() == NestedNameSpecifier::TypeSpec ||
Qualifier->getKind() == NestedNameSpecifier::TypeSpecWithTemplate
) && "Nested-name-specifier location is not a type") ?
static_cast<void> (0) : __assert_fail ("(Qualifier->getKind() == NestedNameSpecifier::TypeSpec || Qualifier->getKind() == NestedNameSpecifier::TypeSpecWithTemplate) && \"Nested-name-specifier location is not a type\""
, "/build/llvm-toolchain-snapshot-6.0~svn315928/tools/clang/lib/AST/NestedNameSpecifier.cpp"
, 441, __PRETTY_FUNCTION__))
;
442
443 // The "void*" that points at the TypeLoc data.
444 unsigned Offset = getDataLength(Qualifier->getPrefix());
445 void *TypeData = LoadPointer(Data, Offset);
446 return TypeLoc(Qualifier->getAsType(), TypeData);
447}
448
449namespace {
450 void Append(char *Start, char *End, char *&Buffer, unsigned &BufferSize,
451 unsigned &BufferCapacity) {
452 if (Start == End)
6
Taking false branch
453 return;
454
455 if (BufferSize + (End - Start) > BufferCapacity) {
7
Taking false branch
456 // Reallocate the buffer.
457 unsigned NewCapacity = std::max(
458 (unsigned)(BufferCapacity ? BufferCapacity * 2 : sizeof(void *) * 2),
459 (unsigned)(BufferSize + (End - Start)));
460 char *NewBuffer = static_cast<char *>(malloc(NewCapacity));
461 if (BufferCapacity) {
462 memcpy(NewBuffer, Buffer, BufferSize);
463 free(Buffer);
464 }
465 Buffer = NewBuffer;
466 BufferCapacity = NewCapacity;
467 }
468
469 memcpy(Buffer + BufferSize, Start, End - Start);
8
Null pointer passed as an argument to a 'nonnull' parameter
470 BufferSize += End-Start;
471 }
472
473 /// \brief Save a source location to the given buffer.
474 void SaveSourceLocation(SourceLocation Loc, char *&Buffer,
475 unsigned &BufferSize, unsigned &BufferCapacity) {
476 unsigned Raw = Loc.getRawEncoding();
477 Append(reinterpret_cast<char *>(&Raw),
478 reinterpret_cast<char *>(&Raw) + sizeof(unsigned),
479 Buffer, BufferSize, BufferCapacity);
480 }
481
482 /// \brief Save a pointer to the given buffer.
483 void SavePointer(void *Ptr, char *&Buffer, unsigned &BufferSize,
484 unsigned &BufferCapacity) {
485 Append(reinterpret_cast<char *>(&Ptr),
486 reinterpret_cast<char *>(&Ptr) + sizeof(void *),
487 Buffer, BufferSize, BufferCapacity);
488 }
489}
490
491NestedNameSpecifierLocBuilder::
492NestedNameSpecifierLocBuilder(const NestedNameSpecifierLocBuilder &Other)
493 : Representation(Other.Representation), Buffer(nullptr),
494 BufferSize(0), BufferCapacity(0)
495{
496 if (!Other.Buffer)
1
Assuming the condition is false
2
Taking false branch
497 return;
498
499 if (Other.BufferCapacity == 0) {
3
Assuming the condition is false
4
Taking false branch
500 // Shallow copy is okay.
501 Buffer = Other.Buffer;
502 BufferSize = Other.BufferSize;
503 return;
504 }
505
506 // Deep copy
507 Append(Other.Buffer, Other.Buffer + Other.BufferSize, Buffer, BufferSize,
5
Calling 'Append'
508 BufferCapacity);
509}
510
511NestedNameSpecifierLocBuilder &
512NestedNameSpecifierLocBuilder::
513operator=(const NestedNameSpecifierLocBuilder &Other) {
514 Representation = Other.Representation;
515
516 if (Buffer && Other.Buffer && BufferCapacity >= Other.BufferSize) {
517 // Re-use our storage.
518 BufferSize = Other.BufferSize;
519 memcpy(Buffer, Other.Buffer, BufferSize);
520 return *this;
521 }
522
523 // Free our storage, if we have any.
524 if (BufferCapacity) {
525 free(Buffer);
526 BufferCapacity = 0;
527 }
528
529 if (!Other.Buffer) {
530 // Empty.
531 Buffer = nullptr;
532 BufferSize = 0;
533 return *this;
534 }
535
536 if (Other.BufferCapacity == 0) {
537 // Shallow copy is okay.
538 Buffer = Other.Buffer;
539 BufferSize = Other.BufferSize;
540 return *this;
541 }
542
543 // Deep copy.
544 Append(Other.Buffer, Other.Buffer + Other.BufferSize, Buffer, BufferSize,
545 BufferCapacity);
546 return *this;
547}
548
549void NestedNameSpecifierLocBuilder::Extend(ASTContext &Context,
550 SourceLocation TemplateKWLoc,
551 TypeLoc TL,
552 SourceLocation ColonColonLoc) {
553 Representation = NestedNameSpecifier::Create(Context, Representation,
554 TemplateKWLoc.isValid(),
555 TL.getTypePtr());
556
557 // Push source-location info into the buffer.
558 SavePointer(TL.getOpaqueData(), Buffer, BufferSize, BufferCapacity);
559 SaveSourceLocation(ColonColonLoc, Buffer, BufferSize, BufferCapacity);
560}
561
562void NestedNameSpecifierLocBuilder::Extend(ASTContext &Context,
563 IdentifierInfo *Identifier,
564 SourceLocation IdentifierLoc,
565 SourceLocation ColonColonLoc) {
566 Representation = NestedNameSpecifier::Create(Context, Representation,
567 Identifier);
568
569 // Push source-location info into the buffer.
570 SaveSourceLocation(IdentifierLoc, Buffer, BufferSize, BufferCapacity);
571 SaveSourceLocation(ColonColonLoc, Buffer, BufferSize, BufferCapacity);
572}
573
574void NestedNameSpecifierLocBuilder::Extend(ASTContext &Context,
575 NamespaceDecl *Namespace,
576 SourceLocation NamespaceLoc,
577 SourceLocation ColonColonLoc) {
578 Representation = NestedNameSpecifier::Create(Context, Representation,
579 Namespace);
580
581 // Push source-location info into the buffer.
582 SaveSourceLocation(NamespaceLoc, Buffer, BufferSize, BufferCapacity);
583 SaveSourceLocation(ColonColonLoc, Buffer, BufferSize, BufferCapacity);
584}
585
586void NestedNameSpecifierLocBuilder::Extend(ASTContext &Context,
587 NamespaceAliasDecl *Alias,
588 SourceLocation AliasLoc,
589 SourceLocation ColonColonLoc) {
590 Representation = NestedNameSpecifier::Create(Context, Representation, Alias);
591
592 // Push source-location info into the buffer.
593 SaveSourceLocation(AliasLoc, Buffer, BufferSize, BufferCapacity);
594 SaveSourceLocation(ColonColonLoc, Buffer, BufferSize, BufferCapacity);
595}
596
597void NestedNameSpecifierLocBuilder::MakeGlobal(ASTContext &Context,
598 SourceLocation ColonColonLoc) {
599 assert(!Representation && "Already have a nested-name-specifier!?")((!Representation && "Already have a nested-name-specifier!?"
) ? static_cast<void> (0) : __assert_fail ("!Representation && \"Already have a nested-name-specifier!?\""
, "/build/llvm-toolchain-snapshot-6.0~svn315928/tools/clang/lib/AST/NestedNameSpecifier.cpp"
, 599, __PRETTY_FUNCTION__))
;
600 Representation = NestedNameSpecifier::GlobalSpecifier(Context);
601
602 // Push source-location info into the buffer.
603 SaveSourceLocation(ColonColonLoc, Buffer, BufferSize, BufferCapacity);
604}
605
606void NestedNameSpecifierLocBuilder::MakeSuper(ASTContext &Context,
607 CXXRecordDecl *RD,
608 SourceLocation SuperLoc,
609 SourceLocation ColonColonLoc) {
610 Representation = NestedNameSpecifier::SuperSpecifier(Context, RD);
611
612 // Push source-location info into the buffer.
613 SaveSourceLocation(SuperLoc, Buffer, BufferSize, BufferCapacity);
614 SaveSourceLocation(ColonColonLoc, Buffer, BufferSize, BufferCapacity);
615}
616
617void NestedNameSpecifierLocBuilder::MakeTrivial(ASTContext &Context,
618 NestedNameSpecifier *Qualifier,
619 SourceRange R) {
620 Representation = Qualifier;
621
622 // Construct bogus (but well-formed) source information for the
623 // nested-name-specifier.
624 BufferSize = 0;
625 SmallVector<NestedNameSpecifier *, 4> Stack;
626 for (NestedNameSpecifier *NNS = Qualifier; NNS; NNS = NNS->getPrefix())
627 Stack.push_back(NNS);
628 while (!Stack.empty()) {
629 NestedNameSpecifier *NNS = Stack.pop_back_val();
630 switch (NNS->getKind()) {
631 case NestedNameSpecifier::Identifier:
632 case NestedNameSpecifier::Namespace:
633 case NestedNameSpecifier::NamespaceAlias:
634 SaveSourceLocation(R.getBegin(), Buffer, BufferSize, BufferCapacity);
635 break;
636
637 case NestedNameSpecifier::TypeSpec:
638 case NestedNameSpecifier::TypeSpecWithTemplate: {
639 TypeSourceInfo *TSInfo
640 = Context.getTrivialTypeSourceInfo(QualType(NNS->getAsType(), 0),
641 R.getBegin());
642 SavePointer(TSInfo->getTypeLoc().getOpaqueData(), Buffer, BufferSize,
643 BufferCapacity);
644 break;
645 }
646
647 case NestedNameSpecifier::Global:
648 case NestedNameSpecifier::Super:
649 break;
650 }
651
652 // Save the location of the '::'.
653 SaveSourceLocation(Stack.empty()? R.getEnd() : R.getBegin(),
654 Buffer, BufferSize, BufferCapacity);
655 }
656}
657
658void NestedNameSpecifierLocBuilder::Adopt(NestedNameSpecifierLoc Other) {
659 if (BufferCapacity)
660 free(Buffer);
661
662 if (!Other) {
663 Representation = nullptr;
664 BufferSize = 0;
665 return;
666 }
667
668 // Rather than copying the data (which is wasteful), "adopt" the
669 // pointer (which points into the ASTContext) but set the capacity to zero to
670 // indicate that we don't own it.
671 Representation = Other.getNestedNameSpecifier();
672 Buffer = static_cast<char *>(Other.getOpaqueData());
673 BufferSize = Other.getDataLength();
674 BufferCapacity = 0;
675}
676
677NestedNameSpecifierLoc
678NestedNameSpecifierLocBuilder::getWithLocInContext(ASTContext &Context) const {
679 if (!Representation)
680 return NestedNameSpecifierLoc();
681
682 // If we adopted our data pointer from elsewhere in the AST context, there's
683 // no need to copy the memory.
684 if (BufferCapacity == 0)
685 return NestedNameSpecifierLoc(Representation, Buffer);
686
687 // FIXME: After copying the source-location information, should we free
688 // our (temporary) buffer and adopt the ASTContext-allocated memory?
689 // Doing so would optimize repeated calls to getWithLocInContext().
690 void *Mem = Context.Allocate(BufferSize, alignof(void *));
691 memcpy(Mem, Buffer, BufferSize);
692 return NestedNameSpecifierLoc(Representation, Mem);
693}