Bug Summary

File:tools/lldb/source/Plugins/SymbolFile/DWARF/DWARFASTParserClang.cpp
Warning:line 383, column 15
Null pointer passed as an argument to a 'nonnull' parameter

Annotated Source Code

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clang -cc1 -triple x86_64-pc-linux-gnu -analyze -disable-free -disable-llvm-verifier -discard-value-names -main-file-name DWARFASTParserClang.cpp -analyzer-store=region -analyzer-opt-analyze-nested-blocks -analyzer-eagerly-assume -analyzer-checker=core -analyzer-checker=apiModeling -analyzer-checker=unix -analyzer-checker=deadcode -analyzer-checker=cplusplus -analyzer-checker=security.insecureAPI.UncheckedReturn -analyzer-checker=security.insecureAPI.getpw -analyzer-checker=security.insecureAPI.gets -analyzer-checker=security.insecureAPI.mktemp -analyzer-checker=security.insecureAPI.mkstemp -analyzer-checker=security.insecureAPI.vfork -analyzer-checker=nullability.NullPassedToNonnull -analyzer-checker=nullability.NullReturnedFromNonnull -analyzer-output plist -w -mrelocation-model pic -pic-level 2 -mthread-model posix -fmath-errno -masm-verbose -mconstructor-aliases -munwind-tables -fuse-init-array -target-cpu x86-64 -dwarf-column-info -debugger-tuning=gdb -momit-leaf-frame-pointer -ffunction-sections -fdata-sections -resource-dir /usr/lib/llvm-7/lib/clang/7.0.0 -D HAVE_ROUND -D LLDB_CONFIGURATION_RELEASE -D _DEBUG -D _GNU_SOURCE -D __STDC_CONSTANT_MACROS -D __STDC_FORMAT_MACROS -D __STDC_LIMIT_MACROS -I /build/llvm-toolchain-snapshot-7~svn338205/build-llvm/tools/lldb/source/Plugins/SymbolFile/DWARF -I /build/llvm-toolchain-snapshot-7~svn338205/tools/lldb/source/Plugins/SymbolFile/DWARF -I /build/llvm-toolchain-snapshot-7~svn338205/build-llvm/tools/lldb/include -I /build/llvm-toolchain-snapshot-7~svn338205/tools/lldb/include -I /build/llvm-toolchain-snapshot-7~svn338205/build-llvm/include -I /build/llvm-toolchain-snapshot-7~svn338205/include -I /usr/include/python2.7 -I /build/llvm-toolchain-snapshot-7~svn338205/tools/clang/include -I /build/llvm-toolchain-snapshot-7~svn338205/build-llvm/tools/lldb/../clang/include -I /build/llvm-toolchain-snapshot-7~svn338205/tools/lldb/source/. -U NDEBUG -internal-isystem /usr/lib/gcc/x86_64-linux-gnu/8/../../../../include/c++/8 -internal-isystem /usr/lib/gcc/x86_64-linux-gnu/8/../../../../include/x86_64-linux-gnu/c++/8 -internal-isystem /usr/lib/gcc/x86_64-linux-gnu/8/../../../../include/x86_64-linux-gnu/c++/8 -internal-isystem /usr/lib/gcc/x86_64-linux-gnu/8/../../../../include/c++/8/backward -internal-isystem /usr/include/clang/7.0.0/include/ -internal-isystem /usr/local/include -internal-isystem /usr/lib/llvm-7/lib/clang/7.0.0/include -internal-externc-isystem /usr/lib/gcc/x86_64-linux-gnu/8/include -internal-externc-isystem /usr/include/x86_64-linux-gnu -internal-externc-isystem /include -internal-externc-isystem /usr/include -O2 -Wno-unused-parameter -Wwrite-strings -Wno-missing-field-initializers -Wno-long-long -Wno-maybe-uninitialized -Wno-class-memaccess -Wno-comment -Wno-deprecated-declarations -Wno-unknown-pragmas -Wno-strict-aliasing -Wno-deprecated-register -Wno-vla-extension -std=c++11 -fdeprecated-macro -fdebug-compilation-dir /build/llvm-toolchain-snapshot-7~svn338205/build-llvm/tools/lldb/source/Plugins/SymbolFile/DWARF -ferror-limit 19 -fmessage-length 0 -fvisibility-inlines-hidden -fobjc-runtime=gcc -fdiagnostics-show-option -vectorize-loops -vectorize-slp -analyzer-output=html -analyzer-config stable-report-filename=true -o /tmp/scan-build-2018-07-29-043837-17923-1 -x c++ /build/llvm-toolchain-snapshot-7~svn338205/tools/lldb/source/Plugins/SymbolFile/DWARF/DWARFASTParserClang.cpp -faddrsig
1//===-- DWARFASTParserClang.cpp ---------------------------------*- 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#include <stdlib.h>
11
12#include "DWARFASTParserClang.h"
13#include "DWARFDIE.h"
14#include "DWARFDIECollection.h"
15#include "DWARFDebugInfo.h"
16#include "DWARFDeclContext.h"
17#include "DWARFDefines.h"
18#include "SymbolFileDWARF.h"
19#include "SymbolFileDWARFDwo.h"
20#include "SymbolFileDWARFDebugMap.h"
21#include "UniqueDWARFASTType.h"
22
23#include "Plugins/Language/ObjC/ObjCLanguage.h"
24#include "lldb/Core/Module.h"
25#include "lldb/Core/Value.h"
26#include "lldb/Host/Host.h"
27#include "lldb/Symbol/ClangASTImporter.h"
28#include "lldb/Symbol/ClangExternalASTSourceCommon.h"
29#include "lldb/Symbol/ClangUtil.h"
30#include "lldb/Symbol/CompileUnit.h"
31#include "lldb/Symbol/Function.h"
32#include "lldb/Symbol/ObjectFile.h"
33#include "lldb/Symbol/SymbolVendor.h"
34#include "lldb/Symbol/TypeList.h"
35#include "lldb/Symbol/TypeMap.h"
36#include "lldb/Target/Language.h"
37#include "lldb/Utility/LLDBAssert.h"
38#include "lldb/Utility/Log.h"
39#include "lldb/Utility/StreamString.h"
40
41#include "clang/AST/CXXInheritance.h"
42#include "clang/AST/DeclCXX.h"
43#include "clang/AST/DeclObjC.h"
44#include "clang/AST/DeclTemplate.h"
45
46#include <map>
47#include <vector>
48
49//#define ENABLE_DEBUG_PRINTF // COMMENT OUT THIS LINE PRIOR TO CHECKIN
50
51#ifdef ENABLE_DEBUG_PRINTF
52#include <stdio.h>
53#define DEBUG_PRINTF(fmt, ...) printf(fmt, __VA_ARGS__)
54#else
55#define DEBUG_PRINTF(fmt, ...)
56#endif
57
58using namespace lldb;
59using namespace lldb_private;
60DWARFASTParserClang::DWARFASTParserClang(ClangASTContext &ast)
61 : m_ast(ast), m_die_to_decl_ctx(), m_decl_ctx_to_die() {}
62
63DWARFASTParserClang::~DWARFASTParserClang() {}
64
65static AccessType DW_ACCESS_to_AccessType(uint32_t dwarf_accessibility) {
66 switch (dwarf_accessibility) {
67 case DW_ACCESS_public:
68 return eAccessPublic;
69 case DW_ACCESS_private:
70 return eAccessPrivate;
71 case DW_ACCESS_protected:
72 return eAccessProtected;
73 default:
74 break;
75 }
76 return eAccessNone;
77}
78
79static bool DeclKindIsCXXClass(clang::Decl::Kind decl_kind) {
80 switch (decl_kind) {
81 case clang::Decl::CXXRecord:
82 case clang::Decl::ClassTemplateSpecialization:
83 return true;
84 default:
85 break;
86 }
87 return false;
88}
89
90struct BitfieldInfo {
91 uint64_t bit_size;
92 uint64_t bit_offset;
93
94 BitfieldInfo()
95 : bit_size(LLDB_INVALID_ADDRESS(18446744073709551615UL)), bit_offset(LLDB_INVALID_ADDRESS(18446744073709551615UL)) {}
96
97 void Clear() {
98 bit_size = LLDB_INVALID_ADDRESS(18446744073709551615UL);
99 bit_offset = LLDB_INVALID_ADDRESS(18446744073709551615UL);
100 }
101
102 bool IsValid() const {
103 return (bit_size != LLDB_INVALID_ADDRESS(18446744073709551615UL)) &&
104 (bit_offset != LLDB_INVALID_ADDRESS(18446744073709551615UL));
105 }
106
107 bool NextBitfieldOffsetIsValid(const uint64_t next_bit_offset) const {
108 if (IsValid()) {
109 // This bitfield info is valid, so any subsequent bitfields must not
110 // overlap and must be at a higher bit offset than any previous bitfield
111 // + size.
112 return (bit_size + bit_offset) <= next_bit_offset;
113 } else {
114 // If the this BitfieldInfo is not valid, then any offset isOK
115 return true;
116 }
117 }
118};
119
120ClangASTImporter &DWARFASTParserClang::GetClangASTImporter() {
121 if (!m_clang_ast_importer_ap) {
122 m_clang_ast_importer_ap.reset(new ClangASTImporter);
123 }
124 return *m_clang_ast_importer_ap;
125}
126
127/// Detect a forward declaration that is nested in a DW_TAG_module.
128static bool isClangModuleFwdDecl(const DWARFDIE &Die) {
129 if (!Die.GetAttributeValueAsUnsigned(DW_AT_declaration, 0))
130 return false;
131 auto Parent = Die.GetParent();
132 while (Parent.IsValid()) {
133 if (Parent.Tag() == DW_TAG_module)
134 return true;
135 Parent = Parent.GetParent();
136 }
137 return false;
138}
139
140TypeSP DWARFASTParserClang::ParseTypeFromDWO(const DWARFDIE &die, Log *log) {
141 ModuleSP dwo_module_sp = die.GetContainingDWOModule();
142 if (!dwo_module_sp)
143 return TypeSP();
144
145 // This type comes from an external DWO module.
146 std::vector<CompilerContext> dwo_context;
147 die.GetDWOContext(dwo_context);
148 TypeMap dwo_types;
149
150 if (!dwo_module_sp->GetSymbolVendor()->FindTypes(dwo_context, true,
151 dwo_types)) {
152 if (!isClangModuleFwdDecl(die))
153 return TypeSP();
154
155 // Since this this type is defined in one of the Clang modules imported by
156 // this symbol file, search all of them.
157 auto *SymFile = die.GetCU()->GetSymbolFileDWARF();
158 for (const auto &NameModule : SymFile->getExternalTypeModules()) {
159 if (!NameModule.second)
160 continue;
161 SymbolVendor *SymVendor = NameModule.second->GetSymbolVendor();
162 if (SymVendor->FindTypes(dwo_context, true, dwo_types))
163 break;
164 }
165 }
166
167 const size_t num_dwo_types = dwo_types.GetSize();
168 if (num_dwo_types != 1)
169 return TypeSP();
170
171 // We found a real definition for this type in the Clang module, so lets use
172 // it and cache the fact that we found a complete type for this die.
173 TypeSP dwo_type_sp = dwo_types.GetTypeAtIndex(0);
174 if (!dwo_type_sp)
175 return TypeSP();
176
177 lldb_private::CompilerType dwo_type = dwo_type_sp->GetForwardCompilerType();
178
179 lldb_private::CompilerType type =
180 GetClangASTImporter().CopyType(m_ast, dwo_type);
181
182 if (!type)
183 return TypeSP();
184
185 SymbolFileDWARF *dwarf = die.GetDWARF();
186 TypeSP type_sp(new Type(
187 die.GetID(), dwarf, dwo_type_sp->GetName(), dwo_type_sp->GetByteSize(),
188 NULL__null, LLDB_INVALID_UID(18446744073709551615UL), Type::eEncodingInvalid,
189 &dwo_type_sp->GetDeclaration(), type, Type::eResolveStateForward));
190
191 dwarf->GetTypeList()->Insert(type_sp);
192 dwarf->GetDIEToType()[die.GetDIE()] = type_sp.get();
193 clang::TagDecl *tag_decl = ClangASTContext::GetAsTagDecl(type);
194 if (tag_decl)
195 LinkDeclContextToDIE(tag_decl, die);
196 else {
197 clang::DeclContext *defn_decl_ctx = GetCachedClangDeclContextForDIE(die);
198 if (defn_decl_ctx)
199 LinkDeclContextToDIE(defn_decl_ctx, die);
200 }
201
202 return type_sp;
203}
204
205static void CompleteExternalTagDeclType(ClangASTImporter &ast_importer,
206 clang::DeclContext *decl_ctx,
207 DWARFDIE die,
208 const char *type_name_cstr) {
209 auto *tag_decl_ctx = clang::dyn_cast<clang::TagDecl>(decl_ctx);
210 if (!tag_decl_ctx)
211 return;
212
213 // If this type was not imported from an external AST, there's nothing to do.
214 CompilerType type = ClangASTContext::GetTypeForDecl(tag_decl_ctx);
215 if (!type || !ast_importer.CanImport(type))
216 return;
217
218 auto qual_type = ClangUtil::GetQualType(type);
219 if (!ast_importer.RequireCompleteType(qual_type)) {
220 die.GetDWARF()->GetObjectFile()->GetModule()->ReportError(
221 "Unable to complete the Decl context for DIE '%s' at offset "
222 "0x%8.8x.\nPlease file a bug report.",
223 type_name_cstr ? type_name_cstr : "", die.GetOffset());
224 // We need to make the type look complete otherwise, we might crash in
225 // Clang when adding children.
226 if (ClangASTContext::StartTagDeclarationDefinition(type))
227 ClangASTContext::CompleteTagDeclarationDefinition(type);
228 }
229}
230
231TypeSP DWARFASTParserClang::ParseTypeFromDWARF(const SymbolContext &sc,
232 const DWARFDIE &die, Log *log,
233 bool *type_is_new_ptr) {
234 TypeSP type_sp;
235
236 if (type_is_new_ptr)
1
Assuming 'type_is_new_ptr' is null
2
Taking false branch
237 *type_is_new_ptr = false;
238
239 AccessType accessibility = eAccessNone;
240 if (die) {
3
Assuming the condition is true
4
Taking true branch
241 SymbolFileDWARF *dwarf = die.GetDWARF();
242 if (log) {
5
Assuming 'log' is null
6
Taking false branch
243 DWARFDIE context_die;
244 clang::DeclContext *context =
245 GetClangDeclContextContainingDIE(die, &context_die);
246
247 dwarf->GetObjectFile()->GetModule()->LogMessage(
248 log, "SymbolFileDWARF::ParseType (die = 0x%8.8x, decl_ctx = %p (die "
249 "0x%8.8x)) %s name = '%s')",
250 die.GetOffset(), static_cast<void *>(context),
251 context_die.GetOffset(), die.GetTagAsCString(), die.GetName());
252 }
253 Type *type_ptr = dwarf->GetDIEToType().lookup(die.GetDIE());
254 TypeList *type_list = dwarf->GetTypeList();
255 if (type_ptr == NULL__null) {
7
Assuming 'type_ptr' is equal to NULL
8
Taking true branch
256 if (type_is_new_ptr)
9
Taking false branch
257 *type_is_new_ptr = true;
258
259 const dw_tag_t tag = die.Tag();
260
261 bool is_forward_declaration = false;
262 DWARFAttributes attributes;
263 const char *type_name_cstr = NULL__null;
10
'type_name_cstr' initialized to a null pointer value
264 const char *mangled_name_cstr = NULL__null;
265 ConstString type_name_const_str;
266 Type::ResolveState resolve_state = Type::eResolveStateUnresolved;
267 uint64_t byte_size = 0;
268 Declaration decl;
269
270 Type::EncodingDataType encoding_data_type = Type::eEncodingIsUID;
271 CompilerType clang_type;
272 DWARFFormValue form_value;
273
274 dw_attr_t attr;
275
276 switch (tag) {
11
Control jumps to 'case DW_TAG_unspecified_type:' at line 285
277 case DW_TAG_typedef:
278 case DW_TAG_base_type:
279 case DW_TAG_pointer_type:
280 case DW_TAG_reference_type:
281 case DW_TAG_rvalue_reference_type:
282 case DW_TAG_const_type:
283 case DW_TAG_restrict_type:
284 case DW_TAG_volatile_type:
285 case DW_TAG_unspecified_type: {
286 // Set a bit that lets us know that we are currently parsing this
287 dwarf->GetDIEToType()[die.GetDIE()] = DIE_IS_BEING_PARSED((lldb_private::Type *)1);
288
289 const size_t num_attributes = die.GetAttributes(attributes);
290 uint32_t encoding = 0;
291 DWARFFormValue encoding_uid;
292
293 if (num_attributes > 0) {
12
Assuming 'num_attributes' is <= 0
13
Taking false branch
294 uint32_t i;
295 for (i = 0; i < num_attributes; ++i) {
296 attr = attributes.AttributeAtIndex(i);
297 if (attributes.ExtractFormValueAtIndex(i, form_value)) {
298 switch (attr) {
299 case DW_AT_decl_file:
300 decl.SetFile(sc.comp_unit->GetSupportFiles().GetFileSpecAtIndex(
301 form_value.Unsigned()));
302 break;
303 case DW_AT_decl_line:
304 decl.SetLine(form_value.Unsigned());
305 break;
306 case DW_AT_decl_column:
307 decl.SetColumn(form_value.Unsigned());
308 break;
309 case DW_AT_name:
310
311 type_name_cstr = form_value.AsCString();
312 // Work around a bug in llvm-gcc where they give a name to a
313 // reference type which doesn't include the "&"...
314 if (tag == DW_TAG_reference_type) {
315 if (strchr(type_name_cstr, '&') == NULL__null)
316 type_name_cstr = NULL__null;
317 }
318 if (type_name_cstr)
319 type_name_const_str.SetCString(type_name_cstr);
320 break;
321 case DW_AT_byte_size:
322 byte_size = form_value.Unsigned();
323 break;
324 case DW_AT_encoding:
325 encoding = form_value.Unsigned();
326 break;
327 case DW_AT_type:
328 encoding_uid = form_value;
329 break;
330 default:
331 case DW_AT_sibling:
332 break;
333 }
334 }
335 }
336 }
337
338 if (tag == DW_TAG_typedef && encoding_uid.IsValid()) {
339 // Try to parse a typedef from the DWO file first as modules can
340 // contain typedef'ed structures that have no names like:
341 //
342 // typedef struct { int a; } Foo;
343 //
344 // In this case we will have a structure with no name and a typedef
345 // named "Foo" that points to this unnamed structure. The name in the
346 // typedef is the only identifier for the struct, so always try to
347 // get typedefs from DWO files if possible.
348 //
349 // The type_sp returned will be empty if the typedef doesn't exist in
350 // a DWO file, so it is cheap to call this function just to check.
351 //
352 // If we don't do this we end up creating a TypeSP that says this is
353 // a typedef to type 0x123 (the DW_AT_type value would be 0x123 in
354 // the DW_TAG_typedef), and this is the unnamed structure type. We
355 // will have a hard time tracking down an unnammed structure type in
356 // the module DWO file, so we make sure we don't get into this
357 // situation by always resolving typedefs from the DWO file.
358 const DWARFDIE encoding_die = dwarf->GetDIE(DIERef(encoding_uid));
359
360 // First make sure that the die that this is typedef'ed to _is_ just
361 // a declaration (DW_AT_declaration == 1), not a full definition
362 // since template types can't be represented in modules since only
363 // concrete instances of templates are ever emitted and modules won't
364 // contain those
365 if (encoding_die &&
366 encoding_die.GetAttributeValueAsUnsigned(DW_AT_declaration, 0) ==
367 1) {
368 type_sp = ParseTypeFromDWO(die, log);
369 if (type_sp)
370 return type_sp;
371 }
372 }
373
374 DEBUG_PRINTF("0x%8.8" PRIx64 ": %s (\"%s\") type => 0x%8.8lx\n",
375 die.GetID(), DW_TAG_value_to_name(tag), type_name_cstr,
376 encoding_uid.Reference());
377
378 switch (tag) {
14
Control jumps to 'case DW_TAG_unspecified_type:' at line 382
379 default:
380 break;
381
382 case DW_TAG_unspecified_type:
383 if (strcmp(type_name_cstr, "nullptr_t") == 0 ||
15
Null pointer passed as an argument to a 'nonnull' parameter
384 strcmp(type_name_cstr, "decltype(nullptr)") == 0) {
385 resolve_state = Type::eResolveStateFull;
386 clang_type = m_ast.GetBasicType(eBasicTypeNullPtr);
387 break;
388 }
389 // Fall through to base type below in case we can handle the type
390 // there...
391 LLVM_FALLTHROUGH[[clang::fallthrough]];
392
393 case DW_TAG_base_type:
394 resolve_state = Type::eResolveStateFull;
395 clang_type = m_ast.GetBuiltinTypeForDWARFEncodingAndBitSize(
396 type_name_cstr, encoding, byte_size * 8);
397 break;
398
399 case DW_TAG_pointer_type:
400 encoding_data_type = Type::eEncodingIsPointerUID;
401 break;
402 case DW_TAG_reference_type:
403 encoding_data_type = Type::eEncodingIsLValueReferenceUID;
404 break;
405 case DW_TAG_rvalue_reference_type:
406 encoding_data_type = Type::eEncodingIsRValueReferenceUID;
407 break;
408 case DW_TAG_typedef:
409 encoding_data_type = Type::eEncodingIsTypedefUID;
410 break;
411 case DW_TAG_const_type:
412 encoding_data_type = Type::eEncodingIsConstUID;
413 break;
414 case DW_TAG_restrict_type:
415 encoding_data_type = Type::eEncodingIsRestrictUID;
416 break;
417 case DW_TAG_volatile_type:
418 encoding_data_type = Type::eEncodingIsVolatileUID;
419 break;
420 }
421
422 if (!clang_type &&
423 (encoding_data_type == Type::eEncodingIsPointerUID ||
424 encoding_data_type == Type::eEncodingIsTypedefUID) &&
425 sc.comp_unit != NULL__null) {
426 if (tag == DW_TAG_pointer_type) {
427 DWARFDIE target_die = die.GetReferencedDIE(DW_AT_type);
428
429 if (target_die.GetAttributeValueAsUnsigned(DW_AT_APPLE_block, 0)) {
430 // Blocks have a __FuncPtr inside them which is a pointer to a
431 // function of the proper type.
432
433 for (DWARFDIE child_die = target_die.GetFirstChild();
434 child_die.IsValid(); child_die = child_die.GetSibling()) {
435 if (!strcmp(child_die.GetAttributeValueAsString(DW_AT_name, ""),
436 "__FuncPtr")) {
437 DWARFDIE function_pointer_type =
438 child_die.GetReferencedDIE(DW_AT_type);
439
440 if (function_pointer_type) {
441 DWARFDIE function_type =
442 function_pointer_type.GetReferencedDIE(DW_AT_type);
443
444 bool function_type_is_new_pointer;
445 TypeSP lldb_function_type_sp = ParseTypeFromDWARF(
446 sc, function_type, log, &function_type_is_new_pointer);
447
448 if (lldb_function_type_sp) {
449 clang_type = m_ast.CreateBlockPointerType(
450 lldb_function_type_sp->GetForwardCompilerType());
451 encoding_data_type = Type::eEncodingIsUID;
452 encoding_uid.Clear();
453 resolve_state = Type::eResolveStateFull;
454 }
455 }
456
457 break;
458 }
459 }
460 }
461 }
462
463 bool translation_unit_is_objc =
464 (sc.comp_unit->GetLanguage() == eLanguageTypeObjC ||
465 sc.comp_unit->GetLanguage() == eLanguageTypeObjC_plus_plus);
466
467 if (translation_unit_is_objc) {
468 if (type_name_cstr != NULL__null) {
469 static ConstString g_objc_type_name_id("id");
470 static ConstString g_objc_type_name_Class("Class");
471 static ConstString g_objc_type_name_selector("SEL");
472
473 if (type_name_const_str == g_objc_type_name_id) {
474 if (log)
475 dwarf->GetObjectFile()->GetModule()->LogMessage(
476 log, "SymbolFileDWARF::ParseType (die = 0x%8.8x) %s '%s' "
477 "is Objective-C 'id' built-in type.",
478 die.GetOffset(), die.GetTagAsCString(), die.GetName());
479 clang_type = m_ast.GetBasicType(eBasicTypeObjCID);
480 encoding_data_type = Type::eEncodingIsUID;
481 encoding_uid.Clear();
482 resolve_state = Type::eResolveStateFull;
483
484 } else if (type_name_const_str == g_objc_type_name_Class) {
485 if (log)
486 dwarf->GetObjectFile()->GetModule()->LogMessage(
487 log, "SymbolFileDWARF::ParseType (die = 0x%8.8x) %s '%s' "
488 "is Objective-C 'Class' built-in type.",
489 die.GetOffset(), die.GetTagAsCString(), die.GetName());
490 clang_type = m_ast.GetBasicType(eBasicTypeObjCClass);
491 encoding_data_type = Type::eEncodingIsUID;
492 encoding_uid.Clear();
493 resolve_state = Type::eResolveStateFull;
494 } else if (type_name_const_str == g_objc_type_name_selector) {
495 if (log)
496 dwarf->GetObjectFile()->GetModule()->LogMessage(
497 log, "SymbolFileDWARF::ParseType (die = 0x%8.8x) %s '%s' "
498 "is Objective-C 'selector' built-in type.",
499 die.GetOffset(), die.GetTagAsCString(), die.GetName());
500 clang_type = m_ast.GetBasicType(eBasicTypeObjCSel);
501 encoding_data_type = Type::eEncodingIsUID;
502 encoding_uid.Clear();
503 resolve_state = Type::eResolveStateFull;
504 }
505 } else if (encoding_data_type == Type::eEncodingIsPointerUID &&
506 encoding_uid.IsValid()) {
507 // Clang sometimes erroneously emits id as objc_object*. In that
508 // case we fix up the type to "id".
509
510 const DWARFDIE encoding_die = dwarf->GetDIE(DIERef(encoding_uid));
511
512 if (encoding_die && encoding_die.Tag() == DW_TAG_structure_type) {
513 if (const char *struct_name = encoding_die.GetName()) {
514 if (!strcmp(struct_name, "objc_object")) {
515 if (log)
516 dwarf->GetObjectFile()->GetModule()->LogMessage(
517 log, "SymbolFileDWARF::ParseType (die = 0x%8.8x) %s "
518 "'%s' is 'objc_object*', which we overrode to "
519 "'id'.",
520 die.GetOffset(), die.GetTagAsCString(),
521 die.GetName());
522 clang_type = m_ast.GetBasicType(eBasicTypeObjCID);
523 encoding_data_type = Type::eEncodingIsUID;
524 encoding_uid.Clear();
525 resolve_state = Type::eResolveStateFull;
526 }
527 }
528 }
529 }
530 }
531 }
532
533 type_sp.reset(
534 new Type(die.GetID(), dwarf, type_name_const_str, byte_size, NULL__null,
535 DIERef(encoding_uid).GetUID(dwarf), encoding_data_type,
536 &decl, clang_type, resolve_state));
537
538 dwarf->GetDIEToType()[die.GetDIE()] = type_sp.get();
539 } break;
540
541 case DW_TAG_structure_type:
542 case DW_TAG_union_type:
543 case DW_TAG_class_type: {
544 // Set a bit that lets us know that we are currently parsing this
545 dwarf->GetDIEToType()[die.GetDIE()] = DIE_IS_BEING_PARSED((lldb_private::Type *)1);
546 bool byte_size_valid = false;
547
548 LanguageType class_language = eLanguageTypeUnknown;
549 bool is_complete_objc_class = false;
550 size_t calling_convention
551 = llvm::dwarf::CallingConvention::DW_CC_normal;
552
553 const size_t num_attributes = die.GetAttributes(attributes);
554 if (num_attributes > 0) {
555 uint32_t i;
556 for (i = 0; i < num_attributes; ++i) {
557 attr = attributes.AttributeAtIndex(i);
558 if (attributes.ExtractFormValueAtIndex(i, form_value)) {
559 switch (attr) {
560 case DW_AT_decl_file:
561 if (die.GetCU()->DW_AT_decl_file_attributes_are_invalid()) {
562 // llvm-gcc outputs invalid DW_AT_decl_file attributes that
563 // always point to the compile unit file, so we clear this
564 // invalid value so that we can still unique types
565 // efficiently.
566 decl.SetFile(FileSpec("<invalid>", false));
567 } else
568 decl.SetFile(
569 sc.comp_unit->GetSupportFiles().GetFileSpecAtIndex(
570 form_value.Unsigned()));
571 break;
572
573 case DW_AT_decl_line:
574 decl.SetLine(form_value.Unsigned());
575 break;
576
577 case DW_AT_decl_column:
578 decl.SetColumn(form_value.Unsigned());
579 break;
580
581 case DW_AT_name:
582 type_name_cstr = form_value.AsCString();
583 type_name_const_str.SetCString(type_name_cstr);
584 break;
585
586 case DW_AT_byte_size:
587 byte_size = form_value.Unsigned();
588 byte_size_valid = true;
589 break;
590
591 case DW_AT_accessibility:
592 accessibility = DW_ACCESS_to_AccessType(form_value.Unsigned());
593 break;
594
595 case DW_AT_declaration:
596 is_forward_declaration = form_value.Boolean();
597 break;
598
599 case DW_AT_APPLE_runtime_class:
600 class_language = (LanguageType)form_value.Signed();
601 break;
602
603 case DW_AT_APPLE_objc_complete_type:
604 is_complete_objc_class = form_value.Signed();
605 break;
606 case DW_AT_calling_convention:
607 calling_convention = form_value.Unsigned();
608 break;
609
610 case DW_AT_allocated:
611 case DW_AT_associated:
612 case DW_AT_data_location:
613 case DW_AT_description:
614 case DW_AT_start_scope:
615 case DW_AT_visibility:
616 default:
617 case DW_AT_sibling:
618 break;
619 }
620 }
621 }
622 }
623
624 // UniqueDWARFASTType is large, so don't create a local variables on
625 // the stack, put it on the heap. This function is often called
626 // recursively and clang isn't good and sharing the stack space for
627 // variables in different blocks.
628 std::unique_ptr<UniqueDWARFASTType> unique_ast_entry_ap(
629 new UniqueDWARFASTType());
630
631 ConstString unique_typename(type_name_const_str);
632 Declaration unique_decl(decl);
633
634 if (type_name_const_str) {
635 LanguageType die_language = die.GetLanguage();
636 if (Language::LanguageIsCPlusPlus(die_language)) {
637 // For C++, we rely solely upon the one definition rule that says
638 // only one thing can exist at a given decl context. We ignore the
639 // file and line that things are declared on.
640 std::string qualified_name;
641 if (die.GetQualifiedName(qualified_name))
642 unique_typename = ConstString(qualified_name);
643 unique_decl.Clear();
644 }
645
646 if (dwarf->GetUniqueDWARFASTTypeMap().Find(
647 unique_typename, die, unique_decl,
648 byte_size_valid ? byte_size : -1, *unique_ast_entry_ap)) {
649 type_sp = unique_ast_entry_ap->m_type_sp;
650 if (type_sp) {
651 dwarf->GetDIEToType()[die.GetDIE()] = type_sp.get();
652 return type_sp;
653 }
654 }
655 }
656
657 DEBUG_PRINTF("0x%8.8" PRIx64 ": %s (\"%s\")\n", die.GetID(),
658 DW_TAG_value_to_name(tag), type_name_cstr);
659
660 int tag_decl_kind = -1;
661 AccessType default_accessibility = eAccessNone;
662 if (tag == DW_TAG_structure_type) {
663 tag_decl_kind = clang::TTK_Struct;
664 default_accessibility = eAccessPublic;
665 } else if (tag == DW_TAG_union_type) {
666 tag_decl_kind = clang::TTK_Union;
667 default_accessibility = eAccessPublic;
668 } else if (tag == DW_TAG_class_type) {
669 tag_decl_kind = clang::TTK_Class;
670 default_accessibility = eAccessPrivate;
671 }
672
673 if (byte_size_valid && byte_size == 0 && type_name_cstr &&
674 die.HasChildren() == false &&
675 sc.comp_unit->GetLanguage() == eLanguageTypeObjC) {
676 // Work around an issue with clang at the moment where forward
677 // declarations for objective C classes are emitted as:
678 // DW_TAG_structure_type [2]
679 // DW_AT_name( "ForwardObjcClass" )
680 // DW_AT_byte_size( 0x00 )
681 // DW_AT_decl_file( "..." )
682 // DW_AT_decl_line( 1 )
683 //
684 // Note that there is no DW_AT_declaration and there are no children,
685 // and the byte size is zero.
686 is_forward_declaration = true;
687 }
688
689 if (class_language == eLanguageTypeObjC ||
690 class_language == eLanguageTypeObjC_plus_plus) {
691 if (!is_complete_objc_class &&
692 die.Supports_DW_AT_APPLE_objc_complete_type()) {
693 // We have a valid eSymbolTypeObjCClass class symbol whose name
694 // matches the current objective C class that we are trying to find
695 // and this DIE isn't the complete definition (we checked
696 // is_complete_objc_class above and know it is false), so the real
697 // definition is in here somewhere
698 type_sp = dwarf->FindCompleteObjCDefinitionTypeForDIE(
699 die, type_name_const_str, true);
700
701 if (!type_sp) {
702 SymbolFileDWARFDebugMap *debug_map_symfile =
703 dwarf->GetDebugMapSymfile();
704 if (debug_map_symfile) {
705 // We weren't able to find a full declaration in this DWARF,
706 // see if we have a declaration anywhere else...
707 type_sp =
708 debug_map_symfile->FindCompleteObjCDefinitionTypeForDIE(
709 die, type_name_const_str, true);
710 }
711 }
712
713 if (type_sp) {
714 if (log) {
715 dwarf->GetObjectFile()->GetModule()->LogMessage(
716 log, "SymbolFileDWARF(%p) - 0x%8.8x: %s type \"%s\" is an "
717 "incomplete objc type, complete type is 0x%8.8" PRIx64"l" "x",
718 static_cast<void *>(this), die.GetOffset(),
719 DW_TAG_value_to_name(tag), type_name_cstr,
720 type_sp->GetID());
721 }
722
723 // We found a real definition for this type elsewhere so lets use
724 // it and cache the fact that we found a complete type for this
725 // die
726 dwarf->GetDIEToType()[die.GetDIE()] = type_sp.get();
727 return type_sp;
728 }
729 }
730 }
731
732 if (is_forward_declaration) {
733 // We have a forward declaration to a type and we need to try and
734 // find a full declaration. We look in the current type index just in
735 // case we have a forward declaration followed by an actual
736 // declarations in the DWARF. If this fails, we need to look
737 // elsewhere...
738 if (log) {
739 dwarf->GetObjectFile()->GetModule()->LogMessage(
740 log, "SymbolFileDWARF(%p) - 0x%8.8x: %s type \"%s\" is a "
741 "forward declaration, trying to find complete type",
742 static_cast<void *>(this), die.GetOffset(),
743 DW_TAG_value_to_name(tag), type_name_cstr);
744 }
745
746 // See if the type comes from a DWO module and if so, track down that
747 // type.
748 type_sp = ParseTypeFromDWO(die, log);
749 if (type_sp)
750 return type_sp;
751
752 DWARFDeclContext die_decl_ctx;
753 die.GetDWARFDeclContext(die_decl_ctx);
754
755 // type_sp = FindDefinitionTypeForDIE (dwarf_cu, die,
756 // type_name_const_str);
757 type_sp = dwarf->FindDefinitionTypeForDWARFDeclContext(die_decl_ctx);
758
759 if (!type_sp) {
760 SymbolFileDWARFDebugMap *debug_map_symfile =
761 dwarf->GetDebugMapSymfile();
762 if (debug_map_symfile) {
763 // We weren't able to find a full declaration in this DWARF, see
764 // if we have a declaration anywhere else...
765 type_sp =
766 debug_map_symfile->FindDefinitionTypeForDWARFDeclContext(
767 die_decl_ctx);
768 }
769 }
770
771 if (type_sp) {
772 if (log) {
773 dwarf->GetObjectFile()->GetModule()->LogMessage(
774 log, "SymbolFileDWARF(%p) - 0x%8.8x: %s type \"%s\" is a "
775 "forward declaration, complete type is 0x%8.8" PRIx64"l" "x",
776 static_cast<void *>(this), die.GetOffset(),
777 DW_TAG_value_to_name(tag), type_name_cstr, type_sp->GetID());
778 }
779
780 // We found a real definition for this type elsewhere so lets use
781 // it and cache the fact that we found a complete type for this die
782 dwarf->GetDIEToType()[die.GetDIE()] = type_sp.get();
783 clang::DeclContext *defn_decl_ctx = GetCachedClangDeclContextForDIE(
784 dwarf->DebugInfo()->GetDIE(DIERef(type_sp->GetID(), dwarf)));
785 if (defn_decl_ctx)
786 LinkDeclContextToDIE(defn_decl_ctx, die);
787 return type_sp;
788 }
789 }
790 assert(tag_decl_kind != -1)(static_cast <bool> (tag_decl_kind != -1) ? void (0) : __assert_fail
("tag_decl_kind != -1", "/build/llvm-toolchain-snapshot-7~svn338205/tools/lldb/source/Plugins/SymbolFile/DWARF/DWARFASTParserClang.cpp"
, 790, __extension__ __PRETTY_FUNCTION__))
;
791 bool clang_type_was_created = false;
792 clang_type.SetCompilerType(
793 &m_ast, dwarf->GetForwardDeclDieToClangType().lookup(die.GetDIE()));
794 if (!clang_type) {
795 clang::DeclContext *decl_ctx =
796 GetClangDeclContextContainingDIE(die, nullptr);
797
798 // If your decl context is a record that was imported from another
799 // AST context (in the gmodules case), we need to make sure the type
800 // backing the Decl is complete before adding children to it. This is
801 // not an issue in the non-gmodules case because the debug info will
802 // always contain a full definition of parent types in that case.
803 CompleteExternalTagDeclType(GetClangASTImporter(), decl_ctx, die,
804 type_name_cstr);
805
806 if (accessibility == eAccessNone && decl_ctx) {
807 // Check the decl context that contains this class/struct/union. If
808 // it is a class we must give it an accessibility.
809 const clang::Decl::Kind containing_decl_kind =
810 decl_ctx->getDeclKind();
811 if (DeclKindIsCXXClass(containing_decl_kind))
812 accessibility = default_accessibility;
813 }
814
815 ClangASTMetadata metadata;
816 metadata.SetUserID(die.GetID());
817 metadata.SetIsDynamicCXXType(dwarf->ClassOrStructIsVirtual(die));
818
819 if (type_name_cstr && strchr(type_name_cstr, '<')) {
820 ClangASTContext::TemplateParameterInfos template_param_infos;
821 if (ParseTemplateParameterInfos(die, template_param_infos)) {
822 clang::ClassTemplateDecl *class_template_decl =
823 m_ast.ParseClassTemplateDecl(decl_ctx, accessibility,
824 type_name_cstr, tag_decl_kind,
825 template_param_infos);
826 if (!class_template_decl) {
827 if (log) {
828 dwarf->GetObjectFile()->GetModule()->LogMessage(
829 log, "SymbolFileDWARF(%p) - 0x%8.8x: %s type \"%s\" "
830 "clang::ClassTemplateDecl failed to return a decl.",
831 static_cast<void *>(this), die.GetOffset(),
832 DW_TAG_value_to_name(tag), type_name_cstr);
833 }
834 return TypeSP();
835 }
836
837 clang::ClassTemplateSpecializationDecl
838 *class_specialization_decl =
839 m_ast.CreateClassTemplateSpecializationDecl(
840 decl_ctx, class_template_decl, tag_decl_kind,
841 template_param_infos);
842 clang_type = m_ast.CreateClassTemplateSpecializationType(
843 class_specialization_decl);
844 clang_type_was_created = true;
845
846 m_ast.SetMetadata(class_template_decl, metadata);
847 m_ast.SetMetadata(class_specialization_decl, metadata);
848 }
849 }
850
851 if (!clang_type_was_created) {
852 clang_type_was_created = true;
853 clang_type = m_ast.CreateRecordType(decl_ctx, accessibility,
854 type_name_cstr, tag_decl_kind,
855 class_language, &metadata);
856 }
857 }
858
859 // Store a forward declaration to this class type in case any
860 // parameters in any class methods need it for the clang types for
861 // function prototypes.
862 LinkDeclContextToDIE(m_ast.GetDeclContextForType(clang_type), die);
863 type_sp.reset(new Type(die.GetID(), dwarf, type_name_const_str,
864 byte_size, NULL__null, LLDB_INVALID_UID(18446744073709551615UL),
865 Type::eEncodingIsUID, &decl, clang_type,
866 Type::eResolveStateForward));
867
868 type_sp->SetIsCompleteObjCClass(is_complete_objc_class);
869
870 // Add our type to the unique type map so we don't end up creating many
871 // copies of the same type over and over in the ASTContext for our
872 // module
873 unique_ast_entry_ap->m_type_sp = type_sp;
874 unique_ast_entry_ap->m_die = die;
875 unique_ast_entry_ap->m_declaration = unique_decl;
876 unique_ast_entry_ap->m_byte_size = byte_size;
877 dwarf->GetUniqueDWARFASTTypeMap().Insert(unique_typename,
878 *unique_ast_entry_ap);
879
880 if (is_forward_declaration && die.HasChildren()) {
881 // Check to see if the DIE actually has a definition, some version of
882 // GCC will
883 // emit DIEs with DW_AT_declaration set to true, but yet still have
884 // subprogram, members, or inheritance, so we can't trust it
885 DWARFDIE child_die = die.GetFirstChild();
886 while (child_die) {
887 switch (child_die.Tag()) {
888 case DW_TAG_inheritance:
889 case DW_TAG_subprogram:
890 case DW_TAG_member:
891 case DW_TAG_APPLE_property:
892 case DW_TAG_class_type:
893 case DW_TAG_structure_type:
894 case DW_TAG_enumeration_type:
895 case DW_TAG_typedef:
896 case DW_TAG_union_type:
897 child_die.Clear();
898 is_forward_declaration = false;
899 break;
900 default:
901 child_die = child_die.GetSibling();
902 break;
903 }
904 }
905 }
906
907 if (!is_forward_declaration) {
908 // Always start the definition for a class type so that if the class
909 // has child classes or types that require the class to be created
910 // for use as their decl contexts the class will be ready to accept
911 // these child definitions.
912 if (die.HasChildren() == false) {
913 // No children for this struct/union/class, lets finish it
914 if (ClangASTContext::StartTagDeclarationDefinition(clang_type)) {
915 ClangASTContext::CompleteTagDeclarationDefinition(clang_type);
916 } else {
917 dwarf->GetObjectFile()->GetModule()->ReportError(
918 "DWARF DIE at 0x%8.8x named \"%s\" was not able to start its "
919 "definition.\nPlease file a bug and attach the file at the "
920 "start of this error message",
921 die.GetOffset(), type_name_cstr);
922 }
923
924 if (tag == DW_TAG_structure_type) // this only applies in C
925 {
926 clang::RecordDecl *record_decl =
927 ClangASTContext::GetAsRecordDecl(clang_type);
928
929 if (record_decl) {
930 GetClangASTImporter().InsertRecordDecl(
931 record_decl, ClangASTImporter::LayoutInfo());
932 }
933 }
934 } else if (clang_type_was_created) {
935 // Start the definition if the class is not objective C since the
936 // underlying decls respond to isCompleteDefinition(). Objective
937 // C decls don't respond to isCompleteDefinition() so we can't
938 // start the declaration definition right away. For C++
939 // class/union/structs we want to start the definition in case the
940 // class is needed as the declaration context for a contained class
941 // or type without the need to complete that type..
942
943 if (class_language != eLanguageTypeObjC &&
944 class_language != eLanguageTypeObjC_plus_plus)
945 ClangASTContext::StartTagDeclarationDefinition(clang_type);
946
947 // Leave this as a forward declaration until we need to know the
948 // details of the type. lldb_private::Type will automatically call
949 // the SymbolFile virtual function
950 // "SymbolFileDWARF::CompleteType(Type *)" When the definition
951 // needs to be defined.
952 assert(!dwarf->GetForwardDeclClangTypeToDie().count((static_cast <bool> (!dwarf->GetForwardDeclClangTypeToDie
().count( ClangUtil::RemoveFastQualifiers(clang_type) .GetOpaqueQualType
()) && "Type already in the forward declaration map!"
) ? void (0) : __assert_fail ("!dwarf->GetForwardDeclClangTypeToDie().count( ClangUtil::RemoveFastQualifiers(clang_type) .GetOpaqueQualType()) && \"Type already in the forward declaration map!\""
, "/build/llvm-toolchain-snapshot-7~svn338205/tools/lldb/source/Plugins/SymbolFile/DWARF/DWARFASTParserClang.cpp"
, 955, __extension__ __PRETTY_FUNCTION__))
953 ClangUtil::RemoveFastQualifiers(clang_type)(static_cast <bool> (!dwarf->GetForwardDeclClangTypeToDie
().count( ClangUtil::RemoveFastQualifiers(clang_type) .GetOpaqueQualType
()) && "Type already in the forward declaration map!"
) ? void (0) : __assert_fail ("!dwarf->GetForwardDeclClangTypeToDie().count( ClangUtil::RemoveFastQualifiers(clang_type) .GetOpaqueQualType()) && \"Type already in the forward declaration map!\""
, "/build/llvm-toolchain-snapshot-7~svn338205/tools/lldb/source/Plugins/SymbolFile/DWARF/DWARFASTParserClang.cpp"
, 955, __extension__ __PRETTY_FUNCTION__))
954 .GetOpaqueQualType()) &&(static_cast <bool> (!dwarf->GetForwardDeclClangTypeToDie
().count( ClangUtil::RemoveFastQualifiers(clang_type) .GetOpaqueQualType
()) && "Type already in the forward declaration map!"
) ? void (0) : __assert_fail ("!dwarf->GetForwardDeclClangTypeToDie().count( ClangUtil::RemoveFastQualifiers(clang_type) .GetOpaqueQualType()) && \"Type already in the forward declaration map!\""
, "/build/llvm-toolchain-snapshot-7~svn338205/tools/lldb/source/Plugins/SymbolFile/DWARF/DWARFASTParserClang.cpp"
, 955, __extension__ __PRETTY_FUNCTION__))
955 "Type already in the forward declaration map!")(static_cast <bool> (!dwarf->GetForwardDeclClangTypeToDie
().count( ClangUtil::RemoveFastQualifiers(clang_type) .GetOpaqueQualType
()) && "Type already in the forward declaration map!"
) ? void (0) : __assert_fail ("!dwarf->GetForwardDeclClangTypeToDie().count( ClangUtil::RemoveFastQualifiers(clang_type) .GetOpaqueQualType()) && \"Type already in the forward declaration map!\""
, "/build/llvm-toolchain-snapshot-7~svn338205/tools/lldb/source/Plugins/SymbolFile/DWARF/DWARFASTParserClang.cpp"
, 955, __extension__ __PRETTY_FUNCTION__))
;
956 // Can't assume m_ast.GetSymbolFile() is actually a
957 // SymbolFileDWARF, it can be a SymbolFileDWARFDebugMap for Apple
958 // binaries.
959 dwarf->GetForwardDeclDieToClangType()[die.GetDIE()] =
960 clang_type.GetOpaqueQualType();
961 dwarf->GetForwardDeclClangTypeToDie()
962 [ClangUtil::RemoveFastQualifiers(clang_type)
963 .GetOpaqueQualType()] = die.GetDIERef();
964 m_ast.SetHasExternalStorage(clang_type.GetOpaqueQualType(), true);
965 }
966 }
967
968 // If we made a clang type, set the trivial abi if applicable: We only
969 // do this for pass by value - which implies the Trivial ABI. There
970 // isn't a way to assert that something that would normally be pass by
971 // value is pass by reference, so we ignore that attribute if set.
972 if (calling_convention == llvm::dwarf::DW_CC_pass_by_value) {
973 clang::CXXRecordDecl *record_decl =
974 m_ast.GetAsCXXRecordDecl(clang_type.GetOpaqueQualType());
975 if (record_decl) {
976 record_decl->setHasTrivialSpecialMemberForCall();
977 }
978 }
979
980 } break;
981
982 case DW_TAG_enumeration_type: {
983 // Set a bit that lets us know that we are currently parsing this
984 dwarf->GetDIEToType()[die.GetDIE()] = DIE_IS_BEING_PARSED((lldb_private::Type *)1);
985
986 bool is_scoped = false;
987 DWARFFormValue encoding_form;
988
989 const size_t num_attributes = die.GetAttributes(attributes);
990 if (num_attributes > 0) {
991 uint32_t i;
992
993 for (i = 0; i < num_attributes; ++i) {
994 attr = attributes.AttributeAtIndex(i);
995 if (attributes.ExtractFormValueAtIndex(i, form_value)) {
996 switch (attr) {
997 case DW_AT_decl_file:
998 decl.SetFile(sc.comp_unit->GetSupportFiles().GetFileSpecAtIndex(
999 form_value.Unsigned()));
1000 break;
1001 case DW_AT_decl_line:
1002 decl.SetLine(form_value.Unsigned());
1003 break;
1004 case DW_AT_decl_column:
1005 decl.SetColumn(form_value.Unsigned());
1006 break;
1007 case DW_AT_name:
1008 type_name_cstr = form_value.AsCString();
1009 type_name_const_str.SetCString(type_name_cstr);
1010 break;
1011 case DW_AT_type:
1012 encoding_form = form_value;
1013 break;
1014 case DW_AT_byte_size:
1015 byte_size = form_value.Unsigned();
1016 break;
1017 case DW_AT_accessibility:
1018 break; // accessibility =
1019 // DW_ACCESS_to_AccessType(form_value.Unsigned()); break;
1020 case DW_AT_declaration:
1021 is_forward_declaration = form_value.Boolean();
1022 break;
1023 case DW_AT_enum_class:
1024 is_scoped = form_value.Boolean();
1025 break;
1026 case DW_AT_allocated:
1027 case DW_AT_associated:
1028 case DW_AT_bit_stride:
1029 case DW_AT_byte_stride:
1030 case DW_AT_data_location:
1031 case DW_AT_description:
1032 case DW_AT_start_scope:
1033 case DW_AT_visibility:
1034 case DW_AT_specification:
1035 case DW_AT_abstract_origin:
1036 case DW_AT_sibling:
1037 break;
1038 }
1039 }
1040 }
1041
1042 if (is_forward_declaration) {
1043 type_sp = ParseTypeFromDWO(die, log);
1044 if (type_sp)
1045 return type_sp;
1046
1047 DWARFDeclContext die_decl_ctx;
1048 die.GetDWARFDeclContext(die_decl_ctx);
1049
1050 type_sp =
1051 dwarf->FindDefinitionTypeForDWARFDeclContext(die_decl_ctx);
1052
1053 if (!type_sp) {
1054 SymbolFileDWARFDebugMap *debug_map_symfile =
1055 dwarf->GetDebugMapSymfile();
1056 if (debug_map_symfile) {
1057 // We weren't able to find a full declaration in this DWARF,
1058 // see if we have a declaration anywhere else...
1059 type_sp =
1060 debug_map_symfile->FindDefinitionTypeForDWARFDeclContext(
1061 die_decl_ctx);
1062 }
1063 }
1064
1065 if (type_sp) {
1066 if (log) {
1067 dwarf->GetObjectFile()->GetModule()->LogMessage(
1068 log, "SymbolFileDWARF(%p) - 0x%8.8x: %s type \"%s\" is a "
1069 "forward declaration, complete type is 0x%8.8" PRIx64"l" "x",
1070 static_cast<void *>(this), die.GetOffset(),
1071 DW_TAG_value_to_name(tag), type_name_cstr,
1072 type_sp->GetID());
1073 }
1074
1075 // We found a real definition for this type elsewhere so lets use
1076 // it and cache the fact that we found a complete type for this
1077 // die
1078 dwarf->GetDIEToType()[die.GetDIE()] = type_sp.get();
1079 clang::DeclContext *defn_decl_ctx =
1080 GetCachedClangDeclContextForDIE(dwarf->DebugInfo()->GetDIE(
1081 DIERef(type_sp->GetID(), dwarf)));
1082 if (defn_decl_ctx)
1083 LinkDeclContextToDIE(defn_decl_ctx, die);
1084 return type_sp;
1085 }
1086 }
1087 DEBUG_PRINTF("0x%8.8" PRIx64 ": %s (\"%s\")\n", die.GetID(),
1088 DW_TAG_value_to_name(tag), type_name_cstr);
1089
1090 CompilerType enumerator_clang_type;
1091 clang_type.SetCompilerType(
1092 &m_ast,
1093 dwarf->GetForwardDeclDieToClangType().lookup(die.GetDIE()));
1094 if (!clang_type) {
1095 if (encoding_form.IsValid()) {
1096 Type *enumerator_type =
1097 dwarf->ResolveTypeUID(DIERef(encoding_form));
1098 if (enumerator_type)
1099 enumerator_clang_type = enumerator_type->GetFullCompilerType();
1100 }
1101
1102 if (!enumerator_clang_type) {
1103 if (byte_size > 0) {
1104 enumerator_clang_type =
1105 m_ast.GetBuiltinTypeForDWARFEncodingAndBitSize(
1106 NULL__null, DW_ATE_signed, byte_size * 8);
1107 } else {
1108 enumerator_clang_type = m_ast.GetBasicType(eBasicTypeInt);
1109 }
1110 }
1111
1112 clang_type = m_ast.CreateEnumerationType(
1113 type_name_cstr, GetClangDeclContextContainingDIE(die, nullptr),
1114 decl, enumerator_clang_type, is_scoped);
1115 } else {
1116 enumerator_clang_type =
1117 m_ast.GetEnumerationIntegerType(clang_type.GetOpaqueQualType());
1118 }
1119
1120 LinkDeclContextToDIE(
1121 ClangASTContext::GetDeclContextForType(clang_type), die);
1122
1123 type_sp.reset(new Type(
1124 die.GetID(), dwarf, type_name_const_str, byte_size, NULL__null,
1125 DIERef(encoding_form).GetUID(dwarf), Type::eEncodingIsUID, &decl,
1126 clang_type, Type::eResolveStateForward));
1127
1128 if (ClangASTContext::StartTagDeclarationDefinition(clang_type)) {
1129 if (die.HasChildren()) {
1130 SymbolContext cu_sc(die.GetLLDBCompileUnit());
1131 bool is_signed = false;
1132 enumerator_clang_type.IsIntegerType(is_signed);
1133 ParseChildEnumerators(cu_sc, clang_type, is_signed,
1134 type_sp->GetByteSize(), die);
1135 }
1136 ClangASTContext::CompleteTagDeclarationDefinition(clang_type);
1137 } else {
1138 dwarf->GetObjectFile()->GetModule()->ReportError(
1139 "DWARF DIE at 0x%8.8x named \"%s\" was not able to start its "
1140 "definition.\nPlease file a bug and attach the file at the "
1141 "start of this error message",
1142 die.GetOffset(), type_name_cstr);
1143 }
1144 }
1145 } break;
1146
1147 case DW_TAG_inlined_subroutine:
1148 case DW_TAG_subprogram:
1149 case DW_TAG_subroutine_type: {
1150 // Set a bit that lets us know that we are currently parsing this
1151 dwarf->GetDIEToType()[die.GetDIE()] = DIE_IS_BEING_PARSED((lldb_private::Type *)1);
1152
1153 DWARFFormValue type_die_form;
1154 bool is_variadic = false;
1155 bool is_inline = false;
1156 bool is_static = false;
1157 bool is_virtual = false;
1158 bool is_explicit = false;
1159 bool is_artificial = false;
1160 bool has_template_params = false;
1161 DWARFFormValue specification_die_form;
1162 DWARFFormValue abstract_origin_die_form;
1163 dw_offset_t object_pointer_die_offset = DW_INVALID_OFFSET(~(dw_offset_t)0);
1164
1165 unsigned type_quals = 0;
1166 clang::StorageClass storage =
1167 clang::SC_None; //, Extern, Static, PrivateExtern
1168
1169 const size_t num_attributes = die.GetAttributes(attributes);
1170 if (num_attributes > 0) {
1171 uint32_t i;
1172 for (i = 0; i < num_attributes; ++i) {
1173 attr = attributes.AttributeAtIndex(i);
1174 if (attributes.ExtractFormValueAtIndex(i, form_value)) {
1175 switch (attr) {
1176 case DW_AT_decl_file:
1177 decl.SetFile(sc.comp_unit->GetSupportFiles().GetFileSpecAtIndex(
1178 form_value.Unsigned()));
1179 break;
1180 case DW_AT_decl_line:
1181 decl.SetLine(form_value.Unsigned());
1182 break;
1183 case DW_AT_decl_column:
1184 decl.SetColumn(form_value.Unsigned());
1185 break;
1186 case DW_AT_name:
1187 type_name_cstr = form_value.AsCString();
1188 type_name_const_str.SetCString(type_name_cstr);
1189 break;
1190
1191 case DW_AT_linkage_name:
1192 case DW_AT_MIPS_linkage_name:
1193 mangled_name_cstr = form_value.AsCString();
1194 break;
1195 case DW_AT_type:
1196 type_die_form = form_value;
1197 break;
1198 case DW_AT_accessibility:
1199 accessibility = DW_ACCESS_to_AccessType(form_value.Unsigned());
1200 break;
1201 case DW_AT_declaration:
1202 break; // is_forward_declaration = form_value.Boolean(); break;
1203 case DW_AT_inline:
1204 is_inline = form_value.Boolean();
1205 break;
1206 case DW_AT_virtuality:
1207 is_virtual = form_value.Boolean();
1208 break;
1209 case DW_AT_explicit:
1210 is_explicit = form_value.Boolean();
1211 break;
1212 case DW_AT_artificial:
1213 is_artificial = form_value.Boolean();
1214 break;
1215
1216 case DW_AT_external:
1217 if (form_value.Unsigned()) {
1218 if (storage == clang::SC_None)
1219 storage = clang::SC_Extern;
1220 else
1221 storage = clang::SC_PrivateExtern;
1222 }
1223 break;
1224
1225 case DW_AT_specification:
1226 specification_die_form = form_value;
1227 break;
1228
1229 case DW_AT_abstract_origin:
1230 abstract_origin_die_form = form_value;
1231 break;
1232
1233 case DW_AT_object_pointer:
1234 object_pointer_die_offset = form_value.Reference();
1235 break;
1236
1237 case DW_AT_allocated:
1238 case DW_AT_associated:
1239 case DW_AT_address_class:
1240 case DW_AT_calling_convention:
1241 case DW_AT_data_location:
1242 case DW_AT_elemental:
1243 case DW_AT_entry_pc:
1244 case DW_AT_frame_base:
1245 case DW_AT_high_pc:
1246 case DW_AT_low_pc:
1247 case DW_AT_prototyped:
1248 case DW_AT_pure:
1249 case DW_AT_ranges:
1250 case DW_AT_recursive:
1251 case DW_AT_return_addr:
1252 case DW_AT_segment:
1253 case DW_AT_start_scope:
1254 case DW_AT_static_link:
1255 case DW_AT_trampoline:
1256 case DW_AT_visibility:
1257 case DW_AT_vtable_elem_location:
1258 case DW_AT_description:
1259 case DW_AT_sibling:
1260 break;
1261 }
1262 }
1263 }
1264 }
1265
1266 std::string object_pointer_name;
1267 if (object_pointer_die_offset != DW_INVALID_OFFSET(~(dw_offset_t)0)) {
1268 DWARFDIE object_pointer_die = die.GetDIE(object_pointer_die_offset);
1269 if (object_pointer_die) {
1270 const char *object_pointer_name_cstr = object_pointer_die.GetName();
1271 if (object_pointer_name_cstr)
1272 object_pointer_name = object_pointer_name_cstr;
1273 }
1274 }
1275
1276 DEBUG_PRINTF("0x%8.8" PRIx64 ": %s (\"%s\")\n", die.GetID(),
1277 DW_TAG_value_to_name(tag), type_name_cstr);
1278
1279 CompilerType return_clang_type;
1280 Type *func_type = NULL__null;
1281
1282 if (type_die_form.IsValid())
1283 func_type = dwarf->ResolveTypeUID(DIERef(type_die_form));
1284
1285 if (func_type)
1286 return_clang_type = func_type->GetForwardCompilerType();
1287 else
1288 return_clang_type = m_ast.GetBasicType(eBasicTypeVoid);
1289
1290 std::vector<CompilerType> function_param_types;
1291 std::vector<clang::ParmVarDecl *> function_param_decls;
1292
1293 // Parse the function children for the parameters
1294
1295 DWARFDIE decl_ctx_die;
1296 clang::DeclContext *containing_decl_ctx =
1297 GetClangDeclContextContainingDIE(die, &decl_ctx_die);
1298 const clang::Decl::Kind containing_decl_kind =
1299 containing_decl_ctx->getDeclKind();
1300
1301 bool is_cxx_method = DeclKindIsCXXClass(containing_decl_kind);
1302 // Start off static. This will be set to false in
1303 // ParseChildParameters(...) if we find a "this" parameters as the
1304 // first parameter
1305 if (is_cxx_method) {
1306 is_static = true;
1307 }
1308
1309 if (die.HasChildren()) {
1310 bool skip_artificial = true;
1311 ParseChildParameters(sc, containing_decl_ctx, die, skip_artificial,
1312 is_static, is_variadic, has_template_params,
1313 function_param_types, function_param_decls,
1314 type_quals);
1315 }
1316
1317 bool ignore_containing_context = false;
1318 // Check for templatized class member functions. If we had any
1319 // DW_TAG_template_type_parameter or DW_TAG_template_value_parameter
1320 // the DW_TAG_subprogram DIE, then we can't let this become a method in
1321 // a class. Why? Because templatized functions are only emitted if one
1322 // of the templatized methods is used in the current compile unit and
1323 // we will end up with classes that may or may not include these member
1324 // functions and this means one class won't match another class
1325 // definition and it affects our ability to use a class in the clang
1326 // expression parser. So for the greater good, we currently must not
1327 // allow any template member functions in a class definition.
1328 if (is_cxx_method && has_template_params) {
1329 ignore_containing_context = true;
1330 is_cxx_method = false;
1331 }
1332
1333 // clang_type will get the function prototype clang type after this
1334 // call
1335 clang_type = m_ast.CreateFunctionType(
1336 return_clang_type, function_param_types.data(),
1337 function_param_types.size(), is_variadic, type_quals);
1338
1339 if (type_name_cstr) {
1340 bool type_handled = false;
1341 if (tag == DW_TAG_subprogram || tag == DW_TAG_inlined_subroutine) {
1342 ObjCLanguage::MethodName objc_method(type_name_cstr, true);
1343 if (objc_method.IsValid(true)) {
1344 CompilerType class_opaque_type;
1345 ConstString class_name(objc_method.GetClassName());
1346 if (class_name) {
1347 TypeSP complete_objc_class_type_sp(
1348 dwarf->FindCompleteObjCDefinitionTypeForDIE(
1349 DWARFDIE(), class_name, false));
1350
1351 if (complete_objc_class_type_sp) {
1352 CompilerType type_clang_forward_type =
1353 complete_objc_class_type_sp->GetForwardCompilerType();
1354 if (ClangASTContext::IsObjCObjectOrInterfaceType(
1355 type_clang_forward_type))
1356 class_opaque_type = type_clang_forward_type;
1357 }
1358 }
1359
1360 if (class_opaque_type) {
1361 // If accessibility isn't set to anything valid, assume public
1362 // for now...
1363 if (accessibility == eAccessNone)
1364 accessibility = eAccessPublic;
1365
1366 clang::ObjCMethodDecl *objc_method_decl =
1367 m_ast.AddMethodToObjCObjectType(
1368 class_opaque_type, type_name_cstr, clang_type,
1369 accessibility, is_artificial, is_variadic);
1370 type_handled = objc_method_decl != NULL__null;
1371 if (type_handled) {
1372 LinkDeclContextToDIE(
1373 ClangASTContext::GetAsDeclContext(objc_method_decl), die);
1374 m_ast.SetMetadataAsUserID(objc_method_decl, die.GetID());
1375 } else {
1376 dwarf->GetObjectFile()->GetModule()->ReportError(
1377 "{0x%8.8x}: invalid Objective-C method 0x%4.4x (%s), "
1378 "please file a bug and attach the file at the start of "
1379 "this error message",
1380 die.GetOffset(), tag, DW_TAG_value_to_name(tag));
1381 }
1382 }
1383 } else if (is_cxx_method) {
1384 // Look at the parent of this DIE and see if is is a class or
1385 // struct and see if this is actually a C++ method
1386 Type *class_type = dwarf->ResolveType(decl_ctx_die);
1387 if (class_type) {
1388 bool alternate_defn = false;
1389 if (class_type->GetID() != decl_ctx_die.GetID() ||
1390 decl_ctx_die.GetContainingDWOModuleDIE()) {
1391 alternate_defn = true;
1392
1393 // We uniqued the parent class of this function to another
1394 // class so we now need to associate all dies under
1395 // "decl_ctx_die" to DIEs in the DIE for "class_type"...
1396 SymbolFileDWARF *class_symfile = NULL__null;
1397 DWARFDIE class_type_die;
1398
1399 SymbolFileDWARFDebugMap *debug_map_symfile =
1400 dwarf->GetDebugMapSymfile();
1401 if (debug_map_symfile) {
1402 class_symfile = debug_map_symfile->GetSymbolFileByOSOIndex(
1403 SymbolFileDWARFDebugMap::GetOSOIndexFromUserID(
1404 class_type->GetID()));
1405 class_type_die = class_symfile->DebugInfo()->GetDIE(
1406 DIERef(class_type->GetID(), dwarf));
1407 } else {
1408 class_symfile = dwarf;
1409 class_type_die = dwarf->DebugInfo()->GetDIE(
1410 DIERef(class_type->GetID(), dwarf));
1411 }
1412 if (class_type_die) {
1413 DWARFDIECollection failures;
1414
1415 CopyUniqueClassMethodTypes(decl_ctx_die, class_type_die,
1416 class_type, failures);
1417
1418 // FIXME do something with these failures that's smarter
1419 // than
1420 // just dropping them on the ground. Unfortunately classes
1421 // don't like having stuff added to them after their
1422 // definitions are complete...
1423
1424 type_ptr = dwarf->GetDIEToType()[die.GetDIE()];
1425 if (type_ptr && type_ptr != DIE_IS_BEING_PARSED((lldb_private::Type *)1)) {
1426 type_sp = type_ptr->shared_from_this();
1427 break;
1428 }
1429 }
1430 }
1431
1432 if (specification_die_form.IsValid()) {
1433 // We have a specification which we are going to base our
1434 // function prototype off of, so we need this type to be
1435 // completed so that the m_die_to_decl_ctx for the method in
1436 // the specification has a valid clang decl context.
1437 class_type->GetForwardCompilerType();
1438 // If we have a specification, then the function type should
1439 // have been made with the specification and not with this
1440 // die.
1441 DWARFDIE spec_die = dwarf->DebugInfo()->GetDIE(
1442 DIERef(specification_die_form));
1443 clang::DeclContext *spec_clang_decl_ctx =
1444 GetClangDeclContextForDIE(spec_die);
1445 if (spec_clang_decl_ctx) {
1446 LinkDeclContextToDIE(spec_clang_decl_ctx, die);
1447 } else {
1448 dwarf->GetObjectFile()->GetModule()->ReportWarning(
1449 "0x%8.8" PRIx64"l" "x" ": DW_AT_specification(0x%8.8" PRIx64"l" "x"
1450 ") has no decl\n",
1451 die.GetID(), specification_die_form.Reference());
1452 }
1453 type_handled = true;
1454 } else if (abstract_origin_die_form.IsValid()) {
1455 // We have a specification which we are going to base our
1456 // function prototype off of, so we need this type to be
1457 // completed so that the m_die_to_decl_ctx for the method in
1458 // the abstract origin has a valid clang decl context.
1459 class_type->GetForwardCompilerType();
1460
1461 DWARFDIE abs_die = dwarf->DebugInfo()->GetDIE(
1462 DIERef(abstract_origin_die_form));
1463 clang::DeclContext *abs_clang_decl_ctx =
1464 GetClangDeclContextForDIE(abs_die);
1465 if (abs_clang_decl_ctx) {
1466 LinkDeclContextToDIE(abs_clang_decl_ctx, die);
1467 } else {
1468 dwarf->GetObjectFile()->GetModule()->ReportWarning(
1469 "0x%8.8" PRIx64"l" "x" ": DW_AT_abstract_origin(0x%8.8" PRIx64"l" "x"
1470 ") has no decl\n",
1471 die.GetID(), abstract_origin_die_form.Reference());
1472 }
1473 type_handled = true;
1474 } else {
1475 CompilerType class_opaque_type =
1476 class_type->GetForwardCompilerType();
1477 if (ClangASTContext::IsCXXClassType(class_opaque_type)) {
1478 if (class_opaque_type.IsBeingDefined() || alternate_defn) {
1479 if (!is_static && !die.HasChildren()) {
1480 // We have a C++ member function with no children (this
1481 // pointer!) and clang will get mad if we try and make
1482 // a function that isn't well formed in the DWARF, so
1483 // we will just skip it...
1484 type_handled = true;
1485 } else {
1486 bool add_method = true;
1487 if (alternate_defn) {
1488 // If an alternate definition for the class exists,
1489 // then add the method only if an equivalent is not
1490 // already present.
1491 clang::CXXRecordDecl *record_decl =
1492 m_ast.GetAsCXXRecordDecl(
1493 class_opaque_type.GetOpaqueQualType());
1494 if (record_decl) {
1495 for (auto method_iter = record_decl->method_begin();
1496 method_iter != record_decl->method_end();
1497 method_iter++) {
1498 clang::CXXMethodDecl *method_decl = *method_iter;
1499 if (method_decl->getNameInfo().getAsString() ==
1500 std::string(type_name_cstr)) {
1501 if (method_decl->getType() ==
1502 ClangUtil::GetQualType(clang_type)) {
1503 add_method = false;
1504 LinkDeclContextToDIE(
1505 ClangASTContext::GetAsDeclContext(
1506 method_decl),
1507 die);
1508 type_handled = true;
1509
1510 break;
1511 }
1512 }
1513 }
1514 }
1515 }
1516
1517 if (add_method) {
1518 llvm::PrettyStackTraceFormat stack_trace(
1519 "SymbolFileDWARF::ParseType() is adding a method "
1520 "%s to class %s in DIE 0x%8.8" PRIx64"l" "x" " from %s",
1521 type_name_cstr,
1522 class_type->GetName().GetCString(), die.GetID(),
1523 dwarf->GetObjectFile()
1524 ->GetFileSpec()
1525 .GetPath()
1526 .c_str());
1527
1528 const bool is_attr_used = false;
1529 // Neither GCC 4.2 nor clang++ currently set a valid
1530 // accessibility in the DWARF for C++ methods...
1531 // Default to public for now...
1532 if (accessibility == eAccessNone)
1533 accessibility = eAccessPublic;
1534
1535 clang::CXXMethodDecl *cxx_method_decl =
1536 m_ast.AddMethodToCXXRecordType(
1537 class_opaque_type.GetOpaqueQualType(),
1538 type_name_cstr, mangled_name_cstr, clang_type,
1539 accessibility, is_virtual, is_static,
1540 is_inline, is_explicit, is_attr_used,
1541 is_artificial);
1542
1543 type_handled = cxx_method_decl != NULL__null;
1544
1545 if (type_handled) {
1546 LinkDeclContextToDIE(
1547 ClangASTContext::GetAsDeclContext(
1548 cxx_method_decl),
1549 die);
1550
1551 ClangASTMetadata metadata;
1552 metadata.SetUserID(die.GetID());
1553
1554 if (!object_pointer_name.empty()) {
1555 metadata.SetObjectPtrName(
1556 object_pointer_name.c_str());
1557 if (log)
1558 log->Printf(
1559 "Setting object pointer name: %s on method "
1560 "object %p.\n",
1561 object_pointer_name.c_str(),
1562 static_cast<void *>(cxx_method_decl));
1563 }
1564 m_ast.SetMetadata(cxx_method_decl, metadata);
1565 } else {
1566 ignore_containing_context = true;
1567 }
1568 }
1569 }
1570 } else {
1571 // We were asked to parse the type for a method in a
1572 // class, yet the class hasn't been asked to complete
1573 // itself through the clang::ExternalASTSource protocol,
1574 // so we need to just have the class complete itself and
1575 // do things the right way, then our
1576 // DIE should then have an entry in the
1577 // dwarf->GetDIEToType() map. First
1578 // we need to modify the dwarf->GetDIEToType() so it
1579 // doesn't think we are trying to parse this DIE
1580 // anymore...
1581 dwarf->GetDIEToType()[die.GetDIE()] = NULL__null;
1582
1583 // Now we get the full type to force our class type to
1584 // complete itself using the clang::ExternalASTSource
1585 // protocol which will parse all base classes and all
1586 // methods (including the method for this DIE).
1587 class_type->GetFullCompilerType();
1588
1589 // The type for this DIE should have been filled in the
1590 // function call above
1591 type_ptr = dwarf->GetDIEToType()[die.GetDIE()];
1592 if (type_ptr && type_ptr != DIE_IS_BEING_PARSED((lldb_private::Type *)1)) {
1593 type_sp = type_ptr->shared_from_this();
1594 break;
1595 }
1596
1597 // FIXME This is fixing some even uglier behavior but we
1598 // really need to
1599 // uniq the methods of each class as well as the class
1600 // itself. <rdar://problem/11240464>
1601 type_handled = true;
1602 }
1603 }
1604 }
1605 }
1606 }
1607 }
1608
1609 if (!type_handled) {
1610 clang::FunctionDecl *function_decl = nullptr;
1611
1612 if (abstract_origin_die_form.IsValid()) {
1613 DWARFDIE abs_die =
1614 dwarf->DebugInfo()->GetDIE(DIERef(abstract_origin_die_form));
1615
1616 SymbolContext sc;
1617
1618 if (dwarf->ResolveType(abs_die)) {
1619 function_decl = llvm::dyn_cast_or_null<clang::FunctionDecl>(
1620 GetCachedClangDeclContextForDIE(abs_die));
1621
1622 if (function_decl) {
1623 LinkDeclContextToDIE(function_decl, die);
1624 }
1625 }
1626 }
1627
1628 if (!function_decl) {
1629 // We just have a function that isn't part of a class
1630 function_decl = m_ast.CreateFunctionDeclaration(
1631 ignore_containing_context ? m_ast.GetTranslationUnitDecl()
1632 : containing_decl_ctx,
1633 type_name_cstr, clang_type, storage, is_inline);
1634
1635 if (has_template_params) {
1636 ClangASTContext::TemplateParameterInfos template_param_infos;
1637 ParseTemplateParameterInfos(die, template_param_infos);
1638 clang::FunctionTemplateDecl *func_template_decl =
1639 m_ast.CreateFunctionTemplateDecl(
1640 containing_decl_ctx, function_decl, type_name_cstr,
1641 template_param_infos);
1642 m_ast.CreateFunctionTemplateSpecializationInfo(
1643 function_decl, func_template_decl, template_param_infos);
1644 }
1645
1646 lldbassert(function_decl)lldb_private::lldb_assert(function_decl, "function_decl", __FUNCTION__
, "/build/llvm-toolchain-snapshot-7~svn338205/tools/lldb/source/Plugins/SymbolFile/DWARF/DWARFASTParserClang.cpp"
, 1646)
;
1647
1648 if (function_decl) {
1649 LinkDeclContextToDIE(function_decl, die);
1650
1651 if (!function_param_decls.empty())
1652 m_ast.SetFunctionParameters(function_decl,
1653 &function_param_decls.front(),
1654 function_param_decls.size());
1655
1656 ClangASTMetadata metadata;
1657 metadata.SetUserID(die.GetID());
1658
1659 if (!object_pointer_name.empty()) {
1660 metadata.SetObjectPtrName(object_pointer_name.c_str());
1661 if (log)
1662 log->Printf("Setting object pointer name: %s on function "
1663 "object %p.",
1664 object_pointer_name.c_str(),
1665 static_cast<void *>(function_decl));
1666 }
1667 m_ast.SetMetadata(function_decl, metadata);
1668 }
1669 }
1670 }
1671 }
1672 type_sp.reset(new Type(die.GetID(), dwarf, type_name_const_str, 0, NULL__null,
1673 LLDB_INVALID_UID(18446744073709551615UL), Type::eEncodingIsUID, &decl,
1674 clang_type, Type::eResolveStateFull));
1675 assert(type_sp.get())(static_cast <bool> (type_sp.get()) ? void (0) : __assert_fail
("type_sp.get()", "/build/llvm-toolchain-snapshot-7~svn338205/tools/lldb/source/Plugins/SymbolFile/DWARF/DWARFASTParserClang.cpp"
, 1675, __extension__ __PRETTY_FUNCTION__))
;
1676 } break;
1677
1678 case DW_TAG_array_type: {
1679 // Set a bit that lets us know that we are currently parsing this
1680 dwarf->GetDIEToType()[die.GetDIE()] = DIE_IS_BEING_PARSED((lldb_private::Type *)1);
1681
1682 DWARFFormValue type_die_form;
1683 int64_t first_index = 0;
1684 uint32_t byte_stride = 0;
1685 uint32_t bit_stride = 0;
1686 bool is_vector = false;
1687 const size_t num_attributes = die.GetAttributes(attributes);
1688
1689 if (num_attributes > 0) {
1690 uint32_t i;
1691 for (i = 0; i < num_attributes; ++i) {
1692 attr = attributes.AttributeAtIndex(i);
1693 if (attributes.ExtractFormValueAtIndex(i, form_value)) {
1694 switch (attr) {
1695 case DW_AT_decl_file:
1696 decl.SetFile(sc.comp_unit->GetSupportFiles().GetFileSpecAtIndex(
1697 form_value.Unsigned()));
1698 break;
1699 case DW_AT_decl_line:
1700 decl.SetLine(form_value.Unsigned());
1701 break;
1702 case DW_AT_decl_column:
1703 decl.SetColumn(form_value.Unsigned());
1704 break;
1705 case DW_AT_name:
1706 type_name_cstr = form_value.AsCString();
1707 type_name_const_str.SetCString(type_name_cstr);
1708 break;
1709
1710 case DW_AT_type:
1711 type_die_form = form_value;
1712 break;
1713 case DW_AT_byte_size:
1714 break; // byte_size = form_value.Unsigned(); break;
1715 case DW_AT_byte_stride:
1716 byte_stride = form_value.Unsigned();
1717 break;
1718 case DW_AT_bit_stride:
1719 bit_stride = form_value.Unsigned();
1720 break;
1721 case DW_AT_GNU_vector:
1722 is_vector = form_value.Boolean();
1723 break;
1724 case DW_AT_accessibility:
1725 break; // accessibility =
1726 // DW_ACCESS_to_AccessType(form_value.Unsigned()); break;
1727 case DW_AT_declaration:
1728 break; // is_forward_declaration = form_value.Boolean(); break;
1729 case DW_AT_allocated:
1730 case DW_AT_associated:
1731 case DW_AT_data_location:
1732 case DW_AT_description:
1733 case DW_AT_ordering:
1734 case DW_AT_start_scope:
1735 case DW_AT_visibility:
1736 case DW_AT_specification:
1737 case DW_AT_abstract_origin:
1738 case DW_AT_sibling:
1739 break;
1740 }
1741 }
1742 }
1743
1744 DEBUG_PRINTF("0x%8.8" PRIx64 ": %s (\"%s\")\n", die.GetID(),
1745 DW_TAG_value_to_name(tag), type_name_cstr);
1746
1747 DIERef type_die_ref(type_die_form);
1748 Type *element_type = dwarf->ResolveTypeUID(type_die_ref);
1749
1750 if (element_type) {
1751 std::vector<uint64_t> element_orders;
1752 ParseChildArrayInfo(sc, die, first_index, element_orders,
1753 byte_stride, bit_stride);
1754 if (byte_stride == 0 && bit_stride == 0)
1755 byte_stride = element_type->GetByteSize();
1756 CompilerType array_element_type =
1757 element_type->GetForwardCompilerType();
1758
1759 if (ClangASTContext::IsCXXClassType(array_element_type) &&
1760 array_element_type.GetCompleteType() == false) {
1761 ModuleSP module_sp = die.GetModule();
1762 if (module_sp) {
1763 if (die.GetCU()->GetProducer() == eProducerClang)
1764 module_sp->ReportError(
1765 "DWARF DW_TAG_array_type DIE at 0x%8.8x has a "
1766 "class/union/struct element type DIE 0x%8.8x that is a "
1767 "forward declaration, not a complete definition.\nTry "
1768 "compiling the source file with -fstandalone-debug or "
1769 "disable -gmodules",
1770 die.GetOffset(), type_die_ref.die_offset);
1771 else
1772 module_sp->ReportError(
1773 "DWARF DW_TAG_array_type DIE at 0x%8.8x has a "
1774 "class/union/struct element type DIE 0x%8.8x that is a "
1775 "forward declaration, not a complete definition.\nPlease "
1776 "file a bug against the compiler and include the "
1777 "preprocessed output for %s",
1778 die.GetOffset(), type_die_ref.die_offset,
1779 die.GetLLDBCompileUnit()
1780 ? die.GetLLDBCompileUnit()->GetPath().c_str()
1781 : "the source file");
1782 }
1783
1784 // We have no choice other than to pretend that the element class
1785 // type is complete. If we don't do this, clang will crash when
1786 // trying to layout the class. Since we provide layout
1787 // assistance, all ivars in this class and other classes will be
1788 // fine, this is the best we can do short of crashing.
1789 if (ClangASTContext::StartTagDeclarationDefinition(
1790 array_element_type)) {
1791 ClangASTContext::CompleteTagDeclarationDefinition(
1792 array_element_type);
1793 } else {
1794 module_sp->ReportError("DWARF DIE at 0x%8.8x was not able to "
1795 "start its definition.\nPlease file a "
1796 "bug and attach the file at the start "
1797 "of this error message",
1798 type_die_ref.die_offset);
1799 }
1800 }
1801
1802 uint64_t array_element_bit_stride = byte_stride * 8 + bit_stride;
1803 if (element_orders.size() > 0) {
1804 uint64_t num_elements = 0;
1805 std::vector<uint64_t>::const_reverse_iterator pos;
1806 std::vector<uint64_t>::const_reverse_iterator end =
1807 element_orders.rend();
1808 for (pos = element_orders.rbegin(); pos != end; ++pos) {
1809 num_elements = *pos;
1810 clang_type = m_ast.CreateArrayType(array_element_type,
1811 num_elements, is_vector);
1812 array_element_type = clang_type;
1813 array_element_bit_stride =
1814 num_elements ? array_element_bit_stride * num_elements
1815 : array_element_bit_stride;
1816 }
1817 } else {
1818 clang_type =
1819 m_ast.CreateArrayType(array_element_type, 0, is_vector);
1820 }
1821 ConstString empty_name;
1822 type_sp.reset(new Type(
1823 die.GetID(), dwarf, empty_name, array_element_bit_stride / 8,
1824 NULL__null, DIERef(type_die_form).GetUID(dwarf), Type::eEncodingIsUID,
1825 &decl, clang_type, Type::eResolveStateFull));
1826 type_sp->SetEncodingType(element_type);
1827 }
1828 }
1829 } break;
1830
1831 case DW_TAG_ptr_to_member_type: {
1832 DWARFFormValue type_die_form;
1833 DWARFFormValue containing_type_die_form;
1834
1835 const size_t num_attributes = die.GetAttributes(attributes);
1836
1837 if (num_attributes > 0) {
1838 uint32_t i;
1839 for (i = 0; i < num_attributes; ++i) {
1840 attr = attributes.AttributeAtIndex(i);
1841 if (attributes.ExtractFormValueAtIndex(i, form_value)) {
1842 switch (attr) {
1843 case DW_AT_type:
1844 type_die_form = form_value;
1845 break;
1846 case DW_AT_containing_type:
1847 containing_type_die_form = form_value;
1848 break;
1849 }
1850 }
1851 }
1852
1853 Type *pointee_type = dwarf->ResolveTypeUID(DIERef(type_die_form));
1854 Type *class_type =
1855 dwarf->ResolveTypeUID(DIERef(containing_type_die_form));
1856
1857 CompilerType pointee_clang_type =
1858 pointee_type->GetForwardCompilerType();
1859 CompilerType class_clang_type = class_type->GetLayoutCompilerType();
1860
1861 clang_type = ClangASTContext::CreateMemberPointerType(
1862 class_clang_type, pointee_clang_type);
1863
1864 byte_size = clang_type.GetByteSize(nullptr);
1865
1866 type_sp.reset(new Type(die.GetID(), dwarf, type_name_const_str,
1867 byte_size, NULL__null, LLDB_INVALID_UID(18446744073709551615UL),
1868 Type::eEncodingIsUID, NULL__null, clang_type,
1869 Type::eResolveStateForward));
1870 }
1871
1872 break;
1873 }
1874 default:
1875 dwarf->GetObjectFile()->GetModule()->ReportError(
1876 "{0x%8.8x}: unhandled type tag 0x%4.4x (%s), please file a bug and "
1877 "attach the file at the start of this error message",
1878 die.GetOffset(), tag, DW_TAG_value_to_name(tag));
1879 break;
1880 }
1881
1882 if (type_sp.get()) {
1883 DWARFDIE sc_parent_die =
1884 SymbolFileDWARF::GetParentSymbolContextDIE(die);
1885 dw_tag_t sc_parent_tag = sc_parent_die.Tag();
1886
1887 SymbolContextScope *symbol_context_scope = NULL__null;
1888 if (sc_parent_tag == DW_TAG_compile_unit ||
1889 sc_parent_tag == DW_TAG_partial_unit) {
1890 symbol_context_scope = sc.comp_unit;
1891 } else if (sc.function != NULL__null && sc_parent_die) {
1892 symbol_context_scope =
1893 sc.function->GetBlock(true).FindBlockByID(sc_parent_die.GetID());
1894 if (symbol_context_scope == NULL__null)
1895 symbol_context_scope = sc.function;
1896 }
1897
1898 if (symbol_context_scope != NULL__null) {
1899 type_sp->SetSymbolContextScope(symbol_context_scope);
1900 }
1901
1902 // We are ready to put this type into the uniqued list up at the module
1903 // level
1904 type_list->Insert(type_sp);
1905
1906 dwarf->GetDIEToType()[die.GetDIE()] = type_sp.get();
1907 }
1908 } else if (type_ptr != DIE_IS_BEING_PARSED((lldb_private::Type *)1)) {
1909 type_sp = type_ptr->shared_from_this();
1910 }
1911 }
1912 return type_sp;
1913}
1914
1915// DWARF parsing functions
1916
1917class DWARFASTParserClang::DelayedAddObjCClassProperty {
1918public:
1919 DelayedAddObjCClassProperty(
1920 const CompilerType &class_opaque_type, const char *property_name,
1921 const CompilerType &property_opaque_type, // The property type is only
1922 // required if you don't have an
1923 // ivar decl
1924 clang::ObjCIvarDecl *ivar_decl, const char *property_setter_name,
1925 const char *property_getter_name, uint32_t property_attributes,
1926 const ClangASTMetadata *metadata)
1927 : m_class_opaque_type(class_opaque_type), m_property_name(property_name),
1928 m_property_opaque_type(property_opaque_type), m_ivar_decl(ivar_decl),
1929 m_property_setter_name(property_setter_name),
1930 m_property_getter_name(property_getter_name),
1931 m_property_attributes(property_attributes) {
1932 if (metadata != NULL__null) {
1933 m_metadata_ap.reset(new ClangASTMetadata());
1934 *m_metadata_ap = *metadata;
1935 }
1936 }
1937
1938 DelayedAddObjCClassProperty(const DelayedAddObjCClassProperty &rhs) {
1939 *this = rhs;
1940 }
1941
1942 DelayedAddObjCClassProperty &
1943 operator=(const DelayedAddObjCClassProperty &rhs) {
1944 m_class_opaque_type = rhs.m_class_opaque_type;
1945 m_property_name = rhs.m_property_name;
1946 m_property_opaque_type = rhs.m_property_opaque_type;
1947 m_ivar_decl = rhs.m_ivar_decl;
1948 m_property_setter_name = rhs.m_property_setter_name;
1949 m_property_getter_name = rhs.m_property_getter_name;
1950 m_property_attributes = rhs.m_property_attributes;
1951
1952 if (rhs.m_metadata_ap.get()) {
1953 m_metadata_ap.reset(new ClangASTMetadata());
1954 *m_metadata_ap = *rhs.m_metadata_ap;
1955 }
1956 return *this;
1957 }
1958
1959 bool Finalize() {
1960 return ClangASTContext::AddObjCClassProperty(
1961 m_class_opaque_type, m_property_name, m_property_opaque_type,
1962 m_ivar_decl, m_property_setter_name, m_property_getter_name,
1963 m_property_attributes, m_metadata_ap.get());
1964 }
1965
1966private:
1967 CompilerType m_class_opaque_type;
1968 const char *m_property_name;
1969 CompilerType m_property_opaque_type;
1970 clang::ObjCIvarDecl *m_ivar_decl;
1971 const char *m_property_setter_name;
1972 const char *m_property_getter_name;
1973 uint32_t m_property_attributes;
1974 std::unique_ptr<ClangASTMetadata> m_metadata_ap;
1975};
1976
1977bool DWARFASTParserClang::ParseTemplateDIE(
1978 const DWARFDIE &die,
1979 ClangASTContext::TemplateParameterInfos &template_param_infos) {
1980 const dw_tag_t tag = die.Tag();
1981 bool is_template_template_argument = false;
1982
1983 switch (tag) {
1984 case DW_TAG_GNU_template_parameter_pack: {
1985 template_param_infos.packed_args.reset(
1986 new ClangASTContext::TemplateParameterInfos);
1987 for (DWARFDIE child_die = die.GetFirstChild(); child_die.IsValid();
1988 child_die = child_die.GetSibling()) {
1989 if (!ParseTemplateDIE(child_die, *template_param_infos.packed_args))
1990 return false;
1991 }
1992 if (const char *name = die.GetName()) {
1993 template_param_infos.pack_name = name;
1994 }
1995 return true;
1996 }
1997 case DW_TAG_GNU_template_template_param:
1998 is_template_template_argument = true;
1999 LLVM_FALLTHROUGH[[clang::fallthrough]];
2000 case DW_TAG_template_type_parameter:
2001 case DW_TAG_template_value_parameter: {
2002 DWARFAttributes attributes;
2003 const size_t num_attributes = die.GetAttributes(attributes);
2004 const char *name = nullptr;
2005 const char *template_name = nullptr;
2006 CompilerType clang_type;
2007 uint64_t uval64 = 0;
2008 bool uval64_valid = false;
2009 if (num_attributes > 0) {
2010 DWARFFormValue form_value;
2011 for (size_t i = 0; i < num_attributes; ++i) {
2012 const dw_attr_t attr = attributes.AttributeAtIndex(i);
2013
2014 switch (attr) {
2015 case DW_AT_name:
2016 if (attributes.ExtractFormValueAtIndex(i, form_value))
2017 name = form_value.AsCString();
2018 break;
2019
2020 case DW_AT_GNU_template_name:
2021 if (attributes.ExtractFormValueAtIndex(i, form_value))
2022 template_name = form_value.AsCString();
2023 break;
2024
2025 case DW_AT_type:
2026 if (attributes.ExtractFormValueAtIndex(i, form_value)) {
2027 Type *lldb_type = die.ResolveTypeUID(DIERef(form_value));
2028 if (lldb_type)
2029 clang_type = lldb_type->GetForwardCompilerType();
2030 }
2031 break;
2032
2033 case DW_AT_const_value:
2034 if (attributes.ExtractFormValueAtIndex(i, form_value)) {
2035 uval64_valid = true;
2036 uval64 = form_value.Unsigned();
2037 }
2038 break;
2039 default:
2040 break;
2041 }
2042 }
2043
2044 clang::ASTContext *ast = m_ast.getASTContext();
2045 if (!clang_type)
2046 clang_type = m_ast.GetBasicType(eBasicTypeVoid);
2047
2048 if (!is_template_template_argument) {
2049 bool is_signed = false;
2050 if (name && name[0])
2051 template_param_infos.names.push_back(name);
2052 else
2053 template_param_infos.names.push_back(NULL__null);
2054
2055 // Get the signed value for any integer or enumeration if available
2056 clang_type.IsIntegerOrEnumerationType(is_signed);
2057
2058 if (tag == DW_TAG_template_value_parameter && uval64_valid) {
2059 llvm::APInt apint(clang_type.GetBitSize(nullptr), uval64, is_signed);
2060 template_param_infos.args.push_back(
2061 clang::TemplateArgument(*ast, llvm::APSInt(apint, !is_signed),
2062 ClangUtil::GetQualType(clang_type)));
2063 } else {
2064 template_param_infos.args.push_back(
2065 clang::TemplateArgument(ClangUtil::GetQualType(clang_type)));
2066 }
2067 } else {
2068 auto *tplt_type = m_ast.CreateTemplateTemplateParmDecl(template_name);
2069 template_param_infos.names.push_back(name);
2070 template_param_infos.args.push_back(
2071 clang::TemplateArgument(clang::TemplateName(tplt_type)));
2072 }
2073 }
2074 }
2075 return true;
2076
2077 default:
2078 break;
2079 }
2080 return false;
2081}
2082
2083bool DWARFASTParserClang::ParseTemplateParameterInfos(
2084 const DWARFDIE &parent_die,
2085 ClangASTContext::TemplateParameterInfos &template_param_infos) {
2086
2087 if (!parent_die)
2088 return false;
2089
2090 for (DWARFDIE die = parent_die.GetFirstChild(); die.IsValid();
2091 die = die.GetSibling()) {
2092 const dw_tag_t tag = die.Tag();
2093
2094 switch (tag) {
2095 case DW_TAG_template_type_parameter:
2096 case DW_TAG_template_value_parameter:
2097 case DW_TAG_GNU_template_parameter_pack:
2098 case DW_TAG_GNU_template_template_param:
2099 ParseTemplateDIE(die, template_param_infos);
2100 break;
2101
2102 default:
2103 break;
2104 }
2105 }
2106 if (template_param_infos.args.empty())
2107 return false;
2108 return template_param_infos.args.size() == template_param_infos.names.size();
2109}
2110
2111// Checks whether m1 is an overload of m2 (as opposed to an override). This is
2112// called by addOverridesForMethod to distinguish overrides (which share a
2113// vtable entry) from overloads (which require distinct entries).
2114static bool isOverload(clang::CXXMethodDecl *m1, clang::CXXMethodDecl *m2) {
2115 // FIXME: This should detect covariant return types, but currently doesn't.
2116 lldbassert(&m1->getASTContext() == &m2->getASTContext() &&lldb_private::lldb_assert(&m1->getASTContext() == &
m2->getASTContext() && "Methods should have the same AST context"
, "&m1->getASTContext() == &m2->getASTContext() && \"Methods should have the same AST context\""
, __FUNCTION__, "/build/llvm-toolchain-snapshot-7~svn338205/tools/lldb/source/Plugins/SymbolFile/DWARF/DWARFASTParserClang.cpp"
, 2117)
2117 "Methods should have the same AST context")lldb_private::lldb_assert(&m1->getASTContext() == &
m2->getASTContext() && "Methods should have the same AST context"
, "&m1->getASTContext() == &m2->getASTContext() && \"Methods should have the same AST context\""
, __FUNCTION__, "/build/llvm-toolchain-snapshot-7~svn338205/tools/lldb/source/Plugins/SymbolFile/DWARF/DWARFASTParserClang.cpp"
, 2117)
;
2118 clang::ASTContext &context = m1->getASTContext();
2119
2120 const auto *m1Type =
2121 llvm::cast<clang::FunctionProtoType>(
2122 context.getCanonicalType(m1->getType()));
2123
2124 const auto *m2Type =
2125 llvm::cast<clang::FunctionProtoType>(
2126 context.getCanonicalType(m2->getType()));
2127
2128 auto compareArgTypes =
2129 [&context](const clang::QualType &m1p, const clang::QualType &m2p) {
2130 return context.hasSameType(m1p.getUnqualifiedType(),
2131 m2p.getUnqualifiedType());
2132 };
2133
2134 // FIXME: In C++14 and later, we can just pass m2Type->param_type_end()
2135 // as a fourth parameter to std::equal().
2136 return (m1->getNumParams() != m2->getNumParams()) ||
2137 !std::equal(m1Type->param_type_begin(), m1Type->param_type_end(),
2138 m2Type->param_type_begin(), compareArgTypes);
2139}
2140
2141// If decl is a virtual method, walk the base classes looking for methods that
2142// decl overrides. This table of overridden methods is used by IRGen to
2143// determine the vtable layout for decl's parent class.
2144static void addOverridesForMethod(clang::CXXMethodDecl *decl) {
2145 if (!decl->isVirtual())
2146 return;
2147
2148 clang::CXXBasePaths paths;
2149
2150 auto find_overridden_methods =
2151 [decl](const clang::CXXBaseSpecifier *specifier, clang::CXXBasePath &path) {
2152 if (auto *base_record =
2153 llvm::dyn_cast<clang::CXXRecordDecl>(
2154 specifier->getType()->getAs<clang::RecordType>()->getDecl())) {
2155
2156 clang::DeclarationName name = decl->getDeclName();
2157
2158 // If this is a destructor, check whether the base class destructor is
2159 // virtual.
2160 if (name.getNameKind() == clang::DeclarationName::CXXDestructorName)
2161 if (auto *baseDtorDecl = base_record->getDestructor()) {
2162 if (baseDtorDecl->isVirtual()) {
2163 path.Decls = baseDtorDecl;
2164 return true;
2165 } else
2166 return false;
2167 }
2168
2169 // Otherwise, search for name in the base class.
2170 for (path.Decls = base_record->lookup(name); !path.Decls.empty();
2171 path.Decls = path.Decls.slice(1)) {
2172 if (auto *method_decl =
2173 llvm::dyn_cast<clang::CXXMethodDecl>(path.Decls.front()))
2174 if (method_decl->isVirtual() && !isOverload(decl, method_decl)) {
2175 path.Decls = method_decl;
2176 return true;
2177 }
2178 }
2179 }
2180
2181 return false;
2182 };
2183
2184 if (decl->getParent()->lookupInBases(find_overridden_methods, paths)) {
2185 for (auto *overridden_decl : paths.found_decls())
2186 decl->addOverriddenMethod(
2187 llvm::cast<clang::CXXMethodDecl>(overridden_decl));
2188 }
2189}
2190
2191// If clang_type is a CXXRecordDecl, builds the method override list for each
2192// of its virtual methods.
2193static void addMethodOverrides(ClangASTContext &ast, CompilerType &clang_type) {
2194 if (auto *record =
2195 ast.GetAsCXXRecordDecl(clang_type.GetOpaqueQualType()))
2196 for (auto *method : record->methods())
2197 addOverridesForMethod(method);
2198}
2199
2200bool DWARFASTParserClang::CompleteTypeFromDWARF(const DWARFDIE &die,
2201 lldb_private::Type *type,
2202 CompilerType &clang_type) {
2203 SymbolFileDWARF *dwarf = die.GetDWARF();
2204
2205 std::lock_guard<std::recursive_mutex> guard(
2206 dwarf->GetObjectFile()->GetModule()->GetMutex());
2207
2208 // Disable external storage for this type so we don't get anymore
2209 // clang::ExternalASTSource queries for this type.
2210 m_ast.SetHasExternalStorage(clang_type.GetOpaqueQualType(), false);
2211
2212 if (!die)
2213 return false;
2214
2215#if defined LLDB_CONFIGURATION_DEBUG
2216 //----------------------------------------------------------------------
2217 // For debugging purposes, the LLDB_DWARF_DONT_COMPLETE_TYPENAMES environment
2218 // variable can be set with one or more typenames separated by ';'
2219 // characters. This will cause this function to not complete any types whose
2220 // names match.
2221 //
2222 // Examples of setting this environment variable:
2223 //
2224 // LLDB_DWARF_DONT_COMPLETE_TYPENAMES=Foo
2225 // LLDB_DWARF_DONT_COMPLETE_TYPENAMES=Foo;Bar;Baz
2226 //----------------------------------------------------------------------
2227 const char *dont_complete_typenames_cstr =
2228 getenv("LLDB_DWARF_DONT_COMPLETE_TYPENAMES");
2229 if (dont_complete_typenames_cstr && dont_complete_typenames_cstr[0]) {
2230 const char *die_name = die.GetName();
2231 if (die_name && die_name[0]) {
2232 const char *match = strstr(dont_complete_typenames_cstr, die_name);
2233 if (match) {
2234 size_t die_name_length = strlen(die_name);
2235 while (match) {
2236 const char separator_char = ';';
2237 const char next_char = match[die_name_length];
2238 if (next_char == '\0' || next_char == separator_char) {
2239 if (match == dont_complete_typenames_cstr ||
2240 match[-1] == separator_char)
2241 return false;
2242 }
2243 match = strstr(match + 1, die_name);
2244 }
2245 }
2246 }
2247 }
2248#endif
2249
2250 const dw_tag_t tag = die.Tag();
2251
2252 Log *log =
2253 nullptr; // (LogChannelDWARF::GetLogIfAny(DWARF_LOG_DEBUG_INFO|DWARF_LOG_TYPE_COMPLETION));
2254 if (log)
2255 dwarf->GetObjectFile()->GetModule()->LogMessageVerboseBacktrace(
2256 log, "0x%8.8" PRIx64"l" "x" ": %s '%s' resolving forward declaration...",
2257 die.GetID(), die.GetTagAsCString(), type->GetName().AsCString());
2258 assert(clang_type)(static_cast <bool> (clang_type) ? void (0) : __assert_fail
("clang_type", "/build/llvm-toolchain-snapshot-7~svn338205/tools/lldb/source/Plugins/SymbolFile/DWARF/DWARFASTParserClang.cpp"
, 2258, __extension__ __PRETTY_FUNCTION__))
;
2259 DWARFAttributes attributes;
2260 switch (tag) {
2261 case DW_TAG_structure_type:
2262 case DW_TAG_union_type:
2263 case DW_TAG_class_type: {
2264 ClangASTImporter::LayoutInfo layout_info;
2265
2266 {
2267 if (die.HasChildren()) {
2268 LanguageType class_language = eLanguageTypeUnknown;
2269 if (ClangASTContext::IsObjCObjectOrInterfaceType(clang_type)) {
2270 class_language = eLanguageTypeObjC;
2271 // For objective C we don't start the definition when the class is
2272 // created.
2273 ClangASTContext::StartTagDeclarationDefinition(clang_type);
2274 }
2275
2276 int tag_decl_kind = -1;
2277 AccessType default_accessibility = eAccessNone;
2278 if (tag == DW_TAG_structure_type) {
2279 tag_decl_kind = clang::TTK_Struct;
2280 default_accessibility = eAccessPublic;
2281 } else if (tag == DW_TAG_union_type) {
2282 tag_decl_kind = clang::TTK_Union;
2283 default_accessibility = eAccessPublic;
2284 } else if (tag == DW_TAG_class_type) {
2285 tag_decl_kind = clang::TTK_Class;
2286 default_accessibility = eAccessPrivate;
2287 }
2288
2289 SymbolContext sc(die.GetLLDBCompileUnit());
2290 std::vector<clang::CXXBaseSpecifier *> base_classes;
2291 std::vector<int> member_accessibilities;
2292 bool is_a_class = false;
2293 // Parse members and base classes first
2294 DWARFDIECollection member_function_dies;
2295
2296 DelayedPropertyList delayed_properties;
2297 ParseChildMembers(sc, die, clang_type, class_language, base_classes,
2298 member_accessibilities, member_function_dies,
2299 delayed_properties, default_accessibility, is_a_class,
2300 layout_info);
2301
2302 // Now parse any methods if there were any...
2303 size_t num_functions = member_function_dies.Size();
2304 if (num_functions > 0) {
2305 for (size_t i = 0; i < num_functions; ++i) {
2306 dwarf->ResolveType(member_function_dies.GetDIEAtIndex(i));
2307 }
2308 }
2309
2310 if (class_language == eLanguageTypeObjC) {
2311 ConstString class_name(clang_type.GetTypeName());
2312 if (class_name) {
2313 DIEArray method_die_offsets;
2314 dwarf->GetObjCMethodDIEOffsets(class_name, method_die_offsets);
2315
2316 if (!method_die_offsets.empty()) {
2317 DWARFDebugInfo *debug_info = dwarf->DebugInfo();
2318
2319 const size_t num_matches = method_die_offsets.size();
2320 for (size_t i = 0; i < num_matches; ++i) {
2321 const DIERef &die_ref = method_die_offsets[i];
2322 DWARFDIE method_die = debug_info->GetDIE(die_ref);
2323
2324 if (method_die)
2325 method_die.ResolveType();
2326 }
2327 }
2328
2329 for (DelayedPropertyList::iterator pi = delayed_properties.begin(),
2330 pe = delayed_properties.end();
2331 pi != pe; ++pi)
2332 pi->Finalize();
2333 }
2334 }
2335
2336 // If we have a DW_TAG_structure_type instead of a DW_TAG_class_type we
2337 // need to tell the clang type it is actually a class.
2338 if (class_language != eLanguageTypeObjC) {
2339 if (is_a_class && tag_decl_kind != clang::TTK_Class)
2340 m_ast.SetTagTypeKind(ClangUtil::GetQualType(clang_type),
2341 clang::TTK_Class);
2342 }
2343
2344 // Since DW_TAG_structure_type gets used for both classes and
2345 // structures, we may need to set any DW_TAG_member fields to have a
2346 // "private" access if none was specified. When we parsed the child
2347 // members we tracked that actual accessibility value for each
2348 // DW_TAG_member in the "member_accessibilities" array. If the value
2349 // for the member is zero, then it was set to the
2350 // "default_accessibility" which for structs was "public". Below we
2351 // correct this by setting any fields to "private" that weren't
2352 // correctly set.
2353 if (is_a_class && !member_accessibilities.empty()) {
2354 // This is a class and all members that didn't have their access
2355 // specified are private.
2356 m_ast.SetDefaultAccessForRecordFields(
2357 m_ast.GetAsRecordDecl(clang_type), eAccessPrivate,
2358 &member_accessibilities.front(), member_accessibilities.size());
2359 }
2360
2361 if (!base_classes.empty()) {
2362 // Make sure all base classes refer to complete types and not forward
2363 // declarations. If we don't do this, clang will crash with an
2364 // assertion in the call to clang_type.SetBaseClassesForClassType()
2365 for (auto &base_class : base_classes) {
2366 clang::TypeSourceInfo *type_source_info =
2367 base_class->getTypeSourceInfo();
2368 if (type_source_info) {
2369 CompilerType base_class_type(
2370 &m_ast, type_source_info->getType().getAsOpaquePtr());
2371 if (base_class_type.GetCompleteType() == false) {
2372 auto module = dwarf->GetObjectFile()->GetModule();
2373 module->ReportError(":: Class '%s' has a base class '%s' which "
2374 "does not have a complete definition.",
2375 die.GetName(),
2376 base_class_type.GetTypeName().GetCString());
2377 if (die.GetCU()->GetProducer() == eProducerClang)
2378 module->ReportError(":: Try compiling the source file with "
2379 "-fstandalone-debug.");
2380
2381 // We have no choice other than to pretend that the base class
2382 // is complete. If we don't do this, clang will crash when we
2383 // call setBases() inside of
2384 // "clang_type.SetBaseClassesForClassType()" below. Since we
2385 // provide layout assistance, all ivars in this class and other
2386 // classes will be fine, this is the best we can do short of
2387 // crashing.
2388 if (ClangASTContext::StartTagDeclarationDefinition(
2389 base_class_type)) {
2390 ClangASTContext::CompleteTagDeclarationDefinition(
2391 base_class_type);
2392 }
2393 }
2394 }
2395 }
2396 m_ast.SetBaseClassesForClassType(clang_type.GetOpaqueQualType(),
2397 &base_classes.front(),
2398 base_classes.size());
2399
2400 // Clang will copy each CXXBaseSpecifier in "base_classes" so we have
2401 // to free them all.
2402 ClangASTContext::DeleteBaseClassSpecifiers(&base_classes.front(),
2403 base_classes.size());
2404 }
2405 }
2406 }
2407
2408 addMethodOverrides(m_ast, clang_type);
2409 ClangASTContext::BuildIndirectFields(clang_type);
2410 ClangASTContext::CompleteTagDeclarationDefinition(clang_type);
2411
2412 if (!layout_info.field_offsets.empty() ||
2413 !layout_info.base_offsets.empty() ||
2414 !layout_info.vbase_offsets.empty()) {
2415 if (type)
2416 layout_info.bit_size = type->GetByteSize() * 8;
2417 if (layout_info.bit_size == 0)
2418 layout_info.bit_size =
2419 die.GetAttributeValueAsUnsigned(DW_AT_byte_size, 0) * 8;
2420
2421 clang::CXXRecordDecl *record_decl =
2422 m_ast.GetAsCXXRecordDecl(clang_type.GetOpaqueQualType());
2423 if (record_decl) {
2424 if (log) {
2425 ModuleSP module_sp = dwarf->GetObjectFile()->GetModule();
2426
2427 if (module_sp) {
2428 module_sp->LogMessage(
2429 log,
2430 "ClangASTContext::CompleteTypeFromDWARF (clang_type = %p) "
2431 "caching layout info for record_decl = %p, bit_size = %" PRIu64"l" "u"
2432 ", alignment = %" PRIu64"l" "u"
2433 ", field_offsets[%u], base_offsets[%u], vbase_offsets[%u])",
2434 static_cast<void *>(clang_type.GetOpaqueQualType()),
2435 static_cast<void *>(record_decl), layout_info.bit_size,
2436 layout_info.alignment,
2437 static_cast<uint32_t>(layout_info.field_offsets.size()),
2438 static_cast<uint32_t>(layout_info.base_offsets.size()),
2439 static_cast<uint32_t>(layout_info.vbase_offsets.size()));
2440
2441 uint32_t idx;
2442 {
2443 llvm::DenseMap<const clang::FieldDecl *, uint64_t>::const_iterator
2444 pos,
2445 end = layout_info.field_offsets.end();
2446 for (idx = 0, pos = layout_info.field_offsets.begin(); pos != end;
2447 ++pos, ++idx) {
2448 module_sp->LogMessage(
2449 log, "ClangASTContext::CompleteTypeFromDWARF (clang_type = "
2450 "%p) field[%u] = { bit_offset=%u, name='%s' }",
2451 static_cast<void *>(clang_type.GetOpaqueQualType()), idx,
2452 static_cast<uint32_t>(pos->second),
2453 pos->first->getNameAsString().c_str());
2454 }
2455 }
2456
2457 {
2458 llvm::DenseMap<const clang::CXXRecordDecl *,
2459 clang::CharUnits>::const_iterator base_pos,
2460 base_end = layout_info.base_offsets.end();
2461 for (idx = 0, base_pos = layout_info.base_offsets.begin();
2462 base_pos != base_end; ++base_pos, ++idx) {
2463 module_sp->LogMessage(
2464 log, "ClangASTContext::CompleteTypeFromDWARF (clang_type = "
2465 "%p) base[%u] = { byte_offset=%u, name='%s' }",
2466 clang_type.GetOpaqueQualType(), idx,
2467 (uint32_t)base_pos->second.getQuantity(),
2468 base_pos->first->getNameAsString().c_str());
2469 }
2470 }
2471 {
2472 llvm::DenseMap<const clang::CXXRecordDecl *,
2473 clang::CharUnits>::const_iterator vbase_pos,
2474 vbase_end = layout_info.vbase_offsets.end();
2475 for (idx = 0, vbase_pos = layout_info.vbase_offsets.begin();
2476 vbase_pos != vbase_end; ++vbase_pos, ++idx) {
2477 module_sp->LogMessage(
2478 log, "ClangASTContext::CompleteTypeFromDWARF (clang_type = "
2479 "%p) vbase[%u] = { byte_offset=%u, name='%s' }",
2480 static_cast<void *>(clang_type.GetOpaqueQualType()), idx,
2481 static_cast<uint32_t>(vbase_pos->second.getQuantity()),
2482 vbase_pos->first->getNameAsString().c_str());
2483 }
2484 }
2485 }
2486 }
2487 GetClangASTImporter().InsertRecordDecl(record_decl, layout_info);
2488 }
2489 }
2490 }
2491
2492 return (bool)clang_type;
2493
2494 case DW_TAG_enumeration_type:
2495 if (ClangASTContext::StartTagDeclarationDefinition(clang_type)) {
2496 if (die.HasChildren()) {
2497 SymbolContext sc(die.GetLLDBCompileUnit());
2498 bool is_signed = false;
2499 clang_type.IsIntegerType(is_signed);
2500 ParseChildEnumerators(sc, clang_type, is_signed, type->GetByteSize(),
2501 die);
2502 }
2503 ClangASTContext::CompleteTagDeclarationDefinition(clang_type);
2504 }
2505 return (bool)clang_type;
2506
2507 default:
2508 assert(false && "not a forward clang type decl!")(static_cast <bool> (false && "not a forward clang type decl!"
) ? void (0) : __assert_fail ("false && \"not a forward clang type decl!\""
, "/build/llvm-toolchain-snapshot-7~svn338205/tools/lldb/source/Plugins/SymbolFile/DWARF/DWARFASTParserClang.cpp"
, 2508, __extension__ __PRETTY_FUNCTION__))
;
2509 break;
2510 }
2511
2512 return false;
2513}
2514
2515std::vector<DWARFDIE> DWARFASTParserClang::GetDIEForDeclContext(
2516 lldb_private::CompilerDeclContext decl_context) {
2517 std::vector<DWARFDIE> result;
2518 for (auto it = m_decl_ctx_to_die.find(
2519 (clang::DeclContext *)decl_context.GetOpaqueDeclContext());
2520 it != m_decl_ctx_to_die.end(); it++)
2521 result.push_back(it->second);
2522 return result;
2523}
2524
2525CompilerDecl DWARFASTParserClang::GetDeclForUIDFromDWARF(const DWARFDIE &die) {
2526 clang::Decl *clang_decl = GetClangDeclForDIE(die);
2527 if (clang_decl != nullptr)
2528 return CompilerDecl(&m_ast, clang_decl);
2529 return CompilerDecl();
2530}
2531
2532CompilerDeclContext
2533DWARFASTParserClang::GetDeclContextForUIDFromDWARF(const DWARFDIE &die) {
2534 clang::DeclContext *clang_decl_ctx = GetClangDeclContextForDIE(die);
2535 if (clang_decl_ctx)
2536 return CompilerDeclContext(&m_ast, clang_decl_ctx);
2537 return CompilerDeclContext();
2538}
2539
2540CompilerDeclContext
2541DWARFASTParserClang::GetDeclContextContainingUIDFromDWARF(const DWARFDIE &die) {
2542 clang::DeclContext *clang_decl_ctx =
2543 GetClangDeclContextContainingDIE(die, nullptr);
2544 if (clang_decl_ctx)
2545 return CompilerDeclContext(&m_ast, clang_decl_ctx);
2546 return CompilerDeclContext();
2547}
2548
2549size_t DWARFASTParserClang::ParseChildEnumerators(
2550 const SymbolContext &sc, lldb_private::CompilerType &clang_type,
2551 bool is_signed, uint32_t enumerator_byte_size, const DWARFDIE &parent_die) {
2552 if (!parent_die)
2553 return 0;
2554
2555 size_t enumerators_added = 0;
2556
2557 for (DWARFDIE die = parent_die.GetFirstChild(); die.IsValid();
2558 die = die.GetSibling()) {
2559 const dw_tag_t tag = die.Tag();
2560 if (tag == DW_TAG_enumerator) {
2561 DWARFAttributes attributes;
2562 const size_t num_child_attributes = die.GetAttributes(attributes);
2563 if (num_child_attributes > 0) {
2564 const char *name = NULL__null;
2565 bool got_value = false;
2566 int64_t enum_value = 0;
2567 Declaration decl;
2568
2569 uint32_t i;
2570 for (i = 0; i < num_child_attributes; ++i) {
2571 const dw_attr_t attr = attributes.AttributeAtIndex(i);
2572 DWARFFormValue form_value;
2573 if (attributes.ExtractFormValueAtIndex(i, form_value)) {
2574 switch (attr) {
2575 case DW_AT_const_value:
2576 got_value = true;
2577 if (is_signed)
2578 enum_value = form_value.Signed();
2579 else
2580 enum_value = form_value.Unsigned();
2581 break;
2582
2583 case DW_AT_name:
2584 name = form_value.AsCString();
2585 break;
2586
2587 case DW_AT_description:
2588 default:
2589 case DW_AT_decl_file:
2590 decl.SetFile(sc.comp_unit->GetSupportFiles().GetFileSpecAtIndex(
2591 form_value.Unsigned()));
2592 break;
2593 case DW_AT_decl_line:
2594 decl.SetLine(form_value.Unsigned());
2595 break;
2596 case DW_AT_decl_column:
2597 decl.SetColumn(form_value.Unsigned());
2598 break;
2599 case DW_AT_sibling:
2600 break;
2601 }
2602 }
2603 }
2604
2605 if (name && name[0] && got_value) {
2606 m_ast.AddEnumerationValueToEnumerationType(
2607 clang_type.GetOpaqueQualType(),
2608 m_ast.GetEnumerationIntegerType(clang_type.GetOpaqueQualType()),
2609 decl, name, enum_value, enumerator_byte_size * 8);
2610 ++enumerators_added;
2611 }
2612 }
2613 }
2614 }
2615 return enumerators_added;
2616}
2617
2618#if defined(LLDB_CONFIGURATION_DEBUG) || defined(LLDB_CONFIGURATION_RELEASE1)
2619
2620class DIEStack {
2621public:
2622 void Push(const DWARFDIE &die) { m_dies.push_back(die); }
2623
2624 void LogDIEs(Log *log) {
2625 StreamString log_strm;
2626 const size_t n = m_dies.size();
2627 log_strm.Printf("DIEStack[%" PRIu64"l" "u" "]:\n", (uint64_t)n);
2628 for (size_t i = 0; i < n; i++) {
2629 std::string qualified_name;
2630 const DWARFDIE &die = m_dies[i];
2631 die.GetQualifiedName(qualified_name);
2632 log_strm.Printf("[%" PRIu64"l" "u" "] 0x%8.8x: %s name='%s'\n", (uint64_t)i,
2633 die.GetOffset(), die.GetTagAsCString(),
2634 qualified_name.c_str());
2635 }
2636 log->PutCString(log_strm.GetData());
2637 }
2638 void Pop() { m_dies.pop_back(); }
2639
2640 class ScopedPopper {
2641 public:
2642 ScopedPopper(DIEStack &die_stack)
2643 : m_die_stack(die_stack), m_valid(false) {}
2644
2645 void Push(const DWARFDIE &die) {
2646 m_valid = true;
2647 m_die_stack.Push(die);
2648 }
2649
2650 ~ScopedPopper() {
2651 if (m_valid)
2652 m_die_stack.Pop();
2653 }
2654
2655 protected:
2656 DIEStack &m_die_stack;
2657 bool m_valid;
2658 };
2659
2660protected:
2661 typedef std::vector<DWARFDIE> Stack;
2662 Stack m_dies;
2663};
2664#endif
2665
2666Function *DWARFASTParserClang::ParseFunctionFromDWARF(const SymbolContext &sc,
2667 const DWARFDIE &die) {
2668 DWARFRangeList func_ranges;
2669 const char *name = NULL__null;
2670 const char *mangled = NULL__null;
2671 int decl_file = 0;
2672 int decl_line = 0;
2673 int decl_column = 0;
2674 int call_file = 0;
2675 int call_line = 0;
2676 int call_column = 0;
2677 DWARFExpression frame_base(die.GetCU());
2678
2679 const dw_tag_t tag = die.Tag();
2680
2681 if (tag != DW_TAG_subprogram)
2682 return NULL__null;
2683
2684 if (die.GetDIENamesAndRanges(name, mangled, func_ranges, decl_file, decl_line,
2685 decl_column, call_file, call_line, call_column,
2686 &frame_base)) {
2687
2688 // Union of all ranges in the function DIE (if the function is
2689 // discontiguous)
2690 AddressRange func_range;
2691 lldb::addr_t lowest_func_addr = func_ranges.GetMinRangeBase(0);
2692 lldb::addr_t highest_func_addr = func_ranges.GetMaxRangeEnd(0);
2693 if (lowest_func_addr != LLDB_INVALID_ADDRESS(18446744073709551615UL) &&
2694 lowest_func_addr <= highest_func_addr) {
2695 ModuleSP module_sp(die.GetModule());
2696 func_range.GetBaseAddress().ResolveAddressUsingFileSections(
2697 lowest_func_addr, module_sp->GetSectionList());
2698 if (func_range.GetBaseAddress().IsValid())
2699 func_range.SetByteSize(highest_func_addr - lowest_func_addr);
2700 }
2701
2702 if (func_range.GetBaseAddress().IsValid()) {
2703 Mangled func_name;
2704 if (mangled)
2705 func_name.SetValue(ConstString(mangled), true);
2706 else if ((die.GetParent().Tag() == DW_TAG_compile_unit ||
2707 die.GetParent().Tag() == DW_TAG_partial_unit) &&
2708 Language::LanguageIsCPlusPlus(die.GetLanguage()) && name &&
2709 strcmp(name, "main") != 0) {
2710 // If the mangled name is not present in the DWARF, generate the
2711 // demangled name using the decl context. We skip if the function is
2712 // "main" as its name is never mangled.
2713 bool is_static = false;
2714 bool is_variadic = false;
2715 bool has_template_params = false;
2716 unsigned type_quals = 0;
2717 std::vector<CompilerType> param_types;
2718 std::vector<clang::ParmVarDecl *> param_decls;
2719 DWARFDeclContext decl_ctx;
2720 StreamString sstr;
2721
2722 die.GetDWARFDeclContext(decl_ctx);
2723 sstr << decl_ctx.GetQualifiedName();
2724
2725 clang::DeclContext *containing_decl_ctx =
2726 GetClangDeclContextContainingDIE(die, nullptr);
2727 ParseChildParameters(sc, containing_decl_ctx, die, true, is_static,
2728 is_variadic, has_template_params, param_types,
2729 param_decls, type_quals);
2730 sstr << "(";
2731 for (size_t i = 0; i < param_types.size(); i++) {
2732 if (i > 0)
2733 sstr << ", ";
2734 sstr << param_types[i].GetTypeName();
2735 }
2736 if (is_variadic)
2737 sstr << ", ...";
2738 sstr << ")";
2739 if (type_quals & clang::Qualifiers::Const)
2740 sstr << " const";
2741
2742 func_name.SetValue(ConstString(sstr.GetString()), false);
2743 } else
2744 func_name.SetValue(ConstString(name), false);
2745
2746 FunctionSP func_sp;
2747 std::unique_ptr<Declaration> decl_ap;
2748 if (decl_file != 0 || decl_line != 0 || decl_column != 0)
2749 decl_ap.reset(new Declaration(
2750 sc.comp_unit->GetSupportFiles().GetFileSpecAtIndex(decl_file),
2751 decl_line, decl_column));
2752
2753 SymbolFileDWARF *dwarf = die.GetDWARF();
2754 // Supply the type _only_ if it has already been parsed
2755 Type *func_type = dwarf->GetDIEToType().lookup(die.GetDIE());
2756
2757 assert(func_type == NULL || func_type != DIE_IS_BEING_PARSED)(static_cast <bool> (func_type == __null || func_type !=
((lldb_private::Type *)1)) ? void (0) : __assert_fail ("func_type == NULL || func_type != DIE_IS_BEING_PARSED"
, "/build/llvm-toolchain-snapshot-7~svn338205/tools/lldb/source/Plugins/SymbolFile/DWARF/DWARFASTParserClang.cpp"
, 2757, __extension__ __PRETTY_FUNCTION__))
;
2758
2759 if (dwarf->FixupAddress(func_range.GetBaseAddress())) {
2760 const user_id_t func_user_id = die.GetID();
2761 func_sp.reset(new Function(sc.comp_unit,
2762 func_user_id, // UserID is the DIE offset
2763 func_user_id, func_name, func_type,
2764 func_range)); // first address range
2765
2766 if (func_sp.get() != NULL__null) {
2767 if (frame_base.IsValid())
2768 func_sp->GetFrameBaseExpression() = frame_base;
2769 sc.comp_unit->AddFunction(func_sp);
2770 return func_sp.get();
2771 }
2772 }
2773 }
2774 }
2775 return NULL__null;
2776}
2777
2778bool DWARFASTParserClang::ParseChildMembers(
2779 const SymbolContext &sc, const DWARFDIE &parent_die,
2780 CompilerType &class_clang_type, const LanguageType class_language,
2781 std::vector<clang::CXXBaseSpecifier *> &base_classes,
2782 std::vector<int> &member_accessibilities,
2783 DWARFDIECollection &member_function_dies,
2784 DelayedPropertyList &delayed_properties, AccessType &default_accessibility,
2785 bool &is_a_class, ClangASTImporter::LayoutInfo &layout_info) {
2786 if (!parent_die)
2787 return 0;
2788
2789 // Get the parent byte size so we can verify any members will fit
2790 const uint64_t parent_byte_size =
2791 parent_die.GetAttributeValueAsUnsigned(DW_AT_byte_size, UINT64_MAX(18446744073709551615UL));
2792 const uint64_t parent_bit_size =
2793 parent_byte_size == UINT64_MAX(18446744073709551615UL) ? UINT64_MAX(18446744073709551615UL) : parent_byte_size * 8;
2794
2795 uint32_t member_idx = 0;
2796 BitfieldInfo last_field_info;
2797
2798 ModuleSP module_sp = parent_die.GetDWARF()->GetObjectFile()->GetModule();
2799 ClangASTContext *ast =
2800 llvm::dyn_cast_or_null<ClangASTContext>(class_clang_type.GetTypeSystem());
2801 if (ast == nullptr)
2802 return 0;
2803
2804 for (DWARFDIE die = parent_die.GetFirstChild(); die.IsValid();
2805 die = die.GetSibling()) {
2806 dw_tag_t tag = die.Tag();
2807
2808 switch (tag) {
2809 case DW_TAG_member:
2810 case DW_TAG_APPLE_property: {
2811 DWARFAttributes attributes;
2812 const size_t num_attributes = die.GetAttributes(attributes);
2813 if (num_attributes > 0) {
2814 Declaration decl;
2815 // DWARFExpression location;
2816 const char *name = NULL__null;
2817 const char *prop_name = NULL__null;
2818 const char *prop_getter_name = NULL__null;
2819 const char *prop_setter_name = NULL__null;
2820 uint32_t prop_attributes = 0;
2821
2822 bool is_artificial = false;
2823 DWARFFormValue encoding_form;
2824 AccessType accessibility = eAccessNone;
2825 uint32_t member_byte_offset =
2826 (parent_die.Tag() == DW_TAG_union_type) ? 0 : UINT32_MAX(4294967295U);
2827 size_t byte_size = 0;
2828 int64_t bit_offset = 0;
2829 uint64_t data_bit_offset = UINT64_MAX(18446744073709551615UL);
2830 size_t bit_size = 0;
2831 bool is_external =
2832 false; // On DW_TAG_members, this means the member is static
2833 uint32_t i;
2834 for (i = 0; i < num_attributes && !is_artificial; ++i) {
2835 const dw_attr_t attr = attributes.AttributeAtIndex(i);
2836 DWARFFormValue form_value;
2837 if (attributes.ExtractFormValueAtIndex(i, form_value)) {
2838 switch (attr) {
2839 case DW_AT_decl_file:
2840 decl.SetFile(sc.comp_unit->GetSupportFiles().GetFileSpecAtIndex(
2841 form_value.Unsigned()));
2842 break;
2843 case DW_AT_decl_line:
2844 decl.SetLine(form_value.Unsigned());
2845 break;
2846 case DW_AT_decl_column:
2847 decl.SetColumn(form_value.Unsigned());
2848 break;
2849 case DW_AT_name:
2850 name = form_value.AsCString();
2851 break;
2852 case DW_AT_type:
2853 encoding_form = form_value;
2854 break;
2855 case DW_AT_bit_offset:
2856 bit_offset = form_value.Signed();
2857 break;
2858 case DW_AT_bit_size:
2859 bit_size = form_value.Unsigned();
2860 break;
2861 case DW_AT_byte_size:
2862 byte_size = form_value.Unsigned();
2863 break;
2864 case DW_AT_data_bit_offset:
2865 data_bit_offset = form_value.Unsigned();
2866 break;
2867 case DW_AT_data_member_location:
2868 if (form_value.BlockData()) {
2869 Value initialValue(0);
2870 Value memberOffset(0);
2871 const DWARFDataExtractor &debug_info_data = die.GetData();
2872 uint32_t block_length = form_value.Unsigned();
2873 uint32_t block_offset =
2874 form_value.BlockData() - debug_info_data.GetDataStart();
2875 if (DWARFExpression::Evaluate(
2876 nullptr, // ExecutionContext *
2877 nullptr, // RegisterContext *
2878 module_sp, debug_info_data, die.GetCU(), block_offset,
2879 block_length, eRegisterKindDWARF, &initialValue,
2880 nullptr, memberOffset, nullptr)) {
2881 member_byte_offset = memberOffset.ResolveValue(NULL__null).UInt();
2882 }
2883 } else {
2884 // With DWARF 3 and later, if the value is an integer constant,
2885 // this form value is the offset in bytes from the beginning of
2886 // the containing entity.
2887 member_byte_offset = form_value.Unsigned();
2888 }
2889 break;
2890
2891 case DW_AT_accessibility:
2892 accessibility = DW_ACCESS_to_AccessType(form_value.Unsigned());
2893 break;
2894 case DW_AT_artificial:
2895 is_artificial = form_value.Boolean();
2896 break;
2897 case DW_AT_APPLE_property_name:
2898 prop_name = form_value.AsCString();
2899 break;
2900 case DW_AT_APPLE_property_getter:
2901 prop_getter_name = form_value.AsCString();
2902 break;
2903 case DW_AT_APPLE_property_setter:
2904 prop_setter_name = form_value.AsCString();
2905 break;
2906 case DW_AT_APPLE_property_attribute:
2907 prop_attributes = form_value.Unsigned();
2908 break;
2909 case DW_AT_external:
2910 is_external = form_value.Boolean();
2911 break;
2912
2913 default:
2914 case DW_AT_declaration:
2915 case DW_AT_description:
2916 case DW_AT_mutable:
2917 case DW_AT_visibility:
2918 case DW_AT_sibling:
2919 break;
2920 }
2921 }
2922 }
2923
2924 if (prop_name) {
2925 ConstString fixed_getter;
2926 ConstString fixed_setter;
2927
2928 // Check if the property getter/setter were provided as full names.
2929 // We want basenames, so we extract them.
2930
2931 if (prop_getter_name && prop_getter_name[0] == '-') {
2932 ObjCLanguage::MethodName prop_getter_method(prop_getter_name, true);
2933 prop_getter_name = prop_getter_method.GetSelector().GetCString();
2934 }
2935
2936 if (prop_setter_name && prop_setter_name[0] == '-') {
2937 ObjCLanguage::MethodName prop_setter_method(prop_setter_name, true);
2938 prop_setter_name = prop_setter_method.GetSelector().GetCString();
2939 }
2940
2941 // If the names haven't been provided, they need to be filled in.
2942
2943 if (!prop_getter_name) {
2944 prop_getter_name = prop_name;
2945 }
2946 if (!prop_setter_name && prop_name[0] &&
2947 !(prop_attributes & DW_APPLE_PROPERTY_readonly)) {
2948 StreamString ss;
2949
2950 ss.Printf("set%c%s:", toupper(prop_name[0]), &prop_name[1]);
2951
2952 fixed_setter.SetString(ss.GetString());
2953 prop_setter_name = fixed_setter.GetCString();
2954 }
2955 }
2956
2957 // Clang has a DWARF generation bug where sometimes it represents
2958 // fields that are references with bad byte size and bit size/offset
2959 // information such as:
2960 //
2961 // DW_AT_byte_size( 0x00 )
2962 // DW_AT_bit_size( 0x40 )
2963 // DW_AT_bit_offset( 0xffffffffffffffc0 )
2964 //
2965 // So check the bit offset to make sure it is sane, and if the values
2966 // are not sane, remove them. If we don't do this then we will end up
2967 // with a crash if we try to use this type in an expression when clang
2968 // becomes unhappy with its recycled debug info.
2969
2970 if (byte_size == 0 && bit_offset < 0) {
2971 bit_size = 0;
2972 bit_offset = 0;
2973 }
2974
2975 // FIXME: Make Clang ignore Objective-C accessibility for expressions
2976 if (class_language == eLanguageTypeObjC ||
2977 class_language == eLanguageTypeObjC_plus_plus)
2978 accessibility = eAccessNone;
2979
2980 if (member_idx == 0 && !is_artificial && name &&
2981 (strstr(name, "_vptr$") == name)) {
2982 // Not all compilers will mark the vtable pointer member as
2983 // artificial (llvm-gcc). We can't have the virtual members in our
2984 // classes otherwise it throws off all child offsets since we end up
2985 // having and extra pointer sized member in our class layouts.
2986 is_artificial = true;
2987 }
2988
2989 // Handle static members
2990 if (is_external && member_byte_offset == UINT32_MAX(4294967295U)) {
2991 Type *var_type = die.ResolveTypeUID(DIERef(encoding_form));
2992
2993 if (var_type) {
2994 if (accessibility == eAccessNone)
2995 accessibility = eAccessPublic;
2996 ClangASTContext::AddVariableToRecordType(
2997 class_clang_type, name, var_type->GetLayoutCompilerType(),
2998 accessibility);
2999 }
3000 break;
3001 }
3002
3003 if (is_artificial == false) {
3004 Type *member_type = die.ResolveTypeUID(DIERef(encoding_form));
3005
3006 clang::FieldDecl *field_decl = NULL__null;
3007 if (tag == DW_TAG_member) {
3008 if (member_type) {
3009 if (accessibility == eAccessNone)
3010 accessibility = default_accessibility;
3011 member_accessibilities.push_back(accessibility);
3012
3013 uint64_t field_bit_offset =
3014 (member_byte_offset == UINT32_MAX(4294967295U) ? 0
3015 : (member_byte_offset * 8));
3016 if (bit_size > 0) {
3017
3018 BitfieldInfo this_field_info;
3019 this_field_info.bit_offset = field_bit_offset;
3020 this_field_info.bit_size = bit_size;
3021
3022 /////////////////////////////////////////////////////////////
3023 // How to locate a field given the DWARF debug information
3024 //
3025 // AT_byte_size indicates the size of the word in which the bit
3026 // offset must be interpreted.
3027 //
3028 // AT_data_member_location indicates the byte offset of the
3029 // word from the base address of the structure.
3030 //
3031 // AT_bit_offset indicates how many bits into the word
3032 // (according to the host endianness) the low-order bit of the
3033 // field starts. AT_bit_offset can be negative.
3034 //
3035 // AT_bit_size indicates the size of the field in bits.
3036 /////////////////////////////////////////////////////////////
3037
3038 if (data_bit_offset != UINT64_MAX(18446744073709551615UL)) {
3039 this_field_info.bit_offset = data_bit_offset;
3040 } else {
3041 if (byte_size == 0)
3042 byte_size = member_type->GetByteSize();
3043
3044 ObjectFile *objfile = die.GetDWARF()->GetObjectFile();
3045 if (objfile->GetByteOrder() == eByteOrderLittle) {
3046 this_field_info.bit_offset += byte_size * 8;
3047 this_field_info.bit_offset -= (bit_offset + bit_size);
3048 } else {
3049 this_field_info.bit_offset += bit_offset;
3050 }
3051 }
3052
3053 if ((this_field_info.bit_offset >= parent_bit_size) ||
3054 !last_field_info.NextBitfieldOffsetIsValid(
3055 this_field_info.bit_offset)) {
3056 ObjectFile *objfile = die.GetDWARF()->GetObjectFile();
3057 objfile->GetModule()->ReportWarning(
3058 "0x%8.8" PRIx64"l" "x" ": %s bitfield named \"%s\" has invalid "
3059 "bit offset (0x%8.8" PRIx64"l" "x"
3060 ") member will be ignored. Please file a bug against the "
3061 "compiler and include the preprocessed output for %s\n",
3062 die.GetID(), DW_TAG_value_to_name(tag), name,
3063 this_field_info.bit_offset,
3064 sc.comp_unit ? sc.comp_unit->GetPath().c_str()
3065 : "the source file");
3066 this_field_info.Clear();
3067 continue;
3068 }
3069
3070 // Update the field bit offset we will report for layout
3071 field_bit_offset = this_field_info.bit_offset;
3072
3073 // If the member to be emitted did not start on a character
3074 // boundary and there is empty space between the last field and
3075 // this one, then we need to emit an anonymous member filling
3076 // up the space up to its start. There are three cases here:
3077 //
3078 // 1 If the previous member ended on a character boundary, then
3079 // we can emit an
3080 // anonymous member starting at the most recent character
3081 // boundary.
3082 //
3083 // 2 If the previous member did not end on a character boundary
3084 // and the distance
3085 // from the end of the previous member to the current member
3086 // is less than a
3087 // word width, then we can emit an anonymous member starting
3088 // right after the
3089 // previous member and right before this member.
3090 //
3091 // 3 If the previous member did not end on a character boundary
3092 // and the distance
3093 // from the end of the previous member to the current member
3094 // is greater than
3095 // or equal a word width, then we act as in Case 1.
3096
3097 const uint64_t character_width = 8;
3098 const uint64_t word_width = 32;
3099
3100 // Objective-C has invalid DW_AT_bit_offset values in older
3101 // versions of clang, so we have to be careful and only insert
3102 // unnamed bitfields if we have a new enough clang.
3103 bool detect_unnamed_bitfields = true;
3104
3105 if (class_language == eLanguageTypeObjC ||
3106 class_language == eLanguageTypeObjC_plus_plus)
3107 detect_unnamed_bitfields =
3108 die.GetCU()->Supports_unnamed_objc_bitfields();
3109
3110 if (detect_unnamed_bitfields) {
3111 BitfieldInfo anon_field_info;
3112
3113 if ((this_field_info.bit_offset % character_width) !=
3114 0) // not char aligned
3115 {
3116 uint64_t last_field_end = 0;
3117
3118 if (last_field_info.IsValid())
3119 last_field_end =
3120 last_field_info.bit_offset + last_field_info.bit_size;
3121
3122 if (this_field_info.bit_offset != last_field_end) {
3123 if (((last_field_end % character_width) == 0) || // case 1
3124 (this_field_info.bit_offset - last_field_end >=
3125 word_width)) // case 3
3126 {
3127 anon_field_info.bit_size =
3128 this_field_info.bit_offset % character_width;
3129 anon_field_info.bit_offset =
3130 this_field_info.bit_offset -
3131 anon_field_info.bit_size;
3132 } else // case 2
3133 {
3134 anon_field_info.bit_size =
3135 this_field_info.bit_offset - last_field_end;
3136 anon_field_info.bit_offset = last_field_end;
3137 }
3138 }
3139 }
3140
3141 if (anon_field_info.IsValid()) {
3142 clang::FieldDecl *unnamed_bitfield_decl =
3143 ClangASTContext::AddFieldToRecordType(
3144 class_clang_type, NULL__null,
3145 m_ast.GetBuiltinTypeForEncodingAndBitSize(
3146 eEncodingSint, word_width),
3147 accessibility, anon_field_info.bit_size);
3148
3149 layout_info.field_offsets.insert(std::make_pair(
3150 unnamed_bitfield_decl, anon_field_info.bit_offset));
3151 }
3152 }
3153 last_field_info = this_field_info;
3154 } else {
3155 last_field_info.Clear();
3156 }
3157
3158 CompilerType member_clang_type =
3159 member_type->GetLayoutCompilerType();
3160 if (!member_clang_type.IsCompleteType())
3161 member_clang_type.GetCompleteType();
3162
3163 {
3164 // Older versions of clang emit array[0] and array[1] in the
3165 // same way (<rdar://problem/12566646>). If the current field
3166 // is at the end of the structure, then there is definitely no
3167 // room for extra elements and we override the type to
3168 // array[0].
3169
3170 CompilerType member_array_element_type;
3171 uint64_t member_array_size;
3172 bool member_array_is_incomplete;
3173
3174 if (member_clang_type.IsArrayType(
3175 &member_array_element_type, &member_array_size,
3176 &member_array_is_incomplete) &&
3177 !member_array_is_incomplete) {
3178 uint64_t parent_byte_size =
3179 parent_die.GetAttributeValueAsUnsigned(DW_AT_byte_size,
3180 UINT64_MAX(18446744073709551615UL));
3181
3182 if (member_byte_offset >= parent_byte_size) {
3183 if (member_array_size != 1 &&
3184 (member_array_size != 0 ||
3185 member_byte_offset > parent_byte_size)) {
3186 module_sp->ReportError(
3187 "0x%8.8" PRIx64"l" "x"
3188 ": DW_TAG_member '%s' refers to type 0x%8.8" PRIx64"l" "x"
3189 " which extends beyond the bounds of 0x%8.8" PRIx64"l" "x",
3190 die.GetID(), name, encoding_form.Reference(),
3191 parent_die.GetID());
3192 }
3193
3194 member_clang_type = m_ast.CreateArrayType(
3195 member_array_element_type, 0, false);
3196 }
3197 }
3198 }
3199
3200 if (ClangASTContext::IsCXXClassType(member_clang_type) &&
3201 member_clang_type.GetCompleteType() == false) {
3202 if (die.GetCU()->GetProducer() == eProducerClang)
3203 module_sp->ReportError(
3204 "DWARF DIE at 0x%8.8x (class %s) has a member variable "
3205 "0x%8.8x (%s) whose type is a forward declaration, not a "
3206 "complete definition.\nTry compiling the source file "
3207 "with -fstandalone-debug",
3208 parent_die.GetOffset(), parent_die.GetName(),
3209 die.GetOffset(), name);
3210 else
3211 module_sp->ReportError(
3212 "DWARF DIE at 0x%8.8x (class %s) has a member variable "
3213 "0x%8.8x (%s) whose type is a forward declaration, not a "
3214 "complete definition.\nPlease file a bug against the "
3215 "compiler and include the preprocessed output for %s",
3216 parent_die.GetOffset(), parent_die.GetName(),
3217 die.GetOffset(), name,
3218 sc.comp_unit ? sc.comp_unit->GetPath().c_str()
3219 : "the source file");
3220 // We have no choice other than to pretend that the member
3221 // class is complete. If we don't do this, clang will crash
3222 // when trying to layout the class. Since we provide layout
3223 // assistance, all ivars in this class and other classes will
3224 // be fine, this is the best we can do short of crashing.
3225 if (ClangASTContext::StartTagDeclarationDefinition(
3226 member_clang_type)) {
3227 ClangASTContext::CompleteTagDeclarationDefinition(
3228 member_clang_type);
3229 } else {
3230 module_sp->ReportError(
3231 "DWARF DIE at 0x%8.8x (class %s) has a member variable "
3232 "0x%8.8x (%s) whose type claims to be a C++ class but we "
3233 "were not able to start its definition.\nPlease file a "
3234 "bug and attach the file at the start of this error "
3235 "message",
3236 parent_die.GetOffset(), parent_die.GetName(),
3237 die.GetOffset(), name);
3238 }
3239 }
3240
3241 field_decl = ClangASTContext::AddFieldToRecordType(
3242 class_clang_type, name, member_clang_type, accessibility,
3243 bit_size);
3244
3245 m_ast.SetMetadataAsUserID(field_decl, die.GetID());
3246
3247 layout_info.field_offsets.insert(
3248 std::make_pair(field_decl, field_bit_offset));
3249 } else {
3250 if (name)
3251 module_sp->ReportError(
3252 "0x%8.8" PRIx64"l" "x"
3253 ": DW_TAG_member '%s' refers to type 0x%8.8" PRIx64"l" "x"
3254 " which was unable to be parsed",
3255 die.GetID(), name, encoding_form.Reference());
3256 else
3257 module_sp->ReportError(
3258 "0x%8.8" PRIx64"l" "x"
3259 ": DW_TAG_member refers to type 0x%8.8" PRIx64"l" "x"
3260 " which was unable to be parsed",
3261 die.GetID(), encoding_form.Reference());
3262 }
3263 }
3264
3265 if (prop_name != NULL__null && member_type) {
3266 clang::ObjCIvarDecl *ivar_decl = NULL__null;
3267
3268 if (field_decl) {
3269 ivar_decl = clang::dyn_cast<clang::ObjCIvarDecl>(field_decl);
3270 assert(ivar_decl != NULL)(static_cast <bool> (ivar_decl != __null) ? void (0) : __assert_fail
("ivar_decl != NULL", "/build/llvm-toolchain-snapshot-7~svn338205/tools/lldb/source/Plugins/SymbolFile/DWARF/DWARFASTParserClang.cpp"
, 3270, __extension__ __PRETTY_FUNCTION__))
;
3271 }
3272
3273 ClangASTMetadata metadata;
3274 metadata.SetUserID(die.GetID());
3275 delayed_properties.push_back(DelayedAddObjCClassProperty(
3276 class_clang_type, prop_name,
3277 member_type->GetLayoutCompilerType(), ivar_decl,
3278 prop_setter_name, prop_getter_name, prop_attributes,
3279 &metadata));
3280
3281 if (ivar_decl)
3282 m_ast.SetMetadataAsUserID(ivar_decl, die.GetID());
3283 }
3284 }
3285 }
3286 ++member_idx;
3287 } break;
3288
3289 case DW_TAG_subprogram:
3290 // Let the type parsing code handle this one for us.
3291 member_function_dies.Append(die);
3292 break;
3293
3294 case DW_TAG_inheritance: {
3295 is_a_class = true;
3296 if (default_accessibility == eAccessNone)
3297 default_accessibility = eAccessPrivate;
3298 // TODO: implement DW_TAG_inheritance type parsing
3299 DWARFAttributes attributes;
3300 const size_t num_attributes = die.GetAttributes(attributes);
3301 if (num_attributes > 0) {
3302 Declaration decl;
3303 DWARFExpression location(die.GetCU());
3304 DWARFFormValue encoding_form;
3305 AccessType accessibility = default_accessibility;
3306 bool is_virtual = false;
3307 bool is_base_of_class = true;
3308 off_t member_byte_offset = 0;
3309 uint32_t i;
3310 for (i = 0; i < num_attributes; ++i) {
3311 const dw_attr_t attr = attributes.AttributeAtIndex(i);
3312 DWARFFormValue form_value;
3313 if (attributes.ExtractFormValueAtIndex(i, form_value)) {
3314 switch (attr) {
3315 case DW_AT_decl_file:
3316 decl.SetFile(sc.comp_unit->GetSupportFiles().GetFileSpecAtIndex(
3317 form_value.Unsigned()));
3318 break;
3319 case DW_AT_decl_line:
3320 decl.SetLine(form_value.Unsigned());
3321 break;
3322 case DW_AT_decl_column:
3323 decl.SetColumn(form_value.Unsigned());
3324 break;
3325 case DW_AT_type:
3326 encoding_form = form_value;
3327 break;
3328 case DW_AT_data_member_location:
3329 if (form_value.BlockData()) {
3330 Value initialValue(0);
3331 Value memberOffset(0);
3332 const DWARFDataExtractor &debug_info_data = die.GetData();
3333 uint32_t block_length = form_value.Unsigned();
3334 uint32_t block_offset =
3335 form_value.BlockData() - debug_info_data.GetDataStart();
3336 if (DWARFExpression::Evaluate(nullptr, nullptr, module_sp,
3337 debug_info_data, die.GetCU(),
3338 block_offset, block_length,
3339 eRegisterKindDWARF, &initialValue,
3340 nullptr, memberOffset, nullptr)) {
3341 member_byte_offset = memberOffset.ResolveValue(NULL__null).UInt();
3342 }
3343 } else {
3344 // With DWARF 3 and later, if the value is an integer constant,
3345 // this form value is the offset in bytes from the beginning of
3346 // the containing entity.
3347 member_byte_offset = form_value.Unsigned();
3348 }
3349 break;
3350
3351 case DW_AT_accessibility:
3352 accessibility = DW_ACCESS_to_AccessType(form_value.Unsigned());
3353 break;
3354
3355 case DW_AT_virtuality:
3356 is_virtual = form_value.Boolean();
3357 break;
3358
3359 case DW_AT_sibling:
3360 break;
3361
3362 default:
3363 break;
3364 }
3365 }
3366 }
3367
3368 Type *base_class_type = die.ResolveTypeUID(DIERef(encoding_form));
3369 if (base_class_type == NULL__null) {
3370 module_sp->ReportError("0x%8.8x: DW_TAG_inheritance failed to "
3371 "resolve the base class at 0x%8.8" PRIx64"l" "x"
3372 " from enclosing type 0x%8.8x. \nPlease file "
3373 "a bug and attach the file at the start of "
3374 "this error message",
3375 die.GetOffset(), encoding_form.Reference(),
3376 parent_die.GetOffset());
3377 break;
3378 }
3379
3380 CompilerType base_class_clang_type =
3381 base_class_type->GetFullCompilerType();
3382 assert(base_class_clang_type)(static_cast <bool> (base_class_clang_type) ? void (0) :
__assert_fail ("base_class_clang_type", "/build/llvm-toolchain-snapshot-7~svn338205/tools/lldb/source/Plugins/SymbolFile/DWARF/DWARFASTParserClang.cpp"
, 3382, __extension__ __PRETTY_FUNCTION__))
;
3383 if (class_language == eLanguageTypeObjC) {
3384 ast->SetObjCSuperClass(class_clang_type, base_class_clang_type);
3385 } else {
3386 base_classes.push_back(ast->CreateBaseClassSpecifier(
3387 base_class_clang_type.GetOpaqueQualType(), accessibility,
3388 is_virtual, is_base_of_class));
3389
3390 if (is_virtual) {
3391 // Do not specify any offset for virtual inheritance. The DWARF
3392 // produced by clang doesn't give us a constant offset, but gives
3393 // us a DWARF expressions that requires an actual object in memory.
3394 // the DW_AT_data_member_location for a virtual base class looks
3395 // like:
3396 // DW_AT_data_member_location( DW_OP_dup, DW_OP_deref,
3397 // DW_OP_constu(0x00000018), DW_OP_minus, DW_OP_deref,
3398 // DW_OP_plus )
3399 // Given this, there is really no valid response we can give to
3400 // clang for virtual base class offsets, and this should eventually
3401 // be removed from LayoutRecordType() in the external
3402 // AST source in clang.
3403 } else {
3404 layout_info.base_offsets.insert(std::make_pair(
3405 ast->GetAsCXXRecordDecl(
3406 base_class_clang_type.GetOpaqueQualType()),
3407 clang::CharUnits::fromQuantity(member_byte_offset)));
3408 }
3409 }
3410 }
3411 } break;
3412
3413 default:
3414 break;
3415 }
3416 }
3417
3418 return true;
3419}
3420
3421size_t DWARFASTParserClang::ParseChildParameters(
3422 const SymbolContext &sc, clang::DeclContext *containing_decl_ctx,
3423 const DWARFDIE &parent_die, bool skip_artificial, bool &is_static,
3424 bool &is_variadic, bool &has_template_params,
3425 std::vector<CompilerType> &function_param_types,
3426 std::vector<clang::ParmVarDecl *> &function_param_decls,
3427 unsigned &type_quals) {
3428 if (!parent_die)
3429 return 0;
3430
3431 size_t arg_idx = 0;
3432 for (DWARFDIE die = parent_die.GetFirstChild(); die.IsValid();
3433 die = die.GetSibling()) {
3434 const dw_tag_t tag = die.Tag();
3435 switch (tag) {
3436 case DW_TAG_formal_parameter: {
3437 DWARFAttributes attributes;
3438 const size_t num_attributes = die.GetAttributes(attributes);
3439 if (num_attributes > 0) {
3440 const char *name = NULL__null;
3441 Declaration decl;
3442 DWARFFormValue param_type_die_form;
3443 bool is_artificial = false;
3444 // one of None, Auto, Register, Extern, Static, PrivateExtern
3445
3446 clang::StorageClass storage = clang::SC_None;
3447 uint32_t i;
3448 for (i = 0; i < num_attributes; ++i) {
3449 const dw_attr_t attr = attributes.AttributeAtIndex(i);
3450 DWARFFormValue form_value;
3451 if (attributes.ExtractFormValueAtIndex(i, form_value)) {
3452 switch (attr) {
3453 case DW_AT_decl_file:
3454 decl.SetFile(sc.comp_unit->GetSupportFiles().GetFileSpecAtIndex(
3455 form_value.Unsigned()));
3456 break;
3457 case DW_AT_decl_line:
3458 decl.SetLine(form_value.Unsigned());
3459 break;
3460 case DW_AT_decl_column:
3461 decl.SetColumn(form_value.Unsigned());
3462 break;
3463 case DW_AT_name:
3464 name = form_value.AsCString();
3465 break;
3466 case DW_AT_type:
3467 param_type_die_form = form_value;
3468 break;
3469 case DW_AT_artificial:
3470 is_artificial = form_value.Boolean();
3471 break;
3472 case DW_AT_location:
3473 case DW_AT_const_value:
3474 case DW_AT_default_value:
3475 case DW_AT_description:
3476 case DW_AT_endianity:
3477 case DW_AT_is_optional:
3478 case DW_AT_segment:
3479 case DW_AT_variable_parameter:
3480 default:
3481 case DW_AT_abstract_origin:
3482 case DW_AT_sibling:
3483 break;
3484 }
3485 }
3486 }
3487
3488 bool skip = false;
3489 if (skip_artificial && is_artificial) {
3490 // In order to determine if a C++ member function is "const" we
3491 // have to look at the const-ness of "this"...
3492 if (arg_idx == 0 &&
3493 DeclKindIsCXXClass(containing_decl_ctx->getDeclKind()) &&
3494 // Often times compilers omit the "this" name for the
3495 // specification DIEs, so we can't rely upon the name being in
3496 // the formal parameter DIE...
3497 (name == NULL__null || ::strcmp(name, "this") == 0)) {
3498 Type *this_type = die.ResolveTypeUID(DIERef(param_type_die_form));
3499 if (this_type) {
3500 uint32_t encoding_mask = this_type->GetEncodingMask();
3501 if (encoding_mask & Type::eEncodingIsPointerUID) {
3502 is_static = false;
3503
3504 if (encoding_mask & (1u << Type::eEncodingIsConstUID))
3505 type_quals |= clang::Qualifiers::Const;
3506 if (encoding_mask & (1u << Type::eEncodingIsVolatileUID))
3507 type_quals |= clang::Qualifiers::Volatile;
3508 }
3509 }
3510 }
3511 skip = true;
3512 }
3513
3514 if (!skip) {
3515 Type *type = die.ResolveTypeUID(DIERef(param_type_die_form));
3516 if (type) {
3517 function_param_types.push_back(type->GetForwardCompilerType());
3518
3519 clang::ParmVarDecl *param_var_decl =
3520 m_ast.CreateParameterDeclaration(
3521 name, type->GetForwardCompilerType(), storage);
3522 assert(param_var_decl)(static_cast <bool> (param_var_decl) ? void (0) : __assert_fail
("param_var_decl", "/build/llvm-toolchain-snapshot-7~svn338205/tools/lldb/source/Plugins/SymbolFile/DWARF/DWARFASTParserClang.cpp"
, 3522, __extension__ __PRETTY_FUNCTION__))
;
3523 function_param_decls.push_back(param_var_decl);
3524
3525 m_ast.SetMetadataAsUserID(param_var_decl, die.GetID());
3526 }
3527 }
3528 }
3529 arg_idx++;
3530 } break;
3531
3532 case DW_TAG_unspecified_parameters:
3533 is_variadic = true;
3534 break;
3535
3536 case DW_TAG_template_type_parameter:
3537 case DW_TAG_template_value_parameter:
3538 case DW_TAG_GNU_template_parameter_pack:
3539 // The one caller of this was never using the template_param_infos, and
3540 // the local variable was taking up a large amount of stack space in
3541 // SymbolFileDWARF::ParseType() so this was removed. If we ever need the
3542 // template params back, we can add them back.
3543 // ParseTemplateDIE (dwarf_cu, die, template_param_infos);
3544 has_template_params = true;
3545 break;
3546
3547 default:
3548 break;
3549 }
3550 }
3551 return arg_idx;
3552}
3553
3554void DWARFASTParserClang::ParseChildArrayInfo(
3555 const SymbolContext &sc, const DWARFDIE &parent_die, int64_t &first_index,
3556 std::vector<uint64_t> &element_orders, uint32_t &byte_stride,
3557 uint32_t &bit_stride) {
3558 if (!parent_die)
3559 return;
3560
3561 for (DWARFDIE die = parent_die.GetFirstChild(); die.IsValid();
3562 die = die.GetSibling()) {
3563 const dw_tag_t tag = die.Tag();
3564 switch (tag) {
3565 case DW_TAG_subrange_type: {
3566 DWARFAttributes attributes;
3567 const size_t num_child_attributes = die.GetAttributes(attributes);
3568 if (num_child_attributes > 0) {
3569 uint64_t num_elements = 0;
3570 uint64_t lower_bound = 0;
3571 uint64_t upper_bound = 0;
3572 bool upper_bound_valid = false;
3573 uint32_t i;
3574 for (i = 0; i < num_child_attributes; ++i) {
3575 const dw_attr_t attr = attributes.AttributeAtIndex(i);
3576 DWARFFormValue form_value;
3577 if (attributes.ExtractFormValueAtIndex(i, form_value)) {
3578 switch (attr) {
3579 case DW_AT_name:
3580 break;
3581
3582 case DW_AT_count:
3583 num_elements = form_value.Unsigned();
3584 break;
3585
3586 case DW_AT_bit_stride:
3587 bit_stride = form_value.Unsigned();
3588 break;
3589
3590 case DW_AT_byte_stride:
3591 byte_stride = form_value.Unsigned();
3592 break;
3593
3594 case DW_AT_lower_bound:
3595 lower_bound = form_value.Unsigned();
3596 break;
3597
3598 case DW_AT_upper_bound:
3599 upper_bound_valid = true;
3600 upper_bound = form_value.Unsigned();
3601 break;
3602
3603 default:
3604 case DW_AT_abstract_origin:
3605 case DW_AT_accessibility:
3606 case DW_AT_allocated:
3607 case DW_AT_associated:
3608 case DW_AT_data_location:
3609 case DW_AT_declaration:
3610 case DW_AT_description:
3611 case DW_AT_sibling:
3612 case DW_AT_threads_scaled:
3613 case DW_AT_type:
3614 case DW_AT_visibility:
3615 break;
3616 }
3617 }
3618 }
3619
3620 if (num_elements == 0) {
3621 if (upper_bound_valid && upper_bound >= lower_bound)
3622 num_elements = upper_bound - lower_bound + 1;
3623 }
3624
3625 element_orders.push_back(num_elements);
3626 }
3627 } break;
3628 }
3629 }
3630}
3631
3632Type *DWARFASTParserClang::GetTypeForDIE(const DWARFDIE &die) {
3633 if (die) {
3634 SymbolFileDWARF *dwarf = die.GetDWARF();
3635 DWARFAttributes attributes;
3636 const size_t num_attributes = die.GetAttributes(attributes);
3637 if (num_attributes > 0) {
3638 DWARFFormValue type_die_form;
3639 for (size_t i = 0; i < num_attributes; ++i) {
3640 dw_attr_t attr = attributes.AttributeAtIndex(i);
3641 DWARFFormValue form_value;
3642
3643 if (attr == DW_AT_type &&
3644 attributes.ExtractFormValueAtIndex(i, form_value))
3645 return dwarf->ResolveTypeUID(dwarf->GetDIE(DIERef(form_value)), true);
3646 }
3647 }
3648 }
3649
3650 return nullptr;
3651}
3652
3653clang::Decl *DWARFASTParserClang::GetClangDeclForDIE(const DWARFDIE &die) {
3654 if (!die)
3655 return nullptr;
3656
3657 switch (die.Tag()) {
3658 case DW_TAG_variable:
3659 case DW_TAG_constant:
3660 case DW_TAG_formal_parameter:
3661 case DW_TAG_imported_declaration:
3662 case DW_TAG_imported_module:
3663 break;
3664 default:
3665 return nullptr;
3666 }
3667
3668 DIEToDeclMap::iterator cache_pos = m_die_to_decl.find(die.GetDIE());
3669 if (cache_pos != m_die_to_decl.end())
3670 return cache_pos->second;
3671
3672 if (DWARFDIE spec_die = die.GetReferencedDIE(DW_AT_specification)) {
3673 clang::Decl *decl = GetClangDeclForDIE(spec_die);
3674 m_die_to_decl[die.GetDIE()] = decl;
3675 m_decl_to_die[decl].insert(die.GetDIE());
3676 return decl;
3677 }
3678
3679 if (DWARFDIE abstract_origin_die =
3680 die.GetReferencedDIE(DW_AT_abstract_origin)) {
3681 clang::Decl *decl = GetClangDeclForDIE(abstract_origin_die);
3682 m_die_to_decl[die.GetDIE()] = decl;
3683 m_decl_to_die[decl].insert(die.GetDIE());
3684 return decl;
3685 }
3686
3687 clang::Decl *decl = nullptr;
3688 switch (die.Tag()) {
3689 case DW_TAG_variable:
3690 case DW_TAG_constant:
3691 case DW_TAG_formal_parameter: {
3692 SymbolFileDWARF *dwarf = die.GetDWARF();
3693 Type *type = GetTypeForDIE(die);
3694 if (dwarf && type) {
3695 const char *name = die.GetName();
3696 clang::DeclContext *decl_context =
3697 ClangASTContext::DeclContextGetAsDeclContext(
3698 dwarf->GetDeclContextContainingUID(die.GetID()));
3699 decl = m_ast.CreateVariableDeclaration(
3700 decl_context, name,
3701 ClangUtil::GetQualType(type->GetForwardCompilerType()));
3702 }
3703 break;
3704 }
3705 case DW_TAG_imported_declaration: {
3706 SymbolFileDWARF *dwarf = die.GetDWARF();
3707 DWARFDIE imported_uid = die.GetAttributeValueAsReferenceDIE(DW_AT_import);
3708 if (imported_uid) {
3709 CompilerDecl imported_decl = imported_uid.GetDecl();
3710 if (imported_decl) {
3711 clang::DeclContext *decl_context =
3712 ClangASTContext::DeclContextGetAsDeclContext(
3713 dwarf->GetDeclContextContainingUID(die.GetID()));
3714 if (clang::NamedDecl *clang_imported_decl =
3715 llvm::dyn_cast<clang::NamedDecl>(
3716 (clang::Decl *)imported_decl.GetOpaqueDecl()))
3717 decl =
3718 m_ast.CreateUsingDeclaration(decl_context, clang_imported_decl);
3719 }
3720 }
3721 break;
3722 }
3723 case DW_TAG_imported_module: {
3724 SymbolFileDWARF *dwarf = die.GetDWARF();
3725 DWARFDIE imported_uid = die.GetAttributeValueAsReferenceDIE(DW_AT_import);
3726
3727 if (imported_uid) {
3728 CompilerDeclContext imported_decl_ctx = imported_uid.GetDeclContext();
3729 if (imported_decl_ctx) {
3730 clang::DeclContext *decl_context =
3731 ClangASTContext::DeclContextGetAsDeclContext(
3732 dwarf->GetDeclContextContainingUID(die.GetID()));
3733 if (clang::NamespaceDecl *ns_decl =
3734 ClangASTContext::DeclContextGetAsNamespaceDecl(
3735 imported_decl_ctx))
3736 decl = m_ast.CreateUsingDirectiveDeclaration(decl_context, ns_decl);
3737 }
3738 }
3739 break;
3740 }
3741 default:
3742 break;
3743 }
3744
3745 m_die_to_decl[die.GetDIE()] = decl;
3746 m_decl_to_die[decl].insert(die.GetDIE());
3747
3748 return decl;
3749}
3750
3751clang::DeclContext *
3752DWARFASTParserClang::GetClangDeclContextForDIE(const DWARFDIE &die) {
3753 if (die) {
3754 clang::DeclContext *decl_ctx = GetCachedClangDeclContextForDIE(die);
3755 if (decl_ctx)
3756 return decl_ctx;
3757
3758 bool try_parsing_type = true;
3759 switch (die.Tag()) {
3760 case DW_TAG_compile_unit:
3761 case DW_TAG_partial_unit:
3762 decl_ctx = m_ast.GetTranslationUnitDecl();
3763 try_parsing_type = false;
3764 break;
3765
3766 case DW_TAG_namespace:
3767 decl_ctx = ResolveNamespaceDIE(die);
3768 try_parsing_type = false;
3769 break;
3770
3771 case DW_TAG_lexical_block:
3772 decl_ctx = GetDeclContextForBlock(die);
3773 try_parsing_type = false;
3774 break;
3775
3776 default:
3777 break;
3778 }
3779
3780 if (decl_ctx == nullptr && try_parsing_type) {
3781 Type *type = die.GetDWARF()->ResolveType(die);
3782 if (type)
3783 decl_ctx = GetCachedClangDeclContextForDIE(die);
3784 }
3785
3786 if (decl_ctx) {
3787 LinkDeclContextToDIE(decl_ctx, die);
3788 return decl_ctx;
3789 }
3790 }
3791 return nullptr;
3792}
3793
3794static bool IsSubroutine(const DWARFDIE &die) {
3795 switch (die.Tag()) {
3796 case DW_TAG_subprogram:
3797 case DW_TAG_inlined_subroutine:
3798 return true;
3799 default:
3800 return false;
3801 }
3802}
3803
3804static DWARFDIE GetContainingFunctionWithAbstractOrigin(const DWARFDIE &die) {
3805 for (DWARFDIE candidate = die; candidate; candidate = candidate.GetParent()) {
3806 if (IsSubroutine(candidate)) {
3807 if (candidate.GetReferencedDIE(DW_AT_abstract_origin)) {
3808 return candidate;
3809 } else {
3810 return DWARFDIE();
3811 }
3812 }
3813 }
3814 assert(0 && "Shouldn't call GetContainingFunctionWithAbstractOrigin on "(static_cast <bool> (0 && "Shouldn't call GetContainingFunctionWithAbstractOrigin on "
"something not in a function") ? void (0) : __assert_fail ("0 && \"Shouldn't call GetContainingFunctionWithAbstractOrigin on \" \"something not in a function\""
, "/build/llvm-toolchain-snapshot-7~svn338205/tools/lldb/source/Plugins/SymbolFile/DWARF/DWARFASTParserClang.cpp"
, 3815, __extension__ __PRETTY_FUNCTION__))
3815 "something not in a function")(static_cast <bool> (0 && "Shouldn't call GetContainingFunctionWithAbstractOrigin on "
"something not in a function") ? void (0) : __assert_fail ("0 && \"Shouldn't call GetContainingFunctionWithAbstractOrigin on \" \"something not in a function\""
, "/build/llvm-toolchain-snapshot-7~svn338205/tools/lldb/source/Plugins/SymbolFile/DWARF/DWARFASTParserClang.cpp"
, 3815, __extension__ __PRETTY_FUNCTION__))
;
3816 return DWARFDIE();
3817}
3818
3819static DWARFDIE FindAnyChildWithAbstractOrigin(const DWARFDIE &context) {
3820 for (DWARFDIE candidate = context.GetFirstChild(); candidate.IsValid();
3821 candidate = candidate.GetSibling()) {
3822 if (candidate.GetReferencedDIE(DW_AT_abstract_origin)) {
3823 return candidate;
3824 }
3825 }
3826 return DWARFDIE();
3827}
3828
3829static DWARFDIE FindFirstChildWithAbstractOrigin(const DWARFDIE &block,
3830 const DWARFDIE &function) {
3831 assert(IsSubroutine(function))(static_cast <bool> (IsSubroutine(function)) ? void (0)
: __assert_fail ("IsSubroutine(function)", "/build/llvm-toolchain-snapshot-7~svn338205/tools/lldb/source/Plugins/SymbolFile/DWARF/DWARFASTParserClang.cpp"
, 3831, __extension__ __PRETTY_FUNCTION__))
;
3832 for (DWARFDIE context = block; context != function.GetParent();
3833 context = context.GetParent()) {
3834 assert(!IsSubroutine(context) || context == function)(static_cast <bool> (!IsSubroutine(context) || context ==
function) ? void (0) : __assert_fail ("!IsSubroutine(context) || context == function"
, "/build/llvm-toolchain-snapshot-7~svn338205/tools/lldb/source/Plugins/SymbolFile/DWARF/DWARFASTParserClang.cpp"
, 3834, __extension__ __PRETTY_FUNCTION__))
;
3835 if (DWARFDIE child = FindAnyChildWithAbstractOrigin(context)) {
3836 return child;
3837 }
3838 }
3839 return DWARFDIE();
3840}
3841
3842clang::DeclContext *
3843DWARFASTParserClang::GetDeclContextForBlock(const DWARFDIE &die) {
3844 assert(die.Tag() == DW_TAG_lexical_block)(static_cast <bool> (die.Tag() == DW_TAG_lexical_block)
? void (0) : __assert_fail ("die.Tag() == DW_TAG_lexical_block"
, "/build/llvm-toolchain-snapshot-7~svn338205/tools/lldb/source/Plugins/SymbolFile/DWARF/DWARFASTParserClang.cpp"
, 3844, __extension__ __PRETTY_FUNCTION__))
;
3845 DWARFDIE containing_function_with_abstract_origin =
3846 GetContainingFunctionWithAbstractOrigin(die);
3847 if (!containing_function_with_abstract_origin) {
3848 return (clang::DeclContext *)ResolveBlockDIE(die);
3849 }
3850 DWARFDIE child = FindFirstChildWithAbstractOrigin(
3851 die, containing_function_with_abstract_origin);
3852 CompilerDeclContext decl_context =
3853 GetDeclContextContainingUIDFromDWARF(child);
3854 return (clang::DeclContext *)decl_context.GetOpaqueDeclContext();
3855}
3856
3857clang::BlockDecl *DWARFASTParserClang::ResolveBlockDIE(const DWARFDIE &die) {
3858 if (die && die.Tag() == DW_TAG_lexical_block) {
3859 clang::BlockDecl *decl =
3860 llvm::cast_or_null<clang::BlockDecl>(m_die_to_decl_ctx[die.GetDIE()]);
3861
3862 if (!decl) {
3863 DWARFDIE decl_context_die;
3864 clang::DeclContext *decl_context =
3865 GetClangDeclContextContainingDIE(die, &decl_context_die);
3866 decl = m_ast.CreateBlockDeclaration(decl_context);
3867
3868 if (decl)
3869 LinkDeclContextToDIE((clang::DeclContext *)decl, die);
3870 }
3871
3872 return decl;
3873 }
3874 return nullptr;
3875}
3876
3877clang::NamespaceDecl *
3878DWARFASTParserClang::ResolveNamespaceDIE(const DWARFDIE &die) {
3879 if (die && die.Tag() == DW_TAG_namespace) {
3880 // See if we already parsed this namespace DIE and associated it with a
3881 // uniqued namespace declaration
3882 clang::NamespaceDecl *namespace_decl =
3883 static_cast<clang::NamespaceDecl *>(m_die_to_decl_ctx[die.GetDIE()]);
3884 if (namespace_decl)
3885 return namespace_decl;
3886 else {
3887 const char *namespace_name = die.GetName();
3888 clang::DeclContext *containing_decl_ctx =
3889 GetClangDeclContextContainingDIE(die, nullptr);
3890 namespace_decl = m_ast.GetUniqueNamespaceDeclaration(namespace_name,
3891 containing_decl_ctx);
3892 Log *log =
3893 nullptr; // (LogChannelDWARF::GetLogIfAll(DWARF_LOG_DEBUG_INFO));
3894 if (log) {
3895 SymbolFileDWARF *dwarf = die.GetDWARF();
3896 if (namespace_name) {
3897 dwarf->GetObjectFile()->GetModule()->LogMessage(
3898 log, "ASTContext => %p: 0x%8.8" PRIx64"l" "x"
3899 ": DW_TAG_namespace with DW_AT_name(\"%s\") => "
3900 "clang::NamespaceDecl *%p (original = %p)",
3901 static_cast<void *>(m_ast.getASTContext()), die.GetID(),
3902 namespace_name, static_cast<void *>(namespace_decl),
3903 static_cast<void *>(namespace_decl->getOriginalNamespace()));
3904 } else {
3905 dwarf->GetObjectFile()->GetModule()->LogMessage(
3906 log, "ASTContext => %p: 0x%8.8" PRIx64"l" "x"
3907 ": DW_TAG_namespace (anonymous) => clang::NamespaceDecl *%p "
3908 "(original = %p)",
3909 static_cast<void *>(m_ast.getASTContext()), die.GetID(),
3910 static_cast<void *>(namespace_decl),
3911 static_cast<void *>(namespace_decl->getOriginalNamespace()));
3912 }
3913 }
3914
3915 if (namespace_decl)
3916 LinkDeclContextToDIE((clang::DeclContext *)namespace_decl, die);
3917 return namespace_decl;
3918 }
3919 }
3920 return nullptr;
3921}
3922
3923clang::DeclContext *DWARFASTParserClang::GetClangDeclContextContainingDIE(
3924 const DWARFDIE &die, DWARFDIE *decl_ctx_die_copy) {
3925 SymbolFileDWARF *dwarf = die.GetDWARF();
3926
3927 DWARFDIE decl_ctx_die = dwarf->GetDeclContextDIEContainingDIE(die);
3928
3929 if (decl_ctx_die_copy)
3930 *decl_ctx_die_copy = decl_ctx_die;
3931
3932 if (decl_ctx_die) {
3933 clang::DeclContext *clang_decl_ctx =
3934 GetClangDeclContextForDIE(decl_ctx_die);
3935 if (clang_decl_ctx)
3936 return clang_decl_ctx;
3937 }
3938 return m_ast.GetTranslationUnitDecl();
3939}
3940
3941clang::DeclContext *
3942DWARFASTParserClang::GetCachedClangDeclContextForDIE(const DWARFDIE &die) {
3943 if (die) {
3944 DIEToDeclContextMap::iterator pos = m_die_to_decl_ctx.find(die.GetDIE());
3945 if (pos != m_die_to_decl_ctx.end())
3946 return pos->second;
3947 }
3948 return nullptr;
3949}
3950
3951void DWARFASTParserClang::LinkDeclContextToDIE(clang::DeclContext *decl_ctx,
3952 const DWARFDIE &die) {
3953 m_die_to_decl_ctx[die.GetDIE()] = decl_ctx;
3954 // There can be many DIEs for a single decl context
3955 // m_decl_ctx_to_die[decl_ctx].insert(die.GetDIE());
3956 m_decl_ctx_to_die.insert(std::make_pair(decl_ctx, die));
3957}
3958
3959bool DWARFASTParserClang::CopyUniqueClassMethodTypes(
3960 const DWARFDIE &src_class_die, const DWARFDIE &dst_class_die,
3961 lldb_private::Type *class_type, DWARFDIECollection &failures) {
3962 if (!class_type || !src_class_die || !dst_class_die)
3963 return false;
3964 if (src_class_die.Tag() != dst_class_die.Tag())
3965 return false;
3966
3967 // We need to complete the class type so we can get all of the method types
3968 // parsed so we can then unique those types to their equivalent counterparts
3969 // in "dst_cu" and "dst_class_die"
3970 class_type->GetFullCompilerType();
3971
3972 DWARFDIE src_die;
3973 DWARFDIE dst_die;
3974 UniqueCStringMap<DWARFDIE> src_name_to_die;
3975 UniqueCStringMap<DWARFDIE> dst_name_to_die;
3976 UniqueCStringMap<DWARFDIE> src_name_to_die_artificial;
3977 UniqueCStringMap<DWARFDIE> dst_name_to_die_artificial;
3978 for (src_die = src_class_die.GetFirstChild(); src_die.IsValid();
3979 src_die = src_die.GetSibling()) {
3980 if (src_die.Tag() == DW_TAG_subprogram) {
3981 // Make sure this is a declaration and not a concrete instance by looking
3982 // for DW_AT_declaration set to 1. Sometimes concrete function instances
3983 // are placed inside the class definitions and shouldn't be included in
3984 // the list of things are are tracking here.
3985 if (src_die.GetAttributeValueAsUnsigned(DW_AT_declaration, 0) == 1) {
3986 const char *src_name = src_die.GetMangledName();
3987 if (src_name) {
3988 ConstString src_const_name(src_name);
3989 if (src_die.GetAttributeValueAsUnsigned(DW_AT_artificial, 0))
3990 src_name_to_die_artificial.Append(src_const_name, src_die);
3991 else
3992 src_name_to_die.Append(src_const_name, src_die);
3993 }
3994 }
3995 }
3996 }
3997 for (dst_die = dst_class_die.GetFirstChild(); dst_die.IsValid();
3998 dst_die = dst_die.GetSibling()) {
3999 if (dst_die.Tag() == DW_TAG_subprogram) {
4000 // Make sure this is a declaration and not a concrete instance by looking
4001 // for DW_AT_declaration set to 1. Sometimes concrete function instances
4002 // are placed inside the class definitions and shouldn't be included in
4003 // the list of things are are tracking here.
4004 if (dst_die.GetAttributeValueAsUnsigned(DW_AT_declaration, 0) == 1) {
4005 const char *dst_name = dst_die.GetMangledName();
4006 if (dst_name) {
4007 ConstString dst_const_name(dst_name);
4008 if (dst_die.GetAttributeValueAsUnsigned(DW_AT_artificial, 0))
4009 dst_name_to_die_artificial.Append(dst_const_name, dst_die);
4010 else
4011 dst_name_to_die.Append(dst_const_name, dst_die);
4012 }
4013 }
4014 }
4015 }
4016 const uint32_t src_size = src_name_to_die.GetSize();
4017 const uint32_t dst_size = dst_name_to_die.GetSize();
4018 Log *log = nullptr; // (LogChannelDWARF::GetLogIfAny(DWARF_LOG_DEBUG_INFO |
4019 // DWARF_LOG_TYPE_COMPLETION));
4020
4021 // Is everything kosher so we can go through the members at top speed?
4022 bool fast_path = true;
4023
4024 if (src_size != dst_size) {
4025 if (src_size != 0 && dst_size != 0) {
4026 if (log)
4027 log->Printf("warning: trying to unique class DIE 0x%8.8x to 0x%8.8x, "
4028 "but they didn't have the same size (src=%d, dst=%d)",
4029 src_class_die.GetOffset(), dst_class_die.GetOffset(),
4030 src_size, dst_size);
4031 }
4032
4033 fast_path = false;
4034 }
4035
4036 uint32_t idx;
4037
4038 if (fast_path) {
4039 for (idx = 0; idx < src_size; ++idx) {
4040 src_die = src_name_to_die.GetValueAtIndexUnchecked(idx);
4041 dst_die = dst_name_to_die.GetValueAtIndexUnchecked(idx);
4042
4043 if (src_die.Tag() != dst_die.Tag()) {
4044 if (log)
4045 log->Printf("warning: tried to unique class DIE 0x%8.8x to 0x%8.8x, "
4046 "but 0x%8.8x (%s) tags didn't match 0x%8.8x (%s)",
4047 src_class_die.GetOffset(), dst_class_die.GetOffset(),
4048 src_die.GetOffset(), src_die.GetTagAsCString(),
4049 dst_die.GetOffset(), dst_die.GetTagAsCString());
4050 fast_path = false;
4051 }
4052
4053 const char *src_name = src_die.GetMangledName();
4054 const char *dst_name = dst_die.GetMangledName();
4055
4056 // Make sure the names match
4057 if (src_name == dst_name || (strcmp(src_name, dst_name) == 0))
4058 continue;
4059
4060 if (log)
4061 log->Printf("warning: tried to unique class DIE 0x%8.8x to 0x%8.8x, "
4062 "but 0x%8.8x (%s) names didn't match 0x%8.8x (%s)",
4063 src_class_die.GetOffset(), dst_class_die.GetOffset(),
4064 src_die.GetOffset(), src_name, dst_die.GetOffset(),
4065 dst_name);
4066
4067 fast_path = false;
4068 }
4069 }
4070
4071 DWARFASTParserClang *src_dwarf_ast_parser =
4072 (DWARFASTParserClang *)src_die.GetDWARFParser();
4073 DWARFASTParserClang *dst_dwarf_ast_parser =
4074 (DWARFASTParserClang *)dst_die.GetDWARFParser();
4075
4076 // Now do the work of linking the DeclContexts and Types.
4077 if (fast_path) {
4078 // We can do this quickly. Just run across the tables index-for-index
4079 // since we know each node has matching names and tags.
4080 for (idx = 0; idx < src_size; ++idx) {
4081 src_die = src_name_to_die.GetValueAtIndexUnchecked(idx);
4082 dst_die = dst_name_to_die.GetValueAtIndexUnchecked(idx);
4083
4084 clang::DeclContext *src_decl_ctx =
4085 src_dwarf_ast_parser->m_die_to_decl_ctx[src_die.GetDIE()];
4086 if (src_decl_ctx) {
4087 if (log)
4088 log->Printf("uniquing decl context %p from 0x%8.8x for 0x%8.8x",
4089 static_cast<void *>(src_decl_ctx), src_die.GetOffset(),
4090 dst_die.GetOffset());
4091 dst_dwarf_ast_parser->LinkDeclContextToDIE(src_decl_ctx, dst_die);
4092 } else {
4093 if (log)
4094 log->Printf("warning: tried to unique decl context from 0x%8.8x for "
4095 "0x%8.8x, but none was found",
4096 src_die.GetOffset(), dst_die.GetOffset());
4097 }
4098
4099 Type *src_child_type =
4100 dst_die.GetDWARF()->GetDIEToType()[src_die.GetDIE()];
4101 if (src_child_type) {
4102 if (log)
4103 log->Printf(
4104 "uniquing type %p (uid=0x%" PRIx64"l" "x" ") from 0x%8.8x for 0x%8.8x",
4105 static_cast<void *>(src_child_type), src_child_type->GetID(),
4106 src_die.GetOffset(), dst_die.GetOffset());
4107 dst_die.GetDWARF()->GetDIEToType()[dst_die.GetDIE()] = src_child_type;
4108 } else {
4109 if (log)
4110 log->Printf("warning: tried to unique lldb_private::Type from "
4111 "0x%8.8x for 0x%8.8x, but none was found",
4112 src_die.GetOffset(), dst_die.GetOffset());
4113 }
4114 }
4115 } else {
4116 // We must do this slowly. For each member of the destination, look up a
4117 // member in the source with the same name, check its tag, and unique them
4118 // if everything matches up. Report failures.
4119
4120 if (!src_name_to_die.IsEmpty() && !dst_name_to_die.IsEmpty()) {
4121 src_name_to_die.Sort();
4122
4123 for (idx = 0; idx < dst_size; ++idx) {
4124 ConstString dst_name = dst_name_to_die.GetCStringAtIndex(idx);
4125 dst_die = dst_name_to_die.GetValueAtIndexUnchecked(idx);
4126 src_die = src_name_to_die.Find(dst_name, DWARFDIE());
4127
4128 if (src_die && (src_die.Tag() == dst_die.Tag())) {
4129 clang::DeclContext *src_decl_ctx =
4130 src_dwarf_ast_parser->m_die_to_decl_ctx[src_die.GetDIE()];
4131 if (src_decl_ctx) {
4132 if (log)
4133 log->Printf("uniquing decl context %p from 0x%8.8x for 0x%8.8x",
4134 static_cast<void *>(src_decl_ctx),
4135 src_die.GetOffset(), dst_die.GetOffset());
4136 dst_dwarf_ast_parser->LinkDeclContextToDIE(src_decl_ctx, dst_die);
4137 } else {
4138 if (log)
4139 log->Printf("warning: tried to unique decl context from 0x%8.8x "
4140 "for 0x%8.8x, but none was found",
4141 src_die.GetOffset(), dst_die.GetOffset());
4142 }
4143
4144 Type *src_child_type =
4145 dst_die.GetDWARF()->GetDIEToType()[src_die.GetDIE()];
4146 if (src_child_type) {
4147 if (log)
4148 log->Printf("uniquing type %p (uid=0x%" PRIx64"l" "x"
4149 ") from 0x%8.8x for 0x%8.8x",
4150 static_cast<void *>(src_child_type),
4151 src_child_type->GetID(), src_die.GetOffset(),
4152 dst_die.GetOffset());
4153 dst_die.GetDWARF()->GetDIEToType()[dst_die.GetDIE()] =
4154 src_child_type;
4155 } else {
4156 if (log)
4157 log->Printf("warning: tried to unique lldb_private::Type from "
4158 "0x%8.8x for 0x%8.8x, but none was found",
4159 src_die.GetOffset(), dst_die.GetOffset());
4160 }
4161 } else {
4162 if (log)
4163 log->Printf("warning: couldn't find a match for 0x%8.8x",
4164 dst_die.GetOffset());
4165
4166 failures.Append(dst_die);
4167 }
4168 }
4169 }
4170 }
4171
4172 const uint32_t src_size_artificial = src_name_to_die_artificial.GetSize();
4173 const uint32_t dst_size_artificial = dst_name_to_die_artificial.GetSize();
4174
4175 if (src_size_artificial && dst_size_artificial) {
4176 dst_name_to_die_artificial.Sort();
4177
4178 for (idx = 0; idx < src_size_artificial; ++idx) {
4179 ConstString src_name_artificial =
4180 src_name_to_die_artificial.GetCStringAtIndex(idx);
4181 src_die = src_name_to_die_artificial.GetValueAtIndexUnchecked(idx);
4182 dst_die =
4183 dst_name_to_die_artificial.Find(src_name_artificial, DWARFDIE());
4184
4185 if (dst_die) {
4186 // Both classes have the artificial types, link them
4187 clang::DeclContext *src_decl_ctx =
4188 src_dwarf_ast_parser->m_die_to_decl_ctx[src_die.GetDIE()];
4189 if (src_decl_ctx) {
4190 if (log)
4191 log->Printf("uniquing decl context %p from 0x%8.8x for 0x%8.8x",
4192 static_cast<void *>(src_decl_ctx), src_die.GetOffset(),
4193 dst_die.GetOffset());
4194 dst_dwarf_ast_parser->LinkDeclContextToDIE(src_decl_ctx, dst_die);
4195 } else {
4196 if (log)
4197 log->Printf("warning: tried to unique decl context from 0x%8.8x "
4198 "for 0x%8.8x, but none was found",
4199 src_die.GetOffset(), dst_die.GetOffset());
4200 }
4201
4202 Type *src_child_type =
4203 dst_die.GetDWARF()->GetDIEToType()[src_die.GetDIE()];
4204 if (src_child_type) {
4205 if (log)
4206 log->Printf(
4207 "uniquing type %p (uid=0x%" PRIx64"l" "x" ") from 0x%8.8x for 0x%8.8x",
4208 static_cast<void *>(src_child_type), src_child_type->GetID(),
4209 src_die.GetOffset(), dst_die.GetOffset());
4210 dst_die.GetDWARF()->GetDIEToType()[dst_die.GetDIE()] = src_child_type;
4211 } else {
4212 if (log)
4213 log->Printf("warning: tried to unique lldb_private::Type from "
4214 "0x%8.8x for 0x%8.8x, but none was found",
4215 src_die.GetOffset(), dst_die.GetOffset());
4216 }
4217 }
4218 }
4219 }
4220
4221 if (dst_size_artificial) {
4222 for (idx = 0; idx < dst_size_artificial; ++idx) {
4223 ConstString dst_name_artificial =
4224 dst_name_to_die_artificial.GetCStringAtIndex(idx);
4225 dst_die = dst_name_to_die_artificial.GetValueAtIndexUnchecked(idx);
4226 if (log)
4227 log->Printf("warning: need to create artificial method for 0x%8.8x for "
4228 "method '%s'",
4229 dst_die.GetOffset(), dst_name_artificial.GetCString());
4230
4231 failures.Append(dst_die);
4232 }
4233 }
4234
4235 return (failures.Size() != 0);
4236}