Bug Summary

File:tools/lldb/source/Plugins/SymbolFile/DWARF/DWARFASTParserClang.cpp
Warning:line 1357, column 21
Value stored to 'class_symfile' is never read

Annotated Source Code

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 "DWARFCompileUnit.h"
14#include "DWARFDIE.h"
15#include "DWARFDIECollection.h"
16#include "DWARFDebugInfo.h"
17#include "DWARFDeclContext.h"
18#include "DWARFDefines.h"
19#include "SymbolFileDWARF.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/Interpreter/Args.h"
28#include "lldb/Symbol/ClangASTImporter.h"
29#include "lldb/Symbol/ClangExternalASTSourceCommon.h"
30#include "lldb/Symbol/ClangUtil.h"
31#include "lldb/Symbol/CompileUnit.h"
32#include "lldb/Symbol/Function.h"
33#include "lldb/Symbol/ObjectFile.h"
34#include "lldb/Symbol/SymbolVendor.h"
35#include "lldb/Symbol/TypeList.h"
36#include "lldb/Symbol/TypeMap.h"
37#include "lldb/Target/Language.h"
38#include "lldb/Utility/LLDBAssert.h"
39#include "lldb/Utility/Log.h"
40#include "lldb/Utility/StreamString.h"
41
42#include "clang/AST/DeclCXX.h"
43#include "clang/AST/DeclObjC.h"
44
45#include <map>
46#include <vector>
47
48//#define ENABLE_DEBUG_PRINTF // COMMENT OUT THIS LINE PRIOR TO CHECKIN
49
50#ifdef ENABLE_DEBUG_PRINTF
51#include <stdio.h>
52#define DEBUG_PRINTF(fmt, ...) printf(fmt, __VA_ARGS__)
53#else
54#define DEBUG_PRINTF(fmt, ...)
55#endif
56
57using namespace lldb;
58using namespace lldb_private;
59DWARFASTParserClang::DWARFASTParserClang(ClangASTContext &ast)
60 : m_ast(ast), m_die_to_decl_ctx(), m_decl_ctx_to_die() {}
61
62DWARFASTParserClang::~DWARFASTParserClang() {}
63
64static AccessType DW_ACCESS_to_AccessType(uint32_t dwarf_accessibility) {
65 switch (dwarf_accessibility) {
66 case DW_ACCESS_public:
67 return eAccessPublic;
68 case DW_ACCESS_private:
69 return eAccessPrivate;
70 case DW_ACCESS_protected:
71 return eAccessProtected;
72 default:
73 break;
74 }
75 return eAccessNone;
76}
77
78static bool DeclKindIsCXXClass(clang::Decl::Kind decl_kind) {
79 switch (decl_kind) {
80 case clang::Decl::CXXRecord:
81 case clang::Decl::ClassTemplateSpecialization:
82 return true;
83 default:
84 break;
85 }
86 return false;
87}
88
89struct BitfieldInfo {
90 uint64_t bit_size;
91 uint64_t bit_offset;
92
93 BitfieldInfo()
94 : bit_size(LLDB_INVALID_ADDRESS(18446744073709551615UL)), bit_offset(LLDB_INVALID_ADDRESS(18446744073709551615UL)) {}
95
96 void Clear() {
97 bit_size = LLDB_INVALID_ADDRESS(18446744073709551615UL);
98 bit_offset = LLDB_INVALID_ADDRESS(18446744073709551615UL);
99 }
100
101 bool IsValid() const {
102 return (bit_size != LLDB_INVALID_ADDRESS(18446744073709551615UL)) &&
103 (bit_offset != LLDB_INVALID_ADDRESS(18446744073709551615UL));
104 }
105
106 bool NextBitfieldOffsetIsValid(const uint64_t next_bit_offset) const {
107 if (IsValid()) {
108 // This bitfield info is valid, so any subsequent bitfields
109 // must not overlap and must be at a higher bit offset than
110 // any previous bitfield + size.
111 return (bit_size + bit_offset) <= next_bit_offset;
112 } else {
113 // If the this BitfieldInfo is not valid, then any offset isOK
114 return true;
115 }
116 }
117};
118
119ClangASTImporter &DWARFASTParserClang::GetClangASTImporter() {
120 if (!m_clang_ast_importer_ap) {
121 m_clang_ast_importer_ap.reset(new ClangASTImporter);
122 }
123 return *m_clang_ast_importer_ap;
124}
125
126TypeSP DWARFASTParserClang::ParseTypeFromDWO(const DWARFDIE &die, Log *log) {
127 ModuleSP dwo_module_sp = die.GetContainingDWOModule();
128 if (dwo_module_sp) {
129 // This type comes from an external DWO module
130 std::vector<CompilerContext> dwo_context;
131 die.GetDWOContext(dwo_context);
132 TypeMap dwo_types;
133 if (dwo_module_sp->GetSymbolVendor()->FindTypes(dwo_context, true,
134 dwo_types)) {
135 const size_t num_dwo_types = dwo_types.GetSize();
136 if (num_dwo_types == 1) {
137 // We found a real definition for this type elsewhere
138 // so lets use it and cache the fact that we found
139 // a complete type for this die
140 TypeSP dwo_type_sp = dwo_types.GetTypeAtIndex(0);
141 if (dwo_type_sp) {
142 lldb_private::CompilerType dwo_type =
143 dwo_type_sp->GetForwardCompilerType();
144
145 lldb_private::CompilerType type =
146 GetClangASTImporter().CopyType(m_ast, dwo_type);
147
148 // printf ("copied_qual_type: ast = %p, clang_type = %p, name =
149 // '%s'\n", m_ast, copied_qual_type.getAsOpaquePtr(),
150 // external_type->GetName().GetCString());
151 if (type) {
152 SymbolFileDWARF *dwarf = die.GetDWARF();
153 TypeSP type_sp(new Type(die.GetID(), dwarf, dwo_type_sp->GetName(),
154 dwo_type_sp->GetByteSize(), NULL__null,
155 LLDB_INVALID_UID(18446744073709551615UL), Type::eEncodingInvalid,
156 &dwo_type_sp->GetDeclaration(), type,
157 Type::eResolveStateForward));
158
159 dwarf->GetTypeList()->Insert(type_sp);
160 dwarf->GetDIEToType()[die.GetDIE()] = type_sp.get();
161 clang::TagDecl *tag_decl = ClangASTContext::GetAsTagDecl(type);
162 if (tag_decl)
163 LinkDeclContextToDIE(tag_decl, die);
164 else {
165 clang::DeclContext *defn_decl_ctx =
166 GetCachedClangDeclContextForDIE(die);
167 if (defn_decl_ctx)
168 LinkDeclContextToDIE(defn_decl_ctx, die);
169 }
170 return type_sp;
171 }
172 }
173 }
174 }
175 }
176 return TypeSP();
177}
178
179TypeSP DWARFASTParserClang::ParseTypeFromDWARF(const SymbolContext &sc,
180 const DWARFDIE &die, Log *log,
181 bool *type_is_new_ptr) {
182 TypeSP type_sp;
183
184 if (type_is_new_ptr)
185 *type_is_new_ptr = false;
186
187 AccessType accessibility = eAccessNone;
188 if (die) {
189 SymbolFileDWARF *dwarf = die.GetDWARF();
190 if (log) {
191 DWARFDIE context_die;
192 clang::DeclContext *context =
193 GetClangDeclContextContainingDIE(die, &context_die);
194
195 dwarf->GetObjectFile()->GetModule()->LogMessage(
196 log, "SymbolFileDWARF::ParseType (die = 0x%8.8x, decl_ctx = %p (die "
197 "0x%8.8x)) %s name = '%s')",
198 die.GetOffset(), static_cast<void *>(context),
199 context_die.GetOffset(), die.GetTagAsCString(), die.GetName());
200 }
201 //
202 // Log *log (LogChannelDWARF::GetLogIfAll(DWARF_LOG_DEBUG_INFO));
203 // if (log && dwarf_cu)
204 // {
205 // StreamString s;
206 // die->DumpLocation (this, dwarf_cu, s);
207 // dwarf->GetObjectFile()->GetModule()->LogMessage (log,
208 // "SymbolFileDwarf::%s %s", __FUNCTION__, s.GetData());
209 //
210 // }
211
212 Type *type_ptr = dwarf->GetDIEToType().lookup(die.GetDIE());
213 TypeList *type_list = dwarf->GetTypeList();
214 if (type_ptr == NULL__null) {
215 if (type_is_new_ptr)
216 *type_is_new_ptr = true;
217
218 const dw_tag_t tag = die.Tag();
219
220 bool is_forward_declaration = false;
221 DWARFAttributes attributes;
222 const char *type_name_cstr = NULL__null;
223 ConstString type_name_const_str;
224 Type::ResolveState resolve_state = Type::eResolveStateUnresolved;
225 uint64_t byte_size = 0;
226 Declaration decl;
227
228 Type::EncodingDataType encoding_data_type = Type::eEncodingIsUID;
229 CompilerType clang_type;
230 DWARFFormValue form_value;
231
232 dw_attr_t attr;
233
234 switch (tag) {
235 case DW_TAG_typedef:
236 case DW_TAG_base_type:
237 case DW_TAG_pointer_type:
238 case DW_TAG_reference_type:
239 case DW_TAG_rvalue_reference_type:
240 case DW_TAG_const_type:
241 case DW_TAG_restrict_type:
242 case DW_TAG_volatile_type:
243 case DW_TAG_unspecified_type: {
244 // Set a bit that lets us know that we are currently parsing this
245 dwarf->GetDIEToType()[die.GetDIE()] = DIE_IS_BEING_PARSED((lldb_private::Type *)1);
246
247 const size_t num_attributes = die.GetAttributes(attributes);
248 uint32_t encoding = 0;
249 DWARFFormValue encoding_uid;
250
251 if (num_attributes > 0) {
252 uint32_t i;
253 for (i = 0; i < num_attributes; ++i) {
254 attr = attributes.AttributeAtIndex(i);
255 if (attributes.ExtractFormValueAtIndex(i, form_value)) {
256 switch (attr) {
257 case DW_AT_decl_file:
258 decl.SetFile(sc.comp_unit->GetSupportFiles().GetFileSpecAtIndex(
259 form_value.Unsigned()));
260 break;
261 case DW_AT_decl_line:
262 decl.SetLine(form_value.Unsigned());
263 break;
264 case DW_AT_decl_column:
265 decl.SetColumn(form_value.Unsigned());
266 break;
267 case DW_AT_name:
268
269 type_name_cstr = form_value.AsCString();
270 // Work around a bug in llvm-gcc where they give a name to a
271 // reference type which doesn't
272 // include the "&"...
273 if (tag == DW_TAG_reference_type) {
274 if (strchr(type_name_cstr, '&') == NULL__null)
275 type_name_cstr = NULL__null;
276 }
277 if (type_name_cstr)
278 type_name_const_str.SetCString(type_name_cstr);
279 break;
280 case DW_AT_byte_size:
281 byte_size = form_value.Unsigned();
282 break;
283 case DW_AT_encoding:
284 encoding = form_value.Unsigned();
285 break;
286 case DW_AT_type:
287 encoding_uid = form_value;
288 break;
289 default:
290 case DW_AT_sibling:
291 break;
292 }
293 }
294 }
295 }
296
297 if (tag == DW_TAG_typedef && encoding_uid.IsValid()) {
298 // Try to parse a typedef from the DWO file first as modules
299 // can contain typedef'ed structures that have no names like:
300 //
301 // typedef struct { int a; } Foo;
302 //
303 // In this case we will have a structure with no name and a
304 // typedef named "Foo" that points to this unnamed structure.
305 // The name in the typedef is the only identifier for the struct,
306 // so always try to get typedefs from DWO files if possible.
307 //
308 // The type_sp returned will be empty if the typedef doesn't exist
309 // in a DWO file, so it is cheap to call this function just to check.
310 //
311 // If we don't do this we end up creating a TypeSP that says this
312 // is a typedef to type 0x123 (the DW_AT_type value would be 0x123
313 // in the DW_TAG_typedef), and this is the unnamed structure type.
314 // We will have a hard time tracking down an unnammed structure
315 // type in the module DWO file, so we make sure we don't get into
316 // this situation by always resolving typedefs from the DWO file.
317 const DWARFDIE encoding_die = dwarf->GetDIE(DIERef(encoding_uid));
318
319 // First make sure that the die that this is typedef'ed to _is_
320 // just a declaration (DW_AT_declaration == 1), not a full definition
321 // since template types can't be represented in modules since only
322 // concrete instances of templates are ever emitted and modules
323 // won't contain those
324 if (encoding_die &&
325 encoding_die.GetAttributeValueAsUnsigned(DW_AT_declaration, 0) ==
326 1) {
327 type_sp = ParseTypeFromDWO(die, log);
328 if (type_sp)
329 return type_sp;
330 }
331 }
332
333 DEBUG_PRINTF("0x%8.8" PRIx64 ": %s (\"%s\") type => 0x%8.8lx\n",
334 die.GetID(), DW_TAG_value_to_name(tag), type_name_cstr,
335 encoding_uid.Reference());
336
337 switch (tag) {
338 default:
339 break;
340
341 case DW_TAG_unspecified_type:
342 if (strcmp(type_name_cstr, "nullptr_t") == 0 ||
343 strcmp(type_name_cstr, "decltype(nullptr)") == 0) {
344 resolve_state = Type::eResolveStateFull;
345 clang_type = m_ast.GetBasicType(eBasicTypeNullPtr);
346 break;
347 }
348 // Fall through to base type below in case we can handle the type
349 // there...
350 LLVM_FALLTHROUGH[[clang::fallthrough]];
351
352 case DW_TAG_base_type:
353 resolve_state = Type::eResolveStateFull;
354 clang_type = m_ast.GetBuiltinTypeForDWARFEncodingAndBitSize(
355 type_name_cstr, encoding, byte_size * 8);
356 break;
357
358 case DW_TAG_pointer_type:
359 encoding_data_type = Type::eEncodingIsPointerUID;
360 break;
361 case DW_TAG_reference_type:
362 encoding_data_type = Type::eEncodingIsLValueReferenceUID;
363 break;
364 case DW_TAG_rvalue_reference_type:
365 encoding_data_type = Type::eEncodingIsRValueReferenceUID;
366 break;
367 case DW_TAG_typedef:
368 encoding_data_type = Type::eEncodingIsTypedefUID;
369 break;
370 case DW_TAG_const_type:
371 encoding_data_type = Type::eEncodingIsConstUID;
372 break;
373 case DW_TAG_restrict_type:
374 encoding_data_type = Type::eEncodingIsRestrictUID;
375 break;
376 case DW_TAG_volatile_type:
377 encoding_data_type = Type::eEncodingIsVolatileUID;
378 break;
379 }
380
381 if (!clang_type &&
382 (encoding_data_type == Type::eEncodingIsPointerUID ||
383 encoding_data_type == Type::eEncodingIsTypedefUID) &&
384 sc.comp_unit != NULL__null) {
385 if (tag == DW_TAG_pointer_type) {
386 DWARFDIE target_die = die.GetReferencedDIE(DW_AT_type);
387
388 if (target_die.GetAttributeValueAsUnsigned(DW_AT_APPLE_block, 0)) {
389 // Blocks have a __FuncPtr inside them which is a pointer to a
390 // function of the proper type.
391
392 for (DWARFDIE child_die = target_die.GetFirstChild();
393 child_die.IsValid(); child_die = child_die.GetSibling()) {
394 if (!strcmp(child_die.GetAttributeValueAsString(DW_AT_name, ""),
395 "__FuncPtr")) {
396 DWARFDIE function_pointer_type =
397 child_die.GetReferencedDIE(DW_AT_type);
398
399 if (function_pointer_type) {
400 DWARFDIE function_type =
401 function_pointer_type.GetReferencedDIE(DW_AT_type);
402
403 bool function_type_is_new_pointer;
404 TypeSP lldb_function_type_sp = ParseTypeFromDWARF(
405 sc, function_type, log, &function_type_is_new_pointer);
406
407 if (lldb_function_type_sp) {
408 clang_type = m_ast.CreateBlockPointerType(
409 lldb_function_type_sp->GetForwardCompilerType());
410 encoding_data_type = Type::eEncodingIsUID;
411 encoding_uid.Clear();
412 resolve_state = Type::eResolveStateFull;
413 }
414 }
415
416 break;
417 }
418 }
419 }
420 }
421
422 bool translation_unit_is_objc =
423 (sc.comp_unit->GetLanguage() == eLanguageTypeObjC ||
424 sc.comp_unit->GetLanguage() == eLanguageTypeObjC_plus_plus);
425
426 if (translation_unit_is_objc) {
427 if (type_name_cstr != NULL__null) {
428 static ConstString g_objc_type_name_id("id");
429 static ConstString g_objc_type_name_Class("Class");
430 static ConstString g_objc_type_name_selector("SEL");
431
432 if (type_name_const_str == g_objc_type_name_id) {
433 if (log)
434 dwarf->GetObjectFile()->GetModule()->LogMessage(
435 log, "SymbolFileDWARF::ParseType (die = 0x%8.8x) %s '%s' "
436 "is Objective C 'id' built-in type.",
437 die.GetOffset(), die.GetTagAsCString(), die.GetName());
438 clang_type = m_ast.GetBasicType(eBasicTypeObjCID);
439 encoding_data_type = Type::eEncodingIsUID;
440 encoding_uid.Clear();
441 resolve_state = Type::eResolveStateFull;
442
443 } else if (type_name_const_str == g_objc_type_name_Class) {
444 if (log)
445 dwarf->GetObjectFile()->GetModule()->LogMessage(
446 log, "SymbolFileDWARF::ParseType (die = 0x%8.8x) %s '%s' "
447 "is Objective C 'Class' built-in type.",
448 die.GetOffset(), die.GetTagAsCString(), die.GetName());
449 clang_type = m_ast.GetBasicType(eBasicTypeObjCClass);
450 encoding_data_type = Type::eEncodingIsUID;
451 encoding_uid.Clear();
452 resolve_state = Type::eResolveStateFull;
453 } else if (type_name_const_str == g_objc_type_name_selector) {
454 if (log)
455 dwarf->GetObjectFile()->GetModule()->LogMessage(
456 log, "SymbolFileDWARF::ParseType (die = 0x%8.8x) %s '%s' "
457 "is Objective C 'selector' built-in type.",
458 die.GetOffset(), die.GetTagAsCString(), die.GetName());
459 clang_type = m_ast.GetBasicType(eBasicTypeObjCSel);
460 encoding_data_type = Type::eEncodingIsUID;
461 encoding_uid.Clear();
462 resolve_state = Type::eResolveStateFull;
463 }
464 } else if (encoding_data_type == Type::eEncodingIsPointerUID &&
465 encoding_uid.IsValid()) {
466 // Clang sometimes erroneously emits id as objc_object*. In that
467 // case we fix up the type to "id".
468
469 const DWARFDIE encoding_die = dwarf->GetDIE(DIERef(encoding_uid));
470
471 if (encoding_die && encoding_die.Tag() == DW_TAG_structure_type) {
472 if (const char *struct_name = encoding_die.GetName()) {
473 if (!strcmp(struct_name, "objc_object")) {
474 if (log)
475 dwarf->GetObjectFile()->GetModule()->LogMessage(
476 log, "SymbolFileDWARF::ParseType (die = 0x%8.8x) %s "
477 "'%s' is 'objc_object*', which we overrode to "
478 "'id'.",
479 die.GetOffset(), die.GetTagAsCString(),
480 die.GetName());
481 clang_type = m_ast.GetBasicType(eBasicTypeObjCID);
482 encoding_data_type = Type::eEncodingIsUID;
483 encoding_uid.Clear();
484 resolve_state = Type::eResolveStateFull;
485 }
486 }
487 }
488 }
489 }
490 }
491
492 type_sp.reset(
493 new Type(die.GetID(), dwarf, type_name_const_str, byte_size, NULL__null,
494 DIERef(encoding_uid).GetUID(dwarf), encoding_data_type,
495 &decl, clang_type, resolve_state));
496
497 dwarf->GetDIEToType()[die.GetDIE()] = type_sp.get();
498
499 // Type* encoding_type =
500 // GetUniquedTypeForDIEOffset(encoding_uid, type_sp,
501 // NULL, 0, 0, false);
502 // if (encoding_type != NULL)
503 // {
504 // if (encoding_type != DIE_IS_BEING_PARSED)
505 // type_sp->SetEncodingType(encoding_type);
506 // else
507 // m_indirect_fixups.push_back(type_sp.get());
508 // }
509 } break;
510
511 case DW_TAG_structure_type:
512 case DW_TAG_union_type:
513 case DW_TAG_class_type: {
514 // Set a bit that lets us know that we are currently parsing this
515 dwarf->GetDIEToType()[die.GetDIE()] = DIE_IS_BEING_PARSED((lldb_private::Type *)1);
516 bool byte_size_valid = false;
517
518 LanguageType class_language = eLanguageTypeUnknown;
519 bool is_complete_objc_class = false;
520 // bool struct_is_class = false;
521 const size_t num_attributes = die.GetAttributes(attributes);
522 if (num_attributes > 0) {
523 uint32_t i;
524 for (i = 0; i < num_attributes; ++i) {
525 attr = attributes.AttributeAtIndex(i);
526 if (attributes.ExtractFormValueAtIndex(i, form_value)) {
527 switch (attr) {
528 case DW_AT_decl_file:
529 if (die.GetCU()->DW_AT_decl_file_attributes_are_invalid()) {
530 // llvm-gcc outputs invalid DW_AT_decl_file attributes that
531 // always
532 // point to the compile unit file, so we clear this invalid
533 // value
534 // so that we can still unique types efficiently.
535 decl.SetFile(FileSpec("<invalid>", false));
536 } else
537 decl.SetFile(
538 sc.comp_unit->GetSupportFiles().GetFileSpecAtIndex(
539 form_value.Unsigned()));
540 break;
541
542 case DW_AT_decl_line:
543 decl.SetLine(form_value.Unsigned());
544 break;
545
546 case DW_AT_decl_column:
547 decl.SetColumn(form_value.Unsigned());
548 break;
549
550 case DW_AT_name:
551 type_name_cstr = form_value.AsCString();
552 type_name_const_str.SetCString(type_name_cstr);
553 break;
554
555 case DW_AT_byte_size:
556 byte_size = form_value.Unsigned();
557 byte_size_valid = true;
558 break;
559
560 case DW_AT_accessibility:
561 accessibility = DW_ACCESS_to_AccessType(form_value.Unsigned());
562 break;
563
564 case DW_AT_declaration:
565 is_forward_declaration = form_value.Boolean();
566 break;
567
568 case DW_AT_APPLE_runtime_class:
569 class_language = (LanguageType)form_value.Signed();
570 break;
571
572 case DW_AT_APPLE_objc_complete_type:
573 is_complete_objc_class = form_value.Signed();
574 break;
575
576 case DW_AT_allocated:
577 case DW_AT_associated:
578 case DW_AT_data_location:
579 case DW_AT_description:
580 case DW_AT_start_scope:
581 case DW_AT_visibility:
582 default:
583 case DW_AT_sibling:
584 break;
585 }
586 }
587 }
588 }
589
590 // UniqueDWARFASTType is large, so don't create a local variables on the
591 // stack, put it on the heap. This function is often called recursively
592 // and clang isn't good and sharing the stack space for variables in
593 // different blocks.
594 std::unique_ptr<UniqueDWARFASTType> unique_ast_entry_ap(
595 new UniqueDWARFASTType());
596
597 ConstString unique_typename(type_name_const_str);
598 Declaration unique_decl(decl);
599
600 if (type_name_const_str) {
601 LanguageType die_language = die.GetLanguage();
602 if (Language::LanguageIsCPlusPlus(die_language)) {
603 // For C++, we rely solely upon the one definition rule that says
604 // only
605 // one thing can exist at a given decl context. We ignore the file
606 // and
607 // line that things are declared on.
608 std::string qualified_name;
609 if (die.GetQualifiedName(qualified_name))
610 unique_typename = ConstString(qualified_name);
611 unique_decl.Clear();
612 }
613
614 if (dwarf->GetUniqueDWARFASTTypeMap().Find(
615 unique_typename, die, unique_decl,
616 byte_size_valid ? byte_size : -1, *unique_ast_entry_ap)) {
617 type_sp = unique_ast_entry_ap->m_type_sp;
618 if (type_sp) {
619 dwarf->GetDIEToType()[die.GetDIE()] = type_sp.get();
620 return type_sp;
621 }
622 }
623 }
624
625 DEBUG_PRINTF("0x%8.8" PRIx64 ": %s (\"%s\")\n", die.GetID(),
626 DW_TAG_value_to_name(tag), type_name_cstr);
627
628 int tag_decl_kind = -1;
629 AccessType default_accessibility = eAccessNone;
630 if (tag == DW_TAG_structure_type) {
631 tag_decl_kind = clang::TTK_Struct;
632 default_accessibility = eAccessPublic;
633 } else if (tag == DW_TAG_union_type) {
634 tag_decl_kind = clang::TTK_Union;
635 default_accessibility = eAccessPublic;
636 } else if (tag == DW_TAG_class_type) {
637 tag_decl_kind = clang::TTK_Class;
638 default_accessibility = eAccessPrivate;
639 }
640
641 if (byte_size_valid && byte_size == 0 && type_name_cstr &&
642 die.HasChildren() == false &&
643 sc.comp_unit->GetLanguage() == eLanguageTypeObjC) {
644 // Work around an issue with clang at the moment where
645 // forward declarations for objective C classes are emitted
646 // as:
647 // DW_TAG_structure_type [2]
648 // DW_AT_name( "ForwardObjcClass" )
649 // DW_AT_byte_size( 0x00 )
650 // DW_AT_decl_file( "..." )
651 // DW_AT_decl_line( 1 )
652 //
653 // Note that there is no DW_AT_declaration and there are
654 // no children, and the byte size is zero.
655 is_forward_declaration = true;
656 }
657
658 if (class_language == eLanguageTypeObjC ||
659 class_language == eLanguageTypeObjC_plus_plus) {
660 if (!is_complete_objc_class &&
661 die.Supports_DW_AT_APPLE_objc_complete_type()) {
662 // We have a valid eSymbolTypeObjCClass class symbol whose
663 // name matches the current objective C class that we
664 // are trying to find and this DIE isn't the complete
665 // definition (we checked is_complete_objc_class above and
666 // know it is false), so the real definition is in here somewhere
667 type_sp = dwarf->FindCompleteObjCDefinitionTypeForDIE(
668 die, type_name_const_str, true);
669
670 if (!type_sp) {
671 SymbolFileDWARFDebugMap *debug_map_symfile =
672 dwarf->GetDebugMapSymfile();
673 if (debug_map_symfile) {
674 // We weren't able to find a full declaration in
675 // this DWARF, see if we have a declaration anywhere
676 // else...
677 type_sp =
678 debug_map_symfile->FindCompleteObjCDefinitionTypeForDIE(
679 die, type_name_const_str, true);
680 }
681 }
682
683 if (type_sp) {
684 if (log) {
685 dwarf->GetObjectFile()->GetModule()->LogMessage(
686 log, "SymbolFileDWARF(%p) - 0x%8.8x: %s type \"%s\" is an "
687 "incomplete objc type, complete type is 0x%8.8" PRIx64"l" "x",
688 static_cast<void *>(this), die.GetOffset(),
689 DW_TAG_value_to_name(tag), type_name_cstr,
690 type_sp->GetID());
691 }
692
693 // We found a real definition for this type elsewhere
694 // so lets use it and cache the fact that we found
695 // a complete type for this die
696 dwarf->GetDIEToType()[die.GetDIE()] = type_sp.get();
697 return type_sp;
698 }
699 }
700 }
701
702 if (is_forward_declaration) {
703 // We have a forward declaration to a type and we need
704 // to try and find a full declaration. We look in the
705 // current type index just in case we have a forward
706 // declaration followed by an actual declarations in the
707 // DWARF. If this fails, we need to look elsewhere...
708 if (log) {
709 dwarf->GetObjectFile()->GetModule()->LogMessage(
710 log, "SymbolFileDWARF(%p) - 0x%8.8x: %s type \"%s\" is a "
711 "forward declaration, trying to find complete type",
712 static_cast<void *>(this), die.GetOffset(),
713 DW_TAG_value_to_name(tag), type_name_cstr);
714 }
715
716 // See if the type comes from a DWO module and if so, track down that
717 // type.
718 type_sp = ParseTypeFromDWO(die, log);
719 if (type_sp)
720 return type_sp;
721
722 DWARFDeclContext die_decl_ctx;
723 die.GetDWARFDeclContext(die_decl_ctx);
724
725 // type_sp = FindDefinitionTypeForDIE (dwarf_cu, die,
726 // type_name_const_str);
727 type_sp = dwarf->FindDefinitionTypeForDWARFDeclContext(die_decl_ctx);
728
729 if (!type_sp) {
730 SymbolFileDWARFDebugMap *debug_map_symfile =
731 dwarf->GetDebugMapSymfile();
732 if (debug_map_symfile) {
733 // We weren't able to find a full declaration in
734 // this DWARF, see if we have a declaration anywhere
735 // else...
736 type_sp =
737 debug_map_symfile->FindDefinitionTypeForDWARFDeclContext(
738 die_decl_ctx);
739 }
740 }
741
742 if (type_sp) {
743 if (log) {
744 dwarf->GetObjectFile()->GetModule()->LogMessage(
745 log, "SymbolFileDWARF(%p) - 0x%8.8x: %s type \"%s\" is a "
746 "forward declaration, complete type is 0x%8.8" PRIx64"l" "x",
747 static_cast<void *>(this), die.GetOffset(),
748 DW_TAG_value_to_name(tag), type_name_cstr, type_sp->GetID());
749 }
750
751 // We found a real definition for this type elsewhere
752 // so lets use it and cache the fact that we found
753 // a complete type for this die
754 dwarf->GetDIEToType()[die.GetDIE()] = type_sp.get();
755 clang::DeclContext *defn_decl_ctx = GetCachedClangDeclContextForDIE(
756 dwarf->DebugInfo()->GetDIE(DIERef(type_sp->GetID(), dwarf)));
757 if (defn_decl_ctx)
758 LinkDeclContextToDIE(defn_decl_ctx, die);
759 return type_sp;
760 }
761 }
762 assert(tag_decl_kind != -1)((tag_decl_kind != -1) ? static_cast<void> (0) : __assert_fail
("tag_decl_kind != -1", "/tmp/buildd/llvm-toolchain-snapshot-5.0~svn298304/tools/lldb/source/Plugins/SymbolFile/DWARF/DWARFASTParserClang.cpp"
, 762, __PRETTY_FUNCTION__))
;
763 bool clang_type_was_created = false;
764 clang_type.SetCompilerType(
765 &m_ast, dwarf->GetForwardDeclDieToClangType().lookup(die.GetDIE()));
766 if (!clang_type) {
767 clang::DeclContext *decl_ctx =
768 GetClangDeclContextContainingDIE(die, nullptr);
769 if (accessibility == eAccessNone && decl_ctx) {
770 // Check the decl context that contains this class/struct/union.
771 // If it is a class we must give it an accessibility.
772 const clang::Decl::Kind containing_decl_kind =
773 decl_ctx->getDeclKind();
774 if (DeclKindIsCXXClass(containing_decl_kind))
775 accessibility = default_accessibility;
776 }
777
778 ClangASTMetadata metadata;
779 metadata.SetUserID(die.GetID());
780 metadata.SetIsDynamicCXXType(dwarf->ClassOrStructIsVirtual(die));
781
782 if (type_name_cstr && strchr(type_name_cstr, '<')) {
783 ClangASTContext::TemplateParameterInfos template_param_infos;
784 if (ParseTemplateParameterInfos(die, template_param_infos)) {
785 clang::ClassTemplateDecl *class_template_decl =
786 m_ast.ParseClassTemplateDecl(decl_ctx, accessibility,
787 type_name_cstr, tag_decl_kind,
788 template_param_infos);
789
790 clang::ClassTemplateSpecializationDecl
791 *class_specialization_decl =
792 m_ast.CreateClassTemplateSpecializationDecl(
793 decl_ctx, class_template_decl, tag_decl_kind,
794 template_param_infos);
795 clang_type = m_ast.CreateClassTemplateSpecializationType(
796 class_specialization_decl);
797 clang_type_was_created = true;
798
799 m_ast.SetMetadata(class_template_decl, metadata);
800 m_ast.SetMetadata(class_specialization_decl, metadata);
801 }
802 }
803
804 if (!clang_type_was_created) {
805 clang_type_was_created = true;
806 clang_type = m_ast.CreateRecordType(decl_ctx, accessibility,
807 type_name_cstr, tag_decl_kind,
808 class_language, &metadata);
809 }
810 }
811
812 // Store a forward declaration to this class type in case any
813 // parameters in any class methods need it for the clang
814 // types for function prototypes.
815 LinkDeclContextToDIE(m_ast.GetDeclContextForType(clang_type), die);
816 type_sp.reset(new Type(die.GetID(), dwarf, type_name_const_str,
817 byte_size, NULL__null, LLDB_INVALID_UID(18446744073709551615UL),
818 Type::eEncodingIsUID, &decl, clang_type,
819 Type::eResolveStateForward));
820
821 type_sp->SetIsCompleteObjCClass(is_complete_objc_class);
822
823 // Add our type to the unique type map so we don't
824 // end up creating many copies of the same type over
825 // and over in the ASTContext for our module
826 unique_ast_entry_ap->m_type_sp = type_sp;
827 unique_ast_entry_ap->m_die = die;
828 unique_ast_entry_ap->m_declaration = unique_decl;
829 unique_ast_entry_ap->m_byte_size = byte_size;
830 dwarf->GetUniqueDWARFASTTypeMap().Insert(unique_typename,
831 *unique_ast_entry_ap);
832
833 if (is_forward_declaration && die.HasChildren()) {
834 // Check to see if the DIE actually has a definition, some version of
835 // GCC will
836 // emit DIEs with DW_AT_declaration set to true, but yet still have
837 // subprogram,
838 // members, or inheritance, so we can't trust it
839 DWARFDIE child_die = die.GetFirstChild();
840 while (child_die) {
841 switch (child_die.Tag()) {
842 case DW_TAG_inheritance:
843 case DW_TAG_subprogram:
844 case DW_TAG_member:
845 case DW_TAG_APPLE_property:
846 case DW_TAG_class_type:
847 case DW_TAG_structure_type:
848 case DW_TAG_enumeration_type:
849 case DW_TAG_typedef:
850 case DW_TAG_union_type:
851 child_die.Clear();
852 is_forward_declaration = false;
853 break;
854 default:
855 child_die = child_die.GetSibling();
856 break;
857 }
858 }
859 }
860
861 if (!is_forward_declaration) {
862 // Always start the definition for a class type so that
863 // if the class has child classes or types that require
864 // the class to be created for use as their decl contexts
865 // the class will be ready to accept these child definitions.
866 if (die.HasChildren() == false) {
867 // No children for this struct/union/class, lets finish it
868 if (ClangASTContext::StartTagDeclarationDefinition(clang_type)) {
869 ClangASTContext::CompleteTagDeclarationDefinition(clang_type);
870 } else {
871 dwarf->GetObjectFile()->GetModule()->ReportError(
872 "DWARF DIE at 0x%8.8x named \"%s\" was not able to start its "
873 "definition.\nPlease file a bug and attach the file at the "
874 "start of this error message",
875 die.GetOffset(), type_name_cstr);
876 }
877
878 if (tag == DW_TAG_structure_type) // this only applies in C
879 {
880 clang::RecordDecl *record_decl =
881 ClangASTContext::GetAsRecordDecl(clang_type);
882
883 if (record_decl) {
884 GetClangASTImporter().InsertRecordDecl(
885 record_decl, ClangASTImporter::LayoutInfo());
886 }
887 }
888 } else if (clang_type_was_created) {
889 // Start the definition if the class is not objective C since
890 // the underlying decls respond to isCompleteDefinition(). Objective
891 // C decls don't respond to isCompleteDefinition() so we can't
892 // start the declaration definition right away. For C++
893 // class/union/structs
894 // we want to start the definition in case the class is needed as
895 // the
896 // declaration context for a contained class or type without the
897 // need
898 // to complete that type..
899
900 if (class_language != eLanguageTypeObjC &&
901 class_language != eLanguageTypeObjC_plus_plus)
902 ClangASTContext::StartTagDeclarationDefinition(clang_type);
903
904 // Leave this as a forward declaration until we need
905 // to know the details of the type. lldb_private::Type
906 // will automatically call the SymbolFile virtual function
907 // "SymbolFileDWARF::CompleteType(Type *)"
908 // When the definition needs to be defined.
909 assert(!dwarf->GetForwardDeclClangTypeToDie().count(((!dwarf->GetForwardDeclClangTypeToDie().count( ClangUtil::
RemoveFastQualifiers(clang_type) .GetOpaqueQualType()) &&
"Type already in the forward declaration map!") ? static_cast
<void> (0) : __assert_fail ("!dwarf->GetForwardDeclClangTypeToDie().count( ClangUtil::RemoveFastQualifiers(clang_type) .GetOpaqueQualType()) && \"Type already in the forward declaration map!\""
, "/tmp/buildd/llvm-toolchain-snapshot-5.0~svn298304/tools/lldb/source/Plugins/SymbolFile/DWARF/DWARFASTParserClang.cpp"
, 912, __PRETTY_FUNCTION__))
910 ClangUtil::RemoveFastQualifiers(clang_type)((!dwarf->GetForwardDeclClangTypeToDie().count( ClangUtil::
RemoveFastQualifiers(clang_type) .GetOpaqueQualType()) &&
"Type already in the forward declaration map!") ? static_cast
<void> (0) : __assert_fail ("!dwarf->GetForwardDeclClangTypeToDie().count( ClangUtil::RemoveFastQualifiers(clang_type) .GetOpaqueQualType()) && \"Type already in the forward declaration map!\""
, "/tmp/buildd/llvm-toolchain-snapshot-5.0~svn298304/tools/lldb/source/Plugins/SymbolFile/DWARF/DWARFASTParserClang.cpp"
, 912, __PRETTY_FUNCTION__))
911 .GetOpaqueQualType()) &&((!dwarf->GetForwardDeclClangTypeToDie().count( ClangUtil::
RemoveFastQualifiers(clang_type) .GetOpaqueQualType()) &&
"Type already in the forward declaration map!") ? static_cast
<void> (0) : __assert_fail ("!dwarf->GetForwardDeclClangTypeToDie().count( ClangUtil::RemoveFastQualifiers(clang_type) .GetOpaqueQualType()) && \"Type already in the forward declaration map!\""
, "/tmp/buildd/llvm-toolchain-snapshot-5.0~svn298304/tools/lldb/source/Plugins/SymbolFile/DWARF/DWARFASTParserClang.cpp"
, 912, __PRETTY_FUNCTION__))
912 "Type already in the forward declaration map!")((!dwarf->GetForwardDeclClangTypeToDie().count( ClangUtil::
RemoveFastQualifiers(clang_type) .GetOpaqueQualType()) &&
"Type already in the forward declaration map!") ? static_cast
<void> (0) : __assert_fail ("!dwarf->GetForwardDeclClangTypeToDie().count( ClangUtil::RemoveFastQualifiers(clang_type) .GetOpaqueQualType()) && \"Type already in the forward declaration map!\""
, "/tmp/buildd/llvm-toolchain-snapshot-5.0~svn298304/tools/lldb/source/Plugins/SymbolFile/DWARF/DWARFASTParserClang.cpp"
, 912, __PRETTY_FUNCTION__))
;
913 // Can't assume m_ast.GetSymbolFile() is actually a SymbolFileDWARF,
914 // it can be a
915 // SymbolFileDWARFDebugMap for Apple binaries.
916 dwarf->GetForwardDeclDieToClangType()[die.GetDIE()] =
917 clang_type.GetOpaqueQualType();
918 dwarf->GetForwardDeclClangTypeToDie()
919 [ClangUtil::RemoveFastQualifiers(clang_type)
920 .GetOpaqueQualType()] = die.GetDIERef();
921 m_ast.SetHasExternalStorage(clang_type.GetOpaqueQualType(), true);
922 }
923 }
924 } break;
925
926 case DW_TAG_enumeration_type: {
927 // Set a bit that lets us know that we are currently parsing this
928 dwarf->GetDIEToType()[die.GetDIE()] = DIE_IS_BEING_PARSED((lldb_private::Type *)1);
929
930 DWARFFormValue encoding_form;
931
932 const size_t num_attributes = die.GetAttributes(attributes);
933 if (num_attributes > 0) {
934 uint32_t i;
935
936 for (i = 0; i < num_attributes; ++i) {
937 attr = attributes.AttributeAtIndex(i);
938 if (attributes.ExtractFormValueAtIndex(i, form_value)) {
939 switch (attr) {
940 case DW_AT_decl_file:
941 decl.SetFile(sc.comp_unit->GetSupportFiles().GetFileSpecAtIndex(
942 form_value.Unsigned()));
943 break;
944 case DW_AT_decl_line:
945 decl.SetLine(form_value.Unsigned());
946 break;
947 case DW_AT_decl_column:
948 decl.SetColumn(form_value.Unsigned());
949 break;
950 case DW_AT_name:
951 type_name_cstr = form_value.AsCString();
952 type_name_const_str.SetCString(type_name_cstr);
953 break;
954 case DW_AT_type:
955 encoding_form = form_value;
956 break;
957 case DW_AT_byte_size:
958 byte_size = form_value.Unsigned();
959 break;
960 case DW_AT_accessibility:
961 break; // accessibility =
962 // DW_ACCESS_to_AccessType(form_value.Unsigned()); break;
963 case DW_AT_declaration:
964 is_forward_declaration = form_value.Boolean();
965 break;
966 case DW_AT_allocated:
967 case DW_AT_associated:
968 case DW_AT_bit_stride:
969 case DW_AT_byte_stride:
970 case DW_AT_data_location:
971 case DW_AT_description:
972 case DW_AT_start_scope:
973 case DW_AT_visibility:
974 case DW_AT_specification:
975 case DW_AT_abstract_origin:
976 case DW_AT_sibling:
977 break;
978 }
979 }
980 }
981
982 if (is_forward_declaration) {
983 type_sp = ParseTypeFromDWO(die, log);
984 if (type_sp)
985 return type_sp;
986
987 DWARFDeclContext die_decl_ctx;
988 die.GetDWARFDeclContext(die_decl_ctx);
989
990 type_sp =
991 dwarf->FindDefinitionTypeForDWARFDeclContext(die_decl_ctx);
992
993 if (!type_sp) {
994 SymbolFileDWARFDebugMap *debug_map_symfile =
995 dwarf->GetDebugMapSymfile();
996 if (debug_map_symfile) {
997 // We weren't able to find a full declaration in
998 // this DWARF, see if we have a declaration anywhere
999 // else...
1000 type_sp =
1001 debug_map_symfile->FindDefinitionTypeForDWARFDeclContext(
1002 die_decl_ctx);
1003 }
1004 }
1005
1006 if (type_sp) {
1007 if (log) {
1008 dwarf->GetObjectFile()->GetModule()->LogMessage(
1009 log, "SymbolFileDWARF(%p) - 0x%8.8x: %s type \"%s\" is a "
1010 "forward declaration, complete type is 0x%8.8" PRIx64"l" "x",
1011 static_cast<void *>(this), die.GetOffset(),
1012 DW_TAG_value_to_name(tag), type_name_cstr,
1013 type_sp->GetID());
1014 }
1015
1016 // We found a real definition for this type elsewhere
1017 // so lets use it and cache the fact that we found
1018 // a complete type for this die
1019 dwarf->GetDIEToType()[die.GetDIE()] = type_sp.get();
1020 clang::DeclContext *defn_decl_ctx =
1021 GetCachedClangDeclContextForDIE(dwarf->DebugInfo()->GetDIE(
1022 DIERef(type_sp->GetID(), dwarf)));
1023 if (defn_decl_ctx)
1024 LinkDeclContextToDIE(defn_decl_ctx, die);
1025 return type_sp;
1026 }
1027 }
1028 DEBUG_PRINTF("0x%8.8" PRIx64 ": %s (\"%s\")\n", die.GetID(),
1029 DW_TAG_value_to_name(tag), type_name_cstr);
1030
1031 CompilerType enumerator_clang_type;
1032 clang_type.SetCompilerType(
1033 &m_ast,
1034 dwarf->GetForwardDeclDieToClangType().lookup(die.GetDIE()));
1035 if (!clang_type) {
1036 if (encoding_form.IsValid()) {
1037 Type *enumerator_type =
1038 dwarf->ResolveTypeUID(DIERef(encoding_form));
1039 if (enumerator_type)
1040 enumerator_clang_type = enumerator_type->GetFullCompilerType();
1041 }
1042
1043 if (!enumerator_clang_type) {
1044 if (byte_size > 0) {
1045 enumerator_clang_type =
1046 m_ast.GetBuiltinTypeForDWARFEncodingAndBitSize(
1047 NULL__null, DW_ATE_signed, byte_size * 8);
1048 } else {
1049 enumerator_clang_type = m_ast.GetBasicType(eBasicTypeInt);
1050 }
1051 }
1052
1053 clang_type = m_ast.CreateEnumerationType(
1054 type_name_cstr, GetClangDeclContextContainingDIE(die, nullptr),
1055 decl, enumerator_clang_type);
1056 } else {
1057 enumerator_clang_type =
1058 m_ast.GetEnumerationIntegerType(clang_type.GetOpaqueQualType());
1059 }
1060
1061 LinkDeclContextToDIE(
1062 ClangASTContext::GetDeclContextForType(clang_type), die);
1063
1064 type_sp.reset(new Type(
1065 die.GetID(), dwarf, type_name_const_str, byte_size, NULL__null,
1066 DIERef(encoding_form).GetUID(dwarf), Type::eEncodingIsUID, &decl,
1067 clang_type, Type::eResolveStateForward));
1068
1069 if (ClangASTContext::StartTagDeclarationDefinition(clang_type)) {
1070 if (die.HasChildren()) {
1071 SymbolContext cu_sc(die.GetLLDBCompileUnit());
1072 bool is_signed = false;
1073 enumerator_clang_type.IsIntegerType(is_signed);
1074 ParseChildEnumerators(cu_sc, clang_type, is_signed,
1075 type_sp->GetByteSize(), die);
1076 }
1077 ClangASTContext::CompleteTagDeclarationDefinition(clang_type);
1078 } else {
1079 dwarf->GetObjectFile()->GetModule()->ReportError(
1080 "DWARF DIE at 0x%8.8x named \"%s\" was not able to start its "
1081 "definition.\nPlease file a bug and attach the file at the "
1082 "start of this error message",
1083 die.GetOffset(), type_name_cstr);
1084 }
1085 }
1086 } break;
1087
1088 case DW_TAG_inlined_subroutine:
1089 case DW_TAG_subprogram:
1090 case DW_TAG_subroutine_type: {
1091 // Set a bit that lets us know that we are currently parsing this
1092 dwarf->GetDIEToType()[die.GetDIE()] = DIE_IS_BEING_PARSED((lldb_private::Type *)1);
1093
1094 DWARFFormValue type_die_form;
1095 bool is_variadic = false;
1096 bool is_inline = false;
1097 bool is_static = false;
1098 bool is_virtual = false;
1099 bool is_explicit = false;
1100 bool is_artificial = false;
1101 bool has_template_params = false;
1102 DWARFFormValue specification_die_form;
1103 DWARFFormValue abstract_origin_die_form;
1104 dw_offset_t object_pointer_die_offset = DW_INVALID_OFFSET(~(dw_offset_t)0);
1105
1106 unsigned type_quals = 0;
1107 clang::StorageClass storage =
1108 clang::SC_None; //, Extern, Static, PrivateExtern
1109
1110 const size_t num_attributes = die.GetAttributes(attributes);
1111 if (num_attributes > 0) {
1112 uint32_t i;
1113 for (i = 0; i < num_attributes; ++i) {
1114 attr = attributes.AttributeAtIndex(i);
1115 if (attributes.ExtractFormValueAtIndex(i, form_value)) {
1116 switch (attr) {
1117 case DW_AT_decl_file:
1118 decl.SetFile(sc.comp_unit->GetSupportFiles().GetFileSpecAtIndex(
1119 form_value.Unsigned()));
1120 break;
1121 case DW_AT_decl_line:
1122 decl.SetLine(form_value.Unsigned());
1123 break;
1124 case DW_AT_decl_column:
1125 decl.SetColumn(form_value.Unsigned());
1126 break;
1127 case DW_AT_name:
1128 type_name_cstr = form_value.AsCString();
1129 type_name_const_str.SetCString(type_name_cstr);
1130 break;
1131
1132 case DW_AT_linkage_name:
1133 case DW_AT_MIPS_linkage_name:
1134 break; // mangled =
1135 // form_value.AsCString(&dwarf->get_debug_str_data());
1136 // break;
1137 case DW_AT_type:
1138 type_die_form = form_value;
1139 break;
1140 case DW_AT_accessibility:
1141 accessibility = DW_ACCESS_to_AccessType(form_value.Unsigned());
1142 break;
1143 case DW_AT_declaration:
1144 break; // is_forward_declaration = form_value.Boolean(); break;
1145 case DW_AT_inline:
1146 is_inline = form_value.Boolean();
1147 break;
1148 case DW_AT_virtuality:
1149 is_virtual = form_value.Boolean();
1150 break;
1151 case DW_AT_explicit:
1152 is_explicit = form_value.Boolean();
1153 break;
1154 case DW_AT_artificial:
1155 is_artificial = form_value.Boolean();
1156 break;
1157
1158 case DW_AT_external:
1159 if (form_value.Unsigned()) {
1160 if (storage == clang::SC_None)
1161 storage = clang::SC_Extern;
1162 else
1163 storage = clang::SC_PrivateExtern;
1164 }
1165 break;
1166
1167 case DW_AT_specification:
1168 specification_die_form = form_value;
1169 break;
1170
1171 case DW_AT_abstract_origin:
1172 abstract_origin_die_form = form_value;
1173 break;
1174
1175 case DW_AT_object_pointer:
1176 object_pointer_die_offset = form_value.Reference();
1177 break;
1178
1179 case DW_AT_allocated:
1180 case DW_AT_associated:
1181 case DW_AT_address_class:
1182 case DW_AT_calling_convention:
1183 case DW_AT_data_location:
1184 case DW_AT_elemental:
1185 case DW_AT_entry_pc:
1186 case DW_AT_frame_base:
1187 case DW_AT_high_pc:
1188 case DW_AT_low_pc:
1189 case DW_AT_prototyped:
1190 case DW_AT_pure:
1191 case DW_AT_ranges:
1192 case DW_AT_recursive:
1193 case DW_AT_return_addr:
1194 case DW_AT_segment:
1195 case DW_AT_start_scope:
1196 case DW_AT_static_link:
1197 case DW_AT_trampoline:
1198 case DW_AT_visibility:
1199 case DW_AT_vtable_elem_location:
1200 case DW_AT_description:
1201 case DW_AT_sibling:
1202 break;
1203 }
1204 }
1205 }
1206 }
1207
1208 std::string object_pointer_name;
1209 if (object_pointer_die_offset != DW_INVALID_OFFSET(~(dw_offset_t)0)) {
1210 DWARFDIE object_pointer_die = die.GetDIE(object_pointer_die_offset);
1211 if (object_pointer_die) {
1212 const char *object_pointer_name_cstr = object_pointer_die.GetName();
1213 if (object_pointer_name_cstr)
1214 object_pointer_name = object_pointer_name_cstr;
1215 }
1216 }
1217
1218 DEBUG_PRINTF("0x%8.8" PRIx64 ": %s (\"%s\")\n", die.GetID(),
1219 DW_TAG_value_to_name(tag), type_name_cstr);
1220
1221 CompilerType return_clang_type;
1222 Type *func_type = NULL__null;
1223
1224 if (type_die_form.IsValid())
1225 func_type = dwarf->ResolveTypeUID(DIERef(type_die_form));
1226
1227 if (func_type)
1228 return_clang_type = func_type->GetForwardCompilerType();
1229 else
1230 return_clang_type = m_ast.GetBasicType(eBasicTypeVoid);
1231
1232 std::vector<CompilerType> function_param_types;
1233 std::vector<clang::ParmVarDecl *> function_param_decls;
1234
1235 // Parse the function children for the parameters
1236
1237 DWARFDIE decl_ctx_die;
1238 clang::DeclContext *containing_decl_ctx =
1239 GetClangDeclContextContainingDIE(die, &decl_ctx_die);
1240 const clang::Decl::Kind containing_decl_kind =
1241 containing_decl_ctx->getDeclKind();
1242
1243 bool is_cxx_method = DeclKindIsCXXClass(containing_decl_kind);
1244 // Start off static. This will be set to false in
1245 // ParseChildParameters(...)
1246 // if we find a "this" parameters as the first parameter
1247 if (is_cxx_method) {
1248 is_static = true;
1249 }
1250
1251 if (die.HasChildren()) {
1252 bool skip_artificial = true;
1253 ParseChildParameters(sc, containing_decl_ctx, die, skip_artificial,
1254 is_static, is_variadic, has_template_params,
1255 function_param_types, function_param_decls,
1256 type_quals);
1257 }
1258
1259 bool ignore_containing_context = false;
1260 // Check for templatized class member functions. If we had any
1261 // DW_TAG_template_type_parameter
1262 // or DW_TAG_template_value_parameter the DW_TAG_subprogram DIE, then we
1263 // can't let this become
1264 // a method in a class. Why? Because templatized functions are only
1265 // emitted if one of the
1266 // templatized methods is used in the current compile unit and we will
1267 // end up with classes
1268 // that may or may not include these member functions and this means one
1269 // class won't match another
1270 // class definition and it affects our ability to use a class in the
1271 // clang expression parser. So
1272 // for the greater good, we currently must not allow any template member
1273 // functions in a class definition.
1274 if (is_cxx_method && has_template_params) {
1275 ignore_containing_context = true;
1276 is_cxx_method = false;
1277 }
1278
1279 // clang_type will get the function prototype clang type after this call
1280 clang_type = m_ast.CreateFunctionType(
1281 return_clang_type, function_param_types.data(),
1282 function_param_types.size(), is_variadic, type_quals);
1283
1284 if (type_name_cstr) {
1285 bool type_handled = false;
1286 if (tag == DW_TAG_subprogram || tag == DW_TAG_inlined_subroutine) {
1287 ObjCLanguage::MethodName objc_method(type_name_cstr, true);
1288 if (objc_method.IsValid(true)) {
1289 CompilerType class_opaque_type;
1290 ConstString class_name(objc_method.GetClassName());
1291 if (class_name) {
1292 TypeSP complete_objc_class_type_sp(
1293 dwarf->FindCompleteObjCDefinitionTypeForDIE(
1294 DWARFDIE(), class_name, false));
1295
1296 if (complete_objc_class_type_sp) {
1297 CompilerType type_clang_forward_type =
1298 complete_objc_class_type_sp->GetForwardCompilerType();
1299 if (ClangASTContext::IsObjCObjectOrInterfaceType(
1300 type_clang_forward_type))
1301 class_opaque_type = type_clang_forward_type;
1302 }
1303 }
1304
1305 if (class_opaque_type) {
1306 // If accessibility isn't set to anything valid, assume public
1307 // for
1308 // now...
1309 if (accessibility == eAccessNone)
1310 accessibility = eAccessPublic;
1311
1312 clang::ObjCMethodDecl *objc_method_decl =
1313 m_ast.AddMethodToObjCObjectType(
1314 class_opaque_type, type_name_cstr, clang_type,
1315 accessibility, is_artificial, is_variadic);
1316 type_handled = objc_method_decl != NULL__null;
1317 if (type_handled) {
1318 LinkDeclContextToDIE(
1319 ClangASTContext::GetAsDeclContext(objc_method_decl), die);
1320 m_ast.SetMetadataAsUserID(objc_method_decl, die.GetID());
1321 } else {
1322 dwarf->GetObjectFile()->GetModule()->ReportError(
1323 "{0x%8.8x}: invalid Objective-C method 0x%4.4x (%s), "
1324 "please file a bug and attach the file at the start of "
1325 "this error message",
1326 die.GetOffset(), tag, DW_TAG_value_to_name(tag));
1327 }
1328 }
1329 } else if (is_cxx_method) {
1330 // Look at the parent of this DIE and see if is is
1331 // a class or struct and see if this is actually a
1332 // C++ method
1333 Type *class_type = dwarf->ResolveType(decl_ctx_die);
1334 if (class_type) {
1335 bool alternate_defn = false;
1336 if (class_type->GetID() != decl_ctx_die.GetID() ||
1337 decl_ctx_die.GetContainingDWOModuleDIE()) {
1338 alternate_defn = true;
1339
1340 // We uniqued the parent class of this function to another
1341 // class
1342 // so we now need to associate all dies under "decl_ctx_die"
1343 // to
1344 // DIEs in the DIE for "class_type"...
1345 SymbolFileDWARF *class_symfile = NULL__null;
1346 DWARFDIE class_type_die;
1347
1348 SymbolFileDWARFDebugMap *debug_map_symfile =
1349 dwarf->GetDebugMapSymfile();
1350 if (debug_map_symfile) {
1351 class_symfile = debug_map_symfile->GetSymbolFileByOSOIndex(
1352 SymbolFileDWARFDebugMap::GetOSOIndexFromUserID(
1353 class_type->GetID()));
1354 class_type_die = class_symfile->DebugInfo()->GetDIE(
1355 DIERef(class_type->GetID(), dwarf));
1356 } else {
1357 class_symfile = dwarf;
Value stored to 'class_symfile' is never read
1358 class_type_die = dwarf->DebugInfo()->GetDIE(
1359 DIERef(class_type->GetID(), dwarf));
1360 }
1361 if (class_type_die) {
1362 DWARFDIECollection failures;
1363
1364 CopyUniqueClassMethodTypes(decl_ctx_die, class_type_die,
1365 class_type, failures);
1366
1367 // FIXME do something with these failures that's smarter
1368 // than
1369 // just dropping them on the ground. Unfortunately classes
1370 // don't
1371 // like having stuff added to them after their definitions
1372 // are
1373 // complete...
1374
1375 type_ptr = dwarf->GetDIEToType()[die.GetDIE()];
1376 if (type_ptr && type_ptr != DIE_IS_BEING_PARSED((lldb_private::Type *)1)) {
1377 type_sp = type_ptr->shared_from_this();
1378 break;
1379 }
1380 }
1381 }
1382
1383 if (specification_die_form.IsValid()) {
1384 // We have a specification which we are going to base our
1385 // function
1386 // prototype off of, so we need this type to be completed so
1387 // that the
1388 // m_die_to_decl_ctx for the method in the specification has a
1389 // valid
1390 // clang decl context.
1391 class_type->GetForwardCompilerType();
1392 // If we have a specification, then the function type should
1393 // have been
1394 // made with the specification and not with this die.
1395 DWARFDIE spec_die = dwarf->DebugInfo()->GetDIE(
1396 DIERef(specification_die_form));
1397 clang::DeclContext *spec_clang_decl_ctx =
1398 GetClangDeclContextForDIE(spec_die);
1399 if (spec_clang_decl_ctx) {
1400 LinkDeclContextToDIE(spec_clang_decl_ctx, die);
1401 } else {
1402 dwarf->GetObjectFile()->GetModule()->ReportWarning(
1403 "0x%8.8" PRIx64"l" "x" ": DW_AT_specification(0x%8.8" PRIx64"l" "x"
1404 ") has no decl\n",
1405 die.GetID(), specification_die_form.Reference());
1406 }
1407 type_handled = true;
1408 } else if (abstract_origin_die_form.IsValid()) {
1409 // We have a specification which we are going to base our
1410 // function
1411 // prototype off of, so we need this type to be completed so
1412 // that the
1413 // m_die_to_decl_ctx for the method in the abstract origin has
1414 // a valid
1415 // clang decl context.
1416 class_type->GetForwardCompilerType();
1417
1418 DWARFDIE abs_die = dwarf->DebugInfo()->GetDIE(
1419 DIERef(abstract_origin_die_form));
1420 clang::DeclContext *abs_clang_decl_ctx =
1421 GetClangDeclContextForDIE(abs_die);
1422 if (abs_clang_decl_ctx) {
1423 LinkDeclContextToDIE(abs_clang_decl_ctx, die);
1424 } else {
1425 dwarf->GetObjectFile()->GetModule()->ReportWarning(
1426 "0x%8.8" PRIx64"l" "x" ": DW_AT_abstract_origin(0x%8.8" PRIx64"l" "x"
1427 ") has no decl\n",
1428 die.GetID(), abstract_origin_die_form.Reference());
1429 }
1430 type_handled = true;
1431 } else {
1432 CompilerType class_opaque_type =
1433 class_type->GetForwardCompilerType();
1434 if (ClangASTContext::IsCXXClassType(class_opaque_type)) {
1435 if (class_opaque_type.IsBeingDefined() || alternate_defn) {
1436 if (!is_static && !die.HasChildren()) {
1437 // We have a C++ member function with no children (this
1438 // pointer!)
1439 // and clang will get mad if we try and make a function
1440 // that isn't
1441 // well formed in the DWARF, so we will just skip it...
1442 type_handled = true;
1443 } else {
1444 bool add_method = true;
1445 if (alternate_defn) {
1446 // If an alternate definition for the class exists,
1447 // then add the method only if an
1448 // equivalent is not already present.
1449 clang::CXXRecordDecl *record_decl =
1450 m_ast.GetAsCXXRecordDecl(
1451 class_opaque_type.GetOpaqueQualType());
1452 if (record_decl) {
1453 for (auto method_iter = record_decl->method_begin();
1454 method_iter != record_decl->method_end();
1455 method_iter++) {
1456 clang::CXXMethodDecl *method_decl = *method_iter;
1457 if (method_decl->getNameInfo().getAsString() ==
1458 std::string(type_name_cstr)) {
1459 if (method_decl->getType() ==
1460 ClangUtil::GetQualType(clang_type)) {
1461 add_method = false;
1462 LinkDeclContextToDIE(
1463 ClangASTContext::GetAsDeclContext(
1464 method_decl),
1465 die);
1466 type_handled = true;
1467
1468 break;
1469 }
1470 }
1471 }
1472 }
1473 }
1474
1475 if (add_method) {
1476 llvm::PrettyStackTraceFormat stack_trace(
1477 "SymbolFileDWARF::ParseType() is adding a method "
1478 "%s to class %s in DIE 0x%8.8" PRIx64"l" "x" " from %s",
1479 type_name_cstr,
1480 class_type->GetName().GetCString(), die.GetID(),
1481 dwarf->GetObjectFile()
1482 ->GetFileSpec()
1483 .GetPath()
1484 .c_str());
1485
1486 const bool is_attr_used = false;
1487 // Neither GCC 4.2 nor clang++ currently set a valid
1488 // accessibility
1489 // in the DWARF for C++ methods... Default to public
1490 // for now...
1491 if (accessibility == eAccessNone)
1492 accessibility = eAccessPublic;
1493
1494 clang::CXXMethodDecl *cxx_method_decl =
1495 m_ast.AddMethodToCXXRecordType(
1496 class_opaque_type.GetOpaqueQualType(),
1497 type_name_cstr, clang_type, accessibility,
1498 is_virtual, is_static, is_inline, is_explicit,
1499 is_attr_used, is_artificial);
1500
1501 type_handled = cxx_method_decl != NULL__null;
1502
1503 if (type_handled) {
1504 LinkDeclContextToDIE(
1505 ClangASTContext::GetAsDeclContext(
1506 cxx_method_decl),
1507 die);
1508
1509 ClangASTMetadata metadata;
1510 metadata.SetUserID(die.GetID());
1511
1512 if (!object_pointer_name.empty()) {
1513 metadata.SetObjectPtrName(
1514 object_pointer_name.c_str());
1515 if (log)
1516 log->Printf(
1517 "Setting object pointer name: %s on method "
1518 "object %p.\n",
1519 object_pointer_name.c_str(),
1520 static_cast<void *>(cxx_method_decl));
1521 }
1522 m_ast.SetMetadata(cxx_method_decl, metadata);
1523 } else {
1524 ignore_containing_context = true;
1525 }
1526 }
1527 }
1528 } else {
1529 // We were asked to parse the type for a method in a
1530 // class, yet the
1531 // class hasn't been asked to complete itself through the
1532 // clang::ExternalASTSource protocol, so we need to just
1533 // have the
1534 // class complete itself and do things the right way, then
1535 // our
1536 // DIE should then have an entry in the
1537 // dwarf->GetDIEToType() map. First
1538 // we need to modify the dwarf->GetDIEToType() so it
1539 // doesn't think we are
1540 // trying to parse this DIE anymore...
1541 dwarf->GetDIEToType()[die.GetDIE()] = NULL__null;
1542
1543 // Now we get the full type to force our class type to
1544 // complete itself
1545 // using the clang::ExternalASTSource protocol which will
1546 // parse all
1547 // base classes and all methods (including the method for
1548 // this DIE).
1549 class_type->GetFullCompilerType();
1550
1551 // The type for this DIE should have been filled in the
1552 // function call above
1553 type_ptr = dwarf->GetDIEToType()[die.GetDIE()];
1554 if (type_ptr && type_ptr != DIE_IS_BEING_PARSED((lldb_private::Type *)1)) {
1555 type_sp = type_ptr->shared_from_this();
1556 break;
1557 }
1558
1559 // FIXME This is fixing some even uglier behavior but we
1560 // really need to
1561 // uniq the methods of each class as well as the class
1562 // itself.
1563 // <rdar://problem/11240464>
1564 type_handled = true;
1565 }
1566 }
1567 }
1568 }
1569 }
1570 }
1571
1572 if (!type_handled) {
1573 clang::FunctionDecl *function_decl = nullptr;
1574
1575 if (abstract_origin_die_form.IsValid()) {
1576 DWARFDIE abs_die =
1577 dwarf->DebugInfo()->GetDIE(DIERef(abstract_origin_die_form));
1578
1579 SymbolContext sc;
1580
1581 if (dwarf->ResolveType(abs_die)) {
1582 function_decl = llvm::dyn_cast_or_null<clang::FunctionDecl>(
1583 GetCachedClangDeclContextForDIE(abs_die));
1584
1585 if (function_decl) {
1586 LinkDeclContextToDIE(function_decl, die);
1587 }
1588 }
1589 }
1590
1591 if (!function_decl) {
1592 // We just have a function that isn't part of a class
1593 function_decl = m_ast.CreateFunctionDeclaration(
1594 ignore_containing_context ? m_ast.GetTranslationUnitDecl()
1595 : containing_decl_ctx,
1596 type_name_cstr, clang_type, storage, is_inline);
1597
1598 // if (template_param_infos.GetSize() >
1599 // 0)
1600 // {
1601 // clang::FunctionTemplateDecl
1602 // *func_template_decl =
1603 // CreateFunctionTemplateDecl
1604 // (containing_decl_ctx,
1605 // function_decl,
1606 // type_name_cstr,
1607 // template_param_infos);
1608 //
1609 // CreateFunctionTemplateSpecializationInfo
1610 // (function_decl,
1611 // func_template_decl,
1612 // template_param_infos);
1613 // }
1614 // Add the decl to our DIE to decl context map
1615
1616 lldbassert(function_decl)lldb_private::lldb_assert(function_decl, "function_decl", __FUNCTION__
, "/tmp/buildd/llvm-toolchain-snapshot-5.0~svn298304/tools/lldb/source/Plugins/SymbolFile/DWARF/DWARFASTParserClang.cpp"
, 1616)
;
1617
1618 if (function_decl) {
1619 LinkDeclContextToDIE(function_decl, die);
1620
1621 if (!function_param_decls.empty())
1622 m_ast.SetFunctionParameters(function_decl,
1623 &function_param_decls.front(),
1624 function_param_decls.size());
1625
1626 ClangASTMetadata metadata;
1627 metadata.SetUserID(die.GetID());
1628
1629 if (!object_pointer_name.empty()) {
1630 metadata.SetObjectPtrName(object_pointer_name.c_str());
1631 if (log)
1632 log->Printf("Setting object pointer name: %s on function "
1633 "object %p.",
1634 object_pointer_name.c_str(),
1635 static_cast<void *>(function_decl));
1636 }
1637 m_ast.SetMetadata(function_decl, metadata);
1638 }
1639 }
1640 }
1641 }
1642 type_sp.reset(new Type(die.GetID(), dwarf, type_name_const_str, 0, NULL__null,
1643 LLDB_INVALID_UID(18446744073709551615UL), Type::eEncodingIsUID, &decl,
1644 clang_type, Type::eResolveStateFull));
1645 assert(type_sp.get())((type_sp.get()) ? static_cast<void> (0) : __assert_fail
("type_sp.get()", "/tmp/buildd/llvm-toolchain-snapshot-5.0~svn298304/tools/lldb/source/Plugins/SymbolFile/DWARF/DWARFASTParserClang.cpp"
, 1645, __PRETTY_FUNCTION__))
;
1646 } break;
1647
1648 case DW_TAG_array_type: {
1649 // Set a bit that lets us know that we are currently parsing this
1650 dwarf->GetDIEToType()[die.GetDIE()] = DIE_IS_BEING_PARSED((lldb_private::Type *)1);
1651
1652 DWARFFormValue type_die_form;
1653 int64_t first_index = 0;
1654 uint32_t byte_stride = 0;
1655 uint32_t bit_stride = 0;
1656 bool is_vector = false;
1657 const size_t num_attributes = die.GetAttributes(attributes);
1658
1659 if (num_attributes > 0) {
1660 uint32_t i;
1661 for (i = 0; i < num_attributes; ++i) {
1662 attr = attributes.AttributeAtIndex(i);
1663 if (attributes.ExtractFormValueAtIndex(i, form_value)) {
1664 switch (attr) {
1665 case DW_AT_decl_file:
1666 decl.SetFile(sc.comp_unit->GetSupportFiles().GetFileSpecAtIndex(
1667 form_value.Unsigned()));
1668 break;
1669 case DW_AT_decl_line:
1670 decl.SetLine(form_value.Unsigned());
1671 break;
1672 case DW_AT_decl_column:
1673 decl.SetColumn(form_value.Unsigned());
1674 break;
1675 case DW_AT_name:
1676 type_name_cstr = form_value.AsCString();
1677 type_name_const_str.SetCString(type_name_cstr);
1678 break;
1679
1680 case DW_AT_type:
1681 type_die_form = form_value;
1682 break;
1683 case DW_AT_byte_size:
1684 break; // byte_size = form_value.Unsigned(); break;
1685 case DW_AT_byte_stride:
1686 byte_stride = form_value.Unsigned();
1687 break;
1688 case DW_AT_bit_stride:
1689 bit_stride = form_value.Unsigned();
1690 break;
1691 case DW_AT_GNU_vector:
1692 is_vector = form_value.Boolean();
1693 break;
1694 case DW_AT_accessibility:
1695 break; // accessibility =
1696 // DW_ACCESS_to_AccessType(form_value.Unsigned()); break;
1697 case DW_AT_declaration:
1698 break; // is_forward_declaration = form_value.Boolean(); break;
1699 case DW_AT_allocated:
1700 case DW_AT_associated:
1701 case DW_AT_data_location:
1702 case DW_AT_description:
1703 case DW_AT_ordering:
1704 case DW_AT_start_scope:
1705 case DW_AT_visibility:
1706 case DW_AT_specification:
1707 case DW_AT_abstract_origin:
1708 case DW_AT_sibling:
1709 break;
1710 }
1711 }
1712 }
1713
1714 DEBUG_PRINTF("0x%8.8" PRIx64 ": %s (\"%s\")\n", die.GetID(),
1715 DW_TAG_value_to_name(tag), type_name_cstr);
1716
1717 DIERef type_die_ref(type_die_form);
1718 Type *element_type = dwarf->ResolveTypeUID(type_die_ref);
1719
1720 if (element_type) {
1721 std::vector<uint64_t> element_orders;
1722 ParseChildArrayInfo(sc, die, first_index, element_orders,
1723 byte_stride, bit_stride);
1724 if (byte_stride == 0 && bit_stride == 0)
1725 byte_stride = element_type->GetByteSize();
1726 CompilerType array_element_type =
1727 element_type->GetForwardCompilerType();
1728
1729 if (ClangASTContext::IsCXXClassType(array_element_type) &&
1730 array_element_type.GetCompleteType() == false) {
1731 ModuleSP module_sp = die.GetModule();
1732 if (module_sp) {
1733 if (die.GetCU()->GetProducer() ==
1734 DWARFCompileUnit::eProducerClang)
1735 module_sp->ReportError(
1736 "DWARF DW_TAG_array_type DIE at 0x%8.8x has a "
1737 "class/union/struct element type DIE 0x%8.8x that is a "
1738 "forward declaration, not a complete definition.\nTry "
1739 "compiling the source file with -fno-limit-debug-info or "
1740 "disable -gmodule",
1741 die.GetOffset(), type_die_ref.die_offset);
1742 else
1743 module_sp->ReportError(
1744 "DWARF DW_TAG_array_type DIE at 0x%8.8x has a "
1745 "class/union/struct element type DIE 0x%8.8x that is a "
1746 "forward declaration, not a complete definition.\nPlease "
1747 "file a bug against the compiler and include the "
1748 "preprocessed output for %s",
1749 die.GetOffset(), type_die_ref.die_offset,
1750 die.GetLLDBCompileUnit()
1751 ? die.GetLLDBCompileUnit()->GetPath().c_str()
1752 : "the source file");
1753 }
1754
1755 // We have no choice other than to pretend that the element class
1756 // type
1757 // is complete. If we don't do this, clang will crash when trying
1758 // to layout the class. Since we provide layout assistance, all
1759 // ivars in this class and other classes will be fine, this is
1760 // the best we can do short of crashing.
1761 if (ClangASTContext::StartTagDeclarationDefinition(
1762 array_element_type)) {
1763 ClangASTContext::CompleteTagDeclarationDefinition(
1764 array_element_type);
1765 } else {
1766 module_sp->ReportError("DWARF DIE at 0x%8.8x was not able to "
1767 "start its definition.\nPlease file a "
1768 "bug and attach the file at the start "
1769 "of this error message",
1770 type_die_ref.die_offset);
1771 }
1772 }
1773
1774 uint64_t array_element_bit_stride = byte_stride * 8 + bit_stride;
1775 if (element_orders.size() > 0) {
1776 uint64_t num_elements = 0;
1777 std::vector<uint64_t>::const_reverse_iterator pos;
1778 std::vector<uint64_t>::const_reverse_iterator end =
1779 element_orders.rend();
1780 for (pos = element_orders.rbegin(); pos != end; ++pos) {
1781 num_elements = *pos;
1782 clang_type = m_ast.CreateArrayType(array_element_type,
1783 num_elements, is_vector);
1784 array_element_type = clang_type;
1785 array_element_bit_stride =
1786 num_elements ? array_element_bit_stride * num_elements
1787 : array_element_bit_stride;
1788 }
1789 } else {
1790 clang_type =
1791 m_ast.CreateArrayType(array_element_type, 0, is_vector);
1792 }
1793 ConstString empty_name;
1794 type_sp.reset(new Type(
1795 die.GetID(), dwarf, empty_name, array_element_bit_stride / 8,
1796 NULL__null, DIERef(type_die_form).GetUID(dwarf), Type::eEncodingIsUID,
1797 &decl, clang_type, Type::eResolveStateFull));
1798 type_sp->SetEncodingType(element_type);
1799 }
1800 }
1801 } break;
1802
1803 case DW_TAG_ptr_to_member_type: {
1804 DWARFFormValue type_die_form;
1805 DWARFFormValue containing_type_die_form;
1806
1807 const size_t num_attributes = die.GetAttributes(attributes);
1808
1809 if (num_attributes > 0) {
1810 uint32_t i;
1811 for (i = 0; i < num_attributes; ++i) {
1812 attr = attributes.AttributeAtIndex(i);
1813 if (attributes.ExtractFormValueAtIndex(i, form_value)) {
1814 switch (attr) {
1815 case DW_AT_type:
1816 type_die_form = form_value;
1817 break;
1818 case DW_AT_containing_type:
1819 containing_type_die_form = form_value;
1820 break;
1821 }
1822 }
1823 }
1824
1825 Type *pointee_type = dwarf->ResolveTypeUID(DIERef(type_die_form));
1826 Type *class_type =
1827 dwarf->ResolveTypeUID(DIERef(containing_type_die_form));
1828
1829 CompilerType pointee_clang_type =
1830 pointee_type->GetForwardCompilerType();
1831 CompilerType class_clang_type = class_type->GetLayoutCompilerType();
1832
1833 clang_type = ClangASTContext::CreateMemberPointerType(
1834 class_clang_type, pointee_clang_type);
1835
1836 byte_size = clang_type.GetByteSize(nullptr);
1837
1838 type_sp.reset(new Type(die.GetID(), dwarf, type_name_const_str,
1839 byte_size, NULL__null, LLDB_INVALID_UID(18446744073709551615UL),
1840 Type::eEncodingIsUID, NULL__null, clang_type,
1841 Type::eResolveStateForward));
1842 }
1843
1844 break;
1845 }
1846 default:
1847 dwarf->GetObjectFile()->GetModule()->ReportError(
1848 "{0x%8.8x}: unhandled type tag 0x%4.4x (%s), please file a bug and "
1849 "attach the file at the start of this error message",
1850 die.GetOffset(), tag, DW_TAG_value_to_name(tag));
1851 break;
1852 }
1853
1854 if (type_sp.get()) {
1855 DWARFDIE sc_parent_die =
1856 SymbolFileDWARF::GetParentSymbolContextDIE(die);
1857 dw_tag_t sc_parent_tag = sc_parent_die.Tag();
1858
1859 SymbolContextScope *symbol_context_scope = NULL__null;
1860 if (sc_parent_tag == DW_TAG_compile_unit) {
1861 symbol_context_scope = sc.comp_unit;
1862 } else if (sc.function != NULL__null && sc_parent_die) {
1863 symbol_context_scope =
1864 sc.function->GetBlock(true).FindBlockByID(sc_parent_die.GetID());
1865 if (symbol_context_scope == NULL__null)
1866 symbol_context_scope = sc.function;
1867 }
1868
1869 if (symbol_context_scope != NULL__null) {
1870 type_sp->SetSymbolContextScope(symbol_context_scope);
1871 }
1872
1873 // We are ready to put this type into the uniqued list up at the module
1874 // level
1875 type_list->Insert(type_sp);
1876
1877 dwarf->GetDIEToType()[die.GetDIE()] = type_sp.get();
1878 }
1879 } else if (type_ptr != DIE_IS_BEING_PARSED((lldb_private::Type *)1)) {
1880 type_sp = type_ptr->shared_from_this();
1881 }
1882 }
1883 return type_sp;
1884}
1885
1886// DWARF parsing functions
1887
1888class DWARFASTParserClang::DelayedAddObjCClassProperty {
1889public:
1890 DelayedAddObjCClassProperty(
1891 const CompilerType &class_opaque_type, const char *property_name,
1892 const CompilerType &property_opaque_type, // The property type is only
1893 // required if you don't have an
1894 // ivar decl
1895 clang::ObjCIvarDecl *ivar_decl, const char *property_setter_name,
1896 const char *property_getter_name, uint32_t property_attributes,
1897 const ClangASTMetadata *metadata)
1898 : m_class_opaque_type(class_opaque_type), m_property_name(property_name),
1899 m_property_opaque_type(property_opaque_type), m_ivar_decl(ivar_decl),
1900 m_property_setter_name(property_setter_name),
1901 m_property_getter_name(property_getter_name),
1902 m_property_attributes(property_attributes) {
1903 if (metadata != NULL__null) {
1904 m_metadata_ap.reset(new ClangASTMetadata());
1905 *m_metadata_ap = *metadata;
1906 }
1907 }
1908
1909 DelayedAddObjCClassProperty(const DelayedAddObjCClassProperty &rhs) {
1910 *this = rhs;
1911 }
1912
1913 DelayedAddObjCClassProperty &
1914 operator=(const DelayedAddObjCClassProperty &rhs) {
1915 m_class_opaque_type = rhs.m_class_opaque_type;
1916 m_property_name = rhs.m_property_name;
1917 m_property_opaque_type = rhs.m_property_opaque_type;
1918 m_ivar_decl = rhs.m_ivar_decl;
1919 m_property_setter_name = rhs.m_property_setter_name;
1920 m_property_getter_name = rhs.m_property_getter_name;
1921 m_property_attributes = rhs.m_property_attributes;
1922
1923 if (rhs.m_metadata_ap.get()) {
1924 m_metadata_ap.reset(new ClangASTMetadata());
1925 *m_metadata_ap = *rhs.m_metadata_ap;
1926 }
1927 return *this;
1928 }
1929
1930 bool Finalize() {
1931 return ClangASTContext::AddObjCClassProperty(
1932 m_class_opaque_type, m_property_name, m_property_opaque_type,
1933 m_ivar_decl, m_property_setter_name, m_property_getter_name,
1934 m_property_attributes, m_metadata_ap.get());
1935 }
1936
1937private:
1938 CompilerType m_class_opaque_type;
1939 const char *m_property_name;
1940 CompilerType m_property_opaque_type;
1941 clang::ObjCIvarDecl *m_ivar_decl;
1942 const char *m_property_setter_name;
1943 const char *m_property_getter_name;
1944 uint32_t m_property_attributes;
1945 std::unique_ptr<ClangASTMetadata> m_metadata_ap;
1946};
1947
1948bool DWARFASTParserClang::ParseTemplateDIE(
1949 const DWARFDIE &die,
1950 ClangASTContext::TemplateParameterInfos &template_param_infos) {
1951 const dw_tag_t tag = die.Tag();
1952
1953 switch (tag) {
1954 case DW_TAG_template_type_parameter:
1955 case DW_TAG_template_value_parameter: {
1956 DWARFAttributes attributes;
1957 const size_t num_attributes = die.GetAttributes(attributes);
1958 const char *name = nullptr;
1959 CompilerType clang_type;
1960 uint64_t uval64 = 0;
1961 bool uval64_valid = false;
1962 if (num_attributes > 0) {
1963 DWARFFormValue form_value;
1964 for (size_t i = 0; i < num_attributes; ++i) {
1965 const dw_attr_t attr = attributes.AttributeAtIndex(i);
1966
1967 switch (attr) {
1968 case DW_AT_name:
1969 if (attributes.ExtractFormValueAtIndex(i, form_value))
1970 name = form_value.AsCString();
1971 break;
1972
1973 case DW_AT_type:
1974 if (attributes.ExtractFormValueAtIndex(i, form_value)) {
1975 Type *lldb_type = die.ResolveTypeUID(DIERef(form_value));
1976 if (lldb_type)
1977 clang_type = lldb_type->GetForwardCompilerType();
1978 }
1979 break;
1980
1981 case DW_AT_const_value:
1982 if (attributes.ExtractFormValueAtIndex(i, form_value)) {
1983 uval64_valid = true;
1984 uval64 = form_value.Unsigned();
1985 }
1986 break;
1987 default:
1988 break;
1989 }
1990 }
1991
1992 clang::ASTContext *ast = m_ast.getASTContext();
1993 if (!clang_type)
1994 clang_type = m_ast.GetBasicType(eBasicTypeVoid);
1995
1996 if (clang_type) {
1997 bool is_signed = false;
1998 if (name && name[0])
1999 template_param_infos.names.push_back(name);
2000 else
2001 template_param_infos.names.push_back(NULL__null);
2002
2003 // Get the signed value for any integer or enumeration if available
2004 clang_type.IsIntegerOrEnumerationType(is_signed);
2005
2006 if (tag == DW_TAG_template_value_parameter && uval64_valid) {
2007 llvm::APInt apint(clang_type.GetBitSize(nullptr), uval64, is_signed);
2008 template_param_infos.args.push_back(
2009 clang::TemplateArgument(*ast, llvm::APSInt(apint, !is_signed),
2010 ClangUtil::GetQualType(clang_type)));
2011 } else {
2012 template_param_infos.args.push_back(
2013 clang::TemplateArgument(ClangUtil::GetQualType(clang_type)));
2014 }
2015 } else {
2016 return false;
2017 }
2018 }
2019 }
2020 return true;
2021
2022 default:
2023 break;
2024 }
2025 return false;
2026}
2027
2028bool DWARFASTParserClang::ParseTemplateParameterInfos(
2029 const DWARFDIE &parent_die,
2030 ClangASTContext::TemplateParameterInfos &template_param_infos) {
2031
2032 if (!parent_die)
2033 return false;
2034
2035 Args template_parameter_names;
2036 for (DWARFDIE die = parent_die.GetFirstChild(); die.IsValid();
2037 die = die.GetSibling()) {
2038 const dw_tag_t tag = die.Tag();
2039
2040 switch (tag) {
2041 case DW_TAG_template_type_parameter:
2042 case DW_TAG_template_value_parameter:
2043 ParseTemplateDIE(die, template_param_infos);
2044 break;
2045
2046 default:
2047 break;
2048 }
2049 }
2050 if (template_param_infos.args.empty())
2051 return false;
2052 return template_param_infos.args.size() == template_param_infos.names.size();
2053}
2054
2055bool DWARFASTParserClang::CompleteTypeFromDWARF(const DWARFDIE &die,
2056 lldb_private::Type *type,
2057 CompilerType &clang_type) {
2058 SymbolFileDWARF *dwarf = die.GetDWARF();
2059
2060 std::lock_guard<std::recursive_mutex> guard(
2061 dwarf->GetObjectFile()->GetModule()->GetMutex());
2062
2063 // Disable external storage for this type so we don't get anymore
2064 // clang::ExternalASTSource queries for this type.
2065 m_ast.SetHasExternalStorage(clang_type.GetOpaqueQualType(), false);
2066
2067 if (!die)
2068 return false;
2069
2070#if defined LLDB_CONFIGURATION_DEBUG
2071 //----------------------------------------------------------------------
2072 // For debugging purposes, the LLDB_DWARF_DONT_COMPLETE_TYPENAMES
2073 // environment variable can be set with one or more typenames separated
2074 // by ';' characters. This will cause this function to not complete any
2075 // types whose names match.
2076 //
2077 // Examples of setting this environment variable:
2078 //
2079 // LLDB_DWARF_DONT_COMPLETE_TYPENAMES=Foo
2080 // LLDB_DWARF_DONT_COMPLETE_TYPENAMES=Foo;Bar;Baz
2081 //----------------------------------------------------------------------
2082 const char *dont_complete_typenames_cstr =
2083 getenv("LLDB_DWARF_DONT_COMPLETE_TYPENAMES");
2084 if (dont_complete_typenames_cstr && dont_complete_typenames_cstr[0]) {
2085 const char *die_name = die.GetName();
2086 if (die_name && die_name[0]) {
2087 const char *match = strstr(dont_complete_typenames_cstr, die_name);
2088 if (match) {
2089 size_t die_name_length = strlen(die_name);
2090 while (match) {
2091 const char separator_char = ';';
2092 const char next_char = match[die_name_length];
2093 if (next_char == '\0' || next_char == separator_char) {
2094 if (match == dont_complete_typenames_cstr ||
2095 match[-1] == separator_char)
2096 return false;
2097 }
2098 match = strstr(match + 1, die_name);
2099 }
2100 }
2101 }
2102 }
2103#endif
2104
2105 const dw_tag_t tag = die.Tag();
2106
2107 Log *log =
2108 nullptr; // (LogChannelDWARF::GetLogIfAny(DWARF_LOG_DEBUG_INFO|DWARF_LOG_TYPE_COMPLETION));
2109 if (log)
2110 dwarf->GetObjectFile()->GetModule()->LogMessageVerboseBacktrace(
2111 log, "0x%8.8" PRIx64"l" "x" ": %s '%s' resolving forward declaration...",
2112 die.GetID(), die.GetTagAsCString(), type->GetName().AsCString());
2113 assert(clang_type)((clang_type) ? static_cast<void> (0) : __assert_fail (
"clang_type", "/tmp/buildd/llvm-toolchain-snapshot-5.0~svn298304/tools/lldb/source/Plugins/SymbolFile/DWARF/DWARFASTParserClang.cpp"
, 2113, __PRETTY_FUNCTION__))
;
2114 DWARFAttributes attributes;
2115 switch (tag) {
2116 case DW_TAG_structure_type:
2117 case DW_TAG_union_type:
2118 case DW_TAG_class_type: {
2119 ClangASTImporter::LayoutInfo layout_info;
2120
2121 {
2122 if (die.HasChildren()) {
2123 LanguageType class_language = eLanguageTypeUnknown;
2124 if (ClangASTContext::IsObjCObjectOrInterfaceType(clang_type)) {
2125 class_language = eLanguageTypeObjC;
2126 // For objective C we don't start the definition when
2127 // the class is created.
2128 ClangASTContext::StartTagDeclarationDefinition(clang_type);
2129 }
2130
2131 int tag_decl_kind = -1;
2132 AccessType default_accessibility = eAccessNone;
2133 if (tag == DW_TAG_structure_type) {
2134 tag_decl_kind = clang::TTK_Struct;
2135 default_accessibility = eAccessPublic;
2136 } else if (tag == DW_TAG_union_type) {
2137 tag_decl_kind = clang::TTK_Union;
2138 default_accessibility = eAccessPublic;
2139 } else if (tag == DW_TAG_class_type) {
2140 tag_decl_kind = clang::TTK_Class;
2141 default_accessibility = eAccessPrivate;
2142 }
2143
2144 SymbolContext sc(die.GetLLDBCompileUnit());
2145 std::vector<clang::CXXBaseSpecifier *> base_classes;
2146 std::vector<int> member_accessibilities;
2147 bool is_a_class = false;
2148 // Parse members and base classes first
2149 DWARFDIECollection member_function_dies;
2150
2151 DelayedPropertyList delayed_properties;
2152 ParseChildMembers(sc, die, clang_type, class_language, base_classes,
2153 member_accessibilities, member_function_dies,
2154 delayed_properties, default_accessibility, is_a_class,
2155 layout_info);
2156
2157 // Now parse any methods if there were any...
2158 size_t num_functions = member_function_dies.Size();
2159 if (num_functions > 0) {
2160 for (size_t i = 0; i < num_functions; ++i) {
2161 dwarf->ResolveType(member_function_dies.GetDIEAtIndex(i));
2162 }
2163 }
2164
2165 if (class_language == eLanguageTypeObjC) {
2166 ConstString class_name(clang_type.GetTypeName());
2167 if (class_name) {
2168 DIEArray method_die_offsets;
2169 dwarf->GetObjCMethodDIEOffsets(class_name, method_die_offsets);
2170
2171 if (!method_die_offsets.empty()) {
2172 DWARFDebugInfo *debug_info = dwarf->DebugInfo();
2173
2174 const size_t num_matches = method_die_offsets.size();
2175 for (size_t i = 0; i < num_matches; ++i) {
2176 const DIERef &die_ref = method_die_offsets[i];
2177 DWARFDIE method_die = debug_info->GetDIE(die_ref);
2178
2179 if (method_die)
2180 method_die.ResolveType();
2181 }
2182 }
2183
2184 for (DelayedPropertyList::iterator pi = delayed_properties.begin(),
2185 pe = delayed_properties.end();
2186 pi != pe; ++pi)
2187 pi->Finalize();
2188 }
2189 }
2190
2191 // If we have a DW_TAG_structure_type instead of a DW_TAG_class_type we
2192 // need to tell the clang type it is actually a class.
2193 if (class_language != eLanguageTypeObjC) {
2194 if (is_a_class && tag_decl_kind != clang::TTK_Class)
2195 m_ast.SetTagTypeKind(ClangUtil::GetQualType(clang_type),
2196 clang::TTK_Class);
2197 }
2198
2199 // Since DW_TAG_structure_type gets used for both classes
2200 // and structures, we may need to set any DW_TAG_member
2201 // fields to have a "private" access if none was specified.
2202 // When we parsed the child members we tracked that actual
2203 // accessibility value for each DW_TAG_member in the
2204 // "member_accessibilities" array. If the value for the
2205 // member is zero, then it was set to the "default_accessibility"
2206 // which for structs was "public". Below we correct this
2207 // by setting any fields to "private" that weren't correctly
2208 // set.
2209 if (is_a_class && !member_accessibilities.empty()) {
2210 // This is a class and all members that didn't have
2211 // their access specified are private.
2212 m_ast.SetDefaultAccessForRecordFields(
2213 m_ast.GetAsRecordDecl(clang_type), eAccessPrivate,
2214 &member_accessibilities.front(), member_accessibilities.size());
2215 }
2216
2217 if (!base_classes.empty()) {
2218 // Make sure all base classes refer to complete types and not
2219 // forward declarations. If we don't do this, clang will crash
2220 // with an assertion in the call to
2221 // clang_type.SetBaseClassesForClassType()
2222 for (auto &base_class : base_classes) {
2223 clang::TypeSourceInfo *type_source_info =
2224 base_class->getTypeSourceInfo();
2225 if (type_source_info) {
2226 CompilerType base_class_type(
2227 &m_ast, type_source_info->getType().getAsOpaquePtr());
2228 if (base_class_type.GetCompleteType() == false) {
2229 auto module = dwarf->GetObjectFile()->GetModule();
2230 module->ReportError(":: Class '%s' has a base class '%s' which "
2231 "does not have a complete definition.",
2232 die.GetName(),
2233 base_class_type.GetTypeName().GetCString());
2234 if (die.GetCU()->GetProducer() ==
2235 DWARFCompileUnit::eProducerClang)
2236 module->ReportError(":: Try compiling the source file with "
2237 "-fno-limit-debug-info.");
2238
2239 // We have no choice other than to pretend that the base class
2240 // is complete. If we don't do this, clang will crash when we
2241 // call setBases() inside of
2242 // "clang_type.SetBaseClassesForClassType()"
2243 // below. Since we provide layout assistance, all ivars in this
2244 // class and other classes will be fine, this is the best we can
2245 // do
2246 // short of crashing.
2247 if (ClangASTContext::StartTagDeclarationDefinition(
2248 base_class_type)) {
2249 ClangASTContext::CompleteTagDeclarationDefinition(
2250 base_class_type);
2251 }
2252 }
2253 }
2254 }
2255 m_ast.SetBaseClassesForClassType(clang_type.GetOpaqueQualType(),
2256 &base_classes.front(),
2257 base_classes.size());
2258
2259 // Clang will copy each CXXBaseSpecifier in "base_classes"
2260 // so we have to free them all.
2261 ClangASTContext::DeleteBaseClassSpecifiers(&base_classes.front(),
2262 base_classes.size());
2263 }
2264 }
2265 }
2266
2267 ClangASTContext::BuildIndirectFields(clang_type);
2268 ClangASTContext::CompleteTagDeclarationDefinition(clang_type);
2269
2270 if (!layout_info.field_offsets.empty() ||
2271 !layout_info.base_offsets.empty() ||
2272 !layout_info.vbase_offsets.empty()) {
2273 if (type)
2274 layout_info.bit_size = type->GetByteSize() * 8;
2275 if (layout_info.bit_size == 0)
2276 layout_info.bit_size =
2277 die.GetAttributeValueAsUnsigned(DW_AT_byte_size, 0) * 8;
2278
2279 clang::CXXRecordDecl *record_decl =
2280 m_ast.GetAsCXXRecordDecl(clang_type.GetOpaqueQualType());
2281 if (record_decl) {
2282 if (log) {
2283 ModuleSP module_sp = dwarf->GetObjectFile()->GetModule();
2284
2285 if (module_sp) {
2286 module_sp->LogMessage(
2287 log,
2288 "ClangASTContext::CompleteTypeFromDWARF (clang_type = %p) "
2289 "caching layout info for record_decl = %p, bit_size = %" PRIu64"l" "u"
2290 ", alignment = %" PRIu64"l" "u"
2291 ", field_offsets[%u], base_offsets[%u], vbase_offsets[%u])",
2292 static_cast<void *>(clang_type.GetOpaqueQualType()),
2293 static_cast<void *>(record_decl), layout_info.bit_size,
2294 layout_info.alignment,
2295 static_cast<uint32_t>(layout_info.field_offsets.size()),
2296 static_cast<uint32_t>(layout_info.base_offsets.size()),
2297 static_cast<uint32_t>(layout_info.vbase_offsets.size()));
2298
2299 uint32_t idx;
2300 {
2301 llvm::DenseMap<const clang::FieldDecl *, uint64_t>::const_iterator
2302 pos,
2303 end = layout_info.field_offsets.end();
2304 for (idx = 0, pos = layout_info.field_offsets.begin(); pos != end;
2305 ++pos, ++idx) {
2306 module_sp->LogMessage(
2307 log, "ClangASTContext::CompleteTypeFromDWARF (clang_type = "
2308 "%p) field[%u] = { bit_offset=%u, name='%s' }",
2309 static_cast<void *>(clang_type.GetOpaqueQualType()), idx,
2310 static_cast<uint32_t>(pos->second),
2311 pos->first->getNameAsString().c_str());
2312 }
2313 }
2314
2315 {
2316 llvm::DenseMap<const clang::CXXRecordDecl *,
2317 clang::CharUnits>::const_iterator base_pos,
2318 base_end = layout_info.base_offsets.end();
2319 for (idx = 0, base_pos = layout_info.base_offsets.begin();
2320 base_pos != base_end; ++base_pos, ++idx) {
2321 module_sp->LogMessage(
2322 log, "ClangASTContext::CompleteTypeFromDWARF (clang_type = "
2323 "%p) base[%u] = { byte_offset=%u, name='%s' }",
2324 clang_type.GetOpaqueQualType(), idx,
2325 (uint32_t)base_pos->second.getQuantity(),
2326 base_pos->first->getNameAsString().c_str());
2327 }
2328 }
2329 {
2330 llvm::DenseMap<const clang::CXXRecordDecl *,
2331 clang::CharUnits>::const_iterator vbase_pos,
2332 vbase_end = layout_info.vbase_offsets.end();
2333 for (idx = 0, vbase_pos = layout_info.vbase_offsets.begin();
2334 vbase_pos != vbase_end; ++vbase_pos, ++idx) {
2335 module_sp->LogMessage(
2336 log, "ClangASTContext::CompleteTypeFromDWARF (clang_type = "
2337 "%p) vbase[%u] = { byte_offset=%u, name='%s' }",
2338 static_cast<void *>(clang_type.GetOpaqueQualType()), idx,
2339 static_cast<uint32_t>(vbase_pos->second.getQuantity()),
2340 vbase_pos->first->getNameAsString().c_str());
2341 }
2342 }
2343 }
2344 }
2345 GetClangASTImporter().InsertRecordDecl(record_decl, layout_info);
2346 }
2347 }
2348 }
2349
2350 return (bool)clang_type;
2351
2352 case DW_TAG_enumeration_type:
2353 if (ClangASTContext::StartTagDeclarationDefinition(clang_type)) {
2354 if (die.HasChildren()) {
2355 SymbolContext sc(die.GetLLDBCompileUnit());
2356 bool is_signed = false;
2357 clang_type.IsIntegerType(is_signed);
2358 ParseChildEnumerators(sc, clang_type, is_signed, type->GetByteSize(),
2359 die);
2360 }
2361 ClangASTContext::CompleteTagDeclarationDefinition(clang_type);
2362 }
2363 return (bool)clang_type;
2364
2365 default:
2366 assert(false && "not a forward clang type decl!")((false && "not a forward clang type decl!") ? static_cast
<void> (0) : __assert_fail ("false && \"not a forward clang type decl!\""
, "/tmp/buildd/llvm-toolchain-snapshot-5.0~svn298304/tools/lldb/source/Plugins/SymbolFile/DWARF/DWARFASTParserClang.cpp"
, 2366, __PRETTY_FUNCTION__))
;
2367 break;
2368 }
2369
2370 return false;
2371}
2372
2373std::vector<DWARFDIE> DWARFASTParserClang::GetDIEForDeclContext(
2374 lldb_private::CompilerDeclContext decl_context) {
2375 std::vector<DWARFDIE> result;
2376 for (auto it = m_decl_ctx_to_die.find(
2377 (clang::DeclContext *)decl_context.GetOpaqueDeclContext());
2378 it != m_decl_ctx_to_die.end(); it++)
2379 result.push_back(it->second);
2380 return result;
2381}
2382
2383CompilerDecl DWARFASTParserClang::GetDeclForUIDFromDWARF(const DWARFDIE &die) {
2384 clang::Decl *clang_decl = GetClangDeclForDIE(die);
2385 if (clang_decl != nullptr)
2386 return CompilerDecl(&m_ast, clang_decl);
2387 return CompilerDecl();
2388}
2389
2390CompilerDeclContext
2391DWARFASTParserClang::GetDeclContextForUIDFromDWARF(const DWARFDIE &die) {
2392 clang::DeclContext *clang_decl_ctx = GetClangDeclContextForDIE(die);
2393 if (clang_decl_ctx)
2394 return CompilerDeclContext(&m_ast, clang_decl_ctx);
2395 return CompilerDeclContext();
2396}
2397
2398CompilerDeclContext
2399DWARFASTParserClang::GetDeclContextContainingUIDFromDWARF(const DWARFDIE &die) {
2400 clang::DeclContext *clang_decl_ctx =
2401 GetClangDeclContextContainingDIE(die, nullptr);
2402 if (clang_decl_ctx)
2403 return CompilerDeclContext(&m_ast, clang_decl_ctx);
2404 return CompilerDeclContext();
2405}
2406
2407size_t DWARFASTParserClang::ParseChildEnumerators(
2408 const SymbolContext &sc, lldb_private::CompilerType &clang_type,
2409 bool is_signed, uint32_t enumerator_byte_size, const DWARFDIE &parent_die) {
2410 if (!parent_die)
2411 return 0;
2412
2413 size_t enumerators_added = 0;
2414
2415 for (DWARFDIE die = parent_die.GetFirstChild(); die.IsValid();
2416 die = die.GetSibling()) {
2417 const dw_tag_t tag = die.Tag();
2418 if (tag == DW_TAG_enumerator) {
2419 DWARFAttributes attributes;
2420 const size_t num_child_attributes = die.GetAttributes(attributes);
2421 if (num_child_attributes > 0) {
2422 const char *name = NULL__null;
2423 bool got_value = false;
2424 int64_t enum_value = 0;
2425 Declaration decl;
2426
2427 uint32_t i;
2428 for (i = 0; i < num_child_attributes; ++i) {
2429 const dw_attr_t attr = attributes.AttributeAtIndex(i);
2430 DWARFFormValue form_value;
2431 if (attributes.ExtractFormValueAtIndex(i, form_value)) {
2432 switch (attr) {
2433 case DW_AT_const_value:
2434 got_value = true;
2435 if (is_signed)
2436 enum_value = form_value.Signed();
2437 else
2438 enum_value = form_value.Unsigned();
2439 break;
2440
2441 case DW_AT_name:
2442 name = form_value.AsCString();
2443 break;
2444
2445 case DW_AT_description:
2446 default:
2447 case DW_AT_decl_file:
2448 decl.SetFile(sc.comp_unit->GetSupportFiles().GetFileSpecAtIndex(
2449 form_value.Unsigned()));
2450 break;
2451 case DW_AT_decl_line:
2452 decl.SetLine(form_value.Unsigned());
2453 break;
2454 case DW_AT_decl_column:
2455 decl.SetColumn(form_value.Unsigned());
2456 break;
2457 case DW_AT_sibling:
2458 break;
2459 }
2460 }
2461 }
2462
2463 if (name && name[0] && got_value) {
2464 m_ast.AddEnumerationValueToEnumerationType(
2465 clang_type.GetOpaqueQualType(),
2466 m_ast.GetEnumerationIntegerType(clang_type.GetOpaqueQualType()),
2467 decl, name, enum_value, enumerator_byte_size * 8);
2468 ++enumerators_added;
2469 }
2470 }
2471 }
2472 }
2473 return enumerators_added;
2474}
2475
2476#if defined(LLDB_CONFIGURATION_DEBUG) || defined(LLDB_CONFIGURATION_RELEASE)
2477
2478class DIEStack {
2479public:
2480 void Push(const DWARFDIE &die) { m_dies.push_back(die); }
2481
2482 void LogDIEs(Log *log) {
2483 StreamString log_strm;
2484 const size_t n = m_dies.size();
2485 log_strm.Printf("DIEStack[%" PRIu64"l" "u" "]:\n", (uint64_t)n);
2486 for (size_t i = 0; i < n; i++) {
2487 std::string qualified_name;
2488 const DWARFDIE &die = m_dies[i];
2489 die.GetQualifiedName(qualified_name);
2490 log_strm.Printf("[%" PRIu64"l" "u" "] 0x%8.8x: %s name='%s'\n", (uint64_t)i,
2491 die.GetOffset(), die.GetTagAsCString(),
2492 qualified_name.c_str());
2493 }
2494 log->PutCString(log_strm.GetData());
2495 }
2496 void Pop() { m_dies.pop_back(); }
2497
2498 class ScopedPopper {
2499 public:
2500 ScopedPopper(DIEStack &die_stack)
2501 : m_die_stack(die_stack), m_valid(false) {}
2502
2503 void Push(const DWARFDIE &die) {
2504 m_valid = true;
2505 m_die_stack.Push(die);
2506 }
2507
2508 ~ScopedPopper() {
2509 if (m_valid)
2510 m_die_stack.Pop();
2511 }
2512
2513 protected:
2514 DIEStack &m_die_stack;
2515 bool m_valid;
2516 };
2517
2518protected:
2519 typedef std::vector<DWARFDIE> Stack;
2520 Stack m_dies;
2521};
2522#endif
2523
2524Function *DWARFASTParserClang::ParseFunctionFromDWARF(const SymbolContext &sc,
2525 const DWARFDIE &die) {
2526 DWARFRangeList func_ranges;
2527 const char *name = NULL__null;
2528 const char *mangled = NULL__null;
2529 int decl_file = 0;
2530 int decl_line = 0;
2531 int decl_column = 0;
2532 int call_file = 0;
2533 int call_line = 0;
2534 int call_column = 0;
2535 DWARFExpression frame_base(die.GetCU());
2536
2537 const dw_tag_t tag = die.Tag();
2538
2539 if (tag != DW_TAG_subprogram)
2540 return NULL__null;
2541
2542 if (die.GetDIENamesAndRanges(name, mangled, func_ranges, decl_file, decl_line,
2543 decl_column, call_file, call_line, call_column,
2544 &frame_base)) {
2545
2546 // Union of all ranges in the function DIE (if the function is
2547 // discontiguous)
2548 AddressRange func_range;
2549 lldb::addr_t lowest_func_addr = func_ranges.GetMinRangeBase(0);
2550 lldb::addr_t highest_func_addr = func_ranges.GetMaxRangeEnd(0);
2551 if (lowest_func_addr != LLDB_INVALID_ADDRESS(18446744073709551615UL) &&
2552 lowest_func_addr <= highest_func_addr) {
2553 ModuleSP module_sp(die.GetModule());
2554 func_range.GetBaseAddress().ResolveAddressUsingFileSections(
2555 lowest_func_addr, module_sp->GetSectionList());
2556 if (func_range.GetBaseAddress().IsValid())
2557 func_range.SetByteSize(highest_func_addr - lowest_func_addr);
2558 }
2559
2560 if (func_range.GetBaseAddress().IsValid()) {
2561 Mangled func_name;
2562 if (mangled)
2563 func_name.SetValue(ConstString(mangled), true);
2564 else if (die.GetParent().Tag() == DW_TAG_compile_unit &&
2565 Language::LanguageIsCPlusPlus(die.GetLanguage()) && name &&
2566 strcmp(name, "main") != 0) {
2567 // If the mangled name is not present in the DWARF, generate the
2568 // demangled name
2569 // using the decl context. We skip if the function is "main" as its name
2570 // is
2571 // never mangled.
2572 bool is_static = false;
2573 bool is_variadic = false;
2574 bool has_template_params = false;
2575 unsigned type_quals = 0;
2576 std::vector<CompilerType> param_types;
2577 std::vector<clang::ParmVarDecl *> param_decls;
2578 DWARFDeclContext decl_ctx;
2579 StreamString sstr;
2580
2581 die.GetDWARFDeclContext(decl_ctx);
2582 sstr << decl_ctx.GetQualifiedName();
2583
2584 clang::DeclContext *containing_decl_ctx =
2585 GetClangDeclContextContainingDIE(die, nullptr);
2586 ParseChildParameters(sc, containing_decl_ctx, die, true, is_static,
2587 is_variadic, has_template_params, param_types,
2588 param_decls, type_quals);
2589 sstr << "(";
2590 for (size_t i = 0; i < param_types.size(); i++) {
2591 if (i > 0)
2592 sstr << ", ";
2593 sstr << param_types[i].GetTypeName();
2594 }
2595 if (is_variadic)
2596 sstr << ", ...";
2597 sstr << ")";
2598 if (type_quals & clang::Qualifiers::Const)
2599 sstr << " const";
2600
2601 func_name.SetValue(ConstString(sstr.GetString()), false);
2602 } else
2603 func_name.SetValue(ConstString(name), false);
2604
2605 FunctionSP func_sp;
2606 std::unique_ptr<Declaration> decl_ap;
2607 if (decl_file != 0 || decl_line != 0 || decl_column != 0)
2608 decl_ap.reset(new Declaration(
2609 sc.comp_unit->GetSupportFiles().GetFileSpecAtIndex(decl_file),
2610 decl_line, decl_column));
2611
2612 SymbolFileDWARF *dwarf = die.GetDWARF();
2613 // Supply the type _only_ if it has already been parsed
2614 Type *func_type = dwarf->GetDIEToType().lookup(die.GetDIE());
2615
2616 assert(func_type == NULL || func_type != DIE_IS_BEING_PARSED)((func_type == __null || func_type != ((lldb_private::Type *)
1)) ? static_cast<void> (0) : __assert_fail ("func_type == NULL || func_type != DIE_IS_BEING_PARSED"
, "/tmp/buildd/llvm-toolchain-snapshot-5.0~svn298304/tools/lldb/source/Plugins/SymbolFile/DWARF/DWARFASTParserClang.cpp"
, 2616, __PRETTY_FUNCTION__))
;
2617
2618 if (dwarf->FixupAddress(func_range.GetBaseAddress())) {
2619 const user_id_t func_user_id = die.GetID();
2620 func_sp.reset(new Function(sc.comp_unit,
2621 func_user_id, // UserID is the DIE offset
2622 func_user_id, func_name, func_type,
2623 func_range)); // first address range
2624
2625 if (func_sp.get() != NULL__null) {
2626 if (frame_base.IsValid())
2627 func_sp->GetFrameBaseExpression() = frame_base;
2628 sc.comp_unit->AddFunction(func_sp);
2629 return func_sp.get();
2630 }
2631 }
2632 }
2633 }
2634 return NULL__null;
2635}
2636
2637bool DWARFASTParserClang::ParseChildMembers(
2638 const SymbolContext &sc, const DWARFDIE &parent_die,
2639 CompilerType &class_clang_type, const LanguageType class_language,
2640 std::vector<clang::CXXBaseSpecifier *> &base_classes,
2641 std::vector<int> &member_accessibilities,
2642 DWARFDIECollection &member_function_dies,
2643 DelayedPropertyList &delayed_properties, AccessType &default_accessibility,
2644 bool &is_a_class, ClangASTImporter::LayoutInfo &layout_info) {
2645 if (!parent_die)
2646 return 0;
2647
2648 // Get the parent byte size so we can verify any members will fit
2649 const uint64_t parent_byte_size =
2650 parent_die.GetAttributeValueAsUnsigned(DW_AT_byte_size, UINT64_MAX(18446744073709551615UL));
2651 const uint64_t parent_bit_size =
2652 parent_byte_size == UINT64_MAX(18446744073709551615UL) ? UINT64_MAX(18446744073709551615UL) : parent_byte_size * 8;
2653
2654 uint32_t member_idx = 0;
2655 BitfieldInfo last_field_info;
2656
2657 ModuleSP module_sp = parent_die.GetDWARF()->GetObjectFile()->GetModule();
2658 ClangASTContext *ast =
2659 llvm::dyn_cast_or_null<ClangASTContext>(class_clang_type.GetTypeSystem());
2660 if (ast == nullptr)
2661 return 0;
2662
2663 for (DWARFDIE die = parent_die.GetFirstChild(); die.IsValid();
2664 die = die.GetSibling()) {
2665 dw_tag_t tag = die.Tag();
2666
2667 switch (tag) {
2668 case DW_TAG_member:
2669 case DW_TAG_APPLE_property: {
2670 DWARFAttributes attributes;
2671 const size_t num_attributes = die.GetAttributes(attributes);
2672 if (num_attributes > 0) {
2673 Declaration decl;
2674 // DWARFExpression location;
2675 const char *name = NULL__null;
2676 const char *prop_name = NULL__null;
2677 const char *prop_getter_name = NULL__null;
2678 const char *prop_setter_name = NULL__null;
2679 uint32_t prop_attributes = 0;
2680
2681 bool is_artificial = false;
2682 DWARFFormValue encoding_form;
2683 AccessType accessibility = eAccessNone;
2684 uint32_t member_byte_offset =
2685 (parent_die.Tag() == DW_TAG_union_type) ? 0 : UINT32_MAX(4294967295U);
2686 size_t byte_size = 0;
2687 int64_t bit_offset = 0;
2688 uint64_t data_bit_offset = UINT64_MAX(18446744073709551615UL);
2689 size_t bit_size = 0;
2690 bool is_external =
2691 false; // On DW_TAG_members, this means the member is static
2692 uint32_t i;
2693 for (i = 0; i < num_attributes && !is_artificial; ++i) {
2694 const dw_attr_t attr = attributes.AttributeAtIndex(i);
2695 DWARFFormValue form_value;
2696 if (attributes.ExtractFormValueAtIndex(i, form_value)) {
2697 switch (attr) {
2698 case DW_AT_decl_file:
2699 decl.SetFile(sc.comp_unit->GetSupportFiles().GetFileSpecAtIndex(
2700 form_value.Unsigned()));
2701 break;
2702 case DW_AT_decl_line:
2703 decl.SetLine(form_value.Unsigned());
2704 break;
2705 case DW_AT_decl_column:
2706 decl.SetColumn(form_value.Unsigned());
2707 break;
2708 case DW_AT_name:
2709 name = form_value.AsCString();
2710 break;
2711 case DW_AT_type:
2712 encoding_form = form_value;
2713 break;
2714 case DW_AT_bit_offset:
2715 bit_offset = form_value.Signed();
2716 break;
2717 case DW_AT_bit_size:
2718 bit_size = form_value.Unsigned();
2719 break;
2720 case DW_AT_byte_size:
2721 byte_size = form_value.Unsigned();
2722 break;
2723 case DW_AT_data_bit_offset:
2724 data_bit_offset = form_value.Unsigned();
2725 break;
2726 case DW_AT_data_member_location:
2727 if (form_value.BlockData()) {
2728 Value initialValue(0);
2729 Value memberOffset(0);
2730 const DWARFDataExtractor &debug_info_data =
2731 die.GetDWARF()->get_debug_info_data();
2732 uint32_t block_length = form_value.Unsigned();
2733 uint32_t block_offset =
2734 form_value.BlockData() - debug_info_data.GetDataStart();
2735 if (DWARFExpression::Evaluate(
2736 nullptr, // ExecutionContext *
2737 nullptr, // ClangExpressionVariableList *
2738 nullptr, // ClangExpressionDeclMap *
2739 nullptr, // RegisterContext *
2740 module_sp, debug_info_data, die.GetCU(), block_offset,
2741 block_length, eRegisterKindDWARF, &initialValue,
2742 nullptr, memberOffset, nullptr)) {
2743 member_byte_offset = memberOffset.ResolveValue(NULL__null).UInt();
2744 }
2745 } else {
2746 // With DWARF 3 and later, if the value is an integer constant,
2747 // this form value is the offset in bytes from the beginning
2748 // of the containing entity.
2749 member_byte_offset = form_value.Unsigned();
2750 }
2751 break;
2752
2753 case DW_AT_accessibility:
2754 accessibility = DW_ACCESS_to_AccessType(form_value.Unsigned());
2755 break;
2756 case DW_AT_artificial:
2757 is_artificial = form_value.Boolean();
2758 break;
2759 case DW_AT_APPLE_property_name:
2760 prop_name = form_value.AsCString();
2761 break;
2762 case DW_AT_APPLE_property_getter:
2763 prop_getter_name = form_value.AsCString();
2764 break;
2765 case DW_AT_APPLE_property_setter:
2766 prop_setter_name = form_value.AsCString();
2767 break;
2768 case DW_AT_APPLE_property_attribute:
2769 prop_attributes = form_value.Unsigned();
2770 break;
2771 case DW_AT_external:
2772 is_external = form_value.Boolean();
2773 break;
2774
2775 default:
2776 case DW_AT_declaration:
2777 case DW_AT_description:
2778 case DW_AT_mutable:
2779 case DW_AT_visibility:
2780 case DW_AT_sibling:
2781 break;
2782 }
2783 }
2784 }
2785
2786 if (prop_name) {
2787 ConstString fixed_getter;
2788 ConstString fixed_setter;
2789
2790 // Check if the property getter/setter were provided as full
2791 // names. We want basenames, so we extract them.
2792
2793 if (prop_getter_name && prop_getter_name[0] == '-') {
2794 ObjCLanguage::MethodName prop_getter_method(prop_getter_name, true);
2795 prop_getter_name = prop_getter_method.GetSelector().GetCString();
2796 }
2797
2798 if (prop_setter_name && prop_setter_name[0] == '-') {
2799 ObjCLanguage::MethodName prop_setter_method(prop_setter_name, true);
2800 prop_setter_name = prop_setter_method.GetSelector().GetCString();
2801 }
2802
2803 // If the names haven't been provided, they need to be
2804 // filled in.
2805
2806 if (!prop_getter_name) {
2807 prop_getter_name = prop_name;
2808 }
2809 if (!prop_setter_name && prop_name[0] &&
2810 !(prop_attributes & DW_APPLE_PROPERTY_readonly)) {
2811 StreamString ss;
2812
2813 ss.Printf("set%c%s:", toupper(prop_name[0]), &prop_name[1]);
2814
2815 fixed_setter.SetString(ss.GetString());
2816 prop_setter_name = fixed_setter.GetCString();
2817 }
2818 }
2819
2820 // Clang has a DWARF generation bug where sometimes it
2821 // represents fields that are references with bad byte size
2822 // and bit size/offset information such as:
2823 //
2824 // DW_AT_byte_size( 0x00 )
2825 // DW_AT_bit_size( 0x40 )
2826 // DW_AT_bit_offset( 0xffffffffffffffc0 )
2827 //
2828 // So check the bit offset to make sure it is sane, and if
2829 // the values are not sane, remove them. If we don't do this
2830 // then we will end up with a crash if we try to use this
2831 // type in an expression when clang becomes unhappy with its
2832 // recycled debug info.
2833
2834 if (byte_size == 0 && bit_offset < 0) {
2835 bit_size = 0;
2836 bit_offset = 0;
2837 }
2838
2839 // FIXME: Make Clang ignore Objective-C accessibility for expressions
2840 if (class_language == eLanguageTypeObjC ||
2841 class_language == eLanguageTypeObjC_plus_plus)
2842 accessibility = eAccessNone;
2843
2844 if (member_idx == 0 && !is_artificial && name &&
2845 (strstr(name, "_vptr$") == name)) {
2846 // Not all compilers will mark the vtable pointer
2847 // member as artificial (llvm-gcc). We can't have
2848 // the virtual members in our classes otherwise it
2849 // throws off all child offsets since we end up
2850 // having and extra pointer sized member in our
2851 // class layouts.
2852 is_artificial = true;
2853 }
2854
2855 // Handle static members
2856 if (is_external && member_byte_offset == UINT32_MAX(4294967295U)) {
2857 Type *var_type = die.ResolveTypeUID(DIERef(encoding_form));
2858
2859 if (var_type) {
2860 if (accessibility == eAccessNone)
2861 accessibility = eAccessPublic;
2862 ClangASTContext::AddVariableToRecordType(
2863 class_clang_type, name, var_type->GetLayoutCompilerType(),
2864 accessibility);
2865 }
2866 break;
2867 }
2868
2869 if (is_artificial == false) {
2870 Type *member_type = die.ResolveTypeUID(DIERef(encoding_form));
2871
2872 clang::FieldDecl *field_decl = NULL__null;
2873 if (tag == DW_TAG_member) {
2874 if (member_type) {
2875 if (accessibility == eAccessNone)
2876 accessibility = default_accessibility;
2877 member_accessibilities.push_back(accessibility);
2878
2879 uint64_t field_bit_offset =
2880 (member_byte_offset == UINT32_MAX(4294967295U) ? 0
2881 : (member_byte_offset * 8));
2882 if (bit_size > 0) {
2883
2884 BitfieldInfo this_field_info;
2885 this_field_info.bit_offset = field_bit_offset;
2886 this_field_info.bit_size = bit_size;
2887
2888 /////////////////////////////////////////////////////////////
2889 // How to locate a field given the DWARF debug information
2890 //
2891 // AT_byte_size indicates the size of the word in which the
2892 // bit offset must be interpreted.
2893 //
2894 // AT_data_member_location indicates the byte offset of the
2895 // word from the base address of the structure.
2896 //
2897 // AT_bit_offset indicates how many bits into the word
2898 // (according to the host endianness) the low-order bit of
2899 // the field starts. AT_bit_offset can be negative.
2900 //
2901 // AT_bit_size indicates the size of the field in bits.
2902 /////////////////////////////////////////////////////////////
2903
2904 if (data_bit_offset != UINT64_MAX(18446744073709551615UL)) {
2905 this_field_info.bit_offset = data_bit_offset;
2906 } else {
2907 if (byte_size == 0)
2908 byte_size = member_type->GetByteSize();
2909
2910 ObjectFile *objfile = die.GetDWARF()->GetObjectFile();
2911 if (objfile->GetByteOrder() == eByteOrderLittle) {
2912 this_field_info.bit_offset += byte_size * 8;
2913 this_field_info.bit_offset -= (bit_offset + bit_size);
2914 } else {
2915 this_field_info.bit_offset += bit_offset;
2916 }
2917 }
2918
2919 if ((this_field_info.bit_offset >= parent_bit_size) ||
2920 !last_field_info.NextBitfieldOffsetIsValid(
2921 this_field_info.bit_offset)) {
2922 ObjectFile *objfile = die.GetDWARF()->GetObjectFile();
2923 objfile->GetModule()->ReportWarning(
2924 "0x%8.8" PRIx64"l" "x" ": %s bitfield named \"%s\" has invalid "
2925 "bit offset (0x%8.8" PRIx64"l" "x"
2926 ") member will be ignored. Please file a bug against the "
2927 "compiler and include the preprocessed output for %s\n",
2928 die.GetID(), DW_TAG_value_to_name(tag), name,
2929 this_field_info.bit_offset,
2930 sc.comp_unit ? sc.comp_unit->GetPath().c_str()
2931 : "the source file");
2932 this_field_info.Clear();
2933 continue;
2934 }
2935
2936 // Update the field bit offset we will report for layout
2937 field_bit_offset = this_field_info.bit_offset;
2938
2939 // If the member to be emitted did not start on a character
2940 // boundary and there is
2941 // empty space between the last field and this one, then we need
2942 // to emit an
2943 // anonymous member filling up the space up to its start. There
2944 // are three cases
2945 // here:
2946 //
2947 // 1 If the previous member ended on a character boundary, then
2948 // we can emit an
2949 // anonymous member starting at the most recent character
2950 // boundary.
2951 //
2952 // 2 If the previous member did not end on a character boundary
2953 // and the distance
2954 // from the end of the previous member to the current member
2955 // is less than a
2956 // word width, then we can emit an anonymous member starting
2957 // right after the
2958 // previous member and right before this member.
2959 //
2960 // 3 If the previous member did not end on a character boundary
2961 // and the distance
2962 // from the end of the previous member to the current member
2963 // is greater than
2964 // or equal a word width, then we act as in Case 1.
2965
2966 const uint64_t character_width = 8;
2967 const uint64_t word_width = 32;
2968
2969 // Objective-C has invalid DW_AT_bit_offset values in older
2970 // versions
2971 // of clang, so we have to be careful and only insert unnamed
2972 // bitfields
2973 // if we have a new enough clang.
2974 bool detect_unnamed_bitfields = true;
2975
2976 if (class_language == eLanguageTypeObjC ||
2977 class_language == eLanguageTypeObjC_plus_plus)
2978 detect_unnamed_bitfields =
2979 die.GetCU()->Supports_unnamed_objc_bitfields();
2980
2981 if (detect_unnamed_bitfields) {
2982 BitfieldInfo anon_field_info;
2983
2984 if ((this_field_info.bit_offset % character_width) !=
2985 0) // not char aligned
2986 {
2987 uint64_t last_field_end = 0;
2988
2989 if (last_field_info.IsValid())
2990 last_field_end =
2991 last_field_info.bit_offset + last_field_info.bit_size;
2992
2993 if (this_field_info.bit_offset != last_field_end) {
2994 if (((last_field_end % character_width) == 0) || // case 1
2995 (this_field_info.bit_offset - last_field_end >=
2996 word_width)) // case 3
2997 {
2998 anon_field_info.bit_size =
2999 this_field_info.bit_offset % character_width;
3000 anon_field_info.bit_offset =
3001 this_field_info.bit_offset -
3002 anon_field_info.bit_size;
3003 } else // case 2
3004 {
3005 anon_field_info.bit_size =
3006 this_field_info.bit_offset - last_field_end;
3007 anon_field_info.bit_offset = last_field_end;
3008 }
3009 }
3010 }
3011
3012 if (anon_field_info.IsValid()) {
3013 clang::FieldDecl *unnamed_bitfield_decl =
3014 ClangASTContext::AddFieldToRecordType(
3015 class_clang_type, NULL__null,
3016 m_ast.GetBuiltinTypeForEncodingAndBitSize(
3017 eEncodingSint, word_width),
3018 accessibility, anon_field_info.bit_size);
3019
3020 layout_info.field_offsets.insert(std::make_pair(
3021 unnamed_bitfield_decl, anon_field_info.bit_offset));
3022 }
3023 }
3024 last_field_info = this_field_info;
3025 } else {
3026 last_field_info.Clear();
3027 }
3028
3029 CompilerType member_clang_type =
3030 member_type->GetLayoutCompilerType();
3031 if (!member_clang_type.IsCompleteType())
3032 member_clang_type.GetCompleteType();
3033
3034 {
3035 // Older versions of clang emit array[0] and array[1] in the
3036 // same way (<rdar://problem/12566646>).
3037 // If the current field is at the end of the structure, then
3038 // there is definitely no room for extra
3039 // elements and we override the type to array[0].
3040
3041 CompilerType member_array_element_type;
3042 uint64_t member_array_size;
3043 bool member_array_is_incomplete;
3044
3045 if (member_clang_type.IsArrayType(
3046 &member_array_element_type, &member_array_size,
3047 &member_array_is_incomplete) &&
3048 !member_array_is_incomplete) {
3049 uint64_t parent_byte_size =
3050 parent_die.GetAttributeValueAsUnsigned(DW_AT_byte_size,
3051 UINT64_MAX(18446744073709551615UL));
3052
3053 if (member_byte_offset >= parent_byte_size) {
3054 if (member_array_size != 1 &&
3055 (member_array_size != 0 ||
3056 member_byte_offset > parent_byte_size)) {
3057 module_sp->ReportError(
3058 "0x%8.8" PRIx64"l" "x"
3059 ": DW_TAG_member '%s' refers to type 0x%8.8" PRIx64"l" "x"
3060 " which extends beyond the bounds of 0x%8.8" PRIx64"l" "x",
3061 die.GetID(), name, encoding_form.Reference(),
3062 parent_die.GetID());
3063 }
3064
3065 member_clang_type = m_ast.CreateArrayType(
3066 member_array_element_type, 0, false);
3067 }
3068 }
3069 }
3070
3071 if (ClangASTContext::IsCXXClassType(member_clang_type) &&
3072 member_clang_type.GetCompleteType() == false) {
3073 if (die.GetCU()->GetProducer() ==
3074 DWARFCompileUnit::eProducerClang)
3075 module_sp->ReportError(
3076 "DWARF DIE at 0x%8.8x (class %s) has a member variable "
3077 "0x%8.8x (%s) whose type is a forward declaration, not a "
3078 "complete definition.\nTry compiling the source file "
3079 "with -fno-limit-debug-info",
3080 parent_die.GetOffset(), parent_die.GetName(),
3081 die.GetOffset(), name);
3082 else
3083 module_sp->ReportError(
3084 "DWARF DIE at 0x%8.8x (class %s) has a member variable "
3085 "0x%8.8x (%s) whose type is a forward declaration, not a "
3086 "complete definition.\nPlease file a bug against the "
3087 "compiler and include the preprocessed output for %s",
3088 parent_die.GetOffset(), parent_die.GetName(),
3089 die.GetOffset(), name,
3090 sc.comp_unit ? sc.comp_unit->GetPath().c_str()
3091 : "the source file");
3092 // We have no choice other than to pretend that the member class
3093 // is complete. If we don't do this, clang will crash when
3094 // trying
3095 // to layout the class. Since we provide layout assistance, all
3096 // ivars in this class and other classes will be fine, this is
3097 // the best we can do short of crashing.
3098 if (ClangASTContext::StartTagDeclarationDefinition(
3099 member_clang_type)) {
3100 ClangASTContext::CompleteTagDeclarationDefinition(
3101 member_clang_type);
3102 } else {
3103 module_sp->ReportError(
3104 "DWARF DIE at 0x%8.8x (class %s) has a member variable "
3105 "0x%8.8x (%s) whose type claims to be a C++ class but we "
3106 "were not able to start its definition.\nPlease file a "
3107 "bug and attach the file at the start of this error "
3108 "message",
3109 parent_die.GetOffset(), parent_die.GetName(),
3110 die.GetOffset(), name);
3111 }
3112 }
3113
3114 field_decl = ClangASTContext::AddFieldToRecordType(
3115 class_clang_type, name, member_clang_type, accessibility,
3116 bit_size);
3117
3118 m_ast.SetMetadataAsUserID(field_decl, die.GetID());
3119
3120 layout_info.field_offsets.insert(
3121 std::make_pair(field_decl, field_bit_offset));
3122 } else {
3123 if (name)
3124 module_sp->ReportError(
3125 "0x%8.8" PRIx64"l" "x"
3126 ": DW_TAG_member '%s' refers to type 0x%8.8" PRIx64"l" "x"
3127 " which was unable to be parsed",
3128 die.GetID(), name, encoding_form.Reference());
3129 else
3130 module_sp->ReportError(
3131 "0x%8.8" PRIx64"l" "x"
3132 ": DW_TAG_member refers to type 0x%8.8" PRIx64"l" "x"
3133 " which was unable to be parsed",
3134 die.GetID(), encoding_form.Reference());
3135 }
3136 }
3137
3138 if (prop_name != NULL__null && member_type) {
3139 clang::ObjCIvarDecl *ivar_decl = NULL__null;
3140
3141 if (field_decl) {
3142 ivar_decl = clang::dyn_cast<clang::ObjCIvarDecl>(field_decl);
3143 assert(ivar_decl != NULL)((ivar_decl != __null) ? static_cast<void> (0) : __assert_fail
("ivar_decl != NULL", "/tmp/buildd/llvm-toolchain-snapshot-5.0~svn298304/tools/lldb/source/Plugins/SymbolFile/DWARF/DWARFASTParserClang.cpp"
, 3143, __PRETTY_FUNCTION__))
;
3144 }
3145
3146 ClangASTMetadata metadata;
3147 metadata.SetUserID(die.GetID());
3148 delayed_properties.push_back(DelayedAddObjCClassProperty(
3149 class_clang_type, prop_name,
3150 member_type->GetLayoutCompilerType(), ivar_decl,
3151 prop_setter_name, prop_getter_name, prop_attributes,
3152 &metadata));
3153
3154 if (ivar_decl)
3155 m_ast.SetMetadataAsUserID(ivar_decl, die.GetID());
3156 }
3157 }
3158 }
3159 ++member_idx;
3160 } break;
3161
3162 case DW_TAG_subprogram:
3163 // Let the type parsing code handle this one for us.
3164 member_function_dies.Append(die);
3165 break;
3166
3167 case DW_TAG_inheritance: {
3168 is_a_class = true;
3169 if (default_accessibility == eAccessNone)
3170 default_accessibility = eAccessPrivate;
3171 // TODO: implement DW_TAG_inheritance type parsing
3172 DWARFAttributes attributes;
3173 const size_t num_attributes = die.GetAttributes(attributes);
3174 if (num_attributes > 0) {
3175 Declaration decl;
3176 DWARFExpression location(die.GetCU());
3177 DWARFFormValue encoding_form;
3178 AccessType accessibility = default_accessibility;
3179 bool is_virtual = false;
3180 bool is_base_of_class = true;
3181 off_t member_byte_offset = 0;
3182 uint32_t i;
3183 for (i = 0; i < num_attributes; ++i) {
3184 const dw_attr_t attr = attributes.AttributeAtIndex(i);
3185 DWARFFormValue form_value;
3186 if (attributes.ExtractFormValueAtIndex(i, form_value)) {
3187 switch (attr) {
3188 case DW_AT_decl_file:
3189 decl.SetFile(sc.comp_unit->GetSupportFiles().GetFileSpecAtIndex(
3190 form_value.Unsigned()));
3191 break;
3192 case DW_AT_decl_line:
3193 decl.SetLine(form_value.Unsigned());
3194 break;
3195 case DW_AT_decl_column:
3196 decl.SetColumn(form_value.Unsigned());
3197 break;
3198 case DW_AT_type:
3199 encoding_form = form_value;
3200 break;
3201 case DW_AT_data_member_location:
3202 if (form_value.BlockData()) {
3203 Value initialValue(0);
3204 Value memberOffset(0);
3205 const DWARFDataExtractor &debug_info_data =
3206 die.GetDWARF()->get_debug_info_data();
3207 uint32_t block_length = form_value.Unsigned();
3208 uint32_t block_offset =
3209 form_value.BlockData() - debug_info_data.GetDataStart();
3210 if (DWARFExpression::Evaluate(
3211 nullptr, nullptr, nullptr, nullptr, module_sp,
3212 debug_info_data, die.GetCU(), block_offset,
3213 block_length, eRegisterKindDWARF, &initialValue,
3214 nullptr, memberOffset, nullptr)) {
3215 member_byte_offset = memberOffset.ResolveValue(NULL__null).UInt();
3216 }
3217 } else {
3218 // With DWARF 3 and later, if the value is an integer constant,
3219 // this form value is the offset in bytes from the beginning
3220 // of the containing entity.
3221 member_byte_offset = form_value.Unsigned();
3222 }
3223 break;
3224
3225 case DW_AT_accessibility:
3226 accessibility = DW_ACCESS_to_AccessType(form_value.Unsigned());
3227 break;
3228
3229 case DW_AT_virtuality:
3230 is_virtual = form_value.Boolean();
3231 break;
3232
3233 case DW_AT_sibling:
3234 break;
3235
3236 default:
3237 break;
3238 }
3239 }
3240 }
3241
3242 Type *base_class_type = die.ResolveTypeUID(DIERef(encoding_form));
3243 if (base_class_type == NULL__null) {
3244 module_sp->ReportError("0x%8.8x: DW_TAG_inheritance failed to "
3245 "resolve the base class at 0x%8.8" PRIx64"l" "x"
3246 " from enclosing type 0x%8.8x. \nPlease file "
3247 "a bug and attach the file at the start of "
3248 "this error message",
3249 die.GetOffset(), encoding_form.Reference(),
3250 parent_die.GetOffset());
3251 break;
3252 }
3253
3254 CompilerType base_class_clang_type =
3255 base_class_type->GetFullCompilerType();
3256 assert(base_class_clang_type)((base_class_clang_type) ? static_cast<void> (0) : __assert_fail
("base_class_clang_type", "/tmp/buildd/llvm-toolchain-snapshot-5.0~svn298304/tools/lldb/source/Plugins/SymbolFile/DWARF/DWARFASTParserClang.cpp"
, 3256, __PRETTY_FUNCTION__))
;
3257 if (class_language == eLanguageTypeObjC) {
3258 ast->SetObjCSuperClass(class_clang_type, base_class_clang_type);
3259 } else {
3260 base_classes.push_back(ast->CreateBaseClassSpecifier(
3261 base_class_clang_type.GetOpaqueQualType(), accessibility,
3262 is_virtual, is_base_of_class));
3263
3264 if (is_virtual) {
3265 // Do not specify any offset for virtual inheritance. The DWARF
3266 // produced by clang doesn't
3267 // give us a constant offset, but gives us a DWARF expressions that
3268 // requires an actual object
3269 // in memory. the DW_AT_data_member_location for a virtual base
3270 // class looks like:
3271 // DW_AT_data_member_location( DW_OP_dup, DW_OP_deref,
3272 // DW_OP_constu(0x00000018), DW_OP_minus, DW_OP_deref,
3273 // DW_OP_plus )
3274 // Given this, there is really no valid response we can give to
3275 // clang for virtual base
3276 // class offsets, and this should eventually be removed from
3277 // LayoutRecordType() in the external
3278 // AST source in clang.
3279 } else {
3280 layout_info.base_offsets.insert(std::make_pair(
3281 ast->GetAsCXXRecordDecl(
3282 base_class_clang_type.GetOpaqueQualType()),
3283 clang::CharUnits::fromQuantity(member_byte_offset)));
3284 }
3285 }
3286 }
3287 } break;
3288
3289 default:
3290 break;
3291 }
3292 }
3293
3294 return true;
3295}
3296
3297size_t DWARFASTParserClang::ParseChildParameters(
3298 const SymbolContext &sc, clang::DeclContext *containing_decl_ctx,
3299 const DWARFDIE &parent_die, bool skip_artificial, bool &is_static,
3300 bool &is_variadic, bool &has_template_params,
3301 std::vector<CompilerType> &function_param_types,
3302 std::vector<clang::ParmVarDecl *> &function_param_decls,
3303 unsigned &type_quals) {
3304 if (!parent_die)
3305 return 0;
3306
3307 size_t arg_idx = 0;
3308 for (DWARFDIE die = parent_die.GetFirstChild(); die.IsValid();
3309 die = die.GetSibling()) {
3310 const dw_tag_t tag = die.Tag();
3311 switch (tag) {
3312 case DW_TAG_formal_parameter: {
3313 DWARFAttributes attributes;
3314 const size_t num_attributes = die.GetAttributes(attributes);
3315 if (num_attributes > 0) {
3316 const char *name = NULL__null;
3317 Declaration decl;
3318 DWARFFormValue param_type_die_form;
3319 bool is_artificial = false;
3320 // one of None, Auto, Register, Extern, Static, PrivateExtern
3321
3322 clang::StorageClass storage = clang::SC_None;
3323 uint32_t i;
3324 for (i = 0; i < num_attributes; ++i) {
3325 const dw_attr_t attr = attributes.AttributeAtIndex(i);
3326 DWARFFormValue form_value;
3327 if (attributes.ExtractFormValueAtIndex(i, form_value)) {
3328 switch (attr) {
3329 case DW_AT_decl_file:
3330 decl.SetFile(sc.comp_unit->GetSupportFiles().GetFileSpecAtIndex(
3331 form_value.Unsigned()));
3332 break;
3333 case DW_AT_decl_line:
3334 decl.SetLine(form_value.Unsigned());
3335 break;
3336 case DW_AT_decl_column:
3337 decl.SetColumn(form_value.Unsigned());
3338 break;
3339 case DW_AT_name:
3340 name = form_value.AsCString();
3341 break;
3342 case DW_AT_type:
3343 param_type_die_form = form_value;
3344 break;
3345 case DW_AT_artificial:
3346 is_artificial = form_value.Boolean();
3347 break;
3348 case DW_AT_location:
3349 // if (form_value.BlockData())
3350 // {
3351 // const DWARFDataExtractor&
3352 // debug_info_data = debug_info();
3353 // uint32_t block_length =
3354 // form_value.Unsigned();
3355 // DWARFDataExtractor
3356 // location(debug_info_data,
3357 // form_value.BlockData() -
3358 // debug_info_data.GetDataStart(),
3359 // block_length);
3360 // }
3361 // else
3362 // {
3363 // }
3364 // break;
3365 case DW_AT_const_value:
3366 case DW_AT_default_value:
3367 case DW_AT_description:
3368 case DW_AT_endianity:
3369 case DW_AT_is_optional:
3370 case DW_AT_segment:
3371 case DW_AT_variable_parameter:
3372 default:
3373 case DW_AT_abstract_origin:
3374 case DW_AT_sibling:
3375 break;
3376 }
3377 }
3378 }
3379
3380 bool skip = false;
3381 if (skip_artificial) {
3382 if (is_artificial) {
3383 // In order to determine if a C++ member function is
3384 // "const" we have to look at the const-ness of "this"...
3385 // Ugly, but that
3386 if (arg_idx == 0) {
3387 if (DeclKindIsCXXClass(containing_decl_ctx->getDeclKind())) {
3388 // Often times compilers omit the "this" name for the
3389 // specification DIEs, so we can't rely upon the name
3390 // being in the formal parameter DIE...
3391 if (name == NULL__null || ::strcmp(name, "this") == 0) {
3392 Type *this_type =
3393 die.ResolveTypeUID(DIERef(param_type_die_form));
3394 if (this_type) {
3395 uint32_t encoding_mask = this_type->GetEncodingMask();
3396 if (encoding_mask & Type::eEncodingIsPointerUID) {
3397 is_static = false;
3398
3399 if (encoding_mask & (1u << Type::eEncodingIsConstUID))
3400 type_quals |= clang::Qualifiers::Const;
3401 if (encoding_mask & (1u << Type::eEncodingIsVolatileUID))
3402 type_quals |= clang::Qualifiers::Volatile;
3403 }
3404 }
3405 }
3406 }
3407 }
3408 skip = true;
3409 } else {
3410
3411 // HACK: Objective C formal parameters "self" and "_cmd"
3412 // are not marked as artificial in the DWARF...
3413 CompileUnit *comp_unit = die.GetLLDBCompileUnit();
3414 if (comp_unit) {
3415 switch (comp_unit->GetLanguage()) {
3416 case eLanguageTypeObjC:
3417 case eLanguageTypeObjC_plus_plus:
3418 if (name && name[0] &&
3419 (strcmp(name, "self") == 0 || strcmp(name, "_cmd") == 0))
3420 skip = true;
3421 break;
3422 default:
3423 break;
3424 }
3425 }
3426 }
3427 }
3428
3429 if (!skip) {
3430 Type *type = die.ResolveTypeUID(DIERef(param_type_die_form));
3431 if (type) {
3432 function_param_types.push_back(type->GetForwardCompilerType());
3433
3434 clang::ParmVarDecl *param_var_decl =
3435 m_ast.CreateParameterDeclaration(
3436 name, type->GetForwardCompilerType(), storage);
3437 assert(param_var_decl)((param_var_decl) ? static_cast<void> (0) : __assert_fail
("param_var_decl", "/tmp/buildd/llvm-toolchain-snapshot-5.0~svn298304/tools/lldb/source/Plugins/SymbolFile/DWARF/DWARFASTParserClang.cpp"
, 3437, __PRETTY_FUNCTION__))
;
3438 function_param_decls.push_back(param_var_decl);
3439
3440 m_ast.SetMetadataAsUserID(param_var_decl, die.GetID());
3441 }
3442 }
3443 }
3444 arg_idx++;
3445 } break;
3446
3447 case DW_TAG_unspecified_parameters:
3448 is_variadic = true;
3449 break;
3450
3451 case DW_TAG_template_type_parameter:
3452 case DW_TAG_template_value_parameter:
3453 // The one caller of this was never using the template_param_infos,
3454 // and the local variable was taking up a large amount of stack space
3455 // in SymbolFileDWARF::ParseType() so this was removed. If we ever need
3456 // the template params back, we can add them back.
3457 // ParseTemplateDIE (dwarf_cu, die, template_param_infos);
3458 has_template_params = true;
3459 break;
3460
3461 default:
3462 break;
3463 }
3464 }
3465 return arg_idx;
3466}
3467
3468void DWARFASTParserClang::ParseChildArrayInfo(
3469 const SymbolContext &sc, const DWARFDIE &parent_die, int64_t &first_index,
3470 std::vector<uint64_t> &element_orders, uint32_t &byte_stride,
3471 uint32_t &bit_stride) {
3472 if (!parent_die)
3473 return;
3474
3475 for (DWARFDIE die = parent_die.GetFirstChild(); die.IsValid();
3476 die = die.GetSibling()) {
3477 const dw_tag_t tag = die.Tag();
3478 switch (tag) {
3479 case DW_TAG_subrange_type: {
3480 DWARFAttributes attributes;
3481 const size_t num_child_attributes = die.GetAttributes(attributes);
3482 if (num_child_attributes > 0) {
3483 uint64_t num_elements = 0;
3484 uint64_t lower_bound = 0;
3485 uint64_t upper_bound = 0;
3486 bool upper_bound_valid = false;
3487 uint32_t i;
3488 for (i = 0; i < num_child_attributes; ++i) {
3489 const dw_attr_t attr = attributes.AttributeAtIndex(i);
3490 DWARFFormValue form_value;
3491 if (attributes.ExtractFormValueAtIndex(i, form_value)) {
3492 switch (attr) {
3493 case DW_AT_name:
3494 break;
3495
3496 case DW_AT_count:
3497 num_elements = form_value.Unsigned();
3498 break;
3499
3500 case DW_AT_bit_stride:
3501 bit_stride = form_value.Unsigned();
3502 break;
3503
3504 case DW_AT_byte_stride:
3505 byte_stride = form_value.Unsigned();
3506 break;
3507
3508 case DW_AT_lower_bound:
3509 lower_bound = form_value.Unsigned();
3510 break;
3511
3512 case DW_AT_upper_bound:
3513 upper_bound_valid = true;
3514 upper_bound = form_value.Unsigned();
3515 break;
3516
3517 default:
3518 case DW_AT_abstract_origin:
3519 case DW_AT_accessibility:
3520 case DW_AT_allocated:
3521 case DW_AT_associated:
3522 case DW_AT_data_location:
3523 case DW_AT_declaration:
3524 case DW_AT_description:
3525 case DW_AT_sibling:
3526 case DW_AT_threads_scaled:
3527 case DW_AT_type:
3528 case DW_AT_visibility:
3529 break;
3530 }
3531 }
3532 }
3533
3534 if (num_elements == 0) {
3535 if (upper_bound_valid && upper_bound >= lower_bound)
3536 num_elements = upper_bound - lower_bound + 1;
3537 }
3538
3539 element_orders.push_back(num_elements);
3540 }
3541 } break;
3542 }
3543 }
3544}
3545
3546Type *DWARFASTParserClang::GetTypeForDIE(const DWARFDIE &die) {
3547 if (die) {
3548 SymbolFileDWARF *dwarf = die.GetDWARF();
3549 DWARFAttributes attributes;
3550 const size_t num_attributes = die.GetAttributes(attributes);
3551 if (num_attributes > 0) {
3552 DWARFFormValue type_die_form;
3553 for (size_t i = 0; i < num_attributes; ++i) {
3554 dw_attr_t attr = attributes.AttributeAtIndex(i);
3555 DWARFFormValue form_value;
3556
3557 if (attr == DW_AT_type &&
3558 attributes.ExtractFormValueAtIndex(i, form_value))
3559 return dwarf->ResolveTypeUID(dwarf->GetDIE(DIERef(form_value)), true);
3560 }
3561 }
3562 }
3563
3564 return nullptr;
3565}
3566
3567clang::Decl *DWARFASTParserClang::GetClangDeclForDIE(const DWARFDIE &die) {
3568 if (!die)
3569 return nullptr;
3570
3571 switch (die.Tag()) {
3572 case DW_TAG_variable:
3573 case DW_TAG_constant:
3574 case DW_TAG_formal_parameter:
3575 case DW_TAG_imported_declaration:
3576 case DW_TAG_imported_module:
3577 break;
3578 default:
3579 return nullptr;
3580 }
3581
3582 DIEToDeclMap::iterator cache_pos = m_die_to_decl.find(die.GetDIE());
3583 if (cache_pos != m_die_to_decl.end())
3584 return cache_pos->second;
3585
3586 if (DWARFDIE spec_die = die.GetReferencedDIE(DW_AT_specification)) {
3587 clang::Decl *decl = GetClangDeclForDIE(spec_die);
3588 m_die_to_decl[die.GetDIE()] = decl;
3589 m_decl_to_die[decl].insert(die.GetDIE());
3590 return decl;
3591 }
3592
3593 if (DWARFDIE abstract_origin_die =
3594 die.GetReferencedDIE(DW_AT_abstract_origin)) {
3595 clang::Decl *decl = GetClangDeclForDIE(abstract_origin_die);
3596 m_die_to_decl[die.GetDIE()] = decl;
3597 m_decl_to_die[decl].insert(die.GetDIE());
3598 return decl;
3599 }
3600
3601 clang::Decl *decl = nullptr;
3602 switch (die.Tag()) {
3603 case DW_TAG_variable:
3604 case DW_TAG_constant:
3605 case DW_TAG_formal_parameter: {
3606 SymbolFileDWARF *dwarf = die.GetDWARF();
3607 Type *type = GetTypeForDIE(die);
3608 if (dwarf && type) {
3609 const char *name = die.GetName();
3610 clang::DeclContext *decl_context =
3611 ClangASTContext::DeclContextGetAsDeclContext(
3612 dwarf->GetDeclContextContainingUID(die.GetID()));
3613 decl = m_ast.CreateVariableDeclaration(
3614 decl_context, name,
3615 ClangUtil::GetQualType(type->GetForwardCompilerType()));
3616 }
3617 break;
3618 }
3619 case DW_TAG_imported_declaration: {
3620 SymbolFileDWARF *dwarf = die.GetDWARF();
3621 DWARFDIE imported_uid = die.GetAttributeValueAsReferenceDIE(DW_AT_import);
3622 if (imported_uid) {
3623 CompilerDecl imported_decl = imported_uid.GetDecl();
3624 if (imported_decl) {
3625 clang::DeclContext *decl_context =
3626 ClangASTContext::DeclContextGetAsDeclContext(
3627 dwarf->GetDeclContextContainingUID(die.GetID()));
3628 if (clang::NamedDecl *clang_imported_decl =
3629 llvm::dyn_cast<clang::NamedDecl>(
3630 (clang::Decl *)imported_decl.GetOpaqueDecl()))
3631 decl =
3632 m_ast.CreateUsingDeclaration(decl_context, clang_imported_decl);
3633 }
3634 }
3635 break;
3636 }
3637 case DW_TAG_imported_module: {
3638 SymbolFileDWARF *dwarf = die.GetDWARF();
3639 DWARFDIE imported_uid = die.GetAttributeValueAsReferenceDIE(DW_AT_import);
3640
3641 if (imported_uid) {
3642 CompilerDeclContext imported_decl_ctx = imported_uid.GetDeclContext();
3643 if (imported_decl_ctx) {
3644 clang::DeclContext *decl_context =
3645 ClangASTContext::DeclContextGetAsDeclContext(
3646 dwarf->GetDeclContextContainingUID(die.GetID()));
3647 if (clang::NamespaceDecl *ns_decl =
3648 ClangASTContext::DeclContextGetAsNamespaceDecl(
3649 imported_decl_ctx))
3650 decl = m_ast.CreateUsingDirectiveDeclaration(decl_context, ns_decl);
3651 }
3652 }
3653 break;
3654 }
3655 default:
3656 break;
3657 }
3658
3659 m_die_to_decl[die.GetDIE()] = decl;
3660 m_decl_to_die[decl].insert(die.GetDIE());
3661
3662 return decl;
3663}
3664
3665clang::DeclContext *
3666DWARFASTParserClang::GetClangDeclContextForDIE(const DWARFDIE &die) {
3667 if (die) {
3668 clang::DeclContext *decl_ctx = GetCachedClangDeclContextForDIE(die);
3669 if (decl_ctx)
3670 return decl_ctx;
3671
3672 bool try_parsing_type = true;
3673 switch (die.Tag()) {
3674 case DW_TAG_compile_unit:
3675 decl_ctx = m_ast.GetTranslationUnitDecl();
3676 try_parsing_type = false;
3677 break;
3678
3679 case DW_TAG_namespace:
3680 decl_ctx = ResolveNamespaceDIE(die);
3681 try_parsing_type = false;
3682 break;
3683
3684 case DW_TAG_lexical_block:
3685 decl_ctx = (clang::DeclContext *)ResolveBlockDIE(die);
3686 try_parsing_type = false;
3687 break;
3688
3689 default:
3690 break;
3691 }
3692
3693 if (decl_ctx == nullptr && try_parsing_type) {
3694 Type *type = die.GetDWARF()->ResolveType(die);
3695 if (type)
3696 decl_ctx = GetCachedClangDeclContextForDIE(die);
3697 }
3698
3699 if (decl_ctx) {
3700 LinkDeclContextToDIE(decl_ctx, die);
3701 return decl_ctx;
3702 }
3703 }
3704 return nullptr;
3705}
3706
3707clang::BlockDecl *DWARFASTParserClang::ResolveBlockDIE(const DWARFDIE &die) {
3708 if (die && die.Tag() == DW_TAG_lexical_block) {
3709 clang::BlockDecl *decl =
3710 llvm::cast_or_null<clang::BlockDecl>(m_die_to_decl_ctx[die.GetDIE()]);
3711
3712 if (!decl) {
3713 DWARFDIE decl_context_die;
3714 clang::DeclContext *decl_context =
3715 GetClangDeclContextContainingDIE(die, &decl_context_die);
3716 decl = m_ast.CreateBlockDeclaration(decl_context);
3717
3718 if (decl)
3719 LinkDeclContextToDIE((clang::DeclContext *)decl, die);
3720 }
3721
3722 return decl;
3723 }
3724 return nullptr;
3725}
3726
3727clang::NamespaceDecl *
3728DWARFASTParserClang::ResolveNamespaceDIE(const DWARFDIE &die) {
3729 if (die && die.Tag() == DW_TAG_namespace) {
3730 // See if we already parsed this namespace DIE and associated it with a
3731 // uniqued namespace declaration
3732 clang::NamespaceDecl *namespace_decl =
3733 static_cast<clang::NamespaceDecl *>(m_die_to_decl_ctx[die.GetDIE()]);
3734 if (namespace_decl)
3735 return namespace_decl;
3736 else {
3737 const char *namespace_name = die.GetName();
3738 clang::DeclContext *containing_decl_ctx =
3739 GetClangDeclContextContainingDIE(die, nullptr);
3740 namespace_decl = m_ast.GetUniqueNamespaceDeclaration(namespace_name,
3741 containing_decl_ctx);
3742 Log *log =
3743 nullptr; // (LogChannelDWARF::GetLogIfAll(DWARF_LOG_DEBUG_INFO));
3744 if (log) {
3745 SymbolFileDWARF *dwarf = die.GetDWARF();
3746 if (namespace_name) {
3747 dwarf->GetObjectFile()->GetModule()->LogMessage(
3748 log, "ASTContext => %p: 0x%8.8" PRIx64"l" "x"
3749 ": DW_TAG_namespace with DW_AT_name(\"%s\") => "
3750 "clang::NamespaceDecl *%p (original = %p)",
3751 static_cast<void *>(m_ast.getASTContext()), die.GetID(),
3752 namespace_name, static_cast<void *>(namespace_decl),
3753 static_cast<void *>(namespace_decl->getOriginalNamespace()));
3754 } else {
3755 dwarf->GetObjectFile()->GetModule()->LogMessage(
3756 log, "ASTContext => %p: 0x%8.8" PRIx64"l" "x"
3757 ": DW_TAG_namespace (anonymous) => clang::NamespaceDecl *%p "
3758 "(original = %p)",
3759 static_cast<void *>(m_ast.getASTContext()), die.GetID(),
3760 static_cast<void *>(namespace_decl),
3761 static_cast<void *>(namespace_decl->getOriginalNamespace()));
3762 }
3763 }
3764
3765 if (namespace_decl)
3766 LinkDeclContextToDIE((clang::DeclContext *)namespace_decl, die);
3767 return namespace_decl;
3768 }
3769 }
3770 return nullptr;
3771}
3772
3773clang::DeclContext *DWARFASTParserClang::GetClangDeclContextContainingDIE(
3774 const DWARFDIE &die, DWARFDIE *decl_ctx_die_copy) {
3775 SymbolFileDWARF *dwarf = die.GetDWARF();
3776
3777 DWARFDIE decl_ctx_die = dwarf->GetDeclContextDIEContainingDIE(die);
3778
3779 if (decl_ctx_die_copy)
3780 *decl_ctx_die_copy = decl_ctx_die;
3781
3782 if (decl_ctx_die) {
3783 clang::DeclContext *clang_decl_ctx =
3784 GetClangDeclContextForDIE(decl_ctx_die);
3785 if (clang_decl_ctx)
3786 return clang_decl_ctx;
3787 }
3788 return m_ast.GetTranslationUnitDecl();
3789}
3790
3791clang::DeclContext *
3792DWARFASTParserClang::GetCachedClangDeclContextForDIE(const DWARFDIE &die) {
3793 if (die) {
3794 DIEToDeclContextMap::iterator pos = m_die_to_decl_ctx.find(die.GetDIE());
3795 if (pos != m_die_to_decl_ctx.end())
3796 return pos->second;
3797 }
3798 return nullptr;
3799}
3800
3801void DWARFASTParserClang::LinkDeclContextToDIE(clang::DeclContext *decl_ctx,
3802 const DWARFDIE &die) {
3803 m_die_to_decl_ctx[die.GetDIE()] = decl_ctx;
3804 // There can be many DIEs for a single decl context
3805 // m_decl_ctx_to_die[decl_ctx].insert(die.GetDIE());
3806 m_decl_ctx_to_die.insert(std::make_pair(decl_ctx, die));
3807}
3808
3809bool DWARFASTParserClang::CopyUniqueClassMethodTypes(
3810 const DWARFDIE &src_class_die, const DWARFDIE &dst_class_die,
3811 lldb_private::Type *class_type, DWARFDIECollection &failures) {
3812 if (!class_type || !src_class_die || !dst_class_die)
3813 return false;
3814 if (src_class_die.Tag() != dst_class_die.Tag())
3815 return false;
3816
3817 // We need to complete the class type so we can get all of the method types
3818 // parsed so we can then unique those types to their equivalent counterparts
3819 // in "dst_cu" and "dst_class_die"
3820 class_type->GetFullCompilerType();
3821
3822 DWARFDIE src_die;
3823 DWARFDIE dst_die;
3824 UniqueCStringMap<DWARFDIE> src_name_to_die;
3825 UniqueCStringMap<DWARFDIE> dst_name_to_die;
3826 UniqueCStringMap<DWARFDIE> src_name_to_die_artificial;
3827 UniqueCStringMap<DWARFDIE> dst_name_to_die_artificial;
3828 for (src_die = src_class_die.GetFirstChild(); src_die.IsValid();
3829 src_die = src_die.GetSibling()) {
3830 if (src_die.Tag() == DW_TAG_subprogram) {
3831 // Make sure this is a declaration and not a concrete instance by looking
3832 // for DW_AT_declaration set to 1. Sometimes concrete function instances
3833 // are placed inside the class definitions and shouldn't be included in
3834 // the list of things are are tracking here.
3835 if (src_die.GetAttributeValueAsUnsigned(DW_AT_declaration, 0) == 1) {
3836 const char *src_name = src_die.GetMangledName();
3837 if (src_name) {
3838 ConstString src_const_name(src_name);
3839 if (src_die.GetAttributeValueAsUnsigned(DW_AT_artificial, 0))
3840 src_name_to_die_artificial.Append(src_const_name.GetStringRef(),
3841 src_die);
3842 else
3843 src_name_to_die.Append(src_const_name.GetStringRef(), src_die);
3844 }
3845 }
3846 }
3847 }
3848 for (dst_die = dst_class_die.GetFirstChild(); dst_die.IsValid();
3849 dst_die = dst_die.GetSibling()) {
3850 if (dst_die.Tag() == DW_TAG_subprogram) {
3851 // Make sure this is a declaration and not a concrete instance by looking
3852 // for DW_AT_declaration set to 1. Sometimes concrete function instances
3853 // are placed inside the class definitions and shouldn't be included in
3854 // the list of things are are tracking here.
3855 if (dst_die.GetAttributeValueAsUnsigned(DW_AT_declaration, 0) == 1) {
3856 const char *dst_name = dst_die.GetMangledName();
3857 if (dst_name) {
3858 ConstString dst_const_name(dst_name);
3859 if (dst_die.GetAttributeValueAsUnsigned(DW_AT_artificial, 0))
3860 dst_name_to_die_artificial.Append(dst_const_name.GetStringRef(),
3861 dst_die);
3862 else
3863 dst_name_to_die.Append(dst_const_name.GetStringRef(), dst_die);
3864 }
3865 }
3866 }
3867 }
3868 const uint32_t src_size = src_name_to_die.GetSize();
3869 const uint32_t dst_size = dst_name_to_die.GetSize();
3870 Log *log = nullptr; // (LogChannelDWARF::GetLogIfAny(DWARF_LOG_DEBUG_INFO |
3871 // DWARF_LOG_TYPE_COMPLETION));
3872
3873 // Is everything kosher so we can go through the members at top speed?
3874 bool fast_path = true;
3875
3876 if (src_size != dst_size) {
3877 if (src_size != 0 && dst_size != 0) {
3878 if (log)
3879 log->Printf("warning: trying to unique class DIE 0x%8.8x to 0x%8.8x, "
3880 "but they didn't have the same size (src=%d, dst=%d)",
3881 src_class_die.GetOffset(), dst_class_die.GetOffset(),
3882 src_size, dst_size);
3883 }
3884
3885 fast_path = false;
3886 }
3887
3888 uint32_t idx;
3889
3890 if (fast_path) {
3891 for (idx = 0; idx < src_size; ++idx) {
3892 src_die = src_name_to_die.GetValueAtIndexUnchecked(idx);
3893 dst_die = dst_name_to_die.GetValueAtIndexUnchecked(idx);
3894
3895 if (src_die.Tag() != dst_die.Tag()) {
3896 if (log)
3897 log->Printf("warning: tried to unique class DIE 0x%8.8x to 0x%8.8x, "
3898 "but 0x%8.8x (%s) tags didn't match 0x%8.8x (%s)",
3899 src_class_die.GetOffset(), dst_class_die.GetOffset(),
3900 src_die.GetOffset(), src_die.GetTagAsCString(),
3901 dst_die.GetOffset(), dst_die.GetTagAsCString());
3902 fast_path = false;
3903 }
3904
3905 const char *src_name = src_die.GetMangledName();
3906 const char *dst_name = dst_die.GetMangledName();
3907
3908 // Make sure the names match
3909 if (src_name == dst_name || (strcmp(src_name, dst_name) == 0))
3910 continue;
3911
3912 if (log)
3913 log->Printf("warning: tried to unique class DIE 0x%8.8x to 0x%8.8x, "
3914 "but 0x%8.8x (%s) names didn't match 0x%8.8x (%s)",
3915 src_class_die.GetOffset(), dst_class_die.GetOffset(),
3916 src_die.GetOffset(), src_name, dst_die.GetOffset(),
3917 dst_name);
3918
3919 fast_path = false;
3920 }
3921 }
3922
3923 DWARFASTParserClang *src_dwarf_ast_parser =
3924 (DWARFASTParserClang *)src_die.GetDWARFParser();
3925 DWARFASTParserClang *dst_dwarf_ast_parser =
3926 (DWARFASTParserClang *)dst_die.GetDWARFParser();
3927
3928 // Now do the work of linking the DeclContexts and Types.
3929 if (fast_path) {
3930 // We can do this quickly. Just run across the tables index-for-index since
3931 // we know each node has matching names and tags.
3932 for (idx = 0; idx < src_size; ++idx) {
3933 src_die = src_name_to_die.GetValueAtIndexUnchecked(idx);
3934 dst_die = dst_name_to_die.GetValueAtIndexUnchecked(idx);
3935
3936 clang::DeclContext *src_decl_ctx =
3937 src_dwarf_ast_parser->m_die_to_decl_ctx[src_die.GetDIE()];
3938 if (src_decl_ctx) {
3939 if (log)
3940 log->Printf("uniquing decl context %p from 0x%8.8x for 0x%8.8x",
3941 static_cast<void *>(src_decl_ctx), src_die.GetOffset(),
3942 dst_die.GetOffset());
3943 dst_dwarf_ast_parser->LinkDeclContextToDIE(src_decl_ctx, dst_die);
3944 } else {
3945 if (log)
3946 log->Printf("warning: tried to unique decl context from 0x%8.8x for "
3947 "0x%8.8x, but none was found",
3948 src_die.GetOffset(), dst_die.GetOffset());
3949 }
3950
3951 Type *src_child_type =
3952 dst_die.GetDWARF()->GetDIEToType()[src_die.GetDIE()];
3953 if (src_child_type) {
3954 if (log)
3955 log->Printf(
3956 "uniquing type %p (uid=0x%" PRIx64"l" "x" ") from 0x%8.8x for 0x%8.8x",
3957 static_cast<void *>(src_child_type), src_child_type->GetID(),
3958 src_die.GetOffset(), dst_die.GetOffset());
3959 dst_die.GetDWARF()->GetDIEToType()[dst_die.GetDIE()] = src_child_type;
3960 } else {
3961 if (log)
3962 log->Printf("warning: tried to unique lldb_private::Type from "
3963 "0x%8.8x for 0x%8.8x, but none was found",
3964 src_die.GetOffset(), dst_die.GetOffset());
3965 }
3966 }
3967 } else {
3968 // We must do this slowly. For each member of the destination, look
3969 // up a member in the source with the same name, check its tag, and
3970 // unique them if everything matches up. Report failures.
3971
3972 if (!src_name_to_die.IsEmpty() && !dst_name_to_die.IsEmpty()) {
3973 src_name_to_die.Sort();
3974
3975 for (idx = 0; idx < dst_size; ++idx) {
3976 llvm::StringRef dst_name = dst_name_to_die.GetCStringAtIndex(idx);
3977 dst_die = dst_name_to_die.GetValueAtIndexUnchecked(idx);
3978 src_die = src_name_to_die.Find(dst_name, DWARFDIE());
3979
3980 if (src_die && (src_die.Tag() == dst_die.Tag())) {
3981 clang::DeclContext *src_decl_ctx =
3982 src_dwarf_ast_parser->m_die_to_decl_ctx[src_die.GetDIE()];
3983 if (src_decl_ctx) {
3984 if (log)
3985 log->Printf("uniquing decl context %p from 0x%8.8x for 0x%8.8x",
3986 static_cast<void *>(src_decl_ctx),
3987 src_die.GetOffset(), dst_die.GetOffset());
3988 dst_dwarf_ast_parser->LinkDeclContextToDIE(src_decl_ctx, dst_die);
3989 } else {
3990 if (log)
3991 log->Printf("warning: tried to unique decl context from 0x%8.8x "
3992 "for 0x%8.8x, but none was found",
3993 src_die.GetOffset(), dst_die.GetOffset());
3994 }
3995
3996 Type *src_child_type =
3997 dst_die.GetDWARF()->GetDIEToType()[src_die.GetDIE()];
3998 if (src_child_type) {
3999 if (log)
4000 log->Printf("uniquing type %p (uid=0x%" PRIx64"l" "x"
4001 ") from 0x%8.8x for 0x%8.8x",
4002 static_cast<void *>(src_child_type),
4003 src_child_type->GetID(), src_die.GetOffset(),
4004 dst_die.GetOffset());
4005 dst_die.GetDWARF()->GetDIEToType()[dst_die.GetDIE()] =
4006 src_child_type;
4007 } else {
4008 if (log)
4009 log->Printf("warning: tried to unique lldb_private::Type from "
4010 "0x%8.8x for 0x%8.8x, but none was found",
4011 src_die.GetOffset(), dst_die.GetOffset());
4012 }
4013 } else {
4014 if (log)
4015 log->Printf("warning: couldn't find a match for 0x%8.8x",
4016 dst_die.GetOffset());
4017
4018 failures.Append(dst_die);
4019 }
4020 }
4021 }
4022 }
4023
4024 const uint32_t src_size_artificial = src_name_to_die_artificial.GetSize();
4025 const uint32_t dst_size_artificial = dst_name_to_die_artificial.GetSize();
4026
4027 if (src_size_artificial && dst_size_artificial) {
4028 dst_name_to_die_artificial.Sort();
4029
4030 for (idx = 0; idx < src_size_artificial; ++idx) {
4031 llvm::StringRef src_name_artificial =
4032 src_name_to_die_artificial.GetCStringAtIndex(idx);
4033 src_die = src_name_to_die_artificial.GetValueAtIndexUnchecked(idx);
4034 dst_die =
4035 dst_name_to_die_artificial.Find(src_name_artificial, DWARFDIE());
4036
4037 if (dst_die) {
4038 // Both classes have the artificial types, link them
4039 clang::DeclContext *src_decl_ctx =
4040 src_dwarf_ast_parser->m_die_to_decl_ctx[src_die.GetDIE()];
4041 if (src_decl_ctx) {
4042 if (log)
4043 log->Printf("uniquing decl context %p from 0x%8.8x for 0x%8.8x",
4044 static_cast<void *>(src_decl_ctx), src_die.GetOffset(),
4045 dst_die.GetOffset());
4046 dst_dwarf_ast_parser->LinkDeclContextToDIE(src_decl_ctx, dst_die);
4047 } else {
4048 if (log)
4049 log->Printf("warning: tried to unique decl context from 0x%8.8x "
4050 "for 0x%8.8x, but none was found",
4051 src_die.GetOffset(), dst_die.GetOffset());
4052 }
4053
4054 Type *src_child_type =
4055 dst_die.GetDWARF()->GetDIEToType()[src_die.GetDIE()];
4056 if (src_child_type) {
4057 if (log)
4058 log->Printf(
4059 "uniquing type %p (uid=0x%" PRIx64"l" "x" ") from 0x%8.8x for 0x%8.8x",
4060 static_cast<void *>(src_child_type), src_child_type->GetID(),
4061 src_die.GetOffset(), dst_die.GetOffset());
4062 dst_die.GetDWARF()->GetDIEToType()[dst_die.GetDIE()] = src_child_type;
4063 } else {
4064 if (log)
4065 log->Printf("warning: tried to unique lldb_private::Type from "
4066 "0x%8.8x for 0x%8.8x, but none was found",
4067 src_die.GetOffset(), dst_die.GetOffset());
4068 }
4069 }
4070 }
4071 }
4072
4073 if (dst_size_artificial) {
4074 for (idx = 0; idx < dst_size_artificial; ++idx) {
4075 llvm::StringRef dst_name_artificial =
4076 dst_name_to_die_artificial.GetCStringAtIndex(idx);
4077 dst_die = dst_name_to_die_artificial.GetValueAtIndexUnchecked(idx);
4078 if (log)
4079 log->Printf("warning: need to create artificial method for 0x%8.8x for "
4080 "method '%s'",
4081 dst_die.GetOffset(), dst_name_artificial.str().c_str());
4082
4083 failures.Append(dst_die);
4084 }
4085 }
4086
4087 return (failures.Size() != 0);
4088}