1 //===-- Type.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 // C Includes
11 #include <stdio.h>
12 
13 // C++ Includes
14 // Other libraries and framework includes
15 // Project includes
16 #include "lldb/Core/DataBufferHeap.h"
17 #include "lldb/Core/DataExtractor.h"
18 #include "lldb/Core/Module.h"
19 #include "lldb/Core/Scalar.h"
20 #include "lldb/Core/StreamString.h"
21 
22 #include "lldb/Symbol/CompilerType.h"
23 #include "lldb/Symbol/ObjectFile.h"
24 #include "lldb/Symbol/SymbolContextScope.h"
25 #include "lldb/Symbol/SymbolFile.h"
26 #include "lldb/Symbol/SymbolVendor.h"
27 #include "lldb/Symbol/Type.h"
28 #include "lldb/Symbol/TypeList.h"
29 #include "lldb/Symbol/TypeSystem.h"
30 
31 #include "lldb/Target/ExecutionContext.h"
32 #include "lldb/Target/Process.h"
33 #include "lldb/Target/Target.h"
34 
35 #include "llvm/ADT/StringRef.h"
36 
37 #include "clang/AST/Decl.h"
38 #include "clang/AST/DeclObjC.h"
39 
40 using namespace lldb;
41 using namespace lldb_private;
42 
43 void CompilerContext::Dump() const {
44   switch (type) {
45   case CompilerContextKind::Invalid:
46     printf("Invalid");
47     break;
48   case CompilerContextKind::TranslationUnit:
49     printf("TranslationUnit");
50     break;
51   case CompilerContextKind::Module:
52     printf("Module");
53     break;
54   case CompilerContextKind::Namespace:
55     printf("Namespace");
56     break;
57   case CompilerContextKind::Class:
58     printf("Class");
59     break;
60   case CompilerContextKind::Structure:
61     printf("Structure");
62     break;
63   case CompilerContextKind::Union:
64     printf("Union");
65     break;
66   case CompilerContextKind::Function:
67     printf("Function");
68     break;
69   case CompilerContextKind::Variable:
70     printf("Variable");
71     break;
72   case CompilerContextKind::Enumeration:
73     printf("Enumeration");
74     break;
75   case CompilerContextKind::Typedef:
76     printf("Typedef");
77     break;
78   }
79   printf("(\"%s\")\n", name.GetCString());
80 }
81 
82 class TypeAppendVisitor {
83 public:
84   TypeAppendVisitor(TypeListImpl &type_list) : m_type_list(type_list) {}
85 
86   bool operator()(const lldb::TypeSP &type) {
87     m_type_list.Append(TypeImplSP(new TypeImpl(type)));
88     return true;
89   }
90 
91 private:
92   TypeListImpl &m_type_list;
93 };
94 
95 void TypeListImpl::Append(const lldb_private::TypeList &type_list) {
96   TypeAppendVisitor cb(*this);
97   type_list.ForEach(cb);
98 }
99 
100 SymbolFileType::SymbolFileType(SymbolFile &symbol_file,
101                                const lldb::TypeSP &type_sp)
102     : UserID(type_sp ? type_sp->GetID() : LLDB_INVALID_UID),
103       m_symbol_file(symbol_file), m_type_sp(type_sp) {}
104 
105 Type *SymbolFileType::GetType() {
106   if (!m_type_sp) {
107     Type *resolved_type = m_symbol_file.ResolveTypeUID(GetID());
108     if (resolved_type)
109       m_type_sp = resolved_type->shared_from_this();
110   }
111   return m_type_sp.get();
112 }
113 
114 Type::Type(lldb::user_id_t uid, SymbolFile *symbol_file,
115            const ConstString &name, uint64_t byte_size,
116            SymbolContextScope *context, user_id_t encoding_uid,
117            EncodingDataType encoding_uid_type, const Declaration &decl,
118            const CompilerType &compiler_type,
119            ResolveState compiler_type_resolve_state)
120     : std::enable_shared_from_this<Type>(), UserID(uid), m_name(name),
121       m_symbol_file(symbol_file), m_context(context), m_encoding_type(nullptr),
122       m_encoding_uid(encoding_uid), m_encoding_uid_type(encoding_uid_type),
123       m_byte_size(byte_size), m_decl(decl), m_compiler_type(compiler_type) {
124   m_flags.compiler_type_resolve_state =
125       (compiler_type ? compiler_type_resolve_state : eResolveStateUnresolved);
126   m_flags.is_complete_objc_class = false;
127 }
128 
129 Type::Type()
130     : std::enable_shared_from_this<Type>(), UserID(0), m_name("<INVALID TYPE>"),
131       m_symbol_file(nullptr), m_context(nullptr), m_encoding_type(nullptr),
132       m_encoding_uid(LLDB_INVALID_UID), m_encoding_uid_type(eEncodingInvalid),
133       m_byte_size(0), m_decl(), m_compiler_type() {
134   m_flags.compiler_type_resolve_state = eResolveStateUnresolved;
135   m_flags.is_complete_objc_class = false;
136 }
137 
138 Type::Type(const Type &rhs)
139     : std::enable_shared_from_this<Type>(rhs), UserID(rhs), m_name(rhs.m_name),
140       m_symbol_file(rhs.m_symbol_file), m_context(rhs.m_context),
141       m_encoding_type(rhs.m_encoding_type), m_encoding_uid(rhs.m_encoding_uid),
142       m_encoding_uid_type(rhs.m_encoding_uid_type),
143       m_byte_size(rhs.m_byte_size), m_decl(rhs.m_decl),
144       m_compiler_type(rhs.m_compiler_type), m_flags(rhs.m_flags) {}
145 
146 const Type &Type::operator=(const Type &rhs) {
147   if (this != &rhs) {
148   }
149   return *this;
150 }
151 
152 void Type::GetDescription(Stream *s, lldb::DescriptionLevel level,
153                           bool show_name) {
154   *s << "id = " << (const UserID &)*this;
155 
156   // Call the name accessor to make sure we resolve the type name
157   if (show_name) {
158     const ConstString &type_name = GetName();
159     if (type_name) {
160       *s << ", name = \"" << type_name << '"';
161       ConstString qualified_type_name(GetQualifiedName());
162       if (qualified_type_name != type_name) {
163         *s << ", qualified = \"" << qualified_type_name << '"';
164       }
165     }
166   }
167 
168   // Call the get byte size accesor so we resolve our byte size
169   if (GetByteSize())
170     s->Printf(", byte-size = %" PRIu64, m_byte_size);
171   bool show_fullpaths = (level == lldb::eDescriptionLevelVerbose);
172   m_decl.Dump(s, show_fullpaths);
173 
174   if (m_compiler_type.IsValid()) {
175     *s << ", compiler_type = \"";
176     GetForwardCompilerType().DumpTypeDescription(s);
177     *s << '"';
178   } else if (m_encoding_uid != LLDB_INVALID_UID) {
179     s->Printf(", type_uid = 0x%8.8" PRIx64, m_encoding_uid);
180     switch (m_encoding_uid_type) {
181     case eEncodingInvalid:
182       break;
183     case eEncodingIsUID:
184       s->PutCString(" (unresolved type)");
185       break;
186     case eEncodingIsConstUID:
187       s->PutCString(" (unresolved const type)");
188       break;
189     case eEncodingIsRestrictUID:
190       s->PutCString(" (unresolved restrict type)");
191       break;
192     case eEncodingIsVolatileUID:
193       s->PutCString(" (unresolved volatile type)");
194       break;
195     case eEncodingIsTypedefUID:
196       s->PutCString(" (unresolved typedef)");
197       break;
198     case eEncodingIsPointerUID:
199       s->PutCString(" (unresolved pointer)");
200       break;
201     case eEncodingIsLValueReferenceUID:
202       s->PutCString(" (unresolved L value reference)");
203       break;
204     case eEncodingIsRValueReferenceUID:
205       s->PutCString(" (unresolved R value reference)");
206       break;
207     case eEncodingIsSyntheticUID:
208       s->PutCString(" (synthetic type)");
209       break;
210     }
211   }
212 }
213 
214 void Type::Dump(Stream *s, bool show_context) {
215   s->Printf("%p: ", static_cast<void *>(this));
216   s->Indent();
217   *s << "Type" << static_cast<const UserID &>(*this) << ' ';
218   if (m_name)
219     *s << ", name = \"" << m_name << "\"";
220 
221   if (m_byte_size != 0)
222     s->Printf(", size = %" PRIu64, m_byte_size);
223 
224   if (show_context && m_context != nullptr) {
225     s->PutCString(", context = ( ");
226     m_context->DumpSymbolContext(s);
227     s->PutCString(" )");
228   }
229 
230   bool show_fullpaths = false;
231   m_decl.Dump(s, show_fullpaths);
232 
233   if (m_compiler_type.IsValid()) {
234     *s << ", compiler_type = " << m_compiler_type.GetOpaqueQualType() << ' ';
235     GetForwardCompilerType().DumpTypeDescription(s);
236   } else if (m_encoding_uid != LLDB_INVALID_UID) {
237     *s << ", type_data = " << (uint64_t)m_encoding_uid;
238     switch (m_encoding_uid_type) {
239     case eEncodingInvalid:
240       break;
241     case eEncodingIsUID:
242       s->PutCString(" (unresolved type)");
243       break;
244     case eEncodingIsConstUID:
245       s->PutCString(" (unresolved const type)");
246       break;
247     case eEncodingIsRestrictUID:
248       s->PutCString(" (unresolved restrict type)");
249       break;
250     case eEncodingIsVolatileUID:
251       s->PutCString(" (unresolved volatile type)");
252       break;
253     case eEncodingIsTypedefUID:
254       s->PutCString(" (unresolved typedef)");
255       break;
256     case eEncodingIsPointerUID:
257       s->PutCString(" (unresolved pointer)");
258       break;
259     case eEncodingIsLValueReferenceUID:
260       s->PutCString(" (unresolved L value reference)");
261       break;
262     case eEncodingIsRValueReferenceUID:
263       s->PutCString(" (unresolved R value reference)");
264       break;
265     case eEncodingIsSyntheticUID:
266       s->PutCString(" (synthetic type)");
267       break;
268     }
269   }
270 
271   //
272   //  if (m_access)
273   //      s->Printf(", access = %u", m_access);
274   s->EOL();
275 }
276 
277 const ConstString &Type::GetName() {
278   if (!m_name)
279     m_name = GetForwardCompilerType().GetConstTypeName();
280   return m_name;
281 }
282 
283 void Type::DumpTypeName(Stream *s) { GetName().Dump(s, "<invalid-type-name>"); }
284 
285 void Type::DumpValue(ExecutionContext *exe_ctx, Stream *s,
286                      const DataExtractor &data, uint32_t data_byte_offset,
287                      bool show_types, bool show_summary, bool verbose,
288                      lldb::Format format) {
289   if (ResolveClangType(eResolveStateForward)) {
290     if (show_types) {
291       s->PutChar('(');
292       if (verbose)
293         s->Printf("Type{0x%8.8" PRIx64 "} ", GetID());
294       DumpTypeName(s);
295       s->PutCString(") ");
296     }
297 
298     GetForwardCompilerType().DumpValue(
299         exe_ctx, s, format == lldb::eFormatDefault ? GetFormat() : format, data,
300         data_byte_offset, GetByteSize(),
301         0, // Bitfield bit size
302         0, // Bitfield bit offset
303         show_types, show_summary, verbose, 0);
304   }
305 }
306 
307 Type *Type::GetEncodingType() {
308   if (m_encoding_type == nullptr && m_encoding_uid != LLDB_INVALID_UID)
309     m_encoding_type = m_symbol_file->ResolveTypeUID(m_encoding_uid);
310   return m_encoding_type;
311 }
312 
313 uint64_t Type::GetByteSize() {
314   if (m_byte_size == 0) {
315     switch (m_encoding_uid_type) {
316     case eEncodingInvalid:
317     case eEncodingIsSyntheticUID:
318       break;
319     case eEncodingIsUID:
320     case eEncodingIsConstUID:
321     case eEncodingIsRestrictUID:
322     case eEncodingIsVolatileUID:
323     case eEncodingIsTypedefUID: {
324       Type *encoding_type = GetEncodingType();
325       if (encoding_type)
326         m_byte_size = encoding_type->GetByteSize();
327       if (m_byte_size == 0)
328         m_byte_size = GetLayoutCompilerType().GetByteSize(nullptr);
329     } break;
330 
331     // If we are a pointer or reference, then this is just a pointer size;
332     case eEncodingIsPointerUID:
333     case eEncodingIsLValueReferenceUID:
334     case eEncodingIsRValueReferenceUID: {
335       ArchSpec arch;
336       if (m_symbol_file->GetObjectFile()->GetArchitecture(arch))
337         m_byte_size = arch.GetAddressByteSize();
338     } break;
339     }
340   }
341   return m_byte_size;
342 }
343 
344 uint32_t Type::GetNumChildren(bool omit_empty_base_classes) {
345   return GetForwardCompilerType().GetNumChildren(omit_empty_base_classes);
346 }
347 
348 bool Type::IsAggregateType() {
349   return GetForwardCompilerType().IsAggregateType();
350 }
351 
352 lldb::TypeSP Type::GetTypedefType() {
353   lldb::TypeSP type_sp;
354   if (IsTypedef()) {
355     Type *typedef_type = m_symbol_file->ResolveTypeUID(m_encoding_uid);
356     if (typedef_type)
357       type_sp = typedef_type->shared_from_this();
358   }
359   return type_sp;
360 }
361 
362 lldb::Format Type::GetFormat() { return GetForwardCompilerType().GetFormat(); }
363 
364 lldb::Encoding Type::GetEncoding(uint64_t &count) {
365   // Make sure we resolve our type if it already hasn't been.
366   return GetForwardCompilerType().GetEncoding(count);
367 }
368 
369 bool Type::DumpValueInMemory(ExecutionContext *exe_ctx, Stream *s,
370                              lldb::addr_t address, AddressType address_type,
371                              bool show_types, bool show_summary, bool verbose) {
372   if (address != LLDB_INVALID_ADDRESS) {
373     DataExtractor data;
374     Target *target = nullptr;
375     if (exe_ctx)
376       target = exe_ctx->GetTargetPtr();
377     if (target)
378       data.SetByteOrder(target->GetArchitecture().GetByteOrder());
379     if (ReadFromMemory(exe_ctx, address, address_type, data)) {
380       DumpValue(exe_ctx, s, data, 0, show_types, show_summary, verbose);
381       return true;
382     }
383   }
384   return false;
385 }
386 
387 bool Type::ReadFromMemory(ExecutionContext *exe_ctx, lldb::addr_t addr,
388                           AddressType address_type, DataExtractor &data) {
389   if (address_type == eAddressTypeFile) {
390     // Can't convert a file address to anything valid without more
391     // context (which Module it came from)
392     return false;
393   }
394 
395   const uint64_t byte_size = GetByteSize();
396   if (data.GetByteSize() < byte_size) {
397     lldb::DataBufferSP data_sp(new DataBufferHeap(byte_size, '\0'));
398     data.SetData(data_sp);
399   }
400 
401   uint8_t *dst = const_cast<uint8_t *>(data.PeekData(0, byte_size));
402   if (dst != nullptr) {
403     if (address_type == eAddressTypeHost) {
404       // The address is an address in this process, so just copy it
405       if (addr == 0)
406         return false;
407       memcpy(dst, (uint8_t *)nullptr + addr, byte_size);
408       return true;
409     } else {
410       if (exe_ctx) {
411         Process *process = exe_ctx->GetProcessPtr();
412         if (process) {
413           Error error;
414           return exe_ctx->GetProcessPtr()->ReadMemory(addr, dst, byte_size,
415                                                       error) == byte_size;
416         }
417       }
418     }
419   }
420   return false;
421 }
422 
423 bool Type::WriteToMemory(ExecutionContext *exe_ctx, lldb::addr_t addr,
424                          AddressType address_type, DataExtractor &data) {
425   return false;
426 }
427 
428 TypeList *Type::GetTypeList() { return GetSymbolFile()->GetTypeList(); }
429 
430 const Declaration &Type::GetDeclaration() const { return m_decl; }
431 
432 bool Type::ResolveClangType(ResolveState compiler_type_resolve_state) {
433   // TODO: This needs to consider the correct type system to use.
434   Type *encoding_type = nullptr;
435   if (!m_compiler_type.IsValid()) {
436     encoding_type = GetEncodingType();
437     if (encoding_type) {
438       switch (m_encoding_uid_type) {
439       case eEncodingIsUID: {
440         CompilerType encoding_compiler_type =
441             encoding_type->GetForwardCompilerType();
442         if (encoding_compiler_type.IsValid()) {
443           m_compiler_type = encoding_compiler_type;
444           m_flags.compiler_type_resolve_state =
445               encoding_type->m_flags.compiler_type_resolve_state;
446         }
447       } break;
448 
449       case eEncodingIsConstUID:
450         m_compiler_type =
451             encoding_type->GetForwardCompilerType().AddConstModifier();
452         break;
453 
454       case eEncodingIsRestrictUID:
455         m_compiler_type =
456             encoding_type->GetForwardCompilerType().AddRestrictModifier();
457         break;
458 
459       case eEncodingIsVolatileUID:
460         m_compiler_type =
461             encoding_type->GetForwardCompilerType().AddVolatileModifier();
462         break;
463 
464       case eEncodingIsTypedefUID:
465         m_compiler_type = encoding_type->GetForwardCompilerType().CreateTypedef(
466             m_name.AsCString("__lldb_invalid_typedef_name"),
467             GetSymbolFile()->GetDeclContextContainingUID(GetID()));
468         m_name.Clear();
469         break;
470 
471       case eEncodingIsPointerUID:
472         m_compiler_type =
473             encoding_type->GetForwardCompilerType().GetPointerType();
474         break;
475 
476       case eEncodingIsLValueReferenceUID:
477         m_compiler_type =
478             encoding_type->GetForwardCompilerType().GetLValueReferenceType();
479         break;
480 
481       case eEncodingIsRValueReferenceUID:
482         m_compiler_type =
483             encoding_type->GetForwardCompilerType().GetRValueReferenceType();
484         break;
485 
486       default:
487         assert(!"Unhandled encoding_data_type.");
488         break;
489       }
490     } else {
491       // We have no encoding type, return void?
492       TypeSystem *type_system =
493           m_symbol_file->GetTypeSystemForLanguage(eLanguageTypeC);
494       CompilerType void_compiler_type =
495           type_system->GetBasicTypeFromAST(eBasicTypeVoid);
496       switch (m_encoding_uid_type) {
497       case eEncodingIsUID:
498         m_compiler_type = void_compiler_type;
499         break;
500 
501       case eEncodingIsConstUID:
502         m_compiler_type = void_compiler_type.AddConstModifier();
503         break;
504 
505       case eEncodingIsRestrictUID:
506         m_compiler_type = void_compiler_type.AddRestrictModifier();
507         break;
508 
509       case eEncodingIsVolatileUID:
510         m_compiler_type = void_compiler_type.AddVolatileModifier();
511         break;
512 
513       case eEncodingIsTypedefUID:
514         m_compiler_type = void_compiler_type.CreateTypedef(
515             m_name.AsCString("__lldb_invalid_typedef_name"),
516             GetSymbolFile()->GetDeclContextContainingUID(GetID()));
517         break;
518 
519       case eEncodingIsPointerUID:
520         m_compiler_type = void_compiler_type.GetPointerType();
521         break;
522 
523       case eEncodingIsLValueReferenceUID:
524         m_compiler_type = void_compiler_type.GetLValueReferenceType();
525         break;
526 
527       case eEncodingIsRValueReferenceUID:
528         m_compiler_type = void_compiler_type.GetRValueReferenceType();
529         break;
530 
531       default:
532         assert(!"Unhandled encoding_data_type.");
533         break;
534       }
535     }
536 
537     // When we have a EncodingUID, our "m_flags.compiler_type_resolve_state" is
538     // set to eResolveStateUnresolved
539     // so we need to update it to say that we now have a forward declaration
540     // since that is what we created
541     // above.
542     if (m_compiler_type.IsValid())
543       m_flags.compiler_type_resolve_state = eResolveStateForward;
544   }
545 
546   // Check if we have a forward reference to a class/struct/union/enum?
547   if (compiler_type_resolve_state == eResolveStateLayout ||
548       compiler_type_resolve_state == eResolveStateFull) {
549     // Check if we have a forward reference to a class/struct/union/enum?
550     if (m_compiler_type.IsValid() &&
551         m_flags.compiler_type_resolve_state < compiler_type_resolve_state) {
552       m_flags.compiler_type_resolve_state = eResolveStateFull;
553       if (!m_compiler_type.IsDefined()) {
554         // We have a forward declaration, we need to resolve it to a complete
555         // definition.
556         m_symbol_file->CompleteType(m_compiler_type);
557       }
558     }
559   }
560 
561   // If we have an encoding type, then we need to make sure it is
562   // resolved appropriately.
563   if (m_encoding_uid != LLDB_INVALID_UID) {
564     if (encoding_type == nullptr)
565       encoding_type = GetEncodingType();
566     if (encoding_type) {
567       ResolveState encoding_compiler_type_resolve_state =
568           compiler_type_resolve_state;
569 
570       if (compiler_type_resolve_state == eResolveStateLayout) {
571         switch (m_encoding_uid_type) {
572         case eEncodingIsPointerUID:
573         case eEncodingIsLValueReferenceUID:
574         case eEncodingIsRValueReferenceUID:
575           encoding_compiler_type_resolve_state = eResolveStateForward;
576           break;
577         default:
578           break;
579         }
580       }
581       encoding_type->ResolveClangType(encoding_compiler_type_resolve_state);
582     }
583   }
584   return m_compiler_type.IsValid();
585 }
586 uint32_t Type::GetEncodingMask() {
587   uint32_t encoding_mask = 1u << m_encoding_uid_type;
588   Type *encoding_type = GetEncodingType();
589   assert(encoding_type != this);
590   if (encoding_type)
591     encoding_mask |= encoding_type->GetEncodingMask();
592   return encoding_mask;
593 }
594 
595 CompilerType Type::GetFullCompilerType() {
596   ResolveClangType(eResolveStateFull);
597   return m_compiler_type;
598 }
599 
600 CompilerType Type::GetLayoutCompilerType() {
601   ResolveClangType(eResolveStateLayout);
602   return m_compiler_type;
603 }
604 
605 CompilerType Type::GetForwardCompilerType() {
606   ResolveClangType(eResolveStateForward);
607   return m_compiler_type;
608 }
609 
610 int Type::Compare(const Type &a, const Type &b) {
611   // Just compare the UID values for now...
612   lldb::user_id_t a_uid = a.GetID();
613   lldb::user_id_t b_uid = b.GetID();
614   if (a_uid < b_uid)
615     return -1;
616   if (a_uid > b_uid)
617     return 1;
618   return 0;
619 }
620 
621 ConstString Type::GetQualifiedName() {
622   return GetForwardCompilerType().GetConstTypeName();
623 }
624 
625 bool Type::GetTypeScopeAndBasename(const char *&name_cstr, std::string &scope,
626                                    std::string &basename,
627                                    TypeClass &type_class) {
628   // Protect against null c string.
629 
630   type_class = eTypeClassAny;
631 
632   if (name_cstr && name_cstr[0]) {
633     llvm::StringRef name_strref(name_cstr);
634     if (name_strref.startswith("struct ")) {
635       name_cstr += 7;
636       type_class = eTypeClassStruct;
637     } else if (name_strref.startswith("class ")) {
638       name_cstr += 6;
639       type_class = eTypeClassClass;
640     } else if (name_strref.startswith("union ")) {
641       name_cstr += 6;
642       type_class = eTypeClassUnion;
643     } else if (name_strref.startswith("enum ")) {
644       name_cstr += 5;
645       type_class = eTypeClassEnumeration;
646     } else if (name_strref.startswith("typedef ")) {
647       name_cstr += 8;
648       type_class = eTypeClassTypedef;
649     }
650     const char *basename_cstr = name_cstr;
651     const char *namespace_separator = ::strstr(basename_cstr, "::");
652     if (namespace_separator) {
653       const char *template_arg_char = ::strchr(basename_cstr, '<');
654       while (namespace_separator != nullptr) {
655         if (template_arg_char &&
656             namespace_separator > template_arg_char) // but namespace'd template
657                                                      // arguments are still good
658                                                      // to go
659           break;
660         basename_cstr = namespace_separator + 2;
661         namespace_separator = strstr(basename_cstr, "::");
662       }
663       if (basename_cstr > name_cstr) {
664         scope.assign(name_cstr, basename_cstr - name_cstr);
665         basename.assign(basename_cstr);
666         return true;
667       }
668     }
669   }
670   return false;
671 }
672 
673 ModuleSP Type::GetModule() {
674   if (m_symbol_file)
675     return m_symbol_file->GetObjectFile()->GetModule();
676   return ModuleSP();
677 }
678 
679 TypeAndOrName::TypeAndOrName() : m_type_pair(), m_type_name() {}
680 
681 TypeAndOrName::TypeAndOrName(TypeSP &in_type_sp) : m_type_pair(in_type_sp) {
682   if (in_type_sp)
683     m_type_name = in_type_sp->GetName();
684 }
685 
686 TypeAndOrName::TypeAndOrName(const char *in_type_str)
687     : m_type_name(in_type_str) {}
688 
689 TypeAndOrName::TypeAndOrName(const TypeAndOrName &rhs)
690     : m_type_pair(rhs.m_type_pair), m_type_name(rhs.m_type_name) {}
691 
692 TypeAndOrName::TypeAndOrName(ConstString &in_type_const_string)
693     : m_type_name(in_type_const_string) {}
694 
695 TypeAndOrName &TypeAndOrName::operator=(const TypeAndOrName &rhs) {
696   if (this != &rhs) {
697     m_type_name = rhs.m_type_name;
698     m_type_pair = rhs.m_type_pair;
699   }
700   return *this;
701 }
702 
703 bool TypeAndOrName::operator==(const TypeAndOrName &other) const {
704   if (m_type_pair != other.m_type_pair)
705     return false;
706   if (m_type_name != other.m_type_name)
707     return false;
708   return true;
709 }
710 
711 bool TypeAndOrName::operator!=(const TypeAndOrName &other) const {
712   if (m_type_pair != other.m_type_pair)
713     return true;
714   if (m_type_name != other.m_type_name)
715     return true;
716   return false;
717 }
718 
719 ConstString TypeAndOrName::GetName() const {
720   if (m_type_name)
721     return m_type_name;
722   if (m_type_pair)
723     return m_type_pair.GetName();
724   return ConstString("<invalid>");
725 }
726 
727 void TypeAndOrName::SetName(const ConstString &type_name) {
728   m_type_name = type_name;
729 }
730 
731 void TypeAndOrName::SetName(const char *type_name_cstr) {
732   m_type_name.SetCString(type_name_cstr);
733 }
734 
735 void TypeAndOrName::SetTypeSP(lldb::TypeSP type_sp) {
736   m_type_pair.SetType(type_sp);
737   if (m_type_pair)
738     m_type_name = m_type_pair.GetName();
739 }
740 
741 void TypeAndOrName::SetCompilerType(CompilerType compiler_type) {
742   m_type_pair.SetType(compiler_type);
743   if (m_type_pair)
744     m_type_name = m_type_pair.GetName();
745 }
746 
747 bool TypeAndOrName::IsEmpty() const {
748   if ((bool)m_type_name || (bool)m_type_pair)
749     return false;
750   else
751     return true;
752 }
753 
754 void TypeAndOrName::Clear() {
755   m_type_name.Clear();
756   m_type_pair.Clear();
757 }
758 
759 bool TypeAndOrName::HasName() const { return (bool)m_type_name; }
760 
761 bool TypeAndOrName::HasTypeSP() const {
762   return m_type_pair.GetTypeSP().get() != nullptr;
763 }
764 
765 bool TypeAndOrName::HasCompilerType() const {
766   return m_type_pair.GetCompilerType().IsValid();
767 }
768 
769 TypeImpl::TypeImpl() : m_module_wp(), m_static_type(), m_dynamic_type() {}
770 
771 TypeImpl::TypeImpl(const TypeImpl &rhs)
772     : m_module_wp(rhs.m_module_wp), m_static_type(rhs.m_static_type),
773       m_dynamic_type(rhs.m_dynamic_type) {}
774 
775 TypeImpl::TypeImpl(const lldb::TypeSP &type_sp)
776     : m_module_wp(), m_static_type(), m_dynamic_type() {
777   SetType(type_sp);
778 }
779 
780 TypeImpl::TypeImpl(const CompilerType &compiler_type)
781     : m_module_wp(), m_static_type(), m_dynamic_type() {
782   SetType(compiler_type);
783 }
784 
785 TypeImpl::TypeImpl(const lldb::TypeSP &type_sp, const CompilerType &dynamic)
786     : m_module_wp(), m_static_type(type_sp), m_dynamic_type(dynamic) {
787   SetType(type_sp, dynamic);
788 }
789 
790 TypeImpl::TypeImpl(const CompilerType &static_type,
791                    const CompilerType &dynamic_type)
792     : m_module_wp(), m_static_type(), m_dynamic_type() {
793   SetType(static_type, dynamic_type);
794 }
795 
796 TypeImpl::TypeImpl(const TypePair &pair, const CompilerType &dynamic)
797     : m_module_wp(), m_static_type(), m_dynamic_type() {
798   SetType(pair, dynamic);
799 }
800 
801 void TypeImpl::SetType(const lldb::TypeSP &type_sp) {
802   m_static_type.SetType(type_sp);
803   if (type_sp)
804     m_module_wp = type_sp->GetModule();
805   else
806     m_module_wp = lldb::ModuleWP();
807 }
808 
809 void TypeImpl::SetType(const CompilerType &compiler_type) {
810   m_module_wp = lldb::ModuleWP();
811   m_static_type.SetType(compiler_type);
812 }
813 
814 void TypeImpl::SetType(const lldb::TypeSP &type_sp,
815                        const CompilerType &dynamic) {
816   SetType(type_sp);
817   m_dynamic_type = dynamic;
818 }
819 
820 void TypeImpl::SetType(const CompilerType &compiler_type,
821                        const CompilerType &dynamic) {
822   m_module_wp = lldb::ModuleWP();
823   m_static_type.SetType(compiler_type);
824   m_dynamic_type = dynamic;
825 }
826 
827 void TypeImpl::SetType(const TypePair &pair, const CompilerType &dynamic) {
828   m_module_wp = pair.GetModule();
829   m_static_type = pair;
830   m_dynamic_type = dynamic;
831 }
832 
833 TypeImpl &TypeImpl::operator=(const TypeImpl &rhs) {
834   if (rhs != *this) {
835     m_module_wp = rhs.m_module_wp;
836     m_static_type = rhs.m_static_type;
837     m_dynamic_type = rhs.m_dynamic_type;
838   }
839   return *this;
840 }
841 
842 bool TypeImpl::CheckModule(lldb::ModuleSP &module_sp) const {
843   // Check if we have a module for this type. If we do and the shared pointer is
844   // can be successfully initialized with m_module_wp, return true. Else return
845   // false
846   // if we didn't have a module, or if we had a module and it has been deleted.
847   // Any
848   // functions doing anything with a TypeSP in this TypeImpl class should call
849   // this
850   // function and only do anything with the ivars if this function returns true.
851   // If
852   // we have a module, the "module_sp" will be filled in with a strong reference
853   // to the
854   // module so that the module will at least stay around long enough for the
855   // type
856   // query to succeed.
857   module_sp = m_module_wp.lock();
858   if (!module_sp) {
859     lldb::ModuleWP empty_module_wp;
860     // If either call to "std::weak_ptr::owner_before(...) value returns true,
861     // this
862     // indicates that m_module_wp once contained (possibly still does) a
863     // reference
864     // to a valid shared pointer. This helps us know if we had a valid reference
865     // to
866     // a section which is now invalid because the module it was in was deleted
867     if (empty_module_wp.owner_before(m_module_wp) ||
868         m_module_wp.owner_before(empty_module_wp)) {
869       // m_module_wp had a valid reference to a module, but all strong
870       // references
871       // have been released and the module has been deleted
872       return false;
873     }
874   }
875   // We either successfully locked the module, or didn't have one to begin with
876   return true;
877 }
878 
879 bool TypeImpl::operator==(const TypeImpl &rhs) const {
880   return m_static_type == rhs.m_static_type &&
881          m_dynamic_type == rhs.m_dynamic_type;
882 }
883 
884 bool TypeImpl::operator!=(const TypeImpl &rhs) const {
885   return m_static_type != rhs.m_static_type ||
886          m_dynamic_type != rhs.m_dynamic_type;
887 }
888 
889 bool TypeImpl::IsValid() const {
890   // just a name is not valid
891   ModuleSP module_sp;
892   if (CheckModule(module_sp))
893     return m_static_type.IsValid() || m_dynamic_type.IsValid();
894   return false;
895 }
896 
897 TypeImpl::operator bool() const { return IsValid(); }
898 
899 void TypeImpl::Clear() {
900   m_module_wp = lldb::ModuleWP();
901   m_static_type.Clear();
902   m_dynamic_type.Clear();
903 }
904 
905 ConstString TypeImpl::GetName() const {
906   ModuleSP module_sp;
907   if (CheckModule(module_sp)) {
908     if (m_dynamic_type)
909       return m_dynamic_type.GetTypeName();
910     return m_static_type.GetName();
911   }
912   return ConstString();
913 }
914 
915 ConstString TypeImpl::GetDisplayTypeName() const {
916   ModuleSP module_sp;
917   if (CheckModule(module_sp)) {
918     if (m_dynamic_type)
919       return m_dynamic_type.GetDisplayTypeName();
920     return m_static_type.GetDisplayTypeName();
921   }
922   return ConstString();
923 }
924 
925 TypeImpl TypeImpl::GetPointerType() const {
926   ModuleSP module_sp;
927   if (CheckModule(module_sp)) {
928     if (m_dynamic_type.IsValid()) {
929       return TypeImpl(m_static_type.GetPointerType(),
930                       m_dynamic_type.GetPointerType());
931     }
932     return TypeImpl(m_static_type.GetPointerType());
933   }
934   return TypeImpl();
935 }
936 
937 TypeImpl TypeImpl::GetPointeeType() const {
938   ModuleSP module_sp;
939   if (CheckModule(module_sp)) {
940     if (m_dynamic_type.IsValid()) {
941       return TypeImpl(m_static_type.GetPointeeType(),
942                       m_dynamic_type.GetPointeeType());
943     }
944     return TypeImpl(m_static_type.GetPointeeType());
945   }
946   return TypeImpl();
947 }
948 
949 TypeImpl TypeImpl::GetReferenceType() const {
950   ModuleSP module_sp;
951   if (CheckModule(module_sp)) {
952     if (m_dynamic_type.IsValid()) {
953       return TypeImpl(m_static_type.GetReferenceType(),
954                       m_dynamic_type.GetLValueReferenceType());
955     }
956     return TypeImpl(m_static_type.GetReferenceType());
957   }
958   return TypeImpl();
959 }
960 
961 TypeImpl TypeImpl::GetTypedefedType() const {
962   ModuleSP module_sp;
963   if (CheckModule(module_sp)) {
964     if (m_dynamic_type.IsValid()) {
965       return TypeImpl(m_static_type.GetTypedefedType(),
966                       m_dynamic_type.GetTypedefedType());
967     }
968     return TypeImpl(m_static_type.GetTypedefedType());
969   }
970   return TypeImpl();
971 }
972 
973 TypeImpl TypeImpl::GetDereferencedType() const {
974   ModuleSP module_sp;
975   if (CheckModule(module_sp)) {
976     if (m_dynamic_type.IsValid()) {
977       return TypeImpl(m_static_type.GetDereferencedType(),
978                       m_dynamic_type.GetNonReferenceType());
979     }
980     return TypeImpl(m_static_type.GetDereferencedType());
981   }
982   return TypeImpl();
983 }
984 
985 TypeImpl TypeImpl::GetUnqualifiedType() const {
986   ModuleSP module_sp;
987   if (CheckModule(module_sp)) {
988     if (m_dynamic_type.IsValid()) {
989       return TypeImpl(m_static_type.GetUnqualifiedType(),
990                       m_dynamic_type.GetFullyUnqualifiedType());
991     }
992     return TypeImpl(m_static_type.GetUnqualifiedType());
993   }
994   return TypeImpl();
995 }
996 
997 TypeImpl TypeImpl::GetCanonicalType() const {
998   ModuleSP module_sp;
999   if (CheckModule(module_sp)) {
1000     if (m_dynamic_type.IsValid()) {
1001       return TypeImpl(m_static_type.GetCanonicalType(),
1002                       m_dynamic_type.GetCanonicalType());
1003     }
1004     return TypeImpl(m_static_type.GetCanonicalType());
1005   }
1006   return TypeImpl();
1007 }
1008 
1009 CompilerType TypeImpl::GetCompilerType(bool prefer_dynamic) {
1010   ModuleSP module_sp;
1011   if (CheckModule(module_sp)) {
1012     if (prefer_dynamic) {
1013       if (m_dynamic_type.IsValid())
1014         return m_dynamic_type;
1015     }
1016     return m_static_type.GetCompilerType();
1017   }
1018   return CompilerType();
1019 }
1020 
1021 TypeSystem *TypeImpl::GetTypeSystem(bool prefer_dynamic) {
1022   ModuleSP module_sp;
1023   if (CheckModule(module_sp)) {
1024     if (prefer_dynamic) {
1025       if (m_dynamic_type.IsValid())
1026         return m_dynamic_type.GetTypeSystem();
1027     }
1028     return m_static_type.GetCompilerType().GetTypeSystem();
1029   }
1030   return NULL;
1031 }
1032 
1033 bool TypeImpl::GetDescription(lldb_private::Stream &strm,
1034                               lldb::DescriptionLevel description_level) {
1035   ModuleSP module_sp;
1036   if (CheckModule(module_sp)) {
1037     if (m_dynamic_type.IsValid()) {
1038       strm.Printf("Dynamic:\n");
1039       m_dynamic_type.DumpTypeDescription(&strm);
1040       strm.Printf("\nStatic:\n");
1041     }
1042     m_static_type.GetCompilerType().DumpTypeDescription(&strm);
1043   } else {
1044     strm.PutCString("Invalid TypeImpl module for type has been deleted\n");
1045   }
1046   return true;
1047 }
1048 
1049 bool TypeMemberFunctionImpl::IsValid() {
1050   return m_type.IsValid() && m_kind != lldb::eMemberFunctionKindUnknown;
1051 }
1052 
1053 ConstString TypeMemberFunctionImpl::GetName() const { return m_name; }
1054 
1055 ConstString TypeMemberFunctionImpl::GetMangledName() const {
1056   return m_decl.GetMangledName();
1057 }
1058 
1059 CompilerType TypeMemberFunctionImpl::GetType() const { return m_type; }
1060 
1061 lldb::MemberFunctionKind TypeMemberFunctionImpl::GetKind() const {
1062   return m_kind;
1063 }
1064 
1065 bool TypeMemberFunctionImpl::GetDescription(Stream &stream) {
1066   switch (m_kind) {
1067   case lldb::eMemberFunctionKindUnknown:
1068     return false;
1069   case lldb::eMemberFunctionKindConstructor:
1070     stream.Printf("constructor for %s",
1071                   m_type.GetTypeName().AsCString("<unknown>"));
1072     break;
1073   case lldb::eMemberFunctionKindDestructor:
1074     stream.Printf("destructor for %s",
1075                   m_type.GetTypeName().AsCString("<unknown>"));
1076     break;
1077   case lldb::eMemberFunctionKindInstanceMethod:
1078     stream.Printf("instance method %s of type %s", m_name.AsCString(),
1079                   m_decl.GetDeclContext().GetName().AsCString());
1080     break;
1081   case lldb::eMemberFunctionKindStaticMethod:
1082     stream.Printf("static method %s of type %s", m_name.AsCString(),
1083                   m_decl.GetDeclContext().GetName().AsCString());
1084     break;
1085   }
1086   return true;
1087 }
1088 
1089 CompilerType TypeMemberFunctionImpl::GetReturnType() const {
1090   if (m_type)
1091     return m_type.GetFunctionReturnType();
1092   return m_decl.GetFunctionReturnType();
1093 }
1094 
1095 size_t TypeMemberFunctionImpl::GetNumArguments() const {
1096   if (m_type)
1097     return m_type.GetNumberOfFunctionArguments();
1098   else
1099     return m_decl.GetNumFunctionArguments();
1100 }
1101 
1102 CompilerType TypeMemberFunctionImpl::GetArgumentAtIndex(size_t idx) const {
1103   if (m_type)
1104     return m_type.GetFunctionArgumentAtIndex(idx);
1105   else
1106     return m_decl.GetFunctionArgumentType(idx);
1107 }
1108 
1109 TypeEnumMemberImpl::TypeEnumMemberImpl(const lldb::TypeImplSP &integer_type_sp,
1110                                        const ConstString &name,
1111                                        const llvm::APSInt &value)
1112     : m_integer_type_sp(integer_type_sp), m_name(name), m_value(value),
1113       m_valid((bool)name && (bool)integer_type_sp)
1114 
1115 {}
1116