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