1 //===-- CompilerType.cpp ----------------------------------------*- C++ -*-===//
2 //
3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4 // See https://llvm.org/LICENSE.txt for license information.
5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6 //
7 //===----------------------------------------------------------------------===//
8 
9 #include "lldb/Symbol/CompilerType.h"
10 
11 #include "lldb/Core/Debugger.h"
12 #include "lldb/Core/StreamFile.h"
13 #include "lldb/Symbol/Type.h"
14 #include "lldb/Target/ExecutionContext.h"
15 #include "lldb/Target/Process.h"
16 #include "lldb/Utility/ConstString.h"
17 #include "lldb/Utility/DataBufferHeap.h"
18 #include "lldb/Utility/DataExtractor.h"
19 #include "lldb/Utility/Scalar.h"
20 #include "lldb/Utility/Stream.h"
21 #include "lldb/Utility/StreamString.h"
22 
23 #include <iterator>
24 #include <mutex>
25 
26 using namespace lldb;
27 using namespace lldb_private;
28 
29 // Tests
30 
31 bool CompilerType::IsAggregateType() const {
32   if (IsValid())
33     return m_type_system->IsAggregateType(m_type);
34   return false;
35 }
36 
37 bool CompilerType::IsAnonymousType() const {
38   if (IsValid())
39     return m_type_system->IsAnonymousType(m_type);
40   return false;
41 }
42 
43 bool CompilerType::IsArrayType(CompilerType *element_type_ptr, uint64_t *size,
44                                bool *is_incomplete) const {
45   if (IsValid())
46     return m_type_system->IsArrayType(m_type, element_type_ptr, size,
47                                       is_incomplete);
48 
49   if (element_type_ptr)
50     element_type_ptr->Clear();
51   if (size)
52     *size = 0;
53   if (is_incomplete)
54     *is_incomplete = false;
55   return false;
56 }
57 
58 bool CompilerType::IsVectorType(CompilerType *element_type,
59                                 uint64_t *size) const {
60   if (IsValid())
61     return m_type_system->IsVectorType(m_type, element_type, size);
62   return false;
63 }
64 
65 bool CompilerType::IsRuntimeGeneratedType() const {
66   if (IsValid())
67     return m_type_system->IsRuntimeGeneratedType(m_type);
68   return false;
69 }
70 
71 bool CompilerType::IsCharType() const {
72   if (IsValid())
73     return m_type_system->IsCharType(m_type);
74   return false;
75 }
76 
77 bool CompilerType::IsCompleteType() const {
78   if (IsValid())
79     return m_type_system->IsCompleteType(m_type);
80   return false;
81 }
82 
83 bool CompilerType::IsConst() const {
84   if (IsValid())
85     return m_type_system->IsConst(m_type);
86   return false;
87 }
88 
89 bool CompilerType::IsCStringType(uint32_t &length) const {
90   if (IsValid())
91     return m_type_system->IsCStringType(m_type, length);
92   return false;
93 }
94 
95 bool CompilerType::IsFunctionType(bool *is_variadic_ptr) const {
96   if (IsValid())
97     return m_type_system->IsFunctionType(m_type, is_variadic_ptr);
98   return false;
99 }
100 
101 // Used to detect "Homogeneous Floating-point Aggregates"
102 uint32_t
103 CompilerType::IsHomogeneousAggregate(CompilerType *base_type_ptr) const {
104   if (IsValid())
105     return m_type_system->IsHomogeneousAggregate(m_type, base_type_ptr);
106   return 0;
107 }
108 
109 size_t CompilerType::GetNumberOfFunctionArguments() const {
110   if (IsValid())
111     return m_type_system->GetNumberOfFunctionArguments(m_type);
112   return 0;
113 }
114 
115 CompilerType
116 CompilerType::GetFunctionArgumentAtIndex(const size_t index) const {
117   if (IsValid())
118     return m_type_system->GetFunctionArgumentAtIndex(m_type, index);
119   return CompilerType();
120 }
121 
122 bool CompilerType::IsFunctionPointerType() const {
123   if (IsValid())
124     return m_type_system->IsFunctionPointerType(m_type);
125   return false;
126 }
127 
128 bool CompilerType::IsBlockPointerType(
129     CompilerType *function_pointer_type_ptr) const {
130   if (IsValid())
131     return m_type_system->IsBlockPointerType(m_type, function_pointer_type_ptr);
132   return false;
133 }
134 
135 bool CompilerType::IsIntegerType(bool &is_signed) const {
136   if (IsValid())
137     return m_type_system->IsIntegerType(m_type, is_signed);
138   return false;
139 }
140 
141 bool CompilerType::IsEnumerationType(bool &is_signed) const {
142   if (IsValid())
143     return m_type_system->IsEnumerationType(m_type, is_signed);
144   return false;
145 }
146 
147 bool CompilerType::IsIntegerOrEnumerationType(bool &is_signed) const {
148   return IsIntegerType(is_signed) || IsEnumerationType(is_signed);
149 }
150 
151 bool CompilerType::IsPointerType(CompilerType *pointee_type) const {
152   if (IsValid()) {
153     return m_type_system->IsPointerType(m_type, pointee_type);
154   }
155   if (pointee_type)
156     pointee_type->Clear();
157   return false;
158 }
159 
160 bool CompilerType::IsPointerOrReferenceType(CompilerType *pointee_type) const {
161   if (IsValid()) {
162     return m_type_system->IsPointerOrReferenceType(m_type, pointee_type);
163   }
164   if (pointee_type)
165     pointee_type->Clear();
166   return false;
167 }
168 
169 bool CompilerType::IsReferenceType(CompilerType *pointee_type,
170                                    bool *is_rvalue) const {
171   if (IsValid()) {
172     return m_type_system->IsReferenceType(m_type, pointee_type, is_rvalue);
173   }
174   if (pointee_type)
175     pointee_type->Clear();
176   return false;
177 }
178 
179 bool CompilerType::ShouldTreatScalarValueAsAddress() const {
180   if (IsValid())
181     return m_type_system->ShouldTreatScalarValueAsAddress(m_type);
182   return false;
183 }
184 
185 bool CompilerType::IsFloatingPointType(uint32_t &count,
186                                        bool &is_complex) const {
187   if (IsValid()) {
188     return m_type_system->IsFloatingPointType(m_type, count, is_complex);
189   }
190   count = 0;
191   is_complex = false;
192   return false;
193 }
194 
195 bool CompilerType::IsDefined() const {
196   if (IsValid())
197     return m_type_system->IsDefined(m_type);
198   return true;
199 }
200 
201 bool CompilerType::IsPolymorphicClass() const {
202   if (IsValid()) {
203     return m_type_system->IsPolymorphicClass(m_type);
204   }
205   return false;
206 }
207 
208 bool CompilerType::IsPossibleDynamicType(CompilerType *dynamic_pointee_type,
209                                          bool check_cplusplus,
210                                          bool check_objc) const {
211   if (IsValid())
212     return m_type_system->IsPossibleDynamicType(m_type, dynamic_pointee_type,
213                                                 check_cplusplus, check_objc);
214   return false;
215 }
216 
217 bool CompilerType::IsScalarType() const {
218   if (!IsValid())
219     return false;
220 
221   return m_type_system->IsScalarType(m_type);
222 }
223 
224 bool CompilerType::IsTypedefType() const {
225   if (!IsValid())
226     return false;
227   return m_type_system->IsTypedefType(m_type);
228 }
229 
230 bool CompilerType::IsVoidType() const {
231   if (!IsValid())
232     return false;
233   return m_type_system->IsVoidType(m_type);
234 }
235 
236 bool CompilerType::IsPointerToScalarType() const {
237   if (!IsValid())
238     return false;
239 
240   return IsPointerType() && GetPointeeType().IsScalarType();
241 }
242 
243 bool CompilerType::IsArrayOfScalarType() const {
244   CompilerType element_type;
245   if (IsArrayType(&element_type, nullptr, nullptr))
246     return element_type.IsScalarType();
247   return false;
248 }
249 
250 bool CompilerType::IsBeingDefined() const {
251   if (!IsValid())
252     return false;
253   return m_type_system->IsBeingDefined(m_type);
254 }
255 
256 // Type Completion
257 
258 bool CompilerType::GetCompleteType() const {
259   if (!IsValid())
260     return false;
261   return m_type_system->GetCompleteType(m_type);
262 }
263 
264 // AST related queries
265 size_t CompilerType::GetPointerByteSize() const {
266   if (m_type_system)
267     return m_type_system->GetPointerByteSize();
268   return 0;
269 }
270 
271 ConstString CompilerType::GetConstQualifiedTypeName() const {
272   return GetConstTypeName();
273 }
274 
275 ConstString CompilerType::GetConstTypeName() const {
276   if (IsValid()) {
277     ConstString type_name(GetTypeName());
278     if (type_name)
279       return type_name;
280   }
281   return ConstString("<invalid>");
282 }
283 
284 ConstString CompilerType::GetTypeName() const {
285   if (IsValid()) {
286     return m_type_system->GetTypeName(m_type);
287   }
288   return ConstString("<invalid>");
289 }
290 
291 ConstString CompilerType::GetDisplayTypeName() const { return GetTypeName(); }
292 
293 uint32_t CompilerType::GetTypeInfo(
294     CompilerType *pointee_or_element_compiler_type) const {
295   if (!IsValid())
296     return 0;
297 
298   return m_type_system->GetTypeInfo(m_type, pointee_or_element_compiler_type);
299 }
300 
301 lldb::LanguageType CompilerType::GetMinimumLanguage() {
302   if (!IsValid())
303     return lldb::eLanguageTypeC;
304 
305   return m_type_system->GetMinimumLanguage(m_type);
306 }
307 
308 lldb::TypeClass CompilerType::GetTypeClass() const {
309   if (!IsValid())
310     return lldb::eTypeClassInvalid;
311 
312   return m_type_system->GetTypeClass(m_type);
313 }
314 
315 void CompilerType::SetCompilerType(TypeSystem *type_system,
316                                    lldb::opaque_compiler_type_t type) {
317   m_type_system = type_system;
318   m_type = type;
319 }
320 
321 unsigned CompilerType::GetTypeQualifiers() const {
322   if (IsValid())
323     return m_type_system->GetTypeQualifiers(m_type);
324   return 0;
325 }
326 
327 // Creating related types
328 
329 CompilerType CompilerType::GetArrayElementType(uint64_t *stride) const {
330   if (IsValid()) {
331     return m_type_system->GetArrayElementType(m_type, stride);
332   }
333   return CompilerType();
334 }
335 
336 CompilerType CompilerType::GetArrayType(uint64_t size) const {
337   if (IsValid()) {
338     return m_type_system->GetArrayType(m_type, size);
339   }
340   return CompilerType();
341 }
342 
343 CompilerType CompilerType::GetCanonicalType() const {
344   if (IsValid())
345     return m_type_system->GetCanonicalType(m_type);
346   return CompilerType();
347 }
348 
349 CompilerType CompilerType::GetFullyUnqualifiedType() const {
350   if (IsValid())
351     return m_type_system->GetFullyUnqualifiedType(m_type);
352   return CompilerType();
353 }
354 
355 int CompilerType::GetFunctionArgumentCount() const {
356   if (IsValid()) {
357     return m_type_system->GetFunctionArgumentCount(m_type);
358   }
359   return -1;
360 }
361 
362 CompilerType CompilerType::GetFunctionArgumentTypeAtIndex(size_t idx) const {
363   if (IsValid()) {
364     return m_type_system->GetFunctionArgumentTypeAtIndex(m_type, idx);
365   }
366   return CompilerType();
367 }
368 
369 CompilerType CompilerType::GetFunctionReturnType() const {
370   if (IsValid()) {
371     return m_type_system->GetFunctionReturnType(m_type);
372   }
373   return CompilerType();
374 }
375 
376 size_t CompilerType::GetNumMemberFunctions() const {
377   if (IsValid()) {
378     return m_type_system->GetNumMemberFunctions(m_type);
379   }
380   return 0;
381 }
382 
383 TypeMemberFunctionImpl CompilerType::GetMemberFunctionAtIndex(size_t idx) {
384   if (IsValid()) {
385     return m_type_system->GetMemberFunctionAtIndex(m_type, idx);
386   }
387   return TypeMemberFunctionImpl();
388 }
389 
390 CompilerType CompilerType::GetNonReferenceType() const {
391   if (IsValid())
392     return m_type_system->GetNonReferenceType(m_type);
393   return CompilerType();
394 }
395 
396 CompilerType CompilerType::GetPointeeType() const {
397   if (IsValid()) {
398     return m_type_system->GetPointeeType(m_type);
399   }
400   return CompilerType();
401 }
402 
403 CompilerType CompilerType::GetPointerType() const {
404   if (IsValid()) {
405     return m_type_system->GetPointerType(m_type);
406   }
407   return CompilerType();
408 }
409 
410 CompilerType CompilerType::GetLValueReferenceType() const {
411   if (IsValid())
412     return m_type_system->GetLValueReferenceType(m_type);
413   else
414     return CompilerType();
415 }
416 
417 CompilerType CompilerType::GetRValueReferenceType() const {
418   if (IsValid())
419     return m_type_system->GetRValueReferenceType(m_type);
420   else
421     return CompilerType();
422 }
423 
424 CompilerType CompilerType::GetAtomicType() const {
425   if (IsValid())
426     return m_type_system->GetAtomicType(m_type);
427   return CompilerType();
428 }
429 
430 CompilerType CompilerType::AddConstModifier() const {
431   if (IsValid())
432     return m_type_system->AddConstModifier(m_type);
433   else
434     return CompilerType();
435 }
436 
437 CompilerType CompilerType::AddVolatileModifier() const {
438   if (IsValid())
439     return m_type_system->AddVolatileModifier(m_type);
440   else
441     return CompilerType();
442 }
443 
444 CompilerType CompilerType::AddRestrictModifier() const {
445   if (IsValid())
446     return m_type_system->AddRestrictModifier(m_type);
447   else
448     return CompilerType();
449 }
450 
451 CompilerType
452 CompilerType::CreateTypedef(const char *name,
453                             const CompilerDeclContext &decl_ctx) const {
454   if (IsValid())
455     return m_type_system->CreateTypedef(m_type, name, decl_ctx);
456   else
457     return CompilerType();
458 }
459 
460 CompilerType CompilerType::GetTypedefedType() const {
461   if (IsValid())
462     return m_type_system->GetTypedefedType(m_type);
463   else
464     return CompilerType();
465 }
466 
467 // Create related types using the current type's AST
468 
469 CompilerType
470 CompilerType::GetBasicTypeFromAST(lldb::BasicType basic_type) const {
471   if (IsValid())
472     return m_type_system->GetBasicTypeFromAST(basic_type);
473   return CompilerType();
474 }
475 // Exploring the type
476 
477 llvm::Optional<uint64_t>
478 CompilerType::GetBitSize(ExecutionContextScope *exe_scope) const {
479   if (IsValid())
480     return m_type_system->GetBitSize(m_type, exe_scope);
481   return {};
482 }
483 
484 llvm::Optional<uint64_t>
485 CompilerType::GetByteSize(ExecutionContextScope *exe_scope) const {
486   if (llvm::Optional<uint64_t> bit_size = GetBitSize(exe_scope))
487     return (*bit_size + 7) / 8;
488   return {};
489 }
490 
491 llvm::Optional<size_t> CompilerType::GetTypeBitAlign(ExecutionContextScope *exe_scope) const {
492   if (IsValid())
493     return m_type_system->GetTypeBitAlign(m_type, exe_scope);
494   return {};
495 }
496 
497 lldb::Encoding CompilerType::GetEncoding(uint64_t &count) const {
498   if (!IsValid())
499     return lldb::eEncodingInvalid;
500 
501   return m_type_system->GetEncoding(m_type, count);
502 }
503 
504 lldb::Format CompilerType::GetFormat() const {
505   if (!IsValid())
506     return lldb::eFormatDefault;
507 
508   return m_type_system->GetFormat(m_type);
509 }
510 
511 uint32_t CompilerType::GetNumChildren(bool omit_empty_base_classes,
512                                       const ExecutionContext *exe_ctx) const {
513   if (!IsValid())
514     return 0;
515   return m_type_system->GetNumChildren(m_type, omit_empty_base_classes,
516                                        exe_ctx);
517 }
518 
519 lldb::BasicType CompilerType::GetBasicTypeEnumeration() const {
520   if (IsValid())
521     return m_type_system->GetBasicTypeEnumeration(m_type);
522   return eBasicTypeInvalid;
523 }
524 
525 void CompilerType::ForEachEnumerator(
526     std::function<bool(const CompilerType &integer_type,
527                        ConstString name,
528                        const llvm::APSInt &value)> const &callback) const {
529   if (IsValid())
530     return m_type_system->ForEachEnumerator(m_type, callback);
531 }
532 
533 uint32_t CompilerType::GetNumFields() const {
534   if (!IsValid())
535     return 0;
536   return m_type_system->GetNumFields(m_type);
537 }
538 
539 CompilerType CompilerType::GetFieldAtIndex(size_t idx, std::string &name,
540                                            uint64_t *bit_offset_ptr,
541                                            uint32_t *bitfield_bit_size_ptr,
542                                            bool *is_bitfield_ptr) const {
543   if (!IsValid())
544     return CompilerType();
545   return m_type_system->GetFieldAtIndex(m_type, idx, name, bit_offset_ptr,
546                                         bitfield_bit_size_ptr, is_bitfield_ptr);
547 }
548 
549 uint32_t CompilerType::GetNumDirectBaseClasses() const {
550   if (IsValid())
551     return m_type_system->GetNumDirectBaseClasses(m_type);
552   return 0;
553 }
554 
555 uint32_t CompilerType::GetNumVirtualBaseClasses() const {
556   if (IsValid())
557     return m_type_system->GetNumVirtualBaseClasses(m_type);
558   return 0;
559 }
560 
561 CompilerType
562 CompilerType::GetDirectBaseClassAtIndex(size_t idx,
563                                         uint32_t *bit_offset_ptr) const {
564   if (IsValid())
565     return m_type_system->GetDirectBaseClassAtIndex(m_type, idx,
566                                                     bit_offset_ptr);
567   return CompilerType();
568 }
569 
570 CompilerType
571 CompilerType::GetVirtualBaseClassAtIndex(size_t idx,
572                                          uint32_t *bit_offset_ptr) const {
573   if (IsValid())
574     return m_type_system->GetVirtualBaseClassAtIndex(m_type, idx,
575                                                      bit_offset_ptr);
576   return CompilerType();
577 }
578 
579 uint32_t CompilerType::GetIndexOfFieldWithName(
580     const char *name, CompilerType *field_compiler_type_ptr,
581     uint64_t *bit_offset_ptr, uint32_t *bitfield_bit_size_ptr,
582     bool *is_bitfield_ptr) const {
583   unsigned count = GetNumFields();
584   std::string field_name;
585   for (unsigned index = 0; index < count; index++) {
586     CompilerType field_compiler_type(
587         GetFieldAtIndex(index, field_name, bit_offset_ptr,
588                         bitfield_bit_size_ptr, is_bitfield_ptr));
589     if (strcmp(field_name.c_str(), name) == 0) {
590       if (field_compiler_type_ptr)
591         *field_compiler_type_ptr = field_compiler_type;
592       return index;
593     }
594   }
595   return UINT32_MAX;
596 }
597 
598 CompilerType CompilerType::GetChildCompilerTypeAtIndex(
599     ExecutionContext *exe_ctx, size_t idx, bool transparent_pointers,
600     bool omit_empty_base_classes, bool ignore_array_bounds,
601     std::string &child_name, uint32_t &child_byte_size,
602     int32_t &child_byte_offset, uint32_t &child_bitfield_bit_size,
603     uint32_t &child_bitfield_bit_offset, bool &child_is_base_class,
604     bool &child_is_deref_of_parent, ValueObject *valobj,
605     uint64_t &language_flags) const {
606   if (!IsValid())
607     return CompilerType();
608   return m_type_system->GetChildCompilerTypeAtIndex(
609       m_type, exe_ctx, idx, transparent_pointers, omit_empty_base_classes,
610       ignore_array_bounds, child_name, child_byte_size, child_byte_offset,
611       child_bitfield_bit_size, child_bitfield_bit_offset, child_is_base_class,
612       child_is_deref_of_parent, valobj, language_flags);
613 }
614 
615 // Look for a child member (doesn't include base classes, but it does include
616 // their members) in the type hierarchy. Returns an index path into
617 // "clang_type" on how to reach the appropriate member.
618 //
619 //    class A
620 //    {
621 //    public:
622 //        int m_a;
623 //        int m_b;
624 //    };
625 //
626 //    class B
627 //    {
628 //    };
629 //
630 //    class C :
631 //        public B,
632 //        public A
633 //    {
634 //    };
635 //
636 // If we have a clang type that describes "class C", and we wanted to looked
637 // "m_b" in it:
638 //
639 // With omit_empty_base_classes == false we would get an integer array back
640 // with: { 1,  1 } The first index 1 is the child index for "class A" within
641 // class C The second index 1 is the child index for "m_b" within class A
642 //
643 // With omit_empty_base_classes == true we would get an integer array back
644 // with: { 0,  1 } The first index 0 is the child index for "class A" within
645 // class C (since class B doesn't have any members it doesn't count) The second
646 // index 1 is the child index for "m_b" within class A
647 
648 size_t CompilerType::GetIndexOfChildMemberWithName(
649     const char *name, bool omit_empty_base_classes,
650     std::vector<uint32_t> &child_indexes) const {
651   if (IsValid() && name && name[0]) {
652     return m_type_system->GetIndexOfChildMemberWithName(
653         m_type, name, omit_empty_base_classes, child_indexes);
654   }
655   return 0;
656 }
657 
658 size_t CompilerType::GetNumTemplateArguments() const {
659   if (IsValid()) {
660     return m_type_system->GetNumTemplateArguments(m_type);
661   }
662   return 0;
663 }
664 
665 TemplateArgumentKind CompilerType::GetTemplateArgumentKind(size_t idx) const {
666   if (IsValid())
667     return m_type_system->GetTemplateArgumentKind(m_type, idx);
668   return eTemplateArgumentKindNull;
669 }
670 
671 CompilerType CompilerType::GetTypeTemplateArgument(size_t idx) const {
672   if (IsValid()) {
673     return m_type_system->GetTypeTemplateArgument(m_type, idx);
674   }
675   return CompilerType();
676 }
677 
678 llvm::Optional<CompilerType::IntegralTemplateArgument>
679 CompilerType::GetIntegralTemplateArgument(size_t idx) const {
680   if (IsValid())
681     return m_type_system->GetIntegralTemplateArgument(m_type, idx);
682   return llvm::None;
683 }
684 
685 CompilerType CompilerType::GetTypeForFormatters() const {
686   if (IsValid())
687     return m_type_system->GetTypeForFormatters(m_type);
688   return CompilerType();
689 }
690 
691 LazyBool CompilerType::ShouldPrintAsOneLiner(ValueObject *valobj) const {
692   if (IsValid())
693     return m_type_system->ShouldPrintAsOneLiner(m_type, valobj);
694   return eLazyBoolCalculate;
695 }
696 
697 bool CompilerType::IsMeaninglessWithoutDynamicResolution() const {
698   if (IsValid())
699     return m_type_system->IsMeaninglessWithoutDynamicResolution(m_type);
700   return false;
701 }
702 
703 // Get the index of the child of "clang_type" whose name matches. This function
704 // doesn't descend into the children, but only looks one level deep and name
705 // matches can include base class names.
706 
707 uint32_t
708 CompilerType::GetIndexOfChildWithName(const char *name,
709                                       bool omit_empty_base_classes) const {
710   if (IsValid() && name && name[0]) {
711     return m_type_system->GetIndexOfChildWithName(m_type, name,
712                                                   omit_empty_base_classes);
713   }
714   return UINT32_MAX;
715 }
716 
717 // Dumping types
718 #define DEPTH_INCREMENT 2
719 
720 void CompilerType::DumpValue(ExecutionContext *exe_ctx, Stream *s,
721                              lldb::Format format, const DataExtractor &data,
722                              lldb::offset_t data_byte_offset,
723                              size_t data_byte_size, uint32_t bitfield_bit_size,
724                              uint32_t bitfield_bit_offset, bool show_types,
725                              bool show_summary, bool verbose, uint32_t depth) {
726   if (!IsValid())
727     return;
728   m_type_system->DumpValue(m_type, exe_ctx, s, format, data, data_byte_offset,
729                            data_byte_size, bitfield_bit_size,
730                            bitfield_bit_offset, show_types, show_summary,
731                            verbose, depth);
732 }
733 
734 bool CompilerType::DumpTypeValue(Stream *s, lldb::Format format,
735                                  const DataExtractor &data,
736                                  lldb::offset_t byte_offset, size_t byte_size,
737                                  uint32_t bitfield_bit_size,
738                                  uint32_t bitfield_bit_offset,
739                                  ExecutionContextScope *exe_scope) {
740   if (!IsValid())
741     return false;
742   return m_type_system->DumpTypeValue(m_type, s, format, data, byte_offset,
743                                       byte_size, bitfield_bit_size,
744                                       bitfield_bit_offset, exe_scope);
745 }
746 
747 void CompilerType::DumpSummary(ExecutionContext *exe_ctx, Stream *s,
748                                const DataExtractor &data,
749                                lldb::offset_t data_byte_offset,
750                                size_t data_byte_size) {
751   if (IsValid())
752     m_type_system->DumpSummary(m_type, exe_ctx, s, data, data_byte_offset,
753                                data_byte_size);
754 }
755 
756 void CompilerType::DumpTypeDescription() const {
757   if (IsValid())
758     m_type_system->DumpTypeDescription(m_type);
759 }
760 
761 void CompilerType::DumpTypeDescription(Stream *s) const {
762   if (IsValid()) {
763     m_type_system->DumpTypeDescription(m_type, s);
764   }
765 }
766 
767 #ifndef NDEBUG
768 LLVM_DUMP_METHOD void CompilerType::dump() const {
769   if (IsValid())
770     m_type_system->dump(m_type);
771   else
772     llvm::errs() << "<invalid>\n";
773 }
774 #endif
775 
776 bool CompilerType::GetValueAsScalar(const lldb_private::DataExtractor &data,
777                                     lldb::offset_t data_byte_offset,
778                                     size_t data_byte_size,
779                                     Scalar &value) const {
780   if (!IsValid())
781     return false;
782 
783   if (IsAggregateType()) {
784     return false; // Aggregate types don't have scalar values
785   } else {
786     uint64_t count = 0;
787     lldb::Encoding encoding = GetEncoding(count);
788 
789     if (encoding == lldb::eEncodingInvalid || count != 1)
790       return false;
791 
792     llvm::Optional<uint64_t> byte_size = GetByteSize(nullptr);
793     if (!byte_size)
794       return false;
795     lldb::offset_t offset = data_byte_offset;
796     switch (encoding) {
797     case lldb::eEncodingInvalid:
798       break;
799     case lldb::eEncodingVector:
800       break;
801     case lldb::eEncodingUint:
802       if (*byte_size <= sizeof(unsigned long long)) {
803         uint64_t uval64 = data.GetMaxU64(&offset, *byte_size);
804         if (*byte_size <= sizeof(unsigned int)) {
805           value = (unsigned int)uval64;
806           return true;
807         } else if (*byte_size <= sizeof(unsigned long)) {
808           value = (unsigned long)uval64;
809           return true;
810         } else if (*byte_size <= sizeof(unsigned long long)) {
811           value = (unsigned long long)uval64;
812           return true;
813         } else
814           value.Clear();
815       }
816       break;
817 
818     case lldb::eEncodingSint:
819       if (*byte_size <= sizeof(long long)) {
820         int64_t sval64 = data.GetMaxS64(&offset, *byte_size);
821         if (*byte_size <= sizeof(int)) {
822           value = (int)sval64;
823           return true;
824         } else if (*byte_size <= sizeof(long)) {
825           value = (long)sval64;
826           return true;
827         } else if (*byte_size <= sizeof(long long)) {
828           value = (long long)sval64;
829           return true;
830         } else
831           value.Clear();
832       }
833       break;
834 
835     case lldb::eEncodingIEEE754:
836       if (*byte_size <= sizeof(long double)) {
837         uint32_t u32;
838         uint64_t u64;
839         if (*byte_size == sizeof(float)) {
840           if (sizeof(float) == sizeof(uint32_t)) {
841             u32 = data.GetU32(&offset);
842             value = *((float *)&u32);
843             return true;
844           } else if (sizeof(float) == sizeof(uint64_t)) {
845             u64 = data.GetU64(&offset);
846             value = *((float *)&u64);
847             return true;
848           }
849         } else if (*byte_size == sizeof(double)) {
850           if (sizeof(double) == sizeof(uint32_t)) {
851             u32 = data.GetU32(&offset);
852             value = *((double *)&u32);
853             return true;
854           } else if (sizeof(double) == sizeof(uint64_t)) {
855             u64 = data.GetU64(&offset);
856             value = *((double *)&u64);
857             return true;
858           }
859         } else if (*byte_size == sizeof(long double)) {
860           if (sizeof(long double) == sizeof(uint32_t)) {
861             u32 = data.GetU32(&offset);
862             value = *((long double *)&u32);
863             return true;
864           } else if (sizeof(long double) == sizeof(uint64_t)) {
865             u64 = data.GetU64(&offset);
866             value = *((long double *)&u64);
867             return true;
868           }
869         }
870       }
871       break;
872     }
873   }
874   return false;
875 }
876 
877 bool lldb_private::operator==(const lldb_private::CompilerType &lhs,
878                               const lldb_private::CompilerType &rhs) {
879   return lhs.GetTypeSystem() == rhs.GetTypeSystem() &&
880          lhs.GetOpaqueQualType() == rhs.GetOpaqueQualType();
881 }
882 
883 bool lldb_private::operator!=(const lldb_private::CompilerType &lhs,
884                               const lldb_private::CompilerType &rhs) {
885   return !(lhs == rhs);
886 }
887