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Jim Ingham78a685a2011-04-16 00:01:13 +00001//===-- ValueObjectDynamicValue.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
11#include "lldb/Core/ValueObjectDynamicValue.h"
12
13// C Includes
14// C++ Includes
15// Other libraries and framework includes
16// Project includes
Enrico Granatad2284832012-10-17 22:23:56 +000017#include "lldb/Core/Log.h"
Jim Ingham78a685a2011-04-16 00:01:13 +000018#include "lldb/Core/Module.h"
19#include "lldb/Core/ValueObjectList.h"
20#include "lldb/Core/Value.h"
21#include "lldb/Core/ValueObject.h"
22
Greg Claytona1e5dc82015-08-11 22:53:00 +000023#include "lldb/Symbol/CompilerType.h"
Jim Ingham78a685a2011-04-16 00:01:13 +000024#include "lldb/Symbol/ObjectFile.h"
25#include "lldb/Symbol/SymbolContext.h"
26#include "lldb/Symbol/Type.h"
27#include "lldb/Symbol/Variable.h"
28
29#include "lldb/Target/ExecutionContext.h"
30#include "lldb/Target/LanguageRuntime.h"
31#include "lldb/Target/Process.h"
32#include "lldb/Target/RegisterContext.h"
33#include "lldb/Target/Target.h"
34#include "lldb/Target/Thread.h"
35
Jim Ingham78a685a2011-04-16 00:01:13 +000036using namespace lldb_private;
37
Jim Ingham2837b762011-05-04 03:43:18 +000038ValueObjectDynamicValue::ValueObjectDynamicValue (ValueObject &parent, lldb::DynamicValueType use_dynamic) :
Jim Ingham78a685a2011-04-16 00:01:13 +000039 ValueObject(parent),
40 m_address (),
Enrico Granataf7b1a342013-01-23 01:17:27 +000041 m_dynamic_type_info(),
Jim Ingham2837b762011-05-04 03:43:18 +000042 m_use_dynamic (use_dynamic)
Jim Ingham78a685a2011-04-16 00:01:13 +000043{
Enrico Granata6f3533f2011-07-29 19:53:35 +000044 SetName (parent.GetName());
Jim Ingham78a685a2011-04-16 00:01:13 +000045}
46
47ValueObjectDynamicValue::~ValueObjectDynamicValue()
48{
49 m_owning_valobj_sp.reset();
50}
51
Greg Claytona1e5dc82015-08-11 22:53:00 +000052CompilerType
Greg Clayton99558cc42015-08-24 23:46:31 +000053ValueObjectDynamicValue::GetCompilerTypeImpl ()
Jim Ingham78a685a2011-04-16 00:01:13 +000054{
Enrico Granatadc4db5a2013-10-29 00:28:35 +000055 const bool success = UpdateValueIfNeeded(false);
56 if (success)
57 {
58 if (m_dynamic_type_info.HasType())
Greg Clayton99558cc42015-08-24 23:46:31 +000059 return m_value.GetCompilerType();
Enrico Granatadc4db5a2013-10-29 00:28:35 +000060 else
Greg Clayton99558cc42015-08-24 23:46:31 +000061 return m_parent->GetCompilerType();
Enrico Granatadc4db5a2013-10-29 00:28:35 +000062 }
Greg Clayton99558cc42015-08-24 23:46:31 +000063 return m_parent->GetCompilerType();
Jim Ingham78a685a2011-04-16 00:01:13 +000064}
65
66ConstString
67ValueObjectDynamicValue::GetTypeName()
68{
Enrico Granatac3e320a2011-08-02 17:27:39 +000069 const bool success = UpdateValueIfNeeded(false);
Enrico Granataf7b1a342013-01-23 01:17:27 +000070 if (success)
71 {
Enrico Granataf7b1a342013-01-23 01:17:27 +000072 if (m_dynamic_type_info.HasName())
73 return m_dynamic_type_info.GetName();
74 }
75 return m_parent->GetTypeName();
76}
77
Enrico Granatadc4db5a2013-10-29 00:28:35 +000078TypeImpl
79ValueObjectDynamicValue::GetTypeImpl ()
80{
81 const bool success = UpdateValueIfNeeded(false);
Enrico Granatadf7c7f92013-10-29 17:42:02 +000082 if (success && m_type_impl.IsValid())
Enrico Granatadc4db5a2013-10-29 00:28:35 +000083 {
84 return m_type_impl;
85 }
86 return m_parent->GetTypeImpl();
87}
88
Enrico Granataf7b1a342013-01-23 01:17:27 +000089ConstString
90ValueObjectDynamicValue::GetQualifiedTypeName()
91{
92 const bool success = UpdateValueIfNeeded(false);
93 if (success)
94 {
Enrico Granataf7b1a342013-01-23 01:17:27 +000095 if (m_dynamic_type_info.HasName())
96 return m_dynamic_type_info.GetName();
97 }
Enrico Granatae8daa2f2014-05-17 19:14:17 +000098 return m_parent->GetQualifiedTypeName();
99}
100
101ConstString
102ValueObjectDynamicValue::GetDisplayTypeName()
103{
104 const bool success = UpdateValueIfNeeded(false);
105 if (success)
106 {
107 if (m_dynamic_type_info.HasType())
Greg Clayton99558cc42015-08-24 23:46:31 +0000108 return GetCompilerType().GetDisplayTypeName();
Enrico Granatae8daa2f2014-05-17 19:14:17 +0000109 if (m_dynamic_type_info.HasName())
110 return m_dynamic_type_info.GetName();
111 }
112 return m_parent->GetDisplayTypeName();
Jim Ingham78a685a2011-04-16 00:01:13 +0000113}
114
Greg Claytonc7bece562013-01-25 18:06:21 +0000115size_t
Siva Chandra9ac7a6c2015-10-21 19:28:08 +0000116ValueObjectDynamicValue::CalculateNumChildren(uint32_t max)
Jim Ingham78a685a2011-04-16 00:01:13 +0000117{
Enrico Granatac3e320a2011-08-02 17:27:39 +0000118 const bool success = UpdateValueIfNeeded(false);
Enrico Granatadc4db5a2013-10-29 00:28:35 +0000119 if (success && m_dynamic_type_info.HasType())
Siva Chandra9ac7a6c2015-10-21 19:28:08 +0000120 {
121 auto children_count = GetCompilerType().GetNumChildren (true);
122 return children_count <= max ? children_count : max;
123 }
Jim Ingham78a685a2011-04-16 00:01:13 +0000124 else
Siva Chandra9ac7a6c2015-10-21 19:28:08 +0000125 return m_parent->GetNumChildren(max);
Jim Ingham78a685a2011-04-16 00:01:13 +0000126}
127
Greg Claytonfaac1112013-03-14 18:31:44 +0000128uint64_t
Jim Ingham78a685a2011-04-16 00:01:13 +0000129ValueObjectDynamicValue::GetByteSize()
130{
Enrico Granatac3e320a2011-08-02 17:27:39 +0000131 const bool success = UpdateValueIfNeeded(false);
Enrico Granatadc4db5a2013-10-29 00:28:35 +0000132 if (success && m_dynamic_type_info.HasType())
Enrico Granata95438032015-10-14 22:44:30 +0000133 {
134 ExecutionContext exe_ctx (GetExecutionContextRef());
135 return m_value.GetValueByteSize(nullptr, &exe_ctx);
136 }
Jim Ingham78a685a2011-04-16 00:01:13 +0000137 else
138 return m_parent->GetByteSize();
139}
140
141lldb::ValueType
142ValueObjectDynamicValue::GetValueType() const
143{
144 return m_parent->GetValueType();
145}
146
147bool
148ValueObjectDynamicValue::UpdateValue ()
149{
150 SetValueIsValid (false);
151 m_error.Clear();
152
Enrico Granatac3e320a2011-08-02 17:27:39 +0000153 if (!m_parent->UpdateValueIfNeeded(false))
Jim Ingham78a685a2011-04-16 00:01:13 +0000154 {
Greg Clayton007d5be2011-05-30 00:49:24 +0000155 // The dynamic value failed to get an error, pass the error along
156 if (m_error.Success() && m_parent->GetError().Fail())
157 m_error = m_parent->GetError();
Jim Ingham78a685a2011-04-16 00:01:13 +0000158 return false;
159 }
Saleem Abdulrasool324a1032014-04-04 04:06:10 +0000160
Jim Ingham2837b762011-05-04 03:43:18 +0000161 // Setting our type_sp to NULL will route everything back through our
162 // parent which is equivalent to not using dynamic values.
163 if (m_use_dynamic == lldb::eNoDynamicValues)
164 {
Enrico Granataf7b1a342013-01-23 01:17:27 +0000165 m_dynamic_type_info.Clear();
Jim Ingham2837b762011-05-04 03:43:18 +0000166 return true;
167 }
Saleem Abdulrasool324a1032014-04-04 04:06:10 +0000168
Greg Claytoncc4d0142012-02-17 07:49:44 +0000169 ExecutionContext exe_ctx (GetExecutionContextRef());
Greg Claytonc14ee322011-09-22 04:58:26 +0000170 Target *target = exe_ctx.GetTargetPtr();
171 if (target)
Jim Ingham78a685a2011-04-16 00:01:13 +0000172 {
Greg Claytonc14ee322011-09-22 04:58:26 +0000173 m_data.SetByteOrder(target->GetArchitecture().GetByteOrder());
174 m_data.SetAddressByteSize(target->GetArchitecture().GetAddressByteSize());
Jim Ingham78a685a2011-04-16 00:01:13 +0000175 }
Saleem Abdulrasool324a1032014-04-04 04:06:10 +0000176
Jim Ingham78a685a2011-04-16 00:01:13 +0000177 // First make sure our Type and/or Address haven't changed:
Greg Claytoncc4d0142012-02-17 07:49:44 +0000178 Process *process = exe_ctx.GetProcessPtr();
Jim Ingham78a685a2011-04-16 00:01:13 +0000179 if (!process)
180 return false;
Saleem Abdulrasool324a1032014-04-04 04:06:10 +0000181
Jim Ingham61be0902011-05-02 18:13:59 +0000182 TypeAndOrName class_type_or_name;
Jim Ingham78a685a2011-04-16 00:01:13 +0000183 Address dynamic_address;
184 bool found_dynamic_type = false;
Enrico Granata0b6003f2015-09-17 22:56:38 +0000185 Value::ValueType value_type;
Enrico Granatac74275b2015-09-22 19:45:52 +0000186
187 LanguageRuntime *runtime = nullptr;
Saleem Abdulrasool324a1032014-04-04 04:06:10 +0000188
Jim Ingham78a685a2011-04-16 00:01:13 +0000189 lldb::LanguageType known_type = m_parent->GetObjectRuntimeLanguage();
190 if (known_type != lldb::eLanguageTypeUnknown && known_type != lldb::eLanguageTypeC)
191 {
Enrico Granatac74275b2015-09-22 19:45:52 +0000192 runtime = process->GetLanguageRuntime (known_type);
Jim Ingham78a685a2011-04-16 00:01:13 +0000193 if (runtime)
Enrico Granata0b6003f2015-09-17 22:56:38 +0000194 found_dynamic_type = runtime->GetDynamicTypeAndAddress (*m_parent, m_use_dynamic, class_type_or_name, dynamic_address, value_type);
Jim Ingham78a685a2011-04-16 00:01:13 +0000195 }
196 else
197 {
Enrico Granatac74275b2015-09-22 19:45:52 +0000198 runtime = process->GetLanguageRuntime (lldb::eLanguageTypeC_plus_plus);
199 if (runtime)
200 found_dynamic_type = runtime->GetDynamicTypeAndAddress (*m_parent, m_use_dynamic, class_type_or_name, dynamic_address, value_type);
Saleem Abdulrasool324a1032014-04-04 04:06:10 +0000201
Jim Ingham78a685a2011-04-16 00:01:13 +0000202 if (!found_dynamic_type)
203 {
Enrico Granatac74275b2015-09-22 19:45:52 +0000204 runtime = process->GetLanguageRuntime (lldb::eLanguageTypeObjC);
205 if (runtime)
206 found_dynamic_type = runtime->GetDynamicTypeAndAddress (*m_parent, m_use_dynamic, class_type_or_name, dynamic_address, value_type);
Jim Ingham78a685a2011-04-16 00:01:13 +0000207 }
208 }
Saleem Abdulrasool324a1032014-04-04 04:06:10 +0000209
Jim Ingham61be0902011-05-02 18:13:59 +0000210 // Getting the dynamic value may have run the program a bit, and so marked us as needing updating, but we really
211 // don't...
Saleem Abdulrasool324a1032014-04-04 04:06:10 +0000212
Jim Ingham61be0902011-05-02 18:13:59 +0000213 m_update_point.SetUpdated();
Enrico Granatadc4db5a2013-10-29 00:28:35 +0000214
Enrico Granatac74275b2015-09-22 19:45:52 +0000215 if (runtime && found_dynamic_type)
Enrico Granatadc4db5a2013-10-29 00:28:35 +0000216 {
Enrico Granatadf7c7f92013-10-29 17:42:02 +0000217 if (class_type_or_name.HasType())
218 {
Enrico Granatac74275b2015-09-22 19:45:52 +0000219 m_type_impl = TypeImpl(m_parent->GetCompilerType(),
Enrico Granata7eed4872015-09-22 19:58:02 +0000220 runtime->FixUpDynamicType(class_type_or_name, *m_parent).GetCompilerType());
Enrico Granatadf7c7f92013-10-29 17:42:02 +0000221 }
222 else
223 {
224 m_type_impl.Clear();
225 }
226 }
227 else
228 {
229 m_type_impl.Clear();
Enrico Granatadc4db5a2013-10-29 00:28:35 +0000230 }
Saleem Abdulrasool324a1032014-04-04 04:06:10 +0000231
Jim Ingham78a685a2011-04-16 00:01:13 +0000232 // If we don't have a dynamic type, then make ourselves just a echo of our parent.
233 // Or we could return false, and make ourselves an echo of our parent?
234 if (!found_dynamic_type)
235 {
Enrico Granataf7b1a342013-01-23 01:17:27 +0000236 if (m_dynamic_type_info)
Enrico Granata75badc42012-11-27 23:50:00 +0000237 SetValueDidChange(true);
Enrico Granatabd83b872012-11-27 23:28:32 +0000238 ClearDynamicTypeInformation();
Enrico Granataf7b1a342013-01-23 01:17:27 +0000239 m_dynamic_type_info.Clear();
Jim Ingham78a685a2011-04-16 00:01:13 +0000240 m_value = m_parent->GetValue();
Greg Clayton57ee3062013-07-11 22:46:58 +0000241 m_error = m_value.GetValueAsData (&exe_ctx, m_data, 0, GetModule().get());
Jim Ingham78a685a2011-04-16 00:01:13 +0000242 return m_error.Success();
243 }
Saleem Abdulrasool324a1032014-04-04 04:06:10 +0000244
Jim Ingham78a685a2011-04-16 00:01:13 +0000245 Value old_value(m_value);
246
Greg Clayton5160ce52013-03-27 23:08:40 +0000247 Log *log(lldb_private::GetLogIfAllCategoriesSet (LIBLLDB_LOG_TYPES));
Saleem Abdulrasool324a1032014-04-04 04:06:10 +0000248
Enrico Granatae3e91512012-10-22 18:18:36 +0000249 bool has_changed_type = false;
Saleem Abdulrasool324a1032014-04-04 04:06:10 +0000250
Enrico Granataf7b1a342013-01-23 01:17:27 +0000251 if (!m_dynamic_type_info)
Jim Ingham78a685a2011-04-16 00:01:13 +0000252 {
Enrico Granataf7b1a342013-01-23 01:17:27 +0000253 m_dynamic_type_info = class_type_or_name;
Enrico Granatae3e91512012-10-22 18:18:36 +0000254 has_changed_type = true;
Jim Ingham78a685a2011-04-16 00:01:13 +0000255 }
Enrico Granataf7b1a342013-01-23 01:17:27 +0000256 else if (class_type_or_name != m_dynamic_type_info)
Jim Ingham78a685a2011-04-16 00:01:13 +0000257 {
258 // We are another type, we need to tear down our children...
Enrico Granataf7b1a342013-01-23 01:17:27 +0000259 m_dynamic_type_info = class_type_or_name;
Jim Ingham78a685a2011-04-16 00:01:13 +0000260 SetValueDidChange (true);
Enrico Granatae3e91512012-10-22 18:18:36 +0000261 has_changed_type = true;
Jim Ingham78a685a2011-04-16 00:01:13 +0000262 }
Saleem Abdulrasool324a1032014-04-04 04:06:10 +0000263
Enrico Granatae3e91512012-10-22 18:18:36 +0000264 if (has_changed_type)
265 ClearDynamicTypeInformation ();
Saleem Abdulrasool324a1032014-04-04 04:06:10 +0000266
Jim Ingham78a685a2011-04-16 00:01:13 +0000267 if (!m_address.IsValid() || m_address != dynamic_address)
268 {
269 if (m_address.IsValid())
270 SetValueDidChange (true);
Saleem Abdulrasool324a1032014-04-04 04:06:10 +0000271
Jim Ingham78a685a2011-04-16 00:01:13 +0000272 // We've moved, so we should be fine...
273 m_address = dynamic_address;
Greg Claytoncc4d0142012-02-17 07:49:44 +0000274 lldb::TargetSP target_sp (GetTargetSP());
275 lldb::addr_t load_address = m_address.GetLoadAddress(target_sp.get());
Jim Ingham78a685a2011-04-16 00:01:13 +0000276 m_value.GetScalar() = load_address;
277 }
Saleem Abdulrasool324a1032014-04-04 04:06:10 +0000278
Enrico Granatac74275b2015-09-22 19:45:52 +0000279 if (runtime)
Enrico Granata7eed4872015-09-22 19:58:02 +0000280 m_dynamic_type_info = runtime->FixUpDynamicType(m_dynamic_type_info, *m_parent);
Saleem Abdulrasool324a1032014-04-04 04:06:10 +0000281
Greg Clayton57ee3062013-07-11 22:46:58 +0000282 //m_value.SetContext (Value::eContextTypeClangType, corrected_type);
Greg Clayton99558cc42015-08-24 23:46:31 +0000283 m_value.SetCompilerType (m_dynamic_type_info.GetCompilerType());
Saleem Abdulrasool324a1032014-04-04 04:06:10 +0000284
Enrico Granata0b6003f2015-09-17 22:56:38 +0000285 m_value.SetValueType(value_type);
Jim Ingham78a685a2011-04-16 00:01:13 +0000286
Enrico Granatae3e91512012-10-22 18:18:36 +0000287 if (has_changed_type && log)
Saleem Abdulrasool324a1032014-04-04 04:06:10 +0000288 log->Printf("[%s %p] has a new dynamic type %s", GetName().GetCString(),
289 static_cast<void*>(this), GetTypeName().GetCString());
290
Enrico Granataf7b1a342013-01-23 01:17:27 +0000291 if (m_address.IsValid() && m_dynamic_type_info)
Jim Ingham78a685a2011-04-16 00:01:13 +0000292 {
293 // The variable value is in the Scalar value inside the m_value.
294 // We can point our m_data right to it.
Greg Clayton57ee3062013-07-11 22:46:58 +0000295 m_error = m_value.GetValueAsData (&exe_ctx, m_data, 0, GetModule().get());
Jim Ingham78a685a2011-04-16 00:01:13 +0000296 if (m_error.Success())
297 {
Enrico Granatad07cfd32014-10-08 18:27:36 +0000298 if (!CanProvideValue())
Jim Ingham78a685a2011-04-16 00:01:13 +0000299 {
300 // this value object represents an aggregate type whose
301 // children have values, but this object does not. So we
302 // say we are changed if our location has changed.
303 SetValueDidChange (m_value.GetValueType() != old_value.GetValueType() || m_value.GetScalar() != old_value.GetScalar());
304 }
305
306 SetValueIsValid (true);
307 return true;
308 }
309 }
Saleem Abdulrasool324a1032014-04-04 04:06:10 +0000310
Jim Ingham78a685a2011-04-16 00:01:13 +0000311 // We get here if we've failed above...
312 SetValueIsValid (false);
313 return false;
314}
315
316
317
318bool
319ValueObjectDynamicValue::IsInScope ()
320{
321 return m_parent->IsInScope();
322}
323
Enrico Granata07a4ac22012-05-08 21:25:06 +0000324bool
325ValueObjectDynamicValue::SetValueFromCString (const char *value_str, Error& error)
326{
327 if (!UpdateValueIfNeeded(false))
328 {
329 error.SetErrorString("unable to read value");
330 return false;
331 }
332
333 uint64_t my_value = GetValueAsUnsigned(UINT64_MAX);
334 uint64_t parent_value = m_parent->GetValueAsUnsigned(UINT64_MAX);
335
336 if (my_value == UINT64_MAX || parent_value == UINT64_MAX)
337 {
338 error.SetErrorString("unable to read value");
339 return false;
340 }
341
342 // if we are at an offset from our parent, in order to set ourselves correctly we would need
343 // to change the new value so that it refers to the correct dynamic type. we choose not to deal
344 // with that - if anything more than a value overwrite is required, you should be using the
345 // expression parser instead of the value editing facility
346 if (my_value != parent_value)
347 {
348 // but NULL'ing out a value should always be allowed
349 if (strcmp(value_str,"0"))
350 {
351 error.SetErrorString("unable to modify dynamic value, use 'expression' command");
352 return false;
353 }
354 }
355
356 bool ret_val = m_parent->SetValueFromCString(value_str,error);
357 SetNeedsUpdate();
358 return ret_val;
359}
Sean Callanan389823e2013-04-13 01:21:23 +0000360
361bool
362ValueObjectDynamicValue::SetData (DataExtractor &data, Error &error)
363{
364 if (!UpdateValueIfNeeded(false))
365 {
366 error.SetErrorString("unable to read value");
367 return false;
368 }
369
370 uint64_t my_value = GetValueAsUnsigned(UINT64_MAX);
371 uint64_t parent_value = m_parent->GetValueAsUnsigned(UINT64_MAX);
372
373 if (my_value == UINT64_MAX || parent_value == UINT64_MAX)
374 {
375 error.SetErrorString("unable to read value");
376 return false;
377 }
378
379 // if we are at an offset from our parent, in order to set ourselves correctly we would need
380 // to change the new value so that it refers to the correct dynamic type. we choose not to deal
381 // with that - if anything more than a value overwrite is required, you should be using the
382 // expression parser instead of the value editing facility
383 if (my_value != parent_value)
384 {
385 // but NULL'ing out a value should always be allowed
386 lldb::offset_t offset = 0;
387
388 if (data.GetPointer(&offset) != 0)
389 {
390 error.SetErrorString("unable to modify dynamic value, use 'expression' command");
391 return false;
392 }
393 }
394
395 bool ret_val = m_parent->SetData(data, error);
396 SetNeedsUpdate();
397 return ret_val;
398}
Siva Chandra9851b1f2015-08-18 17:56:06 +0000399
Enrico Granata73e8c4d2015-10-07 02:36:35 +0000400void
401ValueObjectDynamicValue::SetPreferredDisplayLanguage (lldb::LanguageType lang)
402{
403 this->ValueObject::SetPreferredDisplayLanguage(lang);
404 if (m_parent)
405 m_parent->SetPreferredDisplayLanguage(lang);
406}
407
408lldb::LanguageType
409ValueObjectDynamicValue::GetPreferredDisplayLanguage ()
410{
411 if (m_preferred_display_language == lldb::eLanguageTypeUnknown)
412 {
413 if (m_parent)
414 return m_parent->GetPreferredDisplayLanguage();
415 return lldb::eLanguageTypeUnknown;
416 }
417 else
418 return m_preferred_display_language;
419}
420
Siva Chandra9851b1f2015-08-18 17:56:06 +0000421bool
422ValueObjectDynamicValue::GetDeclaration (Declaration &decl)
423{
424 if (m_parent)
425 return m_parent->GetDeclaration(decl);
426
427 return ValueObject::GetDeclaration(decl);
428}
Enrico Granatadc62ffd2015-11-09 19:27:34 +0000429
430uint64_t
431ValueObjectDynamicValue::GetLanguageFlags ()
432{
433 if (m_parent)
434 return m_parent->GetLanguageFlags();
435 return this->ValueObject::GetLanguageFlags();
436}
437
438void
439ValueObjectDynamicValue::SetLanguageFlags (uint64_t flags)
440{
441 if (m_parent)
442 m_parent->SetLanguageFlags(flags);
443 else
444 this->ValueObject::SetLanguageFlags(flags);
445}