blob: 298d124280f67fe1ffa17e3f4df377e6a7d37e6b [file] [log] [blame]
Greg Claytonbb1beaa2013-03-26 18:42:13 +00001//===-- LibCxx.cpp ----------------------------------------------*- C++ -*-===//
Enrico Granataea2bc0f2013-02-21 19:57:10 +00002//
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
Enrico Granata419d7912015-09-04 00:33:51 +000010#include "lldb/DataFormatters/LibCxx.h"
Enrico Granataea2bc0f2013-02-21 19:57:10 +000011
12#include "lldb/Core/DataBufferHeap.h"
Enrico Granata14b74fd2013-05-06 18:55:52 +000013#include "lldb/Core/Debugger.h"
Enrico Granataea2bc0f2013-02-21 19:57:10 +000014#include "lldb/Core/Error.h"
Greg Clayton554f68d2015-02-04 22:00:53 +000015#include "lldb/Core/FormatEntity.h"
Enrico Granataea2bc0f2013-02-21 19:57:10 +000016#include "lldb/Core/Stream.h"
17#include "lldb/Core/ValueObject.h"
18#include "lldb/Core/ValueObjectConstResult.h"
Enrico Granata419d7912015-09-04 00:33:51 +000019#include "lldb/DataFormatters/FormattersHelpers.h"
20#include "lldb/DataFormatters/StringPrinter.h"
21#include "lldb/DataFormatters/TypeSummary.h"
22#include "lldb/DataFormatters/VectorIterator.h"
Enrico Granataea2bc0f2013-02-21 19:57:10 +000023#include "lldb/Host/Endian.h"
24#include "lldb/Symbol/ClangASTContext.h"
Enrico Granataea2bc0f2013-02-21 19:57:10 +000025#include "lldb/Target/Target.h"
26
27using namespace lldb;
28using namespace lldb_private;
29using namespace lldb_private::formatters;
30
Enrico Granata0dba9b32014-01-08 01:36:59 +000031bool
Enrico Granataf35bc632014-11-06 21:55:30 +000032lldb_private::formatters::LibcxxSmartPointerSummaryProvider (ValueObject& valobj, Stream& stream, const TypeSummaryOptions& options)
Enrico Granata0dba9b32014-01-08 01:36:59 +000033{
34 ValueObjectSP valobj_sp(valobj.GetNonSyntheticValue());
35 if (!valobj_sp)
36 return false;
37 ValueObjectSP ptr_sp(valobj_sp->GetChildMemberWithName(ConstString("__ptr_"), true));
38 ValueObjectSP count_sp(valobj_sp->GetChildAtNamePath( {ConstString("__cntrl_"),ConstString("__shared_owners_")} ));
39 ValueObjectSP weakcount_sp(valobj_sp->GetChildAtNamePath( {ConstString("__cntrl_"),ConstString("__shared_weak_owners_")} ));
40
41 if (!ptr_sp)
42 return false;
43
44 if (ptr_sp->GetValueAsUnsigned(0) == 0)
45 {
46 stream.Printf("nullptr");
47 return true;
48 }
49 else
50 {
51 bool print_pointee = false;
52 Error error;
53 ValueObjectSP pointee_sp = ptr_sp->Dereference(error);
54 if (pointee_sp && error.Success())
55 {
56 if (pointee_sp->DumpPrintableRepresentation(stream,
57 ValueObject::eValueObjectRepresentationStyleSummary,
58 lldb::eFormatInvalid,
59 ValueObject::ePrintableRepresentationSpecialCasesDisable,
60 false))
61 print_pointee = true;
62 }
63 if (!print_pointee)
64 stream.Printf("ptr = 0x%" PRIx64, ptr_sp->GetValueAsUnsigned(0));
65 }
66
67 if (count_sp)
68 stream.Printf(" strong=%" PRIu64, 1+count_sp->GetValueAsUnsigned(0));
69
70 if (weakcount_sp)
71 stream.Printf(" weak=%" PRIu64, 1+weakcount_sp->GetValueAsUnsigned(0));
72
73 return true;
74}
75
Enrico Granataea2bc0f2013-02-21 19:57:10 +000076lldb_private::formatters::LibcxxVectorBoolSyntheticFrontEnd::LibcxxVectorBoolSyntheticFrontEnd (lldb::ValueObjectSP valobj_sp) :
77SyntheticChildrenFrontEnd(*valobj_sp.get()),
Enrico Granata473316f2013-12-21 08:09:49 +000078m_bool_type(),
Enrico Granataea2bc0f2013-02-21 19:57:10 +000079m_exe_ctx_ref(),
80m_count(0),
81m_base_data_address(0),
Enrico Granata473316f2013-12-21 08:09:49 +000082m_children()
Enrico Granataea2bc0f2013-02-21 19:57:10 +000083{
84 if (valobj_sp)
Enrico Granata473316f2013-12-21 08:09:49 +000085 {
Enrico Granataea2bc0f2013-02-21 19:57:10 +000086 Update();
Greg Clayton99558cc42015-08-24 23:46:31 +000087 m_bool_type = valobj_sp->GetCompilerType().GetBasicTypeFromAST(lldb::eBasicTypeBool);
Enrico Granata473316f2013-12-21 08:09:49 +000088 }
Enrico Granataea2bc0f2013-02-21 19:57:10 +000089}
90
91size_t
92lldb_private::formatters::LibcxxVectorBoolSyntheticFrontEnd::CalculateNumChildren ()
93{
94 return m_count;
95}
96
97lldb::ValueObjectSP
98lldb_private::formatters::LibcxxVectorBoolSyntheticFrontEnd::GetChildAtIndex (size_t idx)
99{
Enrico Granata473316f2013-12-21 08:09:49 +0000100 auto iter = m_children.find(idx),
101 end = m_children.end();
102 if (iter != end)
103 return iter->second;
Enrico Granataea2bc0f2013-02-21 19:57:10 +0000104 if (idx >= m_count)
105 return ValueObjectSP();
106 if (m_base_data_address == 0 || m_count == 0)
107 return ValueObjectSP();
Enrico Granata473316f2013-12-21 08:09:49 +0000108 if (!m_bool_type)
109 return ValueObjectSP();
Enrico Granataea2bc0f2013-02-21 19:57:10 +0000110 size_t byte_idx = (idx >> 3); // divide by 8 to get byte index
111 size_t bit_index = (idx & 7); // efficient idx % 8 for bit index
112 lldb::addr_t byte_location = m_base_data_address + byte_idx;
113 ProcessSP process_sp(m_exe_ctx_ref.GetProcessSP());
114 if (!process_sp)
115 return ValueObjectSP();
116 uint8_t byte = 0;
117 uint8_t mask = 0;
118 Error err;
119 size_t bytes_read = process_sp->ReadMemory(byte_location, &byte, 1, err);
120 if (err.Fail() || bytes_read == 0)
121 return ValueObjectSP();
122 switch (bit_index)
123 {
124 case 0:
125 mask = 1; break;
126 case 1:
127 mask = 2; break;
128 case 2:
129 mask = 4; break;
130 case 3:
131 mask = 8; break;
132 case 4:
133 mask = 16; break;
134 case 5:
135 mask = 32; break;
136 case 6:
137 mask = 64; break;
138 case 7:
139 mask = 128; break;
140 default:
141 return ValueObjectSP();
142 }
143 bool bit_set = ((byte & mask) != 0);
Enrico Granata1cd5e922015-01-28 00:07:51 +0000144 DataBufferSP buffer_sp(new DataBufferHeap(m_bool_type.GetByteSize(nullptr),0));
Enrico Granata473316f2013-12-21 08:09:49 +0000145 if (bit_set && buffer_sp && buffer_sp->GetBytes())
146 *(buffer_sp->GetBytes()) = 1; // regardless of endianness, anything non-zero is true
Deepak Panickal99fbc072014-03-03 15:39:47 +0000147 StreamString name; name.Printf("[%" PRIu64 "]", (uint64_t)idx);
Enrico Granatae29df232014-12-09 19:51:20 +0000148 ValueObjectSP retval_sp(CreateValueObjectFromData(name.GetData(), DataExtractor(buffer_sp, process_sp->GetByteOrder(), process_sp->GetAddressByteSize()), m_exe_ctx_ref, m_bool_type));
Enrico Granataea2bc0f2013-02-21 19:57:10 +0000149 if (retval_sp)
Enrico Granata473316f2013-12-21 08:09:49 +0000150 m_children[idx] = retval_sp;
Enrico Granataea2bc0f2013-02-21 19:57:10 +0000151 return retval_sp;
152}
153
154/*(std::__1::vector<std::__1::allocator<bool> >) vBool = {
155 __begin_ = 0x00000001001000e0
156 __size_ = 56
157 __cap_alloc_ = {
158 std::__1::__libcpp_compressed_pair_imp<unsigned long, std::__1::allocator<unsigned long> > = {
159 __first_ = 1
160 }
161 }
162 }*/
163
164bool
165lldb_private::formatters::LibcxxVectorBoolSyntheticFrontEnd::Update()
166{
Enrico Granata473316f2013-12-21 08:09:49 +0000167 m_children.clear();
Enrico Granataea2bc0f2013-02-21 19:57:10 +0000168 ValueObjectSP valobj_sp = m_backend.GetSP();
169 if (!valobj_sp)
170 return false;
Enrico Granataea2bc0f2013-02-21 19:57:10 +0000171 m_exe_ctx_ref = valobj_sp->GetExecutionContextRef();
172 ValueObjectSP size_sp(valobj_sp->GetChildMemberWithName(ConstString("__size_"), true));
173 if (!size_sp)
174 return false;
175 m_count = size_sp->GetValueAsUnsigned(0);
176 if (!m_count)
177 return true;
178 ValueObjectSP begin_sp(valobj_sp->GetChildMemberWithName(ConstString("__begin_"), true));
179 if (!begin_sp)
180 {
181 m_count = 0;
182 return false;
183 }
184 m_base_data_address = begin_sp->GetValueAsUnsigned(0);
185 if (!m_base_data_address)
186 {
187 m_count = 0;
188 return false;
189 }
Enrico Granata92373532013-03-19 22:58:48 +0000190 return false;
Enrico Granataea2bc0f2013-02-21 19:57:10 +0000191}
192
193bool
194lldb_private::formatters::LibcxxVectorBoolSyntheticFrontEnd::MightHaveChildren ()
195{
196 return true;
197}
198
199size_t
200lldb_private::formatters::LibcxxVectorBoolSyntheticFrontEnd::GetIndexOfChildWithName (const ConstString &name)
201{
202 if (!m_count || !m_base_data_address)
203 return UINT32_MAX;
204 const char* item_name = name.GetCString();
205 uint32_t idx = ExtractIndexFromString(item_name);
206 if (idx < UINT32_MAX && idx >= CalculateNumChildren())
207 return UINT32_MAX;
208 return idx;
209}
210
211lldb_private::formatters::LibcxxVectorBoolSyntheticFrontEnd::~LibcxxVectorBoolSyntheticFrontEnd ()
212{}
213
214SyntheticChildrenFrontEnd*
215lldb_private::formatters::LibcxxVectorBoolSyntheticFrontEndCreator (CXXSyntheticChildren*, lldb::ValueObjectSP valobj_sp)
216{
217 if (!valobj_sp)
218 return NULL;
219 return (new LibcxxVectorBoolSyntheticFrontEnd(valobj_sp));
220}
221
222/*
223 (lldb) fr var ibeg --raw --ptr-depth 1
224 (std::__1::__map_iterator<std::__1::__tree_iterator<std::__1::pair<int, std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> > >, std::__1::__tree_node<std::__1::pair<int, std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> > >, void *> *, long> >) ibeg = {
225 __i_ = {
226 __ptr_ = 0x0000000100103870 {
227 std::__1::__tree_node_base<void *> = {
228 std::__1::__tree_end_node<std::__1::__tree_node_base<void *> *> = {
229 __left_ = 0x0000000000000000
230 }
231 __right_ = 0x0000000000000000
232 __parent_ = 0x00000001001038b0
233 __is_black_ = true
234 }
235 __value_ = {
236 first = 0
237 second = { std::string }
238 */
239
240lldb_private::formatters::LibCxxMapIteratorSyntheticFrontEnd::LibCxxMapIteratorSyntheticFrontEnd (lldb::ValueObjectSP valobj_sp) :
241SyntheticChildrenFrontEnd(*valobj_sp.get()),
242m_pair_ptr()
243{
244 if (valobj_sp)
245 Update();
246}
247
248bool
249lldb_private::formatters::LibCxxMapIteratorSyntheticFrontEnd::Update()
250{
251 ValueObjectSP valobj_sp = m_backend.GetSP();
252 if (!valobj_sp)
253 return false;
254
255 TargetSP target_sp(valobj_sp->GetTargetSP());
256
257 if (!target_sp)
258 return false;
259
260 if (!valobj_sp)
261 return false;
262
263 // this must be a ValueObject* because it is a child of the ValueObject we are producing children for
264 // it if were a ValueObjectSP, we would end up with a loop (iterator -> synthetic -> child -> parent == iterator)
265 // and that would in turn leak memory by never allowing the ValueObjects to die and free their memory
266 m_pair_ptr = valobj_sp->GetValueForExpressionPath(".__i_.__ptr_->__value_",
267 NULL,
268 NULL,
269 NULL,
Enrico Granata495dccd2015-03-12 22:17:07 +0000270 ValueObject::GetValueForExpressionPathOptions().DontCheckDotVsArrowSyntax().SetSyntheticChildrenTraversal(ValueObject::GetValueForExpressionPathOptions::SyntheticChildrenTraversal::None),
Enrico Granataea2bc0f2013-02-21 19:57:10 +0000271 NULL).get();
272
Enrico Granata92373532013-03-19 22:58:48 +0000273 return false;
Enrico Granataea2bc0f2013-02-21 19:57:10 +0000274}
275
276size_t
277lldb_private::formatters::LibCxxMapIteratorSyntheticFrontEnd::CalculateNumChildren ()
278{
279 return 2;
280}
281
282lldb::ValueObjectSP
283lldb_private::formatters::LibCxxMapIteratorSyntheticFrontEnd::GetChildAtIndex (size_t idx)
284{
285 if (!m_pair_ptr)
286 return lldb::ValueObjectSP();
287 return m_pair_ptr->GetChildAtIndex(idx, true);
288}
289
290bool
291lldb_private::formatters::LibCxxMapIteratorSyntheticFrontEnd::MightHaveChildren ()
292{
293 return true;
294}
295
296size_t
297lldb_private::formatters::LibCxxMapIteratorSyntheticFrontEnd::GetIndexOfChildWithName (const ConstString &name)
298{
299 if (name == ConstString("first"))
300 return 0;
301 if (name == ConstString("second"))
302 return 1;
303 return UINT32_MAX;
304}
305
306lldb_private::formatters::LibCxxMapIteratorSyntheticFrontEnd::~LibCxxMapIteratorSyntheticFrontEnd ()
307{
308 // this will be deleted when its parent dies (since it's a child object)
309 //delete m_pair_ptr;
310}
311
312SyntheticChildrenFrontEnd*
313lldb_private::formatters::LibCxxMapIteratorSyntheticFrontEndCreator (CXXSyntheticChildren*, lldb::ValueObjectSP valobj_sp)
314{
315 if (!valobj_sp)
316 return NULL;
317 return (new LibCxxMapIteratorSyntheticFrontEnd(valobj_sp));
318}
319
320/*
321 (lldb) fr var ibeg --raw --ptr-depth 1 -T
322 (std::__1::__wrap_iter<int *>) ibeg = {
323 (std::__1::__wrap_iter<int *>::iterator_type) __i = 0x00000001001037a0 {
324 (int) *__i = 1
325 }
326 }
327*/
328
329SyntheticChildrenFrontEnd*
330lldb_private::formatters::LibCxxVectorIteratorSyntheticFrontEndCreator (CXXSyntheticChildren*, lldb::ValueObjectSP valobj_sp)
331{
332 static ConstString g_item_name;
333 if (!g_item_name)
334 g_item_name.SetCString("__i");
335 if (!valobj_sp)
336 return NULL;
337 return (new VectorIteratorSyntheticFrontEnd(valobj_sp,g_item_name));
338}
Enrico Granata92373532013-03-19 22:58:48 +0000339
340lldb_private::formatters::LibcxxSharedPtrSyntheticFrontEnd::LibcxxSharedPtrSyntheticFrontEnd (lldb::ValueObjectSP valobj_sp) :
341SyntheticChildrenFrontEnd(*valobj_sp.get()),
342m_cntrl(NULL),
343m_count_sp(),
344m_weak_count_sp(),
345m_ptr_size(0),
346m_byte_order(lldb::eByteOrderInvalid)
347{
348 if (valobj_sp)
349 Update();
350}
351
352size_t
353lldb_private::formatters::LibcxxSharedPtrSyntheticFrontEnd::CalculateNumChildren ()
354{
355 return (m_cntrl ? 1 : 0);
356}
357
358lldb::ValueObjectSP
359lldb_private::formatters::LibcxxSharedPtrSyntheticFrontEnd::GetChildAtIndex (size_t idx)
360{
361 if (!m_cntrl)
362 return lldb::ValueObjectSP();
363
364 ValueObjectSP valobj_sp = m_backend.GetSP();
365 if (!valobj_sp)
366 return lldb::ValueObjectSP();
367
368 if (idx == 0)
369 return valobj_sp->GetChildMemberWithName(ConstString("__ptr_"), true);
370
371 if (idx > 2)
372 return lldb::ValueObjectSP();
373
374 if (idx == 1)
375 {
376 if (!m_count_sp)
377 {
378 ValueObjectSP shared_owners_sp(m_cntrl->GetChildMemberWithName(ConstString("__shared_owners_"),true));
379 if (!shared_owners_sp)
380 return lldb::ValueObjectSP();
381 uint64_t count = 1 + shared_owners_sp->GetValueAsUnsigned(0);
382 DataExtractor data(&count, 8, m_byte_order, m_ptr_size);
Greg Clayton99558cc42015-08-24 23:46:31 +0000383 m_count_sp = CreateValueObjectFromData("count", data, valobj_sp->GetExecutionContextRef(), shared_owners_sp->GetCompilerType());
Enrico Granata92373532013-03-19 22:58:48 +0000384 }
385 return m_count_sp;
386 }
387 else /* if (idx == 2) */
388 {
389 if (!m_weak_count_sp)
390 {
391 ValueObjectSP shared_weak_owners_sp(m_cntrl->GetChildMemberWithName(ConstString("__shared_weak_owners_"),true));
392 if (!shared_weak_owners_sp)
393 return lldb::ValueObjectSP();
394 uint64_t count = 1 + shared_weak_owners_sp->GetValueAsUnsigned(0);
395 DataExtractor data(&count, 8, m_byte_order, m_ptr_size);
Greg Clayton99558cc42015-08-24 23:46:31 +0000396 m_weak_count_sp = CreateValueObjectFromData("count", data, valobj_sp->GetExecutionContextRef(), shared_weak_owners_sp->GetCompilerType());
Enrico Granata92373532013-03-19 22:58:48 +0000397 }
398 return m_weak_count_sp;
399 }
400}
401
402bool
403lldb_private::formatters::LibcxxSharedPtrSyntheticFrontEnd::Update()
404{
405 m_count_sp.reset();
406 m_weak_count_sp.reset();
407 m_cntrl = NULL;
408
409 ValueObjectSP valobj_sp = m_backend.GetSP();
410 if (!valobj_sp)
411 return false;
412
413 TargetSP target_sp(valobj_sp->GetTargetSP());
414 if (!target_sp)
415 return false;
416
417 m_byte_order = target_sp->GetArchitecture().GetByteOrder();
418 m_ptr_size = target_sp->GetArchitecture().GetAddressByteSize();
419
420 lldb::ValueObjectSP cntrl_sp(valobj_sp->GetChildMemberWithName(ConstString("__cntrl_"),true));
421
422 m_cntrl = cntrl_sp.get(); // need to store the raw pointer to avoid a circular dependency
423 return false;
424}
425
426bool
427lldb_private::formatters::LibcxxSharedPtrSyntheticFrontEnd::MightHaveChildren ()
428{
429 return true;
430}
431
432size_t
433lldb_private::formatters::LibcxxSharedPtrSyntheticFrontEnd::GetIndexOfChildWithName (const ConstString &name)
434{
435 if (name == ConstString("__ptr_"))
436 return 0;
437 if (name == ConstString("count"))
438 return 1;
439 if (name == ConstString("weak_count"))
440 return 2;
441 return UINT32_MAX;
442}
443
444lldb_private::formatters::LibcxxSharedPtrSyntheticFrontEnd::~LibcxxSharedPtrSyntheticFrontEnd ()
445{}
446
447SyntheticChildrenFrontEnd*
448lldb_private::formatters::LibcxxSharedPtrSyntheticFrontEndCreator (CXXSyntheticChildren*, lldb::ValueObjectSP valobj_sp)
449{
450 if (!valobj_sp)
451 return NULL;
452 return (new LibcxxSharedPtrSyntheticFrontEnd(valobj_sp));
453}
454
Enrico Granata14b74fd2013-05-06 18:55:52 +0000455bool
Enrico Granataf35bc632014-11-06 21:55:30 +0000456lldb_private::formatters::LibcxxContainerSummaryProvider (ValueObject& valobj, Stream& stream, const TypeSummaryOptions& options)
Enrico Granata14b74fd2013-05-06 18:55:52 +0000457{
458 if (valobj.IsPointerType())
459 {
460 uint64_t value = valobj.GetValueAsUnsigned(0);
461 if (!value)
462 return false;
Matt Kopecef143712013-06-03 18:00:07 +0000463 stream.Printf("0x%016" PRIx64 " ", value);
Enrico Granata14b74fd2013-05-06 18:55:52 +0000464 }
Greg Clayton554f68d2015-02-04 22:00:53 +0000465 return FormatEntity::FormatStringRef("size=${svar%#}", stream, NULL, NULL, NULL, &valobj, false, false);
Enrico Granata14b74fd2013-05-06 18:55:52 +0000466}
Enrico Granatad87cc312015-09-03 01:29:42 +0000467
468// the field layout in a libc++ string (cap, side, data or data, size, cap)
469enum LibcxxStringLayoutMode
470{
471 eLibcxxStringLayoutModeCSD = 0,
472 eLibcxxStringLayoutModeDSC = 1,
473 eLibcxxStringLayoutModeInvalid = 0xffff
474};
475
476// this function abstracts away the layout and mode details of a libc++ string
477// and returns the address of the data and the size ready for callers to consume
478static bool
479ExtractLibcxxStringInfo (ValueObject& valobj,
480 ValueObjectSP &location_sp,
481 uint64_t& size)
482{
483 ValueObjectSP D(valobj.GetChildAtIndexPath({0,0,0,0}));
484 if (!D)
485 return false;
486
487 ValueObjectSP layout_decider(D->GetChildAtIndexPath({0,0}));
488
489 // this child should exist
490 if (!layout_decider)
491 return false;
492
493 ConstString g_data_name("__data_");
494 ConstString g_size_name("__size_");
495 bool short_mode = false; // this means the string is in short-mode and the data is stored inline
496 LibcxxStringLayoutMode layout = (layout_decider->GetName() == g_data_name) ? eLibcxxStringLayoutModeDSC : eLibcxxStringLayoutModeCSD;
497 uint64_t size_mode_value = 0;
498
499 if (layout == eLibcxxStringLayoutModeDSC)
500 {
501 ValueObjectSP size_mode(D->GetChildAtIndexPath({1,1,0}));
502 if (!size_mode)
503 return false;
504
505 if (size_mode->GetName() != g_size_name)
506 {
507 // we are hitting the padding structure, move along
508 size_mode = D->GetChildAtIndexPath({1,1,1});
509 if (!size_mode)
510 return false;
511 }
512
513 size_mode_value = (size_mode->GetValueAsUnsigned(0));
514 short_mode = ((size_mode_value & 0x80) == 0);
515 }
516 else
517 {
518 ValueObjectSP size_mode(D->GetChildAtIndexPath({1,0,0}));
519 if (!size_mode)
520 return false;
521
522 size_mode_value = (size_mode->GetValueAsUnsigned(0));
523 short_mode = ((size_mode_value & 1) == 0);
524 }
525
526 if (short_mode)
527 {
528 ValueObjectSP s(D->GetChildAtIndex(1, true));
529 if (!s)
530 return false;
531 location_sp = s->GetChildAtIndex((layout == eLibcxxStringLayoutModeDSC) ? 0 : 1, true);
532 size = (layout == eLibcxxStringLayoutModeDSC) ? size_mode_value : ((size_mode_value >> 1) % 256);
533 return (location_sp.get() != nullptr);
534 }
535 else
536 {
537 ValueObjectSP l(D->GetChildAtIndex(0, true));
538 if (!l)
539 return false;
540 // we can use the layout_decider object as the data pointer
541 location_sp = (layout == eLibcxxStringLayoutModeDSC) ? layout_decider : l->GetChildAtIndex(2, true);
542 ValueObjectSP size_vo(l->GetChildAtIndex(1, true));
543 if (!size_vo || !location_sp)
544 return false;
545 size = size_vo->GetValueAsUnsigned(0);
546 return true;
547 }
548}
549
550bool
551lldb_private::formatters::LibcxxWStringSummaryProvider (ValueObject& valobj, Stream& stream, const TypeSummaryOptions& summary_options)
552{
553 uint64_t size = 0;
554 ValueObjectSP location_sp((ValueObject*)nullptr);
555 if (!ExtractLibcxxStringInfo(valobj, location_sp, size))
556 return false;
557 if (size == 0)
558 {
559 stream.Printf("L\"\"");
560 return true;
561 }
562 if (!location_sp)
563 return false;
564
565 DataExtractor extractor;
566 if (summary_options.GetCapping() == TypeSummaryCapping::eTypeSummaryCapped)
567 size = std::min<decltype(size)>(size, valobj.GetTargetSP()->GetMaximumSizeOfStringSummary());
568 location_sp->GetPointeeData(extractor, 0, size);
569
570 // std::wstring::size() is measured in 'characters', not bytes
571 auto wchar_t_size = valobj.GetTargetSP()->GetScratchClangASTContext()->GetBasicType(lldb::eBasicTypeWChar).GetByteSize(nullptr);
572
573 ReadBufferAndDumpToStreamOptions options(valobj);
574 options.SetData(extractor);
575 options.SetStream(&stream);
576 options.SetPrefixToken('L');
577 options.SetQuote('"');
578 options.SetSourceSize(size);
579 options.SetBinaryZeroIsTerminator(false);
580
581 switch (wchar_t_size)
582 {
583 case 1:
584 lldb_private::formatters::ReadBufferAndDumpToStream<lldb_private::formatters::StringElementType::UTF8>(options);
585 break;
586
587 case 2:
588 lldb_private::formatters::ReadBufferAndDumpToStream<lldb_private::formatters::StringElementType::UTF16>(options);
589 break;
590
591 case 4:
592 lldb_private::formatters::ReadBufferAndDumpToStream<lldb_private::formatters::StringElementType::UTF32>(options);
593 break;
594
595 default:
596 stream.Printf("size for wchar_t is not valid");
597 return true;
598 }
599
600 return true;
601}
602
603bool
604lldb_private::formatters::LibcxxStringSummaryProvider (ValueObject& valobj, Stream& stream, const TypeSummaryOptions& summary_options)
605{
606 uint64_t size = 0;
607 ValueObjectSP location_sp((ValueObject*)nullptr);
608
609 if (!ExtractLibcxxStringInfo(valobj, location_sp, size))
610 return false;
611
612 if (size == 0)
613 {
614 stream.Printf("\"\"");
615 return true;
616 }
617
618 if (!location_sp)
619 return false;
620
621 DataExtractor extractor;
622 if (summary_options.GetCapping() == TypeSummaryCapping::eTypeSummaryCapped)
623 size = std::min<decltype(size)>(size, valobj.GetTargetSP()->GetMaximumSizeOfStringSummary());
624 location_sp->GetPointeeData(extractor, 0, size);
625
626 ReadBufferAndDumpToStreamOptions options(valobj);
627 options.SetData(extractor);
628 options.SetStream(&stream);
629 options.SetPrefixToken(0);
630 options.SetQuote('"');
631 options.SetSourceSize(size);
632 options.SetBinaryZeroIsTerminator(false);
633 lldb_private::formatters::ReadBufferAndDumpToStream<lldb_private::formatters::StringElementType::ASCII>(options);
634
635 return true;
636}