LibStdcpp.cpp revision 32d7ee3d2969211e104a27fcfcd636f249b26559 
1//===-- LibStdcpp.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 "lldb/DataFormatters/CXXFormatterFunctions.h"
11
12#include "lldb/Core/DataBufferHeap.h"
13#include "lldb/Core/Error.h"
14#include "lldb/Core/Stream.h"
15#include "lldb/Core/ValueObject.h"
16#include "lldb/Core/ValueObjectConstResult.h"
17#include "lldb/Host/Endian.h"
18#include "lldb/Symbol/ClangASTContext.h"
19#include "lldb/Target/ObjCLanguageRuntime.h"
20#include "lldb/Target/Target.h"
21
22using namespace lldb;
23using namespace lldb_private;
24using namespace lldb_private::formatters;
25
26lldb_private::formatters::LibstdcppVectorBoolSyntheticFrontEnd::LibstdcppVectorBoolSyntheticFrontEnd (lldb::ValueObjectSP valobj_sp) :
27SyntheticChildrenFrontEnd(*valobj_sp.get()),
28m_exe_ctx_ref(),
29m_count(0),
30m_base_data_address(0),
31m_options()
32{
33    if (valobj_sp)
34        Update();
35    m_options.SetCoerceToId(false)
36    .SetUnwindOnError(true)
37    .SetKeepInMemory(true)
38    .SetUseDynamic(lldb::eDynamicCanRunTarget);
39}
40
41size_t
42lldb_private::formatters::LibstdcppVectorBoolSyntheticFrontEnd::CalculateNumChildren ()
43{
44    return m_count;
45}
46
47lldb::ValueObjectSP
48lldb_private::formatters::LibstdcppVectorBoolSyntheticFrontEnd::GetChildAtIndex (size_t idx)
49{
50    if (idx >= m_count)
51        return ValueObjectSP();
52    if (m_base_data_address == 0 || m_count == 0)
53        return ValueObjectSP();
54    size_t byte_idx = (idx >> 3); // divide by 8 to get byte index
55    size_t bit_index = (idx & 7); // efficient idx % 8 for bit index
56    lldb::addr_t byte_location = m_base_data_address + byte_idx;
57    ProcessSP process_sp(m_exe_ctx_ref.GetProcessSP());
58    if (!process_sp)
59        return ValueObjectSP();
60    uint8_t byte = 0;
61    uint8_t mask = 0;
62    Error err;
63    size_t bytes_read = process_sp->ReadMemory(byte_location, &byte, 1, err);
64    if (err.Fail() || bytes_read == 0)
65        return ValueObjectSP();
66    switch (bit_index)
67    {
68        case 0:
69            mask = 1; break;
70        case 1:
71            mask = 2; break;
72        case 2:
73            mask = 4; break;
74        case 3:
75            mask = 8; break;
76        case 4:
77            mask = 16; break;
78        case 5:
79            mask = 32; break;
80        case 6:
81            mask = 64; break;
82        case 7:
83            mask = 128; break;
84        default:
85            return ValueObjectSP();
86    }
87    bool bit_set = ((byte & mask) != 0);
88    Target& target(process_sp->GetTarget());
89    ValueObjectSP retval_sp;
90    if (bit_set)
91        target.EvaluateExpression("(bool)true", NULL, retval_sp);
92    else
93        target.EvaluateExpression("(bool)false", NULL, retval_sp);
94    StreamString name; name.Printf("[%zu]",idx);
95    if (retval_sp)
96        retval_sp->SetName(ConstString(name.GetData()));
97    return retval_sp;
98}
99
100/*((std::vector<std::allocator<bool> >) vBool = {
101 (std::_Bvector_base<std::allocator<bool> >) std::_Bvector_base<std::allocator<bool> > = {
102 (std::_Bvector_base<std::allocator<bool> >::_Bvector_impl) _M_impl = {
103 (std::_Bit_iterator) _M_start = {
104 (std::_Bit_iterator_base) std::_Bit_iterator_base = {
105 (_Bit_type *) _M_p = 0x0016b160
106 (unsigned int) _M_offset = 0
107 }
108 }
109 (std::_Bit_iterator) _M_finish = {
110 (std::_Bit_iterator_base) std::_Bit_iterator_base = {
111 (_Bit_type *) _M_p = 0x0016b16c
112 (unsigned int) _M_offset = 16
113 }
114 }
115 (_Bit_type *) _M_end_of_storage = 0x0016b170
116 }
117 }
118 }
119 */
120
121bool
122lldb_private::formatters::LibstdcppVectorBoolSyntheticFrontEnd::Update()
123{
124    ValueObjectSP valobj_sp = m_backend.GetSP();
125    if (!valobj_sp)
126        return false;
127    if (!valobj_sp)
128        return false;
129    m_exe_ctx_ref = valobj_sp->GetExecutionContextRef();
130
131    ValueObjectSP m_impl_sp(valobj_sp->GetChildMemberWithName(ConstString("_M_impl"), true));
132    if (!m_impl_sp)
133        return false;
134
135    ValueObjectSP m_start_sp(m_impl_sp->GetChildMemberWithName(ConstString("_M_start"), true));
136    ValueObjectSP m_finish_sp(m_impl_sp->GetChildMemberWithName(ConstString("_M_finish"), true));
137
138    ValueObjectSP start_p_sp, finish_p_sp, finish_offset_sp;
139
140    if (!m_start_sp || !m_finish_sp)
141        return false;
142
143    start_p_sp = m_start_sp->GetChildMemberWithName(ConstString("_M_p"), true);
144    finish_p_sp = m_finish_sp->GetChildMemberWithName(ConstString("_M_p"), true);
145    finish_offset_sp = m_finish_sp->GetChildMemberWithName(ConstString("_M_offset"), true);
146
147    if (!start_p_sp || !finish_offset_sp || !finish_p_sp)
148        return false;
149
150    m_base_data_address = start_p_sp->GetValueAsUnsigned(0);
151    if (!m_base_data_address)
152        return false;
153
154    lldb::addr_t end_data_address(finish_p_sp->GetValueAsUnsigned(0));
155    if (!end_data_address)
156        return false;
157
158    if (end_data_address < m_base_data_address)
159        return false;
160    else
161        m_count = finish_offset_sp->GetValueAsUnsigned(0) + (end_data_address-m_base_data_address)*8;
162
163    return true;
164}
165
166bool
167lldb_private::formatters::LibstdcppVectorBoolSyntheticFrontEnd::MightHaveChildren ()
168{
169    return true;
170}
171
172size_t
173lldb_private::formatters::LibstdcppVectorBoolSyntheticFrontEnd::GetIndexOfChildWithName (const ConstString &name)
174{
175    if (!m_count || !m_base_data_address)
176        return UINT32_MAX;
177    const char* item_name = name.GetCString();
178    uint32_t idx = ExtractIndexFromString(item_name);
179    if (idx < UINT32_MAX && idx >= CalculateNumChildren())
180        return UINT32_MAX;
181    return idx;
182}
183
184lldb_private::formatters::LibstdcppVectorBoolSyntheticFrontEnd::~LibstdcppVectorBoolSyntheticFrontEnd ()
185{}
186
187SyntheticChildrenFrontEnd*
188lldb_private::formatters::LibstdcppVectorBoolSyntheticFrontEndCreator (CXXSyntheticChildren*, lldb::ValueObjectSP valobj_sp)
189{
190    if (!valobj_sp)
191        return NULL;
192    return (new LibstdcppVectorBoolSyntheticFrontEnd(valobj_sp));
193}
194
195/*
196 (std::_Rb_tree_iterator<std::pair<const int, std::basic_string<char, std::char_traits<char>, std::allocator<char> > > >) ibeg = {
197 (_Base_ptr) _M_node = 0x0000000100103910 {
198 (std::_Rb_tree_color) _M_color = _S_black
199 (std::_Rb_tree_node_base::_Base_ptr) _M_parent = 0x00000001001038c0
200 (std::_Rb_tree_node_base::_Base_ptr) _M_left = 0x0000000000000000
201 (std::_Rb_tree_node_base::_Base_ptr) _M_right = 0x0000000000000000
202 }
203 }
204 */
205
206lldb_private::formatters::LibstdcppMapIteratorSyntheticFrontEnd::LibstdcppMapIteratorSyntheticFrontEnd (lldb::ValueObjectSP valobj_sp) :
207SyntheticChildrenFrontEnd(*valobj_sp.get()),
208m_exe_ctx_ref(),
209m_pair_address(0),
210m_pair_type(),
211m_options(),
212m_pair_sp()
213{
214    if (valobj_sp)
215        Update();
216    m_options.SetCoerceToId(false)
217    .SetUnwindOnError(true)
218    .SetKeepInMemory(true)
219    .SetUseDynamic(lldb::eDynamicCanRunTarget);
220}
221
222bool
223lldb_private::formatters::LibstdcppMapIteratorSyntheticFrontEnd::Update()
224{
225    ValueObjectSP valobj_sp = m_backend.GetSP();
226    if (!valobj_sp)
227        return false;
228
229    TargetSP target_sp(valobj_sp->GetTargetSP());
230
231    if (!target_sp)
232        return false;
233
234    bool is_64bit = (target_sp->GetArchitecture().GetAddressByteSize() == 8);
235
236    if (!valobj_sp)
237        return false;
238    m_exe_ctx_ref = valobj_sp->GetExecutionContextRef();
239
240    ValueObjectSP _M_node_sp(valobj_sp->GetChildMemberWithName(ConstString("_M_node"), true));
241    if (!_M_node_sp)
242        return false;
243
244    m_pair_address = _M_node_sp->GetValueAsUnsigned(0);
245    if (m_pair_address == 0)
246        return false;
247
248    m_pair_address += (is_64bit ? 32 : 16);
249
250    ClangASTType my_type(valobj_sp->GetClangAST(),valobj_sp->GetClangType());
251    if (ClangASTContext::GetNumTemplateArguments(valobj_sp->GetClangAST(),valobj_sp->GetClangType()) >= 1)
252    {
253        TemplateArgumentKind kind;
254        clang_type_t pair_type = ClangASTContext::GetTemplateArgument(valobj_sp->GetClangAST(),valobj_sp->GetClangType(), 0, kind);
255        if (kind != eTemplateArgumentKindType && kind != eTemplateArgumentKindTemplate && kind != eTemplateArgumentKindTemplateExpansion)
256            return false;
257        m_pair_type = ClangASTType(valobj_sp->GetClangAST(),pair_type);
258    }
259    else
260        return false;
261
262    return true;
263}
264
265size_t
266lldb_private::formatters::LibstdcppMapIteratorSyntheticFrontEnd::CalculateNumChildren ()
267{
268    return 2;
269}
270
271lldb::ValueObjectSP
272lldb_private::formatters::LibstdcppMapIteratorSyntheticFrontEnd::GetChildAtIndex (size_t idx)
273{
274    if (m_pair_address == 0)
275        return lldb::ValueObjectSP();
276    if (m_pair_type.GetASTContext() == NULL ||
277        m_pair_type.GetOpaqueQualType() == NULL)
278        return lldb::ValueObjectSP();
279    if (!m_pair_sp)
280        m_pair_sp = ValueObject::CreateValueObjectFromAddress("pair", m_pair_address, m_exe_ctx_ref, m_pair_type);
281    if (m_pair_sp)
282        return m_pair_sp->GetChildAtIndex(idx, true);
283    return lldb::ValueObjectSP();
284}
285
286bool
287lldb_private::formatters::LibstdcppMapIteratorSyntheticFrontEnd::MightHaveChildren ()
288{
289    return true;
290}
291
292size_t
293lldb_private::formatters::LibstdcppMapIteratorSyntheticFrontEnd::GetIndexOfChildWithName (const ConstString &name)
294{
295    if (name == ConstString("first"))
296        return 0;
297    if (name == ConstString("second"))
298        return 1;
299    return UINT32_MAX;
300}
301
302lldb_private::formatters::LibstdcppMapIteratorSyntheticFrontEnd::~LibstdcppMapIteratorSyntheticFrontEnd ()
303{}
304
305SyntheticChildrenFrontEnd*
306lldb_private::formatters::LibstdcppMapIteratorSyntheticFrontEndCreator (CXXSyntheticChildren*, lldb::ValueObjectSP valobj_sp)
307{
308    if (!valobj_sp)
309        return NULL;
310    return (new LibstdcppMapIteratorSyntheticFrontEnd(valobj_sp));
311}
312
313/*
314 (lldb) fr var ibeg --ptr-depth 1
315 (__gnu_cxx::__normal_iterator<int *, std::vector<int, std::allocator<int> > >) ibeg = {
316 _M_current = 0x00000001001037a0 {
317 *_M_current = 1
318 }
319 }
320 */
321
322SyntheticChildrenFrontEnd*
323lldb_private::formatters::LibStdcppVectorIteratorSyntheticFrontEndCreator (CXXSyntheticChildren*, lldb::ValueObjectSP valobj_sp)
324{
325    static ConstString g_item_name;
326    if (!g_item_name)
327        g_item_name.SetCString("_M_current");
328    if (!valobj_sp)
329        return NULL;
330    return (new VectorIteratorSyntheticFrontEnd(valobj_sp,g_item_name));
331}
332