LibStdcpp.cpp revision 263367 
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/lldb-python.h"
11
12#include "lldb/DataFormatters/CXXFormatterFunctions.h"
13
14#include "lldb/Core/DataBufferHeap.h"
15#include "lldb/Core/Error.h"
16#include "lldb/Core/Stream.h"
17#include "lldb/Core/ValueObject.h"
18#include "lldb/Core/ValueObjectConstResult.h"
19#include "lldb/Host/Endian.h"
20#include "lldb/Symbol/ClangASTContext.h"
21#include "lldb/Target/ObjCLanguageRuntime.h"
22#include "lldb/Target/Target.h"
23
24using namespace lldb;
25using namespace lldb_private;
26using namespace lldb_private::formatters;
27
28lldb_private::formatters::LibstdcppVectorBoolSyntheticFrontEnd::LibstdcppVectorBoolSyntheticFrontEnd (lldb::ValueObjectSP valobj_sp) :
29SyntheticChildrenFrontEnd(*valobj_sp.get()),
30m_exe_ctx_ref(),
31m_count(0),
32m_base_data_address(0),
33m_options()
34{
35    if (valobj_sp)
36        Update();
37    m_options.SetCoerceToId(false);
38    m_options.SetUnwindOnError(true);
39    m_options.SetKeepInMemory(true);
40    m_options.SetUseDynamic(lldb::eDynamicCanRunTarget);
41}
42
43size_t
44lldb_private::formatters::LibstdcppVectorBoolSyntheticFrontEnd::CalculateNumChildren ()
45{
46    return m_count;
47}
48
49lldb::ValueObjectSP
50lldb_private::formatters::LibstdcppVectorBoolSyntheticFrontEnd::GetChildAtIndex (size_t idx)
51{
52    if (idx >= m_count)
53        return ValueObjectSP();
54    if (m_base_data_address == 0 || m_count == 0)
55        return ValueObjectSP();
56    size_t byte_idx = (idx >> 3); // divide by 8 to get byte index
57    size_t bit_index = (idx & 7); // efficient idx % 8 for bit index
58    lldb::addr_t byte_location = m_base_data_address + byte_idx;
59    ProcessSP process_sp(m_exe_ctx_ref.GetProcessSP());
60    if (!process_sp)
61        return ValueObjectSP();
62    uint8_t byte = 0;
63    uint8_t mask = 0;
64    Error err;
65    size_t bytes_read = process_sp->ReadMemory(byte_location, &byte, 1, err);
66    if (err.Fail() || bytes_read == 0)
67        return ValueObjectSP();
68    switch (bit_index)
69    {
70        case 0:
71            mask = 1; break;
72        case 1:
73            mask = 2; break;
74        case 2:
75            mask = 4; break;
76        case 3:
77            mask = 8; break;
78        case 4:
79            mask = 16; break;
80        case 5:
81            mask = 32; break;
82        case 6:
83            mask = 64; break;
84        case 7:
85            mask = 128; break;
86        default:
87            return ValueObjectSP();
88    }
89    bool bit_set = ((byte & mask) != 0);
90    Target& target(process_sp->GetTarget());
91    ValueObjectSP retval_sp;
92    if (bit_set)
93        target.EvaluateExpression("(bool)true", NULL, retval_sp);
94    else
95        target.EvaluateExpression("(bool)false", NULL, retval_sp);
96    StreamString name; name.Printf("[%zu]",idx);
97    if (retval_sp)
98        retval_sp->SetName(ConstString(name.GetData()));
99    return retval_sp;
100}
101
102/*((std::vector<std::allocator<bool> >) vBool = {
103 (std::_Bvector_base<std::allocator<bool> >) std::_Bvector_base<std::allocator<bool> > = {
104 (std::_Bvector_base<std::allocator<bool> >::_Bvector_impl) _M_impl = {
105 (std::_Bit_iterator) _M_start = {
106 (std::_Bit_iterator_base) std::_Bit_iterator_base = {
107 (_Bit_type *) _M_p = 0x0016b160
108 (unsigned int) _M_offset = 0
109 }
110 }
111 (std::_Bit_iterator) _M_finish = {
112 (std::_Bit_iterator_base) std::_Bit_iterator_base = {
113 (_Bit_type *) _M_p = 0x0016b16c
114 (unsigned int) _M_offset = 16
115 }
116 }
117 (_Bit_type *) _M_end_of_storage = 0x0016b170
118 }
119 }
120 }
121 */
122
123bool
124lldb_private::formatters::LibstdcppVectorBoolSyntheticFrontEnd::Update()
125{
126    ValueObjectSP valobj_sp = m_backend.GetSP();
127    if (!valobj_sp)
128        return false;
129    if (!valobj_sp)
130        return false;
131    m_exe_ctx_ref = valobj_sp->GetExecutionContextRef();
132
133    ValueObjectSP m_impl_sp(valobj_sp->GetChildMemberWithName(ConstString("_M_impl"), true));
134    if (!m_impl_sp)
135        return false;
136
137    ValueObjectSP m_start_sp(m_impl_sp->GetChildMemberWithName(ConstString("_M_start"), true));
138    ValueObjectSP m_finish_sp(m_impl_sp->GetChildMemberWithName(ConstString("_M_finish"), true));
139
140    ValueObjectSP start_p_sp, finish_p_sp, finish_offset_sp;
141
142    if (!m_start_sp || !m_finish_sp)
143        return false;
144
145    start_p_sp = m_start_sp->GetChildMemberWithName(ConstString("_M_p"), true);
146    finish_p_sp = m_finish_sp->GetChildMemberWithName(ConstString("_M_p"), true);
147    finish_offset_sp = m_finish_sp->GetChildMemberWithName(ConstString("_M_offset"), true);
148
149    if (!start_p_sp || !finish_offset_sp || !finish_p_sp)
150        return false;
151
152    m_base_data_address = start_p_sp->GetValueAsUnsigned(0);
153    if (!m_base_data_address)
154        return false;
155
156    lldb::addr_t end_data_address(finish_p_sp->GetValueAsUnsigned(0));
157    if (!end_data_address)
158        return false;
159
160    if (end_data_address < m_base_data_address)
161        return false;
162    else
163        m_count = finish_offset_sp->GetValueAsUnsigned(0) + (end_data_address-m_base_data_address)*8;
164
165    return true;
166}
167
168bool
169lldb_private::formatters::LibstdcppVectorBoolSyntheticFrontEnd::MightHaveChildren ()
170{
171    return true;
172}
173
174size_t
175lldb_private::formatters::LibstdcppVectorBoolSyntheticFrontEnd::GetIndexOfChildWithName (const ConstString &name)
176{
177    if (!m_count || !m_base_data_address)
178        return UINT32_MAX;
179    const char* item_name = name.GetCString();
180    uint32_t idx = ExtractIndexFromString(item_name);
181    if (idx < UINT32_MAX && idx >= CalculateNumChildren())
182        return UINT32_MAX;
183    return idx;
184}
185
186lldb_private::formatters::LibstdcppVectorBoolSyntheticFrontEnd::~LibstdcppVectorBoolSyntheticFrontEnd ()
187{}
188
189SyntheticChildrenFrontEnd*
190lldb_private::formatters::LibstdcppVectorBoolSyntheticFrontEndCreator (CXXSyntheticChildren*, lldb::ValueObjectSP valobj_sp)
191{
192    if (!valobj_sp)
193        return NULL;
194    return (new LibstdcppVectorBoolSyntheticFrontEnd(valobj_sp));
195}
196
197/*
198 (std::_Rb_tree_iterator<std::pair<const int, std::basic_string<char, std::char_traits<char>, std::allocator<char> > > >) ibeg = {
199 (_Base_ptr) _M_node = 0x0000000100103910 {
200 (std::_Rb_tree_color) _M_color = _S_black
201 (std::_Rb_tree_node_base::_Base_ptr) _M_parent = 0x00000001001038c0
202 (std::_Rb_tree_node_base::_Base_ptr) _M_left = 0x0000000000000000
203 (std::_Rb_tree_node_base::_Base_ptr) _M_right = 0x0000000000000000
204 }
205 }
206 */
207
208lldb_private::formatters::LibstdcppMapIteratorSyntheticFrontEnd::LibstdcppMapIteratorSyntheticFrontEnd (lldb::ValueObjectSP valobj_sp) :
209    SyntheticChildrenFrontEnd(*valobj_sp.get()),
210    m_exe_ctx_ref(),
211    m_pair_address(0),
212    m_pair_type(),
213    m_options(),
214    m_pair_sp()
215{
216    if (valobj_sp)
217        Update();
218    m_options.SetCoerceToId(false);
219    m_options.SetUnwindOnError(true);
220    m_options.SetKeepInMemory(true);
221    m_options.SetUseDynamic(lldb::eDynamicCanRunTarget);
222}
223
224bool
225lldb_private::formatters::LibstdcppMapIteratorSyntheticFrontEnd::Update()
226{
227    ValueObjectSP valobj_sp = m_backend.GetSP();
228    if (!valobj_sp)
229        return false;
230
231    TargetSP target_sp(valobj_sp->GetTargetSP());
232
233    if (!target_sp)
234        return false;
235
236    bool is_64bit = (target_sp->GetArchitecture().GetAddressByteSize() == 8);
237
238    if (!valobj_sp)
239        return false;
240    m_exe_ctx_ref = valobj_sp->GetExecutionContextRef();
241
242    ValueObjectSP _M_node_sp(valobj_sp->GetChildMemberWithName(ConstString("_M_node"), true));
243    if (!_M_node_sp)
244        return false;
245
246    m_pair_address = _M_node_sp->GetValueAsUnsigned(0);
247    if (m_pair_address == 0)
248        return false;
249
250    m_pair_address += (is_64bit ? 32 : 16);
251
252    ClangASTType my_type(valobj_sp->GetClangType());
253    if (my_type.GetNumTemplateArguments() >= 1)
254    {
255        TemplateArgumentKind kind;
256        ClangASTType pair_type = my_type.GetTemplateArgument(0, kind);
257        if (kind != eTemplateArgumentKindType && kind != eTemplateArgumentKindTemplate && kind != eTemplateArgumentKindTemplateExpansion)
258            return false;
259        m_pair_type = pair_type;
260    }
261    else
262        return false;
263
264    return true;
265}
266
267size_t
268lldb_private::formatters::LibstdcppMapIteratorSyntheticFrontEnd::CalculateNumChildren ()
269{
270    return 2;
271}
272
273lldb::ValueObjectSP
274lldb_private::formatters::LibstdcppMapIteratorSyntheticFrontEnd::GetChildAtIndex (size_t idx)
275{
276    if (m_pair_address != 0 && m_pair_type)
277    {
278        if (!m_pair_sp)
279            m_pair_sp = ValueObject::CreateValueObjectFromAddress("pair", m_pair_address, m_exe_ctx_ref, m_pair_type);
280        if (m_pair_sp)
281            return m_pair_sp->GetChildAtIndex(idx, true);
282    }
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