1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
|
// Copyright (c) 2009, Google Inc.
// All rights reserved.
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are
// met:
//
// * Redistributions of source code must retain the above copyright
// notice, this list of conditions and the following disclaimer.
// * Redistributions in binary form must reproduce the above
// copyright notice, this list of conditions and the following disclaimer
// in the documentation and/or other materials provided with the
// distribution.
// * Neither the name of Google Inc. nor the names of its
// contributors may be used to endorse or promote products derived from
// this software without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
// dump_stabs.cc --- implement the DumpStabsHandler class.
#include <cstdarg>
#include <cxxabi.h>
#include <algorithm>
#include <cassert>
#include "common/linux/dump_stabs.h"
namespace google_breakpad {
using std::string;
// Demangle using abi call.
// Older GCC may not support it.
static string Demangle(const string &mangled) {
int status = 0;
char *demangled = abi::__cxa_demangle(mangled.c_str(), NULL, NULL, &status);
if (status == 0 && demangled != NULL) {
string str(demangled);
free(demangled);
return str;
}
return string(mangled);
}
bool DumpStabsHandler::StartCompilationUnit(const char *name, uint64_t address,
const char *build_directory) {
assert(!comp_unit_base_address_);
current_source_file_name_ = name;
current_source_file_ = module_->FindFile(name);
comp_unit_base_address_ = address;
boundaries_.push_back(static_cast<Module::Address>(address));
return true;
}
bool DumpStabsHandler::EndCompilationUnit(uint64_t address) {
assert(comp_unit_base_address_);
comp_unit_base_address_ = 0;
current_source_file_ = NULL;
current_source_file_name_ = NULL;
if (address)
boundaries_.push_back(static_cast<Module::Address>(address));
return true;
}
bool DumpStabsHandler::StartFunction(const string &name,
uint64_t address) {
assert(!current_function_);
Module::Function *f = new Module::Function;
f->name_ = Demangle(name);
f->address_ = address;
f->size_ = 0; // We compute this in DumpStabsHandler::Finalize().
f->parameter_size_ = 0; // We don't provide this information.
current_function_ = f;
boundaries_.push_back(static_cast<Module::Address>(address));
return true;
}
bool DumpStabsHandler::EndFunction(uint64_t address) {
assert(current_function_);
// Functions in this compilation unit should have address bigger
// than the compilation unit's starting address. There may be a lot
// of duplicated entries for functions in the STABS data; only one
// entry can meet this requirement.
//
// (I don't really understand the above comment; just bringing it
// along from the previous code, and leaving the behaivor unchanged.
// If you know the whole story, please patch this comment. --jimb)
if (current_function_->address_ >= comp_unit_base_address_)
functions_.push_back(current_function_);
else
delete current_function_;
current_function_ = NULL;
if (address)
boundaries_.push_back(static_cast<Module::Address>(address));
return true;
}
bool DumpStabsHandler::Line(uint64_t address, const char *name, int number) {
assert(current_function_);
assert(current_source_file_);
if (name != current_source_file_name_) {
current_source_file_ = module_->FindFile(name);
current_source_file_name_ = name;
}
Module::Line line;
line.address_ = address;
line.size_ = 0; // We compute this in DumpStabsHandler::Finalize().
line.file_ = current_source_file_;
line.number_ = number;
current_function_->lines_.push_back(line);
return true;
}
void DumpStabsHandler::Warning(const char *format, ...) {
va_list args;
va_start(args, format);
vfprintf(stderr, format, args);
va_end(args);
}
void DumpStabsHandler::Finalize() {
// Sort our boundary list, so we can search it quickly.
sort(boundaries_.begin(), boundaries_.end());
// Sort all functions by address, just for neatness.
sort(functions_.begin(), functions_.end(),
Module::Function::CompareByAddress);
for (vector<Module::Function *>::iterator func_it = functions_.begin();
func_it != functions_.end();
func_it++) {
Module::Function *f = *func_it;
// Compute the function f's size.
vector<Module::Address>::iterator boundary
= std::upper_bound(boundaries_.begin(), boundaries_.end(), f->address_);
if (boundary != boundaries_.end())
f->size_ = *boundary - f->address_;
else
// If this is the last function in the module, and the STABS
// reader was unable to give us its ending address, then assign
// it a bogus, very large value. This will happen at most once
// per module: since we've added all functions' addresses to the
// boundary table, only one can be the last.
f->size_ = kFallbackSize;
// Compute sizes for each of the function f's lines --- if it has any.
if (!f->lines_.empty()) {
stable_sort(f->lines_.begin(), f->lines_.end(),
Module::Line::CompareByAddress);
vector<Module::Line>::iterator last_line = f->lines_.end() - 1;
for (vector<Module::Line>::iterator line_it = f->lines_.begin();
line_it != last_line; line_it++)
line_it[0].size_ = line_it[1].address_ - line_it[0].address_;
// Compute the size of the last line from f's end address.
last_line->size_ = (f->address_ + f->size_) - last_line->address_;
}
}
// Now that everything has a size, add our functions to the module, and
// dispose of our private list.
module_->AddFunctions(functions_.begin(), functions_.end());
functions_.clear();
}
} // namespace google_breakpad
|
