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
|
/**
* @file llstacktrace.cpp
* @brief stack tracing functionality
*
* $LicenseInfo:firstyear=2001&license=viewerlgpl$
* Second Life Viewer Source Code
* Copyright (C) 2010, Linden Research, Inc.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation;
* version 2.1 of the License only.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*
* Linden Research, Inc., 945 Battery Street, San Francisco, CA 94111 USA
* $/LicenseInfo$
*/
#include "linden_common.h"
#include "llstacktrace.h"
#ifdef LL_WINDOWS
#include <iostream>
#include <sstream>
#include "llwin32headerslean.h"
#include <dbghelp.h>
typedef USHORT NTAPI RtlCaptureStackBackTrace_Function(
IN ULONG frames_to_skip,
IN ULONG frames_to_capture,
OUT PVOID *backtrace,
OUT PULONG backtrace_hash);
static RtlCaptureStackBackTrace_Function* const RtlCaptureStackBackTrace_fn =
(RtlCaptureStackBackTrace_Function*)
GetProcAddress(GetModuleHandleA("ntdll.dll"), "RtlCaptureStackBackTrace");
bool ll_get_stack_trace(std::vector<std::string>& lines)
{
const S32 MAX_STACK_DEPTH = 32;
const S32 STRING_NAME_LENGTH = 200;
const S32 FRAME_SKIP = 2;
static bool symbolsLoaded = false;
static bool firstCall = true;
HANDLE hProc = GetCurrentProcess();
// load the symbols if they're not loaded
if(!symbolsLoaded && firstCall)
{
symbolsLoaded = SymInitialize(hProc, NULL, true);
firstCall = false;
}
// if loaded, get the call stack
if(symbolsLoaded)
{
// create the frames to hold the addresses
void* frames[MAX_STACK_DEPTH];
memset(frames, 0, sizeof(void*)*MAX_STACK_DEPTH);
S32 depth = 0;
// get the addresses
depth = RtlCaptureStackBackTrace_fn(FRAME_SKIP, MAX_STACK_DEPTH, frames, NULL);
IMAGEHLP_LINE64 line;
memset(&line, 0, sizeof(IMAGEHLP_LINE64));
line.SizeOfStruct = sizeof(IMAGEHLP_LINE64);
// create something to hold address info
PIMAGEHLP_SYMBOL64 pSym;
pSym = (PIMAGEHLP_SYMBOL64)malloc(sizeof(IMAGEHLP_SYMBOL64) + STRING_NAME_LENGTH);
memset(pSym, 0, sizeof(IMAGEHLP_SYMBOL64) + STRING_NAME_LENGTH);
pSym->MaxNameLength = STRING_NAME_LENGTH;
pSym->SizeOfStruct = sizeof(IMAGEHLP_SYMBOL64);
// get address info for each address frame
// and store
for(S32 i=0; i < depth; i++)
{
std::stringstream stack_line;
bool ret;
DWORD64 addr = (DWORD64)frames[i];
ret = SymGetSymFromAddr64(hProc, addr, 0, pSym);
if(ret)
{
stack_line << pSym->Name << " ";
}
DWORD dummy;
ret = SymGetLineFromAddr64(hProc, addr, &dummy, &line);
if(ret)
{
std::string file_name = line.FileName;
std::string::size_type index = file_name.rfind("\\");
stack_line << file_name.substr(index + 1, file_name.size()) << ":" << line.LineNumber;
}
lines.push_back(stack_line.str());
}
free(pSym);
// TODO: figure out a way to cleanup symbol loading
// Not hugely necessary, however.
//SymCleanup(hProc);
return true;
}
else
{
lines.push_back("Stack Trace Failed. PDB symbol info not loaded");
}
return false;
}
void ll_get_stack_trace_internal(std::vector<std::string>& lines)
{
const S32 MAX_STACK_DEPTH = 100;
const S32 STRING_NAME_LENGTH = 256;
HANDLE process = GetCurrentProcess();
SymInitialize( process, NULL, true );
void *stack[MAX_STACK_DEPTH];
unsigned short frames = RtlCaptureStackBackTrace_fn( 0, MAX_STACK_DEPTH, stack, NULL );
SYMBOL_INFO *symbol = (SYMBOL_INFO*)calloc(sizeof(SYMBOL_INFO) + STRING_NAME_LENGTH * sizeof(char), 1);
symbol->MaxNameLen = STRING_NAME_LENGTH-1;
symbol->SizeOfStruct = sizeof(SYMBOL_INFO);
for(unsigned int i = 0; i < frames; i++)
{
SymFromAddr(process, (DWORD64)(stack[i]), 0, symbol);
lines.push_back(symbol->Name);
}
free( symbol );
}
#else
bool ll_get_stack_trace(std::vector<std::string>& lines)
{
return false;
}
void ll_get_stack_trace_internal(std::vector<std::string>& lines)
{
}
#endif
|
