1/***************************************************************************
2 * Copyright (C) 2005-2014 by the Quassel Project *
3 * devel@quassel-irc.org *
4 * *
5 * This program is free software; you can redistribute it and/or modify *
6 * it under the terms of the GNU General Public License as published by *
7 * the Free Software Foundation; either version 2 of the License, or *
8 * (at your option) version 3. *
9 * *
10 * This program is distributed in the hope that it will be useful, *
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of *
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
13 * GNU General Public License for more details. *
14 * *
15 * You should have received a copy of the GNU General Public License *
16 * along with this program; if not, write to the *
17 * Free Software Foundation, Inc., *
18 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. *
19 ***************************************************************************/
20
21#include "quassel.h"
22
23#if defined(HAVE_EXECINFO) && !defined(Q_OS_MAC)
24# define BUILD_CRASHHANDLER
25# include <execinfo.h>
26# include <dlfcn.h>
27# include <cxxabi.h>
28# include <QFile>
29# include <QTextStream>
30# include <QDebug>
31#endif
32
33void Quassel::logBacktrace(const QString &filename)
34{
35#ifndef BUILD_CRASHHANDLER
36 Q_UNUSED(filename)
37#else
38 void *callstack[128];
39 int i, frames = backtrace(callstack, 128);
40
41 QFile dumpFile(filename);
42 dumpFile.open(QIODevice::Append);
43 QTextStream dumpStream(&dumpFile);
44
45 for (i = 0; i < frames; ++i) {
46 Dl_info info;
47 dladdr(callstack[i], &info);
48 // as a reference:
49 // typedef struct
50 // {
51 // __const char *dli_fname; /* File name of defining object. */
52 // void *dli_fbase; /* Load address of that object. */
53 // __const char *dli_sname; /* Name of nearest symbol. */
54 // void *dli_saddr; /* Exact value of nearest symbol. */
55 // } Dl_info;
56
57 #ifdef __LP64__
58 int addrSize = 16;
59 #else
60 int addrSize = 8;
61 #endif
62
63 QString funcName;
64 if (info.dli_sname) {
65 char *func = abi::__cxa_demangle(info.dli_sname, 0, 0, 0);
66 if (func) {
67 funcName = QString(func);
68 free(func);
69 }
70 else {
71 funcName = QString(info.dli_sname);
72 }
73 }
74 else {
75 funcName = QString("0x%1").arg((ulong)(info.dli_saddr), addrSize, 16, QLatin1Char('0'));
76 }
77
78 // prettificating the filename
79 QString fileName("???");
80 if (info.dli_fname) {
81 fileName = QString(info.dli_fname);
82 int slashPos = fileName.lastIndexOf('/');
83 if (slashPos != -1)
84 fileName = fileName.mid(slashPos + 1);
85 }
86
87 QString debugLine = QString("#%1 %2 0x%3 %4").arg(i, 3, 10)
88 .arg(fileName, -20)
89 .arg((ulong)(callstack[i]), addrSize, 16, QLatin1Char('0'))
90 .arg(funcName);
91
92 dumpStream << debugLine << "\n";
93 qDebug() << qPrintable(debugLine);
94 }
95 dumpFile.close();
96#endif /* BUILD_CRASHHANDLER */
97}
98