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Diffstat (limited to 'src/crashhandler.cpp')
| -rw-r--r-- | src/crashhandler.cpp | 226 |
1 files changed, 226 insertions, 0 deletions
diff --git a/src/crashhandler.cpp b/src/crashhandler.cpp new file mode 100644 index 0000000..64e745b --- /dev/null +++ b/src/crashhandler.cpp @@ -0,0 +1,226 @@ +// Code from Amarok. + +/*************************************************************************** + * Copyright (C) 2005 Max Howell <max.howell@methylblue.com> * + * * + * This program is free software; you can redistribute it and/or modify * + * it under the terms of the GNU General Public License as published by * + * the Free Software Foundation; either version 2 of the License, or * + * (at your option) any later version. * + * * + ***************************************************************************/ + +//#include "amarok.h" +//#include "amarokconfig.h" +#include "crashhandler.h" +//#include "debug.h" +#include "config.h" + +#include <kapplication.h> //invokeMailer() +#include <kaboutdata.h> +#include <kdeversion.h> +#include <klocale.h> +#include <ktempfile.h> + +#include <qfile.h> +#include <qregexp.h> +#include <qtextstream.h> + +#include <cstdio> //popen, fread +#include <iostream> +#include <sys/types.h> //pid_t +#include <sys/wait.h> //waitpid +//#include <taglib/taglib.h> +#include <unistd.h> //write, getpid + + + +//#ifndef TAGLIB_PATCH_VERSION +//// seems to be wheel's style +//#define TAGLIB_PATCH_VERSION 0 +//#endif + + + #if 0 + class CrashHandlerWidget : public KDialog { + public: + CrashHandlerWidget(); + }; + #endif + + static QString + runCommand( const QCString &command ) + { + static const uint SIZE = 40960; //40 KiB + static char stdoutBuf[ SIZE ]; + +// debug() << "Running: " << command << endl; + + FILE *process = ::popen( command, "r" ); + stdoutBuf[ std::fread( static_cast<void*>( stdoutBuf ), sizeof(char), SIZE-1, process ) ] = '\0'; + ::pclose( process ); + + return QString::fromLocal8Bit( stdoutBuf ); + } + + void + Crash::crashHandler( int /*signal*/ ) + { + // we need to fork to be able to get a + // semi-decent bt - I dunno why + const pid_t pid = ::fork(); + + if( pid <= 0 ) + { + // we are the child process (the result of the fork) +// debug() << "amaroK is crashing...\n"; + + QString subject = "[basket-crash] " VERSION " "; + QString body = i18n( + "%1 has crashed! We're sorry about this.\n" + "\n" + "But, all is not lost! You could potentially help us fix the crash. " + "Information describing the crash is below, so just click send, " + "or if you have time, write a brief description of how the crash happened first.\n\n" + "Many thanks." ).arg(kapp->aboutData()->programName()) + "\n\n"; + body += "\n\n\n\n\n\n" + i18n( + "The information below is to help the developers identify the problem, " + "please do not modify it." ) + "\n\n\n\n"; + + + body += "======== DEBUG INFORMATION =======\n" + "Version: " VERSION "\n" + "Build date: " __DATE__ "\n" + "CC version: " __VERSION__ "\n" //assuming we're using GCC + "KDElibs: " KDE_VERSION_STRING "\n" +;// "TagLib: %2.%3.%4\n"; + +/* body = body + .arg( TAGLIB_MAJOR_VERSION ) + .arg( TAGLIB_MINOR_VERSION ) + .arg( TAGLIB_PATCH_VERSION );*/ + + #ifdef NDEBUG + body += "NDEBUG: true"; + #endif + body += "\n"; + + /// obtain the backtrace with gdb + + KTempFile temp; + temp.setAutoDelete( true ); + + const int handle = temp.handle(); + +// QCString gdb_command_string = +// "file amarokapp\n" +// "attach " + QCString().setNum( ::getppid() ) + "\n" +// "bt\n" "echo \\n\n" +// "thread apply all bt\n"; + + const QCString gdb_batch = + "bt\n" + "echo \\n\\n\n" + "bt full\n" + "echo \\n\\n\n" + "echo ==== (gdb) thread apply all bt ====\\n\n" + "thread apply all bt\n"; + + ::write( handle, gdb_batch, gdb_batch.length() ); + ::fsync( handle ); + + // so we can read stderr too + ::dup2( fileno( stdout ), fileno( stderr ) ); + + + QCString gdb; + gdb = "gdb --nw -n --batch -x "; + gdb += temp.name().latin1(); + gdb += " basket "; + gdb += QCString().setNum( ::getppid() ); + + QString bt = runCommand( gdb ); + + /// clean up + bt.remove( "(no debugging symbols found)..." ); + bt.remove( "(no debugging symbols found)\n" ); + bt.replace( QRegExp("\n{2,}"), "\n" ); //clean up multiple \n characters + bt.stripWhiteSpace(); + + /// analyze usefulness + bool useful = true; + const QString fileCommandOutput = runCommand( "file `which basket`" ); + + if( fileCommandOutput.find( "not stripped", false ) == -1 ) + subject += "[___stripped]"; //same length as below + else + subject += "[NOTstripped]"; + + if( !bt.isEmpty() ) { + const int invalidFrames = bt.contains( QRegExp("\n#[0-9]+\\s+0x[0-9A-Fa-f]+ in \\?\\?") ); + const int validFrames = bt.contains( QRegExp("\n#[0-9]+\\s+0x[0-9A-Fa-f]+ in [^?]") ); + const int totalFrames = invalidFrames + validFrames; + + if( totalFrames > 0 ) { + const double validity = double(validFrames) / totalFrames; + subject += QString("[validity: %1]").arg( validity, 0, 'f', 2 ); + if( validity <= 0.5 ) useful = false; + } + subject += QString("[frames: %1]").arg( totalFrames, 3 /*padding*/ ); + + if( bt.find( QRegExp(" at \\w*\\.cpp:\\d+\n") ) >= 0 ) + subject += "[line numbers]"; + } + else + useful = false; + +// subject += QString("[%1]").arg( AmarokConfig::soundSystem().remove( QRegExp("-?engine") ) ); + +// debug() << subject << endl; + + + //TODO -fomit-frame-pointer buggers up the backtrace, so detect it + //TODO -O optimization can rearrange execution and stuff so show a warning for the developer + //TODO pass the CXXFLAGS used with the email + + if( useful ) { + body += "==== file `which basket` ==========\n"; + body += fileCommandOutput + "\n"; + body += "==== (gdb) bt =====================\n"; + body += bt;//+ "\n\n"; +// body += "==== kdBacktrace() ================\n"; +// body += kdBacktrace(); + + //TODO startup notification + kapp->invokeMailer( + /*to*/ "kelvie@ieee.org", + /*cc*/ QString(), + /*bcc*/ QString(), + /*subject*/ subject, + /*body*/ body, + /*messageFile*/ QString(), + /*attachURLs*/ QStringList(), + /*startup_id*/ "" ); + } + else { + std::cout << "\n" + i18n( "%1 has crashed! We're sorry about this.\n\n" + "But, all is not lost! Perhaps an upgrade is already available " + "which fixes the problem. Please check your distribution's software repository." ) + .arg(kapp->aboutData()->programName()).local8Bit() << std::endl; + } + + //_exit() exits immediately, otherwise this + //function is called repeatedly ad finitum + ::_exit( 255 ); + } + + else { + // we are the process that crashed + + ::alarm( 0 ); + + // wait for child to exit + ::waitpid( pid, NULL, 0 ); + ::_exit( 253 ); + } + } |