/*************************************************************************** *   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 <kapplication.h> //invokeMailer()#include <kdebug.h>       //kdBacktrace()#include <kdeversion.h>#include <klocale.h>#include <ktempfile.h>#include <qfile.h>#include <qregexp.h>#include <qtextstream.h>#include <qglobal.h> //qVersion()#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#endifnamespace Amarok{    #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 ] = {0};        std::cout << "Running: " << command << std::endl;        FILE *process = ::popen( command, "r" );        if ( process )        {            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 )        {            std::cout << "forking crash reporter failed\n";            // continuing now can't do no good            _exit( 1 );        }        else if ( pid == 0 )        {            // we are the child process (the result of the fork)            std::cout << "Amarok is crashing...\n";            QString subject = APP_VERSION " ";            QString body = i18n(                    "Amarok has crashed! We are terribly 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.\n\n" );            body += i18n( "\n\n\n\n\n\n"                    "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:    " APP_VERSION "\n"                    "Engine:     %1\n"                    "Build date: " __DATE__ "\n"                    "CC version: " __VERSION__ "\n" //assuming we're using GCC                    "KDElibs:    " KDE_VERSION_STRING "\n"                    "Qt:         %2\n"                    "TagLib:     %3.%4.%5\n"                    "CPU count:  %6\n";            QString cpucount = "unknown";#ifdef __linux__            QString line;            uint cpuCount = 0;            QFile cpuinfo( "/proc/cpuinfo" );            if ( cpuinfo.open( IO_ReadOnly ) ) {                while ( cpuinfo.readLine( line, 20000 ) != -1 ) {                    if ( line.startsWith( "processor" ) ) {                        ++cpuCount;                    }                }            }            cpucount = QString::number( cpuCount );#endif            body = body.arg( AmarokConfig::soundSystem() )                    .arg( qVersion() )                    .arg( TAGLIB_MAJOR_VERSION )                    .arg( TAGLIB_MINOR_VERSION )                    .arg( TAGLIB_PATCH_VERSION )                    .arg( cpucount );            #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 += " amarokapp ";            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 amarokapp`" );            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") ) );            std::cout << subject.latin1() << std::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 amarokapp` =======\n";                body += fileCommandOutput + "\n\n";                body += "==== (gdb) bt =====================\n";                body += bt + "\n\n";                body += "==== kdBacktrace() ================\n";                body += kdBacktrace();                //TODO startup notification                kapp->invokeMailer(                        /*to*/          "amarok-backtraces@lists.sf.net",                        /*cc*/          QString(),                        /*bcc*/         QString(),                        /*subject*/     subject,                        /*body*/        body,                        /*messageFile*/ QString(),                        /*attachURLs*/  QStringList(),                        /*startup_id*/  "" );            }            else {                std::cout << i18n( "\nAmarok has crashed! We are terribly 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.\n" ).local8Bit();            }            //_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 );        }    }}#if 0#include <qlabel.h>#include <qlayout.h>#include <qvbox.h>#include <kdialog.h>#include <kpushbutton.h>#include <kstdguiitem.h>#include <kstandarddirs.h>Amarok::CrashHandlerWidget::CrashHandlerWidget(){    QBoxLayout *layout = new QHBoxLayout( this, 18, 12 );    {        QBoxLayout *lay = new QVBoxLayout( layout );        QLabel *label = new QLabel( this );        label->setPixmap( locate( "data", "drkonqi/pics/konqi.png" ) );        label->setFrameStyle( QFrame::Plain | QFrame::Box );        lay->add( label );        lay->addItem( new QSpacerItem( 3, 3, QSizePolicy::Minimum, QSizePolicy::Expanding ) );    }    layout = new QVBoxLayout( layout, 6 );    layout->add( new QLabel( /*i18n*/(            "<p>" "Amarok has crashed! We are terribly sorry about this :("            "<p>" "However you now have an opportunity to help us fix this crash so that it doesn't "                  "happen again! Click <b>Send Email</b> and Amarok will prepare an email that you "                  "can send to us that contains information about the crash, and we'll try to fix it "                  "as soon as possible."            "<p>" "Thanks for choosing Amarok.<br>" ), this ) );    layout = new QHBoxLayout( layout, 6 );    layout->addItem( new QSpacerItem( 6, 6, QSizePolicy::Expanding ) );    layout->add( new KPushButton( KGuiItem( i18n("Send Email"), "mail_send" ), this, "email" ) );    layout->add( new KPushButton( KStdGuiItem::close(), this, "close" ) );    static_cast<QPushButton*>(child("email"))->setDefault( true );    connect( child( "email" ), SIGNAL(clicked()), SLOT(accept()) );    connect( child( "close" ), SIGNAL(clicked()), SLOT(reject()) );    setCaption( i18n("Crash Handler") );    setFixedSize( sizeHint() );}#endif