mirror of
https://github.com/qgis/QGIS.git
synced 2025-06-20 00:03:07 -04:00
debugging improvements
This commit is contained in:
Juergen E. Fischer
parent
51dbbe1357
commit
e4fed7418d
189
src/app/main.cpp
189
src/app/main.cpp
@ -41,6 +41,7 @@
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#include <cstdio>
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#include <stdio.h>
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#include <stdlib.h>
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#include <stdarg.h>
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#ifdef WIN32
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// Open files in binary mode
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@ -83,6 +84,8 @@ typedef SInt32 SRefCon;
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#include <unistd.h>
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#include <execinfo.h>
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#include <signal.h>
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#include <sys/wait.h>
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#include <errno.h>
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#endif
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/** print usage text
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@ -193,12 +196,113 @@ void qgisCrash( int signal )
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{
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qFatal( "QGIS died on signal %d", signal );
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}
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#endif
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void dumpBacktrace()
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void myPrint( const char *fmt, ... )
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{
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if ( access( "/usr/bin/c++filt", X_OK ) )
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va_list ap;
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va_start( ap, fmt );
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#if defined(Q_OS_WIN)
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char buffer[1024];
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vsnprintf( buffer, sizeof buffer, fmt, ap );
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OutputDebugString( buffer );
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#else
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vfprintf( stderr, fmt, ap );
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#endif
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}
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void dumpBacktrace( unsigned int depth = 0 )
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{
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if ( depth == 0 )
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depth = 10;
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#if (defined(linux) && !defined(ANDROID)) || defined(__FreeBSD__)
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#if defined(linux) && !defined(ANDROID)
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if ( QgsLogger::debugLevel() >= 4 )
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{
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( void ) write( STDERR_FILENO, "Stacktrace (c++filt NOT FOUND):\n", 32 );
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static int gdbRunning = -1;
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static int gdbpipe[2];
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static int gdbpid;
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if ( gdbRunning == -1 )
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{
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gdbRunning = 0;
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myPrint( "starting gdb\n" );
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if ( access( "/usr/bin/gdb", X_OK ) == 0 )
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{
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// take full stacktrace using gdb
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// http://stackoverflow.com/questions/3151779/how-its-better-to-invoke-gdb-from-program-to-print-its-stacktrace
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char exename[512];
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int len = readlink( "/proc/self/exe", exename, sizeof( exename ) - 1 );
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if ( len < 0 )
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{
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myPrint( "Could not read link.\n" );
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}
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else
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{
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exename[ len ] = 0;
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if ( pipe( gdbpipe ) == 0 )
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{
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char pidstr[32];
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snprintf( pidstr, sizeof pidstr, "--pid=%d", getpid() );
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gdbpid = fork();
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fprintf( stderr, "fork returned: %d\n", gdbpid );
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if ( gdbpid == 0 )
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{
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close( STDIN_FILENO ); // close stdin
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dup( gdbpipe[0] ); // stdin from pipe
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close( gdbpipe[1] ); // close writing end
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// attach, backtrace and continue
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char btcmd[32];
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snprintf( btcmd, sizeof btcmd, "bt full %u", depth );
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execl( "/usr/bin/gdb", "gdb", "-q", "-ex", "set height 0", "-n", pidstr, "-ex", "thread", "-ex", btcmd, "-ex", "cont", exename, NULL );
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perror( "could not start gdb" );
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exit( 0 );
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}
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else if ( gdbpid >= 0 )
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{
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close( gdbpipe[0] ); // close reading end
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gdbRunning = 1;
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}
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else
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{
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myPrint( "Could not start gdb (%d:%s).\n", errno, strerror( errno ) );
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}
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}
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else
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{
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myPrint( "Could not create pipe (%d:%s).\n", errno, strerror( errno ) );
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}
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}
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}
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else
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{
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myPrint( "gdb not available.\n" );
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}
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}
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else if ( gdbRunning == 1 )
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{
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myPrint( "Stacktrace (using gdb):\n" );
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char btcmd[20];
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snprintf( btcmd, sizeof btcmd, "bt full %u\ncont\n", depth );
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if ( write( gdbpipe[1], btcmd, strlen( btcmd ) ) == ( int ) strlen( btcmd ) && kill( gdbpid, SIGINT ) == 0 )
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return;
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myPrint( "write error to gdb [%d:%s]\n", errno, strerror( errno ) );
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gdbRunning = 0;
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}
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}
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#endif
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if ( access( "/usr/bin/c++filt", X_OK ) < 0 )
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{
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myPrint( "Stacktrace (c++filt NOT FOUND):\n" );
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}
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else
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{
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@ -206,25 +310,45 @@ void dumpBacktrace()
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if ( pipe( fd ) == 0 && fork() == 0 )
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{
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close( STDIN_FILENO );
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close( fd[1] );
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dup( fd[0] );
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close( STDIN_FILENO ); // close stdin
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dup( fd[0] ); // stdin from pipe
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close( fd[1] ); // close writing end
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execl( "/usr/bin/c++filt", "c++filt", ( char * ) 0 );
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perror( "could not start c++filt" );
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exit( 1 );
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}
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( void ) write( STDERR_FILENO, "Stacktrace (piped through c++filt):\n", 36 );
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close( STDERR_FILENO );
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close( fd[0] );
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dup( fd[1] );
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myPrint( "Stacktrace (piped through c++filt):\n" );
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close( fd[0] ); // close reading end
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close( STDERR_FILENO ); // close stderr
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dup( fd[1] ); // stderr to pipe
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}
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void *buffer[256];
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int nptrs = backtrace( buffer, sizeof( buffer ) / sizeof( *buffer ) );
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void **buffer = new void *[ depth ];
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int nptrs = backtrace( buffer, depth );
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backtrace_symbols_fd( buffer, nptrs, STDERR_FILENO );
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}
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delete [] buffer;
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#elif defined(Q_OS_WIN)
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void **buffer = new void *[ depth ];
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SymSetOptions( SYMOPT_DEFERRED_LOADS | SYMOPT_INCLUDE_32BIT_MODULES | SYMOPT_UNDNAME );
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SymInitialize( GetCurrentProcess(), "http://msdl.microsoft.com/download/symbols", TRUE );
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unsigned short nFrames = CaptureStackBackTrace( 1, depth, buffer, NULL );
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SYMBOL_INFO *symbol = ( SYMBOL_INFO * ) qgsMalloc( sizeof( SYMBOL_INFO ) + 256 );
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symbol->MaxNameLen = 255;
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symbol->SizeOfStruct = sizeof( SYMBOL_INFO );
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for ( int i = 0; i < nFrames; i++ )
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{
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SymFromAddr( GetCurrentProcess(), ( DWORD64 )( buffer[ i ] ), 0, symbol );
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symbol->Name[ 255 ] = 0;
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myPrint( "%d: %s [%x]\n", i, symbol->Name, symbol->Address );
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}
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qgsFree( symbol );
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#endif
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}
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/*
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* Hook into the qWarning/qFatal mechanism so that we can channel messages
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@ -242,31 +366,19 @@ void myMessageOutput( QtMsgType type, const char *msg )
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switch ( type )
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{
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case QtDebugMsg:
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fprintf( stderr, "Debug: %s\n", msg );
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#if (defined(linux) && !defined(ANDROID)) || defined(__FreeBSD__)
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myPrint( "%s\n", msg );
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if ( strncmp( msg, "Backtrace", 9 ) == 0 )
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dumpBacktrace();
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#endif
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dumpBacktrace( atoi( msg + 9 ) );
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break;
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case QtCriticalMsg:
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fprintf( stderr, "Critical: %s\n", msg );
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myPrint( "Critical: %s\n", msg );
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break;
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case QtWarningMsg:
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fprintf( stderr, "Warning: %s\n", msg );
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myPrint( "Warning: %s\n", msg );
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#ifdef QGISDEBUG
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if ( 0 == strncmp( msg, "Object::", 8 )
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|| 0 == strncmp( msg, "QWidget::", 9 )
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|| 0 == strncmp( msg, "QPainter::", 10 )
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)
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{
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#if 0
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#if (defined(linux) && !defined(ANDROID)) || defined(__FreeBSD__)
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dumpBacktrace();
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#endif
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#endif
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QgsMessageLog::logMessage( msg, "Qt" );
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}
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dumpBacktrace( 20 );
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QgsMessageLog::logMessage( msg, "Qt" );
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#endif
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// TODO: Verify this code in action.
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@ -279,11 +391,9 @@ void myMessageOutput( QtMsgType type, const char *msg )
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break;
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case QtFatalMsg:
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{
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fprintf( stderr, "Fatal: %s\n", msg );
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#if (defined(linux) && !defined(ANDROID)) || defined(__FreeBSD__)
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dumpBacktrace();
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#endif
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abort(); // deliberately core dump
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myPrint( "Fatal: %s\n", msg );
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dumpBacktrace( 256 );
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abort(); // deliberately dump core
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}
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}
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}
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@ -299,10 +409,10 @@ int main( int argc, char *argv[] )
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#endif // _MSC_VER
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#endif // WIN32
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#if (defined(linux) && !defined(ANDROID)) || defined(__FreeBSD__)
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// Set up the custom qWarning/qDebug custom handler
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qInstallMsgHandler( myMessageOutput );
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#if (defined(linux) && !defined(ANDROID)) || defined(__FreeBSD__)
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signal( SIGQUIT, qgisCrash );
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signal( SIGILL, qgisCrash );
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signal( SIGFPE, qgisCrash );
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@ -775,9 +885,6 @@ int main( int argc, char *argv[] )
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}
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}
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#ifdef QGISDEBUG
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// QgsDebugMsg(QString("Setting translation to %1/qgis_%2").arg(i18nPath).arg(myTranslationCode));
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#endif
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QTranslator qgistor( 0 );
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if ( qgistor.load( QString( "qgis_" ) + myTranslationCode, i18nPath ) )
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{
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