326 lines
8.3 KiB
C++
326 lines
8.3 KiB
C++
#define __USE_GNU
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#include "global.h"
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#include <cstdio>
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#include <cstring>
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#include <cerrno>
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#include <sys/types.h>
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#include <sys/wait.h>
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#include <sys/select.h>
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#include "Backtrace.h"
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#include "BacktraceNames.h"
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#include "RageUtil.h"
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#include "CrashHandler.h"
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#include "CrashHandlerInternal.h"
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#include "RageLog.h" /* for RageLog::GetAdditionalLog, etc. only */
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#include "ProductInfo.h"
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#include "arch/ArchHooks/ArchHooks.h"
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#if defined(MACOSX)
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#include "archutils/Darwin/Crash.h"
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#endif
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#include "ver.h"
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bool child_read( int fd, void *p, int size );
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const char *g_pCrashHandlerArgv0 = NULL;
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static void output_stack_trace( FILE *out, const void **BacktracePointers )
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{
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if( BacktracePointers[0] == BACKTRACE_METHOD_NOT_AVAILABLE )
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{
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fprintf( out, "No backtrace method available.\n");
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return;
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}
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if( !BacktracePointers[0] )
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{
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fprintf( out, "Backtrace was empty.\n");
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return;
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}
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for( int i = 0; BacktracePointers[i]; ++i)
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{
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BacktraceNames bn;
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bn.FromAddr( BacktracePointers[i] );
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bn.Demangle();
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/* Don't show the main module name. */
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if( bn.File == g_pCrashHandlerArgv0 && !bn.Symbol.empty() )
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bn.File = "";
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if( bn.Symbol == "__libc_start_main" )
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break;
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fprintf( out, "%s\n", bn.Format().c_str() );
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}
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}
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bool child_read( int fd, void *p, int size )
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{
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char *buf = (char *) p;
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int got = 0;
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while( got < size )
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{
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int ret = read( fd, buf+got, size-got );
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if( ret == -1 )
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{
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if( errno == EINTR )
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continue;
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fprintf( stderr, "Crash handler: error communicating with parent: %s\n", strerror(errno) );
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return false;
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}
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if( ret == 0 )
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{
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fprintf( stderr, "Crash handler: EOF communicating with parent.\n" );
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return false;
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}
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got += ret;
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}
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return true;
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}
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/* Once we get here, we should be * safe to do whatever we want;
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* heavyweights like malloc and RString are OK. (Don't crash!) */
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static void child_process()
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{
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/* 1. Read the CrashData. */
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CrashData crash;
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if( !child_read(3, &crash, sizeof(CrashData)) )
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return;
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/* 2. Read info. */
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int size;
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if( !child_read(3, &size, sizeof(size)) )
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return;
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char *Info = new char [size];
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if( !child_read(3, Info, size) )
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return;
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/* 3. Read AdditionalLog. */
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if( !child_read(3, &size, sizeof(size)) )
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return;
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char *AdditionalLog = new char [size];
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if( !child_read(3, AdditionalLog, size) )
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return;
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/* 4. Read RecentLogs. */
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int cnt = 0;
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if( !child_read(3, &cnt, sizeof(cnt)) )
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return;
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char *Recent[1024];
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for( int i = 0; i < cnt; ++i )
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{
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if( !child_read(3, &size, sizeof(size)) )
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return;
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Recent[i] = new char [size];
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if( !child_read(3, Recent[i], size) )
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return;
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}
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/* 5. Read CHECKPOINTs. */
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if( !child_read(3, &size, sizeof(size)) )
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return;
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char *temp = new char [size];
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if( !child_read(3, temp, size) )
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return;
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vector<RString> Checkpoints;
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split(temp, "$$", Checkpoints);
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delete [] temp;
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/* 6. Read the crashed thread's name. */
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if( !child_read(3, &size, sizeof(size)) )
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return;
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temp = new char [size];
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if( !child_read(3, temp, size) )
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return;
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const RString CrashedThread(temp);
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delete[] temp;
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/* Wait for the child to either finish cleaning up or die. */
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fd_set rs;
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struct timeval timeout = { 5, 0 }; // 5 seconds
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FD_ZERO( &rs );
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FD_SET( 3, &rs );
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int ret = select( 4, &rs, NULL, NULL, &timeout );
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if( ret == 0 )
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{
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fputs( "Timeout exceeded.\n", stderr );
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}
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else if( (ret == -1 && errno != EPIPE) || ret != 1 )
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{
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fprintf( stderr, "Unexpected return from select() result: %d (%s)\n", ret, strerror(errno) );
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// Keep going.
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}
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else
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{
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char x;
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// No need to check FD_ISSET( 3, &rs ) because it was the only descriptor in the set.
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ret = read( 3, &x, sizeof(x) );
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if( ret > 0 )
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{
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fprintf( stderr, "Unexpected child read() result: %i\n", ret );
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/* keep going */
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}
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else if( (ret == -1 && errno != EPIPE) || ret != 0 )
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{
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/* We expect an EOF or EPIPE. What happened? */
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fprintf( stderr, "Unexpected child read() result: %i (%s)\n", ret, strerror(errno) );
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/* keep going */
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}
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}
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RString sCrashInfoPath = "/tmp";
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#if defined(MACOSX)
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sCrashInfoPath = CrashHandler::GetLogsDirectory();
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#else
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const char *home = getenv( "HOME" );
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if( home )
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sCrashInfoPath = home;
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#endif
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sCrashInfoPath += "/crashinfo.txt";
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FILE *CrashDump = fopen( sCrashInfoPath, "w+" );
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if(CrashDump == NULL)
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{
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fprintf( stderr, "Couldn't open " + sCrashInfoPath + ": %s\n", strerror(errno) );
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exit(1);
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}
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fprintf( CrashDump, "%s%s crash report", PRODUCT_FAMILY, product_version );
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#if defined(HAVE_VERSION_INFO)
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fprintf( CrashDump, " (build %lu, %s @ %s)", version_num, version_date, version_time );
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#endif
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fprintf( CrashDump, "\n" );
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fprintf( CrashDump, "--------------------------------------\n" );
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fprintf( CrashDump, "\n" );
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RString reason;
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switch( crash.type )
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{
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case CrashData::SIGNAL:
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{
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reason = ssprintf( "%s - %s", SignalName(crash.signal), SignalCodeName(crash.signal, crash.si.si_code) );
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/* Linux puts the PID that sent the signal in si_addr for SI_USER. */
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if( crash.si.si_code == SI_USER )
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{
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reason += ssprintf( " from pid %li", (long) crash.si.si_addr );
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}
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else
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{
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switch( crash.signal )
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{
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case SIGILL:
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case SIGFPE:
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case SIGSEGV:
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case SIGBUS:
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reason += ssprintf( " at 0x%0*lx", int(sizeof(void*)*2), (unsigned long) crash.si.si_addr );
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}
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break;
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}
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}
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case CrashData::FORCE_CRASH:
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crash.reason[sizeof(crash.reason)-1] = 0;
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reason = crash.reason;
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break;
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}
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fprintf( CrashDump, "Architecture: %s\n", HOOKS->GetArchName().c_str() );
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fprintf( CrashDump, "Crash reason: %s\n", reason.c_str() );
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fprintf( CrashDump, "Crashed thread: %s\n\n", CrashedThread.c_str() );
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fprintf(CrashDump, "Checkpoints:\n");
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for( unsigned i=0; i<Checkpoints.size(); ++i )
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fputs( Checkpoints[i], CrashDump );
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fprintf( CrashDump, "\n" );
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for( int i = 0; i < CrashData::MAX_BACKTRACE_THREADS; ++i )
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{
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if( !crash.BacktracePointers[i][0] )
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break;
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fprintf( CrashDump, "Thread: %s\n", crash.m_ThreadName[i] );
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output_stack_trace( CrashDump, crash.BacktracePointers[i] );
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fprintf( CrashDump, "\n" );
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}
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fprintf( CrashDump, "Static log:\n" );
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fprintf( CrashDump, "%s", Info );
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fprintf( CrashDump, "%s", AdditionalLog );
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fprintf(CrashDump, "\nPartial log:\n" );
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for( int i = 0; i < cnt; ++i )
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fprintf( CrashDump, "%s\n", Recent[i] );
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fprintf( CrashDump, "\n" );
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fprintf( CrashDump, "-- End of report\n" );
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fclose( CrashDump) ;
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#if defined(MACOSX)
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CrashHandler::InformUserOfCrash( sCrashInfoPath );
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#else
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/* stdout may have been inadvertently closed by the crash in the parent;
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* write to /dev/tty instead. */
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FILE *tty = fopen( "/dev/tty", "w" );
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if( tty == NULL )
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tty = stderr;
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fputs( "\n"
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PRODUCT_ID " has crashed. Debug information has been output to\n"
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"\n"
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" " + sCrashInfoPath + "\n"
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"\n"
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"Please report a bug at:\n"
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"\n"
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" " REPORT_BUG_URL "\n"
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"\n", tty );
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#endif
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}
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void CrashHandler::CrashHandlerHandleArgs( int argc, char* argv[] )
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{
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g_pCrashHandlerArgv0 = argv[0];
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if( argc == 2 && !strcmp(argv[1], CHILD_MAGIC_PARAMETER) )
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{
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child_process();
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exit(0);
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}
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}
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/*
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* (c) 2003-2004 Glenn Maynard
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* All rights reserved.
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the
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* "Software"), to deal in the Software without restriction, including
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* without limitation the rights to use, copy, modify, merge, publish,
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* distribute, and/or sell copies of the Software, and to permit persons to
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* whom the Software is furnished to do so, provided that the above
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* copyright notice(s) and this permission notice appear in all copies of
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* the Software and that both the above copyright notice(s) and this
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* permission notice appear in supporting documentation.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
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* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT OF
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* THIRD PARTY RIGHTS. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR HOLDERS
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* INCLUDED IN THIS NOTICE BE LIABLE FOR ANY CLAIM, OR ANY SPECIAL INDIRECT
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* OR CONSEQUENTIAL DAMAGES, OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS
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* OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR
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* OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
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* PERFORMANCE OF THIS SOFTWARE.
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*/
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