void printStackAndExit( int signalNum ) {
const int fd = 0;
formattedWrite( fd , "Received signal %d\n" , signalNum );
formattedWrite( fd , "Backtrace: " );
formattedBacktrace( fd );
formattedWrite( fd , "===\n" );
::_exit( EXIT_ABRUPT );
}
void printStackAndExit( int signalNum ) {
int fd = Logstream::getLogDesc();
if ( fd >= 0 ) {
formattedWrite( fd , "Received signal %d\n" , signalNum );
formattedWrite( fd , "Backtrace: " );
formattedBacktrace( fd );
formattedWrite( fd , "===\n" );
}
::_exit( EXIT_ABRUPT );
}
static void formattedBacktrace( int fd ) {
#ifdef MONGO_HAVE_EXECINFO_BACKTRACE
int numFrames;
const int MAX_DEPTH = 20;
void* stackFrames[MAX_DEPTH];
numFrames = backtrace( stackFrames , 20 );
for ( int i = 0; i < numFrames; i++ ) {
formattedWrite( fd , "%p " , stackFrames[i] );
}
formattedWrite( fd , "\n" );
backtrace_symbols_fd( stackFrames , numFrames , fd );
#else
formattedWrite( fd, "backtracing not implemented for this platform yet\n" );
#endif
}