void DebugLoop(const TargetInfo& ti)
{
while (true)
{
// Wait for the child to exit or generate a signal requiring our attention
int status;
if (waitpid(ti.m_pid, &status, 0) == -1)
{
assert(!"waitpid() failed");
break;
}
// Handle signal
if (WIFEXITED(status))
{
std::printf("ghd: Child done (%i), exiting\n", WEXITSTATUS(status));
break;
}
else if (WIFSIGNALED(status))
{
std::printf("ghd: Child terminated (%s), exiting\n",
SignalToString(WTERMSIG(status)));
break;
}
else if (WIFSTOPPED(status))
{
// Child has stopped, forwarding us some a signal. Stack trace on fault or continue
const int sig = WSTOPSIG(status);
switch (sig)
{
// Fault?
case SIGSEGV:
case SIGBUS:
case SIGILL:
case SIGFPE:
case SIGSYS:
std::printf("ghd: Child stopped on fault '%s'\n", SignalToString(sig));
TraceProcessState(ti);
return;
case SIGALRM:
// Just ignore this one silently
PTraceContinue(ti.m_pid);
break;
// Continue
default:
std::printf(
"ghd: Received signal '%s' from child, continuing\n",
SignalToString(sig));
PTraceContinue(ti.m_pid);
break;
}
}
else
std::printf("ghd: Unknown event from child\n");
}
}
/********************************************************************
* Pass on selected signals to the slave process.
*******************************************************************/
static void
SignalPassOn(int nSignal)
{
Feedback fb(sSlaveId + " signal handler");
if (child_pid != 0)
{
fb.Info(1) << "Received signal " << nSignal << " (" << SignalToString(nSignal) << "). Passing it on to slave with pid " << child_pid << ".";
kill(child_pid, nSignal);
}
else
fb.Info(1) << "Received signal " << nSignal << " (" << SignalToString(nSignal) << "), but child pid is 0, so it cannot be passed on.";
}
/*
=================
Sys_SigHandler
=================
*/
void Sys_SigHandler( int signal ) {
static qboolean signalcaught = qfalse;
if( signalcaught ) {
VM_Forced_Unload_Start();
Com_Printf("DOUBLE SIGNAL FAULT: Received signal %d: \"%s\", exiting...\n", signal, SignalToString(signal));
exit(1);
} else {
signalcaught = qtrue;
#ifndef DEDICATED
CL_Shutdown( );
#endif
SV_Shutdown( va( "Received signal %d", signal ) );
VM_Forced_Unload_Done();
}
if( signal == SIGTERM || signal == SIGINT ) {
Sys_Exit( 1 );
} else {
Sys_Exit( 2 );
}
}
