/*
* Null exception - catches bad memory accesses.
*/
static void
nullException(SIGNAL_ARGS(sig, ctx))
{
void *stackptr;
DEFINEFRAME();
/* Restore the signal handler if necessary */
restoreSyncSignalHandler(sig, nullException);
/* Clean up the synchronous signal state (just unblock this signal) */
unblockSignal(sig);
EXCEPTIONFRAME(frame, ctx);
#if defined(STACK_POINTER)
stackptr = (void *)STACK_POINTER(GET_SIGNAL_CONTEXT_POINTER(ctx));
#if defined(STACK_GROWS_UP)
if (currentJThread != NULL && stackptr >= currentJThread->stackEnd)
#else
if (currentJThread != NULL && stackptr <= currentJThread->stackBase)
#endif
stackOverflowHandler(EXCEPTIONFRAMEPTR);
else
#endif // STACK_POINTER
nullHandler(EXCEPTIONFRAMEPTR);
}
static void profileTimerHandler(SIGNAL_ARGS(sig UNUSED, sc))
{
SIGNAL_CONTEXT_POINTER(scp) = GET_SIGNAL_CONTEXT_POINTER(sc);
char *addr = (char *)SIGNAL_PC(scp);
if( kaffe_memory_samples && xProfRecord )
{
if( profiler_sample_override_pc )
{
profiler_sample_overrides++;
/* Use the override address */
addr = profiler_sample_override_pc;
/* Null it out to stop false positives */
profiler_sample_override_pc = 0;
}
memoryHit(kaffe_memory_samples, addr);
}
}