static int DoSysPageFaultExceptionFilter( EXCEPTION_POINTERS* eps )
{
if( eps->ExceptionRecord->ExceptionCode != EXCEPTION_ACCESS_VIOLATION )
return EXCEPTION_CONTINUE_SEARCH;
// Note: This exception can be accessed by the EE or MTVU thread
// Source_PageFault is a global variable with its own state information
// so for now we lock this exception code unless someone can fix this better...
Threading::ScopedLock lock(PageFault_Mutex);
Source_PageFault->Dispatch( PageFaultInfo( (uptr)eps->ExceptionRecord->ExceptionInformation[1] ) );
return Source_PageFault->WasHandled() ? EXCEPTION_CONTINUE_EXECUTION : EXCEPTION_CONTINUE_SEARCH;
}
// Linux implementation of SIGSEGV handler. Bind it using sigaction().
static void SysPageFaultSignalFilter( int signal, siginfo_t *siginfo, void * )
{
// [TODO] : Add a thread ID filter to the Linux Signal handler here.
// Rationale: On windows, the __try/__except model allows per-thread specific behavior
// for page fault handling. On linux, there is a single signal handler for the whole
// process, but the handler is executed by the thread that caused the exception.
// Stdio Usage note: SIGSEGV handling is a synchronous in-thread signal. It is done
// from the context of the current thread and stackframe. So long as the thread is not
// the main/ui thread, use of the px assertion system should be safe. Use of stdio should
// be safe even on the main thread.
// (in other words, stdio limitations only really apply to process-level asynchronous
// signals)
// Note: Use of stdio functions isn't safe here. Avoid console logs,
// assertions, file logs, or just about anything else useful.
// Note: This signal can be accessed by the EE or MTVU thread
// Source_PageFault is a global variable with its own state information
// so for now we lock this exception code unless someone can fix this better...
Threading::ScopedLock lock(PageFault_Mutex);
Source_PageFault->Dispatch( PageFaultInfo( (uptr)siginfo->si_addr & ~m_pagemask ) );
// resumes execution right where we left off (re-executes instruction that
// caused the SIGSEGV).
if (Source_PageFault->WasHandled()) return;
if (!wxThread::IsMain())
{
pxFailRel(pxsFmt("Unhandled page fault @ 0x%08x", siginfo->si_addr));
}
// Bad mojo! Completely invalid address.
// Instigate a trap if we're in a debugger, and if not then do a SIGKILL.
wxTrap();
if (!IsDebugBuild) raise( SIGKILL );
}
