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Forcibly ignore bogus floating point exceptions.

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This commit is contained in:
Glenn Maynard
2003-07-30 01:15:56 +00:00
parent 265f1f8923
commit 0ddc939e62
1 changed files with 21 additions and 1 deletions
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stepmania/src/archutils/Win32/Crash.cpp
+21 -1
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@@ -272,7 +272,27 @@ static void DoEraseEmergencyDump()
} }
extern HWND g_hWndMain; extern HWND g_hWndMain;
long __stdcall CrashHandler(EXCEPTION_POINTERS *pExc) { long __stdcall CrashHandler(EXCEPTION_POINTERS *pExc)
{
/* We aren't supposed to receive these exceptions. For example, if you do
* a floating point divide by zero, you should receive a result of #INF. Only
* if the floating point exception for _EM_ZERODIVIDE is unmasked does this
* exception occur, and we never unmask it.
*
* However, once in a while some driver or library turns evil and unmasks an
* exception flag on us. If this happens, re-mask it and continue execution. */
switch( pExc->ExceptionRecord->ExceptionCode )
{
case EXCEPTION_FLT_INVALID_OPERATION:
case EXCEPTION_FLT_DENORMAL_OPERAND:
case EXCEPTION_FLT_DIVIDE_BY_ZERO:
case EXCEPTION_FLT_OVERFLOW:
case EXCEPTION_FLT_UNDERFLOW:
case EXCEPTION_FLT_INEXACT_RESULT:
pExc->ContextRecord->FloatSave.ControlWord |= 0x3F;
return EXCEPTION_CONTINUE_EXECUTION;
}
/* If we're fullscreen, the fullscreen d3d window will obscure /* If we're fullscreen, the fullscreen d3d window will obscure
* the crash dialog. Do this before we suspend threads, or it'll * the crash dialog. Do this before we suspend threads, or it'll
* deadlock if the thread controlling this window has been stopped. */ * deadlock if the thread controlling this window has been stopped. */