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we only run our handler for exceptions that we know we can't recover from

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This commit is contained in:
myT 2017-05-17 07:48:26 +02:00
parent 8e2aafbdfd
commit 76ab2a5d6d
1 changed files with 51 additions and 4 deletions
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55
code/win32/win_exception.cpp
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@ -363,6 +363,50 @@ static int WINAPI WIN_WriteExceptionFiles( EXCEPTION_POINTERS* pExceptionPointer
return EXCEPTION_EXECUTE_HANDLER;
}
static qbool WIN_ShouldContinueSearch( DWORD exceptionCode )
{
// Obviously, this piece of code must be *very* careful with what exception codes are handled.
// Invoking our handler on a non-crash will shut down the application when it shouldn't.
// Not invoking our handler on a crash means the app shuts down immediately with no crash report.
// As you can see, neither scenario is desirable...
switch (exceptionCode) {
// The following should always invoke our handler.
case EXCEPTION_ACCESS_VIOLATION:
case EXCEPTION_ARRAY_BOUNDS_EXCEEDED:
case EXCEPTION_DATATYPE_MISALIGNMENT:
case EXCEPTION_FLT_DIVIDE_BY_ZERO:
case EXCEPTION_FLT_INVALID_OPERATION:
case EXCEPTION_FLT_STACK_CHECK:
case EXCEPTION_IN_PAGE_ERROR:
case EXCEPTION_INT_DIVIDE_BY_ZERO:
case EXCEPTION_ILLEGAL_INSTRUCTION:
case EXCEPTION_NONCONTINUABLE_EXCEPTION:
case EXCEPTION_PRIV_INSTRUCTION:
case EXCEPTION_STACK_OVERFLOW:
// The debugger has first-chance access.
// Therefore, if we get these, we should stop too.
case EXCEPTION_BREAKPOINT:
case EXCEPTION_SINGLE_STEP:
return qfalse;
// We don't handle the rest.
// Please leave the commented lines so we know what's being allowed.
//case DBG_PRINTEXCEPTION_C: // used by OutputDebugStringA/W
//case EXCEPTION_FLT_INEXACT_RESULT:
//case EXCEPTION_FLT_DENORMAL_OPERAND:
//case EXCEPTION_FLT_OVERFLOW:
//case EXCEPTION_FLT_UNDERFLOW:
//case EXCEPTION_INT_OVERFLOW:
//case EXCEPTION_INVALID_DISPOSITION: // should not happen
//case EXCEPTION_POSSIBLE_DEADLOCK: // STATUS_POSSIBLE_DEADLOCK is not defined
//case EXCEPTION_GUARD_PAGE: // we hit the stack guard page (used for growing the stack)
//case EXCEPTION_INVALID_HANDLE: // invalid kernel object (may have been closed)
default:
return qtrue;
}
}
//
// The exception handler's job is to reset system settings that won't get reset
// as part of the normal process clean-up by the OS.
@ -387,10 +431,13 @@ static qbool exc_exitCalled = qfalse;
LONG CALLBACK WIN_HandleException( EXCEPTION_POINTERS* ep )
{
// Allow calls to OutputDebugStringA/W.
if (ep != NULL && ep->ExceptionRecord != NULL &&
ep->ExceptionRecord->ExceptionCode == DBG_PRINTEXCEPTION_C)
return EXCEPTION_CONTINUE_SEARCH;
if (ep != NULL && ep->ExceptionRecord != NULL) {
qbool contSearch = WIN_ShouldContinueSearch(ep->ExceptionRecord->ExceptionCode);
if (contSearch && (ep->ExceptionRecord->ExceptionFlags & EXCEPTION_NONCONTINUABLE) != 0)
contSearch = qfalse;
if (contSearch)
return EXCEPTION_CONTINUE_SEARCH;
}
__try {
WIN_EndTimePeriod();