void FatalConditionHandler::reset() {
if (isSet) {
// Unregister handler and restore the old guarantee
RemoveVectoredExceptionHandler(exceptionHandlerHandle);
SetThreadStackGuarantee(&guaranteeSize);
exceptionHandlerHandle = nullptr;
isSet = false;
}
}
FatalConditionHandler::FatalConditionHandler() {
isSet = true;
// 32k seems enough for Catch to handle stack overflow,
// but the value was found experimentally, so there is no strong guarantee
guaranteeSize = 32 * 1024;
exceptionHandlerHandle = nullptr;
// Register as first handler in current chain
exceptionHandlerHandle = AddVectoredExceptionHandler(1, handleVectoredException);
// Pass in guarantee size to be filled
SetThreadStackGuarantee(&guaranteeSize);
}
Value catchRuntimeExceptions(const std::function<Value()>& thunk)
{
// Ensure that there's enough space left on the stack in the case of a stack overflow to prepare the stack trace.
ULONG stackOverflowReserveBytes = 32768;
SetThreadStackGuarantee(&stackOverflowReserveBytes);
Exception* runtimeException = nullptr;
__try
{
return thunk();
}
__except(sehFilterFunction(GetExceptionInformation(),runtimeException))
{}
if(runtimeException->cause == Exception::Cause::StackOverflow)
{
// After a stack overflow, the stack will be left in a damaged state. Let the CRT repair it.
_resetstkoflw();
}
return Value(runtimeException);
}