CODEWITHSUNDEEP
c++exception
prgDevelop
prgDevelop

Reputation: 1587

Handling access violation in applications

My x64 application is compiled with /EHa,

I want to guard my code against access violations, but the application process seems to crash regardless of my SEH and termination handlers.

void my_se_translator(unsigned int, struct _EXCEPTION_POINTERS*) {
    cout << "se_translator_called" << endl;
}

void my_terminate_handler() {
    cout << "my_terminate_handler_called" << endl;
}

#pragma optimize("", off)
void test() {

    int* k = nullptr;
    int z = *k;
}
#pragma optimize("", on)

int main(int argc, char* argv[]) {

    _set_se_translator(my_se_translator);
    set_terminate(my_terminate_handler);

    test();

    return 0;
}

Would appreciate a good explanation for why _set_se_translator does not work in this case?

Upvotes: 2

Views: 2063

Answers (1)

rainman
rainman

Reputation: 121

From the MSDN website:

Your translator function should do no more than throw a C++ typed exception. If it does anything in addition to throwing (such as writing to a log file, for example) your program might not behave as expected, because the number of times the translator function is invoked is platform-dependent.

when you add a simple exception class:

class myException{
};

Then throw the exception in the my_se_translator function, and catch the exception in either the main or test function your example should work.

void my_se_translator(unsigned int, struct _EXCEPTION_POINTERS*) {
    std::cout << "se_translator_called" << std::endl;
    throw myException();
}

int main(int argc, char* argv[]) {


    _set_se_translator(my_se_translator);
    set_terminate(my_terminate_handler);
    try{
        test();
    }
    catch(myException e) {
        std::cout << "EXCEPTION!" << std::endl;
    }
    return 0;
}

Upvotes: 2

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