gdb_catch_c++_throw2.cpp
Posted by Anonymous on Wed 1st Sep 2021 15:25
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modification of post by Anonymous (view diff)

/*
 * gdb_catch_c++_throw2.cpp demo
 *
 * Use like this:
 * $ g++ -std=c++11 -g gdb_catch_c++_throw1.cpp
 *
 */
#include <stdexcept>
#include <iostream>
#include <stdlib.h>
#include <stdio.h>
#include <unistd.h>
#include <execinfo.h>

class myclass
{
public:
        int death_is_coming = 10;

        /* recursive call to make stack trace bigger */
        void countdown_to_death()
        {
                if (this->death_is_coming-- > 0)
                        this->countdown_to_death();
                this->print_and_throw();
        }
        void print_and_throw()
        {
                std::cout << "#mark 1" << std::endl;
                throw std::exception(); /* gdb should catch this */
        }
};

/*
 * std::exception will call std::terminate() to terminate the process.
 * NO C++ CODE is allowed at this point, use plain ISO C and ISO C
 * I/O only!!
 */
void std::terminate()
{
#define MAX_SIZE (1024)
        size_t size;
        void *array[MAX_SIZE];
        size = backtrace(array, MAX_SIZE);
        backtrace_symbols_fd(array, size, STDERR_FILENO);
        exit(EXIT_FAILURE);
}

int main(int ac, char **av)
{
        myclass x;
        x.countdown_to_death();

        return EXIT_SUCCESS;
}