try-catch.c

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <setjmp.h>
#include <signal.h>

static int sig_to_catch;
static void (^execption_handler)(int sig);
static jmp_buf exception_buffer;

typedef int Exception_t;

#define try  void (^_exec_try_)(void) = ^
#define catch(ex) ; signal(ex, signal_handler); sig_to_catch = ex; execption_handler = ^
#define execute() ;if (setjmp(exception_buffer) == 0) _exec_try_();
#define throw(x) kill(getpid(), x)



static void signal_handler(int i)
{
    if (i != sig_to_catch) return;
    execption_handler(i);
    sig_to_catch = 0;
    longjmp(exception_buffer, i);
}

int main(void)
{
    int *ptr;
    int i = 10;
    
    try {
        throw(SIGSEGV);
    } catch (SIGSEGV) (Exception_t signum) {
        puts("oh noes!");
        printf("Could not set to %d!\nReason: %s\n", i, strsignal(signum));
        printf("Backtrace:\n");

        void *trace[128] = {0};
        int i = backtrace(trace, 128);
        backtrace_symbols_fd(trace, i, STDERR_FILENO);
    } execute();

    puts("Done");
}