fault_manager.c

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#include "common.h"
#include <execinfo.h>
 
static struct sigaction action = {0};
 
void dummy_fault_handler()
{
 
    void *array[10];
    size_t size;
 
    //get void*'s for all entries on the stack
    size = backtrace(array, 10);
 
    // print out all the frames to stderr
    backtrace_symbols_fd(array, size, STDERR_FILENO);
    // gracefulexit
    // closing_logger_manager
    
    // closing_memory_manager
    mem_finit();
 
    printf("gracefullexit\n");
}
 
void default_fault_handler(int signo, siginfo_t *info, void *extra)
{
    printf("Signal %d received\n", signo);
    dummy_fault_handler();
    abort();
}
 
 
void fault_manager_init(f_fault_handle handler)
{
    // If no fault handler define use default
    if (handler == NULL) {
        printf("fault_handler_undefined using deafult_fault_handler\n");
        handler = default_fault_handler;
        
    }
 
    // Add signals to be handle
    action.sa_flags = SA_SIGINFO;
    action.sa_sigaction = handler;
 
    // Handle fatal arithmetic error such as floating pt exception
    if (sigaction(SIGFPE, &action, NULL) == -1) {
        perror("sigfpe: sigaction");
        exit(1);
    }
    // Handle segmentation fault
    if (sigaction(SIGSEGV, &action, NULL) == -1) {
        perror("sigsegv: sigaction");
        exit(1);
    }
    // Handles corrupted executable or stack overflow
    if (sigaction(SIGILL, &action, NULL) == -1) {
        perror("sigill: sigaction");
        exit(1);
    }
    // Handles interpts
    if (sigaction(SIGINT, &action, NULL) == -1) {
        perror("sigint: sigaction");
        exit(1);
    }
    // handles termination signal
    if (sigaction(SIGTERM, &action, NULL) == -1) {
        perror("sigterm: sigaction");
        exit(1);
    }
}
 
/* TODO enchancment:
- mechanism for handling multiple signals
- mechanism mutiple handlers for multiple signals
- create fault_manager close
- module to register routine to be called when fault
- 
 
*/