linux c 程序异常退出

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

void handle_sigsegv(int sig) {
    fprintf(stderr, "Caught SIGSEGV: Segmentation fault\n");
    exit(1);
}

int main() {
    signal(SIGSEGV, handle_sigsegv);

    // 故意触发段错误
    int *ptr = NULL;
    *ptr = 1;  // 这将导致SIGSEGV

    return 0;
}

gcc -g -o myprogram myprogram.c
gdb ./myprogram
(gdb) run
(gdb) backtrace

valgrind --tool=memcheck ./myprogram

#include <stdio.h>
#include <stdlib.h>

void log_error(const char *msg) {
    fprintf(stderr, "[%s] %s\n", __func__, msg);
}

int main() {
    log_error("Starting program");

    // 模拟错误
    int *ptr = NULL;
    if (ptr == NULL) {
        log_error("Pointer is NULL");
        exit(1);
    }

    log_error("Program finished successfully");
    return 0;
}