【Linux】直接打印堆栈调试信息

 

1,目前最简单的办法时gdb,运行调试.

https://www.bogotobogo.com/Linux/debugging_gdb.php

2,使用backtrace

linux  journalctl 命令也可以查看.或直接输入代码中.

https://cloud.tencent.com/developer/article/2286090?areaSource=102001.7&traceId=2yACtnVrq4Oa5oN_wA9RT

使用 signal(signum,SIG_DFL); size = backtrace(array,100); strings = (char**)backtrace_symbols(array,size);

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

//信号钩子函数，获取栈信息，然后打印
void handle_segv(int signum){
    void *array[100];
    size_t size;
    char **strings;
    size_t i;

    signal(signum,SIG_DFL);
    size = backtrace(array,100);
    strings = (char**)backtrace_symbols(array,size);

    fprintf(stderr,"Launcher received SIG:%d Stack trace:\n",signum);
    for(i = 0;i <size;i++){
        fprintf(stderr,"%d %s\n",i,strings[i]);
    }
    free(strings);
}
int func(int* p){
    int y = *p;
    return y;
}
int main(void){
    int *p = NULL;
    signal(SIGSEGV,handle_segv);
    signal(SIGABRT,handle_segv);
    return func(p);
}

gcc -g demo.c -o demo