Linux backtrace()

https://man7.org/linux/man-pages/man3/backtrace.3.html

#include <stdio.h>
#include <string.h>
#include <stdint.h>
#include <stdlib.h>
#include "execinfo.h"

typedef uint32_t UINT32;

void fun3(void)
{
    void* array[10] = {0};
    UINT32 size = 0;
    char **strframe = NULL;
    UINT32 i = 0, j = 0;

    size = backtrace(array, 10);
    strframe = (char **)backtrace_symbols(array, size);

    printf("print call frame now: 0x%x
", fun3);
    for(i = 0; i < size; i++)
    {
        printf("frame %d -- %s
", i, strframe[i]);
    }

    if(strframe)
    {
        free(strframe);
        strframe = NULL;
    }
}

void fun2(void)
{
    printf("fun2 0x%x
", fun2);
    fun3();
}

void fun1(void)
{
    printf("fun1 0x%x
", fun1);
    fun2();
}

int main(void)
{
    printf("main 0x%x
", main);
    fun1();
    return 0;
}

[xxxzte.intra@桌面]$ gcc -g -rdynamic backTrace.c

[xxx@zte.intra@桌面]$ ./a.out
main 0x4009b8
fun1 0x400998
fun2 0x400978
print call frame now: 0x4008a6
frame 0 -- ./a.out(fun3+0x4a) [0x4008f0]
frame 1 -- ./a.out(fun2+0x1d) [0x400995]
frame 2 -- ./a.out(fun1+0x1d) [0x4009b5]
frame 3 -- ./a.out(main+0x1d) [0x4009d5]
frame 4 -- /usr/lib64/libc.so.6(__libc_start_main+0xf1) [0x7f2381398401]
frame 5 -- ./a.out(_start+0x2a) [0x4007da]

[xxx@zte.intra@桌面]$ addr2line 0x4009d5 -e ./a.out -f
main
/home/xxx@zte.intra/桌面/backTrace.c:48