如何打印出call trace中的函数名

camber_hu

写了个程序，当程序异常时，捕捉内核发送的信号，然后想把栈上的call trace打印出来；

问题是，栈上都是函数地址，如何找到地址所对应的函数名呢？

我目前都是手动反汇编ELF文件，然后根据地址去找函数，有没有方法可以让程序自己找到地址所对应的函数名呢？

MMMIX

回复 1# camber_hu


    http://stackoverflow.com/questio ... -function-call-in-c

xiyoulaoyuanjia

连接十分不错~~  刚刚的~~   

1. With the GNU C Library, you can use the backtrace module. Here is an example for that:
   
2. 
   
3. #include <stdio.h>
   
4. #include <execinfo.h>
   
5. #include <stdlib.h>
   
6. 
   
7. 
   
8. void handler(char *caller) {
   
9.   void *array[10];
   
10.   size_t size;
    
11.   printf("Stack Trace Start for %s\n",caller);
    
12.   size = backtrace(array, 10);
    
13.   backtrace_symbols_fd(array, size, 2);
    
14.   printf("Stack Trace End\n");
    
15. }
    
16. 
    
17. void car() {
    
18.     handler("car()");
    
19.     printf("Continue Execution");
    
20. }
    
21. void baz() {car(); }
    
22. 
    
23. void bar() { baz(); }
    
24. void foo() { bar(); }
    
25. 
    
26. 
    
27. int main(int argc, char **argv) {
    
28.   foo();
    
29. }
    
30. compile with -g -rdynamic compiler option to load the symbols
    
31. 
    
32. gcc -g -rdynamic Test1.c -o Test
    
33. You will see an output similar to
    
34. 
    
35. Stack Trace Start for car()
    
36. ./Test(handler+0x2d)[0x80486f1]
    
37. ./Test(car+0x12)[0x804872e]
    
38. ./Test(baz+0xb)[0x8048747]
    
39. ./Test(bar+0xb)[0x8048754]
    
40. ./Test(foo+0xb)[0x8048761]
    
41. ./Test(main+0xb)[0x804876e]
    
42. /lib/i386-linux-gnu/libc.so.6(__libc_start_main+0xe7)[0x126e37]
    
43. ./Test[0x8048631]
    
44. Stack Trace End
    
45. Continue Execution in car
    
46. You can write this handler function and call from anywhere in your program at any number of time. Remember to increase the array size as required.

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ivy_zhao

Very good. Thank you very much!