linux下C应用程序打印调用栈

使用GCC编译的C应用程序，如果想在某个接口中打印调用栈，可以使用gcc的backtraces特性

Backtraces说明中有一个例子，代码如下：

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

/* Obtain a backtrace and print it to stdout. */
void
print_trace (void)
{
  void *array[10];
  char **strings;
  int size, i;

  size = backtrace (array, 10);
  strings = backtrace_symbols (array, size);
  if (strings != NULL)
  {

    printf ("Obtained %d stack frames.\n", size);
    for (i = 0; i < size; i++)
      printf ("%s\n", strings[i]);
  }

  free (strings);
}

/* A dummy function to make the backtrace more interesting. */
void
dummy_function (void)
{
  print_trace ();
}

int
main (void)
{
  dummy_function ();
  return 0;
}

直接通过gcc来编译运行，结果如下：

itsenlin@itsenlin-virtual-machine:~/code/test$ gcc -o backtr backtr.c
itsenlin@itsenlin-virtual-machine:~/code/test$ ./backtr
Obtained 6 stack frames.
./backtr(+0x1215) [0x559a1a0b2215]
./backtr(+0x12b1) [0x559a1a0b22b1]
./backtr(+0x12c1) [0x559a1a0b22c1]
/lib/x86_64-linux-gnu/libc.so.6(+0x29d90) [0x7f779d629d90]
/lib/x86_64-linux-gnu/libc.so.6(__libc_start_main+0x80) [0x7f779d629e40]
./backtr(+0x1125) [0x559a1a0b2125]
itsenlin@itsenlin-virtual-machine:~/code/test$

如果想显示函数名，还需要在编译时添加-rdynamic选项，如下

itsenlin@itsenlin-virtual-machine:~/code/test$ gcc -o backtr backtr.c -rdynamic
itsenlin@itsenlin-virtual-machine:~/code/test$ ./backtr
Obtained 6 stack frames.
./backtr(print_trace+0x2c) [0x560984d66215]
./backtr(dummy_function+0xd) [0x560984d662b1]
./backtr(main+0xd) [0x560984d662c1]
/lib/x86_64-linux-gnu/libc.so.6(+0x29d90) [0x7f860a029d90]
/lib/x86_64-linux-gnu/libc.so.6(__libc_start_main+0x80) [0x7f860a029e40]
./backtr(_start+0x25) [0x560984d66125]
itsenlin@itsenlin-virtual-machine:~/code/test$ vim backtr.c
itsenlin@itsenlin-virtual-machine:~/code/test$