linux应用异常时打印堆栈方法

/*
 * 程序异常终止时打印异常程序调用堆栈
 * gcc -g -rdynamic BackTraceTest.c -o BackTraceTest
 *
 * 运行程序出现错误:
 * System error, Stack trace:
 * 0 ./BackTraceTest(SystemErrorHandler+0x77) [0x40095b]
 * 1 /lib64/libc.so.6() [0x3a4fe326b0]
 * 2 ./BackTraceTest(Fun1+0x10) [0x400a10]
 * 3 ./BackTraceTest(Fun+0xe) [0x400a23]
 * 4 ./BackTraceTest(main+0x37) [0x400a5c]
 * 5 /lib64/libc.so.6(__libc_start_main+0xfd) [0x3a4fe1ed5d]
 * 6 ./BackTraceTest() [0x400829]
 * Segmentation fault (core dumped)
 *
 * gdb打印错误行信息
 * gdb BackTraceTest
 * (gdb) info line *0x400a10
 * Line 66 of "BackTraceTest.c" starts at address 0x400a0c <Fun1+12> and ends at 0x400a13 <Fun1+19>.
 * (gdb) list *0x400a10
 * 0x400a10 is in Fun1 (BackTraceTest.c:66).
 * warning: Source file is more recent than executable.
 * 61    }
 * 62
 * 63    void Fun1()
 * 64    {
 * 65        char *p=NULL;
 * 66        *p = 'A';
 * 67    }
 * 68
 * 69    void Fun()
 * 70    {
 *
 *
 * addr2line 定位程序地址对应的源代码位置
 * addr2line  -e BackTraceTest -i 0x400a10
 * /home/cyf/workspace/BackTraceTest/BackTraceTest.c:66
 *
 */
#include<stdio.h>
#include<stdlib.h>
#include<signal.h>
#include<string.h>
#include<execinfo.h>

void SystemErrorHandler(int signum)
{
    const int len=1024;
    void *func[len];
    size_t size;
    int i;
    char **funs;

    signal(signum,SIG_DFL);
    size=backtrace(func,len);
    funs=(char**)backtrace_symbols(func,size);
    fprintf(stderr,"System error, Stack trace:\n");
    for(i=0;i<size;++i) fprintf(stderr,"%d %s \n",i,funs[i]);
    free(funs);
    //exit(1);
}

void Fun1()
{
    char *p=NULL;
    *p = 'A';
}

void Fun()
{
    Fun1();
}

int main(const int argc,const char* argv[])
{
    signal(SIGSEGV,SystemErrorHandler); //Invaild memory address
    signal(SIGABRT,SystemErrorHandler); // Abort signal
    Fun();
    return 0;
}