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使用交叉gdb 调试 coredump

2012-04-12 16:35 375 查看

准备交叉gdb，即使用你的交叉开发工具编译出来的GDB:

注意一定要是交叉gdb，如果你看到

[root@yjypmypm Debug]# arm-hismall-linux-gdb hello core
GNU gdb 6.3.50.20050627-cvs
Copyright 2004 Free Software Foundation, Inc.
GDB is free software, covered by the GNU General Public License, and you are
welcome to change it and/or distribute copies of it under certain conditions.
Type "show copying" to see the conditions.
There is absolutely no warranty for GDB. Type "show warranty" for details.
This GDB was configured as "--host=i686-pc-linux-gnu --target=arm-hisi-linux"...
GDB can't read core files on this machine.
(gdb)

就说明所使用的gdb 和core 不是同一体系统结构的。

二准备测试程序如下

hello.c
#include <stdio.h>
#include <stdlib.h>
uint uninitVal;
uint initVal=0x5a5a5a5a;
static int SegFault(int *p){
   int *ptr=p;
   *ptr=100;
   return 0;
}
static int invokSegFault(int *p)
{
   SegFault(p);
}
int main(int argc, char** argv) {
      int i=0;
    printf("hello world\r\n");
    printf("uninitVal address 0x%X\r\n",&uninitVal);
    printf("initVal address 0x%X\r\n",&initVal);
    printf("main address 0x%X\r\n",&main);
    write(2,"ddddddddd");
    for(i=0;i<10;i++){
       printf ("current :->>[%d]<<-\r\n",i);
       uninitVal=i;
    }
    SegFault(&uninitVal);
    printf("SegFault 1");
    invokSegFault(0);
    printf("SegFault 0");
    return (42);
}

使用 -g参数编译产生调试信息。

将产生的二进制下载到目标板上。

以下操作在目标板上：

         打开coredump

            使用命令：
ulimit -c unlimited

        运行程序，结果如下：

/mnt $ ./hello
hello world
uninitVal address 0x107E8
initVal address 0x107DC
main address 0x8510
ddcurrent :->>[0]<<-
current :->>[1]<<-
current :->>[2]<<-
current :->>[3]<<-
current :->>[4]<<-
current :->>[5]<<-
current :->>[6]<<-
current :->>[7]<<-
current :->>[8]<<-
current :->>[9]<<-
Segmentation fault (core dumped) ／／已生成 coredump 文件 core

使用gdb读取coredump

/mnt $ gdb hello core

GNU gdb 6.8

Copyright (C) 2008 Free Software Foundation, Inc.

License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>

This is free software: you are free to change and redistribute it.

There is NO WARRANTY, to the extent permitted by law. Type "show copying"

and "show warranty" for details.

This GDB was configured as "arm-hismall-linux"...

Reading symbols from /lib/libc.so.0...done.

Loaded symbols for /lib/libc.so.0

Reading symbols from /lib/ld-uClibc.so.0...done.

Loaded symbols for /lib/ld-uClibc.so.0

Core was generated by `./hello'.                                                //调用时用的命令。

Program terminated with signal 11, Segmentation fault.      //可以看到转储原因。

[New process 515]

#0 0x000084e0 in SegFault (p=0x0) at ../src/hello.c:19

19      ../src/hello.c: No such file or directory.

        in ../src/hello.c

(gdb)

(gdb)where           //查看在发生转储前的栈

#0 0x000084e0 in SegFault (p=0x0) at ../src/hello.c:19

#1 0x0000850c in invokSegFault (p=0x0) at ../src/hello.c:26

#2 0x000085bc in main (argc=1, argv=0xbe91ee74) at ../src/hello.c:45

(gdb)

(gdb)frame 2
                       //查看某一个栈
#2 0x000085bc in main (argc=1, argv=0xbe91ee74) at ../src/hello.c:45
45      in ../src/hello.c
(gdb)

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标签： signal 开发工具 file 测试 c

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