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Android下用gdb远程调试办法

刊登方式:转载   来源:网络  作者:  关键词:平面设计理念  更新时间:2017/10/10

   Host: ubuntu

  Target: Android ICS

  1. 将gdbserver和gdbclient分别放入target和host。两者都可在android源代码的prebuilt目录下找到。

  2. 在Target上启动gdbserver,在adb shell中执行

  $ /path/to/gdbserver :1111--attach PID

  其中PID为想要debug程序的进程号,可以通过ps得到。1111为端口号,可以自定义。

  3. 在Host上启动gdbclient,首先将target上的库pull到host上(如/home/jzj/debug/gdb)

  $cd /home/jzj/debug/gdb

  $adb pull /system/lib

  $adb pull /system/bin/app_process

  然后写启动脚本init.gdb(这里假设程序要用到的库放在/home/jzj/debug/gdb/下,android的symbol放在/home/jzj/debug/ics/symbols/system/lib/下,android的源码放在/home/jzj/workspace/ics下)

  file /home/jzj/debug/gdb/app_process

  set solib-absolute-prefix /home/jzj/debug/ics/symbols/

  set solib-search-path /home/jzj/debug/ics/symbols/system/lib/:/home/jzj/debug/gdb

  dir /home/jzj/workspace/ics

  shell adb forward tcp:1111 tcp:1111

  target remote :1111

  最后执行

  $ gdb -x init.gdb

  就可以启动gdb了。一切正常的话这时候就可以用gdb的基本功能,如设断点或者查看内存了。这时有些so库的符号表可能还没载入,可以执行

  (gdb) shared

  载入这些符号表。

  最后附个关于gdb设置脚本中两个变量的官方解释,一般solib-absolute-prefix先于solib-search-path查找。

  solib-absolute-prefix :

  If this variable is set, path will be used as a prefix for any absolute shared library paths; many runtime loaders store the absolute paths to the shared library in the target program's memory. If you use `solib-absolute-prefix' to find shared libraries, they need to be laid out in the same way that they are on the target, with e.g. a `/usr/lib' hierarchy under path. You can set the default value of `solib-absolute-prefix' by using the configure-time `--with-sysroot' option.

  solib-search-path :

  If this variable is set, path is a colon-separated list of directories to search for shared libraries. `solib-search-path' is used after `solib-absolute-prefix' fails to locate the library, or if the path to the library is relative instead of absolute. If you want to use `solib-search-path' instead of `solib-absolute-prefix', be sure to set `solib-absolute-prefix' to a nonexistant directory to prevent GDB from finding your host's libraries.