大神：
我用真机测试的。apk启动之后有三个进程。对于每个进程都进行了gcore。但是都是失败了，出来的都似乎空文件。在调用gdb命令的之后出显示，求指导：
WARNING: generic atexit() called from legacy shared library
GNU gdb (GDB) 7.2
Copyright (C) 2010 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-linux".
For bug reporting instructions, please see:
<http://www.gnu.org/software/gdb/bugs/>.
Attaching to process 7283
Reading symbols from /system/bin/app_process...(no debugging symbols found)...done.
warning: Unable to fetch general register.
warning: Unable to fetch general register.
Reading symbols from /system/bin/linker...(no debugging symbols found)...done.
Loaded symbols for /system/bin/linker
