[Help!!!] How to use ndk-gdb with cocos2d-x application????

I’m writing a game,
it can run well on win32,
but will crash on Android mobile.

So I tried to use NDK-GDB by using the following steps…
1.$NDK/ndk-gdb —start

2.(gdb) file ./obj/local/armeabi/libgame.so

3.try to add a breakpoint, and it seems successful?
(gdb) break sol::GET_BLK
Breakpoint 1 at 0x115d74: file jni/…/…/Classes/sol/SolData.cpp, line 10062.

4.continue my application, and it will crash, but my gdb can not catch the signal???

Child terminated with signal = b
Program terminated with signal SIGSEGV, Segmentation fault.

Who can give me any advice?
Thank you very much~~