How to use gdb and gdbserver to debug native applications on the Android platform

1.Disable sleep to prevent screen from going black while in the process of debugging.
Settings →Screen sleep timeout →Never

2.build codes:

source build/envsetup.sh
choosecombo 1 1 qsd8250_surf eng

mmm hello showcommands

or

cd ./hello
mm
mm showcommands


we can find that the not-stripped hello is out/target/product/qsd8250_surf/obj/EXECUTABLES/hello_intermediates/LINKED/hello and use the gcc flag "-g" to compile codes.


3.For target:

emulator @qustion
adb shell mkdir /data/debug
adb push ./out/target/product/qsd8250_surf/system/bin/hello /data/debug #在taget端hello可以是被strip的
adb shell gdbserver :5039 /data/debug/hello

4.For host:

adb forward tcp:5039 tcp:5039
prebuilt/linux-x86/toolchain/arm-eabi-4.2.1/bin/arm-eabi-gdb ./out/target/product/qsd8250_surf/obj/EXECUTABLES/hello_intermediates/LINKED/hello
gdb>set solib-absolute-prefix ./out/target/product/qsd8250_surf/symbols
gdb>set solib-search-path ./out/target/product/qsd8250_surf/system/lib/
gdb>file ./out/target/product/qsd8250_surf/obj/EXECUTABLES/hello_intermediates/LINKED/hello #load the symbols of hello
gdb>target remote 127.0.0.1:5039
gdb>sharedlibrary
gdb>b jeff_func
gdb>c

reference:
"MSM7xxx/QSD8xxx Android™ Debug Guide" 80-VM989-1 B
http://groups.google.com/group/android-framework/browse_thread/thread/f3a9fbdef44c1366?fwc=1
http://checko.blogspot.com/2006/05/use-gdbserver-and-gdb-remote-debugging.html

hello.c:

#include

char * jeff_func(){

printf("enter func...ddddd\n");
return "Jeff";
}

int main(){

printf("Hello the world!!\n");

printf("Hello %s!!\n",jeff_func());

return 0;
}

Android.mk:

LOCAL_PATH:= $(call my-dir)
include $(CLEAR_VARS)

LOCAL_SRC_FILES:= hello.c

LOCAL_C_INCLUDES += frameworks/base/include system/core/include

LOCAL_MODULE:= hello

include $(BUILD_EXECUTABLE)