I want to debug opencore with the "arm-eabi-gdb" and "gdbserver" under
android, by attaching to the process "mediaserver".
But the process "/system/bin/mediaserver" always terminated with
signal = 0x5.
I built the code with "lunch 1" and use NFS.
Here is my debug operation:
On the target (arm device):
1. Launch a JAVA video player application. Record the PID of
mediaserver (eg. 1787)
2. #./gdbserver :3000 --attach 1787
Attached; pid = 1787
Listening on port 3000
Then on the host, run the cross gdb "arm-eabi-gdb":
$/home/amanda/mydroid/prebuilt/linux-x86/toolchain/arm-eabi-4.2.1/bin/
arm-eabi-gdb
/home/amanda/mydroid/out/target/product/generic/symbols/system/bin/
mediaserver
(gdb)set solib-search-path /home/amanda/mydroid/out/target/product/
generic/symbols/system/lib
(gdb)target remote 10.192.225.49:3000
(--- 10.192.225.49 is my target board IP, the target is
connected
and display:
Remote debugging from host 10.192.224.119 (my host IP)
gdb: Unable to get location for thread creation breakpoint:
requested event is not supported
gdb: Unable to get location for thread creation breakpoint:
requested event is not supported)
(gdb)sharedlibrary
I got an error and warning like this
Error while mapping shared library sections:
/system/bin/linker: No such file or directory.
...
warning: .dynamic section for "/home/amanda/mydroid/out/target/
product/generic/symbols/system/lib/libopencorecommon.so" is not at the
expected address (wrong library or version mismatch?)
--- I don't know why. But most libraries' symbol are loaded
successfully.
Then I tried to set a breakpoint and it seems ok
(gdb)b AndroidSurfaceOutput::initCheck()
Breakpoint 1 at 0xa71a49b0: file external/opencore//android/
android_surface_output.cpp, line 1068.
(gdb) c
Continuing.
However, when I let the video player try to play a MP4 clip. The
"mediaserver" process terminated unexpectedly.
The host gdb display:
Program terminated with signal SIGTRAP, Trace/breakpoint trap.
The program no longer exists.
And the target display:
hild terminated with signal = 5
Child terminated with signal = 0x5
It seems the breakpoint is shot and it cause media server to
terminate.
Could anybody give me some advice? Many thanks!
Jasperr
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