开发环境:
NDK r7:
SDK,工具:r15
AVD: GB2.3.3, API Level 10
在此之后，我得到了这样的错误
#0 0xafd0c51c in epoll_wait () from /Volumes/SecureCode/webos/rta/android/obj/local/armeabi/libc.so
#1 0xa81216a6 in ?? ()
我在谷歌上找到了这个解决方案(链接在这里)。
我遵循这里的指导线
$ adb pull /system/lib lib
$ ndk-gdb
...
(gdb) set solib-search-path lib
但在此之后，我也无法达到断点。我仍然卡在这个poll_wait()上，没有继续前进。
D:EclipseTestWorkspaceCallbackJava>sh
sh-4.1$ ndk-gdb --force --start --verbose
Android NDK installation path: /cygdrive/c/Android/android-ndk
Using default adb command: /cygdrive/c/Android/android-sdk-windows/platform-tools/adb
ADB version found: Android Debug Bridge version 1.0.29
Using final ADB command: '/cygdrive/c/Android/android-sdk-windows/platform-tools/adb'
Using auto-detected project path: .
Found package name: com.callback
ABIs targetted by application: armeabi
Device API Level: 10
Device CPU ABI: armeabi
Compatible device ABI: armeabi
Found debuggable flag: true
Found device gdbserver: /data/data/com.callback/lib/gdbserver
Using gdb setup init: ./libs/armeabi/gdb.setup
Using toolchain prefix: /cygdrive/c/Android/android-ndk/toolchains/arm-linux-androideabi-4.4.3/prebuilt/windows/bin/arm-linux-androideabi-
Using app out directory: ./obj/local/armeabi
Found data directory: '/data/data/com.callback'
Found first launchable activity: .CallbackJavaActivity
Launching activity: com.callback/.CallbackJavaActivity
## COMMAND: /cygdrive/c/Android/android-sdk-windows/platform-tools/adb shell am start -n com.callback/.CallbackJavaActivity
Starting: Intent { cmp=com.callback/.CallbackJavaActivity }
## COMMAND: /cygdrive/c/Android/android-sdk-windows/platform-tools/adb shell sleep 2
Found running PID: 352
Launched gdbserver succesfully.
## COMMAND: /cygdrive/c/Android/android-sdk-windows/platform-tools/adb shell run-as com.callback lib/gdbserver +debug-socket --attach 352
Setup network redirection
## COMMAND: /cygdrive/c/Android/android-sdk-windows/platform-tools/adb forward tcp:5039 localfilesystem:/data/data/com.callback/debug-socket
## COMMAND: /cygdrive/c/Android/android-sdk-windows/platform-tools/adb pull /system/bin/app_process obj/local/armeabi/app_process
Attached; pid = 352
Listening on sockaddr socket debug-socket
19 KB/s (5660 bytes in 0.281s)
Pulled app_process from device/emulator.
## COMMAND: /cygdrive/c/Android/android-sdk-windows/platform-tools/adb pull /system/lib/libc.so obj/local/armeabi/libc.so
80 KB/s (273868 bytes in 3.325s)
Pulled libc.so from device/emulator.
GNU gdb 6.6
Copyright (C) 2006 Free Software Foundation, Inc.
GDB is free software, covered by the GNU General Public License, and you are
welcome to change it and/or distribute copies of it under certain conditions.
Type "show copying" to see the conditions.
There is absolutely no warranty for GDB. Type "show warranty" for details.
This GDB was configured as "--host=i586-mingw32msvc --target=arm-elf-linux".
(no debugging symbols found)
Error while mapping shared library sections:
/system/bin/linker: No such file or directory.
----- So many similar errors -----
Error while mapping shared library sections:
gralloc.default.so: No such file or directory.
(no debugging symbols found)
warning: Unable to find dynamic linker breakpoint function.
GDB will be unable to debug shared library initializers
and track explicitly loaded dynamic code.
warning: shared library handler failed to enable breakpoint
0xafd0c51c in epoll_wait () from D:/EclipseTestWorkspace/CallbackJava/obj/local/armeabi/libc.so
(gdb) set solib-search-path lib
Error while mapping shared library sections:
/system/bin/linker: No such file or directory.
Error while mapping shared library sections:
gralloc.default.so: No such file or directory.
Symbol file not found for /system/bin/linker
Reading symbols from D:EclipseTestWorkspaceCallbackJava/lib/libc.so...(no debugging symbols found)...done.
Loaded symbols for D:EclipseTestWorkspaceCallbackJava/lib/libc.so
----- So many similar errors -----
Loaded symbols for D:EclipseTestWorkspaceCallbackJava/lib/libwebcore.so
Symbol file not found for gralloc.default.so
(gdb) file ./libs/armeabi/libcallbacks.so
A program is being debugged already.
Are you sure you want to change the file? (y or n) y
Reading symbols from D:EclipseTestWorkspaceCallbackJava/./libs/armeabi/libcallbacks.so...(no debugging symbols found)...done.
(gdb) file ./obj/local/armeabi/libcallbacks.so
A program is being debugged already.
Are you sure you want to change the file? (y or n) y
Reading symbols from D:EclipseTestWorkspaceCallbackJava/./obj/local/armeabi/libcallbacks.so...done.
(gdb) break callbacks_java.cpp:appcallback_register
Breakpoint 1 at 0x1a64: file D:/EclipseTestWorkspace/CallbackJava/jni/callbacks_java.cpp, line 419.
(gdb) info breakpoints
Num Type Disp Enb Address What
1 breakpoint keep y 0x00001a64 in appcallback_register at D:/EclipseTestWorkspace/CallbackJava/jni/callbacks_java.cpp:419
(gdb) where
#0 0xafd0c51c in epoll_wait () from D:EclipseTestWorkspaceCallbackJava/lib/libc.so
#1 0xa81211b4 in android::Looper::pollInner () from D:EclipseTestWorkspaceCallbackJava/lib/libutils.so
#2 0x00000000 in ?? ()
(gdb) where
#0 0xafd0c51c in epoll_wait () from D:EclipseTestWorkspaceCallbackJava/lib/libc.so
#1 0xa81211b4 in android::Looper::pollInner () from D:EclipseTestWorkspaceCallbackJava/lib/libutils.so
#2 0x00000000 in ?? ()
(gdb) c
Continuing.
Warning:
Cannot insert breakpoint 1.
Error accessing memory address 0x1a64: Input/output error.
(gdb)
我想集中在主要部分
(gdb) file ./libs/armeabi/libcallbacks.so
A program is being debugged already.
Are you sure you want to change the file? (y or n) y
Reading symbols from D:EclipseTestWorkspaceCallbackJava/./libs/armeabi/libcallbacks.so...(no debugging symbols found)...done.
(gdb) file ./obj/local/armeabi/libcallbacks.so
A program is being debugged already.
Are you sure you want to change the file? (y or n) y
Reading symbols from D:EclipseTestWorkspaceCallbackJava/./obj/local/armeabi/libcallbacks.so...done.
(gdb) break callbacks_java.cpp:appcallback_register
Breakpoint 1 at 0x1a64: file D:/EclipseTestWorkspace/CallbackJava/jni/callbacks_java.cpp, line 419.
(gdb) info breakpoints
Num Type Disp Enb Address What
1 breakpoint keep y 0x00001a64 in appcallback_register at D:/EclipseTestWorkspace/CallbackJava/jni/callbacks_java.cpp:419
(gdb) where
#0 0xafd0c51c in epoll_wait () from D:EclipseTestWorkspaceCallbackJava/lib/libc.so
#1 0xa81211b4 in android::Looper::pollInner () from D:EclipseTestWorkspaceCallbackJava/lib/libutils.so
#2 0x00000000 in ?? ()
(gdb) where
#0 0xafd0c51c in epoll_wait () from D:EclipseTestWorkspaceCallbackJava/lib/libc.so
#1 0xa81211b4 in android::Looper::pollInner () from D:EclipseTestWorkspaceCallbackJava/lib/libutils.so
#2 0x00000000 in ?? ()
(gdb) c
Continuing.
Warning:
Cannot insert breakpoint 1.
Error accessing memory address 0x1a64: Input/output error.
(gdb)
所以从最后一个错误我所理解的是它考虑的绝对地址0x1a64。它不考虑相对地址(运行时地址)，所以不能击中断点。而且它在epoll_wait()上卡住了，没有继续移动。
有谁能帮我一下，我该怎么做呢?
谢谢,问候,
SSuman185
您可以尝试在Eclipse中使用DS-5 CE插件进行调试。你可以在这里找到如何安装和设置它的教程http://forums.arm.com/index.php?/topic/15575-arm-ds-5-tutorial-for-android/(上一篇文章是如何使它在SGS2上工作)。
我知道这不是你问题的确切答案，但如果你需要在SGS2上调试NDK，你可能想尝试一下，它也适用于Eclipse，而不是命令行gdb(但谁能更喜欢命令行调试而不是在IDE中调试??)
p。DS-5 CE是我在SGS2中使用的第一个NDK调试工具(它并不完美——可能是因为SGS2中的bug/限制——但至少可以工作)。