开发环境:
NDK:r7
SDK 和工具:r15
AVD:GB2.3.3，API 级别 10

我编写了一个测试应用程序，其中线程将在 native 中启动。我在线程中保留了一个断点。 (最初当我在 Galaxy S2 上尝试时出现错误，“此平台不支持线程调试”。所以我创建了一个 AVD 2.3.3 Level 10)。

在这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 ?? ()

我用谷歌搜索并找到了这个 Solution (Link Here).

我遵循那里的指导方针

$ 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() 中，没有继续前进。

D:\EclipseTestWorkspace\CallbackJava>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:\EclipseTestWorkspace\CallbackJava/lib/libc.so...(no debugging symbols found)...done.
Loaded symbols for D:\EclipseTestWorkspace\CallbackJava/lib/libc.so
----- So many similar errors -----
Loaded symbols for D:\EclipseTestWorkspace\CallbackJava/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:\EclipseTestWorkspace\CallbackJava/./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:\EclipseTestWorkspace\CallbackJava/./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:\EclipseTestWorkspace\CallbackJava/lib/libc.so
#1  0xa81211b4 in android::Looper::pollInner () from D:\EclipseTestWorkspace\CallbackJava/lib/libutils.so
#2  0x00000000 in ?? ()
(gdb) where
#0  0xafd0c51c in epoll_wait () from D:\EclipseTestWorkspace\CallbackJava/lib/libc.so
#1  0xa81211b4 in android::Looper::pollInner () from D:\EclipseTestWorkspace\CallbackJava/lib/libutils.so
#2  0x00000000 in ?? ()
(gdb) c
Continuing.
Warning:
Cannot insert breakpoint 1.
Error accessing memory address 0x1a64: Input/output error.

(gdb)

我想把重点放在主要部分

(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:\EclipseTestWorkspace\CallbackJava/./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:\EclipseTestWorkspace\CallbackJava/./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:\EclipseTestWorkspace\CallbackJava/lib/libc.so
#1  0xa81211b4 in android::Looper::pollInner () from D:\EclipseTestWorkspace\CallbackJava/lib/libutils.so
#2  0x00000000 in ?? ()
(gdb) where
#0  0xafd0c51c in epoll_wait () from D:\EclipseTestWorkspace\CallbackJava/lib/libc.so
#1  0xa81211b4 in android::Looper::pollInner () from D:\EclipseTestWorkspace\CallbackJava/lib/libutils.so
#2  0x00000000 in ?? ()
(gdb) c
Continuing.
Warning:
Cannot insert breakpoint 1.
Error accessing memory address 0x1a64: Input/output error.

(gdb)

所以从上一个错误我的理解是它考虑了绝对地址 0x1a64。它没有考虑相对地址(运行时地址)，所以不能命中断点。并且它还卡在 epoll_wait () 上，没有进一步移动。

请问有谁能帮我做进一步的工作吗？

感谢和问候，
S苏曼185

最佳答案

您可以尝试使用 DS-5 CE 插件在 Eclipse 中进行调试。您可以在此处找到有关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/ (最后一篇文章是如何让它在 SGS2 上工作)。

我知道这不是您问题的确切答案，但如果您需要在 SGS2 上进行 NDK 调试，您可能想尝试一下，它也适用于 Eclipse，而不是命令行 gdb(但谁会更喜欢命令行调试而不是在 IDE 中调试？？)

附言。 DS-5 CE 是第一个适用于 SGS2 的 NDK 调试工具(它并不完美 - 可能是因为 SGS2 中的错误/限制 - 但至少有效)。

关于android - 无法在 Android 的 ndk-gdb 中达到断点，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/8342749/