在设置gdb和eclipse以从Android应用程序调试共享库之后,无法访问地址0X1处的内存

Question

我有两个Android项目:一个是库,另一个是使用此库的常规应用程序.我的目标是从Android应用程序调试共享库.我按照这个指南:

http://mhandroid.wordpress.com/2011/01/23/using-eclipse-for-android-cc-debugging/

我评论了最后一行

##$GDBCLIENT -x `native_path $GDBSETUP`

但是以下一行

##cp -f $GDBSETUP_INIT $GDBSETUP

抱怨信息:

it cannot stat ./libs/armeabi-v7a/gdb.setup

所以我评论了它,因为我认为Eclipse会为我上传它.除此之外,我确保:

• 在Android.mk中我放了LOCAL_CFLAGS:= -Wall -g

• 我在应用程序的libs库中获取.so

• 我在应用程序中使debuggable为true

• 修改了gdb2.setup路径,以便使用solib-search-path ./libs/armeabi-v7a/引用.so,并使用目录引用源代码

在单步执行System.LoadLibrary指令后,我执行了ndk-build-eclipse并且没有产生错误,当我开始本地调试时,我得到了:

无法访问地址0x1处的内存

在Cygwin上我得到了:

从主机0.0.0.0远程调试

这是运行ndk-gdb-eclipse命令的输出:

$ ./ndk-gdb-eclipse --adb=/cygdrive/c/Utilities/adt-bundle-windows/adt-bundle-windows/sdk/platform-tools/adb --project=/cygdrive/c/Projects/IDSmart/IDSmartApp/IDSmart  --force --port=5039 --verbose
Android NDK installation path: /cygdrive/c/Utilities/android-ndk-r8c-windows/android-ndk-r8c/.
Using specific adb command: /cygdrive/c/Utilities/adt-bundle-windows/adt-bundle-windows/sdk/platform-tools/adb
ADB version found: Android Debug Bridge version 1.0.31
Using ADB flags:
Using specified project path: /cygdrive/c/Projects/IDSmart/IDSmartApp/IDSmart
Found package name: uk.co.idscan.idsmart
ABIs targetted by application: armeabi-v7a
Device API Level: 15
Device CPU ABIs: armeabi-v7a armeabi
Compatible device ABI: armeabi-v7a
Using gdb setup init: ./libs/armeabi-v7a/gdb.setup
Using toolchain prefix: /cygdrive/c/Utilities/android-ndk-r8c-windows/android-ndk-r8c/./toolchains/arm-linux-androideabi-4.6/prebuilt/windows/bin/arm-linux-androideabi-
Using app out directory: ./obj/local/armeabi-v7a
Found debuggable flag: true
Found device gdbserver: /data/data/uk.co.idscan.idsmart/lib/gdbserver
Found data directory: '/data/data/uk.co.idscan.idsmart'
Found running PID: 7922
7922
Killing existing debugging session
## COMMAND: adb_cmd shell kill -9 7864
/system/bin/sh: kill: 7864: Operation not permitted
Launched gdbserver succesfully.
Setup network redirection
## COMMAND: adb_cmd shell run-as uk.co.idscan.idsmart lib/gdbserver +debug-socket --attach 7922
## COMMAND: adb_cmd forward tcp:5039 localfilesystem:/data/data/uk.co.idscan.idsmart/debug-socket
Attached; pid = 7922
Listening on Unix socket debug-socket
## COMMAND: adb_cmd pull /system/bin/app_process obj/local/armeabi-v7a/app_process
1373 KB/s (9848 bytes in 0.007s)
Pulled app_process from device/emulator.
## COMMAND: adb_cmd pull /system/bin/linker obj/local/armeabi-v7a/linker
2147 KB/s (39592 bytes in 0.018s)
Pulled linker from device/emulator.
## COMMAND: adb_cmd pull /system/lib/libc.so obj/local/armeabi-v7a/libc.so
2576 KB/s (282316 bytes in 0.107s)
Pulled libc.so from device/emulator.

Answer 1

Cannot access memory at address 0x1

发布您的 gdb2.setup 文件，该文件与您在 eclipse 中使用的文件相同。

通常，这些无法访问内存是由于 solib-search-path 不正确。尝试在 gdb2.setup 文件中输入项目 lib 文件夹的绝对路径。例如我将其设置为：

set solib-search-path D:/android/android-ndk-r8d/samples/hello-jni/obj/local/armeabi

如果有帮助请告诉我。