debugging a jni library

[bleubleu]

Hello,

I am trying to debug a application that uses jni, but I encounter problems for 'complex' projects.

For my test, I begun with the sample gl2jni included in the ndk.

It works well, and I can attach gdb to it. When running ndk-gdb:

Found device gdbserver: /data/data/com.android.gl2jni/lib/gdbserver

But, if i modify this project to a library, and I create another project application that will use this library,

everything works fine (compilation, execution),

but if i try to execute ndk-gdb in the library directory, i get this:

ERROR: Non-debuggable application installed on the target device.

Does anybody can help ?

[Baodong Chen]

have you tried to set debugable=true in yor AndroidManifest.xml?

>
> Does anybody can help ?
>

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[bleubleu]

yes, on both projects.

On Tuesday, July 31, 2012 2:57:59 PM UTC+2, Baodong Chen wrote:

On Tue, Jul 31, 2012 at 8:28 PM, bleubleu  wrote:
> Hello,
>
> I am trying to debug a application that uses jni, but I encounter problems
> for 'complex' projects.
>
> For my test, I begun with the sample gl2jni included in the ndk.
> It works well, and I can attach gdb to it. When running ndk-gdb:
> Found device gdbserver: /data/data/com.android.gl2jni/lib/gdbserver
>
> But, if i modify this project to a library, and I create another project
> application that will use this library,
> everything works fine (compilation, execution),
> but if i try to execute ndk-gdb in the library directory, i get this:
> ERROR: Non-debuggable application installed on the target device.
have you tried to set debugable=true in yor AndroidManifest.xml?

>
> Does anybody can help ?
>
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[Fabien R]

On 31/07/2012 15:02, bleubleu wrote:
> yes, on both projects.
>
> On Tuesday, July 31, 2012 2:57:59 PM UTC+2, Baodong Chen wrote:
>
>> On Tue, Jul 31, 2012 at 8:28 PM, bleubleu wrote:
>>
>>> Hello,
>>>
>>> I am trying to debug a application that uses jni, but I encounter
>>>
>> problems
>>
>>> for 'complex' projects.
>>>
>>> For my test, I begun with the sample gl2jni included in the ndk.
>>> It works well, and I can attach gdb to it. When running ndk-gdb:
>>> Found device gdbserver: /data/data/com.android.gl2jni/lib/gdbserver

It's obvious for you but what is your environment: OS, adt, sdk,ndk ?

>>>
>>>
>>> But, if i modify this project to a library, and I create another project
>>> application that will use this library,
>>> everything works fine (compilation, execution),
>>> but if i try to execute ndk-gdb in the library directory, i get this:
>>> ERROR: Non-debuggable application installed on the target device.
>>>

what command line did you use ?
Do you use eclipse ?

>> have you tried to set debugable=true in yor AndroidManifest.xml?
>>

Maybe your problem is related to this:
http://stackoverflow.com/questions/8266852/not-able-to-attach-the-ndk-gdb-to-the-android-application

[bleubleu]

Ok, I found the problem.

It is impossible to debug a library project.

If I put my "main" in the java library project that contains the jni code,

I am able to debug.

[Cyril CHAMPIER]

Hi,

My problems comes from my solution hierarchy:

I launched java project A,

that depends on java project B,

that includes a c jni C.

Debug mode works only for a java project that directly includes a c jni.

If you are already in that mode, I cannot help you :(

On Wednesday, August 29, 2012 12:46:20 PM UTC+2, Yotam Michael wrote:

Hello,

I am facing the same problem
ndk-build NDK_LOG=1 -B give:
...
Gdbserver      : [arm-linux-androideabi-4.6] libs/armeabi/gdbserver
Gdbsetup       : libs/armeabi/gdb.setup

ndk-gdb   --verbose give:
Found debuggable flag: true

ERROR: Non-debuggable application installed on the target device.

       Please re-install the debuggable version!

I do not understand your solution, what exactly did you do?
My Project has no library projects attached to it.
Should I move the jni folder?
Should the C code be inserted directly into the java file?

Help would be very much appreciated.
Yotam

[Swetha Setty]

hi,

 

Have you set the the debugging mode for ndk( NDK_DEBUG=1) in your ndk build configurations?

Either you can do that or while building bdk, you could use ndk-build NDK_DEBUG=1

 

-Swetha

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[ost12666]

You can also put just the Application.mk in the java project to be able to debug.

Maybe it worth also trying the new NDK plugin and see if something improved:

http://tools.android.com/recent/usingthendkplugin

On Wednesday, August 1, 2012 12:03:04 PM UTC+3, Cyril CHAMPIER wrote: