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DS-5 Android - Problem debugging on a device

iosif hamlatzis
Note: This was originally posted on 19th April 2012 at http://forums.arm.com

I've finally managed to make the emulator work and now can debug my game on it. Thank you.

As I don't have an actual android device, I've installed an experimental version of ICS on my HP TouchPad. It seams everything works all right. I can use the adb utility provided with the SDK to connect to the device with no problem. But I cannot debug from inside eclipse under windows on the actual device.

I created a second debug configuration for the device and selected my device in the Connection tab at the combo-box, but after a while I receive a message that eclipse cannot connect to the device. This is strange as I have no problem with the connection. Under a dos window using the adb command I can see I can connect, I even can shell into the device.
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  • Note: This was originally posted on 27th April 2012 at http://forums.arm.com

    Hi Hamlatzis,

    After reading your comments, I dare say that the problem is that gdbserver doesn't attach to your app properly, either because the native application has exited before DS-5 can attach gdbserver to it -then is when you see ("Failed to communicate with gdbserver....")- or because gdbserver has attached too early (in JVM).

    It is difficult to say, but my guess is that gdbserver tries to attach to your native library when this has finished.

    For the first case you might need to add a delay before launching the Java native libraries (or inside your native library). For the second , you can edit the var SLEEP (in run.py and run_nostart.py), in order to add a delay between launching the activity and attaching gdbserver.

    Once gdbserver is able to attach to the library loaded into memory you may be able to work with breakpoints and temporary breakpoints.

    If you still have problems with gdbserver, it may be helpful if you could provide us with your app's status when the debugger fails, (open a windows terminal and execute >adb shell ps).

    Albert.
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  • Note: This was originally posted on 27th April 2012 at http://forums.arm.com

    Hi Hamlatzis,

    After reading your comments, I dare say that the problem is that gdbserver doesn't attach to your app properly, either because the native application has exited before DS-5 can attach gdbserver to it -then is when you see ("Failed to communicate with gdbserver....")- or because gdbserver has attached too early (in JVM).

    It is difficult to say, but my guess is that gdbserver tries to attach to your native library when this has finished.

    For the first case you might need to add a delay before launching the Java native libraries (or inside your native library). For the second , you can edit the var SLEEP (in run.py and run_nostart.py), in order to add a delay between launching the activity and attaching gdbserver.

    Once gdbserver is able to attach to the library loaded into memory you may be able to work with breakpoints and temporary breakpoints.

    If you still have problems with gdbserver, it may be helpful if you could provide us with your app's status when the debugger fails, (open a windows terminal and execute >adb shell ps).

    Albert.
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