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jdb test
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gistfile1.txt
Notes:
devel/libs/android/jdk is the 32-bit JDK
devel/libs/android/jdk64 is 64-bit.
I modified my local ndk-gdb script to do everything but run jdb / gdb;
instead, it justs prints the respective command lines. I get this:
----
$ ndk-gdb --start
/cygdrive/c/devel/libs/android/jdk/bin/jdb -connect com.sun.jdi.SocketAttach:hostname=localhost,port=65534
/cygdrive/c/devel/libs/android/ndk/toolchains/arm-linux-androideabi-4.6/prebuilt/windows-x86_64/bin/arm-linux-androideabi-gdb -x obj/local/armeabi-v7a/gdb.setup
----
At this point, I have the following forwarding setup:
----
$ adb forward --list
015DAA2E0D02A02A tcp:5039 localfilesystem:/data/data/com.radgametools.examandroid/debug-socket
015DAA2E0D02A02A tcp:65534 jdwp:2475
----
When I start jdb manually, I get this:
----
$ /cygdrive/c/devel/libs/android/jdk/bin/jdb -connect com.sun.jdi.SocketAttach:hostname=localhost,port=65534
Set uncaught java.lang.Throwable
Set deferred uncaught java.lang.Throwable
Initializing jdb ...
>
----
It seems to be successfully attached:
----
> threads
Group system:
(java.lang.Thread)0xc140512680 <6> Compiler cond. waiting
(java.lang.Thread)0xc140512510 <4> Signal Catcher cond. waiting
(java.lang.Thread)0xc140512468 <3> GC cond. waiting
(java.lang.Thread)0xc1405123b0 <2> HeapWorker cond. waiting
Group main:
(java.lang.Thread)0xc140022258 <1> main sleeping
(java.lang.Thread)0xc140517260 <8> Binder Thread #2 running
(java.lang.Thread)0xc1405165f8 <7> Binder Thread #1 running
> where all
<1> main:
Current thread isn't suspended.
<8> Binder Thread #2:
Current thread isn't suspended.
<7> Binder Thread #1:
Current thread isn't suspended.
<6> Compiler:
Current thread isn't suspended.
<4> Signal Catcher:
Current thread isn't suspended.
<3> GC:
Current thread isn't suspended.
<2> HeapWorker:
Current thread isn't suspended.
----
But the phone is still stuck on the "Waiting for Debugger" prompt.
UPDATE: If I do suspend the threads, I get the following stack traces:
----
> suspend
All threads suspended.
> where all
<1> main:
[1] java.lang.VMThread.sleep (native method)
[2] java.lang.Thread.sleep (Thread.java:1,213)
[3] java.lang.Thread.sleep (Thread.java:1,195)
[4] android.os.Debug.waitForDebugger (Debug.java:219)
[5] android.app.ActivityThread.handleBindApplication (ActivityThread.java:3,305)
[6] android.app.ActivityThread.access$2200 (ActivityThread.java:124)
[7] android.app.ActivityThread$H.handleMessage (ActivityThread.java:1,006)
[8] android.os.Handler.dispatchMessage (Handler.java:99)
[9] android.os.Looper.loop (Looper.java:130)
[10] android.app.ActivityThread.main (ActivityThread.java:3,806)
[11] java.lang.reflect.Method.invokeNative (native method)
[12] java.lang.reflect.Method.invoke (Method.java:507)
[13] com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run (ZygoteInit.java:839)
[14] com.android.internal.os.ZygoteInit.main (ZygoteInit.java:597)
[15] dalvik.system.NativeStart.main (native method)
<8> Binder Thread #2:
[1] dalvik.system.NativeStart.run (native method)
<7> Binder Thread #1:
[1] dalvik.system.NativeStart.run (native method)
<6> Compiler:
[1] dalvik.system.NativeStart.run (native method)
<4> Signal Catcher:
[1] dalvik.system.NativeStart.run (native method)
<3> GC:
[1] dalvik.system.NativeStart.run (native method)
<2> HeapWorker:
[1] dalvik.system.NativeStart.run (native method)
----
@webbju
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webbju commented Sep 24, 2013

Try this:

  • Go to your phone/device's 'Developer Options' page.
  • If you don't have one, go to 'About Phone' and press 'Build Number' 5 times.
  • In Developer Options there's an entry for 'Select debug app' - set this to one of your testbeds (hellojni for example).
  • Tick the 'wait for debugger' option.
  • Load SDK\tools\monitor.bat (and have the logcat output for your device visible)
  • Start the selected debug app.
  • You should see something like:

09-24 20:15:26.378: W/ActivityThread(4799): Application com.example.nativemedia is waiting for the debugger on port 8100...

  • Try that port.
  • Pray.

@rygorous
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Author

I get:

Fabian@Fabian-PC ~
$ adb logcat -c

Fabian@Fabian-PC ~
$ adb logcat
--------- beginning of /dev/log/system
I/ActivityManager(  437): START u0 {act=android.intent.action.MAIN cat=[android.intent.category.LAUNCHER] flg=0x10200000 cmp=com.radgametools.examandroid/android.app.NativeActivity bnds=[173,34][290,151]} from pid 3032
--------- beginning of /dev/log/main
D/dalvikvm(  437): GC_FOR_ALLOC freed 359K, 27% free 16324K/22336K, paused 77ms, total 78ms
D/dalvikvm(  437): GC_FOR_ALLOC freed 314K, 28% free 16256K/22336K, paused 53ms, total 53ms
D/dalvikvm( 6188): Late-enabling CheckJNI
I/ActivityManager(  437): Start proc com.radgametools.examandroid for activity com.radgametools.examandroid/android.app.NativeActivity: pid=6188 uid=10069 gids={50069, 1028}
I/dalvikvm( 6188): Turning on JNI app bug workarounds for target SDK version 9...
W/ActivityThread( 6188): Application com.radgametools.examandroid is waiting for the debugger on port 8100...
I/System.out( 6188): Sending WAIT chunk


W/ActivityManager(  437): Launch timeout has expired, giving up wake lock!
W/ActivityManager(  437): Activity idle timeout for ActivityRecord{4216f2e8 u0 com.radgametools.examandroid/android.app.NativeActivity}
W/ActivityManager(  437):   Force finishing activity com.radgametools.examandroid/android.app.NativeActivity
I/WindowManager(  437): Screenshot max retries 4 of Token{421e90e8 ActivityRecord{4216f2e8 u0 com.radgametools.examandroid/android.app.NativeActivity}} appWin=Window{42644ad8 u0 Starting com.radgametools.examandroid} drawState=4
W/WindowManager(  437): Screenshot failure taking screenshot for (1280x800) to layer 21020
I/ActivityManager(  437): Killing ProcessRecord{4261b998 6188:com.radgametools.examandroid/u0a10069}: user's request
I/ActivityManager(  437): Process com.radgametools.examandroid (pid 6188) has died.
W/InputMethodManagerService(  437): Window already focused, ignoring focus gain of: com.android.internal.view.IInputMethodClient$Stub$Proxy@426e0420 attribute=null, token = android.os.BinderProxy@425b68f8

In the middle (where I inserted the blank lines), I did this in another terminal:

Fabian@Fabian-PC /cygdrive/c/devel/projects/bink/src/examples/android
$ /cygdrive/c/devel/libs/android/jdk/bin/jdb -connect com.sun.jdi.SocketAttach:hostname=localhost,port=8100
java.net.ConnectException: Connection refused: connect
        at java.net.DualStackPlainSocketImpl.connect0(Native Method)
        at java.net.DualStackPlainSocketImpl.socketConnect(DualStackPlainSocketImpl.java:79)
        at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:339)
        at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:200)
        at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:182)
        at java.net.PlainSocketImpl.connect(PlainSocketImpl.java:172)
        at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)
        at java.net.Socket.connect(Socket.java:579)
        at com.sun.tools.jdi.SocketTransportService.attach(SocketTransportService.java:222)
        at com.sun.tools.jdi.GenericAttachingConnector.attach(GenericAttachingConnector.java:116)
        at com.sun.tools.jdi.SocketAttachingConnector.attach(SocketAttachingConnector.java:90)
        at com.sun.tools.example.debug.tty.VMConnection.attachTarget(VMConnection.java:519)
        at com.sun.tools.example.debug.tty.VMConnection.open(VMConnection.java:328)
        at com.sun.tools.example.debug.tty.Env.init(Env.java:63)
        at com.sun.tools.example.debug.tty.TTY.main(TTY.java:1066)

Fatal error:
Unable to attach to target VM.

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