I’ve been trying to connect jdb to the android emulator for a little while, and have been met repeatedly with:
jdb -sourcepath ./src -attach localhost:8700 java.io.IOException: shmemBase_attach failed: The system cannot find the file specified at com.sun.tools.jdi.SharedMemoryTransportService.attach0(Native Method) at com.sun.tools.jdi.SharedMemoryTransportService.attach(SharedMemoryTransportService.java:90) at com.sun.tools.jdi.GenericAttachingConnector.attach(GenericAttachingConnector.java:98) at com.sun.tools.jdi.SharedMemoryAttachingConnector.attach(SharedMemoryAttachingConnector.java:45) at com.sun.tools.example.debug.tty.VMConnection.attachTarget(VMConnection.java:358) at com.sun.tools.example.debug.tty.VMConnection.open(VMConnection.java:168) at com.sun.tools.example.debug.tty.Env.init(Env.java:64) at com.sun.tools.example.debug.tty.TTY.main(TTY.java:1010) Fatal error: Unable to attach to target VM.
Not so great. What's the best way of getting round this? I'm running on Windows 7 64bit.
Currently this is working for me -- making a socket rather than a shared memory connection.
>jdb –sourcepath .\src -connect com.sun.jdi.SocketAttach:hostname=localhost,port=8700
Beforehand you need to do some setup -- for example, see this set of useful details on setting up a non-eclipse debugger. It includes a good tip for setting your initial breakpoint -- create or edit a jdb.ini file in your home directory, with content like:
stop at com.mine.of.package.some.AClassIn:14
and they'll get loaded and deferred until connection.
edit: forgot to reference Herong Yang's page.
Try quitting Android Studio.
I had a similar problem on the Mac due to the ADB daemon already running. Once you quit any running daemons, you should see output similar to the following:
$ adb -d jdwp
28462
1939
^C
$ adb -d forward tcp:7777 jdwp:1939
$ jdb -attach localhost:7777 -sourcepath ./src
Set uncaught java.lang.Throwable
Set deferred uncaught java.lang.Throwable
Initializing jdb ...
>
See my other answer to a similar question for more details and how to start/stop the daemon.
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