| [cdt-core-dev] Problem cancelling a launch |
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Hi, I’m having some problems with process termination under
CDT that I hope someone can help with. This might be a candidate for a bugzilla, but I thought I’d ask here first. As part of our launch process for a remote hardware target,
we need to download the elf file to the board. This is accomplished by a shell script
which does some processing and then launches an executable to download to the
board. So we have a step in our
launch which runs the download script.
If the elf file is large, the download can take some time, so it would
be nice to be able to cancel the process.
Here’s a snippet of code from the launch configuration delegate
which should allow for cancelling: Process process = exec(runCommandArray, getEnvironmentProperty(config),
currentWorkingDir); IProcess downloadProcess = DebugPlugin.newProcess(launch, process, renderProcessLabel(getRunLabel())); int total_work = 0; while (!downloadProcess.isTerminated()) { if (monitor.isCanceled()) { if (downloadProcess.canTerminate()) downloadProcess.terminate(); return false; } if (total_work <= 90) monitor.worked(10); try { Thread.sleep(1000); } catch (InterruptedException e) {} } The runCommandArray consists of
the path for sh, then the name of the script and then
the arguments for the script. The
exec command ends up running the following line of code: ProcessFactory.getFactory().exec(cmdLine, envp, workingDirectory); When the script is run from the command line, it can be
cancelled successfully and it cleans up its child processes. However, when run from eclipse, the call
to terminate() hangs until the download program (which
was launched by the script) has finished.
From debugging, it looks as though the culprit is the call to: ((SpawnerInputStream)getErrorStream()).close(); in the destroy method
of the Spawner. Sorry for the lengthy description of the problem, but is
there some part of the cancel process that I’m missing, or is there some
kind of problem with the Spawner that means that it
doesn’t terminate processes properly? I’m running on Windows XP and the problem
seems to exist in CDT 1.2.1 and 2.0.
If a bugzilla would be more appropriate than a
discussion in this mailing list, feel free to let me know and I’ll submit
the problem there. Thanks in advance, James
Langley |