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Code Issues Wiki Activity

[291342] DSF session executor intermittently deadlocks during session termination

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This commit is contained in:
John Cortell 2009-10-05 13:23:09 +00:00
parent ed290e9aad
commit f0ad66391f
1 changed files with 30 additions and 5 deletions
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35
dsf-gdb/org.eclipse.cdt.dsf.gdb/src/org/eclipse/cdt/dsf/mi/service/command/MIInferiorProcess.java
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@ -21,6 +21,8 @@ import java.io.PipedOutputStream;
import java.util.concurrent.CancellationException;
import java.util.concurrent.ExecutionException;
import java.util.concurrent.RejectedExecutionException;
import java.util.concurrent.TimeUnit;
import java.util.concurrent.TimeoutException;
import org.eclipse.cdt.dsf.concurrent.ConfinedToDsfExecutor;
import org.eclipse.cdt.dsf.concurrent.DataRequestMonitor;
@ -238,9 +240,26 @@ public class MIInferiorProcess extends Process
return exitValue();
}
/**
* @see java.lang.Process#exitValue()
*/
/**
* Thrown by {@link MIInferiorProcess#exitValue()} when it is unable to
* determine the exit value.
*/
public static class ExitValueUnavailableException extends IllegalThreadStateException {
private static final long serialVersionUID = 1L;
public ExitValueUnavailableException(String s) {
super(s);
}
}
/**
* Will throw an {@link ExitValueUnavailableException} if the DSF session
* executor is unavailable (for more than 300ms). We do not wait
* indefinitely, as our caller may have a lock that the active
* Runnable/Callable is waiting for, and that could cause a deadlock.
*
* @see java.lang.Process#exitValue()
*/
@Override
public int exitValue() {
if (fExitCode != null) {
@ -280,13 +299,19 @@ public class MIInferiorProcess extends Process
}
};
fSession.getExecutor().execute(exitCodeQuery);
fExitCode = exitCodeQuery.get();
try {
// Don't wait indefinitely. See bugzilla 291342
fExitCode = exitCodeQuery.get(300, TimeUnit.MILLISECONDS);
} catch (TimeoutException e) {
exitCodeQuery.cancel(false);
throw new ExitValueUnavailableException("Timed out waiting for availability of DSF executor."); //$NON-NLS-1$
}
return fExitCode;
} catch (RejectedExecutionException e) {
} catch (InterruptedException e) {
} catch (CancellationException e) {
} catch (ExecutionException e) {
// Che
if (e.getCause() instanceof CoreException &&
((CoreException)e.getCause()).getStatus().getException() instanceof RuntimeException )
{