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/*
* Copyright (C) 2012 The Android Open Source Project
*
* Licensed under the Eclipse Public License, Version 1.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.eclipse.org/org/documents/epl-v10.php
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package com.android.ide.eclipse.ndk.internal.launch;
import com.android.ddmlib.IDevice;
import com.android.ddmlib.IShellOutputReceiver;
import java.util.concurrent.CountDownLatch;
import java.util.concurrent.atomic.AtomicBoolean;
/**
* The {@link GdbServerTask} launches gdbserver on the given device and attaches it to
* provided pid.
*/
public class GdbServerTask implements Runnable {
private IDevice mDevice;
private String mRunAs;
private String mSocket;
private int mPid;
private CountDownLatch mAttachLatch;
private GdbServerOutputReceiver mOutputReceiver;
private Exception mLaunchException;
private AtomicBoolean mCancelled = new AtomicBoolean(false);
private AtomicBoolean mHasCompleted = new AtomicBoolean(false);
/**
* Construct a gdbserver task.
* @param device device to run gdbserver on
* @param runAsPackage name of the package in which gdbserver resides
* @param socketName name of the local socket on which the server will listen
* @param pid pid of task to attach to
* @param attachLatch latch to notify when gdbserver gets attached to the task
*/
public GdbServerTask(IDevice device, String runAsPackage, String socketName, int pid,
CountDownLatch attachLatch) {
mDevice = device;
mRunAs = runAsPackage;
mSocket = socketName;
mPid = pid;
mAttachLatch = attachLatch;
mOutputReceiver = new GdbServerOutputReceiver();
}
/**
* Runs gdbserver on the device and connects to the given task. If gdbserver manages to
* successfully attach itself to the process, then it counts down on its attach latch.
*/
@Override
public void run() {
// Launch gdbserver on the device.
String command = String.format("run-as %s lib/gdbserver +%s --attach %d",
mRunAs, mSocket, mPid);
try {
mDevice.executeShellCommand(command, mOutputReceiver, 0);
} catch (Exception e) {
mLaunchException = e;
}
}
/** Returns any exceptions that might have occurred while launching gdbserver. */
public Exception getLaunchException() {
return mLaunchException;
}
/** Cancel gdbserver if it is running. */
public void setCancelled() {
mCancelled.set(true);
}
public String getShellOutput() {
return mOutputReceiver.getOutput();
}
private class GdbServerOutputReceiver implements IShellOutputReceiver {
private StringBuffer mOutput = new StringBuffer(100);
@Override
public synchronized void addOutput(byte[] data, int offset, int length) {
mOutput.append(new String(data, offset, length));
// notify other threads that gdbserver has attached to the task
if (mOutput.toString().contains("Attached")) {
mAttachLatch.countDown();
}
}
@Override
public void flush() {
mHasCompleted.set(true);
}
@Override
public boolean isCancelled() {
return mCancelled.get();
}
public synchronized String getOutput() {
return mOutput.toString();
}
}
}
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