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/*******************************************************************************
* Copyright (c) 2016 Freescale Semiconductor and others.
*
* This program and the accompanying materials
* are made available under the terms of the Eclipse Public License 2.0
* which accompanies this distribution, and is available at
* https://www.eclipse.org/legal/epl-2.0/
*
* SPDX-License-Identifier: EPL-2.0
*
* Contributors:
* Teodor Madan (Freescale Semiconductor) - initial API and implementation
*******************************************************************************/
package org.eclipse.cdt.dsf.gdb.internal.ui.osview;
import java.text.MessageFormat;
import java.util.ArrayList;
import java.util.LinkedHashSet;
import java.util.List;
import java.util.Set;
import org.eclipse.cdt.dsf.concurrent.DataRequestMonitor;
import org.eclipse.cdt.dsf.concurrent.Query;
import org.eclipse.cdt.dsf.concurrent.RequestMonitor;
import org.eclipse.cdt.dsf.concurrent.Sequence;
import org.eclipse.cdt.dsf.datamodel.IDMContext;
import org.eclipse.cdt.dsf.debug.service.IProcesses;
import org.eclipse.cdt.dsf.debug.service.IProcesses.IProcessDMContext;
import org.eclipse.cdt.dsf.debug.service.command.ICommandControlService;
import org.eclipse.cdt.dsf.debug.service.command.ICommandControlService.ICommandControlDMContext;
import org.eclipse.cdt.dsf.gdb.internal.ui.GdbUIPlugin;
import org.eclipse.cdt.dsf.gdb.service.IGDBHardwareAndOS2.IResourcesInformation;
import org.eclipse.cdt.dsf.gdb.service.IGDBProcesses;
import org.eclipse.cdt.dsf.service.DsfServicesTracker;
import org.eclipse.cdt.dsf.service.DsfSession;
import org.eclipse.core.commands.AbstractHandler;
import org.eclipse.core.commands.ExecutionEvent;
import org.eclipse.core.commands.ExecutionException;
import org.eclipse.core.commands.IHandler;
import org.eclipse.core.expressions.IEvaluationContext;
import org.eclipse.core.runtime.CoreException;
import org.eclipse.core.runtime.ICoreRunnable;
import org.eclipse.core.runtime.IProgressMonitor;
import org.eclipse.core.runtime.IStatus;
import org.eclipse.core.runtime.Status;
import org.eclipse.core.runtime.jobs.Job;
import org.eclipse.debug.core.DebugPlugin;
import org.eclipse.debug.core.IStatusHandler;
import org.eclipse.jface.viewers.ISelection;
import org.eclipse.jface.viewers.IStructuredSelection;
import org.eclipse.ui.ISources;
import org.eclipse.ui.IWorkbenchPart;
import org.eclipse.ui.handlers.HandlerUtil;
import org.osgi.framework.BundleContext;
/**
*
*/
public class AttachProcessHandler extends AbstractHandler implements IHandler {
private static final String PROCESSES_CLASS = "processes"; //$NON-NLS-1$
private static final String THREADS_CLASS = "threads"; //$NON-NLS-1$
@Override
public void setEnabled(Object evaluationContext) {
boolean state = false;
if (evaluationContext instanceof IEvaluationContext) {
Object p = ((IEvaluationContext) evaluationContext).getVariable(ISources.ACTIVE_PART_NAME);
Object s = ((IEvaluationContext) evaluationContext).getVariable(ISources.ACTIVE_CURRENT_SELECTION_NAME);
if (p instanceof OSResourcesView && s instanceof IStructuredSelection) {
IStructuredSelection sel2 = (IStructuredSelection) s;
if (!sel2.isEmpty() && sel2.getFirstElement() instanceof IResourcesInformation) {
OSResourcesView rview = (OSResourcesView) p;
// check that processes class resources is selected.
ICommandControlDMContext sessionContext = rview.getSessionContext();
if (sessionContext != null && (PROCESSES_CLASS.equals(rview.getResourceClass())
|| THREADS_CLASS.equals(rview.getResourceClass()))) {
// check that attach is supported"
state = isAttachSupported(sessionContext);
}
}
}
}
setBaseEnabled(state);
}
private boolean isAttachSupported(final ICommandControlDMContext context) {
DsfSession session = DsfSession.getSession(context.getSessionId());
if (session == null) {
// can be null while terminating
return false;
}
Query<Boolean> canConnectQuery = new Query<Boolean>() {
@Override
public void execute(DataRequestMonitor<Boolean> rm) {
BundleContext c = GdbUIPlugin.getDefault().getBundle().getBundleContext();
DsfServicesTracker tracker = new DsfServicesTracker(c, context.getSessionId());
IProcesses procService = tracker.getService(IProcesses.class);
ICommandControlService commandControl = tracker.getService(ICommandControlService.class);
if (procService != null && commandControl != null) {
procService.isDebuggerAttachSupported(commandControl.getContext(), rm);
} else {
rm.done(false);
}
}
};
try {
session.getExecutor().execute(canConnectQuery);
return canConnectQuery.get();
} catch (InterruptedException | java.util.concurrent.ExecutionException e) {
// Can be thrown if the session is shutdown
}
return false;
}
@Override
public Object execute(ExecutionEvent event) throws ExecutionException {
ISelection selection = HandlerUtil.getCurrentSelection(event);
IWorkbenchPart part = HandlerUtil.getActivePart(event);
if (selection instanceof IStructuredSelection && part instanceof OSResourcesView) {
// get column to extract pid of the selected process/thread
int pidColumn = -1;
IResourcesInformation firstSelection = (IResourcesInformation) ((IStructuredSelection) selection)
.getFirstElement();
for (int i = 0; i < firstSelection.getColumnNames().length; i++) {
if ("pid".equalsIgnoreCase(firstSelection.getColumnNames()[i])) { //$NON-NLS-1$
pidColumn = i;
break;
}
}
if (pidColumn < 0) {
GdbUIPlugin.log(
new Status(IStatus.ERROR, GdbUIPlugin.PLUGIN_ID, "Missing 'pid' column to perform attach")); //$NON-NLS-1$
return null;
}
// Use a set of process. It is possible to have multiple entries
// with the same pid, e.g. threads with same process id
Set<String> process_ids = new LinkedHashSet<>();
for (Object sel : ((IStructuredSelection) selection).toList()) {
IResourcesInformation ri = (IResourcesInformation) sel;
if (pidColumn >= 0) {
String pid = ri.getContent()[0][pidColumn];
try {
Integer.parseInt(pid); // test for integer value
process_ids.add(pid);
} catch (NumberFormatException e) {
GdbUIPlugin.log(new Status(IStatus.ERROR, GdbUIPlugin.PLUGIN_ID, "Non-integer pid " + pid, e)); //$NON-NLS-1$
}
}
}
final ICommandControlDMContext context = ((OSResourcesView) part).getSessionContext();
final List<Sequence.Step> attach_steps = new ArrayList<>(process_ids.size());
for (final String p : process_ids) {
attach_steps.add(new Sequence.Step() {
@Override
public void execute(RequestMonitor rm) {
attachToProcess(context, p, rm);
}
@Override
public String getTaskName() {
return MessageFormat.format(Messages.OSView_AttachTask, p);
}
});
}
if (!attach_steps.isEmpty()) {
Job.create(Messages.OSView_AttachJobName, new ICoreRunnable() {
@Override
public void run(IProgressMonitor monitor) throws CoreException {
DsfSession session = DsfSession.getSession(context.getSessionId());
Sequence sequence = new Sequence(session.getExecutor(), monitor, Messages.OSView_AttachJobName,
"") { //$NON-NLS-1$
@Override
public Step[] getSteps() {
return attach_steps.toArray(new Step[attach_steps.size()]);
}
};
session.getExecutor().execute(sequence);
try {
sequence.get();
} catch (InterruptedException | java.util.concurrent.ExecutionException e) {
// ignore here.
}
}
}).schedule();
}
}
return null;
}
private void attachToProcess(final ICommandControlDMContext context, final String pid, RequestMonitor rm) {
BundleContext c = GdbUIPlugin.getDefault().getBundle().getBundleContext();
DsfServicesTracker tracker = new DsfServicesTracker(c, context.getSessionId());
try {
IGDBProcesses procService = tracker.getService(IGDBProcesses.class);
if (procService != null) {
// attach directly without looking for the binary
// since GDB will figure it out by itself
// TODO: update with asking user for the binary for cases
// not covered by GDB (e.g. GDB version < 7.10)
IProcessDMContext procDmc = procService.createProcessContext(context, pid);
procService.attachDebuggerToProcess(procDmc, new DataRequestMonitor<IDMContext>(
DsfSession.getSession(context.getSessionId()).getExecutor(), rm) {
@Override
protected void handleErrorOrWarning() {
IStatus status = getStatus();
if (status != null && !status.isOK()) {
IStatusHandler statusHandler = DebugPlugin.getDefault().getStatusHandler(status);
if (statusHandler != null) {
try {
statusHandler.handleStatus(status, null);
} catch (CoreException ex) {
GdbUIPlugin.getDefault().getLog().log(ex.getStatus());
}
} else {
GdbUIPlugin.getDefault().getLog().log(status);
}
}
handleSuccess(); // mark as success even if fail.
}
});
} else {
rm.done();
GdbUIPlugin.log(new Throwable("Could not retreive process service for context" + context)); //$NON-NLS-1$
}
} finally {
tracker.dispose();
}
}
}
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