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/*******************************************************************************
* Copyright (c) 2011 Wind River Systems, Inc. and others.
* All rights reserved. This program and the accompanying materials
* are made available under the terms of the Eclipse Public License v1.0
* which accompanies this distribution, and is available at
* http://www.eclipse.org/legal/epl-v10.html
*
* Contributors:
* Wind River Systems - initial API and implementation
*******************************************************************************/
package org.eclipse.tm.internal.tcf.debug.ui.commands;
import java.util.Map;
import org.eclipse.core.runtime.IStatus;
import org.eclipse.core.runtime.Status;
import org.eclipse.debug.core.commands.IDebugCommandRequest;
import org.eclipse.debug.core.commands.IDropToFrameHandler;
import org.eclipse.debug.core.commands.IEnabledStateRequest;
import org.eclipse.tm.internal.tcf.debug.actions.TCFActionStepOut;
import org.eclipse.tm.internal.tcf.debug.model.TCFContextState;
import org.eclipse.tm.internal.tcf.debug.ui.Activator;
import org.eclipse.tm.internal.tcf.debug.ui.model.TCFModel;
import org.eclipse.tm.internal.tcf.debug.ui.model.TCFNode;
import org.eclipse.tm.internal.tcf.debug.ui.model.TCFNodeExecContext;
import org.eclipse.tm.internal.tcf.debug.ui.model.TCFNodeStackFrame;
import org.eclipse.tm.internal.tcf.debug.ui.model.TCFRunnable;
import org.eclipse.tm.tcf.protocol.IChannel;
import org.eclipse.tm.tcf.services.IBreakpoints;
import org.eclipse.tm.tcf.services.IRunControl;
import org.eclipse.tm.tcf.services.IRunControl.RunControlContext;
import org.eclipse.tm.tcf.services.IStackTrace.StackTraceContext;
import org.eclipse.tm.tcf.util.TCFDataCache;
/**
* Drop-to-frame command handler for TCF.
*/
public class DropToFrameCommand implements IDropToFrameHandler {
private static class StepStateMachine extends TCFActionStepOut {
private final IDebugCommandRequest monitor;
private final Runnable done;
private final TCFNodeExecContext node;
private final TCFNodeStackFrame frame;
StepStateMachine(TCFModel model, IDebugCommandRequest monitor,
IRunControl.RunControlContext ctx, TCFNodeStackFrame frame, Runnable done) {
super(model.getLaunch(), ctx, false);
this.monitor = monitor;
this.done = done;
this.frame = frame;
this.node = (TCFNodeExecContext)frame.getParent();
}
@Override
protected TCFDataCache<TCFContextState> getContextState() {
return node.getState();
}
@Override
protected TCFDataCache<StackTraceContext> getStackFrame() {
return frame.getStackTraceContext();
}
@Override
protected int getStackFrameIndex() {
return frame.getFrameNo();
}
@Override
protected TCFDataCache<?> getStackTrace() {
return node.getStackTrace();
}
protected void exit(Throwable error) {
exit(error, "Drop To Frame");
}
@Override
protected void exit(Throwable error, String reason) {
if (exited) return;
super.exit(error, reason);
if (error != null && node.getChannel().getState() == IChannel.STATE_OPEN) {
monitor.setStatus(new Status(IStatus.ERROR,
Activator.PLUGIN_ID, 0, "Cannot drop to frame: " + error.getLocalizedMessage(), error));
}
if (aborted) {
monitor.setStatus(Status.CANCEL_STATUS);
}
done.run();
}
}
private final TCFModel model;
public DropToFrameCommand(TCFModel tcfModel) {
model = tcfModel;
}
public void canExecute(final IEnabledStateRequest request) {
final Object[] elements = request.getElements();
if (elements.length != 1 || !(elements[0] instanceof TCFNodeStackFrame)) {
request.setEnabled(false);
request.done();
return;
}
final TCFNodeStackFrame frameNode = (TCFNodeStackFrame) elements[0];
new TCFRunnable(request) {
public void run() {
if (frameNode.getFrameNo() < 1) {
request.setEnabled(false);
done();
return;
}
TCFNodeExecContext exeNode = (TCFNodeExecContext) frameNode.getParent();
TCFDataCache<IRunControl.RunControlContext> ctx_cache = exeNode.getRunContext();
if (!ctx_cache.validate(this)) {
return;
}
IRunControl.RunControlContext ctx = ctx_cache.getData();
if (!canStepOut(ctx)) {
request.setEnabled(false);
done();
return;
}
int action_cnt = model.getLaunch().getContextActionsCount(ctx.getID());
if (action_cnt > 0 || !canStepOut(ctx)) {
request.setEnabled(false);
done();
return;
}
TCFDataCache<TCFContextState> state_cache = exeNode.getState();
if (!state_cache.validate(this)) {
return;
}
TCFContextState state_data = state_cache.getData();
request.setEnabled(state_data != null && state_data.is_suspended);
done();
}
private boolean canStepOut(RunControlContext ctx) {
if (ctx == null) return false;
if (ctx.canResume(IRunControl.RM_STEP_OUT)) return true;
if (!ctx.hasState()) return false;
if (ctx.canResume(IRunControl.RM_RESUME) && model.getLaunch().getService(IBreakpoints.class) != null) return true;
return false;
}
};
}
public boolean execute(final IDebugCommandRequest request) {
final Object[] elements = request.getElements();
if (elements.length != 1 || !(elements[0] instanceof TCFNodeStackFrame)) {
request.setStatus(Status.CANCEL_STATUS);
request.done();
return false;
}
final TCFNodeStackFrame frameNode = (TCFNodeStackFrame) elements[0];
new TCFRunnable(request) {
public void run() {
int frameNo = frameNode.getFrameNo();
if (frameNo < 1) {
request.setStatus(Status.CANCEL_STATUS);
done();
return;
}
TCFNodeExecContext exeNode = (TCFNodeExecContext) frameNode.getParent();
TCFDataCache<IRunControl.RunControlContext> ctx_cache = exeNode.getRunContext();
if (!ctx_cache.validate(this)) return;
TCFDataCache<TCFContextState> state_cache = exeNode.getState();
if (!state_cache.validate(this)) return;
TCFContextState state_data = state_cache.getData();
if (state_data == null || !state_data.is_suspended) {
request.setStatus(Status.CANCEL_STATUS);
done();
}
if (!exeNode.getStackTrace().validate(this)) return;
Map<String, TCFNode> stack = exeNode.getStackTrace().getData();
for (TCFNode node : stack.values()) {
TCFNodeStackFrame frame_to_step_out = (TCFNodeStackFrame) node;
if (frame_to_step_out.getFrameNo() == frameNo - 1) {
new StepStateMachine(model, request, ctx_cache.getData(), frame_to_step_out, new Runnable() {
public void run() {
request.done();
}
});
return;
}
}
request.setStatus(Status.CANCEL_STATUS);
done();
}
};
return false;
}
}
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