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/*******************************************************************************
* Copyright (c) 2010 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.tcf.internal.debug.actions;
import java.math.BigInteger;
import java.util.Collection;
import java.util.HashMap;
import java.util.Map;
import org.eclipse.tcf.internal.debug.model.TCFContextState;
import org.eclipse.tcf.internal.debug.model.TCFLaunch;
import org.eclipse.tcf.protocol.IToken;
import org.eclipse.tcf.protocol.JSON;
import org.eclipse.tcf.protocol.Protocol;
import org.eclipse.tcf.services.IBreakpoints;
import org.eclipse.tcf.services.IRunControl;
import org.eclipse.tcf.services.IStackTrace;
import org.eclipse.tcf.services.IRunControl.RunControlContext;
import org.eclipse.tcf.util.TCFDataCache;
public abstract class TCFActionStepOut extends TCFAction implements IRunControl.RunControlListener {
private final boolean step_back;
private final IRunControl rc = launch.getService(IRunControl.class);
private final IBreakpoints bps = launch.getService(IBreakpoints.class);
private IRunControl.RunControlContext ctx;
private TCFDataCache<TCFContextState> state;
private int step_cnt;
private Map<String,Object> bp;
protected boolean exited;
public TCFActionStepOut(TCFLaunch launch, IRunControl.RunControlContext ctx, boolean step_back) {
super(launch, ctx.getID());
this.ctx = ctx;
this.step_back = step_back;
}
protected abstract TCFDataCache<TCFContextState> getContextState();
protected abstract TCFDataCache<?> getStackTrace();
protected abstract TCFDataCache<IStackTrace.StackTraceContext> getStackFrame();
protected abstract int getStackFrameIndex();
public void run() {
if (exited) return;
try {
runAction();
}
catch (Throwable x) {
exit(x);
}
}
private void runAction() {
if (aborted) {
exit(null);
return;
}
if (state == null) {
rc.addListener(this);
state = getContextState();
if (state == null) {
exit(new Exception("Invalid context ID"));
return;
}
}
if (!state.validate(this)) return;
if (state.getData() == null || !state.getData().is_suspended) {
Throwable error = state.getError();
if (error == null) error = new Exception("Context is not suspended");
exit(error);
return;
}
TCFDataCache<?> stack_trace = getStackTrace();
if (!stack_trace.validate(this)) return;
int frame_index = getStackFrameIndex();
if (step_cnt > 0) {
TCFContextState state_data = state.getData();
boolean ok = isMyBreakpoint(state_data) || IRunControl.REASON_STEP.equals(state_data.suspend_reason);
if (!ok) exit(null, state_data.suspend_reason);
else if (frame_index < 0) exit(null);
if (exited) return;
}
int mode = step_back ? IRunControl.RM_REVERSE_STEP_OUT : IRunControl.RM_STEP_OUT;
if (ctx.canResume(mode)) {
int cnt = 1;
if (ctx.canCount(mode)) cnt += frame_index;
ctx.resume(mode, cnt, new IRunControl.DoneCommand() {
public void doneCommand(IToken token, Exception error) {
if (error != null) exit(error);
}
});
step_cnt++;
return;
}
if (bps != null && ctx.canResume(step_back ? IRunControl.RM_REVERSE_RESUME : IRunControl.RM_RESUME)) {
if (bp == null) {
TCFDataCache<IStackTrace.StackTraceContext> frame = getStackFrame();
if (!frame.validate(this)) return;
Number addr = null;
if (frame.getData() != null) addr = frame.getData().getReturnAddress();
if (addr == null) {
exit(new Exception("Unknown stack frame return address"));
return;
}
if (step_back) {
BigInteger n = JSON.toBigInteger(addr);
addr = n.subtract(BigInteger.valueOf(1));
}
String id = "Step." + ctx.getID();
bp = new HashMap<String,Object>();
bp.put(IBreakpoints.PROP_ID, id);
bp.put(IBreakpoints.PROP_LOCATION, addr.toString());
bp.put(IBreakpoints.PROP_CONDITION, "$thread==\"" + ctx.getID() + "\"");
bp.put(IBreakpoints.PROP_ENABLED, Boolean.TRUE);
bps.add(bp, new IBreakpoints.DoneCommand() {
public void doneCommand(IToken token, Exception error) {
if (error != null) exit(error);
}
});
}
ctx.resume(step_back ? IRunControl.RM_REVERSE_RESUME : IRunControl.RM_RESUME, 1, new IRunControl.DoneCommand() {
public void doneCommand(IToken token, Exception error) {
if (error != null) exit(error);
}
});
step_cnt++;
return;
}
exit(new Exception("Step out is not supported"));
}
protected void exit(Throwable error) {
exit(error, "Step Out");
}
protected void exit(Throwable error, String reason) {
if (exited) return;
if (bp != null) {
bps.remove(new String[]{ (String)bp.get(IBreakpoints.PROP_ID) }, new IBreakpoints.DoneCommand() {
public void doneCommand(IToken token, Exception error) {
}
});
}
rc.removeListener(this);
exited = true;
if (error == null) setActionResult(getContextID(), reason);
else launch.removeContextActions(getContextID());
done();
}
public void containerResumed(String[] context_ids) {
}
public void containerSuspended(String context, String pc,
String reason, Map<String, Object> params,
String[] suspended_ids) {
for (String id : suspended_ids) {
if (!id.equals(context)) contextSuspended(id, null, null, null);
}
contextSuspended(context, pc, reason, params);
}
public void contextAdded(RunControlContext[] contexts) {
}
public void contextChanged(RunControlContext[] contexts) {
for (RunControlContext c : contexts) {
if (c.getID().equals(ctx.getID())) ctx = c;
}
}
public void contextException(String context, String msg) {
if (context.equals(ctx.getID())) exit(new Exception(msg));
}
public void contextRemoved(String[] context_ids) {
for (String context : context_ids) {
if (context.equals(ctx.getID())) exit(null);
}
}
public void contextResumed(String context) {
}
public void contextSuspended(String context, String pc, String reason, Map<String,Object> params) {
if (!context.equals(ctx.getID())) return;
Protocol.invokeLater(this);
}
private boolean isMyBreakpoint(TCFContextState state_data) {
if (bp == null) return false;
if (!IRunControl.REASON_BREAKPOINT.equals(state_data.suspend_reason)) return false;
if (state_data.suspend_params != null) {
Object ids = state_data.suspend_params.get(IRunControl.STATE_BREAKPOINT_IDS);
if (ids != null) {
@SuppressWarnings("unchecked")
Collection<String> c = (Collection<String>)ids;
if (c.contains(bp.get(IBreakpoints.PROP_ID))) return true;
}
}
if (state_data.suspend_pc == null) return false;
BigInteger x = new BigInteger(state_data.suspend_pc);
BigInteger y = new BigInteger((String)bp.get(IBreakpoints.PROP_LOCATION));
return x.equals(y);
}
}
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