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package org.eclipse.tm.internal.tcf.debug.actions;
import java.math.BigInteger;
import java.util.HashMap;
import java.util.Map;
import org.eclipse.tm.internal.tcf.debug.model.TCFContextState;
import org.eclipse.tm.internal.tcf.debug.model.TCFLaunch;
import org.eclipse.tm.tcf.protocol.IToken;
import org.eclipse.tm.tcf.services.IBreakpoints;
import org.eclipse.tm.tcf.services.IRunControl;
import org.eclipse.tm.tcf.services.IStackTrace;
import org.eclipse.tm.tcf.services.IRunControl.RunControlContext;
import org.eclipse.tm.tcf.util.TCFDataCache;
public abstract class TCFActionStepOut extends TCFAction implements IRunControl.RunControlListener {
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) {
super(launch, ctx.getID());
this.ctx = ctx;
}
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 (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) {
exit(new Exception("Context is not suspended"));
return;
}
if (ctx.canResume(IRunControl.RM_STEP_OUT)) {
if (step_cnt > 0) {
exit(null);
return;
}
ctx.resume(IRunControl.RM_STEP_OUT, 1, new IRunControl.DoneCommand() {
public void doneCommand(IToken token, Exception error) {
if (error != null) exit(error);
}
});
step_cnt++;
return;
}
TCFDataCache<?> stack_trace = getStackTrace();
if (!stack_trace.validate(this)) return;
if (getStackFrameIndex() < 0) {
// Stepped out of selected function
exit(null);
}
else if (bps != null && ctx.canResume(IRunControl.RM_RESUME)) {
if (bp == null) {
TCFDataCache<IStackTrace.StackTraceContext> frame = getStackFrame();
if (!frame.validate(this)) return;
Number addr = frame.getData().getReturnAddress();
if (addr == null) {
exit(new Exception("Unknown stack frame return address"));
return;
}
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(IRunControl.RM_RESUME, 1, new IRunControl.DoneCommand() {
public void doneCommand(IToken token, Exception error) {
if (error != null) exit(error);
}
});
}
else {
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;
done(reason);
}
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;
if (isMyBreakpoint(pc, reason)) {
exit(null);
}
else {
exit(null, reason);
}
}
private boolean isMyBreakpoint(String pc, String reason) {
if (bp == null) return false;
if (pc == null) return false;
if (!IRunControl.REASON_BREAKPOINT.equals(reason)) return false;
BigInteger x = new BigInteger(pc);
BigInteger y = new BigInteger((String)bp.get(IBreakpoints.PROP_LOCATION));
return x.equals(y);
}
}
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