/*******************************************************************************
*
* Copyright (C) 2008 Fujitsu Services Ltd.
*
* Author: Nick Battle
*
* This file is part of VDMJ.
*
* VDMJ is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* VDMJ is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with VDMJ. If not, see <http://www.gnu.org/licenses/>.
*
******************************************************************************/
package org.overture.interpreter.runtime;
import org.overture.ast.intf.lex.ILexLocation;
import org.overture.config.Settings;
import org.overture.interpreter.commands.DebuggerReader;
import org.overture.interpreter.debug.BreakpointManager;
import org.overture.interpreter.scheduler.BasicSchedulableThread;
import org.overture.interpreter.scheduler.ISchedulableThread;
import org.overture.parser.lex.LexException;
import org.overture.parser.syntax.ParserException;
/**
* A breakpoint where execution must stop.
*/
public class Stoppoint extends Breakpoint
{
private static final long serialVersionUID = 1L;
public Stoppoint(ILexLocation location, int number, String trace)
throws ParserException, LexException
{
super(location, number, trace);
}
@Override
public void check(ILexLocation execl, Context ctxt)
{
// skips if breakpoint is disabled
if (!enabled)
{
return;
}
location.hit();
hits++;
try
{
boolean shouldBreak = parsed == null;
if (!shouldBreak)
{
try
{
// Clear thread state while evaluating the expression and set
// the state back after. Done to prevent the debugger from stopping
// in the expression
Context outctxt = ctxt.threadState.outctxt;
RootContext rootContext = ctxt.threadState.nextctxt;
ILexLocation stepline = ctxt.threadState.stepline;
ctxt.threadState.init();
ctxt.threadState.setAtomic(true);
shouldBreak = BreakpointManager.shouldStop(parsed, ctxt);
ctxt.threadState.setBreaks(stepline, rootContext, outctxt);
} catch (Exception e)
{
String message = e.getMessage();
if(message == null)
{
message = "breakpoint condition could not be evaluated";
}
println("Breakpoint [" + number + "]: " + message
+ " \"" + trace + "\"");
}
finally
{
ctxt.threadState.setAtomic(false);
}
}
if (shouldBreak)
{
ISchedulableThread th = BasicSchedulableThread.getThread(Thread.currentThread());
if (th != null)
{
th.suspendOthers();
}
if (Settings.usingDBGP)
{
ctxt.threadState.dbgp.stopped(ctxt, this);
} else
{
new DebuggerReader(Interpreter.getInstance(), this, ctxt).run();
}
}
} catch (DebuggerException e)
{
throw e;
}
}
@Override
public String toString()
{
if (number == 0)
{
return super.toString();
} else
{
return "break [" + number + "] "
+ (trace == null ? "" : "when \"" + trace + "\" ")
+ super.toString();
}
}
}