/*
* This file is part of the Jikes RVM project (http://jikesrvm.org).
*
* This file is licensed to You under the Eclipse Public License (EPL);
* You may not use this file except in compliance with the License. You
* may obtain a copy of the License at
*
* http://www.opensource.org/licenses/eclipse-1.0.php
*
* See the COPYRIGHT.txt file distributed with this work for information
* regarding copyright ownership.
*/
package org.jikesrvm.adaptive;
import org.jikesrvm.adaptive.controller.Controller;
import org.jikesrvm.classloader.RVMMethod;
import org.jikesrvm.compilers.common.CompiledMethod;
import org.jikesrvm.compilers.common.CompiledMethods;
import org.jikesrvm.scheduler.RVMThread;
import org.vmmagic.pragma.NoInline;
import org.vmmagic.pragma.Unpreemptible;
import org.vmmagic.unboxed.Offset;
/**
* Trigger an OSR from a running thread.
*/
public class OnStackReplacementTrigger {
/**
* Trigger an OSR from a running thread.
*/
@NoInline
@Unpreemptible
public static void trigger(int ypTakenInCMID, Offset tsFromFPoff, Offset ypTakenFPoff, int whereFrom) {
RVMThread thread = RVMThread.getCurrentThread();
CompiledMethod ypTakenInCM = CompiledMethods.getCompiledMethod(ypTakenInCMID);
RVMMethod ypTakenInMethod = ypTakenInCM.getMethod();
boolean isInBootImage = ypTakenInMethod.getDeclaringClass().isInBootImage();
if (isInBootImage) return;
OnStackReplacementEvent event = (OnStackReplacementEvent) thread.onStackReplacementEvent;
event.suspendedThread = thread;
event.whereFrom = whereFrom;
event.CMID = ypTakenInCMID;
event.tsFromFPoff = tsFromFPoff;
event.ypTakenFPoff = ypTakenFPoff;
thread.monitor().lockNoHandshake();
thread.requesting_osr = true;
thread.monitor().unlock();
Controller.osrOrganizer.activate();
// PNT: Assumes that OSR doesn't need access to our context regs
thread.monitor().lockNoHandshake();
while (!thread.osr_done) {
thread.monitor().waitWithHandshake();
}
thread.osr_done=false;
thread.monitor().unlock();
}
}