/*
* 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.compilers.common.CompiledMethod;
import org.jikesrvm.compilers.common.CompiledMethods;
import org.jikesrvm.runtime.Magic;
import org.jikesrvm.scheduler.RVMThread;
import org.vmmagic.pragma.Unpreemptible;
import org.vmmagic.unboxed.Address;
import org.vmmagic.unboxed.Offset;
/**
* Code invoked from Thread.yieldpoint for the purposes of OSR.
*/
@Unpreemptible
public class OSRListener {
public static boolean checkForOSRPromotion(int whereFrom, Address yieldpointServiceMethodFP) {
if (RVMThread.getCurrentThread().isSystemThread()) return false;
if (whereFrom != RVMThread.BACKEDGE) return false;
// See if we are at a loop backedge in an outdated baseline compiled method
Address fp = yieldpointServiceMethodFP;
fp = Magic.getCallerFramePointer(fp);
int ypTakenInCMID = Magic.getCompiledMethodID(fp);
CompiledMethod ypTakenInCM = CompiledMethods.getCompiledMethod(ypTakenInCMID);
if (ypTakenInCM.isOutdated() && ypTakenInCM.getCompilerType() == CompiledMethod.BASELINE) {
Address tsFromFP = yieldpointServiceMethodFP;
Address realFP = Magic.getCallerFramePointer(tsFromFP);
Address stackbeg = Magic.objectAsAddress(RVMThread.getCurrentThread().getStack());
Offset tsFromFPoff = tsFromFP.diff(stackbeg);
Offset realFPoff = realFP.diff(stackbeg);
OnStackReplacementTrigger.trigger(ypTakenInCMID, tsFromFPoff, realFPoff, whereFrom);
return true;
}
return false;
}
public static void handleOSRFromOpt(Address yieldpointServiceMethodFP) {
Address tsFromFP = yieldpointServiceMethodFP;
Address realFP = Magic.getCallerFramePointer(tsFromFP);
int ypTakenInCMID = Magic.getCompiledMethodID(realFP);
Address stackbeg = Magic.objectAsAddress(RVMThread.getCurrentThread().getStack());
Offset tsFromFPoff = tsFromFP.diff(stackbeg);
Offset realFPoff = realFP.diff(stackbeg);
OnStackReplacementTrigger.trigger(ypTakenInCMID, tsFromFPoff, realFPoff, RVMThread.OSROPT);
}
}