001 /*
002 * This file is part of the Jikes RVM project (http://jikesrvm.org).
003 *
004 * This file is licensed to You under the Eclipse Public License (EPL);
005 * You may not use this file except in compliance with the License. You
006 * may obtain a copy of the License at
007 *
008 * http://www.opensource.org/licenses/eclipse-1.0.php
009 *
010 * See the COPYRIGHT.txt file distributed with this work for information
011 * regarding copyright ownership.
012 */
013 package org.jikesrvm.adaptive;
014
015 import org.jikesrvm.adaptive.controller.Controller;
016 import org.jikesrvm.adaptive.controller.ControllerInputEvent;
017 import org.jikesrvm.adaptive.controller.ControllerMemory;
018 import org.jikesrvm.adaptive.controller.ControllerPlan;
019 import org.jikesrvm.adaptive.util.AOSLogging;
020 import org.jikesrvm.classloader.NormalMethod;
021 import org.jikesrvm.compilers.common.CompiledMethod;
022 import org.jikesrvm.compilers.common.CompiledMethods;
023 import org.jikesrvm.compilers.common.RuntimeCompiler;
024 import org.jikesrvm.compilers.opt.OptOptions;
025 import org.jikesrvm.compilers.opt.driver.CompilationPlan;
026 import org.jikesrvm.compilers.opt.driver.OptimizationPlanElement;
027 import org.jikesrvm.scheduler.RVMThread;
028 import org.vmmagic.unboxed.Offset;
029
030 /**
031 * Event generated by a thread aware of on-stack-replacement request.
032 * The event is feed to the controller with suspended thread, and hot
033 * method id. Since it does not need to go through analytic model, it does
034 * not extend the HotMethodEvent.
035 */
036 public final class OnStackReplacementEvent implements ControllerInputEvent {
037
038 /** the suspended thread. */
039 public RVMThread suspendedThread;
040
041 /** remember where it comes from */
042 public int whereFrom;
043
044 /** the compiled method id */
045 public int CMID;
046
047 /** the threadSwithFrom fp offset */
048 public Offset tsFromFPoff;
049
050 /** the osr method's fp offset */
051 public Offset ypTakenFPoff;
052
053 /**
054 * This function will generate a controller plan and
055 * inserted in the recompilation queue.
056 */
057 @Override
058 public void process() {
059
060 CompiledMethod compiledMethod = CompiledMethods.getCompiledMethod(CMID);
061
062 NormalMethod todoMethod = (NormalMethod) compiledMethod.getMethod();
063
064 double priority;
065 OptOptions options;
066 OptimizationPlanElement[] optimizationPlan;
067
068 ControllerPlan oldPlan = ControllerMemory.findLatestPlan(todoMethod);
069
070 if (oldPlan != null) {
071 CompilationPlan oldCompPlan = oldPlan.getCompPlan();
072 priority = oldPlan.getPriority();
073 options = oldCompPlan.options;
074 optimizationPlan = oldCompPlan.optimizationPlan;
075 } else {
076 priority = 5.0;
077 options = (OptOptions) RuntimeCompiler.options;
078 optimizationPlan = (OptimizationPlanElement[]) RuntimeCompiler.optimizationPlan;
079 }
080
081 CompilationPlan compPlan = new CompilationPlan(todoMethod, optimizationPlan, null, options);
082
083 OnStackReplacementPlan plan =
084 new OnStackReplacementPlan(this.suspendedThread,
085 compPlan,
086 this.CMID,
087 this.whereFrom,
088 this.tsFromFPoff,
089 this.ypTakenFPoff,
090 priority);
091
092 Controller.compilationQueue.insert(priority, plan);
093
094 AOSLogging.logger.logOsrEvent("OSR inserts compilation plan successfully!");
095
096 // do not hold the reference anymore.
097 suspendedThread = null;
098 CMID = 0;
099 }
100 }