| /* |
| * 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.mmtk.plan.nogc; |
| |
| import org.mmtk.plan.*; |
| import org.mmtk.vm.VM; |
| |
| import org.vmmagic.pragma.*; |
| |
| /** |
| * This class implements <i>per-collector thread</i> behavior and state |
| * for the <i>NoGC</i> plan, which simply allocates (without ever collecting |
| * until the available space is exhausted.<p> |
| * |
| * Specifically, this class <i>would</i> define <i>NoGC</i> collection time semantics, |
| * however, since this plan never collects, this class consists only of stubs which |
| * may be useful as a template for implementing a basic collector. |
| * |
| * @see NoGC |
| * @see NoGCMutator |
| * @see CollectorContext |
| */ |
| @Uninterruptible |
| public class NoGCCollector extends CollectorContext { |
| |
| /************************************************************************ |
| * Instance fields |
| */ |
| private final NoGCTraceLocal trace = new NoGCTraceLocal(global().trace); |
| protected final TraceLocal currentTrace = trace; |
| |
| |
| /**************************************************************************** |
| * Collection |
| */ |
| |
| /** |
| * Perform a garbage collection |
| */ |
| @Override |
| public final void collect() { |
| VM.assertions.fail("GC Triggered in NoGC Plan. Is -X:gc:ignoreSystemGC=true ?"); |
| } |
| |
| /** Perform some concurrent garbage collection */ |
| @Override |
| public final void concurrentCollect() { |
| VM.assertions.fail("Concurrent GC Triggered in NoGC Plan."); |
| } |
| |
| /** |
| * Perform a per-collector collection phase. |
| * |
| * @param phaseId The collection phase to perform |
| * @param primary perform any single-threaded local activities. |
| */ |
| @Inline |
| @Override |
| public final void collectionPhase(short phaseId, boolean primary) { |
| VM.assertions.fail("GC Triggered in NoGC Plan."); |
| /* |
| if (phaseId == NoGC.PREPARE) { |
| } |
| |
| if (phaseId == NoGC.CLOSURE) { |
| } |
| |
| if (phaseId == NoGC.RELEASE) { |
| } |
| |
| super.collectionPhase(phaseId, primary); |
| */ |
| } |
| |
| /** |
| * Perform some concurrent collection work. |
| * |
| * @param phaseId The unique phase identifier |
| */ |
| @Override |
| public void concurrentCollectionPhase(short phaseId) { |
| VM.assertions.fail("GC Triggered in NoGC Plan."); |
| } |
| |
| |
| /**************************************************************************** |
| * Miscellaneous |
| */ |
| |
| /** @return The active global plan as a <code>NoGC</code> instance. */ |
| @Inline |
| private static NoGC global() { |
| return (NoGC) VM.activePlan.global(); |
| } |
| |
| /** @return The current trace instance. */ |
| @Override |
| public final TraceLocal getCurrentTrace() { |
| return currentTrace; |
| } |
| } |