Mercurial > hg > graal-jvmci-8
comparison graal/com.oracle.jvmci.meta/src/com/oracle/jvmci/meta/SpeculationLog.java @ 21629:36cf15e3219e
Move HotSpotResolvedJavaMethod.getSpeculationLog to ResolvedJavaMethod
author | Gilles Duboscq <gilles.m.duboscq@oracle.com> |
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date | Mon, 01 Jun 2015 15:14:39 +0200 |
parents | graal/com.oracle.jvmci.code/src/com/oracle/jvmci/code/SpeculationLog.java@f5b549811bac |
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21628:35da7c00e2fa | 21629:36cf15e3219e |
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1 /* | |
2 * Copyright (c) 2012, 2014, Oracle and/or its affiliates. All rights reserved. | |
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. | |
4 * | |
5 * This code is free software; you can redistribute it and/or modify it | |
6 * under the terms of the GNU General Public License version 2 only, as | |
7 * published by the Free Software Foundation. | |
8 * | |
9 * This code is distributed in the hope that it will be useful, but WITHOUT | |
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
12 * version 2 for more details (a copy is included in the LICENSE file that | |
13 * accompanied this code). | |
14 * | |
15 * You should have received a copy of the GNU General Public License version | |
16 * 2 along with this work; if not, write to the Free Software Foundation, | |
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. | |
18 * | |
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA | |
20 * or visit www.oracle.com if you need additional information or have any | |
21 * questions. | |
22 */ | |
23 package com.oracle.jvmci.meta; | |
24 | |
25 import java.util.*; | |
26 import java.util.concurrent.*; | |
27 | |
28 /** | |
29 * Manages a list of unique deoptimization reasons. | |
30 * | |
31 */ | |
32 public abstract class SpeculationLog { | |
33 private volatile Object lastFailed; | |
34 private volatile Collection<Object> speculations; | |
35 private Set<Object> failedSpeculations; | |
36 | |
37 public synchronized void collectFailedSpeculations() { | |
38 if (lastFailed != null) { | |
39 if (failedSpeculations == null) { | |
40 failedSpeculations = new HashSet<>(2); | |
41 } | |
42 failedSpeculations.add(lastFailed); | |
43 lastFailed = null; | |
44 speculations = null; | |
45 } | |
46 } | |
47 | |
48 public boolean maySpeculate(Object reason) { | |
49 if (failedSpeculations != null && failedSpeculations.contains(reason)) { | |
50 return false; | |
51 } | |
52 return true; | |
53 } | |
54 | |
55 protected void addSpeculation(Object reason) { | |
56 assert maySpeculate(reason); | |
57 if (speculations == null) { | |
58 synchronized (this) { | |
59 if (speculations == null) { | |
60 speculations = new ConcurrentLinkedQueue<>(); | |
61 } | |
62 } | |
63 } | |
64 speculations.add(reason); | |
65 } | |
66 | |
67 public abstract JavaConstant speculate(Object reason); | |
68 } |