Mercurial > hg > truffle
comparison test/compiler/classUnloading/methodUnloading/TestMethodUnloading.java @ 20290:85c339200299
8029443: 'assert(klass->is_loader_alive(_is_alive)) failed: must be alive' during VM_CollectForMetadataAllocation
Summary: Added missing metadata relocation to 'loadConP_no_oop_cheap' on Sparc if the pointer is referring to a Klass. Added jtreg test.
Reviewed-by: kvn
author | thartmann |
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date | Wed, 06 Aug 2014 08:47:40 +0200 |
parents | |
children | d2c5fee67143 |
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20289:69ea58782b1a | 20290:85c339200299 |
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1 /* | |
2 * Copyright (c) 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 | |
24 import sun.hotspot.WhiteBox; | |
25 | |
26 import java.lang.reflect.Method; | |
27 import java.net.URL; | |
28 import java.net.URLClassLoader; | |
29 | |
30 /* | |
31 * @test MethodUnloadingTest | |
32 * @bug 8029443 | |
33 * @summary "Tests the unloading of methods to to class unloading" | |
34 * @library /testlibrary /testlibrary/whitebox | |
35 * @build TestMethodUnloading | |
36 * @build WorkerClass | |
37 * @run main ClassFileInstaller sun.hotspot.WhiteBox | |
38 * @run main/othervm -Xbootclasspath/a:. -XX:+IgnoreUnrecognizedVMOptions -XX:+UnlockDiagnosticVMOptions -XX:+WhiteBoxAPI -XX:-BackgroundCompilation -XX:-UseCompressedOops -XX:+UseParallelGC -XX:CompileOnly=TestMethodUnloading::doWork TestMethodUnloading | |
39 */ | |
40 public class TestMethodUnloading { | |
41 private static final String workerClassName = "WorkerClass"; | |
42 private static int work = -1; | |
43 | |
44 private static final WhiteBox WHITE_BOX = WhiteBox.getWhiteBox(); | |
45 private static int COMP_LEVEL_SIMPLE = 1; | |
46 private static int COMP_LEVEL_FULL_OPTIMIZATION = 4; | |
47 | |
48 /** | |
49 * Does some work by either using the workerClass or locally producing values. | |
50 * @param workerClass Class performing some work (will be unloaded) | |
51 * @param useWorker If true the workerClass is used | |
52 */ | |
53 static private void doWork(Class<?> workerClass, boolean useWorker) throws InstantiationException, IllegalAccessException { | |
54 if (useWorker) { | |
55 // Create a new instance | |
56 Object worker = workerClass.newInstance(); | |
57 // We would like to call a method of WorkerClass here but we cannot cast to WorkerClass | |
58 // because the class was loaded by a different class loader. One solution would be to use | |
59 // reflection but since we want C2 to implement the call as an optimized IC we call | |
60 // Object::hashCode() here which actually calls WorkerClass::hashCode(). | |
61 // C2 will then implement this call as an optimized IC that points to a to-interpreter stub | |
62 // referencing the Method* for WorkerClass::hashCode(). | |
63 work = worker.hashCode(); | |
64 if (work != 42) { | |
65 new RuntimeException("Work not done"); | |
66 } | |
67 } else { | |
68 // Do some important work here | |
69 work = 1; | |
70 } | |
71 } | |
72 | |
73 /** | |
74 * Makes sure that method is compiled by forcing compilation if not yet compiled. | |
75 * @param m Method to be checked | |
76 */ | |
77 static private void makeSureIsCompiled(Method m) { | |
78 // Make sure background compilation is disabled | |
79 if (WHITE_BOX.getBooleanVMFlag("BackgroundCompilation")) { | |
80 throw new RuntimeException("Background compilation enabled"); | |
81 } | |
82 | |
83 // Check if already compiled | |
84 if (!WHITE_BOX.isMethodCompiled(m)) { | |
85 // If not, try to compile it with C2 | |
86 if(!WHITE_BOX.enqueueMethodForCompilation(m, COMP_LEVEL_FULL_OPTIMIZATION)) { | |
87 // C2 compiler not available, try to compile with C1 | |
88 WHITE_BOX.enqueueMethodForCompilation(m, COMP_LEVEL_SIMPLE); | |
89 } | |
90 // Because background compilation is disabled, method should now be compiled | |
91 if(!WHITE_BOX.isMethodCompiled(m)) { | |
92 throw new RuntimeException(m + " not compiled"); | |
93 } | |
94 } | |
95 } | |
96 | |
97 /** | |
98 * This test creates stale Method* metadata in a to-interpreter stub of an optimized IC. | |
99 * | |
100 * The following steps are performed: | |
101 * (1) A workerClass is loaded by a custom class loader | |
102 * (2) The method doWork that calls a method of the workerClass is compiled. The call | |
103 * is implemented as an optimized IC calling a to-interpreted stub. The to-interpreter | |
104 * stub contains a Method* to a workerClass method. | |
105 * (3) Unloading of the workerClass is enforced. The to-interpreter stub now contains a dead Method*. | |
106 * (4) Depending on the implementation of the IC, the compiled version of doWork should still be | |
107 * valid. We call it again without using the workerClass. | |
108 */ | |
109 static public void main(String[] args) throws Exception { | |
110 // (1) Create a custom class loader with no parent class loader | |
111 URL url = TestMethodUnloading.class.getProtectionDomain().getCodeSource().getLocation(); | |
112 URLClassLoader loader = new URLClassLoader(new URL[] {url}, null); | |
113 | |
114 // Load worker class with custom class loader | |
115 Class<?> workerClass = Class.forName(workerClassName, true, loader); | |
116 | |
117 // (2) Make sure all paths of doWork are profiled and compiled | |
118 for (int i = 0; i < 100000; ++i) { | |
119 doWork(workerClass, true); | |
120 doWork(workerClass, false); | |
121 } | |
122 | |
123 // Make sure doWork is compiled now | |
124 Method doWork = TestMethodUnloading.class.getDeclaredMethod("doWork", Class.class, boolean.class); | |
125 makeSureIsCompiled(doWork); | |
126 | |
127 // (3) Throw away class loader and reference to workerClass to allow unloading | |
128 loader.close(); | |
129 loader = null; | |
130 workerClass = null; | |
131 | |
132 // Force garbage collection to trigger unloading of workerClass | |
133 // Dead reference to WorkerClass::hashCode triggers JDK-8029443 | |
134 WHITE_BOX.fullGC(); | |
135 | |
136 // (4) Depending on the implementation of the IC, the compiled version of doWork | |
137 // may still be valid here. Execute it without a workerClass. | |
138 doWork(null, false); | |
139 if (work != 1) { | |
140 throw new RuntimeException("Work not done"); | |
141 } | |
142 | |
143 doWork(Object.class, false); | |
144 } | |
145 } |