1 /*
2 * Copyright (c) 2011, 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 org.graalvm.compiler.replacements.test;
24
25 import java.util.Random;
26
27 import org.graalvm.compiler.core.test.GraalCompilerTest;
28 import org.graalvm.compiler.phases.common.AbstractInliningPhase;
29 import org.graalvm.compiler.test.ExportingClassLoader;
30 import org.junit.Assert;
31 import org.junit.Test;
32
33 import org.objectweb.asm.ClassWriter;
34 import org.objectweb.asm.Label;
35 import org.objectweb.asm.MethodVisitor;
36 import org.objectweb.asm.Opcodes;
37 import jdk.vm.ci.meta.ResolvedJavaMethod;
38
39 /**
40 * Tests that deoptimization upon exception handling works.
41 */
42 public class DeoptimizeOnExceptionTest extends GraalCompilerTest {
43
44 public DeoptimizeOnExceptionTest() {
45 getSuites().getHighTier().findPhase(AbstractInliningPhase.class).remove();
46 }
47
48 private static void raiseException(String m1, String m2, String m3, String m4, String m5) {
49 throw new RuntimeException(m1 + m2 + m3 + m4 + m5);
50 }
51
52 @Test
53 public void test1() {
54 test("test1Snippet", "m1", "m2", "m3", "m4", "m5");
55 }
56
57 // no local exception handler - will deopt
58 public static String test1Snippet(String m1, String m2, String m3, String m4, String m5) {
59 if (m1 != null) {
60 raiseException(m1, m2, m3, m4, m5);
61 }
62 return m1 + m2 + m3 + m4 + m5;
63 }
64
65 @Test
66 public void test2() {
67 test("test2Snippet");
68 }
69
70 public String test2Snippet() throws Exception {
71 try {
72 ClassLoader testCl = new MyClassLoader();
73 @SuppressWarnings("unchecked")
74 Class<Runnable> c = (Class<Runnable>) testCl.loadClass(name);
75 Runnable r = c.newInstance();
76 ct = Long.MAX_VALUE;
77 // warmup
78 for (int i = 0; i < 100; i++) {
79 r.run();
80 }
81 // compile
82 ResolvedJavaMethod method = getResolvedJavaMethod(c, "run");
83 getCode(method);
84 ct = 0;
85 r.run();
86 } catch (Throwable e) {
87 e.printStackTrace(System.out);
88 Assert.fail();
89 }
90 return "SUCCESS";
91 }
92
93 public static class MyClassLoader extends ExportingClassLoader {
94 @Override
95 protected Class<?> findClass(String className) throws ClassNotFoundException {
96 return defineClass(name.replace('/', '.'), clazz, 0, clazz.length);
97 }
98 }
99
100 public static void methodB() {
101 Random r = new Random(System.currentTimeMillis());
102 while (r.nextFloat() > .03f) {
103 // Empty
104 }
105
106 return;
107 }
108
109 public static void methodA() {
110 Random r = new Random(System.currentTimeMillis());
111 while (r.nextDouble() > .05) {
112 // Empty
113 }
114 return;
115 }
116
117 private static Object m = new Object();
118 static long ct = Long.MAX_VALUE;
119
120 public static Object getM() {
121 if (ct-- > 0) {
122 return m;
123 } else {
124 return null;
125 }
126 }
127
128 private static String name = "t/TestJSR";
129
130 private static final byte[] clazz = makeClazz();
131
132 private static byte[] makeClazz() {
133 // Code generated the class below using asm.
134 String clazzName = DeoptimizeOnExceptionTest.class.getName().replace('.', '/');
135 final ClassWriter w = new ClassWriter(0);
136 w.visit(Opcodes.V1_5, Opcodes.ACC_PUBLIC,
137 "t/TestJSR", null, "java/lang/Object",
138 new String[]{"java/lang/Runnable"});
139 MethodVisitor mv = w.visitMethod(Opcodes.ACC_PUBLIC, "<init>", "()V", null, new String[]{});
140 mv.visitCode();
141 mv.visitVarInsn(Opcodes.ALOAD, 0);
142 mv.visitMethodInsn(Opcodes.INVOKESPECIAL, "java/lang/Object", "<init>", "()V", false);
143 mv.visitInsn(Opcodes.RETURN);
144 mv.visitMaxs(10, 10);
145 mv.visitEnd();
146
147 mv = w.visitMethod(Opcodes.ACC_PUBLIC, "run", "()V", null, null);
148 mv.visitCode();
149 mv.visitMethodInsn(Opcodes.INVOKESTATIC, clazzName, "getM", "()Ljava/lang/Object;", false);
150 Label l1 = new Label();
151 mv.visitJumpInsn(Opcodes.JSR, l1);
152 mv.visitInsn(Opcodes.RETURN);
153
154 mv.visitLabel(l1);
155 mv.visitVarInsn(Opcodes.ASTORE, 1);
156
157 Label lElse = new Label();
158 Label lEnd = new Label();
159 mv.visitMethodInsn(Opcodes.INVOKESTATIC, "java/lang/System", "currentTimeMillis", "()J", false);
160 mv.visitInsn(Opcodes.POP2);
161 mv.visitMethodInsn(Opcodes.INVOKESTATIC, clazzName, "getM", "()Ljava/lang/Object;", false);
162 mv.visitInsn(Opcodes.DUP);
163 mv.visitJumpInsn(Opcodes.IFNULL, lElse);
164 mv.visitMethodInsn(Opcodes.INVOKESTATIC, clazzName, "methodA", "()V", false);
165 mv.visitJumpInsn(Opcodes.GOTO, lEnd);
166 mv.visitLabel(lElse);
167 mv.visitMethodInsn(Opcodes.INVOKESTATIC, clazzName, "methodB", "()V", false);
168 mv.visitLabel(lEnd);
169
170 mv.visitVarInsn(Opcodes.RET, 1);
171 mv.visitMaxs(10, 10);
172 mv.visitEnd();
173 return w.toByteArray();
174 }
175 }