1 /*
2 * Copyright (c) 2024, 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 /*
25 * @test
26 * @modules jdk.incubator.code
27 * @enablePreview
28 * @run junit TestSynchronizedOp
29 */
30
31 import jdk.incubator.code.Reflect;
32 import jdk.incubator.code.Op;
33 import jdk.incubator.code.bytecode.BytecodeGenerator;
34 import jdk.incubator.code.dialect.core.CoreOp;
35 import org.junit.jupiter.api.Assertions;
36 import org.junit.jupiter.api.Test;
37
38 import java.lang.classfile.ClassFile;
39 import java.lang.classfile.CodeModel;
40 import java.lang.classfile.MethodModel;
41 import java.lang.classfile.Opcode;
42 import java.lang.classfile.instruction.MonitorInstruction;
43 import java.lang.invoke.MethodHandle;
44 import java.lang.invoke.MethodHandles;
45 import java.lang.reflect.Method;
46 import java.util.Map;
47 import java.util.Optional;
48 import java.util.stream.Collectors;
49 import java.util.stream.Stream;
50
51 public class TestSynchronizedOp {
52
53 @Reflect
54 static int f(Object o, int i, int[] a) {
55 synchronized (o) {
56 if (i < 0) {
57 throw new RuntimeException();
58 }
59 a[0] = ++i;
60 }
61 return i;
62 }
63
64 @Test
65 public void testInstructions() {
66 CoreOp.FuncOp f = getFuncOp("f");
67
68 byte[] classdata = BytecodeGenerator.generateClassData(MethodHandles.lookup(), f);
69 CodeModel cmf = ClassFile.of().parse(classdata).methods().stream()
70 .filter(mm -> mm.methodName().equalsString("f"))
71 .findFirst().flatMap(MethodModel::code).orElseThrow();
72 Map<Opcode, Long> monitorCount = cmf.elementStream().<Opcode>mapMulti((i, c) -> {
73 if (i instanceof MonitorInstruction mi) {
74 c.accept(mi.opcode());
75 }
76 }).collect(Collectors.groupingBy(oc -> oc, Collectors.counting()));
77 Assertions.assertEquals(Map.of(
78 Opcode.MONITORENTER, 1L,
79 Opcode.MONITOREXIT, 2L), monitorCount);
80 }
81
82 @Test
83 public void testExecution() throws Throwable {
84 CoreOp.FuncOp f = getFuncOp("f");
85
86 MethodHandle mf = BytecodeGenerator.generate(MethodHandles.lookup(), f);
87
88 Object monitor = new Object();
89 int[] a = new int[1];
90 Assertions.assertEquals(1, (int) mf.invoke(monitor, 0, a));
91 a[0] = 0;
92 Assertions.assertThrows(RuntimeException.class, () -> {
93 int i = (int) mf.invoke(monitor, -1, a);
94 });
95 Assertions.assertEquals(0, a[0]);
96 }
97
98 static CoreOp.FuncOp getFuncOp(String name) {
99 Optional<Method> om = Stream.of(TestSynchronizedOp.class.getDeclaredMethods())
100 .filter(m -> m.getName().equals(name))
101 .findFirst();
102
103 Method m = om.get();
104 return Op.ofMethod(m).get();
105 }
106 }