GetBytecodeTest.java revision 12365:d1a00bd8dcca 
1/*
2 * Copyright (c) 2015, 2016, 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 * @bug 8136421
27 * @requires vm.jvmci
28 * @library /test/lib /
29 * @library ../common/patches
30 * @modules java.base/jdk.internal.misc
31 * @modules java.base/jdk.internal.org.objectweb.asm
32 *          java.base/jdk.internal.org.objectweb.asm.tree
33 *          jdk.vm.ci/jdk.vm.ci.hotspot
34 *          jdk.vm.ci/jdk.vm.ci.code
35 * @build jdk.vm.ci/jdk.vm.ci.hotspot.CompilerToVMHelper
36 * @run main/othervm -XX:+UnlockExperimentalVMOptions -XX:+EnableJVMCI
37 *                   compiler.jvmci.compilerToVM.GetBytecodeTest
38 */
39
40package compiler.jvmci.compilerToVM;
41
42import compiler.jvmci.common.CTVMUtilities;
43import compiler.jvmci.common.testcases.TestCase;
44import jdk.internal.org.objectweb.asm.Opcodes;
45import jdk.test.lib.Asserts;
46import jdk.vm.ci.hotspot.CompilerToVMHelper;
47import jdk.vm.ci.hotspot.HotSpotResolvedJavaMethod;
48
49import java.lang.reflect.Executable;
50import java.lang.reflect.Modifier;
51
52public class GetBytecodeTest {
53
54    public static void main(String[] args) {
55        TestCase.getAllExecutables()
56                .forEach(GetBytecodeTest::runSanityTest);
57    }
58
59    private static void runSanityTest(Executable aMethod) {
60        HotSpotResolvedJavaMethod method = CTVMUtilities
61                .getResolvedMethod(aMethod);
62        byte[] bytecode = CompilerToVMHelper.getBytecode(method);
63
64        int mods = aMethod.getModifiers();
65        boolean shouldHasZeroLength = Modifier.isAbstract(mods)
66                || Modifier.isNative(mods);
67        boolean correctLength = (bytecode.length == 0 && shouldHasZeroLength)
68                || (bytecode.length > 0 && !shouldHasZeroLength);
69
70        Asserts.assertTrue(correctLength, "Bytecode of '" + aMethod + "' has "
71                + bytecode.length + " length");
72
73        if (!shouldHasZeroLength) {
74            Asserts.assertTrue(containsReturn(bytecode), "Bytecode of '"
75                    + aMethod + "' doesn't have any return statement");
76        }
77    }
78
79    private static boolean containsReturn(byte[] bytecode) {
80        for (byte b : bytecode) {
81            //  cast unsigned byte to int
82            int value = (int) b & 0x000000FF;
83            switch (value) {
84                case Opcodes.RET:
85                case Opcodes.ARETURN:
86                case Opcodes.IRETURN:
87                case Opcodes.LRETURN:
88                case Opcodes.FRETURN:
89                case Opcodes.DRETURN:
90                case Opcodes.RETURN:
91                    return true;
92            }
93        }
94        return false;
95    }
96}
97