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 
  40 package compiler.jvmci.compilerToVM;
  41 
  42 import compiler.jvmci.common.CTVMUtilities;
  43 import compiler.jvmci.common.testcases.TestCase;
  44 import jdk.internal.org.objectweb.asm.Opcodes;
  45 import jdk.test.lib.Asserts;
  46 import jdk.vm.ci.hotspot.CompilerToVMHelper;
  47 import jdk.vm.ci.hotspot.HotSpotResolvedJavaMethod;
  48 
  49 import java.lang.reflect.Executable;
  50 import java.lang.reflect.Modifier;
  51 
  52 public 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 }