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:+open
  31  * @modules jdk.vm.ci/jdk.vm.ci.hotspot:+open
  32  *
  33  * @build jdk.vm.ci/jdk.vm.ci.hotspot.CompilerToVMHelper
  34  *        jdk.vm.ci/jdk.vm.ci.hotspot.PublicMetaspaceWrapperObject
  35  *        sun.hotspot.WhiteBox
  36  * @run driver ClassFileInstaller sun.hotspot.WhiteBox
  37  *                                sun.hotspot.WhiteBox$WhiteBoxPermission
  38  * @run main/othervm -Xbootclasspath/a:.
  39  *                   -XX:+UnlockDiagnosticVMOptions -XX:+WhiteBoxAPI
  40  *                   -XX:+UnlockExperimentalVMOptions -XX:+EnableJVMCI
  41  *                   compiler.jvmci.compilerToVM.GetResolvedJavaMethodTest
  42  */
  43 
  44 package compiler.jvmci.compilerToVM;
  45 
  46 import jdk.internal.misc.Unsafe;
  47 import jdk.test.lib.Asserts;
  48 import jdk.vm.ci.hotspot.CompilerToVMHelper;
  49 import jdk.vm.ci.hotspot.HotSpotResolvedJavaMethod;
  50 import jdk.vm.ci.hotspot.PublicMetaspaceWrapperObject;
  51 import sun.hotspot.WhiteBox;
  52 
  53 import java.lang.reflect.Field;
  54 import java.lang.reflect.Method;
  55 
  56 public class GetResolvedJavaMethodTest {
  57     private static enum TestCase {
  58         NULL_BASE {
  59             @Override
  60             HotSpotResolvedJavaMethod getResolvedJavaMethod() {
  61                 return CompilerToVMHelper.getResolvedJavaMethod(
  62                         null, getPtrToMethod());
  63             }
  64         },
  65         JAVA_METHOD_BASE {
  66             @Override
  67             HotSpotResolvedJavaMethod getResolvedJavaMethod() {
  68                 HotSpotResolvedJavaMethod methodInstance = TEST_METHOD;
  69                 try {
  70                     METASPACE_METHOD_FIELD.set(methodInstance,
  71                             getPtrToMethod());
  72                 } catch (ReflectiveOperationException e) {
  73                     throw new Error("TEST BUG : " + e, e);
  74                 }
  75                 return CompilerToVMHelper.getResolvedJavaMethod(
  76                         methodInstance, 0L);
  77             }
  78         },
  79         JAVA_METHOD_BASE_IN_TWO {
  80             @Override
  81             HotSpotResolvedJavaMethod getResolvedJavaMethod() {
  82                 long ptr = getPtrToMethod();
  83                 HotSpotResolvedJavaMethod methodInstance = TEST_METHOD;
  84                 try {
  85                     METASPACE_METHOD_FIELD.set(methodInstance, ptr / 2L);
  86                 } catch (ReflectiveOperationException e) {
  87                     throw new Error("TESTBUG : " + e, e);
  88                 }
  89                 return CompilerToVMHelper.getResolvedJavaMethod(methodInstance,
  90                         ptr - ptr / 2L);
  91             }
  92         },
  93         JAVA_METHOD_BASE_ZERO {
  94             @Override
  95             HotSpotResolvedJavaMethod getResolvedJavaMethod() {
  96                 long ptr = getPtrToMethod();
  97                 HotSpotResolvedJavaMethod methodInstance = TEST_METHOD;
  98                 try {
  99                     METASPACE_METHOD_FIELD.set(methodInstance, 0L);
 100                 } catch (ReflectiveOperationException e) {
 101                     throw new Error("TESTBUG : " + e, e);
 102                 }
 103                 return CompilerToVMHelper.getResolvedJavaMethod(methodInstance,
 104                         ptr);
 105             }
 106         }
 107         ;
 108         abstract HotSpotResolvedJavaMethod getResolvedJavaMethod();
 109     }
 110 
 111     private static final Unsafe UNSAFE = Unsafe.getUnsafe();
 112     private static final WhiteBox WB = WhiteBox.getWhiteBox();
 113     private static final Field METASPACE_METHOD_FIELD;
 114     private static final Class<?> TEST_CLASS = GetResolvedJavaMethodTest.class;
 115     private static final HotSpotResolvedJavaMethod TEST_METHOD;
 116     private static final long PTR;
 117     static  {
 118         try {
 119             Method method = TEST_CLASS.getDeclaredMethod("test", TestCase.class);
 120             TEST_METHOD = CompilerToVMHelper.asResolvedJavaMethod(method);
 121         } catch (NoSuchMethodException e) {
 122             throw new Error("TESTBUG : " + e, e);
 123         }
 124         try {
 125             // jdk.vm.ci.hotspot.HotSpotResolvedJavaMethodImpl.metaspaceMethod
 126             METASPACE_METHOD_FIELD = TEST_METHOD.getClass()
 127                     .getDeclaredField("metaspaceMethod");
 128             METASPACE_METHOD_FIELD.setAccessible(true);
 129             PTR = (long) METASPACE_METHOD_FIELD.get(TEST_METHOD);
 130         } catch (ReflectiveOperationException e) {
 131             throw new Error("TESTBUG : " + e, e);
 132         }
 133 
 134     }
 135 
 136     private static long getPtrToMethod() {
 137         Field field;
 138         try {
 139             field = TEST_CLASS.getDeclaredField("PTR");
 140         } catch (NoSuchFieldException e) {
 141             throw new Error("TEST BUG : " + e, e);
 142         }
 143         Object base = UNSAFE.staticFieldBase(field);
 144         return WB.getObjectAddress(base) + UNSAFE.staticFieldOffset(field);
 145     }
 146 
 147     public void test(TestCase testCase) {
 148         System.out.println(testCase.name());
 149         HotSpotResolvedJavaMethod result = testCase.getResolvedJavaMethod();
 150         Asserts.assertNotNull(result, testCase + " : got null");
 151         Asserts.assertEQ(TEST_CLASS,
 152                 CompilerToVMHelper.getMirror(result.getDeclaringClass()),
 153                 testCase + " : unexpected declaring class");
 154     }
 155 
 156     public static void main(String[] args) {
 157         GetResolvedJavaMethodTest test = new GetResolvedJavaMethodTest();
 158         for (TestCase testCase : TestCase.values()) {
 159             test.test(testCase);
 160         }
 161         testObjectBase();
 162         testMetaspaceWrapperBase();
 163     }
 164 
 165     private static void testMetaspaceWrapperBase() {
 166         try {
 167             HotSpotResolvedJavaMethod method
 168                     = CompilerToVMHelper.getResolvedJavaMethod(
 169                             new PublicMetaspaceWrapperObject() {
 170                                 @Override
 171                                 public long getMetaspacePointer() {
 172                                     return getPtrToMethod();
 173                                 }
 174                             }, 0L);
 175             throw new AssertionError("Test METASPACE_WRAPPER_BASE."
 176                     + " Expected IllegalArgumentException has not been caught");
 177         } catch (IllegalArgumentException e) {
 178             // expected
 179         }
 180     }
 181 
 182     private static void testObjectBase() {
 183         try {
 184             HotSpotResolvedJavaMethod method
 185                     = CompilerToVMHelper.getResolvedJavaMethod(new Object(), 0L);
 186             throw new AssertionError("Test OBJECT_BASE."
 187                 + " Expected IllegalArgumentException has not been caught");
 188         } catch (IllegalArgumentException e) {
 189             // expected
 190         }
 191     }
 192 }
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