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 package org.graalvm.compiler.hotspot;
  24 
  25 import static org.graalvm.compiler.core.common.util.ModuleAPI.addExports;
  26 import static org.graalvm.compiler.core.common.util.ModuleAPI.addOpens;
  27 import static org.graalvm.compiler.core.common.util.ModuleAPI.getModule;
  28 import static org.graalvm.compiler.core.common.util.Util.JAVA_SPECIFICATION_VERSION;
  29 
  30 import org.graalvm.compiler.serviceprovider.ServiceProvider;
  31 
  32 import jdk.vm.ci.hotspot.HotSpotVMEventListener;
  33 import jdk.vm.ci.runtime.JVMCICompiler;
  34 import jdk.vm.ci.runtime.JVMCICompilerFactory;
  35 import jdk.vm.ci.services.JVMCIServiceLocator;
  36 
  37 @ServiceProvider(JVMCIServiceLocator.class)
  38 public final class HotSpotGraalJVMCIServiceLocator extends JVMCIServiceLocator {
  39 
  40     private boolean exportsAdded;
  41 
  42     /**
  43      * Dynamically exports and opens various internal JDK packages to the Graal module. This
  44      * requires only a single {@code --add-exports=java.base/jdk.internal.module=<Graal module>} on
  45      * the VM command line instead of a {@code --add-exports} instance for each JDK internal package
  46      * used by Graal.
  47      */
  48     private void addExports() {
  49         if (JAVA_SPECIFICATION_VERSION >= 9 && !exportsAdded) {
  50             Object javaBaseModule = getModule.invoke(String.class);
  51             Object graalModule = getModule.invoke(getClass());
  52             addExports.invokeStatic(javaBaseModule, "jdk.internal.misc", graalModule);
  53             addExports.invokeStatic(javaBaseModule, "jdk.internal.jimage", graalModule);
  54             addExports.invokeStatic(javaBaseModule, "com.sun.crypto.provider", graalModule);
  55             addOpens.invokeStatic(javaBaseModule, "jdk.internal.misc", graalModule);
  56             addOpens.invokeStatic(javaBaseModule, "jdk.internal.jimage", graalModule);
  57             addOpens.invokeStatic(javaBaseModule, "com.sun.crypto.provider", graalModule);
  58             exportsAdded = true;
  59         }
  60     }
  61 
  62     private HotSpotGraalRuntime graalRuntime;
  63 
  64     @Override
  65     public <T> T getProvider(Class<T> service) {
  66         if (service == JVMCICompilerFactory.class) {
  67             addExports();
  68             return service.cast(new HotSpotGraalCompilerFactory(this));
  69         } else if (service == HotSpotVMEventListener.class) {
  70             if (graalRuntime != null) {
  71                 addExports();
  72                 return service.cast(new HotSpotGraalVMEventListener(graalRuntime));
  73             }
  74         }
  75         return null;
  76     }
  77 
  78     /**
  79      * The signature cannot mention HotSpotGraalCompiler since it indirectly references
  80      * JVMCICompiler which is in a non-exported JVMCI package. This causes an IllegalAccessError
  81      * while looking for the
  82      * <a href="http://hg.openjdk.java.net/jdk9/hs/jdk/rev/89ef4b822745#l32.65">provider</a> factory
  83      * method:
  84      *
  85      * <pre>
  86      * java.util.ServiceConfigurationError: jdk.vm.ci.services.JVMCIServiceLocator: Unable to get public provider() method
  87      * ...
  88      * Caused by: java.lang.IllegalAccessError: superinterface check failed: class org.graalvm.compiler.api.runtime.GraalJVMCICompiler
  89      * (in module org.graalvm.compiler.graal_core) cannot access class jdk.vm.ci.runtime.JVMCICompiler (in module jdk.vm.ci) because
  90      * module jdk.vm.ci does not export jdk.vm.ci.runtime to module org.graalvm.compiler.graal_core
  91      * </pre>
  92      */
  93     void onCompilerCreation(JVMCICompiler compiler) {
  94         assert this.graalRuntime == null : "only expect a single JVMCICompiler to be created";
  95         this.graalRuntime = (HotSpotGraalRuntime) ((HotSpotGraalCompiler) compiler).getGraalRuntime();
  96     }
  97 }