/* * Copyright (c) 2015, 2019, Oracle and/or its affiliates. All rights reserved. * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. * * This code is free software; you can redistribute it and/or modify it * under the terms of the GNU General Public License version 2 only, as * published by the Free Software Foundation. * * This code is distributed in the hope that it will be useful, but WITHOUT * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License * version 2 for more details (a copy is included in the LICENSE file that * accompanied this code). * * You should have received a copy of the GNU General Public License version * 2 along with this work; if not, write to the Free Software Foundation, * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. * * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA * or visit www.oracle.com if you need additional information or have any * questions. */ package jdk.vm.ci.hotspot; import java.util.List; import java.util.Set; import jdk.vm.ci.code.CompilationRequest; import jdk.vm.ci.common.JVMCIError; import jdk.vm.ci.common.NativeImageReinitialize; import jdk.vm.ci.hotspot.HotSpotJVMCIRuntime.Option; import jdk.vm.ci.runtime.JVMCICompiler; import jdk.vm.ci.runtime.JVMCICompilerFactory; import jdk.vm.ci.runtime.JVMCIRuntime; import jdk.vm.ci.services.JVMCIPermission; import jdk.vm.ci.services.JVMCIServiceLocator; import static jdk.vm.ci.services.Services.IS_IN_NATIVE_IMAGE; final class HotSpotJVMCICompilerConfig { /** * This factory allows JVMCI initialization to succeed but raises an error if the VM asks JVMCI * to perform a compilation. This allows the reflective parts of the JVMCI API to be used * without requiring a compiler implementation to be available. */ private static class DummyCompilerFactory implements JVMCICompilerFactory, JVMCICompiler { private final String reason; DummyCompilerFactory(String reason) { this.reason = reason; } @Override public HotSpotCompilationRequestResult compileMethod(CompilationRequest request) { throw new JVMCIError("no JVMCI compiler selected: " + reason); } @Override public String getCompilerName() { return "null"; } @Override public JVMCICompiler createCompiler(JVMCIRuntime runtime) { return this; } } /** * Factory of the selected system compiler. */ @NativeImageReinitialize private static JVMCICompilerFactory compilerFactory; /** * Gets the selected system compiler factory. * * @return the selected system compiler factory * @throws SecurityException if a security manager is present and it denies * {@link JVMCIPermission} for any {@link JVMCIServiceLocator} loaded by this method */ static JVMCICompilerFactory getCompilerFactory() { if (compilerFactory == null) { JVMCICompilerFactory factory = null; String compilerName = Option.Compiler.getString(); if (compilerName != null) { if (compilerName.isEmpty()) { factory = new DummyCompilerFactory(" empty \"\" is specified"); } else if (compilerName.equals("null")) { factory = new DummyCompilerFactory("\"null\" is specified"); } else { for (JVMCICompilerFactory f : getJVMCICompilerFactories()) { if (f.getCompilerName().equals(compilerName)) { factory = f; } } if (factory == null) { throw new JVMCIError("JVMCI compiler '%s' not found", compilerName); } } } else { // Auto select a single available compiler String reason = "default compiler is not found"; for (JVMCICompilerFactory f : getJVMCICompilerFactories()) { if (factory == null) { openJVMCITo(f.getClass().getModule()); factory = f; } else { // Multiple factories seen - cancel auto selection reason = "multiple factories seen: \"" + factory.getCompilerName() + "\" and \"" + f.getCompilerName() + "\""; factory = null; break; } } if (factory == null) { factory = new DummyCompilerFactory(reason); } } factory.onSelection(); compilerFactory = factory; } return compilerFactory; } /** * Opens all JVMCI packages to {@code otherModule}. */ private static void openJVMCITo(Module otherModule) { if (!IS_IN_NATIVE_IMAGE) { Module jvmci = HotSpotJVMCICompilerConfig.class.getModule(); if (jvmci != otherModule) { Set packages = jvmci.getPackages(); for (String pkg : packages) { boolean opened = jvmci.isOpen(pkg, otherModule); if (!opened) { jvmci.addOpens(pkg, otherModule); } } } } } private static List getJVMCICompilerFactories() { return JVMCIServiceLocator.getProviders(JVMCICompilerFactory.class); } }