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/*
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* Copyright (c) 2015, 2016, Oracle and/or its affiliates. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*/
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package jdk.vm.ci.hotspot;
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import static jdk.vm.ci.common.InitTimer.timer;
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import java.io.IOException;
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import java.io.OutputStream;
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import java.io.PrintStream;
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import java.util.Collections;
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import java.util.HashMap;
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import java.util.List;
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import java.util.Map;
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import java.util.Objects;
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import java.util.ServiceLoader;
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import java.util.TreeMap;
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import jdk.internal.misc.VM;
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import jdk.vm.ci.code.Architecture;
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import jdk.vm.ci.code.CompilationRequestResult;
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import jdk.vm.ci.code.CompiledCode;
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import jdk.vm.ci.code.InstalledCode;
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import jdk.vm.ci.common.InitTimer;
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import jdk.vm.ci.common.JVMCIError;
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import jdk.vm.ci.hotspot.HotSpotJVMCICompilerFactory.CompilationLevel;
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import jdk.vm.ci.meta.JavaKind;
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import jdk.vm.ci.meta.JavaType;
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import jdk.vm.ci.meta.ResolvedJavaType;
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import jdk.vm.ci.runtime.JVMCI;
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import jdk.vm.ci.runtime.JVMCIBackend;
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import jdk.vm.ci.runtime.JVMCICompiler;
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import jdk.vm.ci.runtime.JVMCICompilerFactory;
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import jdk.vm.ci.services.JVMCIServiceLocator;
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/**
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* HotSpot implementation of a JVMCI runtime.
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*
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* The initialization of this class is very fragile since it's initialized both through
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* {@link JVMCI#initialize()} or through calling {@link HotSpotJVMCIRuntime#runtime()} and
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* {@link HotSpotJVMCIRuntime#runtime()} is also called by {@link JVMCI#initialize()}. So this class
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* can't have a static initializer and any required initialization must be done as part of
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* {@link #runtime()}. This allows the initialization to funnel back through
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* {@link JVMCI#initialize()} without deadlocking.
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*/
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public final class HotSpotJVMCIRuntime implements HotSpotJVMCIRuntimeProvider {
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@SuppressWarnings("try")
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static class DelayedInit {
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private static final HotSpotJVMCIRuntime instance;
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static {
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try (InitTimer t = timer("HotSpotJVMCIRuntime.<init>")) {
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instance = new HotSpotJVMCIRuntime();
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}
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}
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}
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/**
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* Gets the singleton {@link HotSpotJVMCIRuntime} object.
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*/
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public static HotSpotJVMCIRuntime runtime() {
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JVMCI.initialize();
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return DelayedInit.instance;
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}
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/**
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* A list of all supported JVMCI options.
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*/
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public enum Option {
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// @formatter:off
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Compiler(String.class, null, "Selects the system compiler. This must match the getCompilerName() value returned " +
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"by a jdk.vm.ci.runtime.JVMCICompilerFactory provider. " +
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"An empty string or the value \"null\" selects a compiler " +
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"that will raise an exception upon receiving a compilation request."),
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// Note: The following one is not used (see InitTimer.ENABLED). It is added here
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// so that -XX:+JVMCIPrintProperties shows the option.
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InitTimer(Boolean.class, false, "Specifies if initialization timing is enabled."),
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PrintConfig(Boolean.class, false, "Prints VM configuration available via JVMCI."),
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TraceMethodDataFilter(String.class, null,
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"Enables tracing of profiling info when read by JVMCI.",
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"Empty value: trace all methods",
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"Non-empty value: trace methods whose fully qualified name contains the value."),
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UseProfilingInformation(Boolean.class, true, "");
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// @formatter:on
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/**
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* The prefix for system properties that are JVMCI options.
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*/
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private static final String JVMCI_OPTION_PROPERTY_PREFIX = "jvmci.";
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/**
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* Marker for uninitialized flags.
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*/
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private static final String UNINITIALIZED = "UNINITIALIZED";
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private final Class<?> type;
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private Object value;
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private final Object defaultValue;
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private boolean isDefault;
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private final String[] helpLines;
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Option(Class<?> type, Object defaultValue, String... helpLines) {
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assert Character.isUpperCase(name().charAt(0)) : "Option name must start with upper-case letter: " + name();
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this.type = type;
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this.value = UNINITIALIZED;
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this.defaultValue = defaultValue;
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this.helpLines = helpLines;
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}
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@SuppressFBWarnings(value = "ES_COMPARING_STRINGS_WITH_EQ", justification = "sentinel must be String since it's a static final in an enum")
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private Object getValue() {
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if (value == UNINITIALIZED) {
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String propertyValue = VM.getSavedProperty(getPropertyName());
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if (propertyValue == null) {
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this.value = defaultValue;
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this.isDefault = true;
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} else {
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if (type == Boolean.class) {
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this.value = Boolean.parseBoolean(propertyValue);
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} else if (type == String.class) {
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this.value = propertyValue;
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} else {
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throw new JVMCIError("Unexpected option type " + type);
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}
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this.isDefault = false;
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}
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// Saved properties should not be interned - let's be sure
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assert value != UNINITIALIZED;
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}
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return value;
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}
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/**
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* Gets the name of system property from which this option gets its value.
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*/
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public String getPropertyName() {
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return JVMCI_OPTION_PROPERTY_PREFIX + name();
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}
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/**
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* Returns the option's value as boolean.
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*
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* @return option's value
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*/
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public boolean getBoolean() {
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return (boolean) getValue();
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}
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/**
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* Returns the option's value as String.
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*
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* @return option's value
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*/
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public String getString() {
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return (String) getValue();
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}
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private static final int PROPERTY_LINE_WIDTH = 80;
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private static final int PROPERTY_HELP_INDENT = 10;
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/**
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* Prints a description of the properties used to configure shared JVMCI code.
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*
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* @param out stream to print to
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*/
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public static void printProperties(PrintStream out) {
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out.println("[JVMCI properties]");
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Option[] values = values();
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for (Option option : values) {
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Object value = option.getValue();
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if (value instanceof String) {
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value = '"' + String.valueOf(value) + '"';
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}
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String name = option.getPropertyName();
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String assign = option.isDefault ? "=" : ":=";
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String typeName = option.type.getSimpleName();
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String linePrefix = String.format("%s %s %s ", name, assign, value);
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int typeStartPos = PROPERTY_LINE_WIDTH - typeName.length();
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int linePad = typeStartPos - linePrefix.length();
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if (linePad > 0) {
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out.printf("%s%-" + linePad + "s[%s]%n", linePrefix, "", typeName);
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} else {
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out.printf("%s[%s]%n", linePrefix, typeName);
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}
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for (String line : option.helpLines) {
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out.printf("%" + PROPERTY_HELP_INDENT + "s%s%n", "", line);
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}
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}
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}
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}
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public static HotSpotJVMCIBackendFactory findFactory(String architecture) {
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for (HotSpotJVMCIBackendFactory factory : ServiceLoader.load(HotSpotJVMCIBackendFactory.class, ClassLoader.getSystemClassLoader())) {
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if (factory.getArchitecture().equalsIgnoreCase(architecture)) {
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return factory;
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}
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}
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throw new JVMCIError("No JVMCI runtime available for the %s architecture", architecture);
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}
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/**
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* Gets the kind of a word value on the {@linkplain #getHostJVMCIBackend() host} backend.
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*/
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public static JavaKind getHostWordKind() {
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return runtime().getHostJVMCIBackend().getCodeCache().getTarget().wordJavaKind;
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}
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protected final CompilerToVM compilerToVm;
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protected final HotSpotVMConfigStore configStore;
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protected final HotSpotVMConfig config;
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private final JVMCIBackend hostBackend;
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private final JVMCICompilerFactory compilerFactory;
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private final HotSpotJVMCICompilerFactory hsCompilerFactory;
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private volatile JVMCICompiler compiler;
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protected final HotSpotJVMCIMetaAccessContext metaAccessContext;
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/**
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* Stores the result of {@link HotSpotJVMCICompilerFactory#getCompilationLevelAdjustment} so
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* that it can be read from the VM.
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*/
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@SuppressWarnings("unused") private final int compilationLevelAdjustment;
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private final Map<Class<? extends Architecture>, JVMCIBackend> backends = new HashMap<>();
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private volatile List<HotSpotVMEventListener> vmEventListeners;
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private Iterable<HotSpotVMEventListener> getVmEventListeners() {
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if (vmEventListeners == null) {
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synchronized (this) {
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if (vmEventListeners == null) {
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vmEventListeners = JVMCIServiceLocator.getProviders(HotSpotVMEventListener.class);
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}
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}
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}
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return vmEventListeners;
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}
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/**
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* Stores the result of {@link HotSpotJVMCICompilerFactory#getTrivialPrefixes()} so that it can
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* be read from the VM.
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*/
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@SuppressWarnings("unused") private final String[] trivialPrefixes;
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@SuppressWarnings("try")
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private HotSpotJVMCIRuntime() {
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compilerToVm = new CompilerToVM();
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try (InitTimer t = timer("HotSpotVMConfig<init>")) {
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configStore = new HotSpotVMConfigStore(compilerToVm);
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config = new HotSpotVMConfig(configStore);
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}
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String hostArchitecture = config.getHostArchitectureName();
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HotSpotJVMCIBackendFactory factory;
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try (InitTimer t = timer("find factory:", hostArchitecture)) {
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factory = findFactory(hostArchitecture);
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}
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try (InitTimer t = timer("create JVMCI backend:", hostArchitecture)) {
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hostBackend = registerBackend(factory.createJVMCIBackend(this, null));
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}
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metaAccessContext = new HotSpotJVMCIMetaAccessContext();
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compilerFactory = HotSpotJVMCICompilerConfig.getCompilerFactory();
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if (compilerFactory instanceof HotSpotJVMCICompilerFactory) {
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hsCompilerFactory = (HotSpotJVMCICompilerFactory) compilerFactory;
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trivialPrefixes = hsCompilerFactory.getTrivialPrefixes();
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switch (hsCompilerFactory.getCompilationLevelAdjustment()) {
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case None:
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compilationLevelAdjustment = config.compLevelAdjustmentNone;
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break;
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case ByHolder:
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compilationLevelAdjustment = config.compLevelAdjustmentByHolder;
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break;
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case ByFullSignature:
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compilationLevelAdjustment = config.compLevelAdjustmentByFullSignature;
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break;
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default:
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compilationLevelAdjustment = config.compLevelAdjustmentNone;
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break;
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}
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} else {
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hsCompilerFactory = null;
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trivialPrefixes = null;
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compilationLevelAdjustment = config.compLevelAdjustmentNone;
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}
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if (config.getFlag("JVMCIPrintProperties", Boolean.class)) {
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PrintStream out = new PrintStream(getLogStream());
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Option.printProperties(out);
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compilerFactory.printProperties(out);
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System.exit(0);
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}
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if (Option.PrintConfig.getBoolean()) {
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printConfig(configStore, compilerToVm);
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}
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}
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private JVMCIBackend registerBackend(JVMCIBackend backend) {
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Class<? extends Architecture> arch = backend.getCodeCache().getTarget().arch.getClass();
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JVMCIBackend oldValue = backends.put(arch, backend);
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assert oldValue == null : "cannot overwrite existing backend for architecture " + arch.getSimpleName();
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return backend;
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}
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public ResolvedJavaType fromClass(Class<?> javaClass) {
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return metaAccessContext.fromClass(javaClass);
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}
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public HotSpotVMConfigStore getConfigStore() {
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return configStore;
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}
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public HotSpotVMConfig getConfig() {
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return config;
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}
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public CompilerToVM getCompilerToVM() {
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return compilerToVm;
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}
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public JVMCICompiler getCompiler() {
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if (compiler == null) {
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synchronized (this) {
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if (compiler == null) {
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compiler = compilerFactory.createCompiler(this);
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}
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}
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}
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return compiler;
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}
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public JavaType lookupType(String name, HotSpotResolvedObjectType accessingType, boolean resolve) {
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Objects.requireNonNull(accessingType, "cannot resolve type without an accessing class");
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// If the name represents a primitive type we can short-circuit the lookup.
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if (name.length() == 1) {
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JavaKind kind = JavaKind.fromPrimitiveOrVoidTypeChar(name.charAt(0));
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return fromClass(kind.toJavaClass());
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}
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// Resolve non-primitive types in the VM.
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HotSpotResolvedObjectTypeImpl hsAccessingType = (HotSpotResolvedObjectTypeImpl) accessingType;
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final HotSpotResolvedObjectTypeImpl klass = compilerToVm.lookupType(name, hsAccessingType.mirror(), resolve);
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if (klass == null) {
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assert resolve == false;
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return HotSpotUnresolvedJavaType.create(this, name);
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}
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return klass;
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}
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public JVMCIBackend getHostJVMCIBackend() {
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return hostBackend;
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}
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public <T extends Architecture> JVMCIBackend getJVMCIBackend(Class<T> arch) {
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assert arch != Architecture.class;
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return backends.get(arch);
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}
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public Map<Class<? extends Architecture>, JVMCIBackend> getJVMCIBackends() {
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return Collections.unmodifiableMap(backends);
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}
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/**
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* Called from the VM.
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*/
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@SuppressWarnings({"unused"})
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private int adjustCompilationLevel(Class<?> declaringClass, String name, String signature, boolean isOsr, int level) {
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CompilationLevel curLevel;
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if (level == config.compilationLevelNone) {
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curLevel = CompilationLevel.None;
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} else if (level == config.compilationLevelSimple) {
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curLevel = CompilationLevel.Simple;
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} else if (level == config.compilationLevelLimitedProfile) {
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curLevel = CompilationLevel.LimitedProfile;
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|
404 |
} else if (level == config.compilationLevelFullProfile) {
|
|
405 |
curLevel = CompilationLevel.FullProfile;
|
|
406 |
} else if (level == config.compilationLevelFullOptimization) {
|
|
407 |
curLevel = CompilationLevel.FullOptimization;
|
|
408 |
} else {
|
|
409 |
throw JVMCIError.shouldNotReachHere();
|
|
410 |
}
|
|
411 |
|
|
412 |
switch (hsCompilerFactory.adjustCompilationLevel(declaringClass, name, signature, isOsr, curLevel)) {
|
|
413 |
case None:
|
|
414 |
return config.compilationLevelNone;
|
|
415 |
case Simple:
|
|
416 |
return config.compilationLevelSimple;
|
|
417 |
case LimitedProfile:
|
|
418 |
return config.compilationLevelLimitedProfile;
|
|
419 |
case FullProfile:
|
|
420 |
return config.compilationLevelFullProfile;
|
|
421 |
case FullOptimization:
|
|
422 |
return config.compilationLevelFullOptimization;
|
|
423 |
default:
|
|
424 |
return level;
|
|
425 |
}
|
|
426 |
}
|
|
427 |
|
|
428 |
/**
|
|
429 |
* Called from the VM.
|
|
430 |
*/
|
|
431 |
@SuppressWarnings({"unused"})
|
|
432 |
private HotSpotCompilationRequestResult compileMethod(HotSpotResolvedJavaMethod method, int entryBCI, long jvmciEnv, int id) {
|
|
433 |
CompilationRequestResult result = getCompiler().compileMethod(new HotSpotCompilationRequest(method, entryBCI, jvmciEnv, id));
|
|
434 |
assert result != null : "compileMethod must always return something";
|
|
435 |
HotSpotCompilationRequestResult hsResult;
|
|
436 |
if (result instanceof HotSpotCompilationRequestResult) {
|
|
437 |
hsResult = (HotSpotCompilationRequestResult) result;
|
|
438 |
} else {
|
|
439 |
Object failure = result.getFailure();
|
|
440 |
if (failure != null) {
|
|
441 |
boolean retry = false; // Be conservative with unknown compiler
|
|
442 |
hsResult = HotSpotCompilationRequestResult.failure(failure.toString(), retry);
|
|
443 |
} else {
|
|
444 |
int inlinedBytecodes = -1;
|
|
445 |
hsResult = HotSpotCompilationRequestResult.success(inlinedBytecodes);
|
|
446 |
}
|
|
447 |
}
|
|
448 |
|
|
449 |
return hsResult;
|
|
450 |
}
|
|
451 |
|
|
452 |
/**
|
|
453 |
* Shuts down the runtime.
|
|
454 |
*
|
|
455 |
* Called from the VM.
|
|
456 |
*/
|
|
457 |
@SuppressWarnings({"unused"})
|
|
458 |
private void shutdown() throws Exception {
|
|
459 |
for (HotSpotVMEventListener vmEventListener : getVmEventListeners()) {
|
|
460 |
vmEventListener.notifyShutdown();
|
|
461 |
}
|
|
462 |
}
|
|
463 |
|
|
464 |
/**
|
|
465 |
* Notify on completion of a bootstrap.
|
|
466 |
*
|
|
467 |
* Called from the VM.
|
|
468 |
*/
|
|
469 |
@SuppressWarnings({"unused"})
|
|
470 |
private void bootstrapFinished() throws Exception {
|
|
471 |
for (HotSpotVMEventListener vmEventListener : getVmEventListeners()) {
|
|
472 |
vmEventListener.notifyBootstrapFinished();
|
|
473 |
}
|
|
474 |
}
|
|
475 |
|
|
476 |
/**
|
|
477 |
* Notify on successful install into the CodeCache.
|
|
478 |
*
|
|
479 |
* @param hotSpotCodeCacheProvider
|
|
480 |
* @param installedCode
|
|
481 |
* @param compiledCode
|
|
482 |
*/
|
|
483 |
void notifyInstall(HotSpotCodeCacheProvider hotSpotCodeCacheProvider, InstalledCode installedCode, CompiledCode compiledCode) {
|
|
484 |
for (HotSpotVMEventListener vmEventListener : getVmEventListeners()) {
|
|
485 |
vmEventListener.notifyInstall(hotSpotCodeCacheProvider, installedCode, compiledCode);
|
|
486 |
}
|
|
487 |
}
|
|
488 |
|
|
489 |
@SuppressFBWarnings(value = "DM_DEFAULT_ENCODING", justification = "no localization here please!")
|
|
490 |
private static void printConfigLine(CompilerToVM vm, String format, Object... args) {
|
|
491 |
String line = String.format(format, args);
|
|
492 |
byte[] lineBytes = line.getBytes();
|
|
493 |
vm.writeDebugOutput(lineBytes, 0, lineBytes.length);
|
|
494 |
vm.flushDebugOutput();
|
|
495 |
}
|
|
496 |
|
|
497 |
private static void printConfig(HotSpotVMConfigStore store, CompilerToVM vm) {
|
|
498 |
TreeMap<String, VMField> fields = new TreeMap<>(store.getFields());
|
|
499 |
for (VMField field : fields.values()) {
|
|
500 |
if (!field.isStatic()) {
|
|
501 |
printConfigLine(vm, "[vmconfig:instance field] %s %s {offset=%d[0x%x]}%n", field.type, field.name, field.offset, field.offset);
|
|
502 |
} else {
|
|
503 |
String value = field.value == null ? "null" : field.value instanceof Boolean ? field.value.toString() : String.format("%d[0x%x]", field.value, field.value);
|
|
504 |
printConfigLine(vm, "[vmconfig:static field] %s %s = %s {address=0x%x}%n", field.type, field.name, value, field.address);
|
|
505 |
}
|
|
506 |
}
|
|
507 |
TreeMap<String, VMFlag> flags = new TreeMap<>(store.getFlags());
|
|
508 |
for (VMFlag flag : flags.values()) {
|
|
509 |
printConfigLine(vm, "[vmconfig:flag] %s %s = %s%n", flag.type, flag.name, flag.value);
|
|
510 |
}
|
|
511 |
TreeMap<String, Long> addresses = new TreeMap<>(store.getAddresses());
|
|
512 |
for (Map.Entry<String, Long> e : addresses.entrySet()) {
|
|
513 |
printConfigLine(vm, "[vmconfig:address] %s = %d[0x%x]%n", e.getKey(), e.getValue(), e.getValue());
|
|
514 |
}
|
|
515 |
TreeMap<String, Long> constants = new TreeMap<>(store.getConstants());
|
|
516 |
for (Map.Entry<String, Long> e : constants.entrySet()) {
|
|
517 |
printConfigLine(vm, "[vmconfig:constant] %s = %d[0x%x]%n", e.getKey(), e.getValue(), e.getValue());
|
|
518 |
}
|
|
519 |
for (VMIntrinsicMethod e : store.getIntrinsics()) {
|
|
520 |
printConfigLine(vm, "[vmconfig:intrinsic] %d = %s.%s %s%n", e.id, e.declaringClass, e.name, e.descriptor);
|
|
521 |
}
|
|
522 |
}
|
|
523 |
|
|
524 |
public OutputStream getLogStream() {
|
|
525 |
return new OutputStream() {
|
|
526 |
|
|
527 |
@Override
|
|
528 |
public void write(byte[] b, int off, int len) throws IOException {
|
|
529 |
if (b == null) {
|
|
530 |
throw new NullPointerException();
|
|
531 |
} else if (off < 0 || off > b.length || len < 0 || (off + len) > b.length || (off + len) < 0) {
|
|
532 |
throw new IndexOutOfBoundsException();
|
|
533 |
} else if (len == 0) {
|
|
534 |
return;
|
|
535 |
}
|
|
536 |
compilerToVm.writeDebugOutput(b, off, len);
|
|
537 |
}
|
|
538 |
|
|
539 |
@Override
|
|
540 |
public void write(int b) throws IOException {
|
|
541 |
write(new byte[]{(byte) b}, 0, 1);
|
|
542 |
}
|
|
543 |
|
|
544 |
@Override
|
|
545 |
public void flush() throws IOException {
|
|
546 |
compilerToVm.flushDebugOutput();
|
|
547 |
}
|
|
548 |
};
|
|
549 |
}
|
|
550 |
|
|
551 |
/**
|
|
552 |
* Collects the current values of all JVMCI benchmark counters, summed up over all threads.
|
|
553 |
*/
|
|
554 |
public long[] collectCounters() {
|
|
555 |
return compilerToVm.collectCounters();
|
|
556 |
}
|
|
557 |
}
|