author | lagergren |
Fri, 03 May 2013 15:33:54 +0200 | |
changeset 17518 | 2225a4f929c0 |
parent 17513 | b9a691fc1df5 |
child 17519 | 19c9d2553e35 |
permissions | -rw-r--r-- |
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/* |
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* Copyright (c) 2010, 2013, 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. Oracle designates this |
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* particular file as subject to the "Classpath" exception as provided |
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* by Oracle in the LICENSE file that accompanied this code. |
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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.nashorn.internal.runtime; |
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import static jdk.nashorn.internal.codegen.CompilerConstants.RUN_SCRIPT; |
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import static jdk.nashorn.internal.codegen.CompilerConstants.STRICT_MODE; |
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import static jdk.nashorn.internal.lookup.Lookup.MH; |
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import static jdk.nashorn.internal.runtime.ECMAErrors.typeError; |
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import static jdk.nashorn.internal.runtime.ScriptRuntime.UNDEFINED; |
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import java.io.File; |
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import java.io.IOException; |
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import java.io.PrintWriter; |
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import java.lang.invoke.MethodHandle; |
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import java.lang.invoke.MethodHandles; |
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import java.lang.reflect.Constructor; |
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import java.net.MalformedURLException; |
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import java.net.URL; |
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import java.security.AccessControlContext; |
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import java.security.AccessController; |
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import java.security.CodeSigner; |
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import java.security.CodeSource; |
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import java.security.Permissions; |
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import java.security.PrivilegedAction; |
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import java.security.ProtectionDomain; |
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import jdk.internal.org.objectweb.asm.ClassReader; |
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import jdk.internal.org.objectweb.asm.util.CheckClassAdapter; |
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import jdk.nashorn.internal.codegen.Compiler; |
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import jdk.nashorn.internal.codegen.ObjectClassGenerator; |
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import jdk.nashorn.internal.ir.FunctionNode; |
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import jdk.nashorn.internal.ir.debug.ASTWriter; |
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import jdk.nashorn.internal.ir.debug.PrintVisitor; |
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import jdk.nashorn.internal.parser.Parser; |
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import jdk.nashorn.internal.runtime.options.Options; |
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/** |
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* This class manages the global state of execution. Context is immutable. |
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*/ |
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public final class Context { |
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/** |
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* ContextCodeInstaller that has the privilege of installing classes in the Context. |
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* Can only be instantiated from inside the context and is opaque to other classes |
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*/ |
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public static class ContextCodeInstaller implements CodeInstaller<ScriptEnvironment> { |
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private final Context context; |
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private final ScriptLoader loader; |
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private final CodeSource codeSource; |
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private ContextCodeInstaller(final Context context, final ScriptLoader loader, final CodeSource codeSource) { |
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this.context = context; |
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this.loader = loader; |
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this.codeSource = codeSource; |
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} |
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/** |
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* Return the context for this installer |
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* @return ScriptEnvironment |
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*/ |
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@Override |
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public ScriptEnvironment getOwner() { |
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return context.env; |
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} |
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@Override |
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public Class<?> install(final String className, final byte[] bytecode) { |
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return loader.installClass(className, bytecode, codeSource); |
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} |
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@Override |
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public void verify(final byte[] code) { |
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context.verify(code); |
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} |
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} |
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/** Is Context global debug mode enabled ? */ |
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public static final boolean DEBUG = Options.getBooleanProperty("nashorn.debug"); |
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private static final ThreadLocal<ScriptObject> currentGlobal = |
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new ThreadLocal<ScriptObject>() { |
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@Override |
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protected ScriptObject initialValue() { |
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return null; |
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} |
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}; |
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/** |
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* Get the current global scope |
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* @return the current global scope |
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*/ |
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public static ScriptObject getGlobal() { |
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// This class in a package.access protected package. |
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// Trusted code only can call this method. |
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return getGlobalTrusted(); |
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} |
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/** |
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* Set the current global scope |
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* @param global the global scope |
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*/ |
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public static void setGlobal(final ScriptObject global) { |
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final SecurityManager sm = System.getSecurityManager(); |
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if (sm != null) { |
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sm.checkPermission(new RuntimePermission("nashorn.setGlobal")); |
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} |
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if (global != null && !(global instanceof GlobalObject)) { |
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throw new IllegalArgumentException("global does not implement GlobalObject!"); |
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} |
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setGlobalTrusted(global); |
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} |
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/** |
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* Get context of the current global |
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* @return current global scope's context. |
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*/ |
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public static Context getContext() { |
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final SecurityManager sm = System.getSecurityManager(); |
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if (sm != null) { |
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sm.checkPermission(new RuntimePermission("nashorn.getContext")); |
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} |
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return getContextTrusted(); |
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} |
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/** |
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* Get current context's error writer |
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* |
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* @return error writer of the current context |
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*/ |
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public static PrintWriter getCurrentErr() { |
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final ScriptObject global = getGlobalTrusted(); |
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return (global != null)? global.getContext().getErr() : new PrintWriter(System.err); |
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} |
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/** |
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* Output text to this Context's error stream |
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* @param str text to write |
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*/ |
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public static void err(final String str) { |
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err(str, true); |
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} |
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/** |
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* Output text to this Context's error stream, optionally with |
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* a newline afterwards |
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* |
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* @param str text to write |
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* @param crlf write a carriage return/new line after text |
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*/ |
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@SuppressWarnings("resource") |
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public static void err(final String str, final boolean crlf) { |
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final PrintWriter err = Context.getCurrentErr(); |
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if (err != null) { |
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if (crlf) { |
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err.println(str); |
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} else { |
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err.print(str); |
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} |
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} |
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} |
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/** Current environment. */ |
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private final ScriptEnvironment env; |
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/** is this context in strict mode? Cached from env. as this is used heavily. */ |
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public final boolean _strict; |
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/** class loader to resolve classes from script. */ |
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private final ClassLoader appLoader; |
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/** Class loader to load classes from -classpath option, if set. */ |
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private final ClassLoader classPathLoader; |
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/** Class loader to load classes compiled from scripts. */ |
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private final ScriptLoader scriptLoader; |
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/** Current error manager. */ |
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private final ErrorManager errors; |
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private static final ClassLoader myLoader = Context.class.getClassLoader(); |
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private static final StructureLoader sharedLoader; |
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static { |
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sharedLoader = AccessController.doPrivileged(new PrivilegedAction<StructureLoader>() { |
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@Override |
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public StructureLoader run() { |
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return new StructureLoader(myLoader, null); |
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} |
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}); |
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} |
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/** |
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* ThrowErrorManager that throws ParserException upon error conditions. |
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*/ |
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public static class ThrowErrorManager extends ErrorManager { |
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@Override |
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public void error(final String message) { |
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throw new ParserException(message); |
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} |
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@Override |
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public void error(final ParserException e) { |
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throw e; |
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} |
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} |
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/** |
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* Constructor |
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* |
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* @param options options from command line or Context creator |
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* @param errors error manger |
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* @param appLoader application class loader |
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*/ |
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public Context(final Options options, final ErrorManager errors, final ClassLoader appLoader) { |
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this(options, errors, new PrintWriter(System.out, true), new PrintWriter(System.err, true), appLoader); |
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} |
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/** |
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* Constructor |
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* |
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* @param options options from command line or Context creator |
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* @param errors error manger |
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* @param out output writer for this Context |
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* @param err error writer for this Context |
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* @param appLoader application class loader |
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*/ |
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public Context(final Options options, final ErrorManager errors, final PrintWriter out, final PrintWriter err, final ClassLoader appLoader) { |
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final SecurityManager sm = System.getSecurityManager(); |
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if (sm != null) { |
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sm.checkPermission(new RuntimePermission("nashorn.createContext")); |
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} |
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this.env = new ScriptEnvironment(options, out, err); |
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this._strict = env._strict; |
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this.appLoader = appLoader; |
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this.scriptLoader = (ScriptLoader)AccessController.doPrivileged( |
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new PrivilegedAction<ClassLoader>() { |
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@Override |
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public ClassLoader run() { |
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final StructureLoader structureLoader = new StructureLoader(sharedLoader, Context.this); |
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return new ScriptLoader(structureLoader, Context.this); |
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} |
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}); |
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this.errors = errors; |
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// if user passed -classpath option, make a class loader with that and set it as |
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// thread context class loader so that script can access classes from that path. |
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final String classPath = options.getString("classpath"); |
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if (! env._compile_only && classPath != null && !classPath.isEmpty()) { |
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// make sure that caller can create a class loader. |
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if (sm != null) { |
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sm.checkPermission(new RuntimePermission("createClassLoader")); |
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} |
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this.classPathLoader = NashornLoader.createClassLoader(classPath); |
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} else { |
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this.classPathLoader = null; |
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} |
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// print version info if asked. |
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if (env._version) { |
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getErr().println("nashorn " + Version.version()); |
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} |
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if (env._fullversion) { |
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getErr().println("nashorn full version " + Version.fullVersion()); |
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} |
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} |
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/** |
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* Get the error manager for this context |
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* @return error manger |
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*/ |
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public ErrorManager getErrorManager() { |
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return errors; |
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} |
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/** |
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* Get the script environment for this context |
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* @return script environment |
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*/ |
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|
305 |
public ScriptEnvironment getEnv() { |
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diff
changeset
|
306 |
return env; |
75513555e603
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changeset
|
307 |
} |
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changeset
|
308 |
|
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changeset
|
309 |
/** |
16147 | 310 |
* Get the output stream for this context |
311 |
* @return output print writer |
|
312 |
*/ |
|
313 |
public PrintWriter getOut() { |
|
16262
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changeset
|
314 |
return env.getOut(); |
16147 | 315 |
} |
316 |
||
317 |
/** |
|
318 |
* Get the error stream for this context |
|
319 |
* @return error print writer |
|
320 |
*/ |
|
321 |
public PrintWriter getErr() { |
|
16262
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changeset
|
322 |
return env.getErr(); |
16147 | 323 |
} |
324 |
||
16201
889ddb179cdf
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changeset
|
325 |
/** |
16188 | 326 |
* Get the PropertyMap of the current global scope |
327 |
* @return the property map of the current global scope |
|
328 |
*/ |
|
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|
329 |
public static PropertyMap getGlobalMap() { |
16188 | 330 |
return Context.getGlobalTrusted().getMap(); |
331 |
} |
|
332 |
||
16147 | 333 |
/** |
334 |
* Compile a top level script. |
|
335 |
* |
|
336 |
* @param source the source |
|
337 |
* @param scope the scope |
|
338 |
* |
|
339 |
* @return top level function for script |
|
340 |
*/ |
|
16230
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|
341 |
public ScriptFunction compileScript(final Source source, final ScriptObject scope) { |
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|
342 |
return compileScript(source, scope, this.errors); |
16147 | 343 |
} |
344 |
||
345 |
/** |
|
346 |
* Entry point for {@code eval} |
|
347 |
* |
|
348 |
* @param initialScope The scope of this eval call |
|
349 |
* @param string Evaluated code as a String |
|
350 |
* @param callThis "this" to be passed to the evaluated code |
|
351 |
* @param location location of the eval call |
|
352 |
* @param strict is this {@code eval} call from a strict mode code? |
|
353 |
* |
|
354 |
* @return the return value of the {@code eval} |
|
355 |
*/ |
|
356 |
public Object eval(final ScriptObject initialScope, final String string, final Object callThis, final Object location, final boolean strict) { |
|
357 |
final String file = (location == UNDEFINED || location == null) ? "<eval>" : location.toString(); |
|
358 |
final Source source = new Source(file, string); |
|
359 |
final boolean directEval = location != UNDEFINED; // is this direct 'eval' call or indirectly invoked eval? |
|
16188 | 360 |
final ScriptObject global = Context.getGlobalTrusted(); |
16147 | 361 |
|
362 |
ScriptObject scope = initialScope; |
|
363 |
||
364 |
// ECMA section 10.1.1 point 2 says eval code is strict if it begins |
|
365 |
// with "use strict" directive or eval direct call itself is made |
|
366 |
// from from strict mode code. We are passed with caller's strict mode. |
|
367 |
boolean strictFlag = directEval && strict; |
|
368 |
||
369 |
Class<?> clazz = null; |
|
370 |
try { |
|
371 |
clazz = compile(source, new ThrowErrorManager(), strictFlag); |
|
372 |
} catch (final ParserException e) { |
|
373 |
e.throwAsEcmaException(global); |
|
374 |
return null; |
|
375 |
} |
|
376 |
||
377 |
if (!strictFlag) { |
|
378 |
// We need to get strict mode flag from compiled class. This is |
|
379 |
// because eval code may start with "use strict" directive. |
|
380 |
try { |
|
17233 | 381 |
strictFlag = clazz.getField(STRICT_MODE.symbolName()).getBoolean(null); |
16147 | 382 |
} catch (final NoSuchFieldException | SecurityException | IllegalArgumentException | IllegalAccessException e) { |
383 |
//ignored |
|
384 |
strictFlag = false; |
|
385 |
} |
|
386 |
} |
|
387 |
||
388 |
// In strict mode, eval does not instantiate variables and functions |
|
389 |
// in the caller's environment. A new environment is created! |
|
390 |
if (strictFlag) { |
|
391 |
// Create a new scope object |
|
392 |
final ScriptObject strictEvalScope = ((GlobalObject)global).newObject(); |
|
393 |
||
394 |
// bless it as a "scope" |
|
395 |
strictEvalScope.setIsScope(); |
|
396 |
||
397 |
// set given scope to be it's proto so that eval can still |
|
398 |
// access caller environment vars in the new environment. |
|
399 |
strictEvalScope.setProto(scope); |
|
400 |
scope = strictEvalScope; |
|
401 |
} |
|
402 |
||
403 |
ScriptFunction func = getRunScriptFunction(clazz, scope); |
|
404 |
Object evalThis; |
|
405 |
if (directEval) { |
|
406 |
evalThis = (callThis instanceof ScriptObject || strictFlag) ? callThis : global; |
|
407 |
} else { |
|
408 |
evalThis = global; |
|
409 |
} |
|
410 |
||
411 |
return ScriptRuntime.apply(func, evalThis); |
|
412 |
} |
|
413 |
||
17518
2225a4f929c0
8013477: Node.setSymbol needs to be copy on write - enable IR snapshots for recompilation based on callsite type specialization. [not enabled by default, hidden by a flag for now]
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17513
diff
changeset
|
414 |
private static Source loadInternal(final String srcStr, final String prefix, final String resourcePath) { |
17244 | 415 |
if (srcStr.startsWith(prefix)) { |
416 |
final String resource = resourcePath + srcStr.substring(prefix.length()); |
|
417 |
// NOTE: even sandbox scripts should be able to load scripts in nashorn: scheme |
|
418 |
// These scripts are always available and are loaded from nashorn.jar's resources. |
|
419 |
return AccessController.doPrivileged( |
|
420 |
new PrivilegedAction<Source>() { |
|
421 |
@Override |
|
422 |
public Source run() { |
|
423 |
try { |
|
424 |
final URL resURL = Context.class.getResource(resource); |
|
425 |
return (resURL != null)? new Source(srcStr, resURL) : null; |
|
426 |
} catch (final IOException exp) { |
|
427 |
return null; |
|
428 |
} |
|
429 |
} |
|
430 |
}); |
|
431 |
} |
|
432 |
||
433 |
return null; |
|
434 |
} |
|
435 |
||
16147 | 436 |
/** |
437 |
* Implementation of {@code load} Nashorn extension. Load a script file from a source |
|
438 |
* expression |
|
439 |
* |
|
440 |
* @param scope the scope |
|
16230
c38c724d82e7
8008103: Source object should maintain URL of the script source as a private field
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diff
changeset
|
441 |
* @param from source expression for script |
16147 | 442 |
* |
443 |
* @return return value for load call (undefined) |
|
444 |
* |
|
445 |
* @throws IOException if source cannot be found or loaded |
|
446 |
*/ |
|
16230
c38c724d82e7
8008103: Source object should maintain URL of the script source as a private field
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diff
changeset
|
447 |
public Object load(final ScriptObject scope, final Object from) throws IOException { |
17244 | 448 |
final Object src = (from instanceof ConsString)? from.toString() : from; |
16230
c38c724d82e7
8008103: Source object should maintain URL of the script source as a private field
sundar
parents:
16226
diff
changeset
|
449 |
Source source = null; |
16147 | 450 |
|
16230
c38c724d82e7
8008103: Source object should maintain URL of the script source as a private field
sundar
parents:
16226
diff
changeset
|
451 |
// load accepts a String (which could be a URL or a file name), a File, a URL |
c38c724d82e7
8008103: Source object should maintain URL of the script source as a private field
sundar
parents:
16226
diff
changeset
|
452 |
// or a ScriptObject that has "name" and "source" (string valued) properties. |
16147 | 453 |
if (src instanceof String) { |
16251
4a5d15b2f168
8008166: URL handling was broken on windows, causing "load" to malfunction
lagergren
parents:
16245
diff
changeset
|
454 |
final String srcStr = (String)src; |
17244 | 455 |
final File file = new File(srcStr); |
16230
c38c724d82e7
8008103: Source object should maintain URL of the script source as a private field
sundar
parents:
16226
diff
changeset
|
456 |
if (srcStr.indexOf(':') != -1) { |
17244 | 457 |
if ((source = loadInternal(srcStr, "nashorn:", "resources/")) == null && |
458 |
(source = loadInternal(srcStr, "fx:", "resources/fx/")) == null) { |
|
459 |
URL url; |
|
16254 | 460 |
try { |
461 |
//check for malformed url. if malformed, it may still be a valid file |
|
462 |
url = new URL(srcStr); |
|
463 |
} catch (final MalformedURLException e) { |
|
464 |
url = file.toURI().toURL(); |
|
465 |
} |
|
16230
c38c724d82e7
8008103: Source object should maintain URL of the script source as a private field
sundar
parents:
16226
diff
changeset
|
466 |
source = new Source(url.toString(), url); |
16147 | 467 |
} |
16221
38ac51eba133
8007715: Make sure that not all tests run with AllPermission
sundar
parents:
16211
diff
changeset
|
468 |
} else if (file.isFile()) { |
16230
c38c724d82e7
8008103: Source object should maintain URL of the script source as a private field
sundar
parents:
16226
diff
changeset
|
469 |
source = new Source(srcStr, file); |
16147 | 470 |
} |
16230
c38c724d82e7
8008103: Source object should maintain URL of the script source as a private field
sundar
parents:
16226
diff
changeset
|
471 |
} else if (src instanceof File && ((File)src).isFile()) { |
c38c724d82e7
8008103: Source object should maintain URL of the script source as a private field
sundar
parents:
16226
diff
changeset
|
472 |
final File file = (File)src; |
c38c724d82e7
8008103: Source object should maintain URL of the script source as a private field
sundar
parents:
16226
diff
changeset
|
473 |
source = new Source(file.getName(), file); |
16147 | 474 |
} else if (src instanceof URL) { |
16230
c38c724d82e7
8008103: Source object should maintain URL of the script source as a private field
sundar
parents:
16226
diff
changeset
|
475 |
final URL url = (URL)src; |
c38c724d82e7
8008103: Source object should maintain URL of the script source as a private field
sundar
parents:
16226
diff
changeset
|
476 |
source = new Source(url.toString(), url); |
16147 | 477 |
} else if (src instanceof ScriptObject) { |
478 |
final ScriptObject sobj = (ScriptObject)src; |
|
479 |
if (sobj.has("script") && sobj.has("name")) { |
|
480 |
final String script = JSType.toString(sobj.get("script")); |
|
481 |
final String name = JSType.toString(sobj.get("name")); |
|
16230
c38c724d82e7
8008103: Source object should maintain URL of the script source as a private field
sundar
parents:
16226
diff
changeset
|
482 |
source = new Source(name, script); |
16147 | 483 |
} |
484 |
} |
|
485 |
||
16230
c38c724d82e7
8008103: Source object should maintain URL of the script source as a private field
sundar
parents:
16226
diff
changeset
|
486 |
if (source != null) { |
c38c724d82e7
8008103: Source object should maintain URL of the script source as a private field
sundar
parents:
16226
diff
changeset
|
487 |
return evaluateSource(source, scope, scope); |
c38c724d82e7
8008103: Source object should maintain URL of the script source as a private field
sundar
parents:
16226
diff
changeset
|
488 |
} |
c38c724d82e7
8008103: Source object should maintain URL of the script source as a private field
sundar
parents:
16226
diff
changeset
|
489 |
|
16256
f2d9a0c49914
8007002: Replace implicit exception throwing methods with explicit throws - simplify control flow and remove useless code
lagergren
parents:
16254
diff
changeset
|
490 |
throw typeError("cant.load.script", ScriptRuntime.safeToString(from)); |
16147 | 491 |
} |
492 |
||
493 |
/** |
|
494 |
* Load or get a structure class. Structure class names are based on the number of parameter fields |
|
495 |
* and {@link AccessorProperty} fields in them. Structure classes are used to represent ScriptObjects |
|
496 |
* |
|
497 |
* @see ObjectClassGenerator |
|
498 |
* @see AccessorProperty |
|
499 |
* @see ScriptObject |
|
500 |
* |
|
16275 | 501 |
* @param fullName full name of class, e.g. jdk.nashorn.internal.objects.JO2P1 contains 2 fields and 1 parameter. |
16147 | 502 |
* |
16272 | 503 |
* @return the {@code Class<?>} for this structure |
16147 | 504 |
* |
505 |
* @throws ClassNotFoundException if structure class cannot be resolved |
|
506 |
*/ |
|
507 |
public static Class<?> forStructureClass(final String fullName) throws ClassNotFoundException { |
|
508 |
return Class.forName(fullName, true, sharedLoader); |
|
509 |
} |
|
510 |
||
511 |
/** |
|
512 |
* Lookup a Java class. This is used for JSR-223 stuff linking in from |
|
513 |
* {@link jdk.nashorn.internal.objects.NativeJava} and {@link jdk.nashorn.internal.runtime.NativeJavaPackage} |
|
514 |
* |
|
515 |
* @param fullName full name of class to load |
|
516 |
* |
|
16272 | 517 |
* @return the {@code Class<?>} for the name |
16147 | 518 |
* |
519 |
* @throws ClassNotFoundException if class cannot be resolved |
|
520 |
*/ |
|
521 |
public Class<?> findClass(final String fullName) throws ClassNotFoundException { |
|
522 |
// check package access as soon as possible! |
|
523 |
final int index = fullName.lastIndexOf('.'); |
|
524 |
if (index != -1) { |
|
525 |
final SecurityManager sm = System.getSecurityManager(); |
|
526 |
if (sm != null) { |
|
16522 | 527 |
AccessController.doPrivileged(new PrivilegedAction<Void>() { |
528 |
@Override |
|
529 |
public Void run() { |
|
530 |
sm.checkPackageAccess(fullName.substring(0, index)); |
|
531 |
return null; |
|
532 |
} |
|
533 |
}, createNoPermissionsContext()); |
|
16147 | 534 |
} |
535 |
} |
|
536 |
||
16185 | 537 |
// try the script -classpath loader, if that is set |
16147 | 538 |
if (classPathLoader != null) { |
539 |
try { |
|
540 |
return Class.forName(fullName, true, classPathLoader); |
|
16185 | 541 |
} catch (final ClassNotFoundException ignored) { |
16147 | 542 |
// ignore, continue search |
543 |
} |
|
544 |
} |
|
545 |
||
16185 | 546 |
// Try finding using the "app" loader. |
547 |
return Class.forName(fullName, true, appLoader); |
|
16147 | 548 |
} |
549 |
||
550 |
/** |
|
551 |
* Hook to print stack trace for a {@link Throwable} that occurred during |
|
552 |
* execution |
|
553 |
* |
|
554 |
* @param t throwable for which to dump stack |
|
555 |
*/ |
|
556 |
public static void printStackTrace(final Throwable t) { |
|
557 |
if (Context.DEBUG) { |
|
16185 | 558 |
t.printStackTrace(Context.getCurrentErr()); |
16147 | 559 |
} |
560 |
} |
|
561 |
||
562 |
/** |
|
563 |
* Verify generated bytecode before emission. This is called back from the |
|
16262
75513555e603
8008731: Separate configuration environment (options, error/output writer etc.) from Context
sundar
parents:
16256
diff
changeset
|
564 |
* {@link ObjectClassGenerator} or the {@link Compiler}. If the "--verify-code" parameter |
16147 | 565 |
* hasn't been given, this is a nop |
566 |
* |
|
567 |
* Note that verification may load classes -- we don't want to do that unless |
|
568 |
* user specified verify option. We check it here even though caller |
|
569 |
* may have already checked that flag |
|
570 |
* |
|
571 |
* @param bytecode bytecode to verify |
|
572 |
*/ |
|
573 |
public void verify(final byte[] bytecode) { |
|
16262
75513555e603
8008731: Separate configuration environment (options, error/output writer etc.) from Context
sundar
parents:
16256
diff
changeset
|
574 |
if (env._verify_code) { |
16147 | 575 |
// No verification when security manager is around as verifier |
576 |
// may load further classes - which should be avoided. |
|
577 |
if (System.getSecurityManager() == null) { |
|
578 |
CheckClassAdapter.verify(new ClassReader(bytecode), scriptLoader, false, new PrintWriter(System.err, true)); |
|
579 |
} |
|
580 |
} |
|
581 |
} |
|
582 |
||
583 |
/** |
|
16211 | 584 |
* Create and initialize a new global scope object. |
585 |
* |
|
586 |
* @return the initialized global scope object. |
|
587 |
*/ |
|
588 |
public ScriptObject createGlobal() { |
|
589 |
return initGlobal(newGlobal()); |
|
590 |
} |
|
591 |
||
592 |
/** |
|
593 |
* Create a new uninitialized global scope object |
|
16147 | 594 |
* @return the global script object |
595 |
*/ |
|
16211 | 596 |
public ScriptObject newGlobal() { |
16185 | 597 |
final SecurityManager sm = System.getSecurityManager(); |
598 |
if (sm != null) { |
|
16522 | 599 |
sm.checkPermission(new RuntimePermission("nashorn.newGlobal")); |
16185 | 600 |
} |
601 |
||
16211 | 602 |
return newGlobalTrusted(); |
603 |
} |
|
604 |
||
605 |
/** |
|
606 |
* Initialize given global scope object. |
|
607 |
* |
|
16233
95d3e01c04c3
8008199: Lazy compilation and trampoline implementation
lagergren
parents:
16230
diff
changeset
|
608 |
* @param global the global |
16211 | 609 |
* @return the initialized global scope object. |
610 |
*/ |
|
611 |
public ScriptObject initGlobal(final ScriptObject global) { |
|
612 |
if (! (global instanceof GlobalObject)) { |
|
613 |
throw new IllegalArgumentException("not a global object!"); |
|
614 |
} |
|
615 |
||
16147 | 616 |
// Need only minimal global object, if we are just compiling. |
16262
75513555e603
8008731: Separate configuration environment (options, error/output writer etc.) from Context
sundar
parents:
16256
diff
changeset
|
617 |
if (!env._compile_only) { |
16188 | 618 |
final ScriptObject oldGlobal = Context.getGlobalTrusted(); |
16185 | 619 |
try { |
16188 | 620 |
Context.setGlobalTrusted(global); |
16185 | 621 |
// initialize global scope with builtin global objects |
622 |
((GlobalObject)global).initBuiltinObjects(); |
|
623 |
} finally { |
|
16188 | 624 |
Context.setGlobalTrusted(oldGlobal); |
16185 | 625 |
} |
16147 | 626 |
} |
627 |
||
628 |
return global; |
|
629 |
} |
|
630 |
||
631 |
/** |
|
16188 | 632 |
* Trusted variants - package-private |
633 |
*/ |
|
634 |
||
635 |
/** |
|
636 |
* Return the current global scope |
|
637 |
* @return current global scope |
|
638 |
*/ |
|
639 |
static ScriptObject getGlobalTrusted() { |
|
640 |
return currentGlobal.get(); |
|
641 |
} |
|
642 |
||
643 |
/** |
|
644 |
* Set the current global scope |
|
645 |
*/ |
|
646 |
static void setGlobalTrusted(ScriptObject global) { |
|
647 |
currentGlobal.set(global); |
|
648 |
} |
|
649 |
||
650 |
/** |
|
651 |
* Return the current global's context |
|
652 |
* @return current global's context |
|
16185 | 653 |
*/ |
654 |
static Context getContextTrusted() { |
|
16188 | 655 |
return Context.getGlobalTrusted().getContext(); |
16185 | 656 |
} |
657 |
||
658 |
/** |
|
16147 | 659 |
* Try to infer Context instance from the Class. If we cannot, |
660 |
* then get it from the thread local variable. |
|
661 |
* |
|
662 |
* @param clazz the class |
|
663 |
* @return context |
|
664 |
*/ |
|
665 |
static Context fromClass(final Class<?> clazz) { |
|
666 |
final ClassLoader loader = clazz.getClassLoader(); |
|
667 |
||
668 |
Context context = null; |
|
669 |
if (loader instanceof NashornLoader) { |
|
670 |
context = ((NashornLoader)loader).getContext(); |
|
671 |
} |
|
672 |
||
16185 | 673 |
return (context != null) ? context : Context.getContextTrusted(); |
16147 | 674 |
} |
675 |
||
16522 | 676 |
private static AccessControlContext createNoPermissionsContext() { |
677 |
return new AccessControlContext(new ProtectionDomain[] { new ProtectionDomain(null, new Permissions()) }); |
|
678 |
} |
|
679 |
||
16147 | 680 |
private Object evaluateSource(final Source source, final ScriptObject scope, final ScriptObject thiz) { |
681 |
ScriptFunction script = null; |
|
682 |
||
683 |
try { |
|
16230
c38c724d82e7
8008103: Source object should maintain URL of the script source as a private field
sundar
parents:
16226
diff
changeset
|
684 |
script = compileScript(source, scope, new Context.ThrowErrorManager()); |
16147 | 685 |
} catch (final ParserException e) { |
16188 | 686 |
e.throwAsEcmaException(); |
16147 | 687 |
} |
688 |
||
689 |
return ScriptRuntime.apply(script, thiz); |
|
690 |
} |
|
691 |
||
692 |
private static ScriptFunction getRunScriptFunction(final Class<?> script, final ScriptObject scope) { |
|
693 |
if (script == null) { |
|
694 |
return null; |
|
695 |
} |
|
696 |
||
697 |
// Get run method - the entry point to the script |
|
698 |
final MethodHandle runMethodHandle = |
|
699 |
MH.findStatic( |
|
700 |
MethodHandles.lookup(), |
|
701 |
script, |
|
17233 | 702 |
RUN_SCRIPT.symbolName(), |
16147 | 703 |
MH.type( |
704 |
Object.class, |
|
16225
81d58c2b9fcf
8006943: Fix order of function method arguments to be (callee, thisObject)
attila
parents:
16221
diff
changeset
|
705 |
ScriptFunction.class, |
81d58c2b9fcf
8006943: Fix order of function method arguments to be (callee, thisObject)
attila
parents:
16221
diff
changeset
|
706 |
Object.class)); |
16147 | 707 |
|
708 |
boolean strict; |
|
709 |
||
710 |
try { |
|
17233 | 711 |
strict = script.getField(STRICT_MODE.symbolName()).getBoolean(null); |
16147 | 712 |
} catch (final NoSuchFieldException | SecurityException | IllegalArgumentException | IllegalAccessException e) { |
713 |
strict = false; |
|
714 |
} |
|
715 |
||
716 |
// Package as a JavaScript function and pass function back to shell. |
|
17233 | 717 |
return ((GlobalObject)Context.getGlobalTrusted()).newScriptFunction(RUN_SCRIPT.symbolName(), runMethodHandle, scope, strict); |
16147 | 718 |
} |
719 |
||
16230
c38c724d82e7
8008103: Source object should maintain URL of the script source as a private field
sundar
parents:
16226
diff
changeset
|
720 |
private ScriptFunction compileScript(final Source source, final ScriptObject scope, final ErrorManager errMan) { |
c38c724d82e7
8008103: Source object should maintain URL of the script source as a private field
sundar
parents:
16226
diff
changeset
|
721 |
return getRunScriptFunction(compile(source, errMan, this._strict), scope); |
16147 | 722 |
} |
723 |
||
16230
c38c724d82e7
8008103: Source object should maintain URL of the script source as a private field
sundar
parents:
16226
diff
changeset
|
724 |
private synchronized Class<?> compile(final Source source, final ErrorManager errMan, final boolean strict) { |
16147 | 725 |
// start with no errors, no warnings. |
726 |
errMan.reset(); |
|
727 |
||
728 |
GlobalObject global = null; |
|
729 |
Class<?> script; |
|
730 |
||
16262
75513555e603
8008731: Separate configuration environment (options, error/output writer etc.) from Context
sundar
parents:
16256
diff
changeset
|
731 |
if (env._class_cache_size > 0) { |
16188 | 732 |
global = (GlobalObject)Context.getGlobalTrusted(); |
16147 | 733 |
script = global.findCachedClass(source); |
734 |
if (script != null) { |
|
17233 | 735 |
Compiler.LOG.fine("Code cache hit for ", source, " avoiding recompile."); |
16147 | 736 |
return script; |
737 |
} |
|
738 |
} |
|
739 |
||
16262
75513555e603
8008731: Separate configuration environment (options, error/output writer etc.) from Context
sundar
parents:
16256
diff
changeset
|
740 |
final FunctionNode functionNode = new Parser(env, source, errMan, strict).parse(); |
17233 | 741 |
if (errors.hasErrors()) { |
16147 | 742 |
return null; |
743 |
} |
|
744 |
||
16262
75513555e603
8008731: Separate configuration environment (options, error/output writer etc.) from Context
sundar
parents:
16256
diff
changeset
|
745 |
if (env._print_ast) { |
16240
e1468b33e201
8008239: Unpublicized parts of the code generator package that were only package internal.
lagergren
parents:
16233
diff
changeset
|
746 |
getErr().println(new ASTWriter(functionNode)); |
e1468b33e201
8008239: Unpublicized parts of the code generator package that were only package internal.
lagergren
parents:
16233
diff
changeset
|
747 |
} |
e1468b33e201
8008239: Unpublicized parts of the code generator package that were only package internal.
lagergren
parents:
16233
diff
changeset
|
748 |
|
16262
75513555e603
8008731: Separate configuration environment (options, error/output writer etc.) from Context
sundar
parents:
16256
diff
changeset
|
749 |
if (env._print_parse) { |
16233
95d3e01c04c3
8008199: Lazy compilation and trampoline implementation
lagergren
parents:
16230
diff
changeset
|
750 |
getErr().println(new PrintVisitor(functionNode)); |
95d3e01c04c3
8008199: Lazy compilation and trampoline implementation
lagergren
parents:
16230
diff
changeset
|
751 |
} |
95d3e01c04c3
8008199: Lazy compilation and trampoline implementation
lagergren
parents:
16230
diff
changeset
|
752 |
|
17233 | 753 |
if (env._parse_only) { |
754 |
return null; |
|
755 |
} |
|
756 |
||
16233
95d3e01c04c3
8008199: Lazy compilation and trampoline implementation
lagergren
parents:
16230
diff
changeset
|
757 |
final URL url = source.getURL(); |
16262
75513555e603
8008731: Separate configuration environment (options, error/output writer etc.) from Context
sundar
parents:
16256
diff
changeset
|
758 |
final ScriptLoader loader = env._loader_per_compile ? createNewLoader() : scriptLoader; |
16147 | 759 |
final CodeSource cs = url == null ? null : new CodeSource(url, (CodeSigner[])null); |
16262
75513555e603
8008731: Separate configuration environment (options, error/output writer etc.) from Context
sundar
parents:
16256
diff
changeset
|
760 |
final CodeInstaller<ScriptEnvironment> installer = new ContextCodeInstaller(this, loader, cs); |
16147 | 761 |
|
17518
2225a4f929c0
8013477: Node.setSymbol needs to be copy on write - enable IR snapshots for recompilation based on callsite type specialization. [not enabled by default, hidden by a flag for now]
lagergren
parents:
17513
diff
changeset
|
762 |
final Compiler compiler = new Compiler(installer, strict); |
16233
95d3e01c04c3
8008199: Lazy compilation and trampoline implementation
lagergren
parents:
16230
diff
changeset
|
763 |
|
17518
2225a4f929c0
8013477: Node.setSymbol needs to be copy on write - enable IR snapshots for recompilation based on callsite type specialization. [not enabled by default, hidden by a flag for now]
lagergren
parents:
17513
diff
changeset
|
764 |
final FunctionNode newFunctionNode = compiler.compile(functionNode); |
2225a4f929c0
8013477: Node.setSymbol needs to be copy on write - enable IR snapshots for recompilation based on callsite type specialization. [not enabled by default, hidden by a flag for now]
lagergren
parents:
17513
diff
changeset
|
765 |
script = compiler.install(newFunctionNode); |
16147 | 766 |
|
767 |
if (global != null) { |
|
768 |
global.cacheClass(source, script); |
|
769 |
} |
|
770 |
||
771 |
return script; |
|
772 |
} |
|
773 |
||
774 |
private ScriptLoader createNewLoader() { |
|
775 |
return AccessController.doPrivileged( |
|
776 |
new PrivilegedAction<ScriptLoader>() { |
|
777 |
@Override |
|
778 |
public ScriptLoader run() { |
|
779 |
// Generated code won't refer to any class generated by context |
|
780 |
// script loader and so parent loader can be the structure |
|
781 |
// loader -- which is parent of the context script loader. |
|
16226
0e4f37e6cc40
8007915: Nashorn IR, codegen, parser packages and Context instance should be inaccessible to user code
sundar
parents:
16225
diff
changeset
|
782 |
return new ScriptLoader((StructureLoader)scriptLoader.getParent(), Context.this); |
16147 | 783 |
} |
784 |
}); |
|
785 |
} |
|
786 |
||
16211 | 787 |
private ScriptObject newGlobalTrusted() { |
16147 | 788 |
try { |
789 |
final Class<?> clazz = Class.forName("jdk.nashorn.internal.objects.Global", true, scriptLoader); |
|
16233
95d3e01c04c3
8008199: Lazy compilation and trampoline implementation
lagergren
parents:
16230
diff
changeset
|
790 |
final Constructor<?> cstr = clazz.getConstructor(Context.class); |
16226
0e4f37e6cc40
8007915: Nashorn IR, codegen, parser packages and Context instance should be inaccessible to user code
sundar
parents:
16225
diff
changeset
|
791 |
return (ScriptObject) cstr.newInstance(this); |
0e4f37e6cc40
8007915: Nashorn IR, codegen, parser packages and Context instance should be inaccessible to user code
sundar
parents:
16225
diff
changeset
|
792 |
} catch (final Exception e) { |
16147 | 793 |
printStackTrace(e); |
16226
0e4f37e6cc40
8007915: Nashorn IR, codegen, parser packages and Context instance should be inaccessible to user code
sundar
parents:
16225
diff
changeset
|
794 |
if (e instanceof RuntimeException) { |
0e4f37e6cc40
8007915: Nashorn IR, codegen, parser packages and Context instance should be inaccessible to user code
sundar
parents:
16225
diff
changeset
|
795 |
throw (RuntimeException)e; |
0e4f37e6cc40
8007915: Nashorn IR, codegen, parser packages and Context instance should be inaccessible to user code
sundar
parents:
16225
diff
changeset
|
796 |
} |
16233
95d3e01c04c3
8008199: Lazy compilation and trampoline implementation
lagergren
parents:
16230
diff
changeset
|
797 |
throw new RuntimeException(e); |
16147 | 798 |
} |
799 |
} |
|
800 |
} |