--- old/src/java.xml.bind/share/classes/com/sun/xml/internal/bind/v2/runtime/reflect/opt/Injector.java 2018-01-30 20:34:37.000000000 -0500
+++ /dev/null 2018-01-30 20:34:37.000000000 -0500
@@ -1,350 +0,0 @@
-/*
- * Copyright (c) 1997, 2017, 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. Oracle designates this
- * particular file as subject to the "Classpath" exception as provided
- * by Oracle in the LICENSE file that accompanied this code.
- *
- * 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 com.sun.xml.internal.bind.v2.runtime.reflect.opt;
-
-import java.lang.reflect.InvocationTargetException;
-import java.lang.reflect.Method;
-import java.lang.ref.WeakReference;
-import java.security.AccessController;
-import java.security.PrivilegedAction;
-import java.util.concurrent.locks.Lock;
-import java.util.concurrent.locks.ReentrantReadWriteLock;
-import java.util.HashMap;
-import java.util.Map;
-import java.util.WeakHashMap;
-import java.util.logging.Level;
-import java.util.logging.Logger;
-
-import com.sun.xml.internal.bind.Util;
-import com.sun.xml.internal.bind.v2.runtime.reflect.Accessor;
-import java.lang.reflect.Field;
-import java.security.CodeSource;
-import java.security.PrivilegedActionException;
-import java.security.PrivilegedExceptionAction;
-import java.security.ProtectionDomain;
-
-/**
- * A {@link ClassLoader} used to "inject" optimized accessor classes
- * into the VM.
- *
- *
- * Its parent class loader needs to be set to the one that can see the user
- * class.
- *
- * @author Kohsuke Kawaguchi
- */
-final class Injector {
-
- /**
- * {@link Injector}s keyed by their parent {@link ClassLoader}.
- *
- * We only need one injector per one user class loader.
- */
- private static final ReentrantReadWriteLock irwl = new ReentrantReadWriteLock();
- private static final Lock ir = irwl.readLock();
- private static final Lock iw = irwl.writeLock();
- private static final Map> injectors =
- new WeakHashMap>();
- private static final Logger logger = Util.getClassLogger();
-
- /**
- * Injects a new class into the given class loader.
- *
- * @return null
- * if it fails to inject.
- */
- static Class inject(ClassLoader cl, String className, byte[] image) {
- Injector injector = get(cl);
- if (injector != null) {
- return injector.inject(className, image);
- } else {
- return null;
- }
- }
-
- /**
- * Returns the already injected class, or null.
- */
- static Class find(ClassLoader cl, String className) {
- Injector injector = get(cl);
- if (injector != null) {
- return injector.find(className);
- } else {
- return null;
- }
- }
-
- /**
- * Gets or creates an {@link Injector} for the given class loader.
- *
- * @return null
- * if it fails.
- */
- private static Injector get(ClassLoader cl) {
- Injector injector = null;
- WeakReference wr;
- ir.lock();
- try {
- wr = injectors.get(cl);
- } finally {
- ir.unlock();
- }
- if (wr != null) {
- injector = wr.get();
- }
- if (injector == null) {
- try {
- wr = new WeakReference(injector = new Injector(cl));
- iw.lock();
- try {
- if (!injectors.containsKey(cl)) {
- injectors.put(cl, wr);
- }
- } finally {
- iw.unlock();
- }
- } catch (SecurityException e) {
- logger.log(Level.FINE, "Unable to set up a back-door for the injector", e);
- return null;
- }
- }
- return injector;
- }
- /**
- * Injected classes keyed by their names.
- */
- private final Map classes = new HashMap<>();
- private final ReentrantReadWriteLock rwl = new ReentrantReadWriteLock();
- private final Lock r = rwl.readLock();
- private final Lock w = rwl.writeLock();
- private final ClassLoader parent;
- /**
- * True if this injector is capable of injecting accessors.
- * False otherwise, which happens if this classloader can't see {@link Accessor}.
- */
- private final boolean loadable;
- private static Method defineClass;
- private static Method resolveClass;
- private static Method findLoadedClass;
- private static Object U;
-
- static {
- try {
- Method[] m = AccessController.doPrivileged(
- new PrivilegedAction() {
- @Override
- public Method[] run() {
- return new Method[]{
- getMethod(ClassLoader.class, "defineClass", String.class, byte[].class, Integer.TYPE, Integer.TYPE),
- getMethod(ClassLoader.class, "resolveClass", Class.class),
- getMethod(ClassLoader.class, "findLoadedClass", String.class)
- };
- }
- }
- );
- defineClass = m[0];
- resolveClass = m[1];
- findLoadedClass = m[2];
- } catch (Throwable t) {
- try {
- U = AccessController.doPrivileged(new PrivilegedExceptionAction() {
- @Override
- public Object run() throws Exception {
- Class u = Class.forName("sun.misc.Unsafe");
- Field theUnsafe = u.getDeclaredField("theUnsafe");
- theUnsafe.setAccessible(true);
- return theUnsafe.get(null);
- }
- });
- defineClass = AccessController.doPrivileged(new PrivilegedExceptionAction() {
- @Override
- public Method run() throws Exception {
- try {
- return U.getClass().getMethod("defineClass",
- new Class[]{String.class,
- byte[].class,
- Integer.TYPE,
- Integer.TYPE,
- ClassLoader.class,
- ProtectionDomain.class});
- } catch (NoSuchMethodException | SecurityException ex) {
- throw ex;
- }
- }
- });
- } catch (SecurityException | PrivilegedActionException ex) {
- Logger.getLogger(Injector.class.getName()).log(Level.SEVERE, null, ex);
- }
- }
- }
-
- private static Method getMethod(final Class> c, final String methodname, final Class>... params) {
- try {
- Method m = c.getDeclaredMethod(methodname, params);
- m.setAccessible(true);
- return m;
- } catch (NoSuchMethodException e) {
- throw new NoSuchMethodError(e.getMessage());
- }
- }
-
- private Injector(ClassLoader parent) {
- this.parent = parent;
- assert parent != null;
-
- boolean loadableCheck = false;
-
- try {
- loadableCheck = parent.loadClass(Accessor.class.getName()) == Accessor.class;
- } catch (ClassNotFoundException e) {
- // not loadable
- }
-
- this.loadable = loadableCheck;
- }
-
- @SuppressWarnings("LockAcquiredButNotSafelyReleased")
- private Class inject(String className, byte[] image) {
- if (!loadable) // this injector cannot inject anything
- {
- return null;
- }
-
- boolean wlocked = false;
- boolean rlocked = false;
- try {
-
- r.lock();
- rlocked = true;
-
- Class c = classes.get(className);
-
- // Unlock now during the findLoadedClass process to avoid
- // deadlocks
- r.unlock();
- rlocked = false;
-
- //find loaded class from classloader
- if (c == null && findLoadedClass != null) {
-
- try {
- c = (Class) findLoadedClass.invoke(parent, className.replace('/', '.'));
- } catch (IllegalArgumentException | IllegalAccessException e) {
- logger.log(Level.FINE, "Unable to find " + className, e);
- } catch (InvocationTargetException e) {
- Throwable t = e.getTargetException();
- logger.log(Level.FINE, "Unable to find " + className, t);
- }
-
- if (c != null) {
-
- w.lock();
- wlocked = true;
-
- classes.put(className, c);
-
- w.unlock();
- wlocked = false;
-
- return c;
- }
- }
-
- if (c == null) {
-
- r.lock();
- rlocked = true;
-
- c = classes.get(className);
-
- // Unlock now during the define/resolve process to avoid
- // deadlocks
- r.unlock();
- rlocked = false;
-
- if (c == null) {
-
- // we need to inject a class into the
- try {
- if (resolveClass != null) {
- c = (Class) defineClass.invoke(parent, className.replace('/', '.'), image, 0, image.length);
- resolveClass.invoke(parent, c);
- } else {
- c = (Class) defineClass.invoke(U, className.replace('/', '.'), image, 0, image.length, parent, Injector.class.getProtectionDomain());
- }
- } catch (IllegalAccessException e) {
- logger.log(Level.FINE, "Unable to inject " + className, e);
- return null;
- } catch (InvocationTargetException e) {
- Throwable t = e.getTargetException();
- if (t instanceof LinkageError) {
- logger.log(Level.FINE, "duplicate class definition bug occured? Please report this : " + className, t);
- } else {
- logger.log(Level.FINE, "Unable to inject " + className, t);
- }
- return null;
- } catch (SecurityException e) {
- logger.log(Level.FINE, "Unable to inject " + className, e);
- return null;
- } catch (LinkageError e) {
- logger.log(Level.FINE, "Unable to inject " + className, e);
- return null;
- }
-
- w.lock();
- wlocked = true;
-
- // During the time we were unlocked, we could have tried to
- // load the class from more than one thread. Check now to see
- // if someone else beat us to registering this class
- if (!classes.containsKey(className)) {
- classes.put(className, c);
- }
-
- w.unlock();
- wlocked = false;
- }
- }
- return c;
- } finally {
- if (rlocked) {
- r.unlock();
- }
- if (wlocked) {
- w.unlock();
- }
- }
- }
-
- private Class find(String className) {
- r.lock();
- try {
- return classes.get(className);
- } finally {
- r.unlock();
- }
- }
-}