| /* |
| * Copyright (c) 2011, 2015, 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 java.lang.invoke; |
| |
| import java.security.AccessController; |
| import java.security.PrivilegedAction; |
| import jdk.internal.misc.Unsafe; |
| |
| /** |
| * This class consists exclusively of static names internal to the |
| * method handle implementation. |
| * Usage: {@code import static java.lang.invoke.MethodHandleStatics.*} |
| * @author John Rose, JSR 292 EG |
| */ |
| /*non-public*/ class MethodHandleStatics { |
| |
| private MethodHandleStatics() { } // do not instantiate |
| |
| static final Unsafe UNSAFE = Unsafe.getUnsafe(); |
| |
| static final boolean DEBUG_METHOD_HANDLE_NAMES; |
| static final boolean DUMP_CLASS_FILES; |
| static final boolean TRACE_INTERPRETER; |
| static final boolean TRACE_METHOD_LINKAGE; |
| static final int COMPILE_THRESHOLD; |
| static final int DONT_INLINE_THRESHOLD; |
| static final int PROFILE_LEVEL; |
| static final boolean PROFILE_GWT; |
| static final int CUSTOMIZE_THRESHOLD; |
| static final boolean VAR_HANDLE_GUARDS; |
| |
| static { |
| final Object[] values = new Object[10]; |
| AccessController.doPrivileged(new PrivilegedAction<>() { |
| public Void run() { |
| values[0] = Boolean.getBoolean("java.lang.invoke.MethodHandle.DEBUG_NAMES"); |
| values[1] = Boolean.getBoolean("java.lang.invoke.MethodHandle.DUMP_CLASS_FILES"); |
| values[2] = Boolean.getBoolean("java.lang.invoke.MethodHandle.TRACE_INTERPRETER"); |
| values[3] = Boolean.getBoolean("java.lang.invoke.MethodHandle.TRACE_METHOD_LINKAGE"); |
| values[4] = Integer.getInteger("java.lang.invoke.MethodHandle.COMPILE_THRESHOLD", 0); |
| values[5] = Integer.getInteger("java.lang.invoke.MethodHandle.DONT_INLINE_THRESHOLD", 30); |
| values[6] = Integer.getInteger("java.lang.invoke.MethodHandle.PROFILE_LEVEL", 0); |
| values[7] = Boolean.parseBoolean(System.getProperty("java.lang.invoke.MethodHandle.PROFILE_GWT", "true")); |
| values[8] = Integer.getInteger("java.lang.invoke.MethodHandle.CUSTOMIZE_THRESHOLD", 127); |
| values[9] = Boolean.parseBoolean(System.getProperty("java.lang.invoke.VarHandle.VAR_HANDLE_GUARDS", "true")); |
| return null; |
| } |
| }); |
| DEBUG_METHOD_HANDLE_NAMES = (Boolean) values[0]; |
| DUMP_CLASS_FILES = (Boolean) values[1]; |
| TRACE_INTERPRETER = (Boolean) values[2]; |
| TRACE_METHOD_LINKAGE = (Boolean) values[3]; |
| COMPILE_THRESHOLD = (Integer) values[4]; |
| DONT_INLINE_THRESHOLD = (Integer) values[5]; |
| PROFILE_LEVEL = (Integer) values[6]; |
| PROFILE_GWT = (Boolean) values[7]; |
| CUSTOMIZE_THRESHOLD = (Integer) values[8]; |
| VAR_HANDLE_GUARDS = (Boolean) values[9]; |
| |
| if (CUSTOMIZE_THRESHOLD < -1 || CUSTOMIZE_THRESHOLD > 127) { |
| throw newInternalError("CUSTOMIZE_THRESHOLD should be in [-1...127] range"); |
| } |
| } |
| |
| /** Tell if any of the debugging switches are turned on. |
| * If this is the case, it is reasonable to perform extra checks or save extra information. |
| */ |
| /*non-public*/ static boolean debugEnabled() { |
| return (DEBUG_METHOD_HANDLE_NAMES | |
| DUMP_CLASS_FILES | |
| TRACE_INTERPRETER | |
| TRACE_METHOD_LINKAGE); |
| } |
| |
| // handy shared exception makers (they simplify the common case code) |
| /*non-public*/ static InternalError newInternalError(String message) { |
| return new InternalError(message); |
| } |
| /*non-public*/ static InternalError newInternalError(String message, Throwable cause) { |
| return new InternalError(message, cause); |
| } |
| /*non-public*/ static InternalError newInternalError(Throwable cause) { |
| return new InternalError(cause); |
| } |
| /*non-public*/ static RuntimeException newIllegalStateException(String message) { |
| return new IllegalStateException(message); |
| } |
| /*non-public*/ static RuntimeException newIllegalStateException(String message, Object obj) { |
| return new IllegalStateException(message(message, obj)); |
| } |
| /*non-public*/ static RuntimeException newIllegalArgumentException(String message) { |
| return new IllegalArgumentException(message); |
| } |
| /*non-public*/ static RuntimeException newIllegalArgumentException(String message, Object obj) { |
| return new IllegalArgumentException(message(message, obj)); |
| } |
| /*non-public*/ static RuntimeException newIllegalArgumentException(String message, Object obj, Object obj2) { |
| return new IllegalArgumentException(message(message, obj, obj2)); |
| } |
| /** Propagate unchecked exceptions and errors, but wrap anything checked and throw that instead. */ |
| /*non-public*/ static Error uncaughtException(Throwable ex) { |
| if (ex instanceof Error) throw (Error) ex; |
| if (ex instanceof RuntimeException) throw (RuntimeException) ex; |
| throw newInternalError("uncaught exception", ex); |
| } |
| private static String message(String message, Object obj) { |
| if (obj != null) message = message + ": " + obj; |
| return message; |
| } |
| private static String message(String message, Object obj, Object obj2) { |
| if (obj != null || obj2 != null) message = message + ": " + obj + ", " + obj2; |
| return message; |
| } |
| } |