1 /* 2 * Copyright (c) 2011, 2012, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. Oracle designates this 8 * particular file as subject to the "Classpath" exception as provided 9 * by Oracle in the LICENSE file that accompanied this code. 10 * 11 * This code is distributed in the hope that it will be useful, but WITHOUT 12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 14 * version 2 for more details (a copy is included in the LICENSE file that 15 * accompanied this code). 16 * 17 * You should have received a copy of the GNU General Public License version 18 * 2 along with this work; if not, write to the Free Software Foundation, 19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 20 * 21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 22 * or visit www.oracle.com if you need additional information or have any 23 * questions. 24 */ 25 26 package java.lang.invoke; 27 28 import sun.misc.Unsafe; 29 30 /** 31 * This class consists exclusively of static names internal to the 32 * method handle implementation. 33 * Usage: {@code import static java.lang.invoke.MethodHandleStatics.*} 34 * @author John Rose, JSR 292 EG 35 */ 36 /*non-public*/ class MethodHandleStatics { 37 38 private MethodHandleStatics() { } // do not instantiate 39 40 static final Unsafe UNSAFE = Unsafe.getUnsafe(); 41 42 // Android-changed: Remove debugging related static fields. 43 // They are unused and have no equivalent on Android. 44 /* 45 static final boolean DEBUG_METHOD_HANDLE_NAMES; 46 static final boolean DUMP_CLASS_FILES; 47 static final boolean TRACE_INTERPRETER; 48 static final boolean TRACE_METHOD_LINKAGE; 49 static final int COMPILE_THRESHOLD; 50 static final int DONT_INLINE_THRESHOLD; 51 static final int PROFILE_LEVEL; 52 static final boolean PROFILE_GWT; 53 static final int CUSTOMIZE_THRESHOLD; 54 55 static { 56 final Object[] values = new Object[9]; 57 AccessController.doPrivileged(new PrivilegedAction<Void>() { 58 public Void run() { 59 values[0] = Boolean.getBoolean("java.lang.invoke.MethodHandle.DEBUG_NAMES"); 60 values[1] = Boolean.getBoolean("java.lang.invoke.MethodHandle.DUMP_CLASS_FILES"); 61 values[2] = Boolean.getBoolean("java.lang.invoke.MethodHandle.TRACE_INTERPRETER"); 62 values[3] = Boolean.getBoolean("java.lang.invoke.MethodHandle.TRACE_METHOD_LINKAGE"); 63 values[4] = Integer.getInteger("java.lang.invoke.MethodHandle.COMPILE_THRESHOLD", 0); 64 values[5] = Integer.getInteger("java.lang.invoke.MethodHandle.DONT_INLINE_THRESHOLD", 30); 65 values[6] = Integer.getInteger("java.lang.invoke.MethodHandle.PROFILE_LEVEL", 0); 66 values[7] = Boolean.parseBoolean(System.getProperty("java.lang.invoke.MethodHandle.PROFILE_GWT", "true")); 67 values[8] = Integer.getInteger("java.lang.invoke.MethodHandle.CUSTOMIZE_THRESHOLD", 127); 68 return null; 69 } 70 }); 71 DEBUG_METHOD_HANDLE_NAMES = (Boolean) values[0]; 72 DUMP_CLASS_FILES = (Boolean) values[1]; 73 TRACE_INTERPRETER = (Boolean) values[2]; 74 TRACE_METHOD_LINKAGE = (Boolean) values[3]; 75 COMPILE_THRESHOLD = (Integer) values[4]; 76 DONT_INLINE_THRESHOLD = (Integer) values[5]; 77 PROFILE_LEVEL = (Integer) values[6]; 78 PROFILE_GWT = (Boolean) values[7]; 79 CUSTOMIZE_THRESHOLD = (Integer) values[8]; 80 81 if (CUSTOMIZE_THRESHOLD < -1 || CUSTOMIZE_THRESHOLD > 127) { 82 throw newInternalError("CUSTOMIZE_THRESHOLD should be in [-1...127] range"); 83 } 84 } 85 86 /** Tell if any of the debugging switches are turned on. 87 * If this is the case, it is reasonable to perform extra checks or save extra information. 88 * 89 /*non-public* static boolean debugEnabled() { 90 return (DEBUG_METHOD_HANDLE_NAMES | 91 DUMP_CLASS_FILES | 92 TRACE_INTERPRETER | 93 TRACE_METHOD_LINKAGE); 94 } 95 */ 96 97 // Android-removed: Methods operating on MethodHandles that are currently unused on Android. 98 /* 99 /*non-public* static String getNameString(MethodHandle target, MethodType type) { 100 if (type == null) 101 type = target.type(); 102 MemberName name = null; 103 if (target != null) 104 name = target.internalMemberName(); 105 if (name == null) 106 return "invoke" + type; 107 return name.getName() + type; 108 } 109 110 /*non-public* static String getNameString(MethodHandle target, MethodHandle typeHolder) { 111 return getNameString(target, typeHolder == null ? (MethodType) null : typeHolder.type()); 112 } 113 114 /*non-public* static String getNameString(MethodHandle target) { 115 return getNameString(target, (MethodType) null); 116 } 117 118 /*non-public* static String addTypeString(Object obj, MethodHandle target) { 119 String str = String.valueOf(obj); 120 if (target == null) return str; 121 int paren = str.indexOf('('); 122 if (paren >= 0) str = str.substring(0, paren); 123 return str + target.type(); 124 } 125 */ 126 127 // handy shared exception makers (they simplify the common case code) 128 /*non-public*/ static InternalError newInternalError(String message) { 129 return new InternalError(message); 130 } 131 /*non-public*/ static InternalError newInternalError(String message, Throwable cause) { 132 return new InternalError(message, cause); 133 } 134 /*non-public*/ static InternalError newInternalError(Throwable cause) { 135 return new InternalError(cause); 136 } 137 /*non-public*/ static RuntimeException newIllegalStateException(String message) { 138 return new IllegalStateException(message); 139 } 140 /*non-public*/ static RuntimeException newIllegalStateException(String message, Object obj) { 141 return new IllegalStateException(message(message, obj)); 142 } 143 /*non-public*/ static RuntimeException newIllegalArgumentException(String message) { 144 return new IllegalArgumentException(message); 145 } 146 /*non-public*/ static RuntimeException newIllegalArgumentException(String message, Object obj) { 147 return new IllegalArgumentException(message(message, obj)); 148 } 149 /*non-public*/ static RuntimeException newIllegalArgumentException(String message, Object obj, Object obj2) { 150 return new IllegalArgumentException(message(message, obj, obj2)); 151 } 152 /** Propagate unchecked exceptions and errors, but wrap anything checked and throw that instead. */ 153 /*non-public*/ static Error uncaughtException(Throwable ex) { 154 if (ex instanceof Error) throw (Error) ex; 155 if (ex instanceof RuntimeException) throw (RuntimeException) ex; 156 throw newInternalError("uncaught exception", ex); 157 } 158 static Error NYI() { 159 throw new AssertionError("NYI"); 160 } 161 private static String message(String message, Object obj) { 162 if (obj != null) message = message + ": " + obj; 163 return message; 164 } 165 private static String message(String message, Object obj, Object obj2) { 166 if (obj != null || obj2 != null) message = message + ": " + obj + ", " + obj2; 167 return message; 168 } 169 } 170
