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 java.security.AccessController; 29 import java.security.PrivilegedAction; 30 import sun.misc.Unsafe; 31 32 /** 33 * This class consists exclusively of static names internal to the 34 * method handle implementation. 35 * Usage: {@code import static java.lang.invoke.MethodHandleStatics.*} 36 * @author John Rose, JSR 292 EG 37 */ 38 /*non-public*/ class MethodHandleStatics { 39 40 private MethodHandleStatics() { } // do not instantiate 41 42 static final Unsafe UNSAFE = Unsafe.getUnsafe(); 43 44 static final boolean DEBUG_METHOD_HANDLE_NAMES; 45 static final boolean DUMP_CLASS_FILES; 46 static final boolean TRACE_INTERPRETER; 47 static final boolean TRACE_METHOD_LINKAGE; 48 static final int COMPILE_THRESHOLD; 49 static final int DONT_INLINE_THRESHOLD; 50 static final int PROFILE_LEVEL; 51 static final boolean PROFILE_GWT; 52 53 static { 54 final Object[] values = new Object[8]; 55 AccessController.doPrivileged(new PrivilegedAction<Void>() { 56 public Void run() { 57 values[0] = Boolean.getBoolean("java.lang.invoke.MethodHandle.DEBUG_NAMES"); 58 values[1] = Boolean.getBoolean("java.lang.invoke.MethodHandle.DUMP_CLASS_FILES"); 59 values[2] = Boolean.getBoolean("java.lang.invoke.MethodHandle.TRACE_INTERPRETER"); 60 values[3] = Boolean.getBoolean("java.lang.invoke.MethodHandle.TRACE_METHOD_LINKAGE"); 61 values[4] = Integer.getInteger("java.lang.invoke.MethodHandle.COMPILE_THRESHOLD", 0); 62 values[5] = Integer.getInteger("java.lang.invoke.MethodHandle.DONT_INLINE_THRESHOLD", 30); 63 values[6] = Integer.getInteger("java.lang.invoke.MethodHandle.PROFILE_LEVEL", 0); 64 values[7] = Boolean.parseBoolean(System.getProperty("java.lang.invoke.MethodHandle.PROFILE_GWT", "true")); 65 return null; 66 } 67 }); 68 DEBUG_METHOD_HANDLE_NAMES = (Boolean) values[0]; 69 DUMP_CLASS_FILES = (Boolean) values[1]; 70 TRACE_INTERPRETER = (Boolean) values[2]; 71 TRACE_METHOD_LINKAGE = (Boolean) values[3]; 72 COMPILE_THRESHOLD = (Integer) values[4]; 73 DONT_INLINE_THRESHOLD = (Integer) values[5]; 74 PROFILE_LEVEL = (Integer) values[6]; 75 PROFILE_GWT = (Boolean) values[7]; 76 } 77 78 /** Tell if any of the debugging switches are turned on. 79 * If this is the case, it is reasonable to perform extra checks or save extra information. 80 */ 81 /*non-public*/ static boolean debugEnabled() { 82 return (DEBUG_METHOD_HANDLE_NAMES | 83 DUMP_CLASS_FILES | 84 TRACE_INTERPRETER | 85 TRACE_METHOD_LINKAGE); 86 } 87 88 /*non-public*/ static String getNameString(MethodHandle target, MethodType type) { 89 if (type == null) 90 type = target.type(); 91 MemberName name = null; 92 if (target != null) 93 name = target.internalMemberName(); 94 if (name == null) 95 return "invoke" + type; 96 return name.getName() + type; 97 } 98 99 /*non-public*/ static String getNameString(MethodHandle target, MethodHandle typeHolder) { 100 return getNameString(target, typeHolder == null ? (MethodType) null : typeHolder.type()); 101 } 102 103 /*non-public*/ static String getNameString(MethodHandle target) { 104 return getNameString(target, (MethodType) null); 105 } 106 107 /*non-public*/ static String addTypeString(Object obj, MethodHandle target) { 108 String str = String.valueOf(obj); 109 if (target == null) return str; 110 int paren = str.indexOf('('); 111 if (paren >= 0) str = str.substring(0, paren); 112 return str + target.type(); 113 } 114 115 // handy shared exception makers (they simplify the common case code) 116 /*non-public*/ static InternalError newInternalError(String message) { 117 return new InternalError(message); 118 } 119 /*non-public*/ static InternalError newInternalError(String message, Throwable cause) { 120 return new InternalError(message, cause); 121 } 122 /*non-public*/ static InternalError newInternalError(Throwable cause) { 123 return new InternalError(cause); 124 } 125 /*non-public*/ static RuntimeException newIllegalStateException(String message) { 126 return new IllegalStateException(message); 127 } 128 /*non-public*/ static RuntimeException newIllegalStateException(String message, Object obj) { 129 return new IllegalStateException(message(message, obj)); 130 } 131 /*non-public*/ static RuntimeException newIllegalArgumentException(String message) { 132 return new IllegalArgumentException(message); 133 } 134 /*non-public*/ static RuntimeException newIllegalArgumentException(String message, Object obj) { 135 return new IllegalArgumentException(message(message, obj)); 136 } 137 /*non-public*/ static RuntimeException newIllegalArgumentException(String message, Object obj, Object obj2) { 138 return new IllegalArgumentException(message(message, obj, obj2)); 139 } 140 /** Propagate unchecked exceptions and errors, but wrap anything checked and throw that instead. */ 141 /*non-public*/ static Error uncaughtException(Throwable ex) { 142 if (ex instanceof Error) throw (Error) ex; 143 if (ex instanceof RuntimeException) throw (RuntimeException) ex; 144 throw newInternalError("uncaught exception", ex); 145 } 146 static Error NYI() { 147 throw new AssertionError("NYI"); 148 } 149 private static String message(String message, Object obj) { 150 if (obj != null) message = message + ": " + obj; 151 return message; 152 } 153 private static String message(String message, Object obj, Object obj2) { 154 if (obj != null || obj2 != null) message = message + ": " + obj + ", " + obj2; 155 return message; 156 } 157 }