1 /*
2 * Copyright (c) 2011, 2015, 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.util.Properties;
29 import jdk.internal.misc.Unsafe;
30 import sun.security.action.GetPropertyAction;
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 static final int CUSTOMIZE_THRESHOLD;
53 static final boolean VAR_HANDLE_GUARDS;
54
55 static {
56 Properties props = GetPropertyAction.privilegedGetProperties();
57 DEBUG_METHOD_HANDLE_NAMES = Boolean.parseBoolean(
58 props.getProperty("java.lang.invoke.MethodHandle.DEBUG_NAMES"));
59 DUMP_CLASS_FILES = Boolean.parseBoolean(
60 props.getProperty("java.lang.invoke.MethodHandle.DUMP_CLASS_FILES"));
61 TRACE_INTERPRETER = Boolean.parseBoolean(
62 props.getProperty("java.lang.invoke.MethodHandle.TRACE_INTERPRETER"));
63 TRACE_METHOD_LINKAGE = Boolean.parseBoolean(
64 props.getProperty("java.lang.invoke.MethodHandle.TRACE_METHOD_LINKAGE"));
65 COMPILE_THRESHOLD = Integer.parseInt(
66 props.getProperty("java.lang.invoke.MethodHandle.COMPILE_THRESHOLD", "0"));
67 DONT_INLINE_THRESHOLD = Integer.parseInt(
68 props.getProperty("java.lang.invoke.MethodHandle.DONT_INLINE_THRESHOLD", "30"));
69 PROFILE_LEVEL = Integer.parseInt(
70 props.getProperty("java.lang.invoke.MethodHandle.PROFILE_LEVEL", "0"));
71 PROFILE_GWT = Boolean.parseBoolean(
72 props.getProperty("java.lang.invoke.MethodHandle.PROFILE_GWT", "true"));
73 CUSTOMIZE_THRESHOLD = Integer.parseInt(
74 props.getProperty("java.lang.invoke.MethodHandle.CUSTOMIZE_THRESHOLD", "127"));
75 VAR_HANDLE_GUARDS = Boolean.parseBoolean(
76 props.getProperty("java.lang.invoke.VarHandle.VAR_HANDLE_GUARDS", "true"));
77
78 if (CUSTOMIZE_THRESHOLD < -1 || CUSTOMIZE_THRESHOLD > 127) {
79 throw newInternalError("CUSTOMIZE_THRESHOLD should be in [-1...127] range");
80 }
81 }
82
83 /** Tell if any of the debugging switches are turned on.
84 * If this is the case, it is reasonable to perform extra checks or save extra information.
85 */
86 /*non-public*/ static boolean debugEnabled() {
87 return (DEBUG_METHOD_HANDLE_NAMES |
88 DUMP_CLASS_FILES |
89 TRACE_INTERPRETER |
90 TRACE_METHOD_LINKAGE);
91 }
92
93 // handy shared exception makers (they simplify the common case code)
94 /*non-public*/ static InternalError newInternalError(String message) {
95 return new InternalError(message);
96 }
97 /*non-public*/ static InternalError newInternalError(String message, Throwable cause) {
98 return new InternalError(message, cause);
99 }
100 /*non-public*/ static InternalError newInternalError(Throwable cause) {
101 return new InternalError(cause);
102 }
103 /*non-public*/ static RuntimeException newIllegalStateException(String message) {
104 return new IllegalStateException(message);
105 }
106 /*non-public*/ static RuntimeException newIllegalStateException(String message, Object obj) {
107 return new IllegalStateException(message(message, obj));
108 }
109 /*non-public*/ static RuntimeException newIllegalArgumentException(String message) {
110 return new IllegalArgumentException(message);
111 }
112 /*non-public*/ static RuntimeException newIllegalArgumentException(String message, Object obj) {
113 return new IllegalArgumentException(message(message, obj));
114 }
115 /*non-public*/ static RuntimeException newIllegalArgumentException(String message, Object obj, Object obj2) {
116 return new IllegalArgumentException(message(message, obj, obj2));
117 }
118 /** Propagate unchecked exceptions and errors, but wrap anything checked and throw that instead. */
119 /*non-public*/ static Error uncaughtException(Throwable ex) {
120 if (ex instanceof Error) throw (Error) ex;
121 if (ex instanceof RuntimeException) throw (RuntimeException) ex;
122 throw newInternalError("uncaught exception", ex);
123 }
124 private static String message(String message, Object obj) {
125 if (obj != null) message = message + ": " + obj;
126 return message;
127 }
128 private static String message(String message, Object obj, Object obj2) {
129 if (obj != null || obj2 != null) message = message + ": " + obj + ", " + obj2;
130 return message;
131 }
132 }