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comparison src/share/vm/utilities/constantTag.hpp @ 0:a61af66fc99e jdk7-b24

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author duke
date Sat, 01 Dec 2007 00:00:00 +0000
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1 /*
2 * Copyright 1997-2005 Sun Microsystems, Inc. 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.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
20 * CA 95054 USA or visit www.sun.com if you need additional information or
21 * have any questions.
22 *
23 */
24
25 // constant tags in Java .class files
26
27
28 enum {
29 // See jvm.h for shared JVM_CONSTANT_XXX tags
30 // NOTE: replicated in SA in vm/agent/sun/jvm/hotspot/utilities/ConstantTag.java
31 // Hotspot specific tags
32 JVM_CONSTANT_Invalid = 0, // For bad value initialization
33 JVM_CONSTANT_InternalMin = 100, // First implementation tag (aside from bad value of course)
34 JVM_CONSTANT_UnresolvedClass = 100, // Temporary tag until actual use
35 JVM_CONSTANT_ClassIndex = 101, // Temporary tag while constructing constant pool
36 JVM_CONSTANT_UnresolvedString = 102, // Temporary tag until actual use
37 JVM_CONSTANT_StringIndex = 103, // Temporary tag while constructing constant pool
38 JVM_CONSTANT_UnresolvedClassInError = 104, // Error tag due to resolution error
39 JVM_CONSTANT_InternalMax = 104 // Last implementation tag
40 };
41
42
43 class constantTag VALUE_OBJ_CLASS_SPEC {
44 private:
45 jbyte _tag;
46 public:
47 bool is_klass() const { return _tag == JVM_CONSTANT_Class; }
48 bool is_field () const { return _tag == JVM_CONSTANT_Fieldref; }
49 bool is_method() const { return _tag == JVM_CONSTANT_Methodref; }
50 bool is_interface_method() const { return _tag == JVM_CONSTANT_InterfaceMethodref; }
51 bool is_string() const { return _tag == JVM_CONSTANT_String; }
52 bool is_int() const { return _tag == JVM_CONSTANT_Integer; }
53 bool is_float() const { return _tag == JVM_CONSTANT_Float; }
54 bool is_long() const { return _tag == JVM_CONSTANT_Long; }
55 bool is_double() const { return _tag == JVM_CONSTANT_Double; }
56 bool is_name_and_type() const { return _tag == JVM_CONSTANT_NameAndType; }
57 bool is_utf8() const { return _tag == JVM_CONSTANT_Utf8; }
58
59 bool is_invalid() const { return _tag == JVM_CONSTANT_Invalid; }
60
61 bool is_unresolved_klass() const {
62 return _tag == JVM_CONSTANT_UnresolvedClass || _tag == JVM_CONSTANT_UnresolvedClassInError;
63 }
64
65 bool is_unresolved_klass_in_error() const {
66 return _tag == JVM_CONSTANT_UnresolvedClassInError;
67 }
68
69 bool is_klass_index() const { return _tag == JVM_CONSTANT_ClassIndex; }
70 bool is_unresolved_string() const { return _tag == JVM_CONSTANT_UnresolvedString; }
71 bool is_string_index() const { return _tag == JVM_CONSTANT_StringIndex; }
72
73 bool is_klass_reference() const { return is_klass_index() || is_unresolved_klass(); }
74 bool is_field_or_method() const { return is_field() || is_method() || is_interface_method(); }
75 bool is_symbol() const { return is_utf8(); }
76
77 constantTag(jbyte tag) {
78 assert((tag >= 0 && tag <= JVM_CONSTANT_NameAndType) ||
79 (tag >= JVM_CONSTANT_InternalMin && tag <= JVM_CONSTANT_InternalMax), "Invalid constant tag");
80 _tag = tag;
81 }
82
83 jbyte value() { return _tag; }
84
85 void print_on(outputStream* st) const PRODUCT_RETURN;
86 };