Mon, 09 Aug 2010 17:51:56 -0700
Merge
1 /*
2 * Copyright (c) 1997, 2008, 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.
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 Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 *
23 */
25 // constant tags in Java .class files
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_Object = 105, // Required for BoundMethodHandle arguments.
40 JVM_CONSTANT_InternalMax = 105 // Last implementation tag
41 };
44 class constantTag VALUE_OBJ_CLASS_SPEC {
45 private:
46 jbyte _tag;
47 public:
48 bool is_klass() const { return _tag == JVM_CONSTANT_Class; }
49 bool is_field () const { return _tag == JVM_CONSTANT_Fieldref; }
50 bool is_method() const { return _tag == JVM_CONSTANT_Methodref; }
51 bool is_interface_method() const { return _tag == JVM_CONSTANT_InterfaceMethodref; }
52 bool is_string() const { return _tag == JVM_CONSTANT_String; }
53 bool is_int() const { return _tag == JVM_CONSTANT_Integer; }
54 bool is_float() const { return _tag == JVM_CONSTANT_Float; }
55 bool is_long() const { return _tag == JVM_CONSTANT_Long; }
56 bool is_double() const { return _tag == JVM_CONSTANT_Double; }
57 bool is_name_and_type() const { return _tag == JVM_CONSTANT_NameAndType; }
58 bool is_utf8() const { return _tag == JVM_CONSTANT_Utf8; }
60 bool is_invalid() const { return _tag == JVM_CONSTANT_Invalid; }
62 bool is_unresolved_klass() const {
63 return _tag == JVM_CONSTANT_UnresolvedClass || _tag == JVM_CONSTANT_UnresolvedClassInError;
64 }
66 bool is_unresolved_klass_in_error() const {
67 return _tag == JVM_CONSTANT_UnresolvedClassInError;
68 }
70 bool is_klass_index() const { return _tag == JVM_CONSTANT_ClassIndex; }
71 bool is_unresolved_string() const { return _tag == JVM_CONSTANT_UnresolvedString; }
72 bool is_string_index() const { return _tag == JVM_CONSTANT_StringIndex; }
74 bool is_object() const { return _tag == JVM_CONSTANT_Object; }
76 bool is_klass_reference() const { return is_klass_index() || is_unresolved_klass(); }
77 bool is_klass_or_reference() const{ return is_klass() || is_klass_reference(); }
78 bool is_field_or_method() const { return is_field() || is_method() || is_interface_method(); }
79 bool is_symbol() const { return is_utf8(); }
81 bool is_method_type() const { return _tag == JVM_CONSTANT_MethodType; }
82 bool is_method_handle() const { return _tag == JVM_CONSTANT_MethodHandle; }
83 bool is_invoke_dynamic() const { return _tag == JVM_CONSTANT_InvokeDynamic; }
85 constantTag() {
86 _tag = JVM_CONSTANT_Invalid;
87 }
88 constantTag(jbyte tag) {
89 assert((tag >= 0 && tag <= JVM_CONSTANT_NameAndType) ||
90 (tag >= JVM_CONSTANT_MethodHandle && tag <= JVM_CONSTANT_InvokeDynamic) ||
91 (tag >= JVM_CONSTANT_InternalMin && tag <= JVM_CONSTANT_InternalMax), "Invalid constant tag");
92 _tag = tag;
93 }
95 jbyte value() { return _tag; }
97 BasicType basic_type() const; // if used with ldc, what kind of value gets pushed?
99 const char* internal_name() const; // for error reporting
101 void print_on(outputStream* st) const PRODUCT_RETURN;
102 };