1 | /* |
2 | * Copyright (c) 1997, 2019, 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 | */ |
24 | |
25 | #ifndef SHARE_UTILITIES_CONSTANTTAG_HPP |
26 | #define SHARE_UTILITIES_CONSTANTTAG_HPP |
27 | |
28 | #include "jvm.h" |
29 | #include "utilities/globalDefinitions.hpp" |
30 | |
31 | |
32 | class outputStream; |
33 | |
34 | // constant tags in Java .class files |
35 | |
36 | enum { |
37 | // See jvm.h for shared JVM_CONSTANT_XXX tags |
38 | // NOTE: replicated in SA in vm/agent/sun/jvm/hotspot/utilities/ConstantTag.java |
39 | // Hotspot specific tags |
40 | JVM_CONSTANT_Invalid = 0, // For bad value initialization |
41 | JVM_CONSTANT_InternalMin = 100, // First implementation tag (aside from bad value of course) |
42 | JVM_CONSTANT_UnresolvedClass = 100, // Temporary tag until actual use |
43 | JVM_CONSTANT_ClassIndex = 101, // Temporary tag while constructing constant pool |
44 | JVM_CONSTANT_StringIndex = 102, // Temporary tag while constructing constant pool |
45 | JVM_CONSTANT_UnresolvedClassInError = 103, // Error tag due to resolution error |
46 | JVM_CONSTANT_MethodHandleInError = 104, // Error tag due to resolution error |
47 | JVM_CONSTANT_MethodTypeInError = 105, // Error tag due to resolution error |
48 | JVM_CONSTANT_DynamicInError = 106, // Error tag due to resolution error |
49 | JVM_CONSTANT_InternalMax = 106 // Last implementation tag |
50 | }; |
51 | |
52 | |
53 | class constantTag { |
54 | private: |
55 | jbyte _tag; |
56 | public: |
57 | bool is_klass() const { return _tag == JVM_CONSTANT_Class; } |
58 | bool is_field () const { return _tag == JVM_CONSTANT_Fieldref; } |
59 | bool is_method() const { return _tag == JVM_CONSTANT_Methodref; } |
60 | bool is_interface_method() const { return _tag == JVM_CONSTANT_InterfaceMethodref; } |
61 | bool is_string() const { return _tag == JVM_CONSTANT_String; } |
62 | bool is_int() const { return _tag == JVM_CONSTANT_Integer; } |
63 | bool is_float() const { return _tag == JVM_CONSTANT_Float; } |
64 | bool is_long() const { return _tag == JVM_CONSTANT_Long; } |
65 | bool is_double() const { return _tag == JVM_CONSTANT_Double; } |
66 | bool is_name_and_type() const { return _tag == JVM_CONSTANT_NameAndType; } |
67 | bool is_utf8() const { return _tag == JVM_CONSTANT_Utf8; } |
68 | |
69 | bool is_invalid() const { return _tag == JVM_CONSTANT_Invalid; } |
70 | |
71 | bool is_unresolved_klass() const { |
72 | return _tag == JVM_CONSTANT_UnresolvedClass || _tag == JVM_CONSTANT_UnresolvedClassInError; |
73 | } |
74 | |
75 | bool is_unresolved_klass_in_error() const { |
76 | return _tag == JVM_CONSTANT_UnresolvedClassInError; |
77 | } |
78 | |
79 | bool is_method_handle_in_error() const { |
80 | return _tag == JVM_CONSTANT_MethodHandleInError; |
81 | } |
82 | bool is_method_type_in_error() const { |
83 | return _tag == JVM_CONSTANT_MethodTypeInError; |
84 | } |
85 | |
86 | bool is_dynamic_constant_in_error() const { |
87 | return _tag == JVM_CONSTANT_DynamicInError; |
88 | } |
89 | |
90 | bool is_klass_index() const { return _tag == JVM_CONSTANT_ClassIndex; } |
91 | bool is_string_index() const { return _tag == JVM_CONSTANT_StringIndex; } |
92 | |
93 | bool is_klass_reference() const { return is_klass_index() || is_unresolved_klass(); } |
94 | bool is_klass_or_reference() const{ return is_klass() || is_klass_reference(); } |
95 | bool is_field_or_method() const { return is_field() || is_method() || is_interface_method(); } |
96 | bool is_symbol() const { return is_utf8(); } |
97 | |
98 | bool is_method_type() const { return _tag == JVM_CONSTANT_MethodType; } |
99 | bool is_method_handle() const { return _tag == JVM_CONSTANT_MethodHandle; } |
100 | bool is_dynamic_constant() const { return _tag == JVM_CONSTANT_Dynamic; } |
101 | bool is_invoke_dynamic() const { return _tag == JVM_CONSTANT_InvokeDynamic; } |
102 | |
103 | bool has_bootstrap() const { |
104 | return (_tag == JVM_CONSTANT_Dynamic || |
105 | _tag == JVM_CONSTANT_DynamicInError || |
106 | _tag == JVM_CONSTANT_InvokeDynamic); |
107 | } |
108 | |
109 | bool is_loadable_constant() const { |
110 | return ((_tag >= JVM_CONSTANT_Integer && _tag <= JVM_CONSTANT_String) || |
111 | is_method_type() || is_method_handle() || is_dynamic_constant() || |
112 | is_unresolved_klass()); |
113 | } |
114 | |
115 | constantTag() { |
116 | _tag = JVM_CONSTANT_Invalid; |
117 | } |
118 | constantTag(jbyte tag) { |
119 | assert((tag >= 0 && tag <= JVM_CONSTANT_NameAndType) || |
120 | (tag >= JVM_CONSTANT_MethodHandle && tag <= JVM_CONSTANT_InvokeDynamic) || |
121 | (tag >= JVM_CONSTANT_InternalMin && tag <= JVM_CONSTANT_InternalMax), "Invalid constant tag" ); |
122 | _tag = tag; |
123 | } |
124 | |
125 | static constantTag ofBasicType(BasicType bt) { |
126 | if (is_subword_type(bt)) bt = T_INT; |
127 | switch (bt) { |
128 | case T_OBJECT: return constantTag(JVM_CONSTANT_String); |
129 | case T_INT: return constantTag(JVM_CONSTANT_Integer); |
130 | case T_LONG: return constantTag(JVM_CONSTANT_Long); |
131 | case T_FLOAT: return constantTag(JVM_CONSTANT_Float); |
132 | case T_DOUBLE: return constantTag(JVM_CONSTANT_Double); |
133 | default: break; |
134 | } |
135 | assert(false, "bad basic type for tag" ); |
136 | return constantTag(); |
137 | } |
138 | |
139 | jbyte value() const { return _tag; } |
140 | jbyte error_value() const; |
141 | jbyte non_error_value() const; |
142 | |
143 | BasicType basic_type() const; // if used with ldc, what kind of value gets pushed? |
144 | |
145 | const char* internal_name() const; // for error reporting |
146 | |
147 | void print_on(outputStream* st) const PRODUCT_RETURN; |
148 | }; |
149 | |
150 | #endif // SHARE_UTILITIES_CONSTANTTAG_HPP |
151 | |