1 /*
2 * Copyright (c) 1997, 2017, 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 *
27
28 #include "jvm.h"
29 #include "memory/allocation.hpp"
30
31 // constant tags in Java .class files
32
33
34 enum {
35 // See jvm.h for shared JVM_CONSTANT_XXX tags
36 // NOTE: replicated in SA in vm/agent/sun/jvm/hotspot/utilities/ConstantTag.java
37 // Hotspot specific tags
38 JVM_CONSTANT_Invalid = 0, // For bad value initialization
39 JVM_CONSTANT_InternalMin = 100, // First implementation tag (aside from bad value of course)
40 JVM_CONSTANT_UnresolvedClass = 100, // Temporary tag until actual use
41 JVM_CONSTANT_ClassIndex = 101, // Temporary tag while constructing constant pool, class redefinition
42 JVM_CONSTANT_StringIndex = 102, // Temporary tag while constructing constant pool, class redefinition
43 JVM_CONSTANT_UnresolvedClassInError = 103, // Error tag due to resolution error
44 JVM_CONSTANT_MethodHandleInError = 104, // Error tag due to resolution error
45 JVM_CONSTANT_MethodTypeInError = 105, // Error tag due to resolution error
46 JVM_CONSTANT_DynamicInError = 106, // Error tag due to resolution error
47 JVM_CONSTANT_Value = 107, // Internal derived value type
48 JVM_CONSTANT_ValueIndex = 108, // Temporary tag while construction constant pool, class redefinition
49 JVM_CONSTANT_UnresolvedValue = 109, // Temporary tag until actual use of derived value type
50 JVM_CONSTANT_UnresolvedValueInError = 110, // Error tag due to resolution error
51 JVM_CONSTANT_InternalMax = 110 // Last implementation tag
52 };
53
54
55 class constantTag VALUE_OBJ_CLASS_SPEC {
56 private:
57 jbyte _tag;
58 public:
59 bool is_klass() const { return _tag == JVM_CONSTANT_Class; }
60 bool is_value_type() const { return _tag == JVM_CONSTANT_Value; }
61 bool is_field () const { return _tag == JVM_CONSTANT_Fieldref; }
62 bool is_method() const { return _tag == JVM_CONSTANT_Methodref; }
63 bool is_interface_method() const { return _tag == JVM_CONSTANT_InterfaceMethodref; }
64 bool is_string() const { return _tag == JVM_CONSTANT_String; }
65 bool is_int() const { return _tag == JVM_CONSTANT_Integer; }
66 bool is_float() const { return _tag == JVM_CONSTANT_Float; }
67 bool is_long() const { return _tag == JVM_CONSTANT_Long; }
68 bool is_double() const { return _tag == JVM_CONSTANT_Double; }
69 bool is_name_and_type() const { return _tag == JVM_CONSTANT_NameAndType; }
70 bool is_utf8() const { return _tag == JVM_CONSTANT_Utf8; }
71
72 bool is_invalid() const { return _tag == JVM_CONSTANT_Invalid; }
73
74 bool is_unresolved_klass() const {
75 return _tag == JVM_CONSTANT_UnresolvedClass || _tag == JVM_CONSTANT_UnresolvedClassInError;
76 }
77
78 bool is_unresolved_klass_in_error() const {
79 return _tag == JVM_CONSTANT_UnresolvedClassInError;
80 }
81
82 bool is_unresolved_value_type() const {
83 return _tag == JVM_CONSTANT_UnresolvedValue || _tag == JVM_CONSTANT_UnresolvedValueInError;
84 }
85
86 bool is_unresolved_value_type_in_error() const {
87 return _tag == JVM_CONSTANT_UnresolvedValueInError;
88 }
89
90 bool is_method_handle_in_error() const {
91 return _tag == JVM_CONSTANT_MethodHandleInError;
92 }
93 bool is_method_type_in_error() const {
94 return _tag == JVM_CONSTANT_MethodTypeInError;
95 }
96
97 bool is_dynamic_constant_in_error() const {
98 return _tag == JVM_CONSTANT_DynamicInError;
99 }
100
101 bool is_klass_index() const { return _tag == JVM_CONSTANT_ClassIndex; }
102 bool is_value_type_index() const { return _tag == JVM_CONSTANT_ValueIndex; }
103 bool is_string_index() const { return _tag == JVM_CONSTANT_StringIndex; }
104
105 bool is_klass_reference() const { return is_klass_index() || is_unresolved_klass(); }
106 bool is_klass_or_reference() const{ return is_klass() || is_klass_reference(); }
107 bool is_field_or_method() const { return is_field() || is_method() || is_interface_method(); }
108 bool is_symbol() const { return is_utf8(); }
109
110 bool is_value_type_or_reference() const { return is_value_type_index() || is_value_type() || is_unresolved_value_type(); }
111
112 bool is_method_type() const { return _tag == JVM_CONSTANT_MethodType; }
113 bool is_method_handle() const { return _tag == JVM_CONSTANT_MethodHandle; }
114 bool is_dynamic_constant() const { return _tag == JVM_CONSTANT_Dynamic; }
115 bool is_invoke_dynamic() const { return _tag == JVM_CONSTANT_InvokeDynamic; }
116
117 bool is_loadable_constant() const {
118 return ((_tag >= JVM_CONSTANT_Integer && _tag <= JVM_CONSTANT_String) ||
119 is_method_type() || is_method_handle() || is_dynamic_constant() ||
120 is_unresolved_klass());
121 }
122
123 constantTag() {
124 _tag = JVM_CONSTANT_Invalid;
125 }
126 constantTag(jbyte tag) {
127 assert((tag >= 0 && tag <= JVM_CONSTANT_NameAndType) ||
128 (tag >= JVM_CONSTANT_MethodHandle && tag <= JVM_CONSTANT_InvokeDynamic) ||
129 (tag >= JVM_CONSTANT_InternalMin && tag <= JVM_CONSTANT_InternalMax), "Invalid constant tag");
130 _tag = tag;
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1 /*
2 * Copyright (c) 1997, 2018, 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 *
27
28 #include "jvm.h"
29 #include "memory/allocation.hpp"
30
31 // constant tags in Java .class files
32
33
34 enum {
35 // See jvm.h for shared JVM_CONSTANT_XXX tags
36 // NOTE: replicated in SA in vm/agent/sun/jvm/hotspot/utilities/ConstantTag.java
37 // Hotspot specific tags
38 JVM_CONSTANT_Invalid = 0, // For bad value initialization
39 JVM_CONSTANT_InternalMin = 100, // First implementation tag (aside from bad value of course)
40 JVM_CONSTANT_UnresolvedClass = 100, // Temporary tag until actual use
41 JVM_CONSTANT_ClassIndex = 101, // Temporary tag while constructing constant pool, class redefinition
42 JVM_CONSTANT_StringIndex = 102, // Temporary tag while constructing constant pool, class redefinition
43 JVM_CONSTANT_UnresolvedClassInError = 103, // Error tag due to resolution error
44 JVM_CONSTANT_MethodHandleInError = 104, // Error tag due to resolution error
45 JVM_CONSTANT_MethodTypeInError = 105, // Error tag due to resolution error
46 JVM_CONSTANT_DynamicInError = 106, // Error tag due to resolution error
47 JVM_CONSTANT_InternalMax = 106 // Last implementation tag
48 };
49
50
51 class constantTag VALUE_OBJ_CLASS_SPEC {
52 private:
53 jbyte _tag;
54 public:
55 bool is_klass() const { return _tag == JVM_CONSTANT_Class; }
56 bool is_field () const { return _tag == JVM_CONSTANT_Fieldref; }
57 bool is_method() const { return _tag == JVM_CONSTANT_Methodref; }
58 bool is_interface_method() const { return _tag == JVM_CONSTANT_InterfaceMethodref; }
59 bool is_string() const { return _tag == JVM_CONSTANT_String; }
60 bool is_int() const { return _tag == JVM_CONSTANT_Integer; }
61 bool is_float() const { return _tag == JVM_CONSTANT_Float; }
62 bool is_long() const { return _tag == JVM_CONSTANT_Long; }
63 bool is_double() const { return _tag == JVM_CONSTANT_Double; }
64 bool is_name_and_type() const { return _tag == JVM_CONSTANT_NameAndType; }
65 bool is_utf8() const { return _tag == JVM_CONSTANT_Utf8; }
66
67 bool is_invalid() const { return _tag == JVM_CONSTANT_Invalid; }
68
69 bool is_unresolved_klass() const {
70 return _tag == JVM_CONSTANT_UnresolvedClass || _tag == JVM_CONSTANT_UnresolvedClassInError;
71 }
72
73 bool is_unresolved_klass_in_error() const {
74 return _tag == JVM_CONSTANT_UnresolvedClassInError;
75 }
76
77 bool is_method_handle_in_error() const {
78 return _tag == JVM_CONSTANT_MethodHandleInError;
79 }
80 bool is_method_type_in_error() const {
81 return _tag == JVM_CONSTANT_MethodTypeInError;
82 }
83
84 bool is_dynamic_constant_in_error() const {
85 return _tag == JVM_CONSTANT_DynamicInError;
86 }
87
88 bool is_klass_index() const { return _tag == JVM_CONSTANT_ClassIndex; }
89 bool is_string_index() const { return _tag == JVM_CONSTANT_StringIndex; }
90
91 bool is_klass_reference() const { return is_klass_index() || is_unresolved_klass(); }
92 bool is_klass_or_reference() const{ return is_klass() || is_klass_reference(); }
93 bool is_field_or_method() const { return is_field() || is_method() || is_interface_method(); }
94 bool is_symbol() const { return is_utf8(); }
95
96 bool is_method_type() const { return _tag == JVM_CONSTANT_MethodType; }
97 bool is_method_handle() const { return _tag == JVM_CONSTANT_MethodHandle; }
98 bool is_dynamic_constant() const { return _tag == JVM_CONSTANT_Dynamic; }
99 bool is_invoke_dynamic() const { return _tag == JVM_CONSTANT_InvokeDynamic; }
100
101 bool is_loadable_constant() const {
102 return ((_tag >= JVM_CONSTANT_Integer && _tag <= JVM_CONSTANT_String) ||
103 is_method_type() || is_method_handle() || is_dynamic_constant() ||
104 is_unresolved_klass());
105 }
106
107 constantTag() {
108 _tag = JVM_CONSTANT_Invalid;
109 }
110 constantTag(jbyte tag) {
111 assert((tag >= 0 && tag <= JVM_CONSTANT_NameAndType) ||
112 (tag >= JVM_CONSTANT_MethodHandle && tag <= JVM_CONSTANT_InvokeDynamic) ||
113 (tag >= JVM_CONSTANT_InternalMin && tag <= JVM_CONSTANT_InternalMax), "Invalid constant tag");
114 _tag = tag;
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