22 *
23 */
24
25 #ifndef SHARE_UTILITIES_CONSTANTTAG_HPP
26 #define SHARE_UTILITIES_CONSTANTTAG_HPP
27
28 #include "utilities/globalDefinitions.hpp"
29
30
31 class outputStream;
32
33 // constant tags in Java .class files
34
35 enum {
36 // See jvm.h for shared JVM_CONSTANT_XXX tags
37 // NOTE: replicated in SA in vm/agent/sun/jvm/hotspot/utilities/ConstantTag.java
38 // Hotspot specific tags
39 JVM_CONSTANT_Invalid = 0, // For bad value initialization
40 JVM_CONSTANT_InternalMin = 100, // First implementation tag (aside from bad value of course)
41 JVM_CONSTANT_UnresolvedClass = 100, // Temporary tag until actual use
42 JVM_CONSTANT_ClassIndex = 101, // Temporary tag while constructing constant pool
43 JVM_CONSTANT_StringIndex = 102, // Temporary tag while constructing constant pool
44 JVM_CONSTANT_UnresolvedClassInError = 103, // Error tag due to resolution error
45 JVM_CONSTANT_MethodHandleInError = 104, // Error tag due to resolution error
46 JVM_CONSTANT_MethodTypeInError = 105, // Error tag due to resolution error
47 JVM_CONSTANT_DynamicInError = 106, // Error tag due to resolution error
48 JVM_CONSTANT_InternalMax = 106 // Last implementation tag
49 };
50
51
52 class constantTag {
53 private:
54 jbyte _tag;
55 public:
56 bool is_klass() const { return _tag == JVM_CONSTANT_Class; }
57 bool is_field () const { return _tag == JVM_CONSTANT_Fieldref; }
58 bool is_method() const { return _tag == JVM_CONSTANT_Methodref; }
59 bool is_interface_method() const { return _tag == JVM_CONSTANT_InterfaceMethodref; }
60 bool is_string() const { return _tag == JVM_CONSTANT_String; }
61 bool is_int() const { return _tag == JVM_CONSTANT_Integer; }
62 bool is_float() const { return _tag == JVM_CONSTANT_Float; }
63 bool is_long() const { return _tag == JVM_CONSTANT_Long; }
64 bool is_double() const { return _tag == JVM_CONSTANT_Double; }
65 bool is_name_and_type() const { return _tag == JVM_CONSTANT_NameAndType; }
66 bool is_utf8() const { return _tag == JVM_CONSTANT_Utf8; }
67
68 bool is_invalid() const { return _tag == JVM_CONSTANT_Invalid; }
69
70 bool is_unresolved_klass() const {
71 return _tag == JVM_CONSTANT_UnresolvedClass || _tag == JVM_CONSTANT_UnresolvedClassInError;
72 }
73
74 bool is_unresolved_klass_in_error() const {
75 return _tag == JVM_CONSTANT_UnresolvedClassInError;
76 }
77
78 bool is_method_handle_in_error() const {
79 return _tag == JVM_CONSTANT_MethodHandleInError;
80 }
81 bool is_method_type_in_error() const {
82 return _tag == JVM_CONSTANT_MethodTypeInError;
83 }
84
85 bool is_dynamic_constant_in_error() const {
86 return _tag == JVM_CONSTANT_DynamicInError;
87 }
88
89 bool is_in_error() const {
90 return is_unresolved_klass_in_error() ||
91 is_method_handle_in_error() ||
92 is_method_type_in_error() ||
93 is_dynamic_constant_in_error();
94 }
95
105 bool is_method_handle() const { return _tag == JVM_CONSTANT_MethodHandle; }
106 bool is_dynamic_constant() const { return _tag == JVM_CONSTANT_Dynamic; }
107 bool is_invoke_dynamic() const { return _tag == JVM_CONSTANT_InvokeDynamic; }
108
109 bool has_bootstrap() const {
110 return (_tag == JVM_CONSTANT_Dynamic ||
111 _tag == JVM_CONSTANT_DynamicInError ||
112 _tag == JVM_CONSTANT_InvokeDynamic);
113 }
114
115 bool is_loadable_constant() const {
116 return ((_tag >= JVM_CONSTANT_Integer && _tag <= JVM_CONSTANT_String) ||
117 is_method_type() || is_method_handle() || is_dynamic_constant() ||
118 is_unresolved_klass());
119 }
120
121 constantTag() {
122 _tag = JVM_CONSTANT_Invalid;
123 }
124 constantTag(jbyte tag) {
125 assert((tag >= 0 && tag <= JVM_CONSTANT_NameAndType) ||
126 (tag >= JVM_CONSTANT_MethodHandle && tag <= JVM_CONSTANT_InvokeDynamic) ||
127 (tag >= JVM_CONSTANT_InternalMin && tag <= JVM_CONSTANT_InternalMax), "Invalid constant tag");
128 _tag = tag;
129 }
130
131 static jbyte type2tag(BasicType bt) {
132 if (is_subword_type(bt)) {
133 bt = T_INT;
134 }
135 if (bt == T_ARRAY) {
136 bt = T_OBJECT;
137 }
138 switch (bt) {
139 case T_INT: return JVM_CONSTANT_Integer;
140 case T_LONG: return JVM_CONSTANT_Long;
141 case T_FLOAT: return JVM_CONSTANT_Float;
142 case T_DOUBLE: return JVM_CONSTANT_Double;
143 case T_OBJECT: return JVM_CONSTANT_String;
144
145 default:
146 assert(false, "not supported: %s", type2name(bt));
147 return JVM_CONSTANT_Invalid;
148 }
149 }
150
151 jbyte value() const { return _tag; }
152 jbyte error_value() const;
153 jbyte non_error_value() const;
154
155 BasicType basic_type() const; // if used with ldc, what kind of value gets pushed?
156
157 const char* internal_name() const; // for error reporting
158
159 void print_on(outputStream* st) const PRODUCT_RETURN;
160 };
161
162 #endif // SHARE_UTILITIES_CONSTANTTAG_HPP
|
22 *
23 */
24
25 #ifndef SHARE_UTILITIES_CONSTANTTAG_HPP
26 #define SHARE_UTILITIES_CONSTANTTAG_HPP
27
28 #include "utilities/globalDefinitions.hpp"
29
30
31 class outputStream;
32
33 // constant tags in Java .class files
34
35 enum {
36 // See jvm.h for shared JVM_CONSTANT_XXX tags
37 // NOTE: replicated in SA in vm/agent/sun/jvm/hotspot/utilities/ConstantTag.java
38 // Hotspot specific tags
39 JVM_CONSTANT_Invalid = 0, // For bad value initialization
40 JVM_CONSTANT_InternalMin = 100, // First implementation tag (aside from bad value of course)
41 JVM_CONSTANT_UnresolvedClass = 100, // Temporary tag until actual use
42 JVM_CONSTANT_ClassIndex = 101, // Temporary tag while constructing constant pool, class redefinition
43 JVM_CONSTANT_StringIndex = 102, // Temporary tag while constructing constant pool, class redefinition
44 JVM_CONSTANT_UnresolvedClassInError = 103, // Error tag due to resolution error
45 JVM_CONSTANT_MethodHandleInError = 104, // Error tag due to resolution error
46 JVM_CONSTANT_MethodTypeInError = 105, // Error tag due to resolution error
47 JVM_CONSTANT_DynamicInError = 106, // Error tag due to resolution error
48 JVM_CONSTANT_InternalMax = 106, // Last implementation tag
49 // internal constant tag flags
50 JVM_CONSTANT_QDescBit = (1 << 7) // Separate bit, encode Q type descriptors
51 };
52
53 class constantTag {
54 private:
55 jbyte _tag;
56 public:
57 bool is_klass() const { return value() == 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 value() == JVM_CONSTANT_UnresolvedClass || value() == JVM_CONSTANT_UnresolvedClassInError;
73 }
74
75 bool is_unresolved_klass_in_error() const {
76 return value() == JVM_CONSTANT_UnresolvedClassInError;
77 }
78
79 bool is_Qdescriptor_klass() const {
80 return (_tag & JVM_CONSTANT_QDescBit) != 0;
81 }
82
83 bool is_method_handle_in_error() const {
84 return _tag == JVM_CONSTANT_MethodHandleInError;
85 }
86 bool is_method_type_in_error() const {
87 return _tag == JVM_CONSTANT_MethodTypeInError;
88 }
89
90 bool is_dynamic_constant_in_error() const {
91 return _tag == JVM_CONSTANT_DynamicInError;
92 }
93
94 bool is_in_error() const {
95 return is_unresolved_klass_in_error() ||
96 is_method_handle_in_error() ||
97 is_method_type_in_error() ||
98 is_dynamic_constant_in_error();
99 }
100
110 bool is_method_handle() const { return _tag == JVM_CONSTANT_MethodHandle; }
111 bool is_dynamic_constant() const { return _tag == JVM_CONSTANT_Dynamic; }
112 bool is_invoke_dynamic() const { return _tag == JVM_CONSTANT_InvokeDynamic; }
113
114 bool has_bootstrap() const {
115 return (_tag == JVM_CONSTANT_Dynamic ||
116 _tag == JVM_CONSTANT_DynamicInError ||
117 _tag == JVM_CONSTANT_InvokeDynamic);
118 }
119
120 bool is_loadable_constant() const {
121 return ((_tag >= JVM_CONSTANT_Integer && _tag <= JVM_CONSTANT_String) ||
122 is_method_type() || is_method_handle() || is_dynamic_constant() ||
123 is_unresolved_klass());
124 }
125
126 constantTag() {
127 _tag = JVM_CONSTANT_Invalid;
128 }
129 constantTag(jbyte tag) {
130 jbyte entry_tag = tag & ~JVM_CONSTANT_QDescBit;
131 assert((((tag & JVM_CONSTANT_QDescBit) == 0) && (entry_tag >= 0 && entry_tag <= JVM_CONSTANT_NameAndType) ||
132 (entry_tag >= JVM_CONSTANT_MethodHandle && entry_tag <= JVM_CONSTANT_InvokeDynamic) ||
133 (entry_tag >= JVM_CONSTANT_InternalMin && entry_tag <= JVM_CONSTANT_InternalMax))
134 || (((tag & JVM_CONSTANT_QDescBit) != 0) && (entry_tag == JVM_CONSTANT_Class ||
135 entry_tag == JVM_CONSTANT_UnresolvedClass || entry_tag == JVM_CONSTANT_UnresolvedClassInError
136 || entry_tag == JVM_CONSTANT_ClassIndex))
137 , "Invalid constant tag");
138 _tag = tag;
139 }
140
141 static jbyte type2tag(BasicType bt) {
142 if (is_subword_type(bt)) {
143 bt = T_INT;
144 }
145 if (bt == T_ARRAY) {
146 bt = T_OBJECT;
147 }
148 switch (bt) {
149 case T_INT: return JVM_CONSTANT_Integer;
150 case T_LONG: return JVM_CONSTANT_Long;
151 case T_FLOAT: return JVM_CONSTANT_Float;
152 case T_DOUBLE: return JVM_CONSTANT_Double;
153 case T_OBJECT: return JVM_CONSTANT_String;
154
155 default:
156 assert(false, "not supported: %s", type2name(bt));
157 return JVM_CONSTANT_Invalid;
158 }
159 }
160
161 jbyte value() const { return _tag & ~JVM_CONSTANT_QDescBit; }
162 jbyte tag() const { return _tag; }
163 jbyte error_value() const;
164 jbyte non_error_value() const;
165
166 BasicType basic_type() const; // if used with ldc, what kind of value gets pushed?
167
168 const char* internal_name() const; // for error reporting
169
170 void print_on(outputStream* st) const PRODUCT_RETURN;
171 };
172
173 #endif // SHARE_UTILITIES_CONSTANTTAG_HPP
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