22 *
23 */
24
25 #include "ci/ciConstant.hpp"
26 #include "ci/ciField.hpp"
27 #include "ci/ciInstance.hpp"
28 #include "ci/ciInstanceKlass.hpp"
29 #include "ci/ciNullObject.hpp"
30 #include "ci/ciUtilities.inline.hpp"
31 #include "classfile/javaClasses.inline.hpp"
32 #include "classfile/vmClasses.hpp"
33 #include "oops/oop.inline.hpp"
34
35 // ciInstance
36 //
37 // This class represents an instanceOop in the HotSpot virtual
38 // machine.
39
40 // ------------------------------------------------------------------
41 // ciObject::java_mirror_type
42 ciType* ciInstance::java_mirror_type() {
43 VM_ENTRY_MARK;
44 oop m = get_oop();
45 // Return null if it is not java.lang.Class.
46 if (m == nullptr || m->klass() != vmClasses::Class_klass()) {
47 return nullptr;
48 }
49 // Return either a primitive type or a klass.
50 if (java_lang_Class::is_primitive(m)) {
51 return ciType::make(java_lang_Class::primitive_type(m));
52 } else {
53 Klass* k = java_lang_Class::as_Klass(m);
54 assert(k != nullptr, "");
55 return CURRENT_THREAD_ENV->get_klass(k);
56 }
57 }
58
59 // ------------------------------------------------------------------
60 // ciInstance::field_value_impl
61 ciConstant ciInstance::field_value_impl(BasicType field_btype, int offset) {
62 ciConstant value = check_constant_value_cache(offset, field_btype);
63 if (value.is_valid()) {
64 return value;
65 }
66 VM_ENTRY_MARK;
67 oop obj = get_oop();
68 assert(obj != nullptr, "bad oop");
69 switch(field_btype) {
70 case T_BYTE: value = ciConstant(field_btype, obj->byte_field(offset)); break;
71 case T_CHAR: value = ciConstant(field_btype, obj->char_field(offset)); break;
72 case T_SHORT: value = ciConstant(field_btype, obj->short_field(offset)); break;
73 case T_BOOLEAN: value = ciConstant(field_btype, obj->bool_field(offset)); break;
74 case T_INT: value = ciConstant(field_btype, obj->int_field(offset)); break;
90 value = ciConstant(field_btype, ciNullObject::make());
91 } else {
92 value = ciConstant(field_btype, CURRENT_ENV->get_object(o));
93 }
94 break;
95 }
96 default:
97 fatal("no field value: %s", type2name(field_btype));
98 }
99 add_to_constant_value_cache(offset, value);
100 return value;
101 }
102
103 // ------------------------------------------------------------------
104 // ciInstance::field_value
105 //
106 // Constant value of a field.
107 ciConstant ciInstance::field_value(ciField* field) {
108 assert(is_loaded(), "invalid access - must be loaded");
109 assert(field->holder()->is_loaded(), "invalid access - holder must be loaded");
110 assert(field->is_static() || klass()->is_subclass_of(field->holder()), "invalid access - must be subclass");
111 return field_value_impl(field->type()->basic_type(), field->offset_in_bytes());
112 }
113
114 // ------------------------------------------------------------------
115 // ciInstance::field_value_by_offset
116 //
117 // Constant value of a field at the specified offset.
118 ciConstant ciInstance::field_value_by_offset(int field_offset) {
119 ciInstanceKlass* ik = klass()->as_instance_klass();
120 ciField* field = ik->get_field_by_offset(field_offset, false);
121 if (field == nullptr)
122 return ciConstant(); // T_ILLEGAL
123 return field_value(field);
124 }
125
126 // ------------------------------------------------------------------
127 // ciInstance::print_impl
128 //
129 // Implementation of the print method.
130 void ciInstance::print_impl(outputStream* st) {
|
22 *
23 */
24
25 #include "ci/ciConstant.hpp"
26 #include "ci/ciField.hpp"
27 #include "ci/ciInstance.hpp"
28 #include "ci/ciInstanceKlass.hpp"
29 #include "ci/ciNullObject.hpp"
30 #include "ci/ciUtilities.inline.hpp"
31 #include "classfile/javaClasses.inline.hpp"
32 #include "classfile/vmClasses.hpp"
33 #include "oops/oop.inline.hpp"
34
35 // ciInstance
36 //
37 // This class represents an instanceOop in the HotSpot virtual
38 // machine.
39
40 // ------------------------------------------------------------------
41 // ciObject::java_mirror_type
42 ciType* ciInstance::java_mirror_type(bool* is_null_free_array) {
43 VM_ENTRY_MARK;
44 oop m = get_oop();
45 // Return null if it is not java.lang.Class.
46 if (m == nullptr || m->klass() != vmClasses::Class_klass()) {
47 return nullptr;
48 }
49 // Return either a primitive type or a klass.
50 if (java_lang_Class::is_primitive(m)) {
51 return ciType::make(java_lang_Class::primitive_type(m));
52 } else {
53 Klass* k = java_lang_Class::as_Klass(m);
54 assert(k != nullptr, "");
55 if (is_null_free_array != nullptr && (k->is_array_klass() && k->is_null_free_array_klass())) {
56 *is_null_free_array = true;
57 }
58 return CURRENT_THREAD_ENV->get_klass(k);
59 }
60 }
61
62 // ------------------------------------------------------------------
63 // ciInstance::field_value_impl
64 ciConstant ciInstance::field_value_impl(BasicType field_btype, int offset) {
65 ciConstant value = check_constant_value_cache(offset, field_btype);
66 if (value.is_valid()) {
67 return value;
68 }
69 VM_ENTRY_MARK;
70 oop obj = get_oop();
71 assert(obj != nullptr, "bad oop");
72 switch(field_btype) {
73 case T_BYTE: value = ciConstant(field_btype, obj->byte_field(offset)); break;
74 case T_CHAR: value = ciConstant(field_btype, obj->char_field(offset)); break;
75 case T_SHORT: value = ciConstant(field_btype, obj->short_field(offset)); break;
76 case T_BOOLEAN: value = ciConstant(field_btype, obj->bool_field(offset)); break;
77 case T_INT: value = ciConstant(field_btype, obj->int_field(offset)); break;
93 value = ciConstant(field_btype, ciNullObject::make());
94 } else {
95 value = ciConstant(field_btype, CURRENT_ENV->get_object(o));
96 }
97 break;
98 }
99 default:
100 fatal("no field value: %s", type2name(field_btype));
101 }
102 add_to_constant_value_cache(offset, value);
103 return value;
104 }
105
106 // ------------------------------------------------------------------
107 // ciInstance::field_value
108 //
109 // Constant value of a field.
110 ciConstant ciInstance::field_value(ciField* field) {
111 assert(is_loaded(), "invalid access - must be loaded");
112 assert(field->holder()->is_loaded(), "invalid access - holder must be loaded");
113 assert(field->is_static() || field->holder()->is_inlinetype() || klass()->is_subclass_of(field->holder()),
114 "invalid access - must be subclass");
115
116 return field_value_impl(field->type()->basic_type(), field->offset_in_bytes());
117 }
118
119 // ------------------------------------------------------------------
120 // ciInstance::field_value_by_offset
121 //
122 // Constant value of a field at the specified offset.
123 ciConstant ciInstance::field_value_by_offset(int field_offset) {
124 ciInstanceKlass* ik = klass()->as_instance_klass();
125 ciField* field = ik->get_field_by_offset(field_offset, false);
126 if (field == nullptr)
127 return ciConstant(); // T_ILLEGAL
128 return field_value(field);
129 }
130
131 // ------------------------------------------------------------------
132 // ciInstance::print_impl
133 //
134 // Implementation of the print method.
135 void ciInstance::print_impl(outputStream* st) {
|