1 /*
2 * Copyright (c) 2015, 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_CLASSFILE_JAVACLASSES_INLINE_HPP
26 #define SHARE_CLASSFILE_JAVACLASSES_INLINE_HPP
27
28 #include "classfile/javaClasses.hpp"
29 #include "oops/access.inline.hpp"
30 #include "oops/oop.inline.hpp"
31 #include "oops/oopsHierarchy.hpp"
32
33 void java_lang_String::set_coder(oop string, jbyte coder) {
34 assert(initialized && (coder_offset > 0), "Must be initialized");
35 string->byte_field_put(coder_offset, coder);
36 }
37
38 void java_lang_String::set_value_raw(oop string, typeArrayOop buffer) {
39 assert(initialized, "Must be initialized");
40 string->obj_field_put_raw(value_offset, buffer);
41 }
42
43 void java_lang_String::set_value(oop string, typeArrayOop buffer) {
44 assert(initialized && (value_offset > 0), "Must be initialized");
45 string->obj_field_put(value_offset, (oop)buffer);
46 }
47
48 void java_lang_String::set_hash(oop string, unsigned int hash) {
49 assert(initialized && (hash_offset > 0), "Must be initialized");
50 string->int_field_put(hash_offset, hash);
51 }
52
53 // Accessors
54 bool java_lang_String::value_equals(typeArrayOop str_value1, typeArrayOop str_value2) {
55 return (oopDesc::equals(str_value1, str_value2) ||
56 (str_value1->length() == str_value2->length() &&
57 (!memcmp(str_value1->base(T_BYTE),
58 str_value2->base(T_BYTE),
59 str_value2->length() * sizeof(jbyte)))));
60 }
61
62 typeArrayOop java_lang_String::value(oop java_string) {
63 assert(initialized && (value_offset > 0), "Must be initialized");
64 assert(is_instance(java_string), "must be java_string");
65 return (typeArrayOop) java_string->obj_field(value_offset);
66 }
67
68 typeArrayOop java_lang_String::value_no_keepalive(oop java_string) {
69 assert(initialized && (value_offset > 0), "Must be initialized");
70 assert(is_instance(java_string), "must be java_string");
71 return (typeArrayOop) java_string->obj_field_access<AS_NO_KEEPALIVE>(value_offset);
72 }
73
74 unsigned int java_lang_String::hash(oop java_string) {
75 assert(initialized && (hash_offset > 0), "Must be initialized");
76 assert(is_instance(java_string), "must be java_string");
77 return java_string->int_field(hash_offset);
78 }
79
80 bool java_lang_String::is_latin1(oop java_string) {
81 assert(initialized && (coder_offset > 0), "Must be initialized");
82 assert(is_instance(java_string), "must be java_string");
83 jbyte coder = java_string->byte_field(coder_offset);
84 assert(CompactStrings || coder == CODER_UTF16, "Must be UTF16 without CompactStrings");
85 return coder == CODER_LATIN1;
86 }
87
88 int java_lang_String::length(oop java_string, typeArrayOop value) {
89 assert(initialized, "Must be initialized");
90 assert(is_instance(java_string), "must be java_string");
91 assert(value_equals(value, java_lang_String::value(java_string)),
92 "value must be equal to java_lang_String::value(java_string)");
93 if (value == NULL) {
94 return 0;
95 }
96 int arr_length = value->length();
97 if (!is_latin1(java_string)) {
98 assert((arr_length & 1) == 0, "should be even for UTF16 string");
99 arr_length >>= 1; // convert number of bytes to number of elements
100 }
101 return arr_length;
102 }
103
104 int java_lang_String::length(oop java_string) {
105 assert(initialized, "Must be initialized");
106 assert(is_instance(java_string), "must be java_string");
107 typeArrayOop value = java_lang_String::value_no_keepalive(java_string);
108 return length(java_string, value);
109 }
110
111 bool java_lang_String::is_instance_inlined(oop obj) {
112 return obj != NULL && obj->klass() == SystemDictionary::String_klass();
113 }
114
115 // Accessors
116 oop java_lang_ref_Reference::referent(oop ref) {
117 return ref->obj_field(referent_offset);
118 }
119
120 void java_lang_ref_Reference::set_referent(oop ref, oop value) {
121 ref->obj_field_put(referent_offset, value);
122 }
123
124 void java_lang_ref_Reference::set_referent_raw(oop ref, oop value) {
125 ref->obj_field_put_raw(referent_offset, value);
126 }
127
128 HeapWord* java_lang_ref_Reference::referent_addr_raw(oop ref) {
129 return ref->obj_field_addr_raw<HeapWord>(referent_offset);
130 }
131
132 oop java_lang_ref_Reference::next(oop ref) {
133 return ref->obj_field(next_offset);
134 }
135
136 void java_lang_ref_Reference::set_next(oop ref, oop value) {
137 ref->obj_field_put(next_offset, value);
138 }
139
140 void java_lang_ref_Reference::set_next_raw(oop ref, oop value) {
141 ref->obj_field_put_raw(next_offset, value);
142 }
143
144 HeapWord* java_lang_ref_Reference::next_addr_raw(oop ref) {
145 return ref->obj_field_addr_raw<HeapWord>(next_offset);
146 }
147
148 oop java_lang_ref_Reference::discovered(oop ref) {
149 return ref->obj_field(discovered_offset);
150 }
151
152 void java_lang_ref_Reference::set_discovered(oop ref, oop value) {
153 ref->obj_field_put(discovered_offset, value);
154 }
155
156 void java_lang_ref_Reference::set_discovered_raw(oop ref, oop value) {
157 ref->obj_field_put_raw(discovered_offset, value);
158 }
159
160 HeapWord* java_lang_ref_Reference::discovered_addr_raw(oop ref) {
161 return ref->obj_field_addr_raw<HeapWord>(discovered_offset);
162 }
163
164 bool java_lang_ref_Reference::is_final(oop ref) {
165 return InstanceKlass::cast(ref->klass())->reference_type() == REF_FINAL;
166 }
167
168 bool java_lang_ref_Reference::is_phantom(oop ref) {
169 return InstanceKlass::cast(ref->klass())->reference_type() == REF_PHANTOM;
170 }
171
172 inline void java_lang_invoke_CallSite::set_target_volatile(oop site, oop target) {
173 site->obj_field_put_volatile(_target_offset, target);
174 }
175
176 inline oop java_lang_invoke_CallSite::target(oop site) {
177 return site->obj_field(_target_offset);
178 }
179
180 inline void java_lang_invoke_CallSite::set_target(oop site, oop target) {
181 site->obj_field_put(_target_offset, target);
182 }
183
184 inline bool java_lang_invoke_CallSite::is_instance(oop obj) {
185 return obj != NULL && is_subclass(obj->klass());
186 }
187
188 inline bool java_lang_invoke_MethodHandleNatives_CallSiteContext::is_instance(oop obj) {
189 return obj != NULL && is_subclass(obj->klass());
190 }
191
192 inline bool java_lang_invoke_MemberName::is_instance(oop obj) {
193 return obj != NULL && obj->klass() == SystemDictionary::MemberName_klass();
194 }
195
196 inline bool java_lang_invoke_ResolvedMethodName::is_instance(oop obj) {
197 return obj != NULL && obj->klass() == SystemDictionary::ResolvedMethodName_klass();
198 }
199
200 inline bool java_lang_invoke_MethodType::is_instance(oop obj) {
201 return obj != NULL && obj->klass() == SystemDictionary::MethodType_klass();
202 }
203
204 inline bool java_lang_invoke_MethodHandle::is_instance(oop obj) {
205 return obj != NULL && is_subclass(obj->klass());
206 }
207
208 inline bool java_lang_Class::is_instance(oop obj) {
209 return obj != NULL && obj->klass() == SystemDictionary::Class_klass();
210 }
211
212 inline bool java_lang_Class::is_primitive(oop java_class) {
213 // should assert:
214 //assert(java_lang_Class::is_instance(java_class), "must be a Class object");
215 bool is_primitive = (java_class->metadata_field(_klass_offset) == NULL);
216
217 #ifdef ASSERT
218 if (is_primitive) {
219 Klass* k = ((Klass*)java_class->metadata_field(_array_klass_offset));
220 assert(k == NULL || is_java_primitive(ArrayKlass::cast(k)->element_type()),
221 "Should be either the T_VOID primitive or a java primitive");
222 }
223 #endif
224
225 return is_primitive;
226 }
227
228 inline int java_lang_Class::oop_size_raw(oop java_class) {
229 assert(_oop_size_offset != 0, "must be set");
230 int size = java_class->int_field_raw(_oop_size_offset);
231 assert(size > 0, "Oop size must be greater than zero, not %d", size);
232 return size;
233 }
234
235 inline bool java_lang_invoke_DirectMethodHandle::is_instance(oop obj) {
236 return obj != NULL && is_subclass(obj->klass());
237 }
238
239 inline bool java_lang_Module::is_instance(oop obj) {
240 return obj != NULL && obj->klass() == SystemDictionary::Module_klass();
241 }
242
243 inline int Backtrace::merge_bci_and_version(int bci, int version) {
244 // only store u2 for version, checking for overflow.
245 if (version > USHRT_MAX || version < 0) version = USHRT_MAX;
246 assert((jushort)bci == bci, "bci should be short");
247 return build_int_from_shorts(version, bci);
248 }
249
250 inline int Backtrace::merge_mid_and_cpref(int mid, int cpref) {
251 // only store u2 for mid and cpref, checking for overflow.
252 assert((jushort)mid == mid, "mid should be short");
253 assert((jushort)cpref == cpref, "cpref should be short");
254 return build_int_from_shorts(cpref, mid);
255 }
256
257 inline int Backtrace::bci_at(unsigned int merged) {
258 return extract_high_short_from_int(merged);
259 }
260
261 inline int Backtrace::version_at(unsigned int merged) {
262 return extract_low_short_from_int(merged);
263 }
264
265 inline int Backtrace::mid_at(unsigned int merged) {
266 return extract_high_short_from_int(merged);
267 }
268
269 inline int Backtrace::cpref_at(unsigned int merged) {
270 return extract_low_short_from_int(merged);
271 }
272
273 inline int Backtrace::get_line_number(const methodHandle& method, int bci) {
274 int line_number = 0;
275 if (method->is_native()) {
276 // Negative value different from -1 below, enabling Java code in
277 // class java.lang.StackTraceElement to distinguish "native" from
278 // "no LineNumberTable". JDK tests for -2.
279 line_number = -2;
280 } else {
281 // Returns -1 if no LineNumberTable, and otherwise actual line number
282 line_number = method->line_number_from_bci(bci);
283 if (line_number == -1 && ShowHiddenFrames) {
284 line_number = bci + 1000000;
285 }
286 }
287 return line_number;
288 }
289
290 inline Symbol* Backtrace::get_source_file_name(InstanceKlass* holder, int version) {
291 // RedefineClasses() currently permits redefine operations to
292 // happen in parallel using a "last one wins" philosophy. That
293 // spec laxness allows the constant pool entry associated with
294 // the source_file_name_index for any older constant pool version
295 // to be unstable so we shouldn't try to use it.
296 if (holder->constants()->version() != version) {
297 return NULL;
298 } else {
299 return holder->source_file_name();
300 }
301 }
302
303 #endif // SHARE_CLASSFILE_JAVACLASSES_INLINE_HPP