1 /*
2 * Copyright (c) 2015, 2020, 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
set_coder(oop string,jbyte coder)33 void java_lang_String::set_coder(oop string, jbyte coder) {
34 string->byte_field_put(_coder_offset, coder);
35 }
36
set_value_raw(oop string,typeArrayOop buffer)37 void java_lang_String::set_value_raw(oop string, typeArrayOop buffer) {
38 string->obj_field_put_raw(_value_offset, buffer);
39 }
40
set_value(oop string,typeArrayOop buffer)41 void java_lang_String::set_value(oop string, typeArrayOop buffer) {
42 string->obj_field_put(_value_offset, (oop)buffer);
43 }
44
hash_is_set(oop java_string)45 bool java_lang_String::hash_is_set(oop java_string) {
46 return java_string->int_field(_hash_offset) != 0 || java_string->bool_field(_hashIsZero_offset) != 0;
47 }
48
49 // Accessors
value_equals(typeArrayOop str_value1,typeArrayOop str_value2)50 bool java_lang_String::value_equals(typeArrayOop str_value1, typeArrayOop str_value2) {
51 return ((str_value1 == str_value2) ||
52 (str_value1->length() == str_value2->length() &&
53 (!memcmp(str_value1->base(T_BYTE),
54 str_value2->base(T_BYTE),
55 str_value2->length() * sizeof(jbyte)))));
56 }
57
value(oop java_string)58 typeArrayOop java_lang_String::value(oop java_string) {
59 assert(is_instance(java_string), "must be java_string");
60 return (typeArrayOop) java_string->obj_field(_value_offset);
61 }
62
value_no_keepalive(oop java_string)63 typeArrayOop java_lang_String::value_no_keepalive(oop java_string) {
64 assert(is_instance(java_string), "must be java_string");
65 return (typeArrayOop) java_string->obj_field_access<AS_NO_KEEPALIVE>(_value_offset);
66 }
67
is_latin1(oop java_string)68 bool java_lang_String::is_latin1(oop java_string) {
69 assert(is_instance(java_string), "must be java_string");
70 jbyte coder = java_string->byte_field(_coder_offset);
71 assert(CompactStrings || coder == CODER_UTF16, "Must be UTF16 without CompactStrings");
72 return coder == CODER_LATIN1;
73 }
74
length(oop java_string,typeArrayOop value)75 int java_lang_String::length(oop java_string, typeArrayOop value) {
76 assert(_initialized, "Must be initialized");
77 assert(is_instance(java_string), "must be java_string");
78 assert(value_equals(value, java_lang_String::value(java_string)),
79 "value must be equal to java_lang_String::value(java_string)");
80 if (value == NULL) {
81 return 0;
82 }
83 int arr_length = value->length();
84 if (!is_latin1(java_string)) {
85 assert((arr_length & 1) == 0, "should be even for UTF16 string");
86 arr_length >>= 1; // convert number of bytes to number of elements
87 }
88 return arr_length;
89 }
90
length(oop java_string)91 int java_lang_String::length(oop java_string) {
92 assert(_initialized, "Must be initialized");
93 assert(is_instance(java_string), "must be java_string");
94 typeArrayOop value = java_lang_String::value_no_keepalive(java_string);
95 return length(java_string, value);
96 }
97
is_instance_inlined(oop obj)98 bool java_lang_String::is_instance_inlined(oop obj) {
99 return obj != NULL && obj->klass() == SystemDictionary::String_klass();
100 }
101
102 // Accessors
referent(oop ref)103 oop java_lang_ref_Reference::referent(oop ref) {
104 return ref->obj_field(_referent_offset);
105 }
106
set_referent(oop ref,oop value)107 void java_lang_ref_Reference::set_referent(oop ref, oop value) {
108 ref->obj_field_put(_referent_offset, value);
109 }
110
set_referent_raw(oop ref,oop value)111 void java_lang_ref_Reference::set_referent_raw(oop ref, oop value) {
112 ref->obj_field_put_raw(_referent_offset, value);
113 }
114
referent_addr_raw(oop ref)115 HeapWord* java_lang_ref_Reference::referent_addr_raw(oop ref) {
116 return ref->obj_field_addr_raw<HeapWord>(_referent_offset);
117 }
118
next(oop ref)119 oop java_lang_ref_Reference::next(oop ref) {
120 return ref->obj_field(_next_offset);
121 }
122
set_next(oop ref,oop value)123 void java_lang_ref_Reference::set_next(oop ref, oop value) {
124 ref->obj_field_put(_next_offset, value);
125 }
126
set_next_raw(oop ref,oop value)127 void java_lang_ref_Reference::set_next_raw(oop ref, oop value) {
128 ref->obj_field_put_raw(_next_offset, value);
129 }
130
next_addr_raw(oop ref)131 HeapWord* java_lang_ref_Reference::next_addr_raw(oop ref) {
132 return ref->obj_field_addr_raw<HeapWord>(_next_offset);
133 }
134
discovered(oop ref)135 oop java_lang_ref_Reference::discovered(oop ref) {
136 return ref->obj_field(_discovered_offset);
137 }
138
set_discovered(oop ref,oop value)139 void java_lang_ref_Reference::set_discovered(oop ref, oop value) {
140 ref->obj_field_put(_discovered_offset, value);
141 }
142
set_discovered_raw(oop ref,oop value)143 void java_lang_ref_Reference::set_discovered_raw(oop ref, oop value) {
144 ref->obj_field_put_raw(_discovered_offset, value);
145 }
146
discovered_addr_raw(oop ref)147 HeapWord* java_lang_ref_Reference::discovered_addr_raw(oop ref) {
148 return ref->obj_field_addr_raw<HeapWord>(_discovered_offset);
149 }
150
is_final(oop ref)151 bool java_lang_ref_Reference::is_final(oop ref) {
152 return InstanceKlass::cast(ref->klass())->reference_type() == REF_FINAL;
153 }
154
is_phantom(oop ref)155 bool java_lang_ref_Reference::is_phantom(oop ref) {
156 return InstanceKlass::cast(ref->klass())->reference_type() == REF_PHANTOM;
157 }
158
set_target_volatile(oop site,oop target)159 inline void java_lang_invoke_CallSite::set_target_volatile(oop site, oop target) {
160 site->obj_field_put_volatile(_target_offset, target);
161 }
162
target(oop site)163 inline oop java_lang_invoke_CallSite::target(oop site) {
164 return site->obj_field(_target_offset);
165 }
166
set_target(oop site,oop target)167 inline void java_lang_invoke_CallSite::set_target(oop site, oop target) {
168 site->obj_field_put(_target_offset, target);
169 }
170
is_instance(oop obj)171 inline bool java_lang_invoke_CallSite::is_instance(oop obj) {
172 return obj != NULL && is_subclass(obj->klass());
173 }
174
is_frozen(oop site)175 inline jboolean java_lang_invoke_ConstantCallSite::is_frozen(oop site) {
176 return site->bool_field(_is_frozen_offset);
177 }
178
is_instance(oop obj)179 inline bool java_lang_invoke_ConstantCallSite::is_instance(oop obj) {
180 return obj != NULL && is_subclass(obj->klass());
181 }
182
is_instance(oop obj)183 inline bool java_lang_invoke_MethodHandleNatives_CallSiteContext::is_instance(oop obj) {
184 return obj != NULL && is_subclass(obj->klass());
185 }
186
is_instance(oop obj)187 inline bool java_lang_invoke_MemberName::is_instance(oop obj) {
188 return obj != NULL && obj->klass() == SystemDictionary::MemberName_klass();
189 }
190
is_instance(oop obj)191 inline bool java_lang_invoke_ResolvedMethodName::is_instance(oop obj) {
192 return obj != NULL && obj->klass() == SystemDictionary::ResolvedMethodName_klass();
193 }
194
is_instance(oop obj)195 inline bool java_lang_invoke_MethodType::is_instance(oop obj) {
196 return obj != NULL && obj->klass() == SystemDictionary::MethodType_klass();
197 }
198
is_instance(oop obj)199 inline bool java_lang_invoke_MethodHandle::is_instance(oop obj) {
200 return obj != NULL && is_subclass(obj->klass());
201 }
202
is_instance(oop obj)203 inline bool java_lang_Class::is_instance(oop obj) {
204 return obj != NULL && obj->klass() == SystemDictionary::Class_klass();
205 }
206
as_Klass(oop java_class)207 inline Klass* java_lang_Class::as_Klass(oop java_class) {
208 //%note memory_2
209 assert(java_lang_Class::is_instance(java_class), "must be a Class object");
210 Klass* k = ((Klass*)java_class->metadata_field(_klass_offset));
211 assert(k == NULL || k->is_klass(), "type check");
212 return k;
213 }
214
is_primitive(oop java_class)215 inline bool java_lang_Class::is_primitive(oop java_class) {
216 // should assert:
217 //assert(java_lang_Class::is_instance(java_class), "must be a Class object");
218 bool is_primitive = (java_class->metadata_field(_klass_offset) == NULL);
219
220 #ifdef ASSERT
221 if (is_primitive) {
222 Klass* k = ((Klass*)java_class->metadata_field(_array_klass_offset));
223 assert(k == NULL || is_java_primitive(ArrayKlass::cast(k)->element_type()),
224 "Should be either the T_VOID primitive or a java primitive");
225 }
226 #endif
227
228 return is_primitive;
229 }
230
oop_size_raw(oop java_class)231 inline int java_lang_Class::oop_size_raw(oop java_class) {
232 assert(_oop_size_offset != 0, "must be set");
233 int size = java_class->int_field_raw(_oop_size_offset);
234 assert(size > 0, "Oop size must be greater than zero, not %d", size);
235 return size;
236 }
237
is_instance(oop obj)238 inline bool java_lang_invoke_DirectMethodHandle::is_instance(oop obj) {
239 return obj != NULL && is_subclass(obj->klass());
240 }
241
is_instance(oop obj)242 inline bool java_lang_Module::is_instance(oop obj) {
243 return obj != NULL && obj->klass() == SystemDictionary::Module_klass();
244 }
245
merge_bci_and_version(int bci,int version)246 inline int Backtrace::merge_bci_and_version(int bci, int version) {
247 // only store u2 for version, checking for overflow.
248 if (version > USHRT_MAX || version < 0) version = USHRT_MAX;
249 assert((jushort)bci == bci, "bci should be short");
250 return build_int_from_shorts(version, bci);
251 }
252
merge_mid_and_cpref(int mid,int cpref)253 inline int Backtrace::merge_mid_and_cpref(int mid, int cpref) {
254 // only store u2 for mid and cpref, checking for overflow.
255 assert((jushort)mid == mid, "mid should be short");
256 assert((jushort)cpref == cpref, "cpref should be short");
257 return build_int_from_shorts(cpref, mid);
258 }
259
bci_at(unsigned int merged)260 inline int Backtrace::bci_at(unsigned int merged) {
261 return extract_high_short_from_int(merged);
262 }
263
version_at(unsigned int merged)264 inline int Backtrace::version_at(unsigned int merged) {
265 return extract_low_short_from_int(merged);
266 }
267
mid_at(unsigned int merged)268 inline int Backtrace::mid_at(unsigned int merged) {
269 return extract_high_short_from_int(merged);
270 }
271
cpref_at(unsigned int merged)272 inline int Backtrace::cpref_at(unsigned int merged) {
273 return extract_low_short_from_int(merged);
274 }
275
get_line_number(Method * method,int bci)276 inline int Backtrace::get_line_number(Method* method, int bci) {
277 int line_number = 0;
278 if (method->is_native()) {
279 // Negative value different from -1 below, enabling Java code in
280 // class java.lang.StackTraceElement to distinguish "native" from
281 // "no LineNumberTable". JDK tests for -2.
282 line_number = -2;
283 } else {
284 // Returns -1 if no LineNumberTable, and otherwise actual line number
285 line_number = method->line_number_from_bci(bci);
286 }
287 return line_number;
288 }
289
get_source_file_name(InstanceKlass * holder,int version)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
304