1 /*
2 * Copyright (c) 2015, 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 *
23 */
24
25 #ifndef SHARE_VM_CLASSFILE_JAVACLASSES_INLINE_HPP
26 #define SHARE_VM_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 void java_lang_String::set_value(oop string, typeArrayOop buffer) {
43 assert(initialized && (value_offset > 0), "Must be initialized");
44 string->obj_field_put(value_offset, (oop)buffer);
45 }
46 void java_lang_String::set_hash(oop string, unsigned int hash) {
47 assert(initialized && (hash_offset > 0), "Must be initialized");
48 string->int_field_put(hash_offset, hash);
49 }
50
51 // Accessors
52 typeArrayOop java_lang_String::value(oop java_string) {
53 assert(initialized && (value_offset > 0), "Must be initialized");
54 assert(is_instance(java_string), "must be java_string");
55 return (typeArrayOop) java_string->obj_field(value_offset);
56 }
57 typeArrayOop java_lang_String::value_no_keepalive(oop java_string) {
58 assert(initialized && (value_offset > 0), "Must be initialized");
59 assert(is_instance(java_string), "must be java_string");
60 return (typeArrayOop) java_string->obj_field_access<AS_NO_KEEPALIVE>(value_offset);
61 }
62 unsigned int java_lang_String::hash(oop java_string) {
63 assert(initialized && (hash_offset > 0), "Must be initialized");
64 assert(is_instance(java_string), "must be java_string");
65 return java_string->int_field(hash_offset);
66 }
67 bool java_lang_String::is_latin1(oop java_string) {
68 assert(initialized && (coder_offset > 0), "Must be initialized");
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 int java_lang_String::length(oop java_string) {
75 assert(initialized, "Must be initialized");
76 assert(is_instance(java_string), "must be java_string");
77 typeArrayOop value = java_lang_String::value_no_keepalive(java_string);
78 if (value == NULL) {
79 return 0;
80 }
81 int arr_length = value->length();
82 if (!is_latin1(java_string)) {
83 assert((arr_length & 1) == 0, "should be even for UTF16 string");
84 arr_length >>= 1; // convert number of bytes to number of elements
85 }
86 return arr_length;
87 }
88
89 bool java_lang_String::is_instance_inlined(oop obj) {
90 return obj != NULL && obj->klass() == SystemDictionary::String_klass();
91 }
92
93 // Accessors
94 oop java_lang_ref_Reference::referent(oop ref) {
95 return ref->obj_field(referent_offset);
96 }
97 void java_lang_ref_Reference::set_referent(oop ref, oop value) {
98 ref->obj_field_put(referent_offset, value);
99 }
100 void java_lang_ref_Reference::set_referent_raw(oop ref, oop value) {
101 ref->obj_field_put_raw(referent_offset, value);
102 }
103 HeapWord* java_lang_ref_Reference::referent_addr_raw(oop ref) {
104 return ref->obj_field_addr_raw<HeapWord>(referent_offset);
105 }
106 oop java_lang_ref_Reference::next(oop ref) {
107 return ref->obj_field(next_offset);
108 }
109 void java_lang_ref_Reference::set_next(oop ref, oop value) {
110 ref->obj_field_put(next_offset, value);
111 }
112 void java_lang_ref_Reference::set_next_raw(oop ref, oop value) {
113 ref->obj_field_put_raw(next_offset, value);
114 }
115 HeapWord* java_lang_ref_Reference::next_addr_raw(oop ref) {
116 return ref->obj_field_addr_raw<HeapWord>(next_offset);
117 }
118 oop java_lang_ref_Reference::discovered(oop ref) {
119 return ref->obj_field(discovered_offset);
120 }
121 void java_lang_ref_Reference::set_discovered(oop ref, oop value) {
122 ref->obj_field_put(discovered_offset, value);
123 }
124 void java_lang_ref_Reference::set_discovered_raw(oop ref, oop value) {
125 ref->obj_field_put_raw(discovered_offset, value);
126 }
127 HeapWord* java_lang_ref_Reference::discovered_addr_raw(oop ref) {
128 return ref->obj_field_addr_raw<HeapWord>(discovered_offset);
129 }
130 bool java_lang_ref_Reference::is_final(oop ref) {
131 return InstanceKlass::cast(ref->klass())->reference_type() == REF_FINAL;
132 }
133 bool java_lang_ref_Reference::is_phantom(oop ref) {
134 return InstanceKlass::cast(ref->klass())->reference_type() == REF_PHANTOM;
135 }
136
137 inline void java_lang_invoke_CallSite::set_target_volatile(oop site, oop target) {
138 site->obj_field_put_volatile(_target_offset, target);
139 }
140
141 inline oop java_lang_invoke_CallSite::target(oop site) {
142 return site->obj_field(_target_offset);
143 }
144
145 inline void java_lang_invoke_CallSite::set_target(oop site, oop target) {
146 site->obj_field_put(_target_offset, target);
147 }
148
149 inline bool java_lang_invoke_CallSite::is_instance(oop obj) {
150 return obj != NULL && is_subclass(obj->klass());
151 }
152
153 inline bool java_lang_invoke_MethodHandleNatives_CallSiteContext::is_instance(oop obj) {
154 return obj != NULL && is_subclass(obj->klass());
155 }
156
157 inline bool java_lang_invoke_MemberName::is_instance(oop obj) {
158 return obj != NULL && obj->klass() == SystemDictionary::MemberName_klass();
159 }
160
161 inline bool java_lang_invoke_ResolvedMethodName::is_instance(oop obj) {
162 return obj != NULL && obj->klass() == SystemDictionary::ResolvedMethodName_klass();
163 }
164
165 inline bool java_lang_invoke_MethodType::is_instance(oop obj) {
166 return obj != NULL && obj->klass() == SystemDictionary::MethodType_klass();
167 }
168
169 inline bool java_lang_invoke_MethodHandle::is_instance(oop obj) {
170 return obj != NULL && is_subclass(obj->klass());
171 }
172
173 inline bool java_lang_Class::is_instance(oop obj) {
174 return obj != NULL && obj->klass() == SystemDictionary::Class_klass();
175 }
176
177 inline bool java_lang_invoke_DirectMethodHandle::is_instance(oop obj) {
178 return obj != NULL && is_subclass(obj->klass());
179 }
180
181 inline bool java_lang_Module::is_instance(oop obj) {
182 return obj != NULL && obj->klass() == SystemDictionary::Module_klass();
183 }
184
185 inline int Backtrace::merge_bci_and_version(int bci, int version) {
186 // only store u2 for version, checking for overflow.
187 if (version > USHRT_MAX || version < 0) version = USHRT_MAX;
188 assert((jushort)bci == bci, "bci should be short");
189 return build_int_from_shorts(version, bci);
190 }
191
192 inline int Backtrace::merge_mid_and_cpref(int mid, int cpref) {
193 // only store u2 for mid and cpref, checking for overflow.
194 assert((jushort)mid == mid, "mid should be short");
195 assert((jushort)cpref == cpref, "cpref should be short");
196 return build_int_from_shorts(cpref, mid);
197 }
198
199 inline int Backtrace::bci_at(unsigned int merged) {
200 return extract_high_short_from_int(merged);
201 }
202
203 inline int Backtrace::version_at(unsigned int merged) {
204 return extract_low_short_from_int(merged);
205 }
206
207 inline int Backtrace::mid_at(unsigned int merged) {
208 return extract_high_short_from_int(merged);
209 }
210
211 inline int Backtrace::cpref_at(unsigned int merged) {
212 return extract_low_short_from_int(merged);
213 }
214
215 inline int Backtrace::get_line_number(const methodHandle& method, int bci) {
216 int line_number = 0;
217 if (method->is_native()) {
218 // Negative value different from -1 below, enabling Java code in
219 // class java.lang.StackTraceElement to distinguish "native" from
220 // "no LineNumberTable". JDK tests for -2.
221 line_number = -2;
222 } else {
223 // Returns -1 if no LineNumberTable, and otherwise actual line number
224 line_number = method->line_number_from_bci(bci);
225 if (line_number == -1 && ShowHiddenFrames) {
226 line_number = bci + 1000000;
227 }
228 }
229 return line_number;
230 }
231
232 inline Symbol* Backtrace::get_source_file_name(InstanceKlass* holder, int version) {
233 // RedefineClasses() currently permits redefine operations to
234 // happen in parallel using a "last one wins" philosophy. That
235 // spec laxness allows the constant pool entry associated with
236 // the source_file_name_index for any older constant pool version
237 // to be unstable so we shouldn't try to use it.
238 if (holder->constants()->version() != version) {
239 return NULL;
240 } else {
241 return holder->source_file_name();
242 }
243 }
244
245 #endif // SHARE_VM_CLASSFILE_JAVACLASSES_INLINE_HPP