1 /*
2 * Copyright (c) 2015, 2017, 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/oop.inline.hpp"
30 #include "oops/oopsHierarchy.hpp"
31
32 void java_lang_String::set_coder(oop string, jbyte coder) {
33 assert(initialized && (coder_offset > 0), "Must be initialized");
34 string->byte_field_put(coder_offset, coder);
35 }
36
37 void java_lang_String::set_value_raw(oop string, typeArrayOop buffer) {
38 assert(initialized, "Must be initialized");
39 string->obj_field_put_raw(value_offset, buffer);
40 }
41 void java_lang_String::set_value(oop string, typeArrayOop buffer) {
42 assert(initialized && (value_offset > 0), "Must be initialized");
43 string->obj_field_put(value_offset, (oop)buffer);
44 }
45 void java_lang_String::set_hash(oop string, unsigned int hash) {
46 assert(initialized && (hash_offset > 0), "Must be initialized");
47 string->int_field_put(hash_offset, hash);
48 }
49
50 // Accessors
51 typeArrayOop java_lang_String::value(oop java_string) {
52 assert(initialized && (value_offset > 0), "Must be initialized");
53 assert(is_instance(java_string), "must be java_string");
54 return (typeArrayOop) java_string->obj_field(value_offset);
55 }
56 unsigned int java_lang_String::hash(oop java_string) {
57 assert(initialized && (hash_offset > 0), "Must be initialized");
58 assert(is_instance(java_string), "must be java_string");
59 return java_string->int_field(hash_offset);
60 }
61 bool java_lang_String::is_latin1(oop java_string) {
62 assert(initialized && (coder_offset > 0), "Must be initialized");
63 assert(is_instance(java_string), "must be java_string");
64 jbyte coder = java_string->byte_field(coder_offset);
65 assert(CompactStrings || coder == CODER_UTF16, "Must be UTF16 without CompactStrings");
66 return coder == CODER_LATIN1;
67 }
68
69 int java_lang_String::length(oop java_string, typeArrayOop value_array) {
70 assert(initialized, "Must be initialized");
71 assert(is_instance(java_string), "must be java_string");
72 if (value_array == NULL) {
73 return 0;
74 }
75 int arr_length = value_array->length();
76 if (!is_latin1(java_string)) {
77 assert((arr_length & 1) == 0, "should be even for UTF16 string");
78 arr_length >>= 1; // convert number of bytes to number of elements
79 }
80 return arr_length;
81 }
82 int java_lang_String::length(oop java_string) {
83 typeArrayOop value_array = (typeArrayOop)java_string->obj_field(value_offset);
84 return length(java_string, value_array);
85 }
86
87 bool java_lang_String::is_instance_inlined(oop obj) {
88 return obj != NULL && obj->klass() == SystemDictionary::String_klass();
89 }
90
91 // Accessors
92 oop java_lang_ref_Reference::referent(oop ref) {
93 return ref->obj_field(referent_offset);
94 }
95 void java_lang_ref_Reference::set_referent(oop ref, oop value) {
96 ref->obj_field_put(referent_offset, value);
97 }
98 void java_lang_ref_Reference::set_referent_raw(oop ref, oop value) {
99 ref->obj_field_put_raw(referent_offset, value);
100 }
101 HeapWord* java_lang_ref_Reference::referent_addr(oop ref) {
102 return ref->obj_field_addr<HeapWord>(referent_offset);
103 }
104 oop java_lang_ref_Reference::next(oop ref) {
105 return ref->obj_field(next_offset);
106 }
107 void java_lang_ref_Reference::set_next(oop ref, oop value) {
108 ref->obj_field_put(next_offset, value);
109 }
110 void java_lang_ref_Reference::set_next_raw(oop ref, oop value) {
111 ref->obj_field_put_raw(next_offset, value);
112 }
113 HeapWord* java_lang_ref_Reference::next_addr(oop ref) {
114 return ref->obj_field_addr<HeapWord>(next_offset);
115 }
116 oop java_lang_ref_Reference::discovered(oop ref) {
117 return ref->obj_field(discovered_offset);
118 }
119 void java_lang_ref_Reference::set_discovered(oop ref, oop value) {
120 ref->obj_field_put(discovered_offset, value);
121 }
122 void java_lang_ref_Reference::set_discovered_raw(oop ref, oop value) {
123 ref->obj_field_put_raw(discovered_offset, value);
124 }
125 HeapWord* java_lang_ref_Reference::discovered_addr(oop ref) {
126 return ref->obj_field_addr<HeapWord>(discovered_offset);
127 }
128
129 inline void java_lang_invoke_CallSite::set_target_volatile(oop site, oop target) {
130 site->obj_field_put_volatile(_target_offset, target);
131 }
132
133 inline oop java_lang_invoke_CallSite::target(oop site) {
134 return site->obj_field(_target_offset);
135 }
136
137 inline void java_lang_invoke_CallSite::set_target(oop site, oop target) {
138 site->obj_field_put(_target_offset, target);
139 }
140
141 inline bool java_lang_invoke_CallSite::is_instance(oop obj) {
142 return obj != NULL && is_subclass(obj->klass());
143 }
144
145 inline bool java_lang_invoke_MethodHandleNatives_CallSiteContext::is_instance(oop obj) {
146 return obj != NULL && is_subclass(obj->klass());
147 }
148
149 inline bool java_lang_invoke_MemberName::is_instance(oop obj) {
150 return obj != NULL && is_subclass(obj->klass());
151 }
152
153 inline bool java_lang_invoke_MethodType::is_instance(oop obj) {
154 return obj != NULL && obj->klass() == SystemDictionary::MethodType_klass();
155 }
156
157 inline bool java_lang_invoke_MethodHandle::is_instance(oop obj) {
158 return obj != NULL && is_subclass(obj->klass());
159 }
160
161 inline bool java_lang_Class::is_instance(oop obj) {
162 return obj != NULL && obj->klass() == SystemDictionary::Class_klass();
163 }
164
165 inline bool java_lang_invoke_DirectMethodHandle::is_instance(oop obj) {
166 return obj != NULL && is_subclass(obj->klass());
167 }
168
169 inline bool java_lang_Module::is_instance(oop obj) {
170 return obj != NULL && obj->klass() == SystemDictionary::Module_klass();
171 }
172
173 inline int Backtrace::merge_bci_and_version(int bci, int version) {
174 // only store u2 for version, checking for overflow.
175 if (version > USHRT_MAX || version < 0) version = USHRT_MAX;
176 assert((jushort)bci == bci, "bci should be short");
177 return build_int_from_shorts(version, bci);
178 }
179
180 inline int Backtrace::merge_mid_and_cpref(int mid, int cpref) {
181 // only store u2 for mid and cpref, checking for overflow.
182 assert((jushort)mid == mid, "mid should be short");
183 assert((jushort)cpref == cpref, "cpref should be short");
184 return build_int_from_shorts(cpref, mid);
185 }
186
187 inline int Backtrace::bci_at(unsigned int merged) {
188 return extract_high_short_from_int(merged);
189 }
190
191 inline int Backtrace::version_at(unsigned int merged) {
192 return extract_low_short_from_int(merged);
193 }
194
195 inline int Backtrace::mid_at(unsigned int merged) {
196 return extract_high_short_from_int(merged);
197 }
198
199 inline int Backtrace::cpref_at(unsigned int merged) {
200 return extract_low_short_from_int(merged);
201 }
202
203 inline int Backtrace::get_line_number(const methodHandle& method, int bci) {
204 int line_number = 0;
205 if (method->is_native()) {
206 // Negative value different from -1 below, enabling Java code in
207 // class java.lang.StackTraceElement to distinguish "native" from
208 // "no LineNumberTable". JDK tests for -2.
209 line_number = -2;
210 } else {
211 // Returns -1 if no LineNumberTable, and otherwise actual line number
212 line_number = method->line_number_from_bci(bci);
213 if (line_number == -1 && ShowHiddenFrames) {
214 line_number = bci + 1000000;
215 }
216 }
217 return line_number;
218 }
219
220 inline Symbol* Backtrace::get_source_file_name(InstanceKlass* holder, int version) {
221 // RedefineClasses() currently permits redefine operations to
222 // happen in parallel using a "last one wins" philosophy. That
223 // spec laxness allows the constant pool entry associated with
224 // the source_file_name_index for any older constant pool version
225 // to be unstable so we shouldn't try to use it.
226 if (holder->constants()->version() != version) {
227 return NULL;
228 } else {
229 return holder->source_file_name();
230 }
231 }
232
233 #endif // SHARE_VM_CLASSFILE_JAVACLASSES_INLINE_HPP