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/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 oop value = HeapAccess<AS_NO_KEEPALIVE>::oop_load_at(java_string, value_offset);
61 return (typeArrayOop)value;
62 }
63 unsigned int java_lang_String::hash(oop java_string) {
64 assert(initialized && (hash_offset > 0), "Must be initialized");
65 assert(is_instance(java_string), "must be java_string");
66 return java_string->int_field(hash_offset);
67 }
68 bool java_lang_String::is_latin1(oop java_string) {
69 assert(initialized && (coder_offset > 0), "Must be initialized");
70 assert(is_instance(java_string), "must be java_string");
71 jbyte coder = java_string->byte_field(coder_offset);
72 assert(CompactStrings || coder == CODER_UTF16, "Must be UTF16 without CompactStrings");
73 return coder == CODER_LATIN1;
74 }
75 int java_lang_String::length(oop java_string) {
76 typeArrayOop value = java_lang_String::value_no_keepalive(java_string);
77 assert(initialized, "Must be initialized");
78 assert(is_instance(java_string), "must be java_string");
79 if (value == NULL) {
80 return 0;
81 }
82 int arr_length = value->length();
83 if (!is_latin1(java_string)) {
84 assert((arr_length & 1) == 0, "should be even for UTF16 string");
85 arr_length >>= 1; // convert number of bytes to number of elements
86 }
87 return arr_length;
88 }
89
90 bool java_lang_String::is_instance_inlined(oop obj) {
91 return obj != NULL && obj->klass() == SystemDictionary::String_klass();
92 }
93
94 // Accessors
95 oop java_lang_ref_Reference::referent(oop ref) {
96 return ref->obj_field(referent_offset);
97 }
98 void java_lang_ref_Reference::set_referent(oop ref, oop value) {
99 ref->obj_field_put(referent_offset, value);
100 }
101 void java_lang_ref_Reference::set_referent_raw(oop ref, oop value) {
102 ref->obj_field_put_raw(referent_offset, value);
103 }
104 HeapWord* java_lang_ref_Reference::referent_addr(oop ref) {
105 return ref->obj_field_addr<HeapWord>(referent_offset);
106 }
107 oop java_lang_ref_Reference::next(oop ref) {
108 return ref->obj_field(next_offset);
109 }
110 void java_lang_ref_Reference::set_next(oop ref, oop value) {
111 ref->obj_field_put(next_offset, value);
112 }
113 void java_lang_ref_Reference::set_next_raw(oop ref, oop value) {
114 ref->obj_field_put_raw(next_offset, value);
115 }
116 HeapWord* java_lang_ref_Reference::next_addr(oop ref) {
117 return ref->obj_field_addr<HeapWord>(next_offset);
118 }
119 oop java_lang_ref_Reference::discovered(oop ref) {
120 return ref->obj_field(discovered_offset);
121 }
122 void java_lang_ref_Reference::set_discovered(oop ref, oop value) {
123 ref->obj_field_put(discovered_offset, value);
124 }
125 void java_lang_ref_Reference::set_discovered_raw(oop ref, oop value) {
126 ref->obj_field_put_raw(discovered_offset, value);
127 }
128 HeapWord* java_lang_ref_Reference::discovered_addr(oop ref) {
129 return ref->obj_field_addr<HeapWord>(discovered_offset);
130 }
131 bool java_lang_ref_Reference::is_phantom(oop ref) {
132 return InstanceKlass::cast(ref->klass())->reference_type() == REF_PHANTOM;
133 }
134
135 inline void java_lang_invoke_CallSite::set_target_volatile(oop site, oop target) {
136 site->obj_field_put_volatile(_target_offset, target);
137 }
138
139 inline oop java_lang_invoke_CallSite::target(oop site) {
140 return site->obj_field(_target_offset);
141 }
142
143 inline void java_lang_invoke_CallSite::set_target(oop site, oop target) {
144 site->obj_field_put(_target_offset, target);
145 }
146
147 inline bool java_lang_invoke_CallSite::is_instance(oop obj) {
148 return obj != NULL && is_subclass(obj->klass());
149 }
150
151 inline bool java_lang_invoke_MethodHandleNatives_CallSiteContext::is_instance(oop obj) {
152 return obj != NULL && is_subclass(obj->klass());
153 }
154
155 inline bool java_lang_invoke_MemberName::is_instance(oop obj) {
156 return obj != NULL && obj->klass() == SystemDictionary::MemberName_klass();
157 }
158
159 inline bool java_lang_invoke_ResolvedMethodName::is_instance(oop obj) {
160 return obj != NULL && obj->klass() == SystemDictionary::ResolvedMethodName_klass();
161 }
162
163 inline bool java_lang_invoke_MethodType::is_instance(oop obj) {
164 return obj != NULL && obj->klass() == SystemDictionary::MethodType_klass();
165 }
166
167 inline bool java_lang_invoke_MethodHandle::is_instance(oop obj) {
168 return obj != NULL && is_subclass(obj->klass());
169 }
170
171 inline bool java_lang_Class::is_instance(oop obj) {
172 return obj != NULL && obj->klass() == SystemDictionary::Class_klass();
173 }
174
175 inline bool java_lang_invoke_DirectMethodHandle::is_instance(oop obj) {
176 return obj != NULL && is_subclass(obj->klass());
177 }
178
179 inline bool java_lang_Module::is_instance(oop obj) {
180 return obj != NULL && obj->klass() == SystemDictionary::Module_klass();
181 }
182
183 inline int Backtrace::merge_bci_and_version(int bci, int version) {
184 // only store u2 for version, checking for overflow.
185 if (version > USHRT_MAX || version < 0) version = USHRT_MAX;
186 assert((jushort)bci == bci, "bci should be short");
187 return build_int_from_shorts(version, bci);
188 }
189
190 inline int Backtrace::merge_mid_and_cpref(int mid, int cpref) {
191 // only store u2 for mid and cpref, checking for overflow.
192 assert((jushort)mid == mid, "mid should be short");
193 assert((jushort)cpref == cpref, "cpref should be short");
194 return build_int_from_shorts(cpref, mid);
195 }
196
197 inline int Backtrace::bci_at(unsigned int merged) {
198 return extract_high_short_from_int(merged);
199 }
200
201 inline int Backtrace::version_at(unsigned int merged) {
202 return extract_low_short_from_int(merged);
203 }
204
205 inline int Backtrace::mid_at(unsigned int merged) {
206 return extract_high_short_from_int(merged);
207 }
208
209 inline int Backtrace::cpref_at(unsigned int merged) {
210 return extract_low_short_from_int(merged);
211 }
212
213 inline int Backtrace::get_line_number(const methodHandle& method, int bci) {
214 int line_number = 0;
215 if (method->is_native()) {
216 // Negative value different from -1 below, enabling Java code in
217 // class java.lang.StackTraceElement to distinguish "native" from
218 // "no LineNumberTable". JDK tests for -2.
219 line_number = -2;
220 } else {
221 // Returns -1 if no LineNumberTable, and otherwise actual line number
222 line_number = method->line_number_from_bci(bci);
223 if (line_number == -1 && ShowHiddenFrames) {
224 line_number = bci + 1000000;
225 }
226 }
227 return line_number;
228 }
229
230 inline Symbol* Backtrace::get_source_file_name(InstanceKlass* holder, int version) {
231 // RedefineClasses() currently permits redefine operations to
232 // happen in parallel using a "last one wins" philosophy. That
233 // spec laxness allows the constant pool entry associated with
234 // the source_file_name_index for any older constant pool version
235 // to be unstable so we shouldn't try to use it.
236 if (holder->constants()->version() != version) {
237 return NULL;
238 } else {
239 return holder->source_file_name();
240 }
241 }
242
243 #endif // SHARE_VM_CLASSFILE_JAVACLASSES_INLINE_HPP