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
32void 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
37void 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}
41void 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}
45void 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
51typeArrayOop 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}
56unsigned 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}
61bool 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}
68int java_lang_String::length(oop java_string) {
69  assert(initialized, "Must be initialized");
70  assert(is_instance(java_string), "must be java_string");
71  typeArrayOop value_array = ((typeArrayOop)java_string->obj_field(value_offset));
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
83bool java_lang_String::is_instance_inlined(oop obj) {
84  return obj != NULL && obj->klass() == SystemDictionary::String_klass();
85}
86
87// Accessors
88oop java_lang_ref_Reference::referent(oop ref) {
89  return ref->obj_field(referent_offset);
90}
91void java_lang_ref_Reference::set_referent(oop ref, oop value) {
92  ref->obj_field_put(referent_offset, value);
93}
94void java_lang_ref_Reference::set_referent_raw(oop ref, oop value) {
95  ref->obj_field_put_raw(referent_offset, value);
96}
97HeapWord* java_lang_ref_Reference::referent_addr(oop ref) {
98  return ref->obj_field_addr<HeapWord>(referent_offset);
99}
100oop java_lang_ref_Reference::next(oop ref) {
101  return ref->obj_field(next_offset);
102}
103void java_lang_ref_Reference::set_next(oop ref, oop value) {
104  ref->obj_field_put(next_offset, value);
105}
106void java_lang_ref_Reference::set_next_raw(oop ref, oop value) {
107  ref->obj_field_put_raw(next_offset, value);
108}
109HeapWord* java_lang_ref_Reference::next_addr(oop ref) {
110  return ref->obj_field_addr<HeapWord>(next_offset);
111}
112oop java_lang_ref_Reference::discovered(oop ref) {
113  return ref->obj_field(discovered_offset);
114}
115void java_lang_ref_Reference::set_discovered(oop ref, oop value) {
116  ref->obj_field_put(discovered_offset, value);
117}
118void java_lang_ref_Reference::set_discovered_raw(oop ref, oop value) {
119  ref->obj_field_put_raw(discovered_offset, value);
120}
121HeapWord* java_lang_ref_Reference::discovered_addr(oop ref) {
122  return ref->obj_field_addr<HeapWord>(discovered_offset);
123}
124
125inline void java_lang_invoke_CallSite::set_target_volatile(oop site, oop target) {
126  site->obj_field_put_volatile(_target_offset, target);
127}
128
129inline oop  java_lang_invoke_CallSite::target(oop site) {
130  return site->obj_field(_target_offset);
131}
132
133inline void java_lang_invoke_CallSite::set_target(oop site, oop target) {
134  site->obj_field_put(_target_offset, target);
135}
136
137inline bool java_lang_invoke_CallSite::is_instance(oop obj) {
138  return obj != NULL && is_subclass(obj->klass());
139}
140
141inline bool java_lang_invoke_MethodHandleNatives_CallSiteContext::is_instance(oop obj) {
142  return obj != NULL && is_subclass(obj->klass());
143}
144
145inline bool java_lang_invoke_MemberName::is_instance(oop obj) {
146  return obj != NULL && obj->klass() == SystemDictionary::MemberName_klass();
147}
148
149inline bool java_lang_invoke_ResolvedMethodName::is_instance(oop obj) {
150  return obj != NULL && obj->klass() == SystemDictionary::ResolvedMethodName_klass();
151}
152
153inline bool java_lang_invoke_MethodType::is_instance(oop obj) {
154  return obj != NULL && obj->klass() == SystemDictionary::MethodType_klass();
155}
156
157inline bool java_lang_invoke_MethodHandle::is_instance(oop obj) {
158  return obj != NULL && is_subclass(obj->klass());
159}
160
161inline bool java_lang_Class::is_instance(oop obj) {
162  return obj != NULL && obj->klass() == SystemDictionary::Class_klass();
163}
164
165inline bool java_lang_invoke_DirectMethodHandle::is_instance(oop obj) {
166  return obj != NULL && is_subclass(obj->klass());
167}
168
169inline bool java_lang_Module::is_instance(oop obj) {
170  return obj != NULL && obj->klass() == SystemDictionary::Module_klass();
171}
172
173inline 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
180inline 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
187inline int Backtrace::bci_at(unsigned int merged) {
188  return extract_high_short_from_int(merged);
189}
190
191inline int Backtrace::version_at(unsigned int merged) {
192  return extract_low_short_from_int(merged);
193}
194
195inline int Backtrace::mid_at(unsigned int merged) {
196  return extract_high_short_from_int(merged);
197}
198
199inline int Backtrace::cpref_at(unsigned int merged) {
200  return extract_low_short_from_int(merged);
201}
202
203inline 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
220inline 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
234