1 /*
2 * Copyright (c) 2017, 2024, 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 #include "precompiled.hpp"
26 #include "accessBackend.inline.hpp"
27 #include "gc/shared/collectedHeap.hpp"
28 #include "oops/oop.inline.hpp"
29 #include "runtime/javaThread.inline.hpp"
30 #include "runtime/mutexLocker.hpp"
31 #include "utilities/copy.hpp"
32 #include "utilities/debug.hpp"
33 #include "utilities/vmError.hpp"
34
35 #if defined(TARGET_COMPILER_gcc)
36 #define HIDDEN __attribute__ ((visibility ("hidden")))
37 #else
38 #define HIDDEN
39 #endif
40
41 namespace AccessInternal {
42 // These forward copying calls to Copy without exposing the Copy type in headers unnecessarily
43
44 void arraycopy_arrayof_conjoint_oops(void* src, void* dst, size_t length) {
45 Copy::arrayof_conjoint_oops(reinterpret_cast<HeapWord*>(src),
46 reinterpret_cast<HeapWord*>(dst), length);
47 }
48
49 void arraycopy_conjoint_oops(oop* src, oop* dst, size_t length) {
50 Copy::conjoint_oops_atomic(src, dst, length);
51 }
52
53 void arraycopy_conjoint_oops(narrowOop* src, narrowOop* dst, size_t length) {
54 Copy::conjoint_oops_atomic(src, dst, length);
55 }
56
57 void arraycopy_disjoint_words(void* src, void* dst, size_t length) {
58 Copy::disjoint_words(reinterpret_cast<HeapWord*>(src),
59 reinterpret_cast<HeapWord*>(dst), length);
60 }
61
62 void arraycopy_disjoint_words_atomic(void* src, void* dst, size_t length) {
63 Copy::disjoint_words_atomic(reinterpret_cast<HeapWord*>(src),
64 reinterpret_cast<HeapWord*>(dst), length);
65 }
66
67 template<> HIDDEN
68 void arraycopy_conjoint<jboolean>(jboolean* src, jboolean* dst, size_t length) {
69 Copy::conjoint_jbytes(reinterpret_cast<jbyte*>(src), reinterpret_cast<jbyte*>(dst), length);
70 }
71
72 template<> HIDDEN
73 void arraycopy_conjoint<jbyte>(jbyte* src, jbyte* dst, size_t length) {
74 Copy::conjoint_jbytes(src, dst, length);
75 }
76
77 template<> HIDDEN
78 void arraycopy_conjoint<jchar>(jchar* src, jchar* dst, size_t length) {
79 Copy::conjoint_jshorts_atomic(reinterpret_cast<jshort*>(src), reinterpret_cast<jshort*>(dst), length);
80 }
81
82 template<> HIDDEN
83 void arraycopy_conjoint<jshort>(jshort* src, jshort* dst, size_t length) {
84 Copy::conjoint_jshorts_atomic(src, dst, length);
85 }
86
87 template<> HIDDEN
88 void arraycopy_conjoint<jint>(jint* src, jint* dst, size_t length) {
89 Copy::conjoint_jints_atomic(src, dst, length);
90 }
91
92 template<> HIDDEN
93 void arraycopy_conjoint<jfloat>(jfloat* src, jfloat* dst, size_t length) {
94 Copy::conjoint_jints_atomic(reinterpret_cast<jint*>(src), reinterpret_cast<jint*>(dst), length);
95 }
96
97 template<> HIDDEN
98 void arraycopy_conjoint<jlong>(jlong* src, jlong* dst, size_t length) {
99 Copy::conjoint_jlongs_atomic(src, dst, length);
100 }
101
102 template<> HIDDEN
103 void arraycopy_conjoint<jdouble>(jdouble* src, jdouble* dst, size_t length) {
104 Copy::conjoint_jlongs_atomic(reinterpret_cast<jlong*>(src), reinterpret_cast<jlong*>(dst), length);
105 }
106
107 template<> HIDDEN
108 void arraycopy_arrayof_conjoint<jbyte>(jbyte* src, jbyte* dst, size_t length) {
109 Copy::arrayof_conjoint_jbytes(reinterpret_cast<HeapWord*>(src),
110 reinterpret_cast<HeapWord*>(dst),
111 length);
112 }
113
114 template<> HIDDEN
115 void arraycopy_arrayof_conjoint<jshort>(jshort* src, jshort* dst, size_t length) {
116 Copy::arrayof_conjoint_jshorts(reinterpret_cast<HeapWord*>(src),
117 reinterpret_cast<HeapWord*>(dst),
118 length);
119 }
120
121 template<> HIDDEN
122 void arraycopy_arrayof_conjoint<jint>(jint* src, jint* dst, size_t length) {
123 Copy::arrayof_conjoint_jints(reinterpret_cast<HeapWord*>(src),
124 reinterpret_cast<HeapWord*>(dst),
125 length);
126 }
127
128 template<> HIDDEN
129 void arraycopy_arrayof_conjoint<jlong>(jlong* src, jlong* dst, size_t length) {
130 Copy::arrayof_conjoint_jlongs(reinterpret_cast<HeapWord*>(src),
131 reinterpret_cast<HeapWord*>(dst),
132 length);
133 }
134
135 template<> HIDDEN
136 void arraycopy_conjoint<void>(void* src, void* dst, size_t length) {
137 Copy::conjoint_jbytes(reinterpret_cast<jbyte*>(src),
138 reinterpret_cast<jbyte*>(dst),
139 length);
140 }
141
142 template<> HIDDEN
143 void arraycopy_conjoint_atomic<jbyte>(jbyte* src, jbyte* dst, size_t length) {
144 Copy::conjoint_jbytes_atomic(src, dst, length);
145 }
146
147 template<> HIDDEN
148 void arraycopy_conjoint_atomic<jshort>(jshort* src, jshort* dst, size_t length) {
149 Copy::conjoint_jshorts_atomic(src, dst, length);
150 }
151
152 template<> HIDDEN
153 void arraycopy_conjoint_atomic<jint>(jint* src, jint* dst, size_t length) {
154 Copy::conjoint_jints_atomic(src, dst, length);
155 }
156
157 template<> HIDDEN
158 void arraycopy_conjoint_atomic<jlong>(jlong* src, jlong* dst, size_t length) {
159 Copy::conjoint_jlongs_atomic(src, dst, length);
160 }
161
162 template<> HIDDEN
163 void arraycopy_conjoint_atomic<void>(void* src, void* dst, size_t length) {
164 Copy::conjoint_memory_atomic(src, dst, length);
165 }
166
167 void value_copy_internal(void* src, void* dst, size_t length) {
168 Copy::copy_value_content(src, dst, length);
169 }
170
171 #ifdef ASSERT
172 void check_access_thread_state() {
173 if (VMError::is_error_reported() || DebuggingContext::is_enabled()) {
174 return;
175 }
176
177 Thread* thread = Thread::current();
178 if (!thread->is_Java_thread()) {
179 return;
180 }
181
182 JavaThread* java_thread = JavaThread::cast(thread);
183 JavaThreadState state = java_thread->thread_state();
184 assert(state == _thread_in_vm || state == _thread_in_Java || state == _thread_new,
185 "Wrong thread state for accesses: %d", (int)state);
186 }
187 #endif
188 }