1 /*
2 * Copyright (c) 1997, 2014, 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 "classfile/altHashing.hpp"
27 #include "classfile/javaClasses.hpp"
28 #include "oops/oop.inline.hpp"
29 #include "runtime/handles.inline.hpp"
30 #include "runtime/thread.inline.hpp"
31 #include "utilities/copy.hpp"
32
33 PRAGMA_FORMAT_MUTE_WARNINGS_FOR_GCC
34
35 bool always_do_update_barrier = false;
36
37 BarrierSet* oopDesc::_bs = NULL;
38
print_on(outputStream * st) const39 void oopDesc::print_on(outputStream* st) const {
40 if (this == NULL) {
41 st->print_cr("NULL");
42 } else {
43 klass()->oop_print_on(oop(this), st);
44 }
45 }
46
print_address_on(outputStream * st) const47 void oopDesc::print_address_on(outputStream* st) const {
48 if (PrintOopAddress) {
49 st->print("{" INTPTR_FORMAT "}", this);
50 }
51 }
52
print()53 void oopDesc::print() { print_on(tty); }
54
print_address()55 void oopDesc::print_address() { print_address_on(tty); }
56
print_string()57 char* oopDesc::print_string() {
58 stringStream st;
59 print_on(&st);
60 return st.as_string();
61 }
62
print_value()63 void oopDesc::print_value() {
64 print_value_on(tty);
65 }
66
print_value_string()67 char* oopDesc::print_value_string() {
68 char buf[100];
69 stringStream st(buf, sizeof(buf));
70 print_value_on(&st);
71 return st.as_string();
72 }
73
print_value_on(outputStream * st) const74 void oopDesc::print_value_on(outputStream* st) const {
75 oop obj = oop(this);
76 if (this == NULL) {
77 st->print("NULL");
78 } else if (java_lang_String::is_instance(obj)) {
79 java_lang_String::print(obj, st);
80 if (PrintOopAddress) print_address_on(st);
81 } else {
82 klass()->oop_print_value_on(obj, st);
83 }
84 }
85
86
verify_on(outputStream * st)87 void oopDesc::verify_on(outputStream* st) {
88 if (this != NULL) {
89 klass()->oop_verify_on(this, st);
90 }
91 }
92
93
verify()94 void oopDesc::verify() {
95 verify_on(tty);
96 }
97
slow_identity_hash()98 intptr_t oopDesc::slow_identity_hash() {
99 // slow case; we have to acquire the micro lock in order to locate the header
100 ResetNoHandleMark rnm; // Might be called from LEAF/QUICK ENTRY
101 HandleMark hm;
102 Handle object(this);
103 return ObjectSynchronizer::identity_hash_value_for(object);
104 }
105
106 // When String table needs to rehash
new_hash(juint seed)107 unsigned int oopDesc::new_hash(juint seed) {
108 EXCEPTION_MARK;
109 ResourceMark rm;
110 int length;
111 jchar* chars = java_lang_String::as_unicode_string(this, length, THREAD);
112 if (chars != NULL) {
113 // Use alternate hashing algorithm on the string
114 return AltHashing::halfsiphash_32(seed, chars, length);
115 } else {
116 vm_exit_out_of_memory(length, OOM_MALLOC_ERROR, "unable to create Unicode strings for String table rehash");
117 return 0;
118 }
119 }
120
121 VerifyOopClosure VerifyOopClosure::verify_oop;
122
do_oop(oop * p)123 void VerifyOopClosure::do_oop(oop* p) { VerifyOopClosure::do_oop_work(p); }
do_oop(narrowOop * p)124 void VerifyOopClosure::do_oop(narrowOop* p) { VerifyOopClosure::do_oop_work(p); }
125