1 /*
2 * Copyright (c) 2014, 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 *
27 #include "gc/shared/gcId.hpp"
28 #include "runtime/safepoint.hpp"
29 #include "runtime/thread.inline.hpp"
30
31 uint GCId::_next_id = 0;
32
33 NamedThread* currentNamedthread() {
34 assert(Thread::current()->is_Named_thread(), "This thread must be NamedThread");
35 return (NamedThread*)Thread::current();
36 }
37
38 const uint GCId::create() {
39 return _next_id++;
40 }
41
42 const uint GCId::peek() {
43 return _next_id;
44 }
45
46 const uint GCId::current() {
47 assert(currentNamedthread()->gc_id() != undefined(), "Using undefined GC id.");
48 return current_raw();
49 }
50
51 const uint GCId::current_raw() {
52 return currentNamedthread()->gc_id();
53 }
54
55 size_t GCId::print_prefix(char* buf, size_t len) {
56 Thread* thread = Thread::current_or_null();
57 if (thread != NULL && thread->is_Named_thread()) {
58 uint gc_id = current_raw();
59 if (gc_id != undefined()) {
60 int ret = jio_snprintf(buf, len, "GC(%u) ", gc_id);
61 assert(ret > 0, "Failed to print prefix. Log buffer too small?");
62 return (size_t)ret;
63 }
64 }
65 return 0;
66 }
67
68 GCIdMark::GCIdMark() : _gc_id(GCId::create()) {
69 currentNamedthread()->set_gc_id(_gc_id);
70 }
71
72 GCIdMark::GCIdMark(uint gc_id) : _gc_id(gc_id) {
73 currentNamedthread()->set_gc_id(_gc_id);
74 }
75
76 GCIdMark::~GCIdMark() {
77 currentNamedthread()->set_gc_id(GCId::undefined());
78 }
79
80 GCIdMarkAndRestore::GCIdMarkAndRestore() : _gc_id(GCId::create()) {
81 _previous_gc_id = GCId::current_raw();
82 currentNamedthread()->set_gc_id(_gc_id);
83 }
84
85 GCIdMarkAndRestore::GCIdMarkAndRestore(uint gc_id) : _gc_id(gc_id) {
86 _previous_gc_id = GCId::current_raw();
87 currentNamedthread()->set_gc_id(_gc_id);
88 }
89
90 GCIdMarkAndRestore::~GCIdMarkAndRestore() {
91 currentNamedthread()->set_gc_id(_previous_gc_id);
92 }
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1 /*
2 * Copyright (c) 2014, 2018, 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 *
27 #include "gc/shared/gcId.hpp"
28 #include "runtime/safepoint.hpp"
29 #include "runtime/thread.inline.hpp"
30
31 uint GCId::_next_id = 0;
32
33 NamedThread* currentNamedthread() {
34 assert(Thread::current()->is_Named_thread(), "This thread must be NamedThread");
35 return (NamedThread*)Thread::current();
36 }
37
38 const uint GCId::create() {
39 return _next_id++;
40 }
41
42 const uint GCId::peek() {
43 return _next_id;
44 }
45
46 const uint GCId::current() {
47 const uint gc_id = currentNamedthread()->gc_id();
48 assert(gc_id != undefined(), "Using undefined GC id.");
49 return gc_id;
50 }
51
52 const uint GCId::current_or_undefined() {
53 return Thread::current()->is_Named_thread() ? currentNamedthread()->gc_id() : undefined();
54 }
55
56 size_t GCId::print_prefix(char* buf, size_t len) {
57 Thread* thread = Thread::current_or_null();
58 if (thread != NULL) {
59 uint gc_id = current_or_undefined();
60 if (gc_id != undefined()) {
61 int ret = jio_snprintf(buf, len, "GC(%u) ", gc_id);
62 assert(ret > 0, "Failed to print prefix. Log buffer too small?");
63 return (size_t)ret;
64 }
65 }
66 return 0;
67 }
68
69 GCIdMark::GCIdMark() : _gc_id(GCId::create()) {
70 currentNamedthread()->set_gc_id(_gc_id);
71 }
72
73 GCIdMark::GCIdMark(uint gc_id) : _gc_id(gc_id) {
74 currentNamedthread()->set_gc_id(_gc_id);
75 }
76
77 GCIdMark::~GCIdMark() {
78 currentNamedthread()->set_gc_id(GCId::undefined());
79 }
80
81 GCIdMarkAndRestore::GCIdMarkAndRestore() : _gc_id(GCId::create()) {
82 _previous_gc_id = currentNamedthread()->gc_id();
83 currentNamedthread()->set_gc_id(_gc_id);
84 }
85
86 GCIdMarkAndRestore::GCIdMarkAndRestore(uint gc_id) : _gc_id(gc_id) {
87 _previous_gc_id = currentNamedthread()->gc_id();
88 currentNamedthread()->set_gc_id(_gc_id);
89 }
90
91 GCIdMarkAndRestore::~GCIdMarkAndRestore() {
92 currentNamedthread()->set_gc_id(_previous_gc_id);
93 }
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