1 /*
2 * Copyright (c) 1997, 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 *
118 // Print the contents of the log
119 void print_log_on(outputStream* out);
120
121 private:
122 void print_log_impl(outputStream* out);
123
124 // Print a single element. A templated implementation might need to
125 // be declared by subclasses.
126 void print(outputStream* out, T& e);
127
128 void print(outputStream* out, EventRecord<T>& e) {
129 out->print("Event: %.3f ", e.timestamp);
130 if (e.thread != NULL) {
131 out->print("Thread " INTPTR_FORMAT " ", p2i(e.thread));
132 }
133 print(out, e.data);
134 }
135 };
136
137 // A simple wrapper class for fixed size text messages.
138 class StringLogMessage : public FormatBuffer<256> {
139 public:
140 // Wrap this buffer in a stringStream.
141 stringStream stream() {
142 return stringStream(_buf, size());
143 }
144 };
145
146 // A simple ring buffer of fixed size text messages.
147 class StringEventLog : public EventLogBase<StringLogMessage> {
148 public:
149 StringEventLog(const char* name, int count = LogEventsBufferEntries) : EventLogBase<StringLogMessage>(name, count) {}
150
151 void logv(Thread* thread, const char* format, va_list ap) ATTRIBUTE_PRINTF(3, 0) {
152 if (!should_log()) return;
153
154 double timestamp = fetch_timestamp();
155 MutexLockerEx ml(&_mutex, Mutex::_no_safepoint_check_flag);
156 int index = compute_log_index();
157 _records[index].thread = thread;
158 _records[index].timestamp = timestamp;
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1 /*
2 * Copyright (c) 1997, 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 *
118 // Print the contents of the log
119 void print_log_on(outputStream* out);
120
121 private:
122 void print_log_impl(outputStream* out);
123
124 // Print a single element. A templated implementation might need to
125 // be declared by subclasses.
126 void print(outputStream* out, T& e);
127
128 void print(outputStream* out, EventRecord<T>& e) {
129 out->print("Event: %.3f ", e.timestamp);
130 if (e.thread != NULL) {
131 out->print("Thread " INTPTR_FORMAT " ", p2i(e.thread));
132 }
133 print(out, e.data);
134 }
135 };
136
137 // A simple wrapper class for fixed size text messages.
138 class StringLogMessage : public FormatBufferEx<1024> {
139 public:
140 // Wrap this buffer in a stringStream.
141 stringStream stream() {
142 return stringStream(_buf, size());
143 }
144 };
145
146 // A simple ring buffer of fixed size text messages.
147 class StringEventLog : public EventLogBase<StringLogMessage> {
148 public:
149 StringEventLog(const char* name, int count = LogEventsBufferEntries) : EventLogBase<StringLogMessage>(name, count) {}
150
151 void logv(Thread* thread, const char* format, va_list ap) ATTRIBUTE_PRINTF(3, 0) {
152 if (!should_log()) return;
153
154 double timestamp = fetch_timestamp();
155 MutexLockerEx ml(&_mutex, Mutex::_no_safepoint_check_flag);
156 int index = compute_log_index();
157 _records[index].thread = thread;
158 _records[index].timestamp = timestamp;
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