| # |
| # Copyright (c) 2004, 2007, Oracle and/or its affiliates. All rights reserved. |
| # |
| # Redistribution and use in source and binary forms, with or without |
| # modification, are permitted provided that the following conditions |
| # are met: |
| # |
| # - Redistributions of source code must retain the above copyright |
| # notice, this list of conditions and the following disclaimer. |
| # |
| # - Redistributions in binary form must reproduce the above copyright |
| # notice, this list of conditions and the following disclaimer in the |
| # documentation and/or other materials provided with the distribution. |
| # |
| # - Neither the name of Oracle nor the names of its |
| # contributors may be used to endorse or promote products derived |
| # from this software without specific prior written permission. |
| # |
| # THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS |
| # IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, |
| # THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR |
| # PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR |
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| # |
| |
| gctest |
| |
| This agent library can be used to track garbage collection events. |
| |
| You can use this agent library as follows: |
| |
| java -agentlib:gctest ... |
| |
| To get help on the available options try: |
| |
| java -agentlib:gctest=help |
| |
| See ${JAVA_HOME}/demo/jvmti/index.html for help running and building agents. |
| |
| The Events JVMTI_EVENT_GARBAGE_COLLECTION_START, |
| JVMTI_EVENT_GARBAGE_COLLECTION_FINISH, and JVMTI_EVENT_OBJECT_FREE |
| all have limitations as to what can be called directly inside the |
| agent callback functions (e.g. no JNI calls are allowed, and limited |
| interface calls can be made). However, by using raw monitors and a separate |
| watcher thread, this agent demonstrates how these limitations can be |
| easily avoided, allowing the watcher thread to do just about anything |
| after the JVMTI_EVENT_GARBAGE_COLLECTION_FINISH event. |
| |
