2362N/A# Copyright (c) 2004, 2007, Oracle
and/or its affiliates. All rights reserved.
0N/A# Redistribution and use in source and binary forms, with or without
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0N/A# - Redistributions of source code must retain the above copyright
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0N/A# - Redistributions in binary form must reproduce the above copyright
0N/A# notice, this list of conditions and the following disclaimer in the
0N/A# documentation
and/or other materials provided with the distribution.
2362N/A# - Neither the name of Oracle nor the names of its
0N/A# contributors may be used to endorse or promote products derived
0N/A# from this software without specific prior written permission.
0N/A# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
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0N/AThis agent library can be used to track garbage collection events.
0N/AYou can use this agent library as follows:
0N/A java -agentlib:gctest ...
0N/ATo get help on the available options try:
0N/A java -agentlib:gctest=help
0N/AThe Events JVMTI_EVENT_GARBAGE_COLLECTION_START,
0N/AJVMTI_EVENT_GARBAGE_COLLECTION_FINISH, and JVMTI_EVENT_OBJECT_FREE
0N/Aall have limitations as to what can be called directly inside the
0N/Aagent callback functions (
e.g. no JNI calls are allowed, and limited
0N/Ainterface calls can be made). However, by using raw monitors and a separate
0N/Awatcher thread, this agent demonstrates how these limitations can be
0N/Aeasily avoided, allowing the watcher thread to do just about anything
0N/Aafter the JVMTI_EVENT_GARBAGE_COLLECTION_FINISH event.