0N/A#
2362N/A# Copyright (c) 2004, 2007, Oracle and/or its affiliates. All rights reserved.
0N/A#
0N/A# Redistribution and use in source and binary forms, with or without
0N/A# modification, are permitted provided that the following conditions
0N/A# are met:
0N/A#
0N/A# - Redistributions of source code must retain the above copyright
0N/A# notice, this list of conditions and the following disclaimer.
0N/A#
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.
0N/A#
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#
0N/A# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
0N/A# IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
0N/A# THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
0N/A# PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
0N/A# CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
0N/A# EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
0N/A# PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
0N/A# PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
0N/A# LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
0N/A# NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
0N/A# SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
0N/A#
0N/A
0N/AheapViewer
0N/A
0N/AThis agent library demonstrates how to get an easy view of the
0N/Aheap in terms of total object count and space used.
0N/AIt uses GetLoadedClasses(), SetTag(), and IterateThroughHeap()
0N/Ato count up all the objects of all the current loaded classes.
0N/AThe heap dump will happen at the event JVMTI_EVENT_VM_DEATH, or the
0N/Aevent JVMTI_EVENT_DATA_DUMP_REQUEST.
0N/A
0N/AIt also demonstrates some more robust agent error handling using
0N/AGetErrorName(),
0N/A
0N/AUsing the heap iterate functions, lots of statistics can be generated
0N/Awithout resorting to using Byte Code Instrumentation (BCI).
0N/A
0N/AYou can use this agent library as follows:
0N/A
0N/A java -agentlib:heapViewer ...
0N/A
0N/ATo get help on the available options try:
0N/A
0N/A java -agentlib:heapViewer=help
0N/A
0N/ASee ${JAVA_HOME}/demo/jvmti/index.html for help running and building agents.
0N/A