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/*
* Copyright (c) 2018, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation.
*
* This code is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
* or visit www.oracle.com if you need additional information or have any
* questions.
*/
/*
* @test
*
* @summary converted from VM Testbase nsk/jvmti/ClassFileLoadHook/classfloadhk008.
* VM Testbase keywords: [quick, jpda, jvmti, noras, redefine]
* VM Testbase readme:
* DESCRIPTION
* This JVMTI test exercises JVMTI event ClassFileLoadHook().
* This test checks if CLASS_FILE_LOAD_HOOK event is received
* for class being redefined and the new instrumented bytecode
* returned from this event callback will be used for tested
* class after redefinition.
* The tested class is loaded with default classloader.
* This test uses three different bytecodes of the tested class
* 'classfloadhk008r' compiled from the different sources.
* This directory contains original source of the tested class,
* which is used to load class with default loader in debuggee class.
* The subdirectory 'newclass' contains redefined class
* with changed implementation of methods.
* The subdirectory 'newclass01' contains new instrumented class
* with one more changed implementation of methods.
* The test performs the following checks:
* - CLASS_FILE_LOAD_HOOK event callback is invoked and only once
* for the tested class upon its redefinition
* - pointers to new redefined bytecode and size passed to
* the event callback are not NULL
* - the new instrumented bytecode is successfully returned
* from the event callback
* - the new instrumented bytecode of the tested class is actually
* used after class redefinition
* The debuggee class preliminary loads redefined and instrumented
* bytecodes of the tested class into static fields and agent gets
* these bytecodes to use them in CLASS_FILE_LOAD_HOOK event callback.
* The debuggee loads tested class using default classloader.
* The agent enables CLASS_FILE_LOAD_HOOK event and redefines
* tested class with the redefined bytecode.
* Upon receiving CLASS_FILE_LOAD_HOOK event the agent performs checks
* and replaces redefined bytecode with the new instrumented bytecode.
* If no CLASS_FILE_LOAD_HOOK events were received, the agent
* complains an error.
* After tested class has been redefined debuggee uses reflection
* API to call static method of this class. If method returns value
* according to the new instrumented implementation, then the new
* bytecode was actually used for creation of tested class. Otherwise,
* if method returns value according to the original or redefined
* implementation, or any unexpected value, then the test complains
* an error.
* The agent does not deallocate memory used for instrumented
* bytecode, because this is VM responsibility.
* If all checks are successfull, the test passes with exit code 95,
* otherwise the test fails with exit code 97.
* COMMENTS
* Modified due to fix of the rfe
* 5010823 TEST_RFE: some JVMTI tests use the replaced capability
*
* @library /vmTestbase
* /test/lib
* @run driver jdk.test.lib.FileInstaller . .
* @build nsk.jvmti.ClassFileLoadHook.classfloadhk008
* nsk.jvmti.ClassFileLoadHook.classfloadhk008r
*
* @comment compile newclassXX to bin/newclassXX
* @run driver nsk.share.ExtraClassesBuilder
* newclass newclass01
*
* @run main/othervm/native
* -agentlib:classfloadhk008=-waittime=5
* nsk.jvmti.ClassFileLoadHook.classfloadhk008
* ./bin
*/
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