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/*
* Copyright (c) 2018, 2024, 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
* @key randomness
*
* @summary converted from VM Testbase nsk/jdi/ClassUnloadEvent/classSignature/signature001.
* VM Testbase keywords: [jpda, jdi, nonconcurrent]
* VM Testbase readme:
* DESCRIPTION
* The test exercises
* com.sun.jdi.event.ClassUnloadEvent.classSignature() method.
* The test checks the following assertions:
* - ClassUnloadEvent is always received by debugger
* for unloaded class, interface and array type in target VM,
* - the string returned by classSignature() is not empty and comply
* to JNI-style signature.
* A debugger class - nsk.jdi.ClassUnloadEvent.classSignature.signature001 ;
* a debuggee class - nsk.jdi.ClassUnloadEvent.classSignature.signature001a .
* The test uses supporting nsk/jdi/share classes for launching debuggee
* and for creating communication pipe between debugger and debuggee. The
* debugger and debugee communicates with special commands.
* The debugger forces debugge to load checked classes, creates and
* enables ClassUnloadRequest. Next, debugger forces debuggee to
* unload classes, using memory stressing techique, and waits for
* ClassUnloadEvent.
* If each expected ClassUnloadEvent occurs, debugger tests method
* ClassUnloadEvent.classSignature() and verifies that this event
* is for checked class or interface.
* If no expected ClassUnloadEvent received for WAITTIME period
* but class not found in debuggee, or ClassUnloadEvent received
* but class still in class list, debugger reports an error.
* Test pass even if class leave loaded in debuggee but no
* ClassUnloadEvent received,
* Finally, debugger disables event request to prevent further
* appearing of events, sends debuggee command to quit, clears
* event queue, wait for debugge terminated, and exits.
* The test fails if any of the checks failed.
* PARAMETERS
* 1: String - current test directory.
* COMMENTS
* Test fixed due to bugs:
* 4455653 VMDisconnectedException on resume
* 4463674: TEST_BUG: some JDI tests are timing dependent
* NOTE: testcase for array class is excluded from the test (commented out)
* because of difficulty to provide reliable techique to unload
* such a class.
* Test fixed due to bug:
* 4419078 HS1.4: class isn't unloaded when its classloader is being finalized
* Test fixed due to bug:
* 4642444 TEST_BUG: tests against ClassUnloadEvent fail due to internal ping timeout
* The test was modified to comply with new execution scheme
* to have separate directory for precompiled classes:
* - signature003b and signature003c classes were moved in
* 'loadclass' subdirectory;
* - ${COMMON_CLASSES_LOCATION} instead of ${TESTDIR} in .cfg file;
* - ClassUnloader seekes for classes to load in
* ${COMMON_CLASSES_LOCATION}/loadclass directory.
* Standard method Debugee.endDebugee() is used instead of cleaning
* event queue on debuggee VM exit.
*
* @library /vmTestbase
* /test/lib
* @build nsk.jdi.ClassUnloadEvent.classSignature.signature001
* nsk.jdi.ClassUnloadEvent.classSignature.signature001a
*
* @comment compile loadclassXX to bin/loadclassXX
* @run driver nsk.share.ExtraClassesBuilder
* loadclass
*
* @run driver
* nsk.jdi.ClassUnloadEvent.classSignature.signature001
* ./bin
* -verbose
* -arch=${os.family}-${os.simpleArch}
* -waittime=5
* -debugee.vmkind=java
* -transport.address=dynamic
* -debugee.vmkeys="${test.vm.opts} ${test.java.opts}"
*/
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