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/*
* Copyright (c) 2019, 2021, 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.
*/
#include "precompiled.hpp"
#include "classfile/vmClasses.hpp"
#include "memory/resourceArea.hpp"
#include "memory/universe.hpp"
#include "oops/instanceKlass.hpp"
#include "oops/oop.inline.hpp"
#include "runtime/atomic.hpp"
#include "runtime/interfaceSupport.inline.hpp"
#include "runtime/orderAccess.hpp"
#include "runtime/os.hpp"
#include "runtime/semaphore.inline.hpp"
#include "runtime/synchronizer.hpp"
#include "threadHelper.inline.hpp"
#include "unittest.hpp"
#include "utilities/globalDefinitions.hpp"
#include "utilities/ostream.hpp"
// The test doesn't work for PRODUCT because it needs WizardMode
#ifndef PRODUCT
static bool test_pattern(stringStream* st, const char* pattern) {
return (strstr(st->as_string(), pattern) != NULL);
}
static void assert_test_pattern(Handle object, const char* pattern) {
stringStream st;
object->print_on(&st);
ASSERT_TRUE(test_pattern(&st, pattern)) << pattern << " not in " << st.as_string();
}
class LockerThread : public JavaTestThread {
oop _obj;
public:
LockerThread(Semaphore* post, oop obj) : JavaTestThread(post), _obj(obj) {}
virtual ~LockerThread() {}
void main_run() {
JavaThread* THREAD = JavaThread::current();
HandleMark hm(THREAD);
Handle h_obj(THREAD, _obj);
ResourceMark rm(THREAD);
// Wait gets the lock inflated.
// The object will stay locked for the context of 'ol' so the lock will
// still be inflated after the notify_all() call. Deflation can't happen
// while an ObjectMonitor is "busy" and being locked is the most "busy"
// state we have...
ObjectLocker ol(h_obj, THREAD);
ol.notify_all(THREAD);
assert_test_pattern(h_obj, "monitor");
}
};
TEST_VM(markWord, printing) {
JavaThread* THREAD = JavaThread::current();
ThreadInVMfromNative invm(THREAD);
ResourceMark rm(THREAD);
oop obj = vmClasses::Byte_klass()->allocate_instance(THREAD);
FlagSetting fs(WizardMode, true);
HandleMark hm(THREAD);
Handle h_obj(THREAD, obj);
// Thread tries to lock it.
{
ObjectLocker ol(h_obj, THREAD);
assert_test_pattern(h_obj, "locked");
}
assert_test_pattern(h_obj, "is_neutral no_hash");
// Hash the object then print it.
intx hash = h_obj->identity_hash();
assert_test_pattern(h_obj, "is_neutral hash=0x");
// Wait gets the lock inflated.
{
ObjectLocker ol(h_obj, THREAD);
Semaphore done(0);
LockerThread* st;
st = new LockerThread(&done, h_obj());
st->doit();
ol.wait(THREAD);
assert_test_pattern(h_obj, "monitor");
done.wait_with_safepoint_check(THREAD); // wait till the thread is done.
}
}
#endif // PRODUCT
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