author | herrick |
Wed, 28 Aug 2019 11:58:56 -0400 | |
branch | JDK-8200758-branch |
changeset 57912 | 2faaa38c86a4 |
parent 57809 | 8c118637a684 |
parent 57893 | 49fea19f0726 |
permissions | -rw-r--r-- |
54765 | 1 |
/* |
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* Copyright (c) 2019, Oracle and/or its affiliates. All rights reserved. |
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
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* |
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* This code is free software; you can redistribute it and/or modify it |
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* under the terms of the GNU General Public License version 2 only, as |
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* published by the Free Software Foundation. |
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* |
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* This code is distributed in the hope that it will be useful, but WITHOUT |
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
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* version 2 for more details (a copy is included in the LICENSE file that |
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* accompanied this code). |
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* |
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* You should have received a copy of the GNU General Public License version |
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* 2 along with this work; if not, write to the Free Software Foundation, |
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
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* |
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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* or visit www.oracle.com if you need additional information or have any |
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* questions. |
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*/ |
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#include "precompiled.hpp" |
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#include "classfile/systemDictionary.hpp" |
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#include "memory/resourceArea.hpp" |
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#include "memory/universe.hpp" |
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#include "oops/oop.inline.hpp" |
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#include "runtime/atomic.hpp" |
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#include "runtime/interfaceSupport.inline.hpp" |
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#include "runtime/orderAccess.hpp" |
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#include "runtime/os.hpp" |
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#include "runtime/synchronizer.hpp" |
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#include "runtime/semaphore.inline.hpp" |
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#include "threadHelper.inline.hpp" |
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#include "unittest.hpp" |
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#include "utilities/globalDefinitions.hpp" |
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#include "utilities/ostream.hpp" |
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// The test doesn't work for PRODUCT because it needs WizardMode |
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#ifndef PRODUCT |
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static bool test_pattern(stringStream* st, const char* pattern) { |
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return (strstr(st->as_string(), pattern) != NULL); |
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} |
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static void assert_test_pattern(Handle object, const char* pattern) { |
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stringStream st; |
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object->print_on(&st); |
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ASSERT_TRUE(test_pattern(&st, pattern)) << pattern << " not in " << st.as_string(); |
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} |
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static void assert_not_test_pattern(Handle object, const char* pattern) { |
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stringStream st; |
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object->print_on(&st); |
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ASSERT_FALSE(test_pattern(&st, pattern)) << pattern << " found in " << st.as_string(); |
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} |
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class LockerThread : public JavaTestThread { |
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oop _obj; |
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public: |
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LockerThread(Semaphore* post, oop obj) : JavaTestThread(post), _obj(obj) {} |
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virtual ~LockerThread() {} |
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void main_run() { |
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Thread* THREAD = Thread::current(); |
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HandleMark hm(THREAD); |
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Handle h_obj(THREAD, _obj); |
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ResourceMark rm(THREAD); |
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// Wait gets the lock inflated. |
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// The object will stay locked for the context of 'ol' so the lock will |
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// still be inflated after the notify_all() call. Deflation can't happen |
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// while an ObjectMonitor is "busy" and being locked is the most "busy" |
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// state we have... |
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ObjectLocker ol(h_obj, THREAD); |
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ol.notify_all(THREAD); |
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assert_test_pattern(h_obj, "monitor"); |
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} |
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}; |
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57777
90ead0febf56
8229258: Rework markOop and markOopDesc into a simpler mark word value carrier
stefank
parents:
54771
diff
changeset
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TEST_VM(markWord, printing) { |
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JavaThread* THREAD = JavaThread::current(); |
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ThreadInVMfromNative invm(THREAD); |
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ResourceMark rm(THREAD); |
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oop obj = SystemDictionary::Byte_klass()->allocate_instance(THREAD); |
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FlagSetting fs(WizardMode, true); |
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FlagSetting bf(UseBiasedLocking, true); |
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HandleMark hm(THREAD); |
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Handle h_obj(THREAD, obj); |
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// Biased locking is initially enabled for this java.lang.Byte object. |
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assert_test_pattern(h_obj, "is_biased"); |
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// Lock using biased locking. |
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BasicObjectLock lock; |
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lock.set_obj(obj); |
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57893
49fea19f0726
8229844: Remove attempt_rebias parameter from revoke_and_rebias()
pchilanomate
parents:
57777
diff
changeset
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markWord prototype_header = obj->klass()->prototype_header(); |
49fea19f0726
8229844: Remove attempt_rebias parameter from revoke_and_rebias()
pchilanomate
parents:
57777
diff
changeset
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markWord mark = obj->mark(); |
49fea19f0726
8229844: Remove attempt_rebias parameter from revoke_and_rebias()
pchilanomate
parents:
57777
diff
changeset
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markWord biased_mark = markWord::encode((JavaThread*) THREAD, mark.age(), prototype_header.bias_epoch()); |
49fea19f0726
8229844: Remove attempt_rebias parameter from revoke_and_rebias()
pchilanomate
parents:
57777
diff
changeset
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obj->set_mark(biased_mark); |
57777
90ead0febf56
8229258: Rework markOop and markOopDesc into a simpler mark word value carrier
stefank
parents:
54771
diff
changeset
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// Look for the biased_locker in markWord, not prototype_header. |
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#ifdef _LP64 |
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assert_not_test_pattern(h_obj, "mark(is_biased biased_locker=0x0000000000000000"); |
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54771
d266d24b6a0e
8223589: Build failures after JDK-8223534 (add back fixed test_markOop.cpp)
shade
parents:
54765
diff
changeset
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#else |
d266d24b6a0e
8223589: Build failures after JDK-8223534 (add back fixed test_markOop.cpp)
shade
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assert_not_test_pattern(h_obj, "mark(is_biased biased_locker=0x00000000"); |
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#endif |
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// Same thread tries to lock it again. |
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{ |
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ObjectLocker ol(h_obj, THREAD); |
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assert_test_pattern(h_obj, "locked"); |
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} |
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// This is no longer biased, because ObjectLocker revokes the bias. |
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assert_test_pattern(h_obj, "is_neutral no_hash"); |
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// Wait gets the lock inflated. |
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{ |
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ObjectLocker ol(h_obj, THREAD); |
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Semaphore done(0); |
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LockerThread* st; |
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st = new LockerThread(&done, h_obj()); |
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st->doit(); |
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ol.wait(THREAD); |
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assert_test_pattern(h_obj, "monitor"); |
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done.wait_with_safepoint_check(THREAD); // wait till the thread is done. |
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} |
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// Make the object older. Not all GCs use this field. |
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Universe::heap()->collect(GCCause::_java_lang_system_gc); |
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if (UseParallelGC) { |
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assert_test_pattern(h_obj, "is_neutral no_hash age 1"); |
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} |
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// Hash the object then print it. |
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intx hash = h_obj->identity_hash(); |
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assert_test_pattern(h_obj, "is_neutral hash=0x"); |
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} |
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#endif // PRODUCT |