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8316746: Top of lock-stack does not match the unlocked object
Reviewed-by: rrich Backport-of: 7d8adfa855e51a90c2f125fc20a06f9a488e6248
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/* | ||
* Copyright (c) 2023 SAP SE. 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. | ||
* | ||
*/ | ||
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/* | ||
* @test | ||
* @bug 8316746 | ||
* @summary During OSR, locks get transferred from interpreter frame. | ||
* Check that unlocking 2 such locks works in the OSR compiled nmethod. | ||
* Some platforms verify that the unlocking happens in the corrent order. | ||
* | ||
* @run main/othervm -Xbatch TestUnlockOSR | ||
*/ | ||
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public class TestUnlockOSR { | ||
static void test_method(Object a, Object b, int limit) { | ||
synchronized(a) { // allocate space for monitors | ||
synchronized(b) { | ||
} | ||
} // free space to test allocation in reused space | ||
synchronized(a) { // reuse the space | ||
synchronized(b) { | ||
for (int i = 0; i < limit; i++) {} | ||
} | ||
} | ||
} | ||
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public static void main(String[] args) { | ||
Object a = new TestUnlockOSR(), | ||
b = new TestUnlockOSR(); | ||
// avoid uncommon trap before last unlocks | ||
for (int i = 0; i < 100; i++) { test_method(a, b, 0); } | ||
// trigger OSR | ||
test_method(a, b, 100000); | ||
} | ||
} |