44ec501a41
Co-authored-by: Sandhya Viswanathan <sviswanathan@openjdk.org> Co-authored-by: Martin Doerr <mdoerr@openjdk.org> Co-authored-by: Hamlin Li <mli@openjdk.org> Co-authored-by: Thomas Stuefe <stuefe@openjdk.org> Co-authored-by: Amit Kumar <amitkumar@openjdk.org> Co-authored-by: Stefan Karlsson <stefank@openjdk.org> Co-authored-by: Coleen Phillimore <coleenp@openjdk.org> Co-authored-by: Axel Boldt-Christmas <aboldtch@openjdk.org> Reviewed-by: coleenp, stefank, stuefe, phh, ihse, lmesnik, tschatzl, matsaave, rcastanedalo, vpaprotski, yzheng, egahlin
78 lines
3.0 KiB
C++
78 lines
3.0 KiB
C++
/*
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* Copyright (c) 2017, 2024, 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 "gc/shared/preservedMarks.inline.hpp"
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#include "gc/shared/fullGCForwarding.inline.hpp"
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#include "oops/oop.inline.hpp"
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#include "unittest.hpp"
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static markWord originalMark() { return markWord(markWord::lock_mask_in_place); }
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static markWord changedMark() { return markWord(0x4711); }
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#define ASSERT_MARK_WORD_EQ(a, b) ASSERT_EQ((a).value(), (b).value())
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TEST_VM(PreservedMarks, iterate_and_restore) {
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PreservedMarks pm;
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HeapWord fakeheap[32] = { nullptr };
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HeapWord* heap = align_up(fakeheap, 8 * sizeof(HeapWord));
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FullGCForwarding::initialize(MemRegion(&heap[0], &heap[16]));
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oop o1 = cast_to_oop(&heap[0]); o1->set_mark(originalMark());
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oop o2 = cast_to_oop(&heap[2]); o2->set_mark(originalMark());
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oop o3 = cast_to_oop(&heap[4]); o3->set_mark(originalMark());
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oop o4 = cast_to_oop(&heap[6]); o4->set_mark(originalMark());
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// Make sure initial marks are correct.
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ASSERT_MARK_WORD_EQ(o1->mark(), originalMark());
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ASSERT_MARK_WORD_EQ(o2->mark(), originalMark());
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ASSERT_MARK_WORD_EQ(o3->mark(), originalMark());
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ASSERT_MARK_WORD_EQ(o4->mark(), originalMark());
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// Change the marks and verify change.
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o1->set_mark(changedMark());
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o2->set_mark(changedMark());
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ASSERT_MARK_WORD_EQ(o1->mark(), changedMark());
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ASSERT_MARK_WORD_EQ(o2->mark(), changedMark());
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// Push o1 and o2 to have their marks preserved.
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pm.push_if_necessary(o1, o1->mark());
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pm.push_if_necessary(o2, o2->mark());
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// Fake a move from o1->o3 and o2->o4.
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FullGCForwarding::forward_to(o1, o3);
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FullGCForwarding::forward_to(o2, o4);
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ASSERT_EQ(FullGCForwarding::forwardee(o1), o3);
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ASSERT_EQ(FullGCForwarding::forwardee(o2), o4);
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// Adjust will update the PreservedMarks stack to
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// make sure the mark is updated at the new location.
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pm.adjust_during_full_gc();
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// Restore all preserved and verify that the changed
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// mark is now present at o3 and o4.
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pm.restore();
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ASSERT_MARK_WORD_EQ(o3->mark(), changedMark());
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ASSERT_MARK_WORD_EQ(o4->mark(), changedMark());
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}
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