70 lines
2.8 KiB
C++
70 lines
2.8 KiB
C++
/*
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* Copyright (c) 2020, Oracle and/or its affiliates. All rights reserved.
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* Copyright (c) 2020 SAP SE. 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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*/
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#include "precompiled.hpp"
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#include "memory/metaspace/metaspaceArena.hpp"
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#include "memory/metaspace/metaspaceSettings.hpp"
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#include "memory/metaspace/testHelpers.hpp"
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#include "utilities/debug.hpp"
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#include "utilities/ostream.hpp"
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//#define LOG_PLEASE
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#include "metaspaceGtestCommon.hpp"
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#include "metaspaceGtestContexts.hpp"
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#ifdef ASSERT
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using metaspace::MetaspaceArena;
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using metaspace::MetaspaceTestArena;
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using metaspace::Settings;
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// Test that overwriting memory triggers an assert if allocation guards are enabled.
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// Note: We use TEST_VM_ASSERT_MSG. However, an assert is only triggered if allocation
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// guards are enabled; if guards are disabled for the gtests, this test would fail.
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// So for that case, we trigger a fake assert.
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TEST_VM_ASSERT_MSG(metaspace, test_overwriter, ".*Metaspace corruption.*") {
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if (Settings::use_allocation_guard()) {
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MetaspaceGtestContext context;
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MetaspaceTestArena* arena = context.create_arena(Metaspace::StandardMetaspaceType);
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// We allocate two blocks. We then write over the end of the first block, which
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// should corrupt the fence between the two blocks.
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// Note: there is of course no guarantee that blocks allocated sequentially are neighbors;
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// but in this case (clean standard-sized test arena and very small allocations) it can
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// be safely assumed).
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MetaWord* p1 = arena->allocate(8);
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MetaWord* p2 = arena->allocate(2);
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p1[8] = (MetaWord)0x9345; // Overwriter
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// Now we delete the arena (as happens during class unloading); this will check all
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// block canaries and should trigger an assert (see MetaspaceArena::verify_allocation_guards()).
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delete arena;
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} else {
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assert(false, "Metaspace corruption - please ignore this, fake message to satisfy tests");
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}
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}
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#endif // ASSERT
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