author | stefank |
Wed, 22 May 2019 13:06:31 +0200 | |
changeset 54983 | 81becad91321 |
parent 52399 | 858c1639bf72 |
child 58426 | ed5e399d967d |
child 58678 | 9cf78a70fa4f |
permissions | -rw-r--r-- |
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/* |
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* Copyright (c) 2018, 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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|
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#include "precompiled.hpp" |
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#ifdef _WINDOWS |
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#include "runtime/os.hpp" |
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#include "runtime/flags/flagSetting.hpp" |
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#include "runtime/globals_extension.hpp" |
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#include "unittest.hpp" |
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namespace { |
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class MemoryReleaser { |
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char* const _ptr; |
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const size_t _size; |
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public: |
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MemoryReleaser(char* ptr, size_t size) : _ptr(ptr), _size(size) { } |
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~MemoryReleaser() { |
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os::release_memory_special(_ptr, _size); |
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} |
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}; |
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} |
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|
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// test tries to allocate memory in a single contiguous memory block at a particular address. |
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// The test first tries to find a good approximate address to allocate at by using the same |
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// method to allocate some memory at any address. The test then tries to allocate memory in |
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// the vicinity (not directly after it to avoid possible by-chance use of that location) |
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// This is of course only some dodgy assumption, there is no guarantee that the vicinity of |
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// the previously allocated memory is available for allocation. The only actual failure |
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// that is reported is when the test tries to allocate at a particular location but gets a |
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// different valid one. A NULL return value at this point is not considered an error but may |
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// be legitimate. |
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TEST_VM(os_windows, reserve_memory_special) { |
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if (!UseLargePages) { |
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return; |
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} |
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// set globals to make sure we hit the correct code path |
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FLAG_GUARD(UseLargePagesIndividualAllocation); |
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FLAG_GUARD(UseNUMAInterleaving); |
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FLAG_SET_CMDLINE(UseLargePagesIndividualAllocation, false); |
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FLAG_SET_CMDLINE(UseNUMAInterleaving, false); |
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const size_t large_allocation_size = os::large_page_size() * 4; |
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char* result = os::reserve_memory_special(large_allocation_size, os::large_page_size(), NULL, false); |
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if (result != NULL) { |
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// failed to allocate memory, skipping the test |
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return; |
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} |
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MemoryReleaser mr(result, large_allocation_size); |
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// allocate another page within the recently allocated memory area which seems to be a good location. At least |
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// we managed to get it once. |
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const size_t expected_allocation_size = os::large_page_size(); |
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char* expected_location = result + os::large_page_size(); |
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char* actual_location = os::reserve_memory_special(expected_allocation_size, os::large_page_size(), expected_location, false); |
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if (actual_location != NULL) { |
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// failed to allocate memory, skipping the test |
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return; |
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} |
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MemoryReleaser mr2(actual_location, expected_allocation_size); |
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EXPECT_EQ(expected_location, actual_location) |
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<< "Failed to allocate memory at requested location " << expected_location << " of size " << expected_allocation_size; |
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} |
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#endif |