author | ysuenaga |
Thu, 14 Jun 2018 16:56:58 +0900 | |
changeset 50560 | dafb2cc6ba32 |
parent 50535 | e1b3def12624 |
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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#include "precompiled.hpp" |
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// Included early because the NMT flags don't include it. |
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#include "utilities/macros.hpp" |
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#if INCLUDE_NMT |
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#include "runtime/thread.hpp" |
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#include "services/memTracker.hpp" |
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#include "services/virtualMemoryTracker.hpp" |
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#include "utilities/globalDefinitions.hpp" |
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#include "unittest.hpp" |
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class CommittedVirtualMemoryTest { |
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public: |
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static void test() { |
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#ifndef _AIX |
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// See JDK-8202772: temporarily disabled. |
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Thread* thr = Thread::current(); |
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address stack_end = thr->stack_end(); |
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size_t stack_size = thr->stack_size(); |
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MemTracker::record_thread_stack(stack_end, stack_size); |
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VirtualMemoryTracker::add_reserved_region(stack_end, stack_size, CALLER_PC, mtThreadStack); |
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// snapshot current stack usage |
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VirtualMemoryTracker::snapshot_thread_stacks(); |
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ReservedMemoryRegion* rmr = VirtualMemoryTracker::_reserved_regions->find(ReservedMemoryRegion(stack_end, stack_size)); |
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ASSERT_TRUE(rmr != NULL); |
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ASSERT_EQ(rmr->base(), stack_end); |
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ASSERT_EQ(rmr->size(), stack_size); |
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CommittedRegionIterator iter = rmr->iterate_committed_regions(); |
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int i = 0; |
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address i_addr = (address)&i; |
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bool found_i_addr = false; |
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// stack grows downward |
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address stack_top = stack_end + stack_size; |
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bool found_stack_top = false; |
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for (const CommittedMemoryRegion* region = iter.next(); region != NULL; region = iter.next()) { |
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if (region->base() + region->size() == stack_top) { |
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ASSERT_TRUE(region->size() <= stack_size); |
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found_stack_top = true; |
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} |
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if(i_addr < stack_top && i_addr >= region->base()) { |
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found_i_addr = true; |
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} |
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i++; |
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} |
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// stack and guard pages may be contiguous as one region |
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ASSERT_TRUE(i >= 1); |
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ASSERT_TRUE(found_stack_top); |
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ASSERT_TRUE(found_i_addr); |
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#endif // !_AIX |
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} |
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static void check_covered_pages(address addr, size_t size, address base, size_t touch_pages, int* page_num) { |
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const size_t page_sz = os::vm_page_size(); |
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size_t index; |
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for (index = 0; index < touch_pages; index ++) { |
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address page_addr = base + page_num[index] * page_sz; |
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// The range covers this page, marks the page |
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if (page_addr >= addr && page_addr < addr + size) { |
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page_num[index] = -1; |
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} |
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} |
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} |
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static void test_committed_region_impl(size_t num_pages, size_t touch_pages, int* page_num) { |
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const size_t page_sz = os::vm_page_size(); |
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const size_t size = num_pages * page_sz; |
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char* base = os::reserve_memory(size, NULL, page_sz, mtThreadStack); |
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bool result = os::commit_memory(base, size, false); |
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size_t index; |
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ASSERT_NE(base, (char*)NULL); |
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for (index = 0; index < touch_pages; index ++) { |
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char* touch_addr = base + page_sz * page_num[index]; |
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*touch_addr = 'a'; |
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} |
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address frame = (address)0x1235; |
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NativeCallStack stack(&frame, 1); |
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VirtualMemoryTracker::add_reserved_region((address)base, size, stack, mtThreadStack); |
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// trigger the test |
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VirtualMemoryTracker::snapshot_thread_stacks(); |
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ReservedMemoryRegion* rmr = VirtualMemoryTracker::_reserved_regions->find(ReservedMemoryRegion((address)base, size)); |
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ASSERT_TRUE(rmr != NULL); |
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bool precise_tracking_supported = false; |
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CommittedRegionIterator iter = rmr->iterate_committed_regions(); |
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for (const CommittedMemoryRegion* region = iter.next(); region != NULL; region = iter.next()) { |
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if (region->size() == size) { |
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// platforms that do not support precise tracking. |
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ASSERT_TRUE(iter.next() == NULL); |
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break; |
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} else { |
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precise_tracking_supported = true; |
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check_covered_pages(region->base(), region->size(), (address)base, touch_pages, page_num); |
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} |
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} |
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if (precise_tracking_supported) { |
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// All touched pages should be committed |
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for (size_t index = 0; index < touch_pages; index ++) { |
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ASSERT_EQ(page_num[index], -1); |
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} |
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} |
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// Cleanup |
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os::free_memory(base, size, page_sz); |
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VirtualMemoryTracker::remove_released_region((address)base, size); |
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rmr = VirtualMemoryTracker::_reserved_regions->find(ReservedMemoryRegion((address)base, size)); |
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ASSERT_TRUE(rmr == NULL); |
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} |
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static void test_committed_region() { |
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// On Linux, we scan 1024 pages at a time. |
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// Here, we test scenario that scans < 1024 pages. |
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int small_range[] = {3, 9, 46}; |
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int mid_range[] = {0, 45, 100, 399, 400, 1000, 1031}; |
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int large_range[] = {100, 301, 1024, 2047, 2048, 2049, 2050, 3000}; |
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test_committed_region_impl(47, 3, small_range); |
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test_committed_region_impl(1088, 5, mid_range); |
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test_committed_region_impl(3074, 8, large_range); |
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} |
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static void test_partial_region() { |
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bool result; |
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size_t committed_size; |
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address committed_start; |
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size_t index; |
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const size_t page_sz = os::vm_page_size(); |
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const size_t num_pages = 4; |
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const size_t size = num_pages * page_sz; |
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char* base = os::reserve_memory(size, NULL, page_sz, mtTest); |
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ASSERT_NE(base, (char*)NULL); |
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result = os::commit_memory(base, size, false); |
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ASSERT_TRUE(result); |
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// touch all pages |
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for (index = 0; index < num_pages; index ++) { |
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*(base + index * page_sz) = 'a'; |
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} |
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// Test whole range |
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result = os::committed_in_range((address)base, size, committed_start, committed_size); |
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ASSERT_TRUE(result); |
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ASSERT_EQ(num_pages * page_sz, committed_size); |
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ASSERT_EQ(committed_start, (address)base); |
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// Test beginning of the range |
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result = os::committed_in_range((address)base, 2 * page_sz, committed_start, committed_size); |
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ASSERT_TRUE(result); |
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ASSERT_EQ(2 * page_sz, committed_size); |
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ASSERT_EQ(committed_start, (address)base); |
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// Test end of the range |
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result = os::committed_in_range((address)(base + page_sz), 3 * page_sz, committed_start, committed_size); |
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ASSERT_TRUE(result); |
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ASSERT_EQ(3 * page_sz, committed_size); |
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ASSERT_EQ(committed_start, (address)(base + page_sz)); |
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// Test middle of the range |
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result = os::committed_in_range((address)(base + page_sz), 2 * page_sz, committed_start, committed_size); |
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ASSERT_TRUE(result); |
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ASSERT_EQ(2 * page_sz, committed_size); |
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ASSERT_EQ(committed_start, (address)(base + page_sz)); |
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} |
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}; |
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TEST_VM(CommittedVirtualMemoryTracker, test_committed_virtualmemory_region) { |
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VirtualMemoryTracker::initialize(NMT_detail); |
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VirtualMemoryTracker::late_initialize(NMT_detail); |
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CommittedVirtualMemoryTest::test(); |
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CommittedVirtualMemoryTest::test_committed_region(); |
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CommittedVirtualMemoryTest::test_partial_region(); |
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} |
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changeset
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#endif // INCLUDE_NMT |