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8191369: NMT: Enhance thread stack tracking

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More precise thread stack tracking on Linux and Windows

Reviewed-by: coleenp, adinn, minqi
This commit is contained in:
Zhengyu Gu 2018-03-01 16:35:36 -05:00
parent d7765d9002
commit 354249f51e
8 changed files with 209 additions and 28 deletions
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86
test/hotspot/gtest/runtime/test_threadstack_tracking.cpp Normal file
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/*
* Copyright (c) 2018, Oracle and/or its affiliates. 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.
*/
#include "precompiled.hpp"
// Included early because the NMT flags don't include it.
#include "utilities/macros.hpp"
#include "runtime/thread.hpp"
#include "services/memTracker.hpp"
#include "services/virtualMemoryTracker.hpp"
#include "utilities/globalDefinitions.hpp"
#include "unittest.hpp"
class ThreadStackTrackingTest {
public:
static void test() {
VirtualMemoryTracker::initialize(NMT_detail);
VirtualMemoryTracker::late_initialize(NMT_detail);
Thread* thr = Thread::current();
address stack_end = thr->stack_end();
size_t stack_size = thr->stack_size();
MemTracker::record_thread_stack(stack_end, stack_size);
VirtualMemoryTracker::add_reserved_region(stack_end, stack_size, CALLER_PC, mtThreadStack);
// snapshot current stack usage
VirtualMemoryTracker::snapshot_thread_stacks();
ReservedMemoryRegion* rmr = VirtualMemoryTracker::_reserved_regions->find(ReservedMemoryRegion(stack_end, stack_size));
ASSERT_TRUE(rmr != NULL);
ASSERT_EQ(rmr->base(), stack_end);
ASSERT_EQ(rmr->size(), stack_size);
CommittedRegionIterator iter = rmr->iterate_committed_regions();
int i = 0;
address i_addr = (address)&i;
// stack grows downward
address stack_top = stack_end + stack_size;
bool found_stack_top = false;
for (const CommittedMemoryRegion* region = iter.next(); region != NULL; region = iter.next()) {
if (region->base() + region->size() == stack_top) {
// This should be active part, "i" should be here
ASSERT_TRUE(i_addr < stack_top && i_addr >= region->base());
ASSERT_TRUE(region->size() <= stack_size);
found_stack_top = true;
}
i++;
}
// NMT was not turned on when the thread was created, so we don't have guard pages
ASSERT_TRUE(i == 1);
ASSERT_TRUE(found_stack_top);
}
};
TEST_VM(VirtualMemoryTracker, thread_stack_tracking) {
ThreadStackTrackingTest::test();
}