1 /* |
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2 * Copyright (c) 2018, Oracle and/or its affiliates. All rights reserved. |
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3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
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4 * |
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5 * This code is free software; you can redistribute it and/or modify it |
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6 * under the terms of the GNU General Public License version 2 only, as |
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7 * published by the Free Software Foundation. |
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8 * |
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9 * This code is distributed in the hope that it will be useful, but WITHOUT |
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10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
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11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
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12 * version 2 for more details (a copy is included in the LICENSE file that |
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13 * accompanied this code). |
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14 * |
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15 * You should have received a copy of the GNU General Public License version |
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16 * 2 along with this work; if not, write to the Free Software Foundation, |
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17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
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18 * |
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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20 * or visit www.oracle.com if you need additional information or have any |
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21 * questions. |
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22 */ |
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23 |
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24 #include "precompiled.hpp" |
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25 |
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26 // Included early because the NMT flags don't include it. |
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27 #include "utilities/macros.hpp" |
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28 |
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29 #include "runtime/thread.hpp" |
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30 #include "services/memTracker.hpp" |
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31 #include "services/virtualMemoryTracker.hpp" |
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32 #include "utilities/globalDefinitions.hpp" |
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33 #include "unittest.hpp" |
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34 |
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35 |
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36 class ThreadStackTrackingTest { |
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37 public: |
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38 static void test() { |
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39 VirtualMemoryTracker::initialize(NMT_detail); |
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40 VirtualMemoryTracker::late_initialize(NMT_detail); |
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41 |
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42 Thread* thr = Thread::current(); |
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43 address stack_end = thr->stack_end(); |
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44 size_t stack_size = thr->stack_size(); |
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45 |
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46 MemTracker::record_thread_stack(stack_end, stack_size); |
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47 |
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48 VirtualMemoryTracker::add_reserved_region(stack_end, stack_size, CALLER_PC, mtThreadStack); |
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49 |
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50 // snapshot current stack usage |
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51 VirtualMemoryTracker::snapshot_thread_stacks(); |
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52 |
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53 ReservedMemoryRegion* rmr = VirtualMemoryTracker::_reserved_regions->find(ReservedMemoryRegion(stack_end, stack_size)); |
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54 ASSERT_TRUE(rmr != NULL); |
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55 |
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56 ASSERT_EQ(rmr->base(), stack_end); |
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57 ASSERT_EQ(rmr->size(), stack_size); |
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58 |
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59 CommittedRegionIterator iter = rmr->iterate_committed_regions(); |
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60 int i = 0; |
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61 address i_addr = (address)&i; |
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62 |
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63 // stack grows downward |
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64 address stack_top = stack_end + stack_size; |
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65 bool found_stack_top = false; |
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66 |
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67 for (const CommittedMemoryRegion* region = iter.next(); region != NULL; region = iter.next()) { |
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68 if (region->base() + region->size() == stack_top) { |
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69 // This should be active part, "i" should be here |
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70 ASSERT_TRUE(i_addr < stack_top && i_addr >= region->base()); |
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71 ASSERT_TRUE(region->size() <= stack_size); |
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72 found_stack_top = true; |
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73 } |
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74 |
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75 i++; |
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76 } |
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77 |
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78 // NMT was not turned on when the thread was created, so we don't have guard pages |
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79 ASSERT_TRUE(i == 1); |
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80 ASSERT_TRUE(found_stack_top); |
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81 } |
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82 }; |
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83 |
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84 TEST_VM(VirtualMemoryTracker, thread_stack_tracking) { |
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85 ThreadStackTrackingTest::test(); |
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86 } |
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