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1 /* |
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2 * Copyright (c) 1997, 2017, 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 |
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25 #include "precompiled.hpp" |
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26 #include "runtime/safepointVerifiers.hpp" |
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27 #include "gc/shared/collectedHeap.hpp" |
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28 #include "memory/universe.hpp" |
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29 #include "utilities/debug.hpp" |
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30 |
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31 // Implementation of NoGCVerifier |
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32 |
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33 #ifdef ASSERT |
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34 |
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35 NoGCVerifier::NoGCVerifier(bool verifygc) { |
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36 _verifygc = verifygc; |
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37 if (_verifygc) { |
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38 CollectedHeap* h = Universe::heap(); |
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39 assert(!h->is_gc_active(), "GC active during NoGCVerifier"); |
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40 _old_invocations = h->total_collections(); |
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41 } |
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42 } |
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43 |
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44 |
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45 NoGCVerifier::~NoGCVerifier() { |
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46 if (_verifygc) { |
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47 CollectedHeap* h = Universe::heap(); |
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48 assert(!h->is_gc_active(), "GC active during NoGCVerifier"); |
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49 if (_old_invocations != h->total_collections()) { |
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50 fatal("collection in a NoGCVerifier secured function"); |
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51 } |
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52 } |
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53 } |
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54 |
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55 PauseNoGCVerifier::PauseNoGCVerifier(NoGCVerifier * ngcv) { |
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56 _ngcv = ngcv; |
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57 if (_ngcv->_verifygc) { |
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58 // if we were verifying, then make sure that nothing is |
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59 // wrong before we "pause" verification |
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60 CollectedHeap* h = Universe::heap(); |
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61 assert(!h->is_gc_active(), "GC active during NoGCVerifier"); |
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62 if (_ngcv->_old_invocations != h->total_collections()) { |
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63 fatal("collection in a NoGCVerifier secured function"); |
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64 } |
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65 } |
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66 } |
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67 |
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68 |
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69 PauseNoGCVerifier::~PauseNoGCVerifier() { |
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70 if (_ngcv->_verifygc) { |
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71 // if we were verifying before, then reenable verification |
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72 CollectedHeap* h = Universe::heap(); |
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73 assert(!h->is_gc_active(), "GC active during NoGCVerifier"); |
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74 _ngcv->_old_invocations = h->total_collections(); |
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75 } |
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76 } |
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77 |
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78 #endif |