src/hotspot/share/gc/shenandoah/shenandoahVerifier.hpp
author coleenp
Thu, 10 Jan 2019 15:13:51 -0500
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child 54463 b9c461c02f7c
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8216167: Update include guards to reflect correct directories Summary: Use script and some manual fixup to fix directores names in include guards. Reviewed-by: lfoltan, eosterlund, kbarrett
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/*
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 * Copyright (c) 2017, 2018, Red Hat, Inc. All rights reserved.
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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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#ifndef SHARE_GC_SHENANDOAH_SHENANDOAHVERIFIER_HPP
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#define SHARE_GC_SHENANDOAH_SHENANDOAHVERIFIER_HPP
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#include "gc/shared/markBitMap.hpp"
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#include "memory/allocation.hpp"
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#include "oops/oopsHierarchy.hpp"
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#include "utilities/stack.hpp"
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class ShenandoahHeap;
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#ifdef _WINDOWS
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#pragma warning( disable : 4522 )
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#endif
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class ShenandoahVerifierTask {
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public:
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  ShenandoahVerifierTask(oop o = NULL, int idx = 0): _obj(o) { }
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  ShenandoahVerifierTask(oop o, size_t idx): _obj(o) { }
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  ShenandoahVerifierTask(const ShenandoahVerifierTask& t): _obj(t._obj) { }
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  ShenandoahVerifierTask& operator =(const ShenandoahVerifierTask& t) {
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    _obj = t._obj;
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    return *this;
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  }
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  volatile ShenandoahVerifierTask&
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  operator =(const volatile ShenandoahVerifierTask& t) volatile {
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    (void)const_cast<oop&>(_obj = t._obj);
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    return *this;
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  }
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  inline oop obj()  const { return _obj; }
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private:
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  oop _obj;
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};
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typedef Stack<ShenandoahVerifierTask, mtGC> ShenandoahVerifierStack;
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typedef volatile juint ShenandoahLivenessData;
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class ShenandoahVerifier : public CHeapObj<mtGC> {
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private:
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  ShenandoahHeap* _heap;
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  MarkBitMap* _verification_bit_map;
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public:
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  typedef enum {
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    // Disable marked objects verification.
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    _verify_marked_disable,
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    // Objects should be marked in "next" bitmap.
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    _verify_marked_incomplete,
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    // Objects should be marked in "complete" bitmap.
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    _verify_marked_complete,
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  } VerifyMarked;
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  typedef enum {
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    // Disable forwarded objects verification.
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    _verify_forwarded_disable,
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    // Objects should not have forwardees.
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    _verify_forwarded_none,
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    // Objects may have forwardees.
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    _verify_forwarded_allow,
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  } VerifyForwarded;
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  typedef enum {
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    // Disable collection set verification.
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    _verify_cset_disable,
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    // Should have no references to cset.
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    _verify_cset_none,
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    // May have references to cset, all should be forwarded.
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    // Note: Allowing non-forwarded references to cset is equivalent
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    // to _verify_cset_disable.
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    _verify_cset_forwarded,
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  } VerifyCollectionSet;
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  typedef enum {
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    // Disable liveness verification
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    _verify_liveness_disable,
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    // All objects should belong to live regions
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    _verify_liveness_conservative,
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    // All objects should belong to live regions,
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    // and liveness data should be accurate
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    _verify_liveness_complete,
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  } VerifyLiveness;
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  typedef enum {
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    // Disable region verification
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    _verify_regions_disable,
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    // No trash regions allowed
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    _verify_regions_notrash,
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    // No collection set regions allowed
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    _verify_regions_nocset,
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    // No trash and no cset regions allowed
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    _verify_regions_notrash_nocset,
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  } VerifyRegions;
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  typedef enum {
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    // Disable gc-state verification
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    _verify_gcstate_disable,
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    // Nothing is in progress, no forwarded objects
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    _verify_gcstate_stable,
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    // Nothing is in progress, some objects are forwarded
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    _verify_gcstate_forwarded,
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  } VerifyGCState;
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  struct VerifyOptions {
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    VerifyForwarded     _verify_forwarded;
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    VerifyMarked        _verify_marked;
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    VerifyCollectionSet _verify_cset;
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    VerifyLiveness      _verify_liveness;
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    VerifyRegions       _verify_regions;
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    VerifyGCState       _verify_gcstate;
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    VerifyOptions(VerifyForwarded verify_forwarded,
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                  VerifyMarked verify_marked,
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                  VerifyCollectionSet verify_collection_set,
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                  VerifyLiveness verify_liveness,
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                  VerifyRegions verify_regions,
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                  VerifyGCState verify_gcstate) :
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            _verify_forwarded(verify_forwarded), _verify_marked(verify_marked),
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            _verify_cset(verify_collection_set),
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            _verify_liveness(verify_liveness), _verify_regions(verify_regions),
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            _verify_gcstate(verify_gcstate) {}
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  };
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private:
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  void verify_at_safepoint(const char *label,
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                           VerifyForwarded forwarded,
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                           VerifyMarked marked,
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                           VerifyCollectionSet cset,
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                           VerifyLiveness liveness,
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                           VerifyRegions regions,
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                           VerifyGCState gcstate);
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public:
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  ShenandoahVerifier(ShenandoahHeap* heap, MarkBitMap* verification_bitmap) :
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          _heap(heap), _verification_bit_map(verification_bitmap) {};
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  void verify_before_concmark();
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  void verify_after_concmark();
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  void verify_before_evacuation();
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  void verify_after_evacuation();
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  void verify_before_updaterefs();
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  void verify_after_updaterefs();
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  void verify_before_fullgc();
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  void verify_after_fullgc();
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  void verify_before_traversal();
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  void verify_after_traversal();
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  void verify_after_degenerated();
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  void verify_generic(VerifyOption option);
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};
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#endif // SHARE_GC_SHENANDOAH_SHENANDOAHVERIFIER_HPP