jdk8-mips64-public/hotspot: src/share/vm/memory/referencePolicy.hpp@8ce625481709

7032407: Crash in LinkResolver::runtime_resolve_virtual_method()
Summary: Make CDS reorder vtables so that dump time vtables match run time order, so when redefine classes reinitializes them, they aren't in the wrong order.
Reviewed-by: dcubed, acorn

     1 /*

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     3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

     4  *

     5  * This code is free software; you can redistribute it and/or modify it

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    10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

    11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

    12  * version 2 for more details (a copy is included in the LICENSE file that

    13  * accompanied this code).

    14  *

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    18  *

    19  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

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    25 #ifndef SHARE_VM_MEMORY_REFERENCEPOLICY_HPP

    26 #define SHARE_VM_MEMORY_REFERENCEPOLICY_HPP

    28 // referencePolicy is used to determine when soft reference objects

    29 // should be cleared.

    32 class ReferencePolicy : public CHeapObj {

    33  public:

    34   virtual bool should_clear_reference(oop p)       { ShouldNotReachHere(); return true; }

    35   // Capture state (of-the-VM) information needed to evaluate the policy

    36   virtual void setup() { /* do nothing */ }

    37 };

    39 class NeverClearPolicy : public ReferencePolicy {

    40  public:

    41   bool should_clear_reference(oop p) { return false; }

    42 };

    44 class AlwaysClearPolicy : public ReferencePolicy {

    45  public:

    46   bool should_clear_reference(oop p) { return true; }

    47 };

    49 class LRUCurrentHeapPolicy : public ReferencePolicy {

    50  private:

    51   jlong _max_interval;

    53  public:

    54   LRUCurrentHeapPolicy();

    56   // Capture state (of-the-VM) information needed to evaluate the policy

    57   void setup();

    58   bool should_clear_reference(oop p);

    59 };

    61 class LRUMaxHeapPolicy : public ReferencePolicy {

    62  private:

    63   jlong _max_interval;

    65  public:

    66   LRUMaxHeapPolicy();

    68   // Capture state (of-the-VM) information needed to evaluate the policy

    69   void setup();

    70   bool should_clear_reference(oop p);

    71 };

    73 #endif // SHARE_VM_MEMORY_REFERENCEPOLICY_HPP

Mercurial > jdk8-mips64-public > hotspot / file revision

src/share/vm/memory/referencePolicy.hpp@8ce625481709

src/share/vm/memory/referencePolicy.hpp