jdk8-mips64-public/hotspot: src/share/vm/prims/privilegedStack.hpp@4c84d351cca9

8007074: SIGSEGV at ParMarkBitMap::verify_clear()
Summary: Replace the broken large pages implementation on Linux. New flag: -XX:+UseTransparentHugePages - Linux specific flag to turn on transparent huge page hinting with madvise(..., MAP_HUGETLB). Changed behavior: -XX:+UseLargePages - tries to use -XX:+UseTransparentHugePages before trying other large pages implementations (on Linux). Changed behavior: -XX:+UseHugeTLBFS - Use upfront allocation of Large Pages instead of using the broken implementation to dynamically committing large pages. Changed behavior: -XX:LargePageSizeInBytes - Turned off the ability to use this flag on Linux and provides warning to user if set to a value different than the OS chosen large page size. Changed behavior: Setting no large page size - Now defaults to use -XX:UseTransparentHugePages if the OS supports it. Previously, -XX:+UseHugeTLBFS was chosen if the OS was configured to use large pages.
Reviewed-by: tschatzl, dcubed, brutisso

     1 /*

     2  * Copyright (c) 1997, 2012, Oracle and/or its affiliates. All rights reserved.

     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

     6  * under the terms of the GNU General Public License version 2 only, as

     7  * published by the Free Software Foundation.

     8  *

     9  * This code is distributed in the hope that it will be useful, but WITHOUT

    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  *

    15  * You should have received a copy of the GNU General Public License version

    16  * 2 along with this work; if not, write to the Free Software Foundation,

    17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

    18  *

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

    20  * or visit www.oracle.com if you need additional information or have any

    21  * questions.

    22  *

    23  */

    25 #ifndef SHARE_VM_PRIMS_PRIVILEGEDSTACK_HPP

    26 #define SHARE_VM_PRIMS_PRIVILEGEDSTACK_HPP

    28 #include "memory/allocation.hpp"

    29 #include "oops/oopsHierarchy.hpp"

    30 #include "runtime/vframe.hpp"

    31 #include "utilities/growableArray.hpp"

    33 class PrivilegedElement VALUE_OBJ_CLASS_SPEC {

    34  private:

    35   Klass*    _klass;                // klass for method

    36   oop       _privileged_context;   // context for operation

    37   intptr_t*     _frame_id;             // location on stack

    38   PrivilegedElement* _next;        // Link to next one on stack

    39  public:

    40   void initialize(vframeStream* vf, oop context, PrivilegedElement* next, TRAPS);

    41   void oops_do(OopClosure* f);

    42   void classes_do(KlassClosure* f);

    43   intptr_t* frame_id() const           { return _frame_id; }

    44   oop  privileged_context() const  { return _privileged_context; }

    45   oop  class_loader() const        { return InstanceKlass::cast(_klass)->class_loader(); }

    46   oop  protection_domain() const   { return InstanceKlass::cast(_klass)->protection_domain(); }

    47   PrivilegedElement *next() const  { return _next; }

    49   // debugging (used for find)

    50   void print_on(outputStream* st) const   PRODUCT_RETURN;

    51   bool contains(address addr)             PRODUCT_RETURN0;

    52 };

    54 #endif // SHARE_VM_PRIMS_PRIVILEGEDSTACK_HPP

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

src/share/vm/prims/privilegedStack.hpp@4c84d351cca9

src/share/vm/prims/privilegedStack.hpp