jdk8-mips64-public/hotspot: src/share/vm/services/memPtr.cpp@33143ee07800

7181995: NMT ON: NMT assertion failure assert(cur_vm->is_uncommit_record() || cur_vm->is_deallocation_record
Summary: Fixed virtual memory records merge and promotion logic, should be based on sequence number vs. base address order
Reviewed-by: coleenp, acorn

     1 /*

     2  * Copyright (c) 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 #include "precompiled.hpp"

    26 #include "services/memPtr.hpp"

    27 #include "services/memTracker.hpp"

    29 volatile jint SequenceGenerator::_seq_number = 1;

    30 NOT_PRODUCT(jint SequenceGenerator::_max_seq_number = 1;)

    31 DEBUG_ONLY(volatile unsigned long SequenceGenerator::_generation = 0;)

    33 jint SequenceGenerator::next() {

    34   jint seq = Atomic::add(1, &_seq_number);

    35   if (seq < 0) {

    36     MemTracker::shutdown(MemTracker::NMT_sequence_overflow);

    37   }

    38   assert(seq > 0, "counter overflow");

    39   NOT_PRODUCT(_max_seq_number = (seq > _max_seq_number) ? seq : _max_seq_number;)

    40   return seq;

    41 }

    45 bool VMMemRegion::contains(const VMMemRegion* mr) const {

    46   assert(base() != 0, "Sanity check");

    47   assert(size() != 0 || committed_size() != 0,

    48     "Sanity check");

    49   address base_addr = base();

    50   address end_addr = base_addr +

    51     (is_reserve_record()? reserved_size(): committed_size());

    52   if (mr->is_reserve_record()) {

    53     if (mr->base() == base_addr && mr->size() == size()) {

    54       // the same range

    55       return true;

    56     }

    57     return false;

    58   } else if (mr->is_commit_record() || mr->is_uncommit_record()) {

    59     assert(mr->base() != 0 && mr->committed_size() > 0,

    60       "bad record");

    61     return (mr->base() >= base_addr &&

    62       (mr->base() + mr->committed_size()) <= end_addr);

    63   } else if (mr->is_type_tagging_record()) {

    64     assert(mr->base() != NULL, "Sanity check");

    65     return (mr->base() >= base_addr && mr->base() < end_addr);

    66   } else if (mr->is_release_record()) {

    67     assert(mr->base() != 0 && mr->size() > 0,

    68       "bad record");

    69     return (mr->base() == base_addr && mr->size() == size());

    70   } else {

    71     ShouldNotReachHere();

    72     return false;

    73   }

    74 }

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

src/share/vm/services/memPtr.cpp@33143ee07800

src/share/vm/services/memPtr.cpp