jdk8-mips64-public/hotspot: src/share/vm/gc_implementation/concurrentMarkSweep/freeChunk.cpp@7426d8d76305

8034761: Remove the do_code_roots parameter from process_strong_roots
Reviewed-by: tschatzl, mgerdin, jmasa

     1 /*

     2  * Copyright (c) 2001, 2014, 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

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    23  */

    25 #include "precompiled.hpp"

    26 #include "gc_implementation/concurrentMarkSweep/freeChunk.hpp"

    27 #include "memory/freeBlockDictionary.hpp"

    28 #include "utilities/copy.hpp"

    30 PRAGMA_FORMAT_MUTE_WARNINGS_FOR_GCC

    32 #ifndef PRODUCT

    34 #define baadbabeHeapWord badHeapWordVal

    35 #define deadbeefHeapWord 0xdeadbeef

    37 size_t const FreeChunk::header_size() {

    38   return sizeof(FreeChunk)/HeapWordSize;

    39 }

    41 void FreeChunk::mangleAllocated(size_t size) {

    42   // mangle all but the header of a just-allocated block

    43   // of storage

    44   assert(size >= MinChunkSize, "smallest size of object");

    45   // we can't assert that _size == size because this may be an

    46   // allocation out of a linear allocation block

    47   assert(sizeof(FreeChunk) % HeapWordSize == 0,

    48          "shouldn't write beyond chunk");

    49   HeapWord* addr = (HeapWord*)this;

    50   size_t hdr = header_size();

    51   Copy::fill_to_words(addr + hdr, size - hdr, baadbabeHeapWord);

    52 }

    54 void FreeChunk::mangleFreed(size_t sz) {

    55   assert(baadbabeHeapWord != deadbeefHeapWord, "Need distinct patterns");

    56   // mangle all but the header of a just-freed block of storage

    57   // just prior to passing it to the storage dictionary

    58   assert(sz >= MinChunkSize, "smallest size of object");

    59   assert(sz == size(), "just checking");

    60   HeapWord* addr = (HeapWord*)this;

    61   size_t hdr = header_size();

    62   Copy::fill_to_words(addr + hdr, sz - hdr, deadbeefHeapWord);

    63 }

    65 void FreeChunk::verifyList() const {

    66   FreeChunk* nextFC = next();

    67   if (nextFC != NULL) {

    68     assert(this == nextFC->prev(), "broken chain");

    69     assert(size() == nextFC->size(), "wrong size");

    70     nextFC->verifyList();

    71   }

    72 }

    73 #endif

    75 void FreeChunk::print_on(outputStream* st) {

    76   st->print_cr("Next: " PTR_FORMAT " Prev: " PTR_FORMAT " %s",

    77     next(), prev(), cantCoalesce() ? "[can't coalesce]" : "");

    78 }

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