Mercurial > hg > truffle
view src/share/vm/gc_implementation/concurrentMarkSweep/freeChunk.cpp @ 1294:7de45b5044c3
6932270: Allow Java's ELF symtab reader to use separate debuginfo files
Reviewed-by: never
Contributed-by: Andrew Haley <aph@redhat.com>
author | never |
---|---|
date | Tue, 09 Mar 2010 11:02:39 -0800 |
parents | e018e6884bd8 |
children | c18cbe5936b8 |
line wrap: on
line source
/* * Copyright 2001-2008 Sun Microsystems, Inc. All Rights Reserved. * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. * * This code is free software; you can redistribute it and/or modify it * under the terms of the GNU General Public License version 2 only, as * published by the Free Software Foundation. * * This code is distributed in the hope that it will be useful, but WITHOUT * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License * version 2 for more details (a copy is included in the LICENSE file that * accompanied this code). * * You should have received a copy of the GNU General Public License version * 2 along with this work; if not, write to the Free Software Foundation, * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. * * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, * CA 95054 USA or visit www.sun.com if you need additional information or * have any questions. * */ # include "incls/_precompiled.incl" # include "incls/_freeChunk.cpp.incl" #ifndef PRODUCT #define baadbabeHeapWord badHeapWordVal #define deadbeefHeapWord 0xdeadbeef size_t const FreeChunk::header_size() { return sizeof(FreeChunk)/HeapWordSize; } void FreeChunk::mangleAllocated(size_t size) { // mangle all but the header of a just-allocated block // of storage assert(size >= MinChunkSize, "smallest size of object"); // we can't assert that _size == size because this may be an // allocation out of a linear allocation block assert(sizeof(FreeChunk) % HeapWordSize == 0, "shouldn't write beyond chunk"); HeapWord* addr = (HeapWord*)this; size_t hdr = header_size(); Copy::fill_to_words(addr + hdr, size - hdr, baadbabeHeapWord); } void FreeChunk::mangleFreed(size_t sz) { assert(baadbabeHeapWord != deadbeefHeapWord, "Need distinct patterns"); // mangle all but the header of a just-freed block of storage // just prior to passing it to the storage dictionary assert(sz >= MinChunkSize, "smallest size of object"); assert(sz == size(), "just checking"); HeapWord* addr = (HeapWord*)this; size_t hdr = header_size(); Copy::fill_to_words(addr + hdr, sz - hdr, deadbeefHeapWord); } void FreeChunk::verifyList() const { FreeChunk* nextFC = next(); if (nextFC != NULL) { assert(this == nextFC->prev(), "broken chain"); assert(size() == nextFC->size(), "wrong size"); nextFC->verifyList(); } } #endif void FreeChunk::print_on(outputStream* st) { st->print_cr("Next: " PTR_FORMAT " Prev: " PTR_FORMAT " %s", next(), prev(), cantCoalesce() ? "[can't coalesce]" : ""); }