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src/share/vm/gc_implementation/g1/heapRegion.inline.hpp@0ac769a57c64 (annotated)
src/share/vm/gc_implementation/g1/heapRegion.inline.hpp
Tue, 01 Mar 2011 14:56:48 -0800
- author
- iveresov
- date
- Tue, 01 Mar 2011 14:56:48 -0800
- changeset 2606
- 0ac769a57c64
- parent 2314
- f95d63e2154a
- child 2715
- abdfc822206f
- permissions
- -rw-r--r--
6627983: G1: Bad oop deference during marking
Summary: Bulk zeroing reduction didn't work with G1, because arraycopy would call pre-barriers on uninitialized oops. The solution is to have version of arraycopy stubs that don't have pre-barriers. Also refactored arraycopy stubs generation on SPARC to be more readable and reduced the number of stubs necessary in some cases.
Reviewed-by: jrose, kvn, never
| ysr@777 | 1 | /* |
| stefank@2314 | 2 | * Copyright (c) 2001, 2010, Oracle and/or its affiliates. All rights reserved. |
| ysr@777 | 3 | * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| ysr@777 | 4 | * |
| ysr@777 | 5 | * This code is free software; you can redistribute it and/or modify it |
| ysr@777 | 6 | * under the terms of the GNU General Public License version 2 only, as |
| ysr@777 | 7 | * published by the Free Software Foundation. |
| ysr@777 | 8 | * |
| ysr@777 | 9 | * This code is distributed in the hope that it will be useful, but WITHOUT |
| ysr@777 | 10 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| ysr@777 | 11 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| ysr@777 | 12 | * version 2 for more details (a copy is included in the LICENSE file that |
| ysr@777 | 13 | * accompanied this code). |
| ysr@777 | 14 | * |
| ysr@777 | 15 | * You should have received a copy of the GNU General Public License version |
| ysr@777 | 16 | * 2 along with this work; if not, write to the Free Software Foundation, |
| ysr@777 | 17 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| ysr@777 | 18 | * |
| trims@1907 | 19 | * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| trims@1907 | 20 | * or visit www.oracle.com if you need additional information or have any |
| trims@1907 | 21 | * questions. |
| ysr@777 | 22 | * |
| ysr@777 | 23 | */ |
| ysr@777 | 24 | |
| stefank@2314 | 25 | #ifndef SHARE_VM_GC_IMPLEMENTATION_G1_HEAPREGION_INLINE_HPP |
| stefank@2314 | 26 | #define SHARE_VM_GC_IMPLEMENTATION_G1_HEAPREGION_INLINE_HPP |
| stefank@2314 | 27 | |
| ysr@777 | 28 | inline HeapWord* G1OffsetTableContigSpace::allocate(size_t size) { |
| ysr@777 | 29 | HeapWord* res = ContiguousSpace::allocate(size); |
| ysr@777 | 30 | if (res != NULL) { |
| ysr@777 | 31 | _offsets.alloc_block(res, size); |
| ysr@777 | 32 | } |
| ysr@777 | 33 | return res; |
| ysr@777 | 34 | } |
| ysr@777 | 35 | |
| ysr@777 | 36 | // Because of the requirement of keeping "_offsets" up to date with the |
| ysr@777 | 37 | // allocations, we sequentialize these with a lock. Therefore, best if |
| ysr@777 | 38 | // this is used for larger LAB allocations only. |
| ysr@777 | 39 | inline HeapWord* G1OffsetTableContigSpace::par_allocate(size_t size) { |
| ysr@777 | 40 | MutexLocker x(&_par_alloc_lock); |
| ysr@777 | 41 | // This ought to be just "allocate", because of the lock above, but that |
| ysr@777 | 42 | // ContiguousSpace::allocate asserts that either the allocating thread |
| ysr@777 | 43 | // holds the heap lock or it is the VM thread and we're at a safepoint. |
| ysr@777 | 44 | // The best I (dld) could figure was to put a field in ContiguousSpace |
| ysr@777 | 45 | // meaning "locking at safepoint taken care of", and set/reset that |
| ysr@777 | 46 | // here. But this will do for now, especially in light of the comment |
| ysr@777 | 47 | // above. Perhaps in the future some lock-free manner of keeping the |
| ysr@777 | 48 | // coordination. |
| ysr@777 | 49 | HeapWord* res = ContiguousSpace::par_allocate(size); |
| ysr@777 | 50 | if (res != NULL) { |
| ysr@777 | 51 | _offsets.alloc_block(res, size); |
| ysr@777 | 52 | } |
| ysr@777 | 53 | return res; |
| ysr@777 | 54 | } |
| ysr@777 | 55 | |
| ysr@777 | 56 | inline HeapWord* G1OffsetTableContigSpace::block_start(const void* p) { |
| ysr@777 | 57 | return _offsets.block_start(p); |
| ysr@777 | 58 | } |
| ysr@777 | 59 | |
| ysr@777 | 60 | inline HeapWord* |
| ysr@777 | 61 | G1OffsetTableContigSpace::block_start_const(const void* p) const { |
| ysr@777 | 62 | return _offsets.block_start_const(p); |
| ysr@777 | 63 | } |
| stefank@2314 | 64 | |
| stefank@2314 | 65 | #endif // SHARE_VM_GC_IMPLEMENTATION_G1_HEAPREGION_INLINE_HPP |
