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src/share/vm/gc_implementation/parallelScavenge/psScavenge.inline.hpp@1fb790245268 (annotated)
src/share/vm/gc_implementation/parallelScavenge/psScavenge.inline.hpp
Fri, 11 Mar 2011 16:35:18 +0100
- author
- jwilhelm
- date
- Fri, 11 Mar 2011 16:35:18 +0100
- changeset 2648
- 1fb790245268
- parent 2314
- f95d63e2154a
- child 2661
- b099aaf51bf8
- permissions
- -rw-r--r--
6820066: Check that -XX:ParGCArrayScanChunk has a value larger than zero.
Summary: Check that -XX:ParGCArrayScanChunk has a value larger than zero.
Reviewed-by: johnc, jmasa, ysr
| duke@435 | 1 | /* |
| stefank@2314 | 2 | * Copyright (c) 2002, 2010, Oracle and/or its affiliates. All rights reserved. |
| duke@435 | 3 | * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| duke@435 | 4 | * |
| duke@435 | 5 | * This code is free software; you can redistribute it and/or modify it |
| duke@435 | 6 | * under the terms of the GNU General Public License version 2 only, as |
| duke@435 | 7 | * published by the Free Software Foundation. |
| duke@435 | 8 | * |
| duke@435 | 9 | * This code is distributed in the hope that it will be useful, but WITHOUT |
| duke@435 | 10 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| duke@435 | 11 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| duke@435 | 12 | * version 2 for more details (a copy is included in the LICENSE file that |
| duke@435 | 13 | * accompanied this code). |
| duke@435 | 14 | * |
| duke@435 | 15 | * You should have received a copy of the GNU General Public License version |
| duke@435 | 16 | * 2 along with this work; if not, write to the Free Software Foundation, |
| duke@435 | 17 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| duke@435 | 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. |
| duke@435 | 22 | * |
| duke@435 | 23 | */ |
| duke@435 | 24 | |
| stefank@2314 | 25 | #ifndef SHARE_VM_GC_IMPLEMENTATION_PARALLELSCAVENGE_PSSCAVENGE_INLINE_HPP |
| stefank@2314 | 26 | #define SHARE_VM_GC_IMPLEMENTATION_PARALLELSCAVENGE_PSSCAVENGE_INLINE_HPP |
| stefank@2314 | 27 | |
| stefank@2314 | 28 | #include "gc_implementation/parallelScavenge/cardTableExtension.hpp" |
| stefank@2314 | 29 | #include "gc_implementation/parallelScavenge/parallelScavengeHeap.hpp" |
| stefank@2314 | 30 | #include "gc_implementation/parallelScavenge/psPromotionManager.hpp" |
| stefank@2314 | 31 | #include "gc_implementation/parallelScavenge/psScavenge.hpp" |
| stefank@2314 | 32 | |
| duke@435 | 33 | inline void PSScavenge::save_to_space_top_before_gc() { |
| duke@435 | 34 | ParallelScavengeHeap* heap = (ParallelScavengeHeap*)Universe::heap(); |
| duke@435 | 35 | _to_space_top_before_gc = heap->young_gen()->to_space()->top(); |
| duke@435 | 36 | } |
| duke@435 | 37 | |
| coleenp@548 | 38 | template <class T> inline bool PSScavenge::should_scavenge(T* p) { |
| coleenp@548 | 39 | T heap_oop = oopDesc::load_heap_oop(p); |
| coleenp@548 | 40 | if (oopDesc::is_null(heap_oop)) return false; |
| coleenp@548 | 41 | oop obj = oopDesc::decode_heap_oop_not_null(heap_oop); |
| coleenp@548 | 42 | return PSScavenge::is_obj_in_young((HeapWord*)obj); |
| duke@435 | 43 | } |
| duke@435 | 44 | |
| coleenp@548 | 45 | template <class T> |
| coleenp@548 | 46 | inline bool PSScavenge::should_scavenge(T* p, MutableSpace* to_space) { |
| duke@435 | 47 | if (should_scavenge(p)) { |
| coleenp@548 | 48 | oop obj = oopDesc::load_decode_heap_oop_not_null(p); |
| duke@435 | 49 | // Skip objects copied to to_space since the scavenge started. |
| coleenp@548 | 50 | HeapWord* const addr = (HeapWord*)obj; |
| duke@435 | 51 | return addr < to_space_top_before_gc() || addr >= to_space->end(); |
| duke@435 | 52 | } |
| duke@435 | 53 | return false; |
| duke@435 | 54 | } |
| duke@435 | 55 | |
| coleenp@548 | 56 | template <class T> |
| coleenp@548 | 57 | inline bool PSScavenge::should_scavenge(T* p, bool check_to_space) { |
| duke@435 | 58 | if (check_to_space) { |
| coleenp@548 | 59 | ParallelScavengeHeap* heap = (ParallelScavengeHeap*)Universe::heap(); |
| duke@435 | 60 | return should_scavenge(p, heap->young_gen()->to_space()); |
| duke@435 | 61 | } |
| duke@435 | 62 | return should_scavenge(p); |
| duke@435 | 63 | } |
| duke@435 | 64 | |
| duke@435 | 65 | // Attempt to "claim" oop at p via CAS, push the new obj if successful |
| duke@435 | 66 | // This version tests the oop* to make sure it is within the heap before |
| duke@435 | 67 | // attempting marking. |
| coleenp@548 | 68 | template <class T> |
| duke@435 | 69 | inline void PSScavenge::copy_and_push_safe_barrier(PSPromotionManager* pm, |
| coleenp@548 | 70 | T* p) { |
| coleenp@548 | 71 | assert(should_scavenge(p, true), "revisiting object?"); |
| duke@435 | 72 | |
| coleenp@548 | 73 | oop o = oopDesc::load_decode_heap_oop_not_null(p); |
| coleenp@548 | 74 | oop new_obj = o->is_forwarded() |
| coleenp@548 | 75 | ? o->forwardee() |
| tonyp@2061 | 76 | : pm->copy_to_survivor_space(o); |
| coleenp@548 | 77 | oopDesc::encode_store_heap_oop_not_null(p, new_obj); |
| duke@435 | 78 | |
| duke@435 | 79 | // We cannot mark without test, as some code passes us pointers |
| duke@435 | 80 | // that are outside the heap. |
| coleenp@548 | 81 | if ((!PSScavenge::is_obj_in_young((HeapWord*)p)) && |
| duke@435 | 82 | Universe::heap()->is_in_reserved(p)) { |
| coleenp@548 | 83 | if (PSScavenge::is_obj_in_young((HeapWord*)new_obj)) { |
| coleenp@548 | 84 | card_table()->inline_write_ref_field_gc(p, new_obj); |
| duke@435 | 85 | } |
| duke@435 | 86 | } |
| duke@435 | 87 | } |
| stefank@2314 | 88 | |
| stefank@2314 | 89 | #endif // SHARE_VM_GC_IMPLEMENTATION_PARALLELSCAVENGE_PSSCAVENGE_INLINE_HPP |
