Mercurial > hg > graal-jvmci-8
annotate src/share/vm/runtime/handles.inline.hpp @ 3979:4dfb2df418f2
6484982: G1: process references during evacuation pauses
Summary: G1 now uses two reference processors - one is used by concurrent marking and the other is used by STW GCs (both full and incremental evacuation pauses). In an evacuation pause, the reference processor is embedded into the closures used to scan objects. Doing so causes causes reference objects to be 'discovered' by the reference processor. At the end of the evacuation pause, these discovered reference objects are processed - preserving (and copying) referent objects (and their reachable graphs) as appropriate.
Reviewed-by: ysr, jwilhelm, brutisso, stefank, tonyp
| author | johnc |
|---|---|
| date | Thu, 22 Sep 2011 10:57:37 -0700 |
| parents | f95d63e2154a |
| children | f08d439fab8c |
| rev | line source |
|---|---|
| 0 | 1 /* |
| 1972 | 2 * Copyright (c) 1998, 2010, Oracle and/or its affiliates. All rights reserved. |
| 0 | 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 * | |
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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20 * or visit www.oracle.com if you need additional information or have any |
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21 * questions. |
| 0 | 22 * |
| 23 */ | |
| 24 | |
| 1972 | 25 #ifndef SHARE_VM_RUNTIME_HANDLES_INLINE_HPP |
| 26 #define SHARE_VM_RUNTIME_HANDLES_INLINE_HPP | |
| 27 | |
| 28 #include "runtime/handles.hpp" | |
| 29 #ifdef TARGET_OS_FAMILY_linux | |
| 30 # include "thread_linux.inline.hpp" | |
| 31 #endif | |
| 32 #ifdef TARGET_OS_FAMILY_solaris | |
| 33 # include "thread_solaris.inline.hpp" | |
| 34 #endif | |
| 35 #ifdef TARGET_OS_FAMILY_windows | |
| 36 # include "thread_windows.inline.hpp" | |
| 37 #endif | |
| 38 | |
| 0 | 39 // these inline functions are in a separate file to break an include cycle |
| 40 // between Thread and Handle | |
| 41 | |
| 42 inline Handle::Handle(oop obj) { | |
| 43 if (obj == NULL) { | |
| 44 _handle = NULL; | |
| 45 } else { | |
| 46 _handle = Thread::current()->handle_area()->allocate_handle(obj); | |
| 47 } | |
| 48 } | |
| 49 | |
| 50 | |
| 51 #ifndef ASSERT | |
| 52 inline Handle::Handle(Thread* thread, oop obj) { | |
| 53 assert(thread == Thread::current(), "sanity check"); | |
| 54 if (obj == NULL) { | |
| 55 _handle = NULL; | |
| 56 } else { | |
| 57 _handle = thread->handle_area()->allocate_handle(obj); | |
| 58 } | |
| 59 } | |
| 60 #endif // ASSERT | |
| 61 | |
| 62 | |
| 63 inline HandleMark::HandleMark() { | |
| 64 initialize(Thread::current()); | |
| 65 } | |
| 66 | |
| 67 | |
| 68 inline void HandleMark::push() { | |
| 69 // This is intentionally a NOP. pop_and_restore will reset | |
| 70 // values to the HandleMark further down the stack, typically | |
| 71 // in JavaCalls::call_helper. | |
| 72 debug_only(_area->_handle_mark_nesting++); | |
| 73 } | |
| 74 | |
| 75 inline void HandleMark::pop_and_restore() { | |
| 76 HandleArea* area = _area; // help compilers with poor alias analysis | |
| 77 // Delete later chunks | |
| 78 if( _chunk->next() ) { | |
| 79 _chunk->next_chop(); | |
| 80 } | |
| 81 // Roll back arena to saved top markers | |
| 82 area->_chunk = _chunk; | |
| 83 area->_hwm = _hwm; | |
| 84 area->_max = _max; | |
| 85 NOT_PRODUCT(area->set_size_in_bytes(_size_in_bytes);) | |
| 86 debug_only(area->_handle_mark_nesting--); | |
| 87 } | |
| 1972 | 88 |
| 89 #endif // SHARE_VM_RUNTIME_HANDLES_INLINE_HPP |