Mercurial > hg > truffle
comparison src/share/vm/gc_implementation/g1/g1ParScanThreadState.inline.hpp @ 20223:b0c374311c4e
8035400: Move G1ParScanThreadState into its own files
Summary: Extract the G1ParScanThreadState class from G1CollectedHeap.?pp into its own files.
Reviewed-by: brutisso, mgerdin
author | tschatzl |
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date | Mon, 21 Jul 2014 09:41:04 +0200 |
parents | |
children | a2328cbebb23 |
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20222:0abcece2ee27 | 20223:b0c374311c4e |
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1 /* | |
2 * Copyright (c) 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 | |
21 * questions. | |
22 * | |
23 */ | |
24 | |
25 #ifndef SHARE_VM_GC_IMPLEMENTATION_G1_G1PARSCANTHREADSTATE_INLINE_HPP | |
26 #define SHARE_VM_GC_IMPLEMENTATION_G1_G1PARSCANTHREADSTATE_INLINE_HPP | |
27 | |
28 #include "gc_implementation/g1/g1ParScanThreadState.hpp" | |
29 #include "gc_implementation/g1/g1RemSet.inline.hpp" | |
30 #include "oops/oop.inline.hpp" | |
31 | |
32 template <class T> inline void G1ParScanThreadState::immediate_rs_update(HeapRegion* from, T* p, int tid) { | |
33 if (!from->is_survivor()) { | |
34 _g1_rem->par_write_ref(from, p, tid); | |
35 } | |
36 } | |
37 | |
38 template <class T> void G1ParScanThreadState::update_rs(HeapRegion* from, T* p, int tid) { | |
39 if (G1DeferredRSUpdate) { | |
40 deferred_rs_update(from, p, tid); | |
41 } else { | |
42 immediate_rs_update(from, p, tid); | |
43 } | |
44 } | |
45 | |
46 inline void G1ParScanThreadState::do_oop_partial_array(oop* p) { | |
47 assert(has_partial_array_mask(p), "invariant"); | |
48 oop from_obj = clear_partial_array_mask(p); | |
49 | |
50 assert(Universe::heap()->is_in_reserved(from_obj), "must be in heap."); | |
51 assert(from_obj->is_objArray(), "must be obj array"); | |
52 objArrayOop from_obj_array = objArrayOop(from_obj); | |
53 // The from-space object contains the real length. | |
54 int length = from_obj_array->length(); | |
55 | |
56 assert(from_obj->is_forwarded(), "must be forwarded"); | |
57 oop to_obj = from_obj->forwardee(); | |
58 assert(from_obj != to_obj, "should not be chunking self-forwarded objects"); | |
59 objArrayOop to_obj_array = objArrayOop(to_obj); | |
60 // We keep track of the next start index in the length field of the | |
61 // to-space object. | |
62 int next_index = to_obj_array->length(); | |
63 assert(0 <= next_index && next_index < length, | |
64 err_msg("invariant, next index: %d, length: %d", next_index, length)); | |
65 | |
66 int start = next_index; | |
67 int end = length; | |
68 int remainder = end - start; | |
69 // We'll try not to push a range that's smaller than ParGCArrayScanChunk. | |
70 if (remainder > 2 * ParGCArrayScanChunk) { | |
71 end = start + ParGCArrayScanChunk; | |
72 to_obj_array->set_length(end); | |
73 // Push the remainder before we process the range in case another | |
74 // worker has run out of things to do and can steal it. | |
75 oop* from_obj_p = set_partial_array_mask(from_obj); | |
76 push_on_queue(from_obj_p); | |
77 } else { | |
78 assert(length == end, "sanity"); | |
79 // We'll process the final range for this object. Restore the length | |
80 // so that the heap remains parsable in case of evacuation failure. | |
81 to_obj_array->set_length(end); | |
82 } | |
83 _scanner.set_region(_g1h->heap_region_containing_raw(to_obj)); | |
84 // Process indexes [start,end). It will also process the header | |
85 // along with the first chunk (i.e., the chunk with start == 0). | |
86 // Note that at this point the length field of to_obj_array is not | |
87 // correct given that we are using it to keep track of the next | |
88 // start index. oop_iterate_range() (thankfully!) ignores the length | |
89 // field and only relies on the start / end parameters. It does | |
90 // however return the size of the object which will be incorrect. So | |
91 // we have to ignore it even if we wanted to use it. | |
92 to_obj_array->oop_iterate_range(&_scanner, start, end); | |
93 } | |
94 | |
95 template <class T> inline void G1ParScanThreadState::deal_with_reference(T* ref_to_scan) { | |
96 if (!has_partial_array_mask(ref_to_scan)) { | |
97 // Note: we can use "raw" versions of "region_containing" because | |
98 // "obj_to_scan" is definitely in the heap, and is not in a | |
99 // humongous region. | |
100 HeapRegion* r = _g1h->heap_region_containing_raw(ref_to_scan); | |
101 do_oop_evac(ref_to_scan, r); | |
102 } else { | |
103 do_oop_partial_array((oop*)ref_to_scan); | |
104 } | |
105 } | |
106 | |
107 inline void G1ParScanThreadState::deal_with_reference(StarTask ref) { | |
108 assert(verify_task(ref), "sanity"); | |
109 if (ref.is_narrow()) { | |
110 deal_with_reference((narrowOop*)ref); | |
111 } else { | |
112 deal_with_reference((oop*)ref); | |
113 } | |
114 } | |
115 | |
116 #endif /* SHARE_VM_GC_IMPLEMENTATION_G1_G1PARSCANTHREADSTATE_INLINE_HPP */ | |
117 |