Mercurial > hg > graal-jvmci-8
annotate src/share/vm/memory/barrierSet.inline.hpp @ 1144:9b9c1ee9b3f6
Merge
author | iveresov |
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date | Wed, 06 Jan 2010 22:21:39 -0800 |
parents | 6aa7255741f3 |
children | 6484c4ee11cb |
rev | line source |
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0 | 1 /* |
196 | 2 * Copyright 2001-2008 Sun Microsystems, Inc. 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 * | |
19 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, | |
20 * CA 95054 USA or visit www.sun.com if you need additional information or | |
21 * have any questions. | |
22 * | |
23 */ | |
24 | |
25 // Inline functions of BarrierSet, which de-virtualize certain | |
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26 // performance-critical calls when the barrier is the most common |
0 | 27 // card-table kind. |
28 | |
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29 template <class T> void BarrierSet::write_ref_field_pre(T* field, oop new_val) { |
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30 if (kind() == CardTableModRef) { |
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31 ((CardTableModRefBS*)this)->inline_write_ref_field_pre(field, new_val); |
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32 } else { |
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33 write_ref_field_pre_work(field, new_val); |
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34 } |
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35 } |
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36 |
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37 void BarrierSet::write_ref_field(void* field, oop new_val) { |
0 | 38 if (kind() == CardTableModRef) { |
39 ((CardTableModRefBS*)this)->inline_write_ref_field(field, new_val); | |
40 } else { | |
41 write_ref_field_work(field, new_val); | |
42 } | |
43 } | |
44 | |
45 void BarrierSet::write_ref_array(MemRegion mr) { | |
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46 assert((HeapWord*)align_size_down((uintptr_t)mr.start(), HeapWordSize) == mr.start() , "Unaligned start"); |
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47 assert((HeapWord*)align_size_up ((uintptr_t)mr.end(), HeapWordSize) == mr.end(), "Unaligned end" ); |
0 | 48 if (kind() == CardTableModRef) { |
49 ((CardTableModRefBS*)this)->inline_write_ref_array(mr); | |
50 } else { | |
51 write_ref_array_work(mr); | |
52 } | |
53 } | |
54 | |
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55 // count is number of array elements being written |
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56 void BarrierSet::write_ref_array(HeapWord* start, size_t count) { |
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57 assert(count <= (size_t)max_intx, "count too large"); |
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58 HeapWord* end = (HeapWord*)((char*)start + (count*heapOopSize)); |
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59 // In the case of compressed oops, start and end may potentially be misaligned; |
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60 // so we need to conservatively align the first downward (this is not |
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61 // strictly necessary for current uses, but a case of good hygiene and, |
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62 // if you will, aesthetics) and the second upward (this is essential for |
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63 // current uses) to a HeapWord boundary, so we mark all cards overlapping |
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64 // this write. In the event that this evolves in the future to calling a |
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65 // logging barrier of narrow oop granularity, like the pre-barrier for G1 |
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66 // (mentioned here merely by way of example), we will need to change this |
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67 // interface, much like the pre-barrier one above, so it is "exactly precise" |
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68 // (if i may be allowed the adverbial redundancy for emphasis) and does not |
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69 // include narrow oop slots not included in the original write interval. |
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70 HeapWord* aligned_start = (HeapWord*)align_size_down((uintptr_t)start, HeapWordSize); |
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71 HeapWord* aligned_end = (HeapWord*)align_size_up ((uintptr_t)end, HeapWordSize); |
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72 // If compressed oops were not being used, these should already be aligned |
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73 assert(UseCompressedOops || (aligned_start == start && aligned_end == end), |
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74 "Expected heap word alignment of start and end"); |
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75 #if 0 |
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76 warning("Post:\t" INTPTR_FORMAT "[" SIZE_FORMAT "] : [" INTPTR_FORMAT","INTPTR_FORMAT")\t", |
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77 start, count, aligned_start, aligned_end); |
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78 #endif |
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79 write_ref_array_work(MemRegion(aligned_start, aligned_end)); |
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80 } |
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81 |
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82 |
0 | 83 void BarrierSet::write_region(MemRegion mr) { |
84 if (kind() == CardTableModRef) { | |
85 ((CardTableModRefBS*)this)->inline_write_region(mr); | |
86 } else { | |
87 write_region_work(mr); | |
88 } | |
89 } |