Mercurial > hg > truffle
annotate src/share/vm/memory/barrierSet.inline.hpp @ 1642:0e7d2a08b605
6967423: Hotspot support for modules image
Summary: Add hotspot support for modules image
Reviewed-by: acorn
author | mchung |
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date | Wed, 07 Jul 2010 15:35:58 -0700 |
parents | c18cbe5936b8 |
children | f95d63e2154a |
rev | line source |
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0 | 1 /* |
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2 * Copyright (c) 2001, 2008, 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 | |
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 | |
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45 // count is number of array elements being written |
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46 void BarrierSet::write_ref_array(HeapWord* start, size_t count) { |
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47 assert(count <= (size_t)max_intx, "count too large"); |
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48 HeapWord* end = (HeapWord*)((char*)start + (count*heapOopSize)); |
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49 // In the case of compressed oops, start and end may potentially be misaligned; |
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50 // so we need to conservatively align the first downward (this is not |
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51 // strictly necessary for current uses, but a case of good hygiene and, |
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52 // if you will, aesthetics) and the second upward (this is essential for |
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53 // current uses) to a HeapWord boundary, so we mark all cards overlapping |
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54 // this write. If this evolves in the future to calling a |
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55 // logging barrier of narrow oop granularity, like the pre-barrier for G1 |
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56 // (mentioned here merely by way of example), we will need to change this |
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57 // interface, so it is "exactly precise" (if i may be allowed the adverbial |
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58 // redundancy for emphasis) and does not include narrow oop slots not |
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59 // included in the original write interval. |
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60 HeapWord* aligned_start = (HeapWord*)align_size_down((uintptr_t)start, HeapWordSize); |
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61 HeapWord* aligned_end = (HeapWord*)align_size_up ((uintptr_t)end, HeapWordSize); |
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62 // If compressed oops were not being used, these should already be aligned |
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63 assert(UseCompressedOops || (aligned_start == start && aligned_end == end), |
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64 "Expected heap word alignment of start and end"); |
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65 #if 0 |
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66 warning("Post:\t" INTPTR_FORMAT "[" SIZE_FORMAT "] : [" INTPTR_FORMAT","INTPTR_FORMAT")\t", |
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67 start, count, aligned_start, aligned_end); |
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68 #endif |
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69 write_ref_array_work(MemRegion(aligned_start, aligned_end)); |
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70 } |
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71 |
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72 |
0 | 73 void BarrierSet::write_region(MemRegion mr) { |
74 if (kind() == CardTableModRef) { | |
75 ((CardTableModRefBS*)this)->inline_write_region(mr); | |
76 } else { | |
77 write_region_work(mr); | |
78 } | |
79 } |