Mercurial > hg > truffle
annotate src/share/vm/memory/defNewGeneration.inline.hpp @ 6087:e2961d14584b
7169934: pow(x,y) or x64 computes incorrect result when x<0 and y is an odd integer
Summary: bad test for parity of y in pow(x,y) (c1, interpreter)
Reviewed-by: kvn, twisti
author | roland |
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date | Mon, 21 May 2012 09:46:02 +0200 |
parents | f95d63e2154a |
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rev | line source |
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0 | 1 /* |
1972 | 2 * Copyright (c) 2001, 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 * | |
1552
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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_MEMORY_DEFNEWGENERATION_INLINE_HPP |
26 #define SHARE_VM_MEMORY_DEFNEWGENERATION_INLINE_HPP | |
27 | |
28 #include "memory/cardTableRS.hpp" | |
29 #include "memory/defNewGeneration.hpp" | |
30 #include "memory/space.hpp" | |
31 | |
113
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32 // Methods of protected closure types |
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33 |
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34 template <class T> |
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35 inline void DefNewGeneration::KeepAliveClosure::do_oop_work(T* p) { |
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36 #ifdef ASSERT |
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37 { |
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38 // We never expect to see a null reference being processed |
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39 // as a weak reference. |
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40 assert (!oopDesc::is_null(*p), "expected non-null ref"); |
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41 oop obj = oopDesc::load_decode_heap_oop_not_null(p); |
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42 assert (obj->is_oop(), "expected an oop while scanning weak refs"); |
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43 } |
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44 #endif // ASSERT |
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45 |
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46 _cl->do_oop_nv(p); |
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47 |
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48 // Card marking is trickier for weak refs. |
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49 // This oop is a 'next' field which was filled in while we |
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50 // were discovering weak references. While we might not need |
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51 // to take a special action to keep this reference alive, we |
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52 // will need to dirty a card as the field was modified. |
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53 // |
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54 // Alternatively, we could create a method which iterates through |
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55 // each generation, allowing them in turn to examine the modified |
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56 // field. |
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57 // |
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58 // We could check that p is also in an older generation, but |
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59 // dirty cards in the youngest gen are never scanned, so the |
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60 // extra check probably isn't worthwhile. |
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61 if (Universe::heap()->is_in_reserved(p)) { |
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62 oop obj = oopDesc::load_decode_heap_oop_not_null(p); |
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63 _rs->inline_write_ref_field_gc(p, obj); |
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64 } |
0 | 65 } |
66 | |
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67 template <class T> |
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68 inline void DefNewGeneration::FastKeepAliveClosure::do_oop_work(T* p) { |
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69 #ifdef ASSERT |
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70 { |
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71 // We never expect to see a null reference being processed |
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72 // as a weak reference. |
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73 assert (!oopDesc::is_null(*p), "expected non-null ref"); |
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74 oop obj = oopDesc::load_decode_heap_oop_not_null(p); |
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75 assert (obj->is_oop(), "expected an oop while scanning weak refs"); |
0 | 76 } |
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77 #endif // ASSERT |
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78 |
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79 _cl->do_oop_nv(p); |
0 | 80 |
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81 // Optimized for Defnew generation if it's the youngest generation: |
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82 // we set a younger_gen card if we have an older->youngest |
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83 // generation pointer. |
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84 oop obj = oopDesc::load_decode_heap_oop_not_null(p); |
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85 if (((HeapWord*)obj < _boundary) && Universe::heap()->is_in_reserved(p)) { |
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86 _rs->inline_write_ref_field_gc(p, obj); |
0 | 87 } |
88 } | |
1972 | 89 |
90 #endif // SHARE_VM_MEMORY_DEFNEWGENERATION_INLINE_HPP |