Mercurial > hg > truffle
annotate src/share/vm/memory/referencePolicy.cpp @ 783:a9e116455022
6832293: JIT compiler got wrong result in type checking with -server
Summary: Check for an object array of interface in CmpPNode::sub().
Reviewed-by: never
author | kvn |
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date | Mon, 11 May 2009 17:59:54 -0700 |
parents | ad8c8ca4ab0f |
children | c18cbe5936b8 |
rev | line source |
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0 | 1 /* |
470 | 2 * Copyright 2000-2008 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 # include "incls/_precompiled.incl" | |
26 # include "incls/_referencePolicy.cpp.incl" | |
27 | |
28 LRUCurrentHeapPolicy::LRUCurrentHeapPolicy() { | |
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29 setup(); |
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30 } |
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31 |
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32 // Capture state (of-the-VM) information needed to evaluate the policy |
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33 void LRUCurrentHeapPolicy::setup() { |
0 | 34 _max_interval = (Universe::get_heap_free_at_last_gc() / M) * SoftRefLRUPolicyMSPerMB; |
35 assert(_max_interval >= 0,"Sanity check"); | |
36 } | |
37 | |
38 // The oop passed in is the SoftReference object, and not | |
39 // the object the SoftReference points to. | |
40 bool LRUCurrentHeapPolicy::should_clear_reference(oop p) { | |
41 jlong interval = java_lang_ref_SoftReference::clock() - java_lang_ref_SoftReference::timestamp(p); | |
42 assert(interval >= 0, "Sanity check"); | |
43 | |
44 // The interval will be zero if the ref was accessed since the last scavenge/gc. | |
45 if(interval <= _max_interval) { | |
46 return false; | |
47 } | |
48 | |
49 return true; | |
50 } | |
51 | |
52 /////////////////////// MaxHeap ////////////////////// | |
53 | |
54 LRUMaxHeapPolicy::LRUMaxHeapPolicy() { | |
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55 setup(); |
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56 } |
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57 |
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58 // Capture state (of-the-VM) information needed to evaluate the policy |
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59 void LRUMaxHeapPolicy::setup() { |
0 | 60 size_t max_heap = MaxHeapSize; |
61 max_heap -= Universe::get_heap_used_at_last_gc(); | |
62 max_heap /= M; | |
63 | |
64 _max_interval = max_heap * SoftRefLRUPolicyMSPerMB; | |
65 assert(_max_interval >= 0,"Sanity check"); | |
66 } | |
67 | |
68 // The oop passed in is the SoftReference object, and not | |
69 // the object the SoftReference points to. | |
70 bool LRUMaxHeapPolicy::should_clear_reference(oop p) { | |
71 jlong interval = java_lang_ref_SoftReference::clock() - java_lang_ref_SoftReference::timestamp(p); | |
72 assert(interval >= 0, "Sanity check"); | |
73 | |
74 // The interval will be zero if the ref was accessed since the last scavenge/gc. | |
75 if(interval <= _max_interval) { | |
76 return false; | |
77 } | |
78 | |
79 return true; | |
80 } |