Mercurial > hg > truffle
annotate src/share/vm/code/oopRecorder.cpp @ 1972:f95d63e2154a
6989984: Use standard include model for Hospot
Summary: Replaced MakeDeps and the includeDB files with more standardized solutions.
Reviewed-by: coleenp, kvn, kamg
| author | stefank |
|---|---|
| date | Tue, 23 Nov 2010 13:22:55 -0800 |
| parents | e9ff18c4ace7 |
| children | da91efe96a93 |
| rev | line source |
|---|---|
| 0 | 1 /* |
| 1579 | 2 * Copyright (c) 1998, 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 * | |
|
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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 #include "precompiled.hpp" |
| 26 #include "code/oopRecorder.hpp" | |
| 27 #include "memory/allocation.inline.hpp" | |
| 28 #include "oops/oop.inline.hpp" | |
| 0 | 29 |
| 30 #ifdef ASSERT | |
| 31 int OopRecorder::_find_index_calls = 0; | |
| 32 int OopRecorder::_hit_indexes = 0; | |
| 33 int OopRecorder::_missed_indexes = 0; | |
| 34 #endif //ASSERT | |
| 35 | |
| 36 | |
| 37 OopRecorder::OopRecorder(Arena* arena) { | |
| 38 _handles = NULL; | |
| 39 _indexes = NULL; | |
| 40 _arena = arena; | |
| 41 _complete = false; | |
| 42 } | |
| 43 | |
| 44 OopRecorder::IndexCache::IndexCache() { | |
| 45 assert(first_index > 0, "initial zero state of cache must be invalid index"); | |
| 46 Copy::zero_to_bytes(&_cache[0], sizeof(_cache)); | |
| 47 } | |
| 48 | |
| 49 int OopRecorder::oop_size() { | |
| 50 _complete = true; | |
| 51 if (_handles == NULL) return 0; | |
| 52 return _handles->length() * sizeof(oop); | |
| 53 } | |
| 54 | |
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55 void OopRecorder::copy_to(nmethod* nm) { |
| 0 | 56 assert(_complete, "must be frozen"); |
| 57 maybe_initialize(); // get non-null handles, even if we have no oops | |
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58 nm->copy_oops(_handles); |
| 0 | 59 } |
| 60 | |
| 61 void OopRecorder::maybe_initialize() { | |
| 62 if (_handles == NULL) { | |
| 63 if (_arena != NULL) { | |
| 64 _handles = new(_arena) GrowableArray<jobject>(_arena, 10, 0, 0); | |
| 65 _no_finds = new(_arena) GrowableArray<int>( _arena, 10, 0, 0); | |
| 66 } else { | |
| 67 _handles = new GrowableArray<jobject>(10, 0, 0); | |
| 68 _no_finds = new GrowableArray<int>( 10, 0, 0); | |
| 69 } | |
| 70 } | |
| 71 } | |
| 72 | |
| 73 | |
| 74 jobject OopRecorder::handle_at(int index) { | |
| 75 // there is always a NULL virtually present as first object | |
| 76 if (index == null_index) return NULL; | |
| 77 return _handles->at(index - first_index); | |
| 78 } | |
| 79 | |
| 80 | |
| 81 // Local definition. Used only in this module. | |
| 82 inline bool OopRecorder::is_real_jobject(jobject h) { | |
| 83 return h != NULL && h != (jobject)Universe::non_oop_word(); | |
| 84 } | |
| 85 | |
| 86 | |
| 87 int OopRecorder::add_handle(jobject h, bool make_findable) { | |
| 88 assert(!_complete, "cannot allocate more elements after size query"); | |
| 89 maybe_initialize(); | |
| 90 // indexing uses 1 as an origin--0 means null | |
| 91 int index = _handles->length() + first_index; | |
| 92 _handles->append(h); | |
| 93 | |
| 94 // Support correct operation of find_index(). | |
| 95 assert(!(make_findable && !is_real_jobject(h)), "nulls are not findable"); | |
| 96 if (make_findable) { | |
| 97 // This index may be returned from find_index(). | |
| 98 if (_indexes != NULL) { | |
| 99 int* cloc = _indexes->cache_location(h); | |
| 100 _indexes->set_cache_location_index(cloc, index); | |
| 101 } else if (index == index_cache_threshold && _arena != NULL) { | |
| 102 _indexes = new(_arena) IndexCache(); | |
| 103 for (int i = 0; i < _handles->length(); i++) { | |
| 104 // Load the cache with pre-existing elements. | |
| 105 int index0 = i + first_index; | |
| 106 if (_no_finds->contains(index0)) continue; | |
| 107 int* cloc = _indexes->cache_location(_handles->at(i)); | |
| 108 _indexes->set_cache_location_index(cloc, index0); | |
| 109 } | |
| 110 } | |
| 111 } else if (is_real_jobject(h)) { | |
| 112 // Remember that this index is not to be returned from find_index(). | |
| 113 // This case is rare, because most or all uses of allocate_index pass | |
| 114 // a jobject argument of NULL or Universe::non_oop_word. | |
| 115 // Thus, the expected length of _no_finds is zero. | |
| 116 _no_finds->append(index); | |
| 117 } | |
| 118 | |
| 119 return index; | |
| 120 } | |
| 121 | |
| 122 | |
| 123 int OopRecorder::maybe_find_index(jobject h) { | |
| 124 debug_only(_find_index_calls++); | |
| 125 assert(!_complete, "cannot allocate more elements after size query"); | |
| 126 maybe_initialize(); | |
| 127 if (h == NULL) return null_index; | |
| 128 assert(is_real_jobject(h), "must be valid jobject"); | |
| 129 int* cloc = (_indexes == NULL)? NULL: _indexes->cache_location(h); | |
| 130 if (cloc != NULL) { | |
| 131 int cindex = _indexes->cache_location_index(cloc); | |
| 132 if (cindex == 0) { | |
| 133 return -1; // We know this handle is completely new. | |
| 134 } | |
| 135 if (cindex >= first_index && _handles->at(cindex - first_index) == h) { | |
| 136 debug_only(_hit_indexes++); | |
| 137 return cindex; | |
| 138 } | |
| 139 if (!_indexes->cache_location_collision(cloc)) { | |
| 140 return -1; // We know the current cache occupant is unique to that cloc. | |
| 141 } | |
| 142 } | |
| 143 | |
| 144 // Not found in cache, due to a cache collision. (Or, no cache at all.) | |
| 145 // Do a linear search, most recent to oldest. | |
| 146 for (int i = _handles->length() - 1; i >= 0; i--) { | |
| 147 if (_handles->at(i) == h) { | |
| 148 int findex = i + first_index; | |
| 149 if (_no_finds->contains(findex)) continue; // oops; skip this one | |
| 150 if (cloc != NULL) { | |
| 151 _indexes->set_cache_location_index(cloc, findex); | |
| 152 } | |
| 153 debug_only(_missed_indexes++); | |
| 154 return findex; | |
| 155 } | |
| 156 } | |
| 157 return -1; | |
| 158 } |