Thu, 13 Jun 2013 22:02:40 -0700
8014431: cleanup warnings indicated by the -Wunused-value compiler option on linux
Reviewed-by: dholmes, coleenp
Contributed-by: jeremymanson@google.com, calvin.cheung@oracle.com
duke@435 | 1 | /* |
coleenp@4037 | 2 | * Copyright (c) 2001, 2012, Oracle and/or its affiliates. All rights reserved. |
duke@435 | 3 | * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
duke@435 | 4 | * |
duke@435 | 5 | * This code is free software; you can redistribute it and/or modify it |
duke@435 | 6 | * under the terms of the GNU General Public License version 2 only, as |
duke@435 | 7 | * published by the Free Software Foundation. |
duke@435 | 8 | * |
duke@435 | 9 | * This code is distributed in the hope that it will be useful, but WITHOUT |
duke@435 | 10 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
duke@435 | 11 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
duke@435 | 12 | * version 2 for more details (a copy is included in the LICENSE file that |
duke@435 | 13 | * accompanied this code). |
duke@435 | 14 | * |
duke@435 | 15 | * You should have received a copy of the GNU General Public License version |
duke@435 | 16 | * 2 along with this work; if not, write to the Free Software Foundation, |
duke@435 | 17 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
duke@435 | 18 | * |
trims@1907 | 19 | * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
trims@1907 | 20 | * or visit www.oracle.com if you need additional information or have any |
trims@1907 | 21 | * questions. |
duke@435 | 22 | * |
duke@435 | 23 | */ |
duke@435 | 24 | |
stefank@2314 | 25 | #ifndef SHARE_VM_MEMORY_GENOOPCLOSURES_INLINE_HPP |
stefank@2314 | 26 | #define SHARE_VM_MEMORY_GENOOPCLOSURES_INLINE_HPP |
stefank@2314 | 27 | |
stefank@2314 | 28 | #include "memory/cardTableRS.hpp" |
stefank@2314 | 29 | #include "memory/defNewGeneration.hpp" |
stefank@2314 | 30 | #include "memory/genCollectedHeap.hpp" |
stefank@2314 | 31 | #include "memory/genOopClosures.hpp" |
stefank@2314 | 32 | #include "memory/genRemSet.hpp" |
stefank@2314 | 33 | #include "memory/generation.hpp" |
stefank@2314 | 34 | #include "memory/sharedHeap.hpp" |
stefank@2314 | 35 | #include "memory/space.hpp" |
stefank@2314 | 36 | |
duke@435 | 37 | inline OopsInGenClosure::OopsInGenClosure(Generation* gen) : |
coleenp@4037 | 38 | ExtendedOopClosure(gen->ref_processor()), _orig_gen(gen), _rs(NULL) { |
duke@435 | 39 | set_generation(gen); |
duke@435 | 40 | } |
duke@435 | 41 | |
duke@435 | 42 | inline void OopsInGenClosure::set_generation(Generation* gen) { |
duke@435 | 43 | _gen = gen; |
duke@435 | 44 | _gen_boundary = _gen->reserved().start(); |
duke@435 | 45 | // Barrier set for the heap, must be set after heap is initialized |
duke@435 | 46 | if (_rs == NULL) { |
duke@435 | 47 | GenRemSet* rs = SharedHeap::heap()->rem_set(); |
duke@435 | 48 | assert(rs->rs_kind() == GenRemSet::CardTable, "Wrong rem set kind"); |
duke@435 | 49 | _rs = (CardTableRS*)rs; |
duke@435 | 50 | } |
duke@435 | 51 | } |
duke@435 | 52 | |
coleenp@548 | 53 | template <class T> inline void OopsInGenClosure::do_barrier(T* p) { |
duke@435 | 54 | assert(generation()->is_in_reserved(p), "expected ref in generation"); |
ysr@1280 | 55 | T heap_oop = oopDesc::load_heap_oop(p); |
ysr@1280 | 56 | assert(!oopDesc::is_null(heap_oop), "expected non-null oop"); |
ysr@1280 | 57 | oop obj = oopDesc::decode_heap_oop_not_null(heap_oop); |
duke@435 | 58 | // If p points to a younger generation, mark the card. |
duke@435 | 59 | if ((HeapWord*)obj < _gen_boundary) { |
duke@435 | 60 | _rs->inline_write_ref_field_gc(p, obj); |
duke@435 | 61 | } |
duke@435 | 62 | } |
duke@435 | 63 | |
ysr@1280 | 64 | template <class T> inline void OopsInGenClosure::par_do_barrier(T* p) { |
ysr@777 | 65 | assert(generation()->is_in_reserved(p), "expected ref in generation"); |
ysr@1280 | 66 | T heap_oop = oopDesc::load_heap_oop(p); |
ysr@1280 | 67 | assert(!oopDesc::is_null(heap_oop), "expected non-null oop"); |
ysr@1280 | 68 | oop obj = oopDesc::decode_heap_oop_not_null(heap_oop); |
ysr@777 | 69 | // If p points to a younger generation, mark the card. |
ysr@777 | 70 | if ((HeapWord*)obj < gen_boundary()) { |
ysr@777 | 71 | rs()->write_ref_field_gc_par(p, obj); |
ysr@777 | 72 | } |
ysr@777 | 73 | } |
ysr@777 | 74 | |
coleenp@4037 | 75 | inline void OopsInKlassOrGenClosure::do_klass_barrier() { |
coleenp@4037 | 76 | assert(_scanned_klass != NULL, "Must be"); |
coleenp@4037 | 77 | _scanned_klass->record_modified_oops(); |
coleenp@4037 | 78 | } |
coleenp@4037 | 79 | |
duke@435 | 80 | // NOTE! Any changes made here should also be made |
coleenp@548 | 81 | // in FastScanClosure::do_oop_work() |
coleenp@548 | 82 | template <class T> inline void ScanClosure::do_oop_work(T* p) { |
coleenp@548 | 83 | T heap_oop = oopDesc::load_heap_oop(p); |
duke@435 | 84 | // Should we copy the obj? |
coleenp@548 | 85 | if (!oopDesc::is_null(heap_oop)) { |
coleenp@548 | 86 | oop obj = oopDesc::decode_heap_oop_not_null(heap_oop); |
duke@435 | 87 | if ((HeapWord*)obj < _boundary) { |
duke@435 | 88 | assert(!_g->to()->is_in_reserved(obj), "Scanning field twice?"); |
coleenp@548 | 89 | oop new_obj = obj->is_forwarded() ? obj->forwardee() |
coleenp@548 | 90 | : _g->copy_to_survivor_space(obj); |
coleenp@548 | 91 | oopDesc::encode_store_heap_oop_not_null(p, new_obj); |
duke@435 | 92 | } |
coleenp@4037 | 93 | |
coleenp@4037 | 94 | if (is_scanning_a_klass()) { |
coleenp@4037 | 95 | do_klass_barrier(); |
coleenp@4037 | 96 | } else if (_gc_barrier) { |
duke@435 | 97 | // Now call parent closure |
duke@435 | 98 | do_barrier(p); |
duke@435 | 99 | } |
duke@435 | 100 | } |
duke@435 | 101 | } |
duke@435 | 102 | |
coleenp@548 | 103 | inline void ScanClosure::do_oop_nv(oop* p) { ScanClosure::do_oop_work(p); } |
coleenp@548 | 104 | inline void ScanClosure::do_oop_nv(narrowOop* p) { ScanClosure::do_oop_work(p); } |
duke@435 | 105 | |
duke@435 | 106 | // NOTE! Any changes made here should also be made |
coleenp@548 | 107 | // in ScanClosure::do_oop_work() |
coleenp@548 | 108 | template <class T> inline void FastScanClosure::do_oop_work(T* p) { |
coleenp@548 | 109 | T heap_oop = oopDesc::load_heap_oop(p); |
duke@435 | 110 | // Should we copy the obj? |
coleenp@548 | 111 | if (!oopDesc::is_null(heap_oop)) { |
coleenp@548 | 112 | oop obj = oopDesc::decode_heap_oop_not_null(heap_oop); |
duke@435 | 113 | if ((HeapWord*)obj < _boundary) { |
duke@435 | 114 | assert(!_g->to()->is_in_reserved(obj), "Scanning field twice?"); |
coleenp@548 | 115 | oop new_obj = obj->is_forwarded() ? obj->forwardee() |
coleenp@548 | 116 | : _g->copy_to_survivor_space(obj); |
coleenp@548 | 117 | oopDesc::encode_store_heap_oop_not_null(p, new_obj); |
coleenp@4037 | 118 | if (is_scanning_a_klass()) { |
coleenp@4037 | 119 | do_klass_barrier(); |
coleenp@4037 | 120 | } else if (_gc_barrier) { |
duke@435 | 121 | // Now call parent closure |
duke@435 | 122 | do_barrier(p); |
duke@435 | 123 | } |
duke@435 | 124 | } |
duke@435 | 125 | } |
duke@435 | 126 | } |
duke@435 | 127 | |
coleenp@548 | 128 | inline void FastScanClosure::do_oop_nv(oop* p) { FastScanClosure::do_oop_work(p); } |
coleenp@548 | 129 | inline void FastScanClosure::do_oop_nv(narrowOop* p) { FastScanClosure::do_oop_work(p); } |
duke@435 | 130 | |
duke@435 | 131 | // Note similarity to ScanClosure; the difference is that |
duke@435 | 132 | // the barrier set is taken care of outside this closure. |
coleenp@548 | 133 | template <class T> inline void ScanWeakRefClosure::do_oop_work(T* p) { |
coleenp@548 | 134 | assert(!oopDesc::is_null(*p), "null weak reference?"); |
coleenp@548 | 135 | oop obj = oopDesc::load_decode_heap_oop_not_null(p); |
duke@435 | 136 | // weak references are sometimes scanned twice; must check |
duke@435 | 137 | // that to-space doesn't already contain this object |
duke@435 | 138 | if ((HeapWord*)obj < _boundary && !_g->to()->is_in_reserved(obj)) { |
coleenp@548 | 139 | oop new_obj = obj->is_forwarded() ? obj->forwardee() |
coleenp@548 | 140 | : _g->copy_to_survivor_space(obj); |
coleenp@548 | 141 | oopDesc::encode_store_heap_oop_not_null(p, new_obj); |
duke@435 | 142 | } |
duke@435 | 143 | } |
duke@435 | 144 | |
coleenp@548 | 145 | inline void ScanWeakRefClosure::do_oop_nv(oop* p) { ScanWeakRefClosure::do_oop_work(p); } |
coleenp@548 | 146 | inline void ScanWeakRefClosure::do_oop_nv(narrowOop* p) { ScanWeakRefClosure::do_oop_work(p); } |
stefank@2314 | 147 | |
stefank@2314 | 148 | #endif // SHARE_VM_MEMORY_GENOOPCLOSURES_INLINE_HPP |