Mercurial > hg > graal-jvmci-8
annotate src/share/vm/memory/sharedHeap.cpp @ 22909:38d6febe66af
8075210: Refactor strong root processing in order to allow G1 to evolve separately from GenCollectedHeap
Summary: Create a G1RootProcessor and move SharedHeap root processing to GenCollectedHeap
Reviewed-by: brutisso, tschatzl, ehelin
author | mgerdin |
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date | Mon, 01 Dec 2014 15:24:56 +0100 |
parents | f3aeae1f9fc5 |
children | dd9cc155639c |
rev | line source |
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0 | 1 /* |
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2 * Copyright (c) 2000, 2014, 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 "classfile/symbolTable.hpp" | |
27 #include "classfile/systemDictionary.hpp" | |
28 #include "code/codeCache.hpp" | |
29 #include "gc_interface/collectedHeap.inline.hpp" | |
30 #include "memory/sharedHeap.hpp" | |
31 #include "oops/oop.inline.hpp" | |
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32 #include "runtime/atomic.inline.hpp" |
1972 | 33 #include "runtime/fprofiler.hpp" |
34 #include "runtime/java.hpp" | |
35 #include "utilities/copy.hpp" | |
36 #include "utilities/workgroup.hpp" | |
0 | 37 |
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38 PRAGMA_FORMAT_MUTE_WARNINGS_FOR_GCC |
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39 |
0 | 40 SharedHeap* SharedHeap::_sh; |
41 | |
42 SharedHeap::SharedHeap(CollectorPolicy* policy_) : | |
43 CollectedHeap(), | |
44 _collector_policy(policy_), | |
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45 _rem_set(NULL), |
0 | 46 _strong_roots_parity(0), |
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47 _workers(NULL) |
0 | 48 { |
49 _sh = this; // ch is static, should be set only once. | |
50 if ((UseParNewGC || | |
11975 | 51 (UseConcMarkSweepGC && (CMSParallelInitialMarkEnabled || |
52 CMSParallelRemarkEnabled)) || | |
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53 UseG1GC) && |
0 | 54 ParallelGCThreads > 0) { |
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55 _workers = new FlexibleWorkGang("Parallel GC Threads", ParallelGCThreads, |
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56 /* are_GC_task_threads */true, |
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57 /* are_ConcurrentGC_threads */false); |
0 | 58 if (_workers == NULL) { |
59 vm_exit_during_initialization("Failed necessary allocation."); | |
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60 } else { |
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61 _workers->initialize_workers(); |
0 | 62 } |
63 } | |
64 } | |
65 | |
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66 bool SharedHeap::heap_lock_held_for_gc() { |
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67 Thread* t = Thread::current(); |
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68 return Heap_lock->owned_by_self() |
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69 || ( (t->is_GC_task_thread() || t->is_VM_thread()) |
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70 && _thread_holds_heap_lock_for_gc); |
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71 } |
0 | 72 |
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73 void SharedHeap::set_par_threads(uint t) { |
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74 assert(t == 0 || !UseSerialGC, "Cannot have parallel threads"); |
0 | 75 _n_par_threads = t; |
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76 } |
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77 |
0 | 78 void SharedHeap::change_strong_roots_parity() { |
79 // Also set the new collection parity. | |
80 assert(_strong_roots_parity >= 0 && _strong_roots_parity <= 2, | |
81 "Not in range."); | |
82 _strong_roots_parity++; | |
83 if (_strong_roots_parity == 3) _strong_roots_parity = 1; | |
84 assert(_strong_roots_parity >= 1 && _strong_roots_parity <= 2, | |
85 "Not in range."); | |
86 } | |
87 | |
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88 SharedHeap::StrongRootsScope::StrongRootsScope(SharedHeap* heap, bool activate) |
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89 : MarkScope(activate), _sh(heap) |
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90 { |
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91 if (_active) { |
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92 _sh->change_strong_roots_parity(); |
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93 // Zero the claimed high water mark in the StringTable |
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94 StringTable::clear_parallel_claimed_index(); |
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95 } |
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96 } |
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97 |
0 | 98 void SharedHeap::set_barrier_set(BarrierSet* bs) { |
99 _barrier_set = bs; | |
100 // Cached barrier set for fast access in oops | |
101 oopDesc::set_bs(bs); | |
102 } | |
103 | |
104 void SharedHeap::post_initialize() { | |
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105 CollectedHeap::post_initialize(); |
0 | 106 ref_processing_init(); |
107 } | |
108 | |
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109 void SharedHeap::ref_processing_init() {} |
0 | 110 |
111 // Some utilities. | |
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112 void SharedHeap::print_size_transition(outputStream* out, |
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113 size_t bytes_before, |
0 | 114 size_t bytes_after, |
115 size_t capacity) { | |
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116 out->print(" %d%s->%d%s(%d%s)", |
0 | 117 byte_size_in_proper_unit(bytes_before), |
118 proper_unit_for_byte_size(bytes_before), | |
119 byte_size_in_proper_unit(bytes_after), | |
120 proper_unit_for_byte_size(bytes_after), | |
121 byte_size_in_proper_unit(capacity), | |
122 proper_unit_for_byte_size(capacity)); | |
123 } |