1 /*
2 * Copyright (c) 2018, Oracle and/or its affiliates. All rights reserved.
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 Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 */
23
24 #include "precompiled.hpp"
25 #include "gc/z/zBarrierSet.hpp"
26 #include "gc/z/zBarrierSetAssembler.hpp"
27 #include "gc/z/zGlobals.hpp"
28 #include "gc/z/zHeap.inline.hpp"
29 #include "gc/z/zThreadLocalData.hpp"
30 #include "runtime/thread.hpp"
31 #ifdef COMPILER1
32 #include "gc/z/c1/zBarrierSetC1.hpp"
33 #endif
34 #ifdef COMPILER2
35 #include "gc/z/c2/zBarrierSetC2.hpp"
36 #endif
37
38 class ZBarrierSetC1;
39 class ZBarrierSetC2;
40
ZBarrierSet()41 ZBarrierSet::ZBarrierSet() :
42 BarrierSet(make_barrier_set_assembler<ZBarrierSetAssembler>(),
43 COMPILER1_PRESENT( make_barrier_set_c1<ZBarrierSetC1>() ) NOT_COMPILER1(NULL),
44 COMPILER2_PRESENT( make_barrier_set_c2<ZBarrierSetC2>() ) NOT_COMPILER2(NULL),
45 BarrierSet::FakeRtti(BarrierSet::ZBarrierSet)) {}
46
assembler()47 ZBarrierSetAssembler* ZBarrierSet::assembler() {
48 BarrierSetAssembler* const bsa = BarrierSet::barrier_set()->barrier_set_assembler();
49 return reinterpret_cast<ZBarrierSetAssembler*>(bsa);
50 }
51
barrier_needed(DecoratorSet decorators,BasicType type)52 bool ZBarrierSet::barrier_needed(DecoratorSet decorators, BasicType type) {
53 assert((decorators & AS_RAW) == 0, "Unexpected decorator");
54 assert((decorators & AS_NO_KEEPALIVE) == 0, "Unexpected decorator");
55 //assert((decorators & ON_UNKNOWN_OOP_REF) == 0, "Unexpected decorator");
56
57 if (type == T_OBJECT || type == T_ARRAY) {
58 assert((decorators & (IN_HEAP | IN_NATIVE)) != 0, "Where is reference?");
59 // Barrier needed even when IN_NATIVE, to allow concurrent scanning.
60 return true;
61 }
62
63 // Barrier not needed
64 return false;
65 }
66
on_thread_create(Thread * thread)67 void ZBarrierSet::on_thread_create(Thread* thread) {
68 // Create thread local data
69 ZThreadLocalData::create(thread);
70 }
71
on_thread_destroy(Thread * thread)72 void ZBarrierSet::on_thread_destroy(Thread* thread) {
73 // Destroy thread local data
74 ZThreadLocalData::destroy(thread);
75 }
76
on_thread_attach(JavaThread * thread)77 void ZBarrierSet::on_thread_attach(JavaThread* thread) {
78 // Set thread local address bad mask
79 ZThreadLocalData::set_address_bad_mask(thread, ZAddressBadMask);
80 }
81
on_thread_detach(JavaThread * thread)82 void ZBarrierSet::on_thread_detach(JavaThread* thread) {
83 // Flush and free any remaining mark stacks
84 ZHeap::heap()->mark_flush_and_free(thread);
85 }
86