1 /* 2 * Copyright (c) 2018, 2019, 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/zBarrierSetNMethod.hpp" 28 #include "gc/z/zGlobals.hpp" 29 #include "gc/z/zHeap.inline.hpp" 30 #include "gc/z/zThreadLocalData.hpp" 31 #include "runtime/thread.hpp" 32 #include "utilities/macros.hpp" 33 #ifdef COMPILER1 34 #include "gc/z/c1/zBarrierSetC1.hpp" 35 #endif 36 #ifdef COMPILER2 37 #include "gc/z/c2/zBarrierSetC2.hpp" 38 #endif 39 40 class ZBarrierSetC1; 41 class ZBarrierSetC2; 42 43 static BarrierSetNMethod* make_barrier_set_nmethod() { 44 // NMethod barriers are only used when class unloading is enabled 45 if (!ClassUnloading) { 46 return NULL; 47 } 48 49 return new ZBarrierSetNMethod(); 50 } 51 52 ZBarrierSet::ZBarrierSet() : 53 BarrierSet(make_barrier_set_assembler<ZBarrierSetAssembler>(), 54 make_barrier_set_c1<ZBarrierSetC1>(), 55 make_barrier_set_c2<ZBarrierSetC2>(), 56 make_barrier_set_nmethod(), 57 BarrierSet::FakeRtti(BarrierSet::ZBarrierSet)) {} 58 59 ZBarrierSetAssembler* ZBarrierSet::assembler() { 60 BarrierSetAssembler* const bsa = BarrierSet::barrier_set()->barrier_set_assembler(); 61 return reinterpret_cast<ZBarrierSetAssembler*>(bsa); 62 } 63 64 bool ZBarrierSet::barrier_needed(DecoratorSet decorators, BasicType type) { 65 assert((decorators & AS_RAW) == 0, "Unexpected decorator"); 66 assert((decorators & AS_NO_KEEPALIVE) == 0, "Unexpected decorator"); 67 //assert((decorators & ON_UNKNOWN_OOP_REF) == 0, "Unexpected decorator"); 68 69 if (is_reference_type(type)) { 70 assert((decorators & (IN_HEAP | IN_NATIVE)) != 0, "Where is reference?"); 71 // Barrier needed even when IN_NATIVE, to allow concurrent scanning. 72 return true; 73 } 74 75 // Barrier not needed 76 return false; 77 } 78 79 void ZBarrierSet::on_thread_create(Thread* thread) { 80 // Create thread local data 81 ZThreadLocalData::create(thread); 82 } 83 84 void ZBarrierSet::on_thread_destroy(Thread* thread) { 85 // Destroy thread local data 86 ZThreadLocalData::destroy(thread); 87 } 88 89 void ZBarrierSet::on_thread_attach(Thread* thread) { 90 // Set thread local address bad mask 91 ZThreadLocalData::set_address_bad_mask(thread, ZAddressBadMask); 92 } 93 94 void ZBarrierSet::on_thread_detach(Thread* thread) { 95 // Flush and free any remaining mark stacks 96 ZHeap::heap()->mark_flush_and_free(thread); 97 }