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/c1/zBarrierSetC1.hpp"
  26 #include "gc/z/c2/zBarrierSetC2.hpp"
  27 #include "gc/z/zBarrierSet.hpp"
  28 #include "gc/z/zBarrierSetAssembler.hpp"
  29 #include "gc/z/zGlobals.hpp"
  30 #include "gc/z/zHeap.inline.hpp"
  31 #include "gc/z/zThreadLocalData.hpp"
  32 #include "runtime/thread.hpp"
  33 
  34 ZBarrierSet::ZBarrierSet() :
  35     BarrierSet(make_barrier_set_assembler<ZBarrierSetAssembler>(),
  36                make_barrier_set_c1<ZBarrierSetC1>(),
  37                make_barrier_set_c2<ZBarrierSetC2>(),
  38                BarrierSet::FakeRtti(BarrierSet::ZBarrierSet)) {}
  39 
  40 ZBarrierSetAssembler* ZBarrierSet::assembler() {
  41   BarrierSetAssembler* const bsa = BarrierSet::barrier_set()->barrier_set_assembler();
  42   return reinterpret_cast<ZBarrierSetAssembler*>(bsa);
  43 }
  44 
  45 bool ZBarrierSet::barrier_needed(DecoratorSet decorators, BasicType type) {
  46   assert((decorators & AS_RAW) == 0, "Unexpected decorator");
  47   assert((decorators & AS_NO_KEEPALIVE) == 0, "Unexpected decorator");
  48   assert((decorators & IN_ARCHIVE_ROOT) == 0, "Unexpected decorator");
  49   //assert((decorators & ON_UNKNOWN_OOP_REF) == 0, "Unexpected decorator");
  50 
  51   if (type == T_OBJECT || type == T_ARRAY) {
  52     if (((decorators & IN_HEAP) != 0) ||
  53         ((decorators & IN_CONCURRENT_ROOT) != 0) ||
  54         ((decorators & ON_PHANTOM_OOP_REF) != 0)) {
  55       // Barrier needed
  56       return true;
  57     }
  58   }
  59 
  60   // Barrier not neeed
  61   return false;
  62 }
  63 
  64 void ZBarrierSet::on_thread_create(Thread* thread) {
  65   // Create thread local data
  66   ZThreadLocalData::create(thread);
  67 }
  68 
  69 void ZBarrierSet::on_thread_destroy(Thread* thread) {
  70   // Destroy thread local data
  71   ZThreadLocalData::destroy(thread);
  72 }
  73 
  74 void ZBarrierSet::on_thread_attach(JavaThread* thread) {
  75   // Set thread local address bad mask
  76   ZThreadLocalData::set_address_bad_mask(thread, ZAddressBadMask);
  77 }
  78 
  79 void ZBarrierSet::on_thread_detach(JavaThread* thread) {
  80   // Flush and free any remaining mark stacks
  81   ZHeap::heap()->mark_flush_and_free(thread);
  82 }