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 #ifndef SHARE_GC_Z_ZTHREADLOCALDATA_HPP
  25 #define SHARE_GC_Z_ZTHREADLOCALDATA_HPP
  26 
  27 #include "gc/z/zMarkStack.hpp"
  28 #include "runtime/thread.hpp"
  29 #include "utilities/debug.hpp"
  30 #include "utilities/sizes.hpp"
  31 
  32 class ZThreadLocalData {
  33 private:
  34   uintptr_t              _address_bad_mask;
  35   ZMarkThreadLocalStacks _stacks;
  36 
  37   ZThreadLocalData() :
  38       _address_bad_mask(0),
  39       _stacks() {}
  40 
  41   static ZThreadLocalData* data(Thread* thread) {
  42     return thread->gc_data<ZThreadLocalData>();
  43   }
  44 
  45 public:
  46   static void create(Thread* thread) {
  47     new (data(thread)) ZThreadLocalData();
  48   }
  49 
  50   static void destroy(Thread* thread) {
  51     data(thread)->~ZThreadLocalData();
  52   }
  53 
  54   static void set_address_bad_mask(Thread* thread, uintptr_t mask) {
  55     data(thread)->_address_bad_mask = mask;
  56   }
  57 
  58   static ZMarkThreadLocalStacks* stacks(Thread* thread) {
  59     return &data(thread)->_stacks;
  60   }
  61 
  62   static ByteSize address_bad_mask_offset() {
  63     return Thread::gc_data_offset() + byte_offset_of(ZThreadLocalData, _address_bad_mask);
  64   }
  65 };
  66 
  67 #endif // SHARE_GC_Z_ZTHREADLOCALDATA_HPP