1 /* 2 * Copyright (c) 2022, 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 25 #ifndef SHARE_RUNTIME_LOCKSTACK_HPP 26 #define SHARE_RUNTIME_LOCKSTACK_HPP 27 28 #include "oops/oopsHierarchy.hpp" 29 #include "utilities/globalDefinitions.hpp" 30 #include "utilities/sizes.hpp" 31 32 class Thread; 33 class OopClosure; 34 35 class LockStack { 36 friend class VMStructs; 37 private: 38 static const size_t INITIAL_CAPACITY = 1; 39 oop* _base; 40 oop* _limit; 41 oop* _current; 42 43 void grow(); 44 void grow(size_t min_capacity); 45 void grow(oop* required_limit); 46 47 void validate(const char* msg) const PRODUCT_RETURN; 48 public: 49 static ByteSize current_offset() { return byte_offset_of(LockStack, _current); } 50 static ByteSize base_offset() { return byte_offset_of(LockStack, _base); } 51 static ByteSize limit_offset() { return byte_offset_of(LockStack, _limit); } 52 53 static void ensure_lock_stack_size(oop* _required_limit); 54 55 LockStack(); 56 ~LockStack(); 57 58 inline void push(oop o); 59 inline oop pop(); 60 inline void remove(oop o); 61 62 inline bool contains(oop o) const; 63 64 // GC support 65 inline void oops_do(OopClosure* cl); 66 67 }; 68 69 #endif // SHARE_RUNTIME_LOCKSTACK_HPP