1 /* 2 * Copyright (c) 1998, 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 25 #ifndef SHARE_RUNTIME_HANDLES_INLINE_HPP 26 #define SHARE_RUNTIME_HANDLES_INLINE_HPP 27 28 #include "runtime/handles.hpp" 29 #include "runtime/thread.hpp" 30 #include "oops/metadata.hpp" 31 #include "oops/oop.hpp" 32 33 // these inline functions are in a separate file to break an include cycle 34 // between Thread and Handle 35 36 inline Handle::Handle(Thread* thread, oop obj) { 37 assert(thread == Thread::current(), "sanity check"); 38 if (obj == NULL) { 39 _handle = NULL; 40 } else { 41 _handle = thread->handle_area()->allocate_handle(obj); 42 } 43 } 44 45 // Inline constructors for Specific Handles for different oop types 46 #define DEF_HANDLE_CONSTR(type, is_a) \ 47 inline type##Handle::type##Handle (Thread* thread, type##Oop obj) : Handle(thread, (oop)obj) { \ 48 assert(is_null() || ((oop)obj)->is_a(), "illegal type"); \ 49 } 50 51 DEF_HANDLE_CONSTR(instance , is_instance_noinline ) 52 DEF_HANDLE_CONSTR(array , is_array_noinline ) 53 DEF_HANDLE_CONSTR(objArray , is_objArray_noinline ) 54 DEF_HANDLE_CONSTR(typeArray, is_typeArray_noinline) 55 56 // Constructor for metadata handles 57 #define DEF_METADATA_HANDLE_FN(name, type) \ 58 inline name##Handle::name##Handle(type* obj) : _value(obj), _thread(NULL) { \ 59 if (obj != NULL) { \ 60 assert(((Metadata*)obj)->is_valid(), "obj is valid"); \ 61 _thread = Thread::current(); \ 62 assert (_thread->is_in_stack((address)this), "not on stack?"); \ 63 _thread->metadata_handles()->push((Metadata*)obj); \ 64 } \ 65 } \ 66 inline name##Handle::name##Handle(Thread* thread, type* obj) : _value(obj), _thread(thread) { \ 67 if (obj != NULL) { \ 68 assert(((Metadata*)obj)->is_valid(), "obj is valid"); \ 69 assert(_thread == Thread::current(), "thread must be current"); \ 70 assert (_thread->is_in_stack((address)this), "not on stack?"); \ 71 _thread->metadata_handles()->push((Metadata*)obj); \ 72 } \ 73 } \ 74 75 DEF_METADATA_HANDLE_FN(method, Method) 76 DEF_METADATA_HANDLE_FN(constantPool, ConstantPool) 77 78 inline HandleMark::HandleMark() { 79 initialize(Thread::current()); 80 } 81 82 inline void HandleMark::push() { 83 // This is intentionally a NOP. pop_and_restore will reset 84 // values to the HandleMark further down the stack, typically 85 // in JavaCalls::call_helper. 86 debug_only(_area->_handle_mark_nesting++); 87 } 88 89 inline void HandleMark::pop_and_restore() { 90 // Delete later chunks 91 if(_chunk->next() != NULL) { 92 assert(_area->size_in_bytes() > size_in_bytes(), "Sanity check"); 93 chop_later_chunks(); 94 } else { 95 assert(_area->size_in_bytes() == size_in_bytes(), "Sanity check"); 96 } 97 // Roll back arena to saved top markers 98 _area->_chunk = _chunk; 99 _area->_hwm = _hwm; 100 _area->_max = _max; 101 debug_only(_area->_handle_mark_nesting--); 102 } 103 104 inline HandleMarkCleaner::HandleMarkCleaner(Thread* thread) { 105 _thread = thread; 106 _thread->last_handle_mark()->push(); 107 } 108 109 inline HandleMarkCleaner::~HandleMarkCleaner() { 110 _thread->last_handle_mark()->pop_and_restore(); 111 } 112 113 #endif // SHARE_RUNTIME_HANDLES_INLINE_HPP