1 /* 2 * Copyright (c) 1998, 2017, 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_VM_RUNTIME_HANDLES_INLINE_HPP 26 #define SHARE_VM_RUNTIME_HANDLES_INLINE_HPP 27 28 #include "runtime/handles.hpp" 29 #include "runtime/thread.inline.hpp" 30 31 // these inline functions are in a separate file to break an include cycle 32 // between Thread and Handle 33 34 inline Handle::Handle(Thread* thread, oop obj) { 35 assert(thread == Thread::current(), "sanity check"); 36 if (obj == NULL) { 37 _handle = NULL; 38 } else { 39 _handle = thread->handle_area()->allocate_handle(obj); 40 } 41 } 42 43 // Constructor for metadata handles 44 #define DEF_METADATA_HANDLE_FN(name, type) \ 45 inline name##Handle::name##Handle(type* obj) : _value(obj), _thread(NULL) { \ 46 if (obj != NULL) { \ 47 assert(((Metadata*)obj)->is_valid(), "obj is valid"); \ 48 _thread = Thread::current(); \ 49 assert (_thread->is_in_stack((address)this), "not on stack?"); \ 50 _thread->metadata_handles()->push((Metadata*)obj); \ 51 } \ 52 } \ 53 inline name##Handle::name##Handle(Thread* thread, type* obj) : _value(obj), _thread(thread) { \ 54 if (obj != NULL) { \ 55 assert(((Metadata*)obj)->is_valid(), "obj is valid"); \ 56 assert(_thread == Thread::current(), "thread must be current"); \ 57 assert (_thread->is_in_stack((address)this), "not on stack?"); \ 58 _thread->metadata_handles()->push((Metadata*)obj); \ 59 } \ 60 } \ 61 62 DEF_METADATA_HANDLE_FN(method, Method) 63 DEF_METADATA_HANDLE_FN(constantPool, ConstantPool) 64 65 inline HandleMark::HandleMark() { 66 initialize(Thread::current()); 67 } 68 69 70 inline void HandleMark::push() { 71 // This is intentionally a NOP. pop_and_restore will reset 72 // values to the HandleMark further down the stack, typically 73 // in JavaCalls::call_helper. 74 debug_only(_area->_handle_mark_nesting++); 75 } 76 77 inline void HandleMark::pop_and_restore() { 78 HandleArea* area = _area; // help compilers with poor alias analysis 79 // Delete later chunks 80 if( _chunk->next() ) { 81 // reset arena size before delete chunks. Otherwise, the total 82 // arena size could exceed total chunk size 83 assert(area->size_in_bytes() > size_in_bytes(), "Sanity check"); 84 area->set_size_in_bytes(size_in_bytes()); 85 _chunk->next_chop(); 86 } else { 87 assert(area->size_in_bytes() == size_in_bytes(), "Sanity check"); 88 } 89 // Roll back arena to saved top markers 90 area->_chunk = _chunk; 91 area->_hwm = _hwm; 92 area->_max = _max; 93 debug_only(area->_handle_mark_nesting--); 94 } 95 96 #endif // SHARE_VM_RUNTIME_HANDLES_INLINE_HPP