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
36inline 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) \
47inline 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
51DEF_HANDLE_CONSTR(instance , is_instance_noinline )
52DEF_HANDLE_CONSTR(array , is_array_noinline )
53DEF_HANDLE_CONSTR(objArray , is_objArray_noinline )
54DEF_HANDLE_CONSTR(typeArray, is_typeArray_noinline)
55
56// Constructor for metadata handles
57#define DEF_METADATA_HANDLE_FN(name, type) \
58inline 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} \
66inline 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
75DEF_METADATA_HANDLE_FN(method, Method)
76DEF_METADATA_HANDLE_FN(constantPool, ConstantPool)
77
78inline HandleMark::HandleMark() {
79 initialize(Thread::current());
80}
81
82inline 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
89inline 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
104inline HandleMarkCleaner::HandleMarkCleaner(Thread* thread) {
105 _thread = thread;
106 _thread->last_handle_mark()->push();
107}
108
109inline HandleMarkCleaner::~HandleMarkCleaner() {
110 _thread->last_handle_mark()->pop_and_restore();
111}
112
113#endif // SHARE_RUNTIME_HANDLES_INLINE_HPP
114