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
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