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annotate src/share/vm/runtime/handles.inline.hpp @ 6725:da91efe96a93

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6964458: Reimplement class meta-data storage to use native memory Summary: Remove PermGen, allocate meta-data in metaspace linked to class loaders, rewrite GC walking, rewrite and rename metadata to be C++ classes Reviewed-by: jmasa, stefank, never, coleenp, kvn, brutisso, mgerdin, dholmes, jrose, twisti, roland Contributed-by: jmasa <jon.masamitsu@oracle.com>, stefank <stefan.karlsson@oracle.com>, mgerdin <mikael.gerdin@oracle.com>, never <tom.rodriguez@oracle.com>
author coleenp
date Sat, 01 Sep 2012 13:25:18 -0400
parents d2a62e0f25eb
children 716c64bda5ba
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1 /*
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2 * Copyright (c) 1998, 2012, Oracle and/or its affiliates. All rights reserved.
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3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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4 *
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5 * This code is free software; you can redistribute it and/or modify it
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6 * under the terms of the GNU General Public License version 2 only, as
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7 * published by the Free Software Foundation.
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8 *
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9 * This code is distributed in the hope that it will be useful, but WITHOUT
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10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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12 * version 2 for more details (a copy is included in the LICENSE file that
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13 * accompanied this code).
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14 *
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15 * You should have received a copy of the GNU General Public License version
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16 * 2 along with this work; if not, write to the Free Software Foundation,
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17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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18 *
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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20 * or visit www.oracle.com if you need additional information or have any
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21 * questions.
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22 *
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23 */
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24
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25 #ifndef SHARE_VM_RUNTIME_HANDLES_INLINE_HPP
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26 #define SHARE_VM_RUNTIME_HANDLES_INLINE_HPP
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27
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28 #include "runtime/handles.hpp"
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29 #ifdef TARGET_OS_FAMILY_linux
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30 # include "thread_linux.inline.hpp"
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31 #endif
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32 #ifdef TARGET_OS_FAMILY_solaris
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33 # include "thread_solaris.inline.hpp"
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34 #endif
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35 #ifdef TARGET_OS_FAMILY_windows
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36 # include "thread_windows.inline.hpp"
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37 #endif
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38 #ifdef TARGET_OS_FAMILY_bsd
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39 # include "thread_bsd.inline.hpp"
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40 #endif
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41
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42 // these inline functions are in a separate file to break an include cycle
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43 // between Thread and Handle
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44
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45 inline Handle::Handle(oop obj) {
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46 if (obj == NULL) {
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47 _handle = NULL;
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48 } else {
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49 _handle = Thread::current()->handle_area()->allocate_handle(obj);
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50 }
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51 }
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52
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53
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54 #ifndef ASSERT
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55 inline Handle::Handle(Thread* thread, oop obj) {
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56 assert(thread == Thread::current(), "sanity check");
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57 if (obj == NULL) {
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58 _handle = NULL;
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59 } else {
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60 _handle = thread->handle_area()->allocate_handle(obj);
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61 }
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62 }
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63 #endif // ASSERT
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64
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65 // Constructors for metadata handles
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66 #define DEF_METADATA_HANDLE_FN(name, type) \
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67 inline name##Handle::name##Handle(type* obj) : _value(obj), _thread(NULL) { \
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68 if (obj != NULL) { \
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69 assert(((Metadata*)obj)->is_valid(), "obj is valid"); \
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70 _thread = Thread::current(); \
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71 assert (_thread->is_in_stack((address)this), "not on stack?"); \
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72 _thread->metadata_handles()->push((Metadata*)obj); \
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73 } \
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74 } \
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75 inline name##Handle::name##Handle(Thread* thread, type* obj) : _value(obj), _thread(thread) { \
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76 if (obj != NULL) { \
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77 assert(((Metadata*)obj)->is_valid(), "obj is valid"); \
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78 assert(_thread == Thread::current(), "thread must be current"); \
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79 assert (_thread->is_in_stack((address)this), "not on stack?"); \
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80 _thread->metadata_handles()->push((Metadata*)obj); \
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81 } \
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82 } \
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83 inline name##Handle::name##Handle(const name##Handle &h) { \
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84 _value = h._value; \
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85 if (_value != NULL) { \
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86 assert(_value->is_valid(), "obj is valid"); \
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87 if (h._thread != NULL) { \
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88 assert(h._thread == Thread::current(), "thread must be current");\
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89 _thread = h._thread; \
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90 } else { \
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91 _thread = Thread::current(); \
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92 } \
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93 _thread->metadata_handles()->push((Metadata*)_value); \
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94 } \
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95 } \
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96 inline name##Handle& name##Handle::operator=(const name##Handle &s) { \
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97 remove(); \
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98 _value = s._value; \
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99 if (_value != NULL) { \
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100 assert(_value->is_valid(), "obj is valid"); \
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101 if (s._thread != NULL) { \
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102 assert(s._thread == Thread::current(), "thread must be current");\
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103 _thread = s._thread; \
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104 } else { \
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105 _thread = Thread::current(); \
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106 } \
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107 _thread->metadata_handles()->push((Metadata*)_value); \
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108 } \
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109 return *this; \
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110 } \
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111 inline void name##Handle::remove() { \
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112 if (_value != NULL) { \
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113 int i = _thread->metadata_handles()->find_from_end((Metadata*)_value); \
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114 assert(i!=-1, "not in metadata_handles list"); \
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115 _thread->metadata_handles()->remove_at(i); \
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116 } \
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117 } \
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118 inline name##Handle::~name##Handle () { remove(); } \
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119
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120 DEF_METADATA_HANDLE_FN(method, Method)
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121 DEF_METADATA_HANDLE_FN(constantPool, ConstantPool)
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122
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123 inline HandleMark::HandleMark() {
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124 initialize(Thread::current());
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125 }
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126
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127
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128 inline void HandleMark::push() {
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129 // This is intentionally a NOP. pop_and_restore will reset
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130 // values to the HandleMark further down the stack, typically
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131 // in JavaCalls::call_helper.
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132 debug_only(_area->_handle_mark_nesting++);
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133 }
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134
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135 inline void HandleMark::pop_and_restore() {
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136 HandleArea* area = _area; // help compilers with poor alias analysis
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137 // Delete later chunks
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138 if( _chunk->next() ) {
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139 _chunk->next_chop();
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140 }
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141 // Roll back arena to saved top markers
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142 area->_chunk = _chunk;
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143 area->_hwm = _hwm;
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144 area->_max = _max;
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145 area->set_size_in_bytes(_size_in_bytes);
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146 debug_only(area->_handle_mark_nesting--);
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147 }
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148
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149 #endif // SHARE_VM_RUNTIME_HANDLES_INLINE_HPP