Mercurial > hg > truffle
annotate src/share/vm/runtime/handles.cpp @ 18454:5af19da6fae5
DelayedFrameMapBuilder: remove TrackedVirtualStackSlot.
author | Josef Eisl <josef.eisl@jku.at> |
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date | Mon, 17 Nov 2014 19:34:08 +0100 |
parents | 78bbf4d43a14 |
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rev | line source |
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0 | 1 /* |
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2 * Copyright (c) 1997, 2014, Oracle and/or its affiliates. All rights reserved. |
0 | 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 * | |
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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. |
0 | 22 * |
23 */ | |
24 | |
1972 | 25 #include "precompiled.hpp" |
26 #include "memory/allocation.inline.hpp" | |
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27 #include "oops/constantPool.hpp" |
1972 | 28 #include "oops/oop.inline.hpp" |
29 #include "runtime/handles.inline.hpp" | |
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30 #include "runtime/thread.inline.hpp" |
1972 | 31 #ifdef TARGET_OS_FAMILY_linux |
32 # include "os_linux.inline.hpp" | |
33 #endif | |
34 #ifdef TARGET_OS_FAMILY_solaris | |
35 # include "os_solaris.inline.hpp" | |
36 #endif | |
37 #ifdef TARGET_OS_FAMILY_windows | |
38 # include "os_windows.inline.hpp" | |
39 #endif | |
3960 | 40 #ifdef TARGET_OS_FAMILY_bsd |
41 # include "os_bsd.inline.hpp" | |
42 #endif | |
0 | 43 |
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44 PRAGMA_FORMAT_MUTE_WARNINGS_FOR_GCC |
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45 |
0 | 46 #ifdef ASSERT |
47 oop* HandleArea::allocate_handle(oop obj) { | |
48 assert(_handle_mark_nesting > 1, "memory leak: allocating handle outside HandleMark"); | |
49 assert(_no_handle_mark_nesting == 0, "allocating handle inside NoHandleMark"); | |
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50 assert(obj->is_oop(), err_msg("not an oop: " INTPTR_FORMAT, (intptr_t*) obj)); |
0 | 51 return real_allocate_handle(obj); |
52 } | |
53 | |
54 Handle::Handle(Thread* thread, oop obj) { | |
55 assert(thread == Thread::current(), "sanity check"); | |
56 if (obj == NULL) { | |
57 _handle = NULL; | |
58 } else { | |
59 _handle = thread->handle_area()->allocate_handle(obj); | |
60 } | |
61 } | |
62 | |
63 #endif | |
64 | |
65 static uintx chunk_oops_do(OopClosure* f, Chunk* chunk, char* chunk_top) { | |
66 oop* bottom = (oop*) chunk->bottom(); | |
67 oop* top = (oop*) chunk_top; | |
68 uintx handles_visited = top - bottom; | |
69 assert(top >= bottom && top <= (oop*) chunk->top(), "just checking"); | |
70 // during GC phase 3, a handle may be a forward pointer that | |
71 // is not yet valid, so loosen the assertion | |
72 while (bottom < top) { | |
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73 // This test can be moved up but for now check every oop. |
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74 |
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75 assert((*bottom)->is_oop(), "handle should point to oop"); |
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76 |
0 | 77 f->do_oop(bottom++); |
78 } | |
79 return handles_visited; | |
80 } | |
81 | |
82 // Used for debugging handle allocation. | |
83 NOT_PRODUCT(jint _nof_handlemarks = 0;) | |
84 | |
85 void HandleArea::oops_do(OopClosure* f) { | |
86 uintx handles_visited = 0; | |
87 // First handle the current chunk. It is filled to the high water mark. | |
88 handles_visited += chunk_oops_do(f, _chunk, _hwm); | |
89 // Then handle all previous chunks. They are completely filled. | |
90 Chunk* k = _first; | |
91 while(k != _chunk) { | |
92 handles_visited += chunk_oops_do(f, k, k->top()); | |
93 k = k->next(); | |
94 } | |
95 | |
96 // The thread local handle areas should not get very large | |
97 if (TraceHandleAllocation && handles_visited > TotalHandleAllocationLimit) { | |
98 #ifdef ASSERT | |
99 warning("%d: Visited in HandleMark : %d", | |
100 _nof_handlemarks, handles_visited); | |
101 #else | |
102 warning("Visited in HandleMark : %d", handles_visited); | |
103 #endif | |
104 } | |
105 if (_prev != NULL) _prev->oops_do(f); | |
106 } | |
107 | |
108 void HandleMark::initialize(Thread* thread) { | |
109 _thread = thread; | |
110 // Save area | |
111 _area = thread->handle_area(); | |
112 // Save current top | |
113 _chunk = _area->_chunk; | |
114 _hwm = _area->_hwm; | |
115 _max = _area->_max; | |
6197 | 116 _size_in_bytes = _area->_size_in_bytes; |
0 | 117 debug_only(_area->_handle_mark_nesting++); |
118 assert(_area->_handle_mark_nesting > 0, "must stack allocate HandleMarks"); | |
119 debug_only(Atomic::inc(&_nof_handlemarks);) | |
120 | |
121 // Link this in the thread | |
122 set_previous_handle_mark(thread->last_handle_mark()); | |
123 thread->set_last_handle_mark(this); | |
124 } | |
125 | |
126 | |
127 HandleMark::~HandleMark() { | |
128 HandleArea* area = _area; // help compilers with poor alias analysis | |
129 assert(area == _thread->handle_area(), "sanity check"); | |
130 assert(area->_handle_mark_nesting > 0, "must stack allocate HandleMarks" ); | |
131 debug_only(area->_handle_mark_nesting--); | |
132 | |
133 // Debug code to trace the number of handles allocated per mark/ | |
134 #ifdef ASSERT | |
135 if (TraceHandleAllocation) { | |
136 size_t handles = 0; | |
137 Chunk *c = _chunk->next(); | |
138 if (c == NULL) { | |
139 handles = area->_hwm - _hwm; // no new chunk allocated | |
140 } else { | |
141 handles = _max - _hwm; // add rest in first chunk | |
142 while(c != NULL) { | |
143 handles += c->length(); | |
144 c = c->next(); | |
145 } | |
146 handles -= area->_max - area->_hwm; // adjust for last trunk not full | |
147 } | |
148 handles /= sizeof(void *); // Adjust for size of a handle | |
149 if (handles > HandleAllocationLimit) { | |
150 // Note: _nof_handlemarks is only set in debug mode | |
151 warning("%d: Allocated in HandleMark : %d", _nof_handlemarks, handles); | |
152 } | |
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153 |
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154 tty->print_cr("Handles %d", handles); |
0 | 155 } |
156 #endif | |
157 | |
158 // Delete later chunks | |
159 if( _chunk->next() ) { | |
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160 // reset arena size before delete chunks. Otherwise, the total |
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161 // arena size could exceed total chunk size |
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162 assert(area->size_in_bytes() > size_in_bytes(), "Sanity check"); |
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163 area->set_size_in_bytes(size_in_bytes()); |
0 | 164 _chunk->next_chop(); |
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165 } else { |
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166 assert(area->size_in_bytes() == size_in_bytes(), "Sanity check"); |
0 | 167 } |
168 // Roll back arena to saved top markers | |
169 area->_chunk = _chunk; | |
170 area->_hwm = _hwm; | |
171 area->_max = _max; | |
172 #ifdef ASSERT | |
173 // clear out first chunk (to detect allocation bugs) | |
174 if (ZapVMHandleArea) { | |
175 memset(_hwm, badHandleValue, _max - _hwm); | |
176 } | |
177 Atomic::dec(&_nof_handlemarks); | |
178 #endif | |
179 | |
180 // Unlink this from the thread | |
181 _thread->set_last_handle_mark(previous_handle_mark()); | |
182 } | |
183 | |
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184 void* HandleMark::operator new(size_t size) throw() { |
10271 | 185 return AllocateHeap(size, mtThread); |
186 } | |
187 | |
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188 void* HandleMark::operator new [] (size_t size) throw() { |
10271 | 189 return AllocateHeap(size, mtThread); |
190 } | |
191 | |
192 void HandleMark::operator delete(void* p) { | |
193 FreeHeap(p, mtThread); | |
194 } | |
195 | |
196 void HandleMark::operator delete[](void* p) { | |
197 FreeHeap(p, mtThread); | |
198 } | |
199 | |
0 | 200 #ifdef ASSERT |
201 | |
202 NoHandleMark::NoHandleMark() { | |
203 HandleArea* area = Thread::current()->handle_area(); | |
204 area->_no_handle_mark_nesting++; | |
205 assert(area->_no_handle_mark_nesting > 0, "must stack allocate NoHandleMark" ); | |
206 } | |
207 | |
208 | |
209 NoHandleMark::~NoHandleMark() { | |
210 HandleArea* area = Thread::current()->handle_area(); | |
211 assert(area->_no_handle_mark_nesting > 0, "must stack allocate NoHandleMark" ); | |
212 area->_no_handle_mark_nesting--; | |
213 } | |
214 | |
215 | |
216 ResetNoHandleMark::ResetNoHandleMark() { | |
217 HandleArea* area = Thread::current()->handle_area(); | |
218 _no_handle_mark_nesting = area->_no_handle_mark_nesting; | |
219 area->_no_handle_mark_nesting = 0; | |
220 } | |
221 | |
222 | |
223 ResetNoHandleMark::~ResetNoHandleMark() { | |
224 HandleArea* area = Thread::current()->handle_area(); | |
225 area->_no_handle_mark_nesting = _no_handle_mark_nesting; | |
226 } | |
227 | |
228 #endif |