Mercurial > hg > truffle
annotate src/share/vm/runtime/handles.cpp @ 13722:2d4a8d3d286b
Sweeper: make sure we only run the sweeper on java threads
author | Gilles Duboscq <duboscq@ssw.jku.at> |
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date | Tue, 21 Jan 2014 18:35:03 +0100 |
parents | bd3237e0e18d |
children | 78bbf4d43a14 |
rev | line source |
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0 | 1 /* |
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2 * Copyright (c) 1997, 2013, 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 |
44 #ifdef ASSERT | |
45 oop* HandleArea::allocate_handle(oop obj) { | |
46 assert(_handle_mark_nesting > 1, "memory leak: allocating handle outside HandleMark"); | |
47 assert(_no_handle_mark_nesting == 0, "allocating handle inside NoHandleMark"); | |
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48 assert(obj->is_oop(), err_msg("not an oop: " INTPTR_FORMAT, (intptr_t*) obj)); |
0 | 49 return real_allocate_handle(obj); |
50 } | |
51 | |
52 Handle::Handle(Thread* thread, oop obj) { | |
53 assert(thread == Thread::current(), "sanity check"); | |
54 if (obj == NULL) { | |
55 _handle = NULL; | |
56 } else { | |
57 _handle = thread->handle_area()->allocate_handle(obj); | |
58 } | |
59 } | |
60 | |
61 #endif | |
62 | |
63 static uintx chunk_oops_do(OopClosure* f, Chunk* chunk, char* chunk_top) { | |
64 oop* bottom = (oop*) chunk->bottom(); | |
65 oop* top = (oop*) chunk_top; | |
66 uintx handles_visited = top - bottom; | |
67 assert(top >= bottom && top <= (oop*) chunk->top(), "just checking"); | |
68 // during GC phase 3, a handle may be a forward pointer that | |
69 // is not yet valid, so loosen the assertion | |
70 while (bottom < top) { | |
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71 // This test can be moved up but for now check every oop. |
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72 |
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73 assert((*bottom)->is_oop(), "handle should point to oop"); |
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74 |
0 | 75 f->do_oop(bottom++); |
76 } | |
77 return handles_visited; | |
78 } | |
79 | |
80 // Used for debugging handle allocation. | |
81 NOT_PRODUCT(jint _nof_handlemarks = 0;) | |
82 | |
83 void HandleArea::oops_do(OopClosure* f) { | |
84 uintx handles_visited = 0; | |
85 // First handle the current chunk. It is filled to the high water mark. | |
86 handles_visited += chunk_oops_do(f, _chunk, _hwm); | |
87 // Then handle all previous chunks. They are completely filled. | |
88 Chunk* k = _first; | |
89 while(k != _chunk) { | |
90 handles_visited += chunk_oops_do(f, k, k->top()); | |
91 k = k->next(); | |
92 } | |
93 | |
94 // The thread local handle areas should not get very large | |
95 if (TraceHandleAllocation && handles_visited > TotalHandleAllocationLimit) { | |
96 #ifdef ASSERT | |
97 warning("%d: Visited in HandleMark : %d", | |
98 _nof_handlemarks, handles_visited); | |
99 #else | |
100 warning("Visited in HandleMark : %d", handles_visited); | |
101 #endif | |
102 } | |
103 if (_prev != NULL) _prev->oops_do(f); | |
104 } | |
105 | |
106 void HandleMark::initialize(Thread* thread) { | |
107 _thread = thread; | |
108 // Save area | |
109 _area = thread->handle_area(); | |
110 // Save current top | |
111 _chunk = _area->_chunk; | |
112 _hwm = _area->_hwm; | |
113 _max = _area->_max; | |
6197 | 114 _size_in_bytes = _area->_size_in_bytes; |
0 | 115 debug_only(_area->_handle_mark_nesting++); |
116 assert(_area->_handle_mark_nesting > 0, "must stack allocate HandleMarks"); | |
117 debug_only(Atomic::inc(&_nof_handlemarks);) | |
118 | |
119 // Link this in the thread | |
120 set_previous_handle_mark(thread->last_handle_mark()); | |
121 thread->set_last_handle_mark(this); | |
122 } | |
123 | |
124 | |
125 HandleMark::~HandleMark() { | |
126 HandleArea* area = _area; // help compilers with poor alias analysis | |
127 assert(area == _thread->handle_area(), "sanity check"); | |
128 assert(area->_handle_mark_nesting > 0, "must stack allocate HandleMarks" ); | |
129 debug_only(area->_handle_mark_nesting--); | |
130 | |
131 // Debug code to trace the number of handles allocated per mark/ | |
132 #ifdef ASSERT | |
133 if (TraceHandleAllocation) { | |
134 size_t handles = 0; | |
135 Chunk *c = _chunk->next(); | |
136 if (c == NULL) { | |
137 handles = area->_hwm - _hwm; // no new chunk allocated | |
138 } else { | |
139 handles = _max - _hwm; // add rest in first chunk | |
140 while(c != NULL) { | |
141 handles += c->length(); | |
142 c = c->next(); | |
143 } | |
144 handles -= area->_max - area->_hwm; // adjust for last trunk not full | |
145 } | |
146 handles /= sizeof(void *); // Adjust for size of a handle | |
147 if (handles > HandleAllocationLimit) { | |
148 // Note: _nof_handlemarks is only set in debug mode | |
149 warning("%d: Allocated in HandleMark : %d", _nof_handlemarks, handles); | |
150 } | |
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151 |
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152 tty->print_cr("Handles %d", handles); |
0 | 153 } |
154 #endif | |
155 | |
156 // Delete later chunks | |
157 if( _chunk->next() ) { | |
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158 // reset arena size before delete chunks. Otherwise, the total |
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159 // arena size could exceed total chunk size |
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160 assert(area->size_in_bytes() > size_in_bytes(), "Sanity check"); |
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161 area->set_size_in_bytes(size_in_bytes()); |
0 | 162 _chunk->next_chop(); |
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163 } else { |
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164 assert(area->size_in_bytes() == size_in_bytes(), "Sanity check"); |
0 | 165 } |
166 // Roll back arena to saved top markers | |
167 area->_chunk = _chunk; | |
168 area->_hwm = _hwm; | |
169 area->_max = _max; | |
170 #ifdef ASSERT | |
171 // clear out first chunk (to detect allocation bugs) | |
172 if (ZapVMHandleArea) { | |
173 memset(_hwm, badHandleValue, _max - _hwm); | |
174 } | |
175 Atomic::dec(&_nof_handlemarks); | |
176 #endif | |
177 | |
178 // Unlink this from the thread | |
179 _thread->set_last_handle_mark(previous_handle_mark()); | |
180 } | |
181 | |
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182 void* HandleMark::operator new(size_t size) throw() { |
10271 | 183 return AllocateHeap(size, mtThread); |
184 } | |
185 | |
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186 void* HandleMark::operator new [] (size_t size) throw() { |
10271 | 187 return AllocateHeap(size, mtThread); |
188 } | |
189 | |
190 void HandleMark::operator delete(void* p) { | |
191 FreeHeap(p, mtThread); | |
192 } | |
193 | |
194 void HandleMark::operator delete[](void* p) { | |
195 FreeHeap(p, mtThread); | |
196 } | |
197 | |
0 | 198 #ifdef ASSERT |
199 | |
200 NoHandleMark::NoHandleMark() { | |
201 HandleArea* area = Thread::current()->handle_area(); | |
202 area->_no_handle_mark_nesting++; | |
203 assert(area->_no_handle_mark_nesting > 0, "must stack allocate NoHandleMark" ); | |
204 } | |
205 | |
206 | |
207 NoHandleMark::~NoHandleMark() { | |
208 HandleArea* area = Thread::current()->handle_area(); | |
209 assert(area->_no_handle_mark_nesting > 0, "must stack allocate NoHandleMark" ); | |
210 area->_no_handle_mark_nesting--; | |
211 } | |
212 | |
213 | |
214 ResetNoHandleMark::ResetNoHandleMark() { | |
215 HandleArea* area = Thread::current()->handle_area(); | |
216 _no_handle_mark_nesting = area->_no_handle_mark_nesting; | |
217 area->_no_handle_mark_nesting = 0; | |
218 } | |
219 | |
220 | |
221 ResetNoHandleMark::~ResetNoHandleMark() { | |
222 HandleArea* area = Thread::current()->handle_area(); | |
223 area->_no_handle_mark_nesting = _no_handle_mark_nesting; | |
224 } | |
225 | |
226 #endif |