Mercurial > hg > graal-compiler
annotate src/share/vm/runtime/handles.cpp @ 4911:d903bf750e9f
7129514: time warp warnings after 7117303
Summary: Replace calls to os::javaTimeMillis() that are used to update the milliseconds since the last GC to an equivalent that uses a monotonically non-decreasing time source.
Reviewed-by: ysr, jmasa
author | johnc |
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date | Wed, 18 Jan 2012 09:50:16 -0800 |
parents | f08d439fab8c |
children | d2a62e0f25eb |
rev | line source |
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0 | 1 /* |
1972 | 2 * Copyright (c) 1997, 2010, 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 * | |
1552
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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" | |
27 #include "oops/oop.inline.hpp" | |
28 #include "runtime/handles.inline.hpp" | |
29 #ifdef TARGET_OS_FAMILY_linux | |
30 # include "os_linux.inline.hpp" | |
31 # include "thread_linux.inline.hpp" | |
32 #endif | |
33 #ifdef TARGET_OS_FAMILY_solaris | |
34 # include "os_solaris.inline.hpp" | |
35 # include "thread_solaris.inline.hpp" | |
36 #endif | |
37 #ifdef TARGET_OS_FAMILY_windows | |
38 # include "os_windows.inline.hpp" | |
39 # include "thread_windows.inline.hpp" | |
40 #endif | |
3960 | 41 #ifdef TARGET_OS_FAMILY_bsd |
42 # include "os_bsd.inline.hpp" | |
43 # include "thread_bsd.inline.hpp" | |
44 #endif | |
0 | 45 |
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"); | |
50 assert(SharedSkipVerify || obj->is_oop(), "sanity check"); | |
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) { | |
73 // assert((*bottom)->is_oop(), "handle should point to oop"); | |
74 assert(Universe::heap()->is_in(*bottom), "handle should be valid heap address"); | |
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; | |
114 NOT_PRODUCT(_size_in_bytes = _area->_size_in_bytes;) | |
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 } | |
151 } | |
152 #endif | |
153 | |
154 // Delete later chunks | |
155 if( _chunk->next() ) { | |
156 _chunk->next_chop(); | |
157 } | |
158 // Roll back arena to saved top markers | |
159 area->_chunk = _chunk; | |
160 area->_hwm = _hwm; | |
161 area->_max = _max; | |
162 NOT_PRODUCT(area->set_size_in_bytes(_size_in_bytes);) | |
163 #ifdef ASSERT | |
164 // clear out first chunk (to detect allocation bugs) | |
165 if (ZapVMHandleArea) { | |
166 memset(_hwm, badHandleValue, _max - _hwm); | |
167 } | |
168 Atomic::dec(&_nof_handlemarks); | |
169 #endif | |
170 | |
171 // Unlink this from the thread | |
172 _thread->set_last_handle_mark(previous_handle_mark()); | |
173 } | |
174 | |
175 #ifdef ASSERT | |
176 | |
177 NoHandleMark::NoHandleMark() { | |
178 HandleArea* area = Thread::current()->handle_area(); | |
179 area->_no_handle_mark_nesting++; | |
180 assert(area->_no_handle_mark_nesting > 0, "must stack allocate NoHandleMark" ); | |
181 } | |
182 | |
183 | |
184 NoHandleMark::~NoHandleMark() { | |
185 HandleArea* area = Thread::current()->handle_area(); | |
186 assert(area->_no_handle_mark_nesting > 0, "must stack allocate NoHandleMark" ); | |
187 area->_no_handle_mark_nesting--; | |
188 } | |
189 | |
190 | |
191 ResetNoHandleMark::ResetNoHandleMark() { | |
192 HandleArea* area = Thread::current()->handle_area(); | |
193 _no_handle_mark_nesting = area->_no_handle_mark_nesting; | |
194 area->_no_handle_mark_nesting = 0; | |
195 } | |
196 | |
197 | |
198 ResetNoHandleMark::~ResetNoHandleMark() { | |
199 HandleArea* area = Thread::current()->handle_area(); | |
200 area->_no_handle_mark_nesting = _no_handle_mark_nesting; | |
201 } | |
202 | |
203 #endif |