Mercurial > hg > truffle
annotate src/share/vm/utilities/events.cpp @ 1721:413ad0331a0c
6977924: Changes for 6975078 produce build error with certain gcc versions
Summary: The changes introduced for 6975078 assign badHeapOopVal to the _allocation field in the ResourceObj class. In 32 bit linux builds with certain versions of gcc this assignment will be flagged as an error while compiling allocation.cpp. In 32 bit builds the constant value badHeapOopVal (which is cast to an intptr_t) is negative. The _allocation field is typed as an unsigned intptr_t and gcc catches this as an error.
Reviewed-by: jcoomes, ysr, phh
author | johnc |
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date | Wed, 18 Aug 2010 10:59:06 -0700 |
parents | c18cbe5936b8 |
children | f95d63e2154a |
rev | line source |
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0 | 1 /* |
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2 * Copyright (c) 1997, 2006, 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 |
c18cbe5936b8
6941466: Oracle rebranding changes for Hotspot repositories
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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 | |
25 #include "incls/_precompiled.incl" | |
26 #include "incls/_events.cpp.incl" | |
27 | |
28 | |
29 #ifndef PRODUCT | |
30 | |
31 //////////////////////////////////////////////////////////////////////////// | |
32 // Event | |
33 | |
34 typedef u4 EventID; | |
35 | |
36 class Event VALUE_OBJ_CLASS_SPEC { | |
37 private: | |
38 jlong _time_tick; | |
39 intx _thread_id; | |
40 const char* _format; | |
41 int _indent; | |
42 intptr_t _arg_1; | |
43 intptr_t _arg_2; | |
44 intptr_t _arg_3; | |
45 | |
46 // only EventBuffer::add_event() can assign event id | |
47 friend class EventBuffer; | |
48 EventID _id; | |
49 | |
50 public: | |
51 | |
52 void clear() { _format = NULL; } | |
53 | |
54 EventID id() const { return _id; } | |
55 | |
56 void fill(int indent, const char* format, intptr_t arg_1, intptr_t arg_2, intptr_t arg_3) { | |
57 _format = format; | |
58 _arg_1 = arg_1; | |
59 _arg_2 = arg_2; | |
60 _arg_3 = arg_3; | |
61 | |
62 _indent = indent; | |
63 | |
64 _thread_id = os::current_thread_id(); | |
65 _time_tick = os::elapsed_counter(); | |
66 } | |
67 | |
68 void print_on(outputStream *st) { | |
69 if (_format == NULL) return; | |
70 st->print(" %d", _thread_id); | |
71 st->print(" %3.2g ", (double)_time_tick / os::elapsed_frequency()); | |
72 st->fill_to(20); | |
73 for (int index = 0; index < _indent; index++) { | |
74 st->print("| "); | |
75 } | |
76 st->print_cr(_format, _arg_1, _arg_2, _arg_3); | |
77 } | |
78 }; | |
79 | |
80 //////////////////////////////////////////////////////////////////////////// | |
81 // EventBuffer | |
82 // | |
83 // Simple lock-free event queue. Every event has a unique 32-bit id. | |
84 // It's fine if two threads add events at the same time, because they | |
85 // will get different event id, and then write to different buffer location. | |
86 // However, it is assumed that add_event() is quick enough (or buffer size | |
87 // is big enough), so when one thread is adding event, there can't be more | |
88 // than "size" events created by other threads; otherwise we'll end up having | |
89 // two threads writing to the same location. | |
90 | |
91 class EventBuffer : AllStatic { | |
92 private: | |
93 static Event* buffer; | |
94 static int size; | |
95 static jint indent; | |
96 static volatile EventID _current_event_id; | |
97 | |
98 static EventID get_next_event_id() { | |
99 return (EventID)Atomic::add(1, (jint*)&_current_event_id); | |
100 } | |
101 | |
102 public: | |
103 static void inc_indent() { Atomic::inc(&indent); } | |
104 static void dec_indent() { Atomic::dec(&indent); } | |
105 | |
106 static bool get_event(EventID id, Event* event) { | |
107 int index = (int)(id % size); | |
108 if (buffer[index].id() == id) { | |
109 memcpy(event, &buffer[index], sizeof(Event)); | |
110 // check id again; if buffer[index] is being updated by another thread, | |
111 // event->id() will contain different value. | |
112 return (event->id() == id); | |
113 } else { | |
114 // id does not match - id is invalid, or event is overwritten | |
115 return false; | |
116 } | |
117 } | |
118 | |
119 // add a new event to the queue; if EventBuffer is full, this call will | |
120 // overwrite the oldest event in the queue | |
121 static EventID add_event(const char* format, | |
122 intptr_t arg_1, intptr_t arg_2, intptr_t arg_3) { | |
123 // assign a unique id | |
124 EventID id = get_next_event_id(); | |
125 | |
126 // event will be copied to buffer[index] | |
127 int index = (int)(id % size); | |
128 | |
129 // first, invalidate id, buffer[index] can't have event with id = index + 2 | |
130 buffer[index]._id = index + 2; | |
131 | |
132 // make sure everyone has seen that buffer[index] is invalid | |
133 OrderAccess::fence(); | |
134 | |
135 // ... before updating its value | |
136 buffer[index].fill(indent, format, arg_1, arg_2, arg_3); | |
137 | |
138 // finally, set up real event id, now buffer[index] contains valid event | |
139 OrderAccess::release_store(&(buffer[index]._id), id); | |
140 | |
141 return id; | |
142 } | |
143 | |
144 static void print_last(outputStream *st, int number) { | |
145 st->print_cr("[Last %d events in the event buffer]", number); | |
146 st->print_cr("-<thd>-<elapsed sec>-<description>---------------------"); | |
147 | |
148 int count = 0; | |
149 EventID id = _current_event_id; | |
150 while (count < number) { | |
151 Event event; | |
152 if (get_event(id, &event)) { | |
153 event.print_on(st); | |
154 } | |
155 id--; | |
156 count++; | |
157 } | |
158 } | |
159 | |
160 static void print_all(outputStream* st) { | |
161 print_last(st, size); | |
162 } | |
163 | |
164 static void init() { | |
165 // Allocate the event buffer | |
166 size = EventLogLength; | |
167 buffer = NEW_C_HEAP_ARRAY(Event, size); | |
168 | |
169 _current_event_id = 0; | |
170 | |
171 // Clear the event buffer | |
172 for (int index = 0; index < size; index++) { | |
173 buffer[index]._id = index + 1; // index + 1 is invalid id | |
174 buffer[index].clear(); | |
175 } | |
176 } | |
177 }; | |
178 | |
179 Event* EventBuffer::buffer; | |
180 int EventBuffer::size; | |
181 volatile EventID EventBuffer::_current_event_id; | |
182 int EventBuffer::indent; | |
183 | |
184 //////////////////////////////////////////////////////////////////////////// | |
185 // Events | |
186 | |
187 // Events::log() is safe for signal handlers | |
188 void Events::log(const char* format, ...) { | |
189 if (LogEvents) { | |
190 va_list ap; | |
191 va_start(ap, format); | |
192 intptr_t arg_1 = va_arg(ap, intptr_t); | |
193 intptr_t arg_2 = va_arg(ap, intptr_t); | |
194 intptr_t arg_3 = va_arg(ap, intptr_t); | |
195 va_end(ap); | |
196 | |
197 EventBuffer::add_event(format, arg_1, arg_2, arg_3); | |
198 } | |
199 } | |
200 | |
201 void Events::print_all(outputStream *st) { | |
202 EventBuffer::print_all(st); | |
203 } | |
204 | |
205 void Events::print_last(outputStream *st, int number) { | |
206 EventBuffer::print_last(st, number); | |
207 } | |
208 | |
209 /////////////////////////////////////////////////////////////////////////// | |
210 // EventMark | |
211 | |
212 EventMark::EventMark(const char* format, ...) { | |
213 if (LogEvents) { | |
214 va_list ap; | |
215 va_start(ap, format); | |
216 intptr_t arg_1 = va_arg(ap, intptr_t); | |
217 intptr_t arg_2 = va_arg(ap, intptr_t); | |
218 intptr_t arg_3 = va_arg(ap, intptr_t); | |
219 va_end(ap); | |
220 | |
221 EventBuffer::add_event(format, arg_1, arg_2, arg_3); | |
222 EventBuffer::inc_indent(); | |
223 } | |
224 } | |
225 | |
226 EventMark::~EventMark() { | |
227 if (LogEvents) { | |
228 EventBuffer::dec_indent(); | |
229 EventBuffer::add_event("done", 0, 0, 0); | |
230 } | |
231 } | |
232 | |
233 /////////////////////////////////////////////////////////////////////////// | |
234 | |
235 void eventlog_init() { | |
236 EventBuffer::init(); | |
237 } | |
238 | |
239 int print_all_events(outputStream *st) { | |
240 EventBuffer::print_all(st); | |
241 return 1; | |
242 } | |
243 | |
244 #else | |
245 | |
246 void eventlog_init() {} | |
247 int print_all_events(outputStream *st) { return 0; } | |
248 | |
249 #endif // PRODUCT |