Mercurial > hg > graal-compiler
annotate src/share/vm/utilities/ostream.hpp @ 1711:a6bff45449bc
6973570: OrderAccess::storestore() scales poorly on multi-socket x64 and sparc: cache-line ping-ponging
Summary: volatile store to static variable removed in favour of a volatile store to stack to avoid excessive cache coherency traffic; verified that the volatile store is not elided by any of our current compilers.
Reviewed-by: dholmes, dice, jcoomes, kvn
author | ysr |
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date | Tue, 10 Aug 2010 14:53:35 -0700 |
parents | c18cbe5936b8 |
children | f95d63e2154a |
rev | line source |
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0 | 1 /* |
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2 * Copyright (c) 1997, 2008, 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 | |
25 // Output streams for printing | |
26 // | |
27 // Printing guidelines: | |
28 // Where possible, please use tty->print() and tty->print_cr(). | |
29 // For product mode VM warnings use warning() which internally uses tty. | |
30 // In places where tty is not initialized yet or too much overhead, | |
31 // we may use jio_printf: | |
32 // jio_fprintf(defaultStream::output_stream(), "Message"); | |
33 // This allows for redirection via -XX:+DisplayVMOutputToStdout and | |
34 // -XX:+DisplayVMOutputToStderr | |
35 class outputStream : public ResourceObj { | |
36 protected: | |
37 int _indentation; // current indentation | |
38 int _width; // width of the page | |
39 int _position; // position on the current line | |
40 int _newlines; // number of '\n' output so far | |
41 julong _precount; // number of chars output, less _position | |
42 TimeStamp _stamp; // for time stamps | |
43 | |
44 void update_position(const char* s, size_t len); | |
45 static const char* do_vsnprintf(char* buffer, size_t buflen, | |
46 const char* format, va_list ap, | |
47 bool add_cr, | |
48 size_t& result_len); | |
49 | |
50 public: | |
51 // creation | |
52 outputStream(int width = 80); | |
53 outputStream(int width, bool has_time_stamps); | |
54 | |
55 // indentation | |
56 void indent(); | |
57 void inc() { _indentation++; }; | |
58 void dec() { _indentation--; }; | |
59 int indentation() const { return _indentation; } | |
60 void set_indentation(int i) { _indentation = i; } | |
61 void fill_to(int col); | |
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62 void move_to(int col, int slop = 6, int min_space = 2); |
0 | 63 |
64 // sizing | |
65 int width() const { return _width; } | |
66 int position() const { return _position; } | |
67 int newlines() const { return _newlines; } | |
68 julong count() const { return _precount + _position; } | |
69 void set_count(julong count) { _precount = count - _position; } | |
70 void set_position(int pos) { _position = pos; } | |
71 | |
72 // printing | |
73 void print(const char* format, ...); | |
74 void print_cr(const char* format, ...); | |
75 void vprint(const char *format, va_list argptr); | |
76 void vprint_cr(const char* format, va_list argptr); | |
77 void print_raw(const char* str) { write(str, strlen(str)); } | |
78 void print_raw(const char* str, int len) { write(str, len); } | |
79 void print_raw_cr(const char* str) { write(str, strlen(str)); cr(); } | |
80 void print_raw_cr(const char* str, int len){ write(str, len); cr(); } | |
81 void put(char ch); | |
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82 void sp(int count = 1); |
0 | 83 void cr(); |
84 void bol() { if (_position > 0) cr(); } | |
85 | |
86 // Time stamp | |
87 TimeStamp& time_stamp() { return _stamp; } | |
88 void stamp(); | |
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89 void stamp(bool guard, const char* prefix, const char* suffix); |
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90 void stamp(bool guard) { |
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91 stamp(guard, "", ": "); |
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92 } |
0 | 93 // Date stamp |
94 void date_stamp(bool guard, const char* prefix, const char* suffix); | |
95 // A simplified call that includes a suffix of ": " | |
96 void date_stamp(bool guard) { | |
97 date_stamp(guard, "", ": "); | |
98 } | |
99 | |
100 // portable printing of 64 bit integers | |
101 void print_jlong(jlong value); | |
102 void print_julong(julong value); | |
103 | |
104 // flushing | |
105 virtual void flush() {} | |
106 virtual void write(const char* str, size_t len) = 0; | |
107 virtual ~outputStream() {} // close properly on deletion | |
108 | |
109 void dec_cr() { dec(); cr(); } | |
110 void inc_cr() { inc(); cr(); } | |
111 }; | |
112 | |
113 // standard output | |
114 // ANSI C++ name collision | |
115 extern outputStream* tty; // tty output | |
116 extern outputStream* gclog_or_tty; // stream for gc log if -Xloggc:<f>, or tty | |
117 | |
118 // advisory locking for the shared tty stream: | |
119 class ttyLocker: StackObj { | |
120 private: | |
121 intx _holder; | |
122 | |
123 public: | |
124 static intx hold_tty(); // returns a "holder" token | |
125 static void release_tty(intx holder); // must witness same token | |
126 static void break_tty_lock_for_safepoint(intx holder); | |
127 | |
128 ttyLocker() { _holder = hold_tty(); } | |
129 ~ttyLocker() { release_tty(_holder); } | |
130 }; | |
131 | |
132 // for writing to strings; buffer will expand automatically | |
133 class stringStream : public outputStream { | |
134 protected: | |
135 char* buffer; | |
136 size_t buffer_pos; | |
137 size_t buffer_length; | |
138 bool buffer_fixed; | |
139 public: | |
140 stringStream(size_t initial_bufsize = 256); | |
141 stringStream(char* fixed_buffer, size_t fixed_buffer_size); | |
142 ~stringStream(); | |
143 virtual void write(const char* c, size_t len); | |
144 size_t size() { return buffer_pos; } | |
145 const char* base() { return buffer; } | |
146 void reset() { buffer_pos = 0; _precount = 0; _position = 0; } | |
147 char* as_string(); | |
148 }; | |
149 | |
150 class fileStream : public outputStream { | |
151 protected: | |
152 FILE* _file; | |
153 bool _need_close; | |
154 public: | |
155 fileStream(const char* file_name); | |
156 fileStream(FILE* file) { _file = file; _need_close = false; } | |
157 ~fileStream(); | |
158 bool is_open() const { return _file != NULL; } | |
159 virtual void write(const char* c, size_t len); | |
160 void flush(); | |
161 }; | |
162 | |
163 // unlike fileStream, fdStream does unbuffered I/O by calling | |
164 // open() and write() directly. It is async-safe, but output | |
165 // from multiple thread may be mixed together. Used by fatal | |
166 // error handler. | |
167 class fdStream : public outputStream { | |
168 protected: | |
169 int _fd; | |
170 bool _need_close; | |
171 public: | |
172 fdStream(const char* file_name); | |
173 fdStream(int fd = -1) { _fd = fd; _need_close = false; } | |
174 ~fdStream(); | |
175 bool is_open() const { return _fd != -1; } | |
176 void set_fd(int fd) { _fd = fd; _need_close = false; } | |
177 int fd() const { return _fd; } | |
178 virtual void write(const char* c, size_t len); | |
179 void flush() {}; | |
180 }; | |
181 | |
182 void ostream_init(); | |
183 void ostream_init_log(); | |
184 void ostream_exit(); | |
185 void ostream_abort(); | |
186 | |
187 // staticBufferStream uses a user-supplied buffer for all formatting. | |
188 // Used for safe formatting during fatal error handling. Not MT safe. | |
189 // Do not share the stream between multiple threads. | |
190 class staticBufferStream : public outputStream { | |
191 private: | |
192 char* _buffer; | |
193 size_t _buflen; | |
194 outputStream* _outer_stream; | |
195 public: | |
196 staticBufferStream(char* buffer, size_t buflen, | |
197 outputStream *outer_stream); | |
198 ~staticBufferStream() {}; | |
199 virtual void write(const char* c, size_t len); | |
200 void flush(); | |
201 void print(const char* format, ...); | |
202 void print_cr(const char* format, ...); | |
203 void vprint(const char *format, va_list argptr); | |
204 void vprint_cr(const char* format, va_list argptr); | |
205 }; | |
206 | |
207 // In the non-fixed buffer case an underlying buffer will be created and | |
208 // managed in C heap. Not MT-safe. | |
209 class bufferedStream : public outputStream { | |
210 protected: | |
211 char* buffer; | |
212 size_t buffer_pos; | |
222 | 213 size_t buffer_max; |
0 | 214 size_t buffer_length; |
215 bool buffer_fixed; | |
216 public: | |
222 | 217 bufferedStream(size_t initial_bufsize = 256, size_t bufmax = 1024*1024*10); |
218 bufferedStream(char* fixed_buffer, size_t fixed_buffer_size, size_t bufmax = 1024*1024*10); | |
0 | 219 ~bufferedStream(); |
220 virtual void write(const char* c, size_t len); | |
221 size_t size() { return buffer_pos; } | |
222 const char* base() { return buffer; } | |
223 void reset() { buffer_pos = 0; _precount = 0; _position = 0; } | |
224 char* as_string(); | |
225 }; | |
226 | |
227 #define O_BUFLEN 2000 // max size of output of individual print() methods | |
228 | |
229 #ifndef PRODUCT | |
230 | |
231 class networkStream : public bufferedStream { | |
232 | |
233 private: | |
234 int _socket; | |
235 | |
236 public: | |
237 networkStream(); | |
238 ~networkStream(); | |
239 | |
240 bool connect(const char *host, short port); | |
241 bool is_open() const { return _socket != -1; } | |
242 int read(char *buf, size_t len); | |
243 void close(); | |
244 virtual void flush(); | |
245 }; | |
246 | |
247 #endif |