Mercurial > hg > truffle
annotate src/share/vm/utilities/ostream.hpp @ 14714:b602356a9cfc
additional canonicalizers for accesses and value nodes (improves number of implicit null checks)
author | Lukas Stadler <lukas.stadler@oracle.com> |
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date | Thu, 20 Mar 2014 17:15:36 +0100 |
parents | de6a9e811145 |
children | 4ca6dc0799b6 f42c10a3d4b1 |
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 #ifndef SHARE_VM_UTILITIES_OSTREAM_HPP |
26 #define SHARE_VM_UTILITIES_OSTREAM_HPP | |
27 | |
28 #include "memory/allocation.hpp" | |
29 #include "runtime/timer.hpp" | |
30 | |
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31 DEBUG_ONLY(class ResourceMark;) |
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32 |
0 | 33 // Output streams for printing |
34 // | |
35 // Printing guidelines: | |
36 // Where possible, please use tty->print() and tty->print_cr(). | |
37 // For product mode VM warnings use warning() which internally uses tty. | |
38 // In places where tty is not initialized yet or too much overhead, | |
39 // we may use jio_printf: | |
40 // jio_fprintf(defaultStream::output_stream(), "Message"); | |
41 // This allows for redirection via -XX:+DisplayVMOutputToStdout and | |
42 // -XX:+DisplayVMOutputToStderr | |
43 class outputStream : public ResourceObj { | |
44 protected: | |
45 int _indentation; // current indentation | |
46 int _width; // width of the page | |
47 int _position; // position on the current line | |
48 int _newlines; // number of '\n' output so far | |
49 julong _precount; // number of chars output, less _position | |
50 TimeStamp _stamp; // for time stamps | |
51 | |
52 void update_position(const char* s, size_t len); | |
53 static const char* do_vsnprintf(char* buffer, size_t buflen, | |
54 const char* format, va_list ap, | |
55 bool add_cr, | |
56 size_t& result_len); | |
57 | |
58 public: | |
59 // creation | |
60 outputStream(int width = 80); | |
61 outputStream(int width, bool has_time_stamps); | |
62 | |
63 // indentation | |
6605 | 64 outputStream& indent(); |
0 | 65 void inc() { _indentation++; }; |
66 void dec() { _indentation--; }; | |
6605 | 67 void inc(int n) { _indentation += n; }; |
68 void dec(int n) { _indentation -= n; }; | |
0 | 69 int indentation() const { return _indentation; } |
70 void set_indentation(int i) { _indentation = i; } | |
71 void fill_to(int col); | |
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72 void move_to(int col, int slop = 6, int min_space = 2); |
0 | 73 |
74 // sizing | |
75 int width() const { return _width; } | |
76 int position() const { return _position; } | |
77 int newlines() const { return _newlines; } | |
78 julong count() const { return _precount + _position; } | |
79 void set_count(julong count) { _precount = count - _position; } | |
80 void set_position(int pos) { _position = pos; } | |
81 | |
82 // printing | |
83 void print(const char* format, ...); | |
84 void print_cr(const char* format, ...); | |
85 void vprint(const char *format, va_list argptr); | |
86 void vprint_cr(const char* format, va_list argptr); | |
87 void print_raw(const char* str) { write(str, strlen(str)); } | |
88 void print_raw(const char* str, int len) { write(str, len); } | |
89 void print_raw_cr(const char* str) { write(str, strlen(str)); cr(); } | |
90 void print_raw_cr(const char* str, int len){ write(str, len); cr(); } | |
6605 | 91 void print_data(void* data, size_t len, bool with_ascii); |
0 | 92 void put(char ch); |
100
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93 void sp(int count = 1); |
0 | 94 void cr(); |
95 void bol() { if (_position > 0) cr(); } | |
96 | |
97 // Time stamp | |
98 TimeStamp& time_stamp() { return _stamp; } | |
99 void stamp(); | |
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100 void stamp(bool guard, const char* prefix, const char* suffix); |
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101 void stamp(bool guard) { |
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102 stamp(guard, "", ": "); |
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103 } |
0 | 104 // Date stamp |
105 void date_stamp(bool guard, const char* prefix, const char* suffix); | |
106 // A simplified call that includes a suffix of ": " | |
107 void date_stamp(bool guard) { | |
108 date_stamp(guard, "", ": "); | |
109 } | |
110 | |
111 // portable printing of 64 bit integers | |
112 void print_jlong(jlong value); | |
113 void print_julong(julong value); | |
114 | |
115 // flushing | |
116 virtual void flush() {} | |
117 virtual void write(const char* str, size_t len) = 0; | |
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118 virtual void rotate_log() {} // GC log rotation |
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119 virtual ~outputStream() {} // close properly on deletion |
0 | 120 |
121 void dec_cr() { dec(); cr(); } | |
122 void inc_cr() { inc(); cr(); } | |
123 }; | |
124 | |
125 // standard output | |
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126 // ANSI C++ name collision |
0 | 127 extern outputStream* tty; // tty output |
128 extern outputStream* gclog_or_tty; // stream for gc log if -Xloggc:<f>, or tty | |
129 | |
6605 | 130 class streamIndentor : public StackObj { |
131 private: | |
132 outputStream* _str; | |
133 int _amount; | |
134 | |
135 public: | |
136 streamIndentor(outputStream* str, int amt = 2) : _str(str), _amount(amt) { | |
137 _str->inc(_amount); | |
138 } | |
139 ~streamIndentor() { _str->dec(_amount); } | |
140 }; | |
141 | |
142 | |
0 | 143 // advisory locking for the shared tty stream: |
144 class ttyLocker: StackObj { | |
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145 friend class ttyUnlocker; |
0 | 146 private: |
147 intx _holder; | |
148 | |
149 public: | |
150 static intx hold_tty(); // returns a "holder" token | |
151 static void release_tty(intx holder); // must witness same token | |
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152 static bool release_tty_if_locked(); // returns true if lock was released |
0 | 153 static void break_tty_lock_for_safepoint(intx holder); |
154 | |
155 ttyLocker() { _holder = hold_tty(); } | |
156 ~ttyLocker() { release_tty(_holder); } | |
157 }; | |
158 | |
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159 // Release the tty lock if it's held and reacquire it if it was |
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160 // locked. Used to avoid lock ordering problems. |
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161 class ttyUnlocker: StackObj { |
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162 private: |
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163 bool _was_locked; |
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164 public: |
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165 ttyUnlocker() { |
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166 _was_locked = ttyLocker::release_tty_if_locked(); |
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167 } |
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168 ~ttyUnlocker() { |
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169 if (_was_locked) { |
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170 ttyLocker::hold_tty(); |
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171 } |
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172 } |
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173 }; |
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174 |
0 | 175 // for writing to strings; buffer will expand automatically |
176 class stringStream : public outputStream { | |
177 protected: | |
178 char* buffer; | |
179 size_t buffer_pos; | |
180 size_t buffer_length; | |
181 bool buffer_fixed; | |
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182 DEBUG_ONLY(ResourceMark* rm;) |
0 | 183 public: |
184 stringStream(size_t initial_bufsize = 256); | |
185 stringStream(char* fixed_buffer, size_t fixed_buffer_size); | |
186 ~stringStream(); | |
187 virtual void write(const char* c, size_t len); | |
188 size_t size() { return buffer_pos; } | |
189 const char* base() { return buffer; } | |
190 void reset() { buffer_pos = 0; _precount = 0; _position = 0; } | |
191 char* as_string(); | |
192 }; | |
193 | |
194 class fileStream : public outputStream { | |
195 protected: | |
196 FILE* _file; | |
197 bool _need_close; | |
198 public: | |
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199 fileStream() { _file = NULL; _need_close = false; } |
0 | 200 fileStream(const char* file_name); |
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201 fileStream(const char* file_name, const char* opentype); |
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202 fileStream(FILE* file, bool need_close = false) { _file = file; _need_close = need_close; } |
0 | 203 ~fileStream(); |
204 bool is_open() const { return _file != NULL; } | |
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205 void set_need_close(bool b) { _need_close = b;} |
0 | 206 virtual void write(const char* c, size_t len); |
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207 size_t read(void *data, size_t size, size_t count) { return ::fread(data, size, count, _file); } |
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208 char* readln(char *data, int count); |
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209 int eof() { return feof(_file); } |
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210 long fileSize(); |
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211 void rewind() { ::rewind(_file); } |
0 | 212 void flush(); |
213 }; | |
214 | |
215 // unlike fileStream, fdStream does unbuffered I/O by calling | |
216 // open() and write() directly. It is async-safe, but output | |
217 // from multiple thread may be mixed together. Used by fatal | |
218 // error handler. | |
219 class fdStream : public outputStream { | |
220 protected: | |
221 int _fd; | |
222 bool _need_close; | |
223 public: | |
224 fdStream(const char* file_name); | |
225 fdStream(int fd = -1) { _fd = fd; _need_close = false; } | |
226 ~fdStream(); | |
227 bool is_open() const { return _fd != -1; } | |
228 void set_fd(int fd) { _fd = fd; _need_close = false; } | |
229 int fd() const { return _fd; } | |
230 virtual void write(const char* c, size_t len); | |
231 void flush() {}; | |
232 }; | |
233 | |
12215 | 234 class gcLogFileStream : public fileStream { |
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235 protected: |
12215 | 236 const char* _file_name; |
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237 jlong _bytes_written; |
12215 | 238 uintx _cur_file_num; // current logfile rotation number, from 0 to NumberOfGCLogFiles-1 |
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239 public: |
12215 | 240 gcLogFileStream(const char* file_name); |
241 ~gcLogFileStream(); | |
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242 virtual void write(const char* c, size_t len); |
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243 virtual void rotate_log(); |
12215 | 244 void dump_loggc_header(); |
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245 }; |
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246 |
12215 | 247 #ifndef PRODUCT |
248 // unit test for checking -Xloggc:<filename> parsing result | |
249 void test_loggc_filename(); | |
250 #endif | |
251 | |
0 | 252 void ostream_init(); |
253 void ostream_init_log(); | |
254 void ostream_exit(); | |
255 void ostream_abort(); | |
256 | |
257 // staticBufferStream uses a user-supplied buffer for all formatting. | |
258 // Used for safe formatting during fatal error handling. Not MT safe. | |
259 // Do not share the stream between multiple threads. | |
260 class staticBufferStream : public outputStream { | |
261 private: | |
262 char* _buffer; | |
263 size_t _buflen; | |
264 outputStream* _outer_stream; | |
265 public: | |
266 staticBufferStream(char* buffer, size_t buflen, | |
267 outputStream *outer_stream); | |
268 ~staticBufferStream() {}; | |
269 virtual void write(const char* c, size_t len); | |
270 void flush(); | |
271 void print(const char* format, ...); | |
272 void print_cr(const char* format, ...); | |
273 void vprint(const char *format, va_list argptr); | |
274 void vprint_cr(const char* format, va_list argptr); | |
275 }; | |
276 | |
277 // In the non-fixed buffer case an underlying buffer will be created and | |
278 // managed in C heap. Not MT-safe. | |
279 class bufferedStream : public outputStream { | |
280 protected: | |
281 char* buffer; | |
282 size_t buffer_pos; | |
222 | 283 size_t buffer_max; |
0 | 284 size_t buffer_length; |
285 bool buffer_fixed; | |
286 public: | |
222 | 287 bufferedStream(size_t initial_bufsize = 256, size_t bufmax = 1024*1024*10); |
288 bufferedStream(char* fixed_buffer, size_t fixed_buffer_size, size_t bufmax = 1024*1024*10); | |
0 | 289 ~bufferedStream(); |
290 virtual void write(const char* c, size_t len); | |
291 size_t size() { return buffer_pos; } | |
292 const char* base() { return buffer; } | |
293 void reset() { buffer_pos = 0; _precount = 0; _position = 0; } | |
294 char* as_string(); | |
295 }; | |
296 | |
297 #define O_BUFLEN 2000 // max size of output of individual print() methods | |
298 | |
299 #ifndef PRODUCT | |
300 | |
301 class networkStream : public bufferedStream { | |
302 | |
303 private: | |
304 int _socket; | |
305 | |
306 public: | |
307 networkStream(); | |
308 ~networkStream(); | |
309 | |
310 bool connect(const char *host, short port); | |
311 bool is_open() const { return _socket != -1; } | |
312 int read(char *buf, size_t len); | |
313 void close(); | |
314 virtual void flush(); | |
315 }; | |
316 | |
317 #endif | |
1972 | 318 |
319 #endif // SHARE_VM_UTILITIES_OSTREAM_HPP |