Mercurial > hg > truffle
annotate src/share/vm/utilities/ostream.hpp @ 2236:de14f1eee390
6954420: 2/4 jps shows "process information unavailable" sometimes
Summary: Make sure the backing store file is flushed in create_sharedmem_resources() and get_user_name_slow() no longer checks the size of the backing store file.
Reviewed-by: briand, swamyv, acorn, poonam
author | dcubed |
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date | Tue, 15 Feb 2011 19:00:22 -0800 |
parents | d8a72fbc4be7 |
children | 5841dc1964f0 |
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 * | |
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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 | |
0 | 31 // Output streams for printing |
32 // | |
33 // Printing guidelines: | |
34 // Where possible, please use tty->print() and tty->print_cr(). | |
35 // For product mode VM warnings use warning() which internally uses tty. | |
36 // In places where tty is not initialized yet or too much overhead, | |
37 // we may use jio_printf: | |
38 // jio_fprintf(defaultStream::output_stream(), "Message"); | |
39 // This allows for redirection via -XX:+DisplayVMOutputToStdout and | |
40 // -XX:+DisplayVMOutputToStderr | |
41 class outputStream : public ResourceObj { | |
42 protected: | |
43 int _indentation; // current indentation | |
44 int _width; // width of the page | |
45 int _position; // position on the current line | |
46 int _newlines; // number of '\n' output so far | |
47 julong _precount; // number of chars output, less _position | |
48 TimeStamp _stamp; // for time stamps | |
49 | |
50 void update_position(const char* s, size_t len); | |
51 static const char* do_vsnprintf(char* buffer, size_t buflen, | |
52 const char* format, va_list ap, | |
53 bool add_cr, | |
54 size_t& result_len); | |
55 | |
56 public: | |
57 // creation | |
58 outputStream(int width = 80); | |
59 outputStream(int width, bool has_time_stamps); | |
60 | |
61 // indentation | |
62 void indent(); | |
63 void inc() { _indentation++; }; | |
64 void dec() { _indentation--; }; | |
65 int indentation() const { return _indentation; } | |
66 void set_indentation(int i) { _indentation = i; } | |
67 void fill_to(int col); | |
100
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68 void move_to(int col, int slop = 6, int min_space = 2); |
0 | 69 |
70 // sizing | |
71 int width() const { return _width; } | |
72 int position() const { return _position; } | |
73 int newlines() const { return _newlines; } | |
74 julong count() const { return _precount + _position; } | |
75 void set_count(julong count) { _precount = count - _position; } | |
76 void set_position(int pos) { _position = pos; } | |
77 | |
78 // printing | |
79 void print(const char* format, ...); | |
80 void print_cr(const char* format, ...); | |
81 void vprint(const char *format, va_list argptr); | |
82 void vprint_cr(const char* format, va_list argptr); | |
83 void print_raw(const char* str) { write(str, strlen(str)); } | |
84 void print_raw(const char* str, int len) { write(str, len); } | |
85 void print_raw_cr(const char* str) { write(str, strlen(str)); cr(); } | |
86 void print_raw_cr(const char* str, int len){ write(str, len); cr(); } | |
87 void put(char ch); | |
100
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88 void sp(int count = 1); |
0 | 89 void cr(); |
90 void bol() { if (_position > 0) cr(); } | |
91 | |
92 // Time stamp | |
93 TimeStamp& time_stamp() { return _stamp; } | |
94 void stamp(); | |
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95 void stamp(bool guard, const char* prefix, const char* suffix); |
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96 void stamp(bool guard) { |
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97 stamp(guard, "", ": "); |
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98 } |
0 | 99 // Date stamp |
100 void date_stamp(bool guard, const char* prefix, const char* suffix); | |
101 // A simplified call that includes a suffix of ": " | |
102 void date_stamp(bool guard) { | |
103 date_stamp(guard, "", ": "); | |
104 } | |
105 | |
106 // portable printing of 64 bit integers | |
107 void print_jlong(jlong value); | |
108 void print_julong(julong value); | |
109 | |
110 // flushing | |
111 virtual void flush() {} | |
112 virtual void write(const char* str, size_t len) = 0; | |
113 virtual ~outputStream() {} // close properly on deletion | |
114 | |
115 void dec_cr() { dec(); cr(); } | |
116 void inc_cr() { inc(); cr(); } | |
117 }; | |
118 | |
119 // standard output | |
120 // ANSI C++ name collision | |
121 extern outputStream* tty; // tty output | |
122 extern outputStream* gclog_or_tty; // stream for gc log if -Xloggc:<f>, or tty | |
123 | |
124 // advisory locking for the shared tty stream: | |
125 class ttyLocker: StackObj { | |
126 private: | |
127 intx _holder; | |
128 | |
129 public: | |
130 static intx hold_tty(); // returns a "holder" token | |
131 static void release_tty(intx holder); // must witness same token | |
132 static void break_tty_lock_for_safepoint(intx holder); | |
133 | |
134 ttyLocker() { _holder = hold_tty(); } | |
135 ~ttyLocker() { release_tty(_holder); } | |
136 }; | |
137 | |
138 // for writing to strings; buffer will expand automatically | |
139 class stringStream : public outputStream { | |
140 protected: | |
141 char* buffer; | |
142 size_t buffer_pos; | |
143 size_t buffer_length; | |
144 bool buffer_fixed; | |
145 public: | |
146 stringStream(size_t initial_bufsize = 256); | |
147 stringStream(char* fixed_buffer, size_t fixed_buffer_size); | |
148 ~stringStream(); | |
149 virtual void write(const char* c, size_t len); | |
150 size_t size() { return buffer_pos; } | |
151 const char* base() { return buffer; } | |
152 void reset() { buffer_pos = 0; _precount = 0; _position = 0; } | |
153 char* as_string(); | |
154 }; | |
155 | |
156 class fileStream : public outputStream { | |
157 protected: | |
158 FILE* _file; | |
159 bool _need_close; | |
160 public: | |
161 fileStream(const char* file_name); | |
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162 fileStream(const char* file_name, const char* opentype); |
0 | 163 fileStream(FILE* file) { _file = file; _need_close = false; } |
164 ~fileStream(); | |
165 bool is_open() const { return _file != NULL; } | |
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166 void set_need_close(bool b) { _need_close = b;} |
0 | 167 virtual void write(const char* c, size_t len); |
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168 size_t read(void *data, size_t size, size_t count) { return ::fread(data, size, count, _file); } |
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169 char* readln(char *data, int count); |
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170 int eof() { return feof(_file); } |
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171 long fileSize(); |
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172 void rewind() { ::rewind(_file); } |
0 | 173 void flush(); |
174 }; | |
175 | |
176 // unlike fileStream, fdStream does unbuffered I/O by calling | |
177 // open() and write() directly. It is async-safe, but output | |
178 // from multiple thread may be mixed together. Used by fatal | |
179 // error handler. | |
180 class fdStream : public outputStream { | |
181 protected: | |
182 int _fd; | |
183 bool _need_close; | |
184 public: | |
185 fdStream(const char* file_name); | |
186 fdStream(int fd = -1) { _fd = fd; _need_close = false; } | |
187 ~fdStream(); | |
188 bool is_open() const { return _fd != -1; } | |
189 void set_fd(int fd) { _fd = fd; _need_close = false; } | |
190 int fd() const { return _fd; } | |
191 virtual void write(const char* c, size_t len); | |
192 void flush() {}; | |
193 }; | |
194 | |
195 void ostream_init(); | |
196 void ostream_init_log(); | |
197 void ostream_exit(); | |
198 void ostream_abort(); | |
199 | |
200 // staticBufferStream uses a user-supplied buffer for all formatting. | |
201 // Used for safe formatting during fatal error handling. Not MT safe. | |
202 // Do not share the stream between multiple threads. | |
203 class staticBufferStream : public outputStream { | |
204 private: | |
205 char* _buffer; | |
206 size_t _buflen; | |
207 outputStream* _outer_stream; | |
208 public: | |
209 staticBufferStream(char* buffer, size_t buflen, | |
210 outputStream *outer_stream); | |
211 ~staticBufferStream() {}; | |
212 virtual void write(const char* c, size_t len); | |
213 void flush(); | |
214 void print(const char* format, ...); | |
215 void print_cr(const char* format, ...); | |
216 void vprint(const char *format, va_list argptr); | |
217 void vprint_cr(const char* format, va_list argptr); | |
218 }; | |
219 | |
220 // In the non-fixed buffer case an underlying buffer will be created and | |
221 // managed in C heap. Not MT-safe. | |
222 class bufferedStream : public outputStream { | |
223 protected: | |
224 char* buffer; | |
225 size_t buffer_pos; | |
222 | 226 size_t buffer_max; |
0 | 227 size_t buffer_length; |
228 bool buffer_fixed; | |
229 public: | |
222 | 230 bufferedStream(size_t initial_bufsize = 256, size_t bufmax = 1024*1024*10); |
231 bufferedStream(char* fixed_buffer, size_t fixed_buffer_size, size_t bufmax = 1024*1024*10); | |
0 | 232 ~bufferedStream(); |
233 virtual void write(const char* c, size_t len); | |
234 size_t size() { return buffer_pos; } | |
235 const char* base() { return buffer; } | |
236 void reset() { buffer_pos = 0; _precount = 0; _position = 0; } | |
237 char* as_string(); | |
238 }; | |
239 | |
240 #define O_BUFLEN 2000 // max size of output of individual print() methods | |
241 | |
242 #ifndef PRODUCT | |
243 | |
244 class networkStream : public bufferedStream { | |
245 | |
246 private: | |
247 int _socket; | |
248 | |
249 public: | |
250 networkStream(); | |
251 ~networkStream(); | |
252 | |
253 bool connect(const char *host, short port); | |
254 bool is_open() const { return _socket != -1; } | |
255 int read(char *buf, size_t len); | |
256 void close(); | |
257 virtual void flush(); | |
258 }; | |
259 | |
260 #endif | |
1972 | 261 |
262 #endif // SHARE_VM_UTILITIES_OSTREAM_HPP |