Mercurial > hg > truffle
annotate src/share/vm/utilities/ostream.hpp @ 2177:3582bf76420e
6990754: Use native memory and reference counting to implement SymbolTable
Summary: move symbols from permgen into C heap and reference count them
Reviewed-by: never, acorn, jmasa, stefank
| author | coleenp |
|---|---|
| date | Thu, 27 Jan 2011 16:11:27 -0800 |
| parents | f95d63e2154a |
| children | d8a72fbc4be7 |
| rev | line source |
|---|---|
| 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); | |
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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); | |
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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); | |
| 162 fileStream(FILE* file) { _file = file; _need_close = false; } | |
| 163 ~fileStream(); | |
| 164 bool is_open() const { return _file != NULL; } | |
| 165 virtual void write(const char* c, size_t len); | |
| 166 void flush(); | |
| 167 }; | |
| 168 | |
| 169 // unlike fileStream, fdStream does unbuffered I/O by calling | |
| 170 // open() and write() directly. It is async-safe, but output | |
| 171 // from multiple thread may be mixed together. Used by fatal | |
| 172 // error handler. | |
| 173 class fdStream : public outputStream { | |
| 174 protected: | |
| 175 int _fd; | |
| 176 bool _need_close; | |
| 177 public: | |
| 178 fdStream(const char* file_name); | |
| 179 fdStream(int fd = -1) { _fd = fd; _need_close = false; } | |
| 180 ~fdStream(); | |
| 181 bool is_open() const { return _fd != -1; } | |
| 182 void set_fd(int fd) { _fd = fd; _need_close = false; } | |
| 183 int fd() const { return _fd; } | |
| 184 virtual void write(const char* c, size_t len); | |
| 185 void flush() {}; | |
| 186 }; | |
| 187 | |
| 188 void ostream_init(); | |
| 189 void ostream_init_log(); | |
| 190 void ostream_exit(); | |
| 191 void ostream_abort(); | |
| 192 | |
| 193 // staticBufferStream uses a user-supplied buffer for all formatting. | |
| 194 // Used for safe formatting during fatal error handling. Not MT safe. | |
| 195 // Do not share the stream between multiple threads. | |
| 196 class staticBufferStream : public outputStream { | |
| 197 private: | |
| 198 char* _buffer; | |
| 199 size_t _buflen; | |
| 200 outputStream* _outer_stream; | |
| 201 public: | |
| 202 staticBufferStream(char* buffer, size_t buflen, | |
| 203 outputStream *outer_stream); | |
| 204 ~staticBufferStream() {}; | |
| 205 virtual void write(const char* c, size_t len); | |
| 206 void flush(); | |
| 207 void print(const char* format, ...); | |
| 208 void print_cr(const char* format, ...); | |
| 209 void vprint(const char *format, va_list argptr); | |
| 210 void vprint_cr(const char* format, va_list argptr); | |
| 211 }; | |
| 212 | |
| 213 // In the non-fixed buffer case an underlying buffer will be created and | |
| 214 // managed in C heap. Not MT-safe. | |
| 215 class bufferedStream : public outputStream { | |
| 216 protected: | |
| 217 char* buffer; | |
| 218 size_t buffer_pos; | |
| 222 | 219 size_t buffer_max; |
| 0 | 220 size_t buffer_length; |
| 221 bool buffer_fixed; | |
| 222 public: | |
| 222 | 223 bufferedStream(size_t initial_bufsize = 256, size_t bufmax = 1024*1024*10); |
| 224 bufferedStream(char* fixed_buffer, size_t fixed_buffer_size, size_t bufmax = 1024*1024*10); | |
| 0 | 225 ~bufferedStream(); |
| 226 virtual void write(const char* c, size_t len); | |
| 227 size_t size() { return buffer_pos; } | |
| 228 const char* base() { return buffer; } | |
| 229 void reset() { buffer_pos = 0; _precount = 0; _position = 0; } | |
| 230 char* as_string(); | |
| 231 }; | |
| 232 | |
| 233 #define O_BUFLEN 2000 // max size of output of individual print() methods | |
| 234 | |
| 235 #ifndef PRODUCT | |
| 236 | |
| 237 class networkStream : public bufferedStream { | |
| 238 | |
| 239 private: | |
| 240 int _socket; | |
| 241 | |
| 242 public: | |
| 243 networkStream(); | |
| 244 ~networkStream(); | |
| 245 | |
| 246 bool connect(const char *host, short port); | |
| 247 bool is_open() const { return _socket != -1; } | |
| 248 int read(char *buf, size_t len); | |
| 249 void close(); | |
| 250 virtual void flush(); | |
| 251 }; | |
| 252 | |
| 253 #endif | |
| 1972 | 254 |
| 255 #endif // SHARE_VM_UTILITIES_OSTREAM_HPP |