1 /*
2 * Copyright (c) 1997, 2015, Oracle and/or its affiliates. All rights reserved.
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 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 *
23 */
24
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
31 class GCId;
32 DEBUG_ONLY(class ResourceMark;)
33
34 // Output streams for printing
35 //
36 // Printing guidelines:
37 // Where possible, please use tty->print() and tty->print_cr().
38 // For product mode VM warnings use warning() which internally uses tty.
39 // In places where tty is not initialized yet or too much overhead,
40 // we may use jio_printf:
41 // jio_fprintf(defaultStream::output_stream(), "Message");
42 // This allows for redirection via -XX:+DisplayVMOutputToStdout and
43 // -XX:+DisplayVMOutputToStderr
44 class outputStream : public ResourceObj {
45 protected:
46 int _indentation; // current indentation
47 int _width; // width of the page
48 int _position; // position on the current line
49 int _newlines; // number of '\n' output so far
219 // from multiple thread may be mixed together. Used by fatal
220 // error handler.
221 class fdStream : public outputStream {
222 protected:
223 int _fd;
224 bool _need_close;
225 public:
226 fdStream(const char* file_name);
227 fdStream(int fd = -1) { _fd = fd; _need_close = false; }
228 ~fdStream();
229 bool is_open() const { return _fd != -1; }
230 void set_fd(int fd) { _fd = fd; _need_close = false; }
231 int fd() const { return _fd; }
232 virtual void write(const char* c, size_t len);
233 void flush() {};
234 };
235
236 class logStream : public outputStream {
237 private:
238 stringStream _current_line;
239 void (*_log_func)(const char* fmt, ...);
240 public:
241 void write(const char* s, size_t len);
242 logStream(void (*log_func)(const char* fmt, ...)) : _log_func(log_func) {}
243 ~logStream() {
244 guarantee(_current_line.size() == 0, "Buffer not flushed. Missing call to print_cr()?");
245 }
246 };
247
248 void ostream_init();
249 void ostream_init_log();
250 void ostream_exit();
251 void ostream_abort();
252
253 // staticBufferStream uses a user-supplied buffer for all formatting.
254 // Used for safe formatting during fatal error handling. Not MT safe.
255 // Do not share the stream between multiple threads.
256 class staticBufferStream : public outputStream {
257 private:
258 char* _buffer;
259 size_t _buflen;
|
1 /*
2 * Copyright (c) 1997, 2016, Oracle and/or its affiliates. All rights reserved.
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 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 *
23 */
24
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 #include "utilities/globalDefinitions.hpp"
31
32 class GCId;
33 DEBUG_ONLY(class ResourceMark;)
34
35 // Output streams for printing
36 //
37 // Printing guidelines:
38 // Where possible, please use tty->print() and tty->print_cr().
39 // For product mode VM warnings use warning() which internally uses tty.
40 // In places where tty is not initialized yet or too much overhead,
41 // we may use jio_printf:
42 // jio_fprintf(defaultStream::output_stream(), "Message");
43 // This allows for redirection via -XX:+DisplayVMOutputToStdout and
44 // -XX:+DisplayVMOutputToStderr
45 class outputStream : public ResourceObj {
46 protected:
47 int _indentation; // current indentation
48 int _width; // width of the page
49 int _position; // position on the current line
50 int _newlines; // number of '\n' output so far
220 // from multiple thread may be mixed together. Used by fatal
221 // error handler.
222 class fdStream : public outputStream {
223 protected:
224 int _fd;
225 bool _need_close;
226 public:
227 fdStream(const char* file_name);
228 fdStream(int fd = -1) { _fd = fd; _need_close = false; }
229 ~fdStream();
230 bool is_open() const { return _fd != -1; }
231 void set_fd(int fd) { _fd = fd; _need_close = false; }
232 int fd() const { return _fd; }
233 virtual void write(const char* c, size_t len);
234 void flush() {};
235 };
236
237 class logStream : public outputStream {
238 private:
239 stringStream _current_line;
240 void (*_log_func)(const char* fmt, ...) ATTRIBUTE_PRINTF(1, 2);
241 public:
242 void write(const char* s, size_t len);
243 logStream(void (*log_func)(const char* fmt, ...)) : _log_func(log_func) {}
244 ~logStream() {
245 guarantee(_current_line.size() == 0, "Buffer not flushed. Missing call to print_cr()?");
246 }
247 };
248
249 void ostream_init();
250 void ostream_init_log();
251 void ostream_exit();
252 void ostream_abort();
253
254 // staticBufferStream uses a user-supplied buffer for all formatting.
255 // Used for safe formatting during fatal error handling. Not MT safe.
256 // Do not share the stream between multiple threads.
257 class staticBufferStream : public outputStream {
258 private:
259 char* _buffer;
260 size_t _buflen;
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