1 /*
2 * Copyright (c) 1997, 2011, 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 #include "precompiled.hpp"
26 #include "compiler/compileLog.hpp"
27 #include "oops/oop.inline.hpp"
28 #include "runtime/arguments.hpp"
29 #include "utilities/defaultStream.hpp"
30 #include "utilities/ostream.hpp"
31 #include "utilities/top.hpp"
32 #include "utilities/xmlstream.hpp"
33 #ifdef TARGET_OS_FAMILY_linux
34 # include "os_linux.inline.hpp"
35 #endif
36 #ifdef TARGET_OS_FAMILY_solaris
37 # include "os_solaris.inline.hpp"
38 #endif
39 #ifdef TARGET_OS_FAMILY_windows
40 # include "os_windows.inline.hpp"
41 #endif
42
43 extern "C" void jio_print(const char* s); // Declarationtion of jvm method
44
45 outputStream::outputStream(int width) {
46 _width = width;
47 _position = 0;
48 _newlines = 0;
49 _precount = 0;
50 _indentation = 0;
51 }
52
53 outputStream::outputStream(int width, bool has_time_stamps) {
54 _width = width;
55 _position = 0;
56 _newlines = 0;
57 _precount = 0;
58 _indentation = 0;
59 if (has_time_stamps) _stamp.update();
60 }
61
62 void outputStream::update_position(const char* s, size_t len) {
63 for (size_t i = 0; i < len; i++) {
64 char ch = s[i];
65 if (ch == '\n') {
66 _newlines += 1;
67 _precount += _position + 1;
68 _position = 0;
69 } else if (ch == '\t') {
70 int tw = 8 - (_position & 7);
71 _position += tw;
72 _precount -= tw-1; // invariant: _precount + _position == total count
73 } else {
74 _position += 1;
75 }
76 }
77 }
78
79 // Execute a vsprintf, using the given buffer if necessary.
80 // Return a pointer to the formatted string.
81 const char* outputStream::do_vsnprintf(char* buffer, size_t buflen,
82 const char* format, va_list ap,
83 bool add_cr,
84 size_t& result_len) {
85 const char* result;
86 if (add_cr) buflen--;
87 if (!strchr(format, '%')) {
88 // constant format string
89 result = format;
90 result_len = strlen(result);
91 if (add_cr && result_len >= buflen) result_len = buflen-1; // truncate
92 } else if (format[0] == '%' && format[1] == 's' && format[2] == '\0') {
93 // trivial copy-through format string
94 result = va_arg(ap, const char*);
95 result_len = strlen(result);
96 if (add_cr && result_len >= buflen) result_len = buflen-1; // truncate
97 } else if (vsnprintf(buffer, buflen, format, ap) >= 0) {
98 result = buffer;
99 result_len = strlen(result);
100 } else {
101 DEBUG_ONLY(warning("increase O_BUFLEN in ostream.hpp -- output truncated");)
102 result = buffer;
103 result_len = buflen - 1;
104 buffer[result_len] = 0;
105 }
106 if (add_cr) {
107 if (result != buffer) {
108 strncpy(buffer, result, buflen);
109 result = buffer;
110 }
111 buffer[result_len++] = '\n';
112 buffer[result_len] = 0;
113 }
114 return result;
115 }
116
117 void outputStream::print(const char* format, ...) {
118 char buffer[O_BUFLEN];
119 va_list ap;
120 va_start(ap, format);
121 size_t len;
122 const char* str = do_vsnprintf(buffer, O_BUFLEN, format, ap, false, len);
123 write(str, len);
124 va_end(ap);
125 }
126
127 void outputStream::print_cr(const char* format, ...) {
128 char buffer[O_BUFLEN];
129 va_list ap;
130 va_start(ap, format);
131 size_t len;
132 const char* str = do_vsnprintf(buffer, O_BUFLEN, format, ap, true, len);
133 write(str, len);
134 va_end(ap);
135 }
136
137 void outputStream::vprint(const char *format, va_list argptr) {
138 char buffer[O_BUFLEN];
139 size_t len;
140 const char* str = do_vsnprintf(buffer, O_BUFLEN, format, argptr, false, len);
141 write(str, len);
142 }
143
144 void outputStream::vprint_cr(const char* format, va_list argptr) {
145 char buffer[O_BUFLEN];
146 size_t len;
147 const char* str = do_vsnprintf(buffer, O_BUFLEN, format, argptr, true, len);
148 write(str, len);
149 }
150
151 void outputStream::fill_to(int col) {
152 int need_fill = col - position();
153 sp(need_fill);
154 }
155
156 void outputStream::move_to(int col, int slop, int min_space) {
157 if (position() >= col + slop)
158 cr();
159 int need_fill = col - position();
160 if (need_fill < min_space)
161 need_fill = min_space;
162 sp(need_fill);
163 }
164
165 void outputStream::put(char ch) {
166 assert(ch != 0, "please fix call site");
167 char buf[] = { ch, '\0' };
168 write(buf, 1);
169 }
170
171 #define SP_USE_TABS false
172
173 void outputStream::sp(int count) {
174 if (count < 0) return;
175 if (SP_USE_TABS && count >= 8) {
176 int target = position() + count;
177 while (count >= 8) {
178 this->write("\t", 1);
179 count -= 8;
180 }
181 count = target - position();
182 }
183 while (count > 0) {
184 int nw = (count > 8) ? 8 : count;
185 this->write(" ", nw);
186 count -= nw;
187 }
188 }
189
190 void outputStream::cr() {
191 this->write("\n", 1);
192 }
193
194 void outputStream::stamp() {
195 if (! _stamp.is_updated()) {
196 _stamp.update(); // start at 0 on first call to stamp()
197 }
198
199 // outputStream::stamp() may get called by ostream_abort(), use snprintf
200 // to avoid allocating large stack buffer in print().
201 char buf[40];
202 jio_snprintf(buf, sizeof(buf), "%.3f", _stamp.seconds());
203 print_raw(buf);
204 }
205
206 void outputStream::stamp(bool guard,
207 const char* prefix,
208 const char* suffix) {
209 if (!guard) {
210 return;
211 }
212 print_raw(prefix);
213 stamp();
214 print_raw(suffix);
215 }
216
217 void outputStream::date_stamp(bool guard,
218 const char* prefix,
219 const char* suffix) {
220 if (!guard) {
221 return;
222 }
223 print_raw(prefix);
224 static const char error_time[] = "yyyy-mm-ddThh:mm:ss.mmm+zzzz";
225 static const int buffer_length = 32;
226 char buffer[buffer_length];
227 const char* iso8601_result = os::iso8601_time(buffer, buffer_length);
228 if (iso8601_result != NULL) {
229 print_raw(buffer);
230 } else {
231 print_raw(error_time);
232 }
233 print_raw(suffix);
234 return;
235 }
236
237 void outputStream::indent() {
238 while (_position < _indentation) sp();
239 }
240
241 void outputStream::print_jlong(jlong value) {
242 // N.B. Same as INT64_FORMAT
243 print(os::jlong_format_specifier(), value);
244 }
245
246 void outputStream::print_julong(julong value) {
247 // N.B. Same as UINT64_FORMAT
248 print(os::julong_format_specifier(), value);
249 }
250
251 stringStream::stringStream(size_t initial_size) : outputStream() {
252 buffer_length = initial_size;
253 buffer = NEW_RESOURCE_ARRAY(char, buffer_length);
254 buffer_pos = 0;
255 buffer_fixed = false;
256 }
257
258 // useful for output to fixed chunks of memory, such as performance counters
259 stringStream::stringStream(char* fixed_buffer, size_t fixed_buffer_size) : outputStream() {
260 buffer_length = fixed_buffer_size;
261 buffer = fixed_buffer;
262 buffer_pos = 0;
263 buffer_fixed = true;
264 }
265
266 void stringStream::write(const char* s, size_t len) {
267 size_t write_len = len; // number of non-null bytes to write
268 size_t end = buffer_pos + len + 1; // position after write and final '\0'
269 if (end > buffer_length) {
270 if (buffer_fixed) {
271 // if buffer cannot resize, silently truncate
272 end = buffer_length;
273 write_len = end - buffer_pos - 1; // leave room for the final '\0'
274 } else {
275 // For small overruns, double the buffer. For larger ones,
276 // increase to the requested size.
277 if (end < buffer_length * 2) {
278 end = buffer_length * 2;
279 }
280 char* oldbuf = buffer;
281 buffer = NEW_RESOURCE_ARRAY(char, end);
282 strncpy(buffer, oldbuf, buffer_pos);
283 buffer_length = end;
284 }
285 }
286 // invariant: buffer is always null-terminated
287 guarantee(buffer_pos + write_len + 1 <= buffer_length, "stringStream oob");
288 buffer[buffer_pos + write_len] = 0;
289 strncpy(buffer + buffer_pos, s, write_len);
290 buffer_pos += write_len;
291
292 // Note that the following does not depend on write_len.
293 // This means that position and count get updated
294 // even when overflow occurs.
295 update_position(s, len);
296 }
297
298 char* stringStream::as_string() {
299 char* copy = NEW_RESOURCE_ARRAY(char, buffer_pos+1);
300 strncpy(copy, buffer, buffer_pos);
301 copy[buffer_pos] = 0; // terminating null
302 return copy;
303 }
304
305 stringStream::~stringStream() {}
306
307 xmlStream* xtty;
308 outputStream* tty;
309 outputStream* gclog_or_tty;
310 extern Mutex* tty_lock;
311
312 fileStream::fileStream(const char* file_name) {
313 _file = fopen(file_name, "w");
314 _need_close = true;
315 }
316
317 fileStream::fileStream(const char* file_name, const char* opentype) {
318 _file = fopen(file_name, opentype);
319 _need_close = true;
320 }
321
322 void fileStream::write(const char* s, size_t len) {
323 if (_file != NULL) {
324 // Make an unused local variable to avoid warning from gcc 4.x compiler.
325 size_t count = fwrite(s, 1, len, _file);
326 }
327 update_position(s, len);
328 }
329
330 long fileStream::fileSize() {
331 long size = -1;
332 if (_file != NULL) {
333 long pos = ::ftell(_file);
334 if (::fseek(_file, 0, SEEK_END) == 0) {
335 size = ::ftell(_file);
336 }
337 ::fseek(_file, pos, SEEK_SET);
338 }
339 return size;
340 }
341
342 char* fileStream::readln(char *data, int count ) {
343 char * ret = ::fgets(data, count, _file);
344 //Get rid of annoying \n char
345 data[::strlen(data)-1] = '\0';
346 return ret;
347 }
348
349 fileStream::~fileStream() {
350 if (_file != NULL) {
351 if (_need_close) fclose(_file);
352 _file = NULL;
353 }
354 }
355
356 void fileStream::flush() {
357 fflush(_file);
358 }
359
360 fdStream::fdStream(const char* file_name) {
361 _fd = open(file_name, O_WRONLY | O_CREAT | O_TRUNC, 0666);
362 _need_close = true;
363 }
364
365 fdStream::~fdStream() {
366 if (_fd != -1) {
367 if (_need_close) close(_fd);
368 _fd = -1;
369 }
370 }
371
372 void fdStream::write(const char* s, size_t len) {
373 if (_fd != -1) {
374 // Make an unused local variable to avoid warning from gcc 4.x compiler.
375 size_t count = ::write(_fd, s, (int)len);
376 }
377 update_position(s, len);
378 }
379
380 rotatingFileStream::~rotatingFileStream() {
381 if (_file != NULL) {
382 if (_need_close) fclose(_file);
383 _file = NULL;
384 FREE_C_HEAP_ARRAY(char, _file_name);
385 _file_name = NULL;
386 }
387 }
388
389 rotatingFileStream::rotatingFileStream(const char* file_name) {
390 _cur_file_num = 0;
391 _bytes_writen = 0L;
392 _file_name = NEW_C_HEAP_ARRAY(char, strlen(file_name)+10);
393 jio_snprintf(_file_name, strlen(file_name)+10, "%s.%d", file_name, _cur_file_num);
394 _file = fopen(_file_name, "w");
395 _need_close = true;
396 }
397
398 rotatingFileStream::rotatingFileStream(const char* file_name, const char* opentype) {
399 _cur_file_num = 0;
400 _bytes_writen = 0L;
401 _file_name = NEW_C_HEAP_ARRAY(char, strlen(file_name)+10);
402 jio_snprintf(_file_name, strlen(file_name)+10, "%s.%d", file_name, _cur_file_num);
403 _file = fopen(_file_name, opentype);
404 _need_close = true;
405 }
406
407 void rotatingFileStream::write(const char* s, size_t len) {
408 if (_file != NULL) {
409 // Make an unused local variable to avoid warning from gcc 4.x compiler.
410 size_t count = fwrite(s, 1, len, _file);
411 Atomic::add((jlong)count, &_bytes_writen);
412 }
413 update_position(s, len);
414 }
415
416 // rotate_log must be called from VMThread at safepoint. In case need change parameters
417 // for gc log rotation from thread other than VMThread, a sub type of VM_Operation
418 // should be created and be submitted to VMThread's operation queue. DO NOT call this
419 // function directly. Currently, it is safe to rotate log at safepoint through VMThread.
420 // That is, no mutator threads and concurrent GC threads run parallel with VMThread to
421 // write to gc log file at safepoint. If in future, changes made for mutator threads or
422 // concurrent GC threads to run parallel with VMThread at safepoint, write and rotate_log
423 // must be synchronized.
424 void rotatingFileStream::rotate_log() {
425 if (_bytes_writen < (jlong)GCLogFileSize) return;
426 #ifdef ASSERT
427 Thread *thread = Thread::current();
428 assert(thread == NULL ||
429 (thread->is_VM_thread() && SafepointSynchronize::is_at_safepoint()),
430 "Must be VMThread at safepoint");
431 #endif
432 if (NumberOfGCLogFiles == 1) {
433 // rotate in same file
434 rewind();
435 _bytes_writen = 0L;
436 return;
437 }
438
439 // rotate file in names file.0, file.1, file.2, ..., file.<MaxGCLogFileNumbers-1>
440 // close current file, rotate to next file
441 if (_file != NULL) {
442 _cur_file_num ++;
443 if (_cur_file_num >= NumberOfGCLogFiles) _cur_file_num = 0;
444 jio_snprintf(_file_name, strlen(Arguments::gc_log_filename()) + 10, "%s.%d",
445 Arguments::gc_log_filename(), _cur_file_num);
446 fclose(_file);
447 _file = NULL;
448 }
449 _file = fopen(_file_name, "w");
450 if (_file != NULL) {
451 _bytes_writen = 0L;
452 _need_close = true;
453 } else {
454 tty->print_cr("failed to open rotation log file %s due to %s\n",
455 _file_name, strerror(errno));
456 _need_close = false;
457 }
458 }
459
460 defaultStream* defaultStream::instance = NULL;
461 int defaultStream::_output_fd = 1;
462 int defaultStream::_error_fd = 2;
463 FILE* defaultStream::_output_stream = stdout;
464 FILE* defaultStream::_error_stream = stderr;
465
466 #define LOG_MAJOR_VERSION 160
467 #define LOG_MINOR_VERSION 1
468
469 void defaultStream::init() {
470 _inited = true;
471 if (LogVMOutput || LogCompilation) {
472 init_log();
473 }
474 }
475
476 bool defaultStream::has_log_file() {
477 // lazily create log file (at startup, LogVMOutput is false even
478 // if +LogVMOutput is used, because the flags haven't been parsed yet)
479 // For safer printing during fatal error handling, do not init logfile
480 // if a VM error has been reported.
481 if (!_inited && !is_error_reported()) init();
482 return _log_file != NULL;
483 }
484
485 static const char* make_log_name(const char* log_name, const char* force_directory) {
486 const char* basename = log_name;
487 char file_sep = os::file_separator()[0];
488 const char* cp;
489 for (cp = log_name; *cp != '\0'; cp++) {
490 if (*cp == '/' || *cp == file_sep) {
491 basename = cp+1;
492 }
493 }
494 const char* nametail = log_name;
495
496 // Compute buffer length
497 size_t buffer_length;
498 if (force_directory != NULL) {
499 buffer_length = strlen(force_directory) + strlen(os::file_separator()) +
500 strlen(basename) + 1;
501 } else {
502 buffer_length = strlen(log_name) + 1;
503 }
504
505 const char* star = strchr(basename, '*');
506 int star_pos = (star == NULL) ? -1 : (star - nametail);
507 int skip = 1;
508 if (star == NULL) {
509 // Try %p
510 star = strstr(basename, "%p");
511 if (star != NULL) {
512 skip = 2;
513 }
514 }
515 star_pos = (star == NULL) ? -1 : (star - nametail);
516
517 char pid[32];
518 if (star_pos >= 0) {
519 jio_snprintf(pid, sizeof(pid), "%u", os::current_process_id());
520 buffer_length += strlen(pid);
521 }
522
523 // Create big enough buffer.
524 char *buf = NEW_C_HEAP_ARRAY(char, buffer_length);
525
526 strcpy(buf, "");
527 if (force_directory != NULL) {
528 strcat(buf, force_directory);
529 strcat(buf, os::file_separator());
530 nametail = basename; // completely skip directory prefix
531 }
532
533 if (star_pos >= 0) {
534 // convert foo*bar.log or foo%pbar.log to foo123bar.log
535 int buf_pos = (int) strlen(buf);
536 strncpy(&buf[buf_pos], nametail, star_pos);
537 strcpy(&buf[buf_pos + star_pos], pid);
538 nametail += star_pos + skip; // skip prefix and pid format
539 }
540
541 strcat(buf, nametail); // append rest of name, or all of name
542 return buf;
543 }
544
545 void defaultStream::init_log() {
546 // %%% Need a MutexLocker?
547 const char* log_name = LogFile != NULL ? LogFile : "hotspot.log";
548 const char* try_name = make_log_name(log_name, NULL);
549 fileStream* file = new(ResourceObj::C_HEAP) fileStream(try_name);
550 if (!file->is_open()) {
551 // Try again to open the file.
552 char warnbuf[O_BUFLEN*2];
553 jio_snprintf(warnbuf, sizeof(warnbuf),
554 "Warning: Cannot open log file: %s\n", try_name);
555 // Note: This feature is for maintainer use only. No need for L10N.
556 jio_print(warnbuf);
557 FREE_C_HEAP_ARRAY(char, try_name);
558 try_name = make_log_name("hs_pid%p.log", os::get_temp_directory());
559 jio_snprintf(warnbuf, sizeof(warnbuf),
560 "Warning: Forcing option -XX:LogFile=%s\n", try_name);
561 jio_print(warnbuf);
562 delete file;
563 file = new(ResourceObj::C_HEAP) fileStream(try_name);
564 FREE_C_HEAP_ARRAY(char, try_name);
565 }
566 if (file->is_open()) {
567 _log_file = file;
568 xmlStream* xs = new(ResourceObj::C_HEAP) xmlStream(file);
569 _outer_xmlStream = xs;
570 if (this == tty) xtty = xs;
571 // Write XML header.
572 xs->print_cr("<?xml version='1.0' encoding='UTF-8'?>");
573 // (For now, don't bother to issue a DTD for this private format.)
574 jlong time_ms = os::javaTimeMillis() - tty->time_stamp().milliseconds();
575 // %%% Should be: jlong time_ms = os::start_time_milliseconds(), if
576 // we ever get round to introduce that method on the os class
577 xs->head("hotspot_log version='%d %d'"
578 " process='%d' time_ms='"INT64_FORMAT"'",
579 LOG_MAJOR_VERSION, LOG_MINOR_VERSION,
580 os::current_process_id(), time_ms);
581 // Write VM version header immediately.
582 xs->head("vm_version");
583 xs->head("name"); xs->text("%s", VM_Version::vm_name()); xs->cr();
584 xs->tail("name");
585 xs->head("release"); xs->text("%s", VM_Version::vm_release()); xs->cr();
586 xs->tail("release");
587 xs->head("info"); xs->text("%s", VM_Version::internal_vm_info_string()); xs->cr();
588 xs->tail("info");
589 xs->tail("vm_version");
590 // Record information about the command-line invocation.
591 xs->head("vm_arguments"); // Cf. Arguments::print_on()
592 if (Arguments::num_jvm_flags() > 0) {
593 xs->head("flags");
594 Arguments::print_jvm_flags_on(xs->text());
595 xs->tail("flags");
596 }
597 if (Arguments::num_jvm_args() > 0) {
598 xs->head("args");
599 Arguments::print_jvm_args_on(xs->text());
600 xs->tail("args");
601 }
602 if (Arguments::java_command() != NULL) {
603 xs->head("command"); xs->text()->print_cr("%s", Arguments::java_command());
604 xs->tail("command");
605 }
606 if (Arguments::sun_java_launcher() != NULL) {
607 xs->head("launcher"); xs->text()->print_cr("%s", Arguments::sun_java_launcher());
608 xs->tail("launcher");
609 }
610 if (Arguments::system_properties() != NULL) {
611 xs->head("properties");
612 // Print it as a java-style property list.
613 // System properties don't generally contain newlines, so don't bother with unparsing.
614 for (SystemProperty* p = Arguments::system_properties(); p != NULL; p = p->next()) {
615 xs->text()->print_cr("%s=%s", p->key(), p->value());
616 }
617 xs->tail("properties");
618 }
619 xs->tail("vm_arguments");
620 // tty output per se is grouped under the <tty>...</tty> element.
621 xs->head("tty");
622 // All further non-markup text gets copied to the tty:
623 xs->_text = this; // requires friend declaration!
624 } else {
625 delete(file);
626 // and leave xtty as NULL
627 LogVMOutput = false;
628 DisplayVMOutput = true;
629 LogCompilation = false;
630 }
631 }
632
633 // finish_log() is called during normal VM shutdown. finish_log_on_error() is
634 // called by ostream_abort() after a fatal error.
635 //
636 void defaultStream::finish_log() {
637 xmlStream* xs = _outer_xmlStream;
638 xs->done("tty");
639
640 // Other log forks are appended here, at the End of Time:
641 CompileLog::finish_log(xs->out()); // write compile logging, if any, now
642
643 xs->done("hotspot_log");
644 xs->flush();
645
646 fileStream* file = _log_file;
647 _log_file = NULL;
648
649 delete _outer_xmlStream;
650 _outer_xmlStream = NULL;
651
652 file->flush();
653 delete file;
654 }
655
656 void defaultStream::finish_log_on_error(char *buf, int buflen) {
657 xmlStream* xs = _outer_xmlStream;
658
659 if (xs && xs->out()) {
660
661 xs->done_raw("tty");
662
663 // Other log forks are appended here, at the End of Time:
664 CompileLog::finish_log_on_error(xs->out(), buf, buflen); // write compile logging, if any, now
665
666 xs->done_raw("hotspot_log");
667 xs->flush();
668
669 fileStream* file = _log_file;
670 _log_file = NULL;
671 _outer_xmlStream = NULL;
672
673 if (file) {
674 file->flush();
675
676 // Can't delete or close the file because delete and fclose aren't
677 // async-safe. We are about to die, so leave it to the kernel.
678 // delete file;
679 }
680 }
681 }
682
683 intx defaultStream::hold(intx writer_id) {
684 bool has_log = has_log_file(); // check before locking
685 if (// impossible, but who knows?
686 writer_id == NO_WRITER ||
687
688 // bootstrap problem
689 tty_lock == NULL ||
690
691 // can't grab a lock or call Thread::current() if TLS isn't initialized
692 ThreadLocalStorage::thread() == NULL ||
693
694 // developer hook
695 !SerializeVMOutput ||
696
697 // VM already unhealthy
698 is_error_reported() ||
699
700 // safepoint == global lock (for VM only)
701 (SafepointSynchronize::is_synchronizing() &&
702 Thread::current()->is_VM_thread())
703 ) {
704 // do not attempt to lock unless we know the thread and the VM is healthy
705 return NO_WRITER;
706 }
707 if (_writer == writer_id) {
708 // already held, no need to re-grab the lock
709 return NO_WRITER;
710 }
711 tty_lock->lock_without_safepoint_check();
712 // got the lock
713 if (writer_id != _last_writer) {
714 if (has_log) {
715 _log_file->bol();
716 // output a hint where this output is coming from:
717 _log_file->print_cr("<writer thread='"INTX_FORMAT"'/>", writer_id);
718 }
719 _last_writer = writer_id;
720 }
721 _writer = writer_id;
722 return writer_id;
723 }
724
725 void defaultStream::release(intx holder) {
726 if (holder == NO_WRITER) {
727 // nothing to release: either a recursive lock, or we scribbled (too bad)
728 return;
729 }
730 if (_writer != holder) {
731 return; // already unlocked, perhaps via break_tty_lock_for_safepoint
732 }
733 _writer = NO_WRITER;
734 tty_lock->unlock();
735 }
736
737
738 // Yuck: jio_print does not accept char*/len.
739 static void call_jio_print(const char* s, size_t len) {
740 char buffer[O_BUFLEN+100];
741 if (len > sizeof(buffer)-1) {
742 warning("increase O_BUFLEN in ostream.cpp -- output truncated");
743 len = sizeof(buffer)-1;
744 }
745 strncpy(buffer, s, len);
746 buffer[len] = '\0';
747 jio_print(buffer);
748 }
749
750
751 void defaultStream::write(const char* s, size_t len) {
752 intx thread_id = os::current_thread_id();
753 intx holder = hold(thread_id);
754
755 if (DisplayVMOutput &&
756 (_outer_xmlStream == NULL || !_outer_xmlStream->inside_attrs())) {
757 // print to output stream. It can be redirected by a vfprintf hook
758 if (s[len] == '\0') {
759 jio_print(s);
760 } else {
761 call_jio_print(s, len);
762 }
763 }
764
765 // print to log file
766 if (has_log_file()) {
767 int nl0 = _newlines;
768 xmlTextStream::write(s, len);
769 // flush the log file too, if there were any newlines
770 if (nl0 != _newlines){
771 flush();
772 }
773 } else {
774 update_position(s, len);
775 }
776
777 release(holder);
778 }
779
780 intx ttyLocker::hold_tty() {
781 if (defaultStream::instance == NULL) return defaultStream::NO_WRITER;
782 intx thread_id = os::current_thread_id();
783 return defaultStream::instance->hold(thread_id);
784 }
785
786 void ttyLocker::release_tty(intx holder) {
787 if (holder == defaultStream::NO_WRITER) return;
788 defaultStream::instance->release(holder);
789 }
790
791 bool ttyLocker::release_tty_if_locked() {
792 intx thread_id = os::current_thread_id();
793 if (defaultStream::instance->writer() == thread_id) {
794 // release the lock and return true so callers know if was
795 // previously held.
796 release_tty(thread_id);
797 return true;
798 }
799 return false;
800 }
801
802 void ttyLocker::break_tty_lock_for_safepoint(intx holder) {
803 if (defaultStream::instance != NULL &&
804 defaultStream::instance->writer() == holder) {
805 if (xtty != NULL) {
806 xtty->print_cr("<!-- safepoint while printing -->");
807 }
808 defaultStream::instance->release(holder);
809 }
810 // (else there was no lock to break)
811 }
812
813 void ostream_init() {
814 if (defaultStream::instance == NULL) {
815 defaultStream::instance = new(ResourceObj::C_HEAP) defaultStream();
816 tty = defaultStream::instance;
817
818 // We want to ensure that time stamps in GC logs consider time 0
819 // the time when the JVM is initialized, not the first time we ask
820 // for a time stamp. So, here, we explicitly update the time stamp
821 // of tty.
822 tty->time_stamp().update_to(1);
823 }
824 }
825
826 void ostream_init_log() {
827 // For -Xloggc:<file> option - called in runtime/thread.cpp
828 // Note : this must be called AFTER ostream_init()
829
830 gclog_or_tty = tty; // default to tty
831 if (Arguments::gc_log_filename() != NULL) {
832 fileStream * gclog = UseGCLogFileRotation ?
833 new(ResourceObj::C_HEAP)
834 rotatingFileStream(Arguments::gc_log_filename()) :
835 new(ResourceObj::C_HEAP)
836 fileStream(Arguments::gc_log_filename());
837 if (gclog->is_open()) {
838 // now we update the time stamp of the GC log to be synced up
839 // with tty.
840 gclog->time_stamp().update_to(tty->time_stamp().ticks());
841 }
842 gclog_or_tty = gclog;
843 }
844
845 // If we haven't lazily initialized the logfile yet, do it now,
846 // to avoid the possibility of lazy initialization during a VM
847 // crash, which can affect the stability of the fatal error handler.
848 defaultStream::instance->has_log_file();
849 }
850
851 // ostream_exit() is called during normal VM exit to finish log files, flush
852 // output and free resource.
853 void ostream_exit() {
854 static bool ostream_exit_called = false;
855 if (ostream_exit_called) return;
856 ostream_exit_called = true;
857 if (gclog_or_tty != tty) {
858 delete gclog_or_tty;
859 }
860 {
861 // we temporaly disable PrintMallocFree here
862 // as otherwise it'll lead to using of almost deleted
863 // tty or defaultStream::instance in logging facility
864 // of HeapFree(), see 6391258
865 DEBUG_ONLY(FlagSetting fs(PrintMallocFree, false);)
866 if (tty != defaultStream::instance) {
867 delete tty;
868 }
869 if (defaultStream::instance != NULL) {
870 delete defaultStream::instance;
871 }
872 }
873 tty = NULL;
874 xtty = NULL;
875 gclog_or_tty = NULL;
876 defaultStream::instance = NULL;
877 }
878
879 // ostream_abort() is called by os::abort() when VM is about to die.
880 void ostream_abort() {
881 // Here we can't delete gclog_or_tty and tty, just flush their output
882 if (gclog_or_tty) gclog_or_tty->flush();
883 if (tty) tty->flush();
884
885 if (defaultStream::instance != NULL) {
886 static char buf[4096];
887 defaultStream::instance->finish_log_on_error(buf, sizeof(buf));
888 }
889 }
890
891 staticBufferStream::staticBufferStream(char* buffer, size_t buflen,
892 outputStream *outer_stream) {
893 _buffer = buffer;
894 _buflen = buflen;
895 _outer_stream = outer_stream;
896 // compile task prints time stamp relative to VM start
897 _stamp.update_to(1);
898 }
899
900 void staticBufferStream::write(const char* c, size_t len) {
901 _outer_stream->print_raw(c, (int)len);
902 }
903
904 void staticBufferStream::flush() {
905 _outer_stream->flush();
906 }
907
908 void staticBufferStream::print(const char* format, ...) {
909 va_list ap;
910 va_start(ap, format);
911 size_t len;
912 const char* str = do_vsnprintf(_buffer, _buflen, format, ap, false, len);
913 write(str, len);
914 va_end(ap);
915 }
916
917 void staticBufferStream::print_cr(const char* format, ...) {
918 va_list ap;
919 va_start(ap, format);
920 size_t len;
921 const char* str = do_vsnprintf(_buffer, _buflen, format, ap, true, len);
922 write(str, len);
923 va_end(ap);
924 }
925
926 void staticBufferStream::vprint(const char *format, va_list argptr) {
927 size_t len;
928 const char* str = do_vsnprintf(_buffer, _buflen, format, argptr, false, len);
929 write(str, len);
930 }
931
932 void staticBufferStream::vprint_cr(const char* format, va_list argptr) {
933 size_t len;
934 const char* str = do_vsnprintf(_buffer, _buflen, format, argptr, true, len);
935 write(str, len);
936 }
937
938 bufferedStream::bufferedStream(size_t initial_size, size_t bufmax) : outputStream() {
939 buffer_length = initial_size;
940 buffer = NEW_C_HEAP_ARRAY(char, buffer_length);
941 buffer_pos = 0;
942 buffer_fixed = false;
943 buffer_max = bufmax;
944 }
945
946 bufferedStream::bufferedStream(char* fixed_buffer, size_t fixed_buffer_size, size_t bufmax) : outputStream() {
947 buffer_length = fixed_buffer_size;
948 buffer = fixed_buffer;
949 buffer_pos = 0;
950 buffer_fixed = true;
951 buffer_max = bufmax;
952 }
953
954 void bufferedStream::write(const char* s, size_t len) {
955
956 if(buffer_pos + len > buffer_max) {
957 flush();
958 }
959
960 size_t end = buffer_pos + len;
961 if (end >= buffer_length) {
962 if (buffer_fixed) {
963 // if buffer cannot resize, silently truncate
964 len = buffer_length - buffer_pos - 1;
965 } else {
966 // For small overruns, double the buffer. For larger ones,
967 // increase to the requested size.
968 if (end < buffer_length * 2) {
969 end = buffer_length * 2;
970 }
971 buffer = REALLOC_C_HEAP_ARRAY(char, buffer, end);
972 buffer_length = end;
973 }
974 }
975 memcpy(buffer + buffer_pos, s, len);
976 buffer_pos += len;
977 update_position(s, len);
978 }
979
980 char* bufferedStream::as_string() {
981 char* copy = NEW_RESOURCE_ARRAY(char, buffer_pos+1);
982 strncpy(copy, buffer, buffer_pos);
983 copy[buffer_pos] = 0; // terminating null
984 return copy;
985 }
986
987 bufferedStream::~bufferedStream() {
988 if (!buffer_fixed) {
989 FREE_C_HEAP_ARRAY(char, buffer);
990 }
991 }
992
993 #ifndef PRODUCT
994
995 #if defined(SOLARIS) || defined(LINUX)
996 #include <sys/types.h>
997 #include <sys/socket.h>
998 #include <netinet/in.h>
999 #include <arpa/inet.h>
1000 #endif
1001
1002 // Network access
1003 networkStream::networkStream() : bufferedStream(1024*10, 1024*10) {
1004
1005 _socket = -1;
1006
1007 int result = os::socket(AF_INET, SOCK_STREAM, 0);
1008 if (result <= 0) {
1009 assert(false, "Socket could not be created!");
1010 } else {
1011 _socket = result;
1012 }
1013 }
1014
1015 int networkStream::read(char *buf, size_t len) {
1016 return os::recv(_socket, buf, (int)len, 0);
1017 }
1018
1019 void networkStream::flush() {
1020 if (size() != 0) {
1021 int result = os::raw_send(_socket, (char *)base(), (int)size(), 0);
1022 assert(result != -1, "connection error");
1023 assert(result == (int)size(), "didn't send enough data");
1024 }
1025 reset();
1026 }
1027
1028 networkStream::~networkStream() {
1029 close();
1030 }
1031
1032 void networkStream::close() {
1033 if (_socket != -1) {
1034 flush();
1035 os::socket_close(_socket);
1036 _socket = -1;
1037 }
1038 }
1039
1040 bool networkStream::connect(const char *ip, short port) {
1041
1042 struct sockaddr_in server;
1043 server.sin_family = AF_INET;
1044 server.sin_port = htons(port);
1045
1046 server.sin_addr.s_addr = inet_addr(ip);
1047 if (server.sin_addr.s_addr == (uint32_t)-1) {
1048 struct hostent* host = os::get_host_by_name((char*)ip);
1049 if (host != NULL) {
1050 memcpy(&server.sin_addr, host->h_addr_list[0], host->h_length);
1051 } else {
1052 return false;
1053 }
1054 }
1055
1056
1057 int result = os::connect(_socket, (struct sockaddr*)&server, sizeof(struct sockaddr_in));
1058 return (result >= 0);
1059 }
1060
1061 #endif