Thu, 28 Jun 2012 17:03:16 -0400
6995781: Native Memory Tracking (Phase 1)
7151532: DCmd for hotspot native memory tracking
Summary: Implementation of native memory tracking phase 1, which tracks VM native memory usage, and related DCmd
Reviewed-by: acorn, coleenp, fparain
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 */
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 #ifdef TARGET_OS_FAMILY_bsd
43 # include "os_bsd.inline.hpp"
44 #endif
46 extern "C" void jio_print(const char* s); // Declarationtion of jvm method
48 outputStream::outputStream(int width) {
49 _width = width;
50 _position = 0;
51 _newlines = 0;
52 _precount = 0;
53 _indentation = 0;
54 }
56 outputStream::outputStream(int width, bool has_time_stamps) {
57 _width = width;
58 _position = 0;
59 _newlines = 0;
60 _precount = 0;
61 _indentation = 0;
62 if (has_time_stamps) _stamp.update();
63 }
65 void outputStream::update_position(const char* s, size_t len) {
66 for (size_t i = 0; i < len; i++) {
67 char ch = s[i];
68 if (ch == '\n') {
69 _newlines += 1;
70 _precount += _position + 1;
71 _position = 0;
72 } else if (ch == '\t') {
73 int tw = 8 - (_position & 7);
74 _position += tw;
75 _precount -= tw-1; // invariant: _precount + _position == total count
76 } else {
77 _position += 1;
78 }
79 }
80 }
82 // Execute a vsprintf, using the given buffer if necessary.
83 // Return a pointer to the formatted string.
84 const char* outputStream::do_vsnprintf(char* buffer, size_t buflen,
85 const char* format, va_list ap,
86 bool add_cr,
87 size_t& result_len) {
88 const char* result;
89 if (add_cr) buflen--;
90 if (!strchr(format, '%')) {
91 // constant format string
92 result = format;
93 result_len = strlen(result);
94 if (add_cr && result_len >= buflen) result_len = buflen-1; // truncate
95 } else if (format[0] == '%' && format[1] == 's' && format[2] == '\0') {
96 // trivial copy-through format string
97 result = va_arg(ap, const char*);
98 result_len = strlen(result);
99 if (add_cr && result_len >= buflen) result_len = buflen-1; // truncate
100 } else if (vsnprintf(buffer, buflen, format, ap) >= 0) {
101 result = buffer;
102 result_len = strlen(result);
103 } else {
104 DEBUG_ONLY(warning("increase O_BUFLEN in ostream.hpp -- output truncated");)
105 result = buffer;
106 result_len = buflen - 1;
107 buffer[result_len] = 0;
108 }
109 if (add_cr) {
110 if (result != buffer) {
111 strncpy(buffer, result, buflen);
112 result = buffer;
113 }
114 buffer[result_len++] = '\n';
115 buffer[result_len] = 0;
116 }
117 return result;
118 }
120 void outputStream::print(const char* format, ...) {
121 char buffer[O_BUFLEN];
122 va_list ap;
123 va_start(ap, format);
124 size_t len;
125 const char* str = do_vsnprintf(buffer, O_BUFLEN, format, ap, false, len);
126 write(str, len);
127 va_end(ap);
128 }
130 void outputStream::print_cr(const char* format, ...) {
131 char buffer[O_BUFLEN];
132 va_list ap;
133 va_start(ap, format);
134 size_t len;
135 const char* str = do_vsnprintf(buffer, O_BUFLEN, format, ap, true, len);
136 write(str, len);
137 va_end(ap);
138 }
140 void outputStream::vprint(const char *format, va_list argptr) {
141 char buffer[O_BUFLEN];
142 size_t len;
143 const char* str = do_vsnprintf(buffer, O_BUFLEN, format, argptr, false, len);
144 write(str, len);
145 }
147 void outputStream::vprint_cr(const char* format, va_list argptr) {
148 char buffer[O_BUFLEN];
149 size_t len;
150 const char* str = do_vsnprintf(buffer, O_BUFLEN, format, argptr, true, len);
151 write(str, len);
152 }
154 void outputStream::fill_to(int col) {
155 int need_fill = col - position();
156 sp(need_fill);
157 }
159 void outputStream::move_to(int col, int slop, int min_space) {
160 if (position() >= col + slop)
161 cr();
162 int need_fill = col - position();
163 if (need_fill < min_space)
164 need_fill = min_space;
165 sp(need_fill);
166 }
168 void outputStream::put(char ch) {
169 assert(ch != 0, "please fix call site");
170 char buf[] = { ch, '\0' };
171 write(buf, 1);
172 }
174 #define SP_USE_TABS false
176 void outputStream::sp(int count) {
177 if (count < 0) return;
178 if (SP_USE_TABS && count >= 8) {
179 int target = position() + count;
180 while (count >= 8) {
181 this->write("\t", 1);
182 count -= 8;
183 }
184 count = target - position();
185 }
186 while (count > 0) {
187 int nw = (count > 8) ? 8 : count;
188 this->write(" ", nw);
189 count -= nw;
190 }
191 }
193 void outputStream::cr() {
194 this->write("\n", 1);
195 }
197 void outputStream::stamp() {
198 if (! _stamp.is_updated()) {
199 _stamp.update(); // start at 0 on first call to stamp()
200 }
202 // outputStream::stamp() may get called by ostream_abort(), use snprintf
203 // to avoid allocating large stack buffer in print().
204 char buf[40];
205 jio_snprintf(buf, sizeof(buf), "%.3f", _stamp.seconds());
206 print_raw(buf);
207 }
209 void outputStream::stamp(bool guard,
210 const char* prefix,
211 const char* suffix) {
212 if (!guard) {
213 return;
214 }
215 print_raw(prefix);
216 stamp();
217 print_raw(suffix);
218 }
220 void outputStream::date_stamp(bool guard,
221 const char* prefix,
222 const char* suffix) {
223 if (!guard) {
224 return;
225 }
226 print_raw(prefix);
227 static const char error_time[] = "yyyy-mm-ddThh:mm:ss.mmm+zzzz";
228 static const int buffer_length = 32;
229 char buffer[buffer_length];
230 const char* iso8601_result = os::iso8601_time(buffer, buffer_length);
231 if (iso8601_result != NULL) {
232 print_raw(buffer);
233 } else {
234 print_raw(error_time);
235 }
236 print_raw(suffix);
237 return;
238 }
240 void outputStream::indent() {
241 while (_position < _indentation) sp();
242 }
244 void outputStream::print_jlong(jlong value) {
245 // N.B. Same as INT64_FORMAT
246 print(os::jlong_format_specifier(), value);
247 }
249 void outputStream::print_julong(julong value) {
250 // N.B. Same as UINT64_FORMAT
251 print(os::julong_format_specifier(), value);
252 }
254 stringStream::stringStream(size_t initial_size) : outputStream() {
255 buffer_length = initial_size;
256 buffer = NEW_RESOURCE_ARRAY(char, buffer_length);
257 buffer_pos = 0;
258 buffer_fixed = false;
259 }
261 // useful for output to fixed chunks of memory, such as performance counters
262 stringStream::stringStream(char* fixed_buffer, size_t fixed_buffer_size) : outputStream() {
263 buffer_length = fixed_buffer_size;
264 buffer = fixed_buffer;
265 buffer_pos = 0;
266 buffer_fixed = true;
267 }
269 void stringStream::write(const char* s, size_t len) {
270 size_t write_len = len; // number of non-null bytes to write
271 size_t end = buffer_pos + len + 1; // position after write and final '\0'
272 if (end > buffer_length) {
273 if (buffer_fixed) {
274 // if buffer cannot resize, silently truncate
275 end = buffer_length;
276 write_len = end - buffer_pos - 1; // leave room for the final '\0'
277 } else {
278 // For small overruns, double the buffer. For larger ones,
279 // increase to the requested size.
280 if (end < buffer_length * 2) {
281 end = buffer_length * 2;
282 }
283 char* oldbuf = buffer;
284 buffer = NEW_RESOURCE_ARRAY(char, end);
285 strncpy(buffer, oldbuf, buffer_pos);
286 buffer_length = end;
287 }
288 }
289 // invariant: buffer is always null-terminated
290 guarantee(buffer_pos + write_len + 1 <= buffer_length, "stringStream oob");
291 buffer[buffer_pos + write_len] = 0;
292 strncpy(buffer + buffer_pos, s, write_len);
293 buffer_pos += write_len;
295 // Note that the following does not depend on write_len.
296 // This means that position and count get updated
297 // even when overflow occurs.
298 update_position(s, len);
299 }
301 char* stringStream::as_string() {
302 char* copy = NEW_RESOURCE_ARRAY(char, buffer_pos+1);
303 strncpy(copy, buffer, buffer_pos);
304 copy[buffer_pos] = 0; // terminating null
305 return copy;
306 }
308 stringStream::~stringStream() {}
310 xmlStream* xtty;
311 outputStream* tty;
312 outputStream* gclog_or_tty;
313 extern Mutex* tty_lock;
315 fileStream::fileStream(const char* file_name) {
316 _file = fopen(file_name, "w");
317 _need_close = true;
318 }
320 fileStream::fileStream(const char* file_name, const char* opentype) {
321 _file = fopen(file_name, opentype);
322 _need_close = true;
323 }
325 void fileStream::write(const char* s, size_t len) {
326 if (_file != NULL) {
327 // Make an unused local variable to avoid warning from gcc 4.x compiler.
328 size_t count = fwrite(s, 1, len, _file);
329 }
330 update_position(s, len);
331 }
333 long fileStream::fileSize() {
334 long size = -1;
335 if (_file != NULL) {
336 long pos = ::ftell(_file);
337 if (::fseek(_file, 0, SEEK_END) == 0) {
338 size = ::ftell(_file);
339 }
340 ::fseek(_file, pos, SEEK_SET);
341 }
342 return size;
343 }
345 char* fileStream::readln(char *data, int count ) {
346 char * ret = ::fgets(data, count, _file);
347 //Get rid of annoying \n char
348 data[::strlen(data)-1] = '\0';
349 return ret;
350 }
352 fileStream::~fileStream() {
353 if (_file != NULL) {
354 if (_need_close) fclose(_file);
355 _file = NULL;
356 }
357 }
359 void fileStream::flush() {
360 fflush(_file);
361 }
363 fdStream::fdStream(const char* file_name) {
364 _fd = open(file_name, O_WRONLY | O_CREAT | O_TRUNC, 0666);
365 _need_close = true;
366 }
368 fdStream::~fdStream() {
369 if (_fd != -1) {
370 if (_need_close) close(_fd);
371 _fd = -1;
372 }
373 }
375 void fdStream::write(const char* s, size_t len) {
376 if (_fd != -1) {
377 // Make an unused local variable to avoid warning from gcc 4.x compiler.
378 size_t count = ::write(_fd, s, (int)len);
379 }
380 update_position(s, len);
381 }
383 rotatingFileStream::~rotatingFileStream() {
384 if (_file != NULL) {
385 if (_need_close) fclose(_file);
386 _file = NULL;
387 FREE_C_HEAP_ARRAY(char, _file_name, mtInternal);
388 _file_name = NULL;
389 }
390 }
392 rotatingFileStream::rotatingFileStream(const char* file_name) {
393 _cur_file_num = 0;
394 _bytes_writen = 0L;
395 _file_name = NEW_C_HEAP_ARRAY(char, strlen(file_name)+10, mtInternal);
396 jio_snprintf(_file_name, strlen(file_name)+10, "%s.%d", file_name, _cur_file_num);
397 _file = fopen(_file_name, "w");
398 _need_close = true;
399 }
401 rotatingFileStream::rotatingFileStream(const char* file_name, const char* opentype) {
402 _cur_file_num = 0;
403 _bytes_writen = 0L;
404 _file_name = NEW_C_HEAP_ARRAY(char, strlen(file_name)+10, mtInternal);
405 jio_snprintf(_file_name, strlen(file_name)+10, "%s.%d", file_name, _cur_file_num);
406 _file = fopen(_file_name, opentype);
407 _need_close = true;
408 }
410 void rotatingFileStream::write(const char* s, size_t len) {
411 if (_file != NULL) {
412 // Make an unused local variable to avoid warning from gcc 4.x compiler.
413 size_t count = fwrite(s, 1, len, _file);
414 Atomic::add((jlong)count, &_bytes_writen);
415 }
416 update_position(s, len);
417 }
419 // rotate_log must be called from VMThread at safepoint. In case need change parameters
420 // for gc log rotation from thread other than VMThread, a sub type of VM_Operation
421 // should be created and be submitted to VMThread's operation queue. DO NOT call this
422 // function directly. Currently, it is safe to rotate log at safepoint through VMThread.
423 // That is, no mutator threads and concurrent GC threads run parallel with VMThread to
424 // write to gc log file at safepoint. If in future, changes made for mutator threads or
425 // concurrent GC threads to run parallel with VMThread at safepoint, write and rotate_log
426 // must be synchronized.
427 void rotatingFileStream::rotate_log() {
428 if (_bytes_writen < (jlong)GCLogFileSize) return;
429 #ifdef ASSERT
430 Thread *thread = Thread::current();
431 assert(thread == NULL ||
432 (thread->is_VM_thread() && SafepointSynchronize::is_at_safepoint()),
433 "Must be VMThread at safepoint");
434 #endif
435 if (NumberOfGCLogFiles == 1) {
436 // rotate in same file
437 rewind();
438 _bytes_writen = 0L;
439 return;
440 }
442 // rotate file in names file.0, file.1, file.2, ..., file.<MaxGCLogFileNumbers-1>
443 // close current file, rotate to next file
444 if (_file != NULL) {
445 _cur_file_num ++;
446 if (_cur_file_num >= NumberOfGCLogFiles) _cur_file_num = 0;
447 jio_snprintf(_file_name, strlen(Arguments::gc_log_filename()) + 10, "%s.%d",
448 Arguments::gc_log_filename(), _cur_file_num);
449 fclose(_file);
450 _file = NULL;
451 }
452 _file = fopen(_file_name, "w");
453 if (_file != NULL) {
454 _bytes_writen = 0L;
455 _need_close = true;
456 } else {
457 tty->print_cr("failed to open rotation log file %s due to %s\n",
458 _file_name, strerror(errno));
459 _need_close = false;
460 }
461 }
463 defaultStream* defaultStream::instance = NULL;
464 int defaultStream::_output_fd = 1;
465 int defaultStream::_error_fd = 2;
466 FILE* defaultStream::_output_stream = stdout;
467 FILE* defaultStream::_error_stream = stderr;
469 #define LOG_MAJOR_VERSION 160
470 #define LOG_MINOR_VERSION 1
472 void defaultStream::init() {
473 _inited = true;
474 if (LogVMOutput || LogCompilation) {
475 init_log();
476 }
477 }
479 bool defaultStream::has_log_file() {
480 // lazily create log file (at startup, LogVMOutput is false even
481 // if +LogVMOutput is used, because the flags haven't been parsed yet)
482 // For safer printing during fatal error handling, do not init logfile
483 // if a VM error has been reported.
484 if (!_inited && !is_error_reported()) init();
485 return _log_file != NULL;
486 }
488 static const char* make_log_name(const char* log_name, const char* force_directory) {
489 const char* basename = log_name;
490 char file_sep = os::file_separator()[0];
491 const char* cp;
492 for (cp = log_name; *cp != '\0'; cp++) {
493 if (*cp == '/' || *cp == file_sep) {
494 basename = cp+1;
495 }
496 }
497 const char* nametail = log_name;
499 // Compute buffer length
500 size_t buffer_length;
501 if (force_directory != NULL) {
502 buffer_length = strlen(force_directory) + strlen(os::file_separator()) +
503 strlen(basename) + 1;
504 } else {
505 buffer_length = strlen(log_name) + 1;
506 }
508 const char* star = strchr(basename, '*');
509 int star_pos = (star == NULL) ? -1 : (star - nametail);
510 int skip = 1;
511 if (star == NULL) {
512 // Try %p
513 star = strstr(basename, "%p");
514 if (star != NULL) {
515 skip = 2;
516 }
517 }
518 star_pos = (star == NULL) ? -1 : (star - nametail);
520 char pid[32];
521 if (star_pos >= 0) {
522 jio_snprintf(pid, sizeof(pid), "%u", os::current_process_id());
523 buffer_length += strlen(pid);
524 }
526 // Create big enough buffer.
527 char *buf = NEW_C_HEAP_ARRAY(char, buffer_length, mtInternal);
529 strcpy(buf, "");
530 if (force_directory != NULL) {
531 strcat(buf, force_directory);
532 strcat(buf, os::file_separator());
533 nametail = basename; // completely skip directory prefix
534 }
536 if (star_pos >= 0) {
537 // convert foo*bar.log or foo%pbar.log to foo123bar.log
538 int buf_pos = (int) strlen(buf);
539 strncpy(&buf[buf_pos], nametail, star_pos);
540 strcpy(&buf[buf_pos + star_pos], pid);
541 nametail += star_pos + skip; // skip prefix and pid format
542 }
544 strcat(buf, nametail); // append rest of name, or all of name
545 return buf;
546 }
548 void defaultStream::init_log() {
549 // %%% Need a MutexLocker?
550 const char* log_name = LogFile != NULL ? LogFile : "hotspot.log";
551 const char* try_name = make_log_name(log_name, NULL);
552 fileStream* file = new(ResourceObj::C_HEAP, mtInternal) fileStream(try_name);
553 if (!file->is_open()) {
554 // Try again to open the file.
555 char warnbuf[O_BUFLEN*2];
556 jio_snprintf(warnbuf, sizeof(warnbuf),
557 "Warning: Cannot open log file: %s\n", try_name);
558 // Note: This feature is for maintainer use only. No need for L10N.
559 jio_print(warnbuf);
560 FREE_C_HEAP_ARRAY(char, try_name, mtInternal);
561 try_name = make_log_name("hs_pid%p.log", os::get_temp_directory());
562 jio_snprintf(warnbuf, sizeof(warnbuf),
563 "Warning: Forcing option -XX:LogFile=%s\n", try_name);
564 jio_print(warnbuf);
565 delete file;
566 file = new(ResourceObj::C_HEAP, mtInternal) fileStream(try_name);
567 FREE_C_HEAP_ARRAY(char, try_name, mtInternal);
568 }
569 if (file->is_open()) {
570 _log_file = file;
571 xmlStream* xs = new(ResourceObj::C_HEAP, mtInternal) xmlStream(file);
572 _outer_xmlStream = xs;
573 if (this == tty) xtty = xs;
574 // Write XML header.
575 xs->print_cr("<?xml version='1.0' encoding='UTF-8'?>");
576 // (For now, don't bother to issue a DTD for this private format.)
577 jlong time_ms = os::javaTimeMillis() - tty->time_stamp().milliseconds();
578 // %%% Should be: jlong time_ms = os::start_time_milliseconds(), if
579 // we ever get round to introduce that method on the os class
580 xs->head("hotspot_log version='%d %d'"
581 " process='%d' time_ms='"INT64_FORMAT"'",
582 LOG_MAJOR_VERSION, LOG_MINOR_VERSION,
583 os::current_process_id(), time_ms);
584 // Write VM version header immediately.
585 xs->head("vm_version");
586 xs->head("name"); xs->text("%s", VM_Version::vm_name()); xs->cr();
587 xs->tail("name");
588 xs->head("release"); xs->text("%s", VM_Version::vm_release()); xs->cr();
589 xs->tail("release");
590 xs->head("info"); xs->text("%s", VM_Version::internal_vm_info_string()); xs->cr();
591 xs->tail("info");
592 xs->tail("vm_version");
593 // Record information about the command-line invocation.
594 xs->head("vm_arguments"); // Cf. Arguments::print_on()
595 if (Arguments::num_jvm_flags() > 0) {
596 xs->head("flags");
597 Arguments::print_jvm_flags_on(xs->text());
598 xs->tail("flags");
599 }
600 if (Arguments::num_jvm_args() > 0) {
601 xs->head("args");
602 Arguments::print_jvm_args_on(xs->text());
603 xs->tail("args");
604 }
605 if (Arguments::java_command() != NULL) {
606 xs->head("command"); xs->text()->print_cr("%s", Arguments::java_command());
607 xs->tail("command");
608 }
609 if (Arguments::sun_java_launcher() != NULL) {
610 xs->head("launcher"); xs->text()->print_cr("%s", Arguments::sun_java_launcher());
611 xs->tail("launcher");
612 }
613 if (Arguments::system_properties() != NULL) {
614 xs->head("properties");
615 // Print it as a java-style property list.
616 // System properties don't generally contain newlines, so don't bother with unparsing.
617 for (SystemProperty* p = Arguments::system_properties(); p != NULL; p = p->next()) {
618 xs->text()->print_cr("%s=%s", p->key(), p->value());
619 }
620 xs->tail("properties");
621 }
622 xs->tail("vm_arguments");
623 // tty output per se is grouped under the <tty>...</tty> element.
624 xs->head("tty");
625 // All further non-markup text gets copied to the tty:
626 xs->_text = this; // requires friend declaration!
627 } else {
628 delete(file);
629 // and leave xtty as NULL
630 LogVMOutput = false;
631 DisplayVMOutput = true;
632 LogCompilation = false;
633 }
634 }
636 // finish_log() is called during normal VM shutdown. finish_log_on_error() is
637 // called by ostream_abort() after a fatal error.
638 //
639 void defaultStream::finish_log() {
640 xmlStream* xs = _outer_xmlStream;
641 xs->done("tty");
643 // Other log forks are appended here, at the End of Time:
644 CompileLog::finish_log(xs->out()); // write compile logging, if any, now
646 xs->done("hotspot_log");
647 xs->flush();
649 fileStream* file = _log_file;
650 _log_file = NULL;
652 delete _outer_xmlStream;
653 _outer_xmlStream = NULL;
655 file->flush();
656 delete file;
657 }
659 void defaultStream::finish_log_on_error(char *buf, int buflen) {
660 xmlStream* xs = _outer_xmlStream;
662 if (xs && xs->out()) {
664 xs->done_raw("tty");
666 // Other log forks are appended here, at the End of Time:
667 CompileLog::finish_log_on_error(xs->out(), buf, buflen); // write compile logging, if any, now
669 xs->done_raw("hotspot_log");
670 xs->flush();
672 fileStream* file = _log_file;
673 _log_file = NULL;
674 _outer_xmlStream = NULL;
676 if (file) {
677 file->flush();
679 // Can't delete or close the file because delete and fclose aren't
680 // async-safe. We are about to die, so leave it to the kernel.
681 // delete file;
682 }
683 }
684 }
686 intx defaultStream::hold(intx writer_id) {
687 bool has_log = has_log_file(); // check before locking
688 if (// impossible, but who knows?
689 writer_id == NO_WRITER ||
691 // bootstrap problem
692 tty_lock == NULL ||
694 // can't grab a lock or call Thread::current() if TLS isn't initialized
695 ThreadLocalStorage::thread() == NULL ||
697 // developer hook
698 !SerializeVMOutput ||
700 // VM already unhealthy
701 is_error_reported() ||
703 // safepoint == global lock (for VM only)
704 (SafepointSynchronize::is_synchronizing() &&
705 Thread::current()->is_VM_thread())
706 ) {
707 // do not attempt to lock unless we know the thread and the VM is healthy
708 return NO_WRITER;
709 }
710 if (_writer == writer_id) {
711 // already held, no need to re-grab the lock
712 return NO_WRITER;
713 }
714 tty_lock->lock_without_safepoint_check();
715 // got the lock
716 if (writer_id != _last_writer) {
717 if (has_log) {
718 _log_file->bol();
719 // output a hint where this output is coming from:
720 _log_file->print_cr("<writer thread='"INTX_FORMAT"'/>", writer_id);
721 }
722 _last_writer = writer_id;
723 }
724 _writer = writer_id;
725 return writer_id;
726 }
728 void defaultStream::release(intx holder) {
729 if (holder == NO_WRITER) {
730 // nothing to release: either a recursive lock, or we scribbled (too bad)
731 return;
732 }
733 if (_writer != holder) {
734 return; // already unlocked, perhaps via break_tty_lock_for_safepoint
735 }
736 _writer = NO_WRITER;
737 tty_lock->unlock();
738 }
741 // Yuck: jio_print does not accept char*/len.
742 static void call_jio_print(const char* s, size_t len) {
743 char buffer[O_BUFLEN+100];
744 if (len > sizeof(buffer)-1) {
745 warning("increase O_BUFLEN in ostream.cpp -- output truncated");
746 len = sizeof(buffer)-1;
747 }
748 strncpy(buffer, s, len);
749 buffer[len] = '\0';
750 jio_print(buffer);
751 }
754 void defaultStream::write(const char* s, size_t len) {
755 intx thread_id = os::current_thread_id();
756 intx holder = hold(thread_id);
758 if (DisplayVMOutput &&
759 (_outer_xmlStream == NULL || !_outer_xmlStream->inside_attrs())) {
760 // print to output stream. It can be redirected by a vfprintf hook
761 if (s[len] == '\0') {
762 jio_print(s);
763 } else {
764 call_jio_print(s, len);
765 }
766 }
768 // print to log file
769 if (has_log_file()) {
770 int nl0 = _newlines;
771 xmlTextStream::write(s, len);
772 // flush the log file too, if there were any newlines
773 if (nl0 != _newlines){
774 flush();
775 }
776 } else {
777 update_position(s, len);
778 }
780 release(holder);
781 }
783 intx ttyLocker::hold_tty() {
784 if (defaultStream::instance == NULL) return defaultStream::NO_WRITER;
785 intx thread_id = os::current_thread_id();
786 return defaultStream::instance->hold(thread_id);
787 }
789 void ttyLocker::release_tty(intx holder) {
790 if (holder == defaultStream::NO_WRITER) return;
791 defaultStream::instance->release(holder);
792 }
794 bool ttyLocker::release_tty_if_locked() {
795 intx thread_id = os::current_thread_id();
796 if (defaultStream::instance->writer() == thread_id) {
797 // release the lock and return true so callers know if was
798 // previously held.
799 release_tty(thread_id);
800 return true;
801 }
802 return false;
803 }
805 void ttyLocker::break_tty_lock_for_safepoint(intx holder) {
806 if (defaultStream::instance != NULL &&
807 defaultStream::instance->writer() == holder) {
808 if (xtty != NULL) {
809 xtty->print_cr("<!-- safepoint while printing -->");
810 }
811 defaultStream::instance->release(holder);
812 }
813 // (else there was no lock to break)
814 }
816 void ostream_init() {
817 if (defaultStream::instance == NULL) {
818 defaultStream::instance = new(ResourceObj::C_HEAP, mtInternal) defaultStream();
819 tty = defaultStream::instance;
821 // We want to ensure that time stamps in GC logs consider time 0
822 // the time when the JVM is initialized, not the first time we ask
823 // for a time stamp. So, here, we explicitly update the time stamp
824 // of tty.
825 tty->time_stamp().update_to(1);
826 }
827 }
829 void ostream_init_log() {
830 // For -Xloggc:<file> option - called in runtime/thread.cpp
831 // Note : this must be called AFTER ostream_init()
833 gclog_or_tty = tty; // default to tty
834 if (Arguments::gc_log_filename() != NULL) {
835 fileStream * gclog = UseGCLogFileRotation ?
836 new(ResourceObj::C_HEAP, mtInternal)
837 rotatingFileStream(Arguments::gc_log_filename()) :
838 new(ResourceObj::C_HEAP, mtInternal)
839 fileStream(Arguments::gc_log_filename());
840 if (gclog->is_open()) {
841 // now we update the time stamp of the GC log to be synced up
842 // with tty.
843 gclog->time_stamp().update_to(tty->time_stamp().ticks());
844 }
845 gclog_or_tty = gclog;
846 }
848 // If we haven't lazily initialized the logfile yet, do it now,
849 // to avoid the possibility of lazy initialization during a VM
850 // crash, which can affect the stability of the fatal error handler.
851 defaultStream::instance->has_log_file();
852 }
854 // ostream_exit() is called during normal VM exit to finish log files, flush
855 // output and free resource.
856 void ostream_exit() {
857 static bool ostream_exit_called = false;
858 if (ostream_exit_called) return;
859 ostream_exit_called = true;
860 if (gclog_or_tty != tty) {
861 delete gclog_or_tty;
862 }
863 {
864 // we temporaly disable PrintMallocFree here
865 // as otherwise it'll lead to using of almost deleted
866 // tty or defaultStream::instance in logging facility
867 // of HeapFree(), see 6391258
868 DEBUG_ONLY(FlagSetting fs(PrintMallocFree, false);)
869 if (tty != defaultStream::instance) {
870 delete tty;
871 }
872 if (defaultStream::instance != NULL) {
873 delete defaultStream::instance;
874 }
875 }
876 tty = NULL;
877 xtty = NULL;
878 gclog_or_tty = NULL;
879 defaultStream::instance = NULL;
880 }
882 // ostream_abort() is called by os::abort() when VM is about to die.
883 void ostream_abort() {
884 // Here we can't delete gclog_or_tty and tty, just flush their output
885 if (gclog_or_tty) gclog_or_tty->flush();
886 if (tty) tty->flush();
888 if (defaultStream::instance != NULL) {
889 static char buf[4096];
890 defaultStream::instance->finish_log_on_error(buf, sizeof(buf));
891 }
892 }
894 staticBufferStream::staticBufferStream(char* buffer, size_t buflen,
895 outputStream *outer_stream) {
896 _buffer = buffer;
897 _buflen = buflen;
898 _outer_stream = outer_stream;
899 // compile task prints time stamp relative to VM start
900 _stamp.update_to(1);
901 }
903 void staticBufferStream::write(const char* c, size_t len) {
904 _outer_stream->print_raw(c, (int)len);
905 }
907 void staticBufferStream::flush() {
908 _outer_stream->flush();
909 }
911 void staticBufferStream::print(const char* format, ...) {
912 va_list ap;
913 va_start(ap, format);
914 size_t len;
915 const char* str = do_vsnprintf(_buffer, _buflen, format, ap, false, len);
916 write(str, len);
917 va_end(ap);
918 }
920 void staticBufferStream::print_cr(const char* format, ...) {
921 va_list ap;
922 va_start(ap, format);
923 size_t len;
924 const char* str = do_vsnprintf(_buffer, _buflen, format, ap, true, len);
925 write(str, len);
926 va_end(ap);
927 }
929 void staticBufferStream::vprint(const char *format, va_list argptr) {
930 size_t len;
931 const char* str = do_vsnprintf(_buffer, _buflen, format, argptr, false, len);
932 write(str, len);
933 }
935 void staticBufferStream::vprint_cr(const char* format, va_list argptr) {
936 size_t len;
937 const char* str = do_vsnprintf(_buffer, _buflen, format, argptr, true, len);
938 write(str, len);
939 }
941 bufferedStream::bufferedStream(size_t initial_size, size_t bufmax) : outputStream() {
942 buffer_length = initial_size;
943 buffer = NEW_C_HEAP_ARRAY(char, buffer_length, mtInternal);
944 buffer_pos = 0;
945 buffer_fixed = false;
946 buffer_max = bufmax;
947 }
949 bufferedStream::bufferedStream(char* fixed_buffer, size_t fixed_buffer_size, size_t bufmax) : outputStream() {
950 buffer_length = fixed_buffer_size;
951 buffer = fixed_buffer;
952 buffer_pos = 0;
953 buffer_fixed = true;
954 buffer_max = bufmax;
955 }
957 void bufferedStream::write(const char* s, size_t len) {
959 if(buffer_pos + len > buffer_max) {
960 flush();
961 }
963 size_t end = buffer_pos + len;
964 if (end >= buffer_length) {
965 if (buffer_fixed) {
966 // if buffer cannot resize, silently truncate
967 len = buffer_length - buffer_pos - 1;
968 } else {
969 // For small overruns, double the buffer. For larger ones,
970 // increase to the requested size.
971 if (end < buffer_length * 2) {
972 end = buffer_length * 2;
973 }
974 buffer = REALLOC_C_HEAP_ARRAY(char, buffer, end, mtInternal);
975 buffer_length = end;
976 }
977 }
978 memcpy(buffer + buffer_pos, s, len);
979 buffer_pos += len;
980 update_position(s, len);
981 }
983 char* bufferedStream::as_string() {
984 char* copy = NEW_RESOURCE_ARRAY(char, buffer_pos+1);
985 strncpy(copy, buffer, buffer_pos);
986 copy[buffer_pos] = 0; // terminating null
987 return copy;
988 }
990 bufferedStream::~bufferedStream() {
991 if (!buffer_fixed) {
992 FREE_C_HEAP_ARRAY(char, buffer, mtInternal);
993 }
994 }
996 #ifndef PRODUCT
998 #if defined(SOLARIS) || defined(LINUX) || defined(_ALLBSD_SOURCE)
999 #include <sys/types.h>
1000 #include <sys/socket.h>
1001 #include <netinet/in.h>
1002 #include <arpa/inet.h>
1003 #endif
1005 // Network access
1006 networkStream::networkStream() : bufferedStream(1024*10, 1024*10) {
1008 _socket = -1;
1010 int result = os::socket(AF_INET, SOCK_STREAM, 0);
1011 if (result <= 0) {
1012 assert(false, "Socket could not be created!");
1013 } else {
1014 _socket = result;
1015 }
1016 }
1018 int networkStream::read(char *buf, size_t len) {
1019 return os::recv(_socket, buf, (int)len, 0);
1020 }
1022 void networkStream::flush() {
1023 if (size() != 0) {
1024 int result = os::raw_send(_socket, (char *)base(), size(), 0);
1025 assert(result != -1, "connection error");
1026 assert(result == (int)size(), "didn't send enough data");
1027 }
1028 reset();
1029 }
1031 networkStream::~networkStream() {
1032 close();
1033 }
1035 void networkStream::close() {
1036 if (_socket != -1) {
1037 flush();
1038 os::socket_close(_socket);
1039 _socket = -1;
1040 }
1041 }
1043 bool networkStream::connect(const char *ip, short port) {
1045 struct sockaddr_in server;
1046 server.sin_family = AF_INET;
1047 server.sin_port = htons(port);
1049 server.sin_addr.s_addr = inet_addr(ip);
1050 if (server.sin_addr.s_addr == (uint32_t)-1) {
1051 struct hostent* host = os::get_host_by_name((char*)ip);
1052 if (host != NULL) {
1053 memcpy(&server.sin_addr, host->h_addr_list[0], host->h_length);
1054 } else {
1055 return false;
1056 }
1057 }
1060 int result = os::connect(_socket, (struct sockaddr*)&server, sizeof(struct sockaddr_in));
1061 return (result >= 0);
1062 }
1064 #endif