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 #include "precompiled.hpp"
26 #include "compiler/compileLog.hpp"
27 #include "gc/shared/gcId.hpp"
28 #include "gc/shared/gcId.hpp"
29 #include "memory/resourceArea.hpp"
30 #include "oops/oop.inline.hpp"
31 #include "runtime/arguments.hpp"
32 #include "runtime/os.hpp"
33 #include "runtime/vm_version.hpp"
34 #include "utilities/defaultStream.hpp"
35 #include "utilities/macros.hpp"
36 #include "utilities/ostream.hpp"
37 #include "utilities/top.hpp"
38 #include "utilities/xmlstream.hpp"
39
40 extern "C" void jio_print(const char* s); // Declarationtion of jvm method
41
42 outputStream::outputStream(int width) {
43 _width = width;
44 _position = 0;
45 _newlines = 0;
46 _precount = 0;
47 _indentation = 0;
48 _scratch = NULL;
49 _scratch_len = 0;
50 }
51
52 outputStream::outputStream(int width, bool has_time_stamps) {
53 _width = width;
54 _position = 0;
55 _newlines = 0;
56 _precount = 0;
57 _indentation = 0;
58 _scratch = NULL;
59 _scratch_len = 0;
60 if (has_time_stamps) _stamp.update();
61 }
62
63 void outputStream::update_position(const char* s, size_t len) {
64 for (size_t i = 0; i < len; i++) {
65 char ch = s[i];
66 if (ch == '\n') {
67 _newlines += 1;
68 _precount += _position + 1;
69 _position = 0;
70 } else if (ch == '\t') {
71 int tw = 8 - (_position & 7);
72 _position += tw;
73 _precount -= tw-1; // invariant: _precount + _position == total count
74 } else {
75 _position += 1;
76 }
77 }
78 }
79
80 // Execute a vsprintf, using the given buffer if necessary.
81 // Return a pointer to the formatted string.
82 const char* outputStream::do_vsnprintf(char* buffer, size_t buflen,
83 const char* format, va_list ap,
84 bool add_cr,
85 size_t& result_len) {
86 assert(buflen >= 2, "buffer too small");
87
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 {
101 // Handle truncation:
102 // posix: upon truncation, vsnprintf returns number of bytes which
103 // would have been written (excluding terminating zero) had the buffer
104 // been large enough
105 // windows: upon truncation, vsnprintf returns -1
106 const int written = vsnprintf(buffer, buflen, format, ap);
107 result = buffer;
108 if (written < (int) buflen && written >= 0) {
109 result_len = written;
110 } else {
111 DEBUG_ONLY(warning("increase O_BUFLEN in ostream.hpp -- output truncated");)
112 result_len = buflen - 1;
113 buffer[result_len] = 0;
114 }
115 }
116 if (add_cr) {
117 if (result != buffer) {
118 memcpy(buffer, result, result_len);
119 result = buffer;
120 }
121 buffer[result_len++] = '\n';
122 buffer[result_len] = 0;
123 }
124 return result;
125 }
126
127 void outputStream::do_vsnprintf_and_write_with_automatic_buffer(const char* format, va_list ap, bool add_cr) {
128 char buffer[O_BUFLEN];
129 size_t len;
130 const char* str = do_vsnprintf(buffer, sizeof(buffer), format, ap, add_cr, len);
131 write(str, len);
132 }
133
134 void outputStream::do_vsnprintf_and_write_with_scratch_buffer(const char* format, va_list ap, bool add_cr) {
135 size_t len;
136 const char* str = do_vsnprintf(_scratch, _scratch_len, format, ap, add_cr, len);
137 write(str, len);
138 }
139
140 void outputStream::do_vsnprintf_and_write(const char* format, va_list ap, bool add_cr) {
141 if (_scratch) {
142 do_vsnprintf_and_write_with_scratch_buffer(format, ap, add_cr);
143 } else {
144 do_vsnprintf_and_write_with_automatic_buffer(format, ap, add_cr);
145 }
146 }
147
148 void outputStream::print(const char* format, ...) {
149 va_list ap;
150 va_start(ap, format);
151 do_vsnprintf_and_write(format, ap, false);
152 va_end(ap);
153 }
154
155 void outputStream::print_cr(const char* format, ...) {
156 va_list ap;
157 va_start(ap, format);
158 do_vsnprintf_and_write(format, ap, true);
159 va_end(ap);
160 }
161
162 void outputStream::vprint(const char *format, va_list argptr) {
163 do_vsnprintf_and_write(format, argptr, false);
164 }
165
166 void outputStream::vprint_cr(const char* format, va_list argptr) {
167 do_vsnprintf_and_write(format, argptr, true);
168 }
169
170 void outputStream::fill_to(int col) {
171 int need_fill = col - position();
172 sp(need_fill);
173 }
174
175 void outputStream::move_to(int col, int slop, int min_space) {
176 if (position() >= col + slop)
177 cr();
178 int need_fill = col - position();
179 if (need_fill < min_space)
180 need_fill = min_space;
181 sp(need_fill);
182 }
183
184 void outputStream::put(char ch) {
185 assert(ch != 0, "please fix call site");
186 char buf[] = { ch, '\0' };
187 write(buf, 1);
188 }
189
190 #define SP_USE_TABS false
191
192 void outputStream::sp(int count) {
193 if (count < 0) return;
194 if (SP_USE_TABS && count >= 8) {
195 int target = position() + count;
196 while (count >= 8) {
197 this->write("\t", 1);
198 count -= 8;
199 }
200 count = target - position();
201 }
202 while (count > 0) {
203 int nw = (count > 8) ? 8 : count;
204 this->write(" ", nw);
205 count -= nw;
206 }
207 }
208
209 void outputStream::cr() {
210 this->write("\n", 1);
211 }
212
213 void outputStream::stamp() {
214 if (! _stamp.is_updated()) {
215 _stamp.update(); // start at 0 on first call to stamp()
216 }
217
218 // outputStream::stamp() may get called by ostream_abort(), use snprintf
219 // to avoid allocating large stack buffer in print().
220 char buf[40];
221 jio_snprintf(buf, sizeof(buf), "%.3f", _stamp.seconds());
222 print_raw(buf);
223 }
224
225 void outputStream::stamp(bool guard,
226 const char* prefix,
227 const char* suffix) {
228 if (!guard) {
229 return;
230 }
231 print_raw(prefix);
232 stamp();
233 print_raw(suffix);
234 }
235
236 void outputStream::date_stamp(bool guard,
237 const char* prefix,
238 const char* suffix) {
239 if (!guard) {
240 return;
241 }
242 print_raw(prefix);
243 static const char error_time[] = "yyyy-mm-ddThh:mm:ss.mmm+zzzz";
244 static const int buffer_length = 32;
245 char buffer[buffer_length];
246 const char* iso8601_result = os::iso8601_time(buffer, buffer_length);
247 if (iso8601_result != NULL) {
248 print_raw(buffer);
249 } else {
250 print_raw(error_time);
251 }
252 print_raw(suffix);
253 return;
254 }
255
256 outputStream& outputStream::indent() {
257 while (_position < _indentation) sp();
258 return *this;
259 }
260
261 void outputStream::print_jlong(jlong value) {
262 print(JLONG_FORMAT, value);
263 }
264
265 void outputStream::print_julong(julong value) {
266 print(JULONG_FORMAT, value);
267 }
268
269 /**
270 * This prints out hex data in a 'windbg' or 'xxd' form, where each line is:
271 * <hex-address>: 8 * <hex-halfword> <ascii translation (optional)>
272 * example:
273 * 0000000: 7f44 4f46 0102 0102 0000 0000 0000 0000 .DOF............
274 * 0000010: 0000 0000 0000 0040 0000 0020 0000 0005 .......@... ....
275 * 0000020: 0000 0000 0000 0040 0000 0000 0000 015d .......@.......]
276 * ...
277 *
278 * indent is applied to each line. Ends with a CR.
279 */
280 void outputStream::print_data(void* data, size_t len, bool with_ascii) {
281 size_t limit = (len + 16) / 16 * 16;
282 for (size_t i = 0; i < limit; ++i) {
283 if (i % 16 == 0) {
284 indent().print(INTPTR_FORMAT_W(07) ":", i);
285 }
286 if (i % 2 == 0) {
287 print(" ");
288 }
289 if (i < len) {
290 print("%02x", ((unsigned char*)data)[i]);
291 } else {
292 print(" ");
293 }
294 if ((i + 1) % 16 == 0) {
295 if (with_ascii) {
296 print(" ");
297 for (size_t j = 0; j < 16; ++j) {
298 size_t idx = i + j - 15;
299 if (idx < len) {
300 char c = ((char*)data)[idx];
301 print("%c", c >= 32 && c <= 126 ? c : '.');
302 }
303 }
304 }
305 cr();
306 }
307 }
308 }
309
310 stringStream::stringStream(size_t initial_size) : outputStream() {
311 buffer_length = initial_size;
312 buffer = NEW_RESOURCE_ARRAY(char, buffer_length);
313 buffer_pos = 0;
314 buffer_fixed = false;
315 DEBUG_ONLY(rm = Thread::current()->current_resource_mark();)
316 }
317
318 // useful for output to fixed chunks of memory, such as performance counters
319 stringStream::stringStream(char* fixed_buffer, size_t fixed_buffer_size) : outputStream() {
320 buffer_length = fixed_buffer_size;
321 buffer = fixed_buffer;
322 buffer_pos = 0;
323 buffer_fixed = true;
324 }
325
326 void stringStream::write(const char* s, size_t len) {
327 size_t write_len = len; // number of non-null bytes to write
328 size_t end = buffer_pos + len + 1; // position after write and final '\0'
329 if (end > buffer_length) {
330 if (buffer_fixed) {
331 // if buffer cannot resize, silently truncate
332 end = buffer_length;
333 write_len = end - buffer_pos - 1; // leave room for the final '\0'
334 } else {
335 // For small overruns, double the buffer. For larger ones,
336 // increase to the requested size.
337 if (end < buffer_length * 2) {
338 end = buffer_length * 2;
339 }
340 char* oldbuf = buffer;
341 assert(rm == NULL || Thread::current()->current_resource_mark() == rm,
342 "StringStream is re-allocated with a different ResourceMark. Current: "
343 PTR_FORMAT " original: " PTR_FORMAT,
344 p2i(Thread::current()->current_resource_mark()), p2i(rm));
345 buffer = NEW_RESOURCE_ARRAY(char, end);
346 if (buffer_pos > 0) {
347 memcpy(buffer, oldbuf, buffer_pos);
348 }
349 buffer_length = end;
350 }
351 }
352 // invariant: buffer is always null-terminated
353 guarantee(buffer_pos + write_len + 1 <= buffer_length, "stringStream oob");
354 if (write_len > 0) {
355 buffer[buffer_pos + write_len] = 0;
356 memcpy(buffer + buffer_pos, s, write_len);
357 buffer_pos += write_len;
358 }
359
360 // Note that the following does not depend on write_len.
361 // This means that position and count get updated
362 // even when overflow occurs.
363 update_position(s, len);
364 }
365
366 char* stringStream::as_string() {
367 char* copy = NEW_RESOURCE_ARRAY(char, buffer_pos + 1);
368 strncpy(copy, buffer, buffer_pos);
369 copy[buffer_pos] = 0; // terminating null
370 return copy;
371 }
372
373 stringStream::~stringStream() {}
374
375 xmlStream* xtty;
376 outputStream* tty;
377 CDS_ONLY(fileStream* classlist_file;) // Only dump the classes that can be stored into the CDS archive
378 extern Mutex* tty_lock;
379
380 #define EXTRACHARLEN 32
381 #define CURRENTAPPX ".current"
382 // convert YYYY-MM-DD HH:MM:SS to YYYY-MM-DD_HH-MM-SS
383 char* get_datetime_string(char *buf, size_t len) {
384 os::local_time_string(buf, len);
385 int i = (int)strlen(buf);
386 while (--i >= 0) {
387 if (buf[i] == ' ') buf[i] = '_';
388 else if (buf[i] == ':') buf[i] = '-';
389 }
390 return buf;
391 }
392
393 static const char* make_log_name_internal(const char* log_name, const char* force_directory,
394 int pid, const char* tms) {
395 const char* basename = log_name;
396 char file_sep = os::file_separator()[0];
397 const char* cp;
398 char pid_text[32];
399
400 for (cp = log_name; *cp != '\0'; cp++) {
401 if (*cp == '/' || *cp == file_sep) {
402 basename = cp + 1;
403 }
404 }
405 const char* nametail = log_name;
406 // Compute buffer length
407 size_t buffer_length;
408 if (force_directory != NULL) {
409 buffer_length = strlen(force_directory) + strlen(os::file_separator()) +
410 strlen(basename) + 1;
411 } else {
412 buffer_length = strlen(log_name) + 1;
413 }
414
415 const char* pts = strstr(basename, "%p");
416 int pid_pos = (pts == NULL) ? -1 : (pts - nametail);
417
418 if (pid_pos >= 0) {
419 jio_snprintf(pid_text, sizeof(pid_text), "pid%u", pid);
420 buffer_length += strlen(pid_text);
421 }
422
423 pts = strstr(basename, "%t");
424 int tms_pos = (pts == NULL) ? -1 : (pts - nametail);
425 if (tms_pos >= 0) {
426 buffer_length += strlen(tms);
427 }
428
429 // File name is too long.
430 if (buffer_length > JVM_MAXPATHLEN) {
431 return NULL;
432 }
433
434 // Create big enough buffer.
435 char *buf = NEW_C_HEAP_ARRAY(char, buffer_length, mtInternal);
436
437 strcpy(buf, "");
438 if (force_directory != NULL) {
439 strcat(buf, force_directory);
440 strcat(buf, os::file_separator());
441 nametail = basename; // completely skip directory prefix
442 }
443
444 // who is first, %p or %t?
445 int first = -1, second = -1;
446 const char *p1st = NULL;
447 const char *p2nd = NULL;
448
449 if (pid_pos >= 0 && tms_pos >= 0) {
450 // contains both %p and %t
451 if (pid_pos < tms_pos) {
452 // case foo%pbar%tmonkey.log
453 first = pid_pos;
454 p1st = pid_text;
455 second = tms_pos;
456 p2nd = tms;
457 } else {
458 // case foo%tbar%pmonkey.log
459 first = tms_pos;
460 p1st = tms;
461 second = pid_pos;
462 p2nd = pid_text;
463 }
464 } else if (pid_pos >= 0) {
465 // contains %p only
466 first = pid_pos;
467 p1st = pid_text;
468 } else if (tms_pos >= 0) {
469 // contains %t only
470 first = tms_pos;
471 p1st = tms;
472 }
473
474 int buf_pos = (int)strlen(buf);
475 const char* tail = nametail;
476
477 if (first >= 0) {
478 tail = nametail + first + 2;
479 strncpy(&buf[buf_pos], nametail, first);
480 strcpy(&buf[buf_pos + first], p1st);
481 buf_pos = (int)strlen(buf);
482 if (second >= 0) {
483 strncpy(&buf[buf_pos], tail, second - first - 2);
484 strcpy(&buf[buf_pos + second - first - 2], p2nd);
485 tail = nametail + second + 2;
486 }
487 }
488 strcat(buf, tail); // append rest of name, or all of name
489 return buf;
490 }
491
492 // log_name comes from -XX:LogFile=log_name or
493 // -XX:DumpLoadedClassList=<file_name>
494 // in log_name, %p => pid1234 and
495 // %t => YYYY-MM-DD_HH-MM-SS
496 static const char* make_log_name(const char* log_name, const char* force_directory) {
497 char timestr[32];
498 get_datetime_string(timestr, sizeof(timestr));
499 return make_log_name_internal(log_name, force_directory, os::current_process_id(),
500 timestr);
501 }
502
503 fileStream::fileStream(const char* file_name) {
504 _file = fopen(file_name, "w");
505 if (_file != NULL) {
506 _need_close = true;
507 } else {
508 warning("Cannot open file %s due to %s\n", file_name, strerror(errno));
509 _need_close = false;
510 }
511 }
512
513 fileStream::fileStream(const char* file_name, const char* opentype) {
514 _file = fopen(file_name, opentype);
515 if (_file != NULL) {
516 _need_close = true;
517 } else {
518 warning("Cannot open file %s due to %s\n", file_name, strerror(errno));
519 _need_close = false;
520 }
521 }
522
523 void fileStream::write(const char* s, size_t len) {
524 if (_file != NULL) {
525 // Make an unused local variable to avoid warning from gcc 4.x compiler.
526 size_t count = fwrite(s, 1, len, _file);
527 }
528 update_position(s, len);
529 }
530
531 long fileStream::fileSize() {
532 long size = -1;
533 if (_file != NULL) {
534 long pos = ::ftell(_file);
535 if (::fseek(_file, 0, SEEK_END) == 0) {
536 size = ::ftell(_file);
537 }
538 ::fseek(_file, pos, SEEK_SET);
539 }
540 return size;
541 }
542
543 char* fileStream::readln(char *data, int count ) {
544 char * ret = ::fgets(data, count, _file);
545 //Get rid of annoying \n char
546 data[::strlen(data)-1] = '\0';
547 return ret;
548 }
549
550 fileStream::~fileStream() {
551 if (_file != NULL) {
552 if (_need_close) fclose(_file);
553 _file = NULL;
554 }
555 }
556
557 void fileStream::flush() {
558 fflush(_file);
559 }
560
561 fdStream::fdStream(const char* file_name) {
562 _fd = open(file_name, O_WRONLY | O_CREAT | O_TRUNC, 0666);
563 _need_close = true;
564 }
565
566 fdStream::~fdStream() {
567 if (_fd != -1) {
568 if (_need_close) close(_fd);
569 _fd = -1;
570 }
571 }
572
573 void fdStream::write(const char* s, size_t len) {
574 if (_fd != -1) {
575 // Make an unused local variable to avoid warning from gcc 4.x compiler.
576 size_t count = ::write(_fd, s, (int)len);
577 }
578 update_position(s, len);
579 }
580
581 defaultStream* defaultStream::instance = NULL;
582 int defaultStream::_output_fd = 1;
583 int defaultStream::_error_fd = 2;
584 FILE* defaultStream::_output_stream = stdout;
585 FILE* defaultStream::_error_stream = stderr;
586
587 #define LOG_MAJOR_VERSION 160
588 #define LOG_MINOR_VERSION 1
589
590 void defaultStream::init() {
591 _inited = true;
592 if (LogVMOutput || LogCompilation) {
593 init_log();
594 }
595 }
596
597 bool defaultStream::has_log_file() {
598 // lazily create log file (at startup, LogVMOutput is false even
599 // if +LogVMOutput is used, because the flags haven't been parsed yet)
600 // For safer printing during fatal error handling, do not init logfile
601 // if a VM error has been reported.
602 if (!_inited && !is_error_reported()) init();
603 return _log_file != NULL;
604 }
605
606 fileStream* defaultStream::open_file(const char* log_name) {
607 const char* try_name = make_log_name(log_name, NULL);
608 if (try_name == NULL) {
609 warning("Cannot open file %s: file name is too long.\n", log_name);
610 return NULL;
611 }
612
613 fileStream* file = new(ResourceObj::C_HEAP, mtInternal) fileStream(try_name);
614 FREE_C_HEAP_ARRAY(char, try_name);
615 if (file->is_open()) {
616 return file;
617 }
618
619 // Try again to open the file in the temp directory.
620 delete file;
621 char warnbuf[O_BUFLEN*2];
622 jio_snprintf(warnbuf, sizeof(warnbuf), "Warning: Cannot open log file: %s\n", log_name);
623 // Note: This feature is for maintainer use only. No need for L10N.
624 jio_print(warnbuf);
625 try_name = make_log_name(log_name, os::get_temp_directory());
626 if (try_name == NULL) {
627 warning("Cannot open file %s: file name is too long for directory %s.\n", log_name, os::get_temp_directory());
628 return NULL;
629 }
630
631 jio_snprintf(warnbuf, sizeof(warnbuf),
632 "Warning: Forcing option -XX:LogFile=%s\n", try_name);
633 jio_print(warnbuf);
634
635 file = new(ResourceObj::C_HEAP, mtInternal) fileStream(try_name);
636 FREE_C_HEAP_ARRAY(char, try_name);
637 if (file->is_open()) {
638 return file;
639 }
640
641 delete file;
642 return NULL;
643 }
644
645 void defaultStream::init_log() {
646 // %%% Need a MutexLocker?
647 const char* log_name = LogFile != NULL ? LogFile : "hotspot_%p.log";
648 fileStream* file = open_file(log_name);
649
650 if (file != NULL) {
651 _log_file = file;
652 _outer_xmlStream = new(ResourceObj::C_HEAP, mtInternal) xmlStream(file);
653 start_log();
654 } else {
655 // and leave xtty as NULL
656 LogVMOutput = false;
657 DisplayVMOutput = true;
658 LogCompilation = false;
659 }
660 }
661
662 void defaultStream::start_log() {
663 xmlStream*xs = _outer_xmlStream;
664 if (this == tty) xtty = xs;
665 // Write XML header.
666 xs->print_cr("<?xml version='1.0' encoding='UTF-8'?>");
667 // (For now, don't bother to issue a DTD for this private format.)
668 jlong time_ms = os::javaTimeMillis() - tty->time_stamp().milliseconds();
669 // %%% Should be: jlong time_ms = os::start_time_milliseconds(), if
670 // we ever get round to introduce that method on the os class
671 xs->head("hotspot_log version='%d %d'"
672 " process='%d' time_ms='" INT64_FORMAT "'",
673 LOG_MAJOR_VERSION, LOG_MINOR_VERSION,
674 os::current_process_id(), (int64_t)time_ms);
675 // Write VM version header immediately.
676 xs->head("vm_version");
677 xs->head("name"); xs->text("%s", VM_Version::vm_name()); xs->cr();
678 xs->tail("name");
679 xs->head("release"); xs->text("%s", VM_Version::vm_release()); xs->cr();
680 xs->tail("release");
681 xs->head("info"); xs->text("%s", VM_Version::internal_vm_info_string()); xs->cr();
682 xs->tail("info");
683 xs->tail("vm_version");
684 // Record information about the command-line invocation.
685 xs->head("vm_arguments"); // Cf. Arguments::print_on()
686 if (Arguments::num_jvm_flags() > 0) {
687 xs->head("flags");
688 Arguments::print_jvm_flags_on(xs->text());
689 xs->tail("flags");
690 }
691 if (Arguments::num_jvm_args() > 0) {
692 xs->head("args");
693 Arguments::print_jvm_args_on(xs->text());
694 xs->tail("args");
695 }
696 if (Arguments::java_command() != NULL) {
697 xs->head("command"); xs->text()->print_cr("%s", Arguments::java_command());
698 xs->tail("command");
699 }
700 if (Arguments::sun_java_launcher() != NULL) {
701 xs->head("launcher"); xs->text()->print_cr("%s", Arguments::sun_java_launcher());
702 xs->tail("launcher");
703 }
704 if (Arguments::system_properties() != NULL) {
705 xs->head("properties");
706 // Print it as a java-style property list.
707 // System properties don't generally contain newlines, so don't bother with unparsing.
708 outputStream *text = xs->text();
709 for (SystemProperty* p = Arguments::system_properties(); p != NULL; p = p->next()) {
710 // Print in two stages to avoid problems with long
711 // keys/values.
712 text->print_raw(p->key());
713 text->put('=');
714 text->print_raw_cr(p->value());
715 }
716 xs->tail("properties");
717 }
718 xs->tail("vm_arguments");
719 // tty output per se is grouped under the <tty>...</tty> element.
720 xs->head("tty");
721 // All further non-markup text gets copied to the tty:
722 xs->_text = this; // requires friend declaration!
723 }
724
725 // finish_log() is called during normal VM shutdown. finish_log_on_error() is
726 // called by ostream_abort() after a fatal error.
727 //
728 void defaultStream::finish_log() {
729 xmlStream* xs = _outer_xmlStream;
730 xs->done("tty");
731
732 // Other log forks are appended here, at the End of Time:
733 CompileLog::finish_log(xs->out()); // write compile logging, if any, now
734
735 xs->done("hotspot_log");
736 xs->flush();
737
738 fileStream* file = _log_file;
739 _log_file = NULL;
740
741 delete _outer_xmlStream;
742 _outer_xmlStream = NULL;
743
744 file->flush();
745 delete file;
746 }
747
748 void defaultStream::finish_log_on_error(char *buf, int buflen) {
749 xmlStream* xs = _outer_xmlStream;
750
751 if (xs && xs->out()) {
752
753 xs->done_raw("tty");
754
755 // Other log forks are appended here, at the End of Time:
756 CompileLog::finish_log_on_error(xs->out(), buf, buflen); // write compile logging, if any, now
757
758 xs->done_raw("hotspot_log");
759 xs->flush();
760
761 fileStream* file = _log_file;
762 _log_file = NULL;
763 _outer_xmlStream = NULL;
764
765 if (file) {
766 file->flush();
767
768 // Can't delete or close the file because delete and fclose aren't
769 // async-safe. We are about to die, so leave it to the kernel.
770 // delete file;
771 }
772 }
773 }
774
775 intx defaultStream::hold(intx writer_id) {
776 bool has_log = has_log_file(); // check before locking
777 if (// impossible, but who knows?
778 writer_id == NO_WRITER ||
779
780 // bootstrap problem
781 tty_lock == NULL ||
782
783 // can't grab a lock if current Thread isn't set
784 Thread::current_or_null() == NULL ||
785
786 // developer hook
787 !SerializeVMOutput ||
788
789 // VM already unhealthy
790 is_error_reported() ||
791
792 // safepoint == global lock (for VM only)
793 (SafepointSynchronize::is_synchronizing() &&
794 Thread::current()->is_VM_thread())
795 ) {
796 // do not attempt to lock unless we know the thread and the VM is healthy
797 return NO_WRITER;
798 }
799 if (_writer == writer_id) {
800 // already held, no need to re-grab the lock
801 return NO_WRITER;
802 }
803 tty_lock->lock_without_safepoint_check();
804 // got the lock
805 if (writer_id != _last_writer) {
806 if (has_log) {
807 _log_file->bol();
808 // output a hint where this output is coming from:
809 _log_file->print_cr("<writer thread='" UINTX_FORMAT "'/>", writer_id);
810 }
811 _last_writer = writer_id;
812 }
813 _writer = writer_id;
814 return writer_id;
815 }
816
817 void defaultStream::release(intx holder) {
818 if (holder == NO_WRITER) {
819 // nothing to release: either a recursive lock, or we scribbled (too bad)
820 return;
821 }
822 if (_writer != holder) {
823 return; // already unlocked, perhaps via break_tty_lock_for_safepoint
824 }
825 _writer = NO_WRITER;
826 tty_lock->unlock();
827 }
828
829
830 // Yuck: jio_print does not accept char*/len.
831 static void call_jio_print(const char* s, size_t len) {
832 char buffer[O_BUFLEN+100];
833 if (len > sizeof(buffer)-1) {
834 warning("increase O_BUFLEN in ostream.cpp -- output truncated");
835 len = sizeof(buffer)-1;
836 }
837 strncpy(buffer, s, len);
838 buffer[len] = '\0';
839 jio_print(buffer);
840 }
841
842
843 void defaultStream::write(const char* s, size_t len) {
844 intx thread_id = os::current_thread_id();
845 intx holder = hold(thread_id);
846
847 if (DisplayVMOutput &&
848 (_outer_xmlStream == NULL || !_outer_xmlStream->inside_attrs())) {
849 // print to output stream. It can be redirected by a vfprintf hook
850 if (s[len] == '\0') {
851 jio_print(s);
852 } else {
853 call_jio_print(s, len);
854 }
855 }
856
857 // print to log file
858 if (has_log_file()) {
859 int nl0 = _newlines;
860 xmlTextStream::write(s, len);
861 // flush the log file too, if there were any newlines
862 if (nl0 != _newlines){
863 flush();
864 }
865 } else {
866 update_position(s, len);
867 }
868
869 release(holder);
870 }
871
872 intx ttyLocker::hold_tty() {
873 if (defaultStream::instance == NULL) return defaultStream::NO_WRITER;
874 intx thread_id = os::current_thread_id();
875 return defaultStream::instance->hold(thread_id);
876 }
877
878 void ttyLocker::release_tty(intx holder) {
879 if (holder == defaultStream::NO_WRITER) return;
880 defaultStream::instance->release(holder);
881 }
882
883 bool ttyLocker::release_tty_if_locked() {
884 intx thread_id = os::current_thread_id();
885 if (defaultStream::instance->writer() == thread_id) {
886 // release the lock and return true so callers know if was
887 // previously held.
888 release_tty(thread_id);
889 return true;
890 }
891 return false;
892 }
893
894 void ttyLocker::break_tty_lock_for_safepoint(intx holder) {
895 if (defaultStream::instance != NULL &&
896 defaultStream::instance->writer() == holder) {
897 if (xtty != NULL) {
898 xtty->print_cr("<!-- safepoint while printing -->");
899 }
900 defaultStream::instance->release(holder);
901 }
902 // (else there was no lock to break)
903 }
904
905 void ostream_init() {
906 if (defaultStream::instance == NULL) {
907 defaultStream::instance = new(ResourceObj::C_HEAP, mtInternal) defaultStream();
908 tty = defaultStream::instance;
909
910 // We want to ensure that time stamps in GC logs consider time 0
911 // the time when the JVM is initialized, not the first time we ask
912 // for a time stamp. So, here, we explicitly update the time stamp
913 // of tty.
914 tty->time_stamp().update_to(1);
915 }
916 }
917
918 void ostream_init_log() {
919 // Note : this must be called AFTER ostream_init()
920
921 #if INCLUDE_CDS
922 // For -XX:DumpLoadedClassList=<file> option
923 if (DumpLoadedClassList != NULL) {
924 const char* list_name = make_log_name(DumpLoadedClassList, NULL);
925 classlist_file = new(ResourceObj::C_HEAP, mtInternal)
926 fileStream(list_name);
927 FREE_C_HEAP_ARRAY(char, list_name);
928 }
929 #endif
930
931 // If we haven't lazily initialized the logfile yet, do it now,
932 // to avoid the possibility of lazy initialization during a VM
933 // crash, which can affect the stability of the fatal error handler.
934 defaultStream::instance->has_log_file();
935 }
936
937 // ostream_exit() is called during normal VM exit to finish log files, flush
938 // output and free resource.
939 void ostream_exit() {
940 static bool ostream_exit_called = false;
941 if (ostream_exit_called) return;
942 ostream_exit_called = true;
943 #if INCLUDE_CDS
944 if (classlist_file != NULL) {
945 delete classlist_file;
946 }
947 #endif
948 {
949 // we temporaly disable PrintMallocFree here
950 // as otherwise it'll lead to using of almost deleted
951 // tty or defaultStream::instance in logging facility
952 // of HeapFree(), see 6391258
953 DEBUG_ONLY(FlagSetting fs(PrintMallocFree, false);)
954 if (tty != defaultStream::instance) {
955 delete tty;
956 }
957 if (defaultStream::instance != NULL) {
958 delete defaultStream::instance;
959 }
960 }
961 tty = NULL;
962 xtty = NULL;
963 defaultStream::instance = NULL;
964 }
965
966 // ostream_abort() is called by os::abort() when VM is about to die.
967 void ostream_abort() {
968 // Here we can't delete tty, just flush its output
969 if (tty) tty->flush();
970
971 if (defaultStream::instance != NULL) {
972 static char buf[4096];
973 defaultStream::instance->finish_log_on_error(buf, sizeof(buf));
974 }
975 }
976
977 bufferedStream::bufferedStream(size_t initial_size, size_t bufmax) : outputStream() {
978 buffer_length = initial_size;
979 buffer = NEW_C_HEAP_ARRAY(char, buffer_length, mtInternal);
980 buffer_pos = 0;
981 buffer_fixed = false;
982 buffer_max = bufmax;
983 }
984
985 bufferedStream::bufferedStream(char* fixed_buffer, size_t fixed_buffer_size, size_t bufmax) : outputStream() {
986 buffer_length = fixed_buffer_size;
987 buffer = fixed_buffer;
988 buffer_pos = 0;
989 buffer_fixed = true;
990 buffer_max = bufmax;
991 }
992
993 void bufferedStream::write(const char* s, size_t len) {
994
995 if(buffer_pos + len > buffer_max) {
996 flush();
997 }
998
999 size_t end = buffer_pos + len;
1000 if (end >= buffer_length) {
1001 if (buffer_fixed) {
1002 // if buffer cannot resize, silently truncate
1003 len = buffer_length - buffer_pos - 1;
1004 } else {
1005 // For small overruns, double the buffer. For larger ones,
1006 // increase to the requested size.
1007 if (end < buffer_length * 2) {
1008 end = buffer_length * 2;
1009 }
1010 buffer = REALLOC_C_HEAP_ARRAY(char, buffer, end, mtInternal);
1011 buffer_length = end;
1012 }
1013 }
1014 memcpy(buffer + buffer_pos, s, len);
1015 buffer_pos += len;
1016 update_position(s, len);
1017 }
1018
1019 char* bufferedStream::as_string() {
1020 char* copy = NEW_RESOURCE_ARRAY(char, buffer_pos+1);
1021 strncpy(copy, buffer, buffer_pos);
1022 copy[buffer_pos] = 0; // terminating null
1023 return copy;
1024 }
1025
1026 bufferedStream::~bufferedStream() {
1027 if (!buffer_fixed) {
1028 FREE_C_HEAP_ARRAY(char, buffer);
1029 }
1030 }
1031
1032 #ifndef PRODUCT
1033
1034 #if defined(SOLARIS) || defined(LINUX) || defined(AIX) || defined(_ALLBSD_SOURCE)
1035 #include <sys/types.h>
1036 #include <sys/socket.h>
1037 #include <netinet/in.h>
1038 #include <arpa/inet.h>
1039 #endif
1040
1041 // Network access
1042 networkStream::networkStream() : bufferedStream(1024*10, 1024*10) {
1043
1044 _socket = -1;
1045
1046 int result = os::socket(AF_INET, SOCK_STREAM, 0);
1047 if (result <= 0) {
1048 assert(false, "Socket could not be created!");
1049 } else {
1050 _socket = result;
1051 }
1052 }
1053
1054 int networkStream::read(char *buf, size_t len) {
1055 return os::recv(_socket, buf, (int)len, 0);
1056 }
1057
1058 void networkStream::flush() {
1059 if (size() != 0) {
1060 int result = os::raw_send(_socket, (char *)base(), size(), 0);
1061 assert(result != -1, "connection error");
1062 assert(result == (int)size(), "didn't send enough data");
1063 }
1064 reset();
1065 }
1066
1067 networkStream::~networkStream() {
1068 close();
1069 }
1070
1071 void networkStream::close() {
1072 if (_socket != -1) {
1073 flush();
1074 os::socket_close(_socket);
1075 _socket = -1;
1076 }
1077 }
1078
1079 bool networkStream::connect(const char *ip, short port) {
1080
1081 struct sockaddr_in server;
1082 server.sin_family = AF_INET;
1083 server.sin_port = htons(port);
1084
1085 server.sin_addr.s_addr = inet_addr(ip);
1086 if (server.sin_addr.s_addr == (uint32_t)-1) {
1087 struct hostent* host = os::get_host_by_name((char*)ip);
1088 if (host != NULL) {
1089 memcpy(&server.sin_addr, host->h_addr_list[0], host->h_length);
1090 } else {
1091 return false;
1092 }
1093 }
1094
1095
1096 int result = os::connect(_socket, (struct sockaddr*)&server, sizeof(struct sockaddr_in));
1097 return (result >= 0);
1098 }
1099
1100 #endif
1101
1102 void logStream::write(const char* s, size_t len) {
1103 if (len > 0 && s[len - 1] == '\n') {
1104 _current_line.write(s, len - 1);
1105 _log_func("%s", _current_line.as_string());
1106 _current_line.reset();
1107 } else {
1108 _current_line.write(s, len);
1109 }
1110 update_position(s, len);
1111 }