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