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 "oops/oop.inline.hpp"
28 #include "runtime/arguments.hpp"
29 #include "runtime/os.hpp"
30 #include "runtime/vm_version.hpp"
31 #include "utilities/defaultStream.hpp"
32 #include "utilities/macros.hpp"
33 #include "utilities/ostream.hpp"
34 #include "utilities/xmlstream.hpp"
35
36 extern "C" void jio_print(const char* s); // Declarationtion of jvm method
37
38 outputStream::outputStream(int width) {
39 _width = width;
40 _position = 0;
41 _newlines = 0;
42 _precount = 0;
43 _indentation = 0;
44 _scratch = NULL;
45 _scratch_len = 0;
46 }
47
48 outputStream::outputStream(int width, bool has_time_stamps) {
49 _width = width;
50 _position = 0;
51 _newlines = 0;
52 _precount = 0;
53 _indentation = 0;
54 _scratch = NULL;
55 _scratch_len = 0;
56 if (has_time_stamps) _stamp.update();
57 }
58
59 void outputStream::update_position(const char* s, size_t len) {
60 for (size_t i = 0; i < len; i++) {
61 char ch = s[i];
62 if (ch == '\n') {
63 _newlines += 1;
64 _precount += _position + 1;
65 _position = 0;
66 } else if (ch == '\t') {
67 int tw = 8 - (_position & 7);
68 _position += tw;
69 _precount -= tw-1; // invariant: _precount + _position == total count
70 } else {
71 _position += 1;
72 }
73 }
74 }
75
76 // Execute a vsprintf, using the given buffer if necessary.
77 // Return a pointer to the formatted string.
78 const char* outputStream::do_vsnprintf(char* buffer, size_t buflen,
79 const char* format, va_list ap,
80 bool add_cr,
81 size_t& result_len) {
82 assert(buflen >= 2, "buffer too small");
83
84 const char* result;
85 if (add_cr) buflen--;
86 if (!strchr(format, '%')) {
87 // constant format string
88 result = format;
89 result_len = strlen(result);
90 if (add_cr && result_len >= buflen) result_len = buflen-1; // truncate
91 } else if (format[0] == '%' && format[1] == 's' && format[2] == '\0') {
92 // trivial copy-through format string
93 result = va_arg(ap, const char*);
94 result_len = strlen(result);
95 if (add_cr && result_len >= buflen) result_len = buflen-1; // truncate
96 } else {
97 // Handle truncation:
98 // posix: upon truncation, vsnprintf returns number of bytes which
99 // would have been written (excluding terminating zero) had the buffer
100 // been large enough
101 // windows: upon truncation, vsnprintf returns -1
102 const int written = vsnprintf(buffer, buflen, format, ap);
103 result = buffer;
104 if (written < (int) buflen && written >= 0) {
105 result_len = written;
106 } else {
107 DEBUG_ONLY(warning("increase O_BUFLEN in ostream.hpp -- output truncated");)
108 result_len = buflen - 1;
109 buffer[result_len] = 0;
110 }
111 }
112 if (add_cr) {
113 if (result != buffer) {
114 memcpy(buffer, result, result_len);
115 result = buffer;
116 }
117 buffer[result_len++] = '\n';
118 buffer[result_len] = 0;
119 }
120 return result;
121 }
122
123 void outputStream::do_vsnprintf_and_write_with_automatic_buffer(const char* format, va_list ap, bool add_cr) {
124 char buffer[O_BUFLEN];
125 size_t len;
126 const char* str = do_vsnprintf(buffer, sizeof(buffer), format, ap, add_cr, len);
127 write(str, len);
128 }
129
130 void outputStream::do_vsnprintf_and_write_with_scratch_buffer(const char* format, va_list ap, bool add_cr) {
131 size_t len;
132 const char* str = do_vsnprintf(_scratch, _scratch_len, format, ap, add_cr, len);
133 write(str, len);
134 }
135
136 void outputStream::do_vsnprintf_and_write(const char* format, va_list ap, bool add_cr) {
137 if (_scratch) {
138 do_vsnprintf_and_write_with_scratch_buffer(format, ap, add_cr);
139 } else {
140 do_vsnprintf_and_write_with_automatic_buffer(format, ap, add_cr);
141 }
142 }
143
144 void outputStream::print(const char* format, ...) {
145 va_list ap;
146 va_start(ap, format);
147 do_vsnprintf_and_write(format, ap, false);
148 va_end(ap);
149 }
150
151 void outputStream::print_cr(const char* format, ...) {
152 va_list ap;
153 va_start(ap, format);
154 do_vsnprintf_and_write(format, ap, true);
155 va_end(ap);
156 }
157
158 void outputStream::vprint(const char *format, va_list argptr) {
159 do_vsnprintf_and_write(format, argptr, false);
160 }
161
162 void outputStream::vprint_cr(const char* format, va_list argptr) {
163 do_vsnprintf_and_write(format, argptr, true);
164 }
165
166 void outputStream::fill_to(int col) {
167 int need_fill = col - position();
168 sp(need_fill);
169 }
170
171 void outputStream::move_to(int col, int slop, int min_space) {
172 if (position() >= col + slop)
173 cr();
174 int need_fill = col - position();
175 if (need_fill < min_space)
176 need_fill = min_space;
177 sp(need_fill);
178 }
179
180 void outputStream::put(char ch) {
181 assert(ch != 0, "please fix call site");
182 char buf[] = { ch, '\0' };
183 write(buf, 1);
184 }
185
186 #define SP_USE_TABS false
187
188 void outputStream::sp(int count) {
189 if (count < 0) return;
190 if (SP_USE_TABS && count >= 8) {
191 int target = position() + count;
192 while (count >= 8) {
193 this->write("\t", 1);
194 count -= 8;
195 }
196 count = target - position();
197 }
198 while (count > 0) {
199 int nw = (count > 8) ? 8 : count;
200 this->write(" ", nw);
201 count -= nw;
202 }
203 }
204
205 void outputStream::cr() {
206 this->write("\n", 1);
207 }
208
209 void outputStream::stamp() {
210 if (! _stamp.is_updated()) {
211 _stamp.update(); // start at 0 on first call to stamp()
212 }
213
214 // outputStream::stamp() may get called by ostream_abort(), use snprintf
215 // to avoid allocating large stack buffer in print().
216 char buf[40];
217 jio_snprintf(buf, sizeof(buf), "%.3f", _stamp.seconds());
218 print_raw(buf);
219 }
220
221 void outputStream::stamp(bool guard,
222 const char* prefix,
223 const char* suffix) {
224 if (!guard) {
225 return;
226 }
227 print_raw(prefix);
228 stamp();
229 print_raw(suffix);
230 }
231
232 void outputStream::date_stamp(bool guard,
233 const char* prefix,
234 const char* suffix) {
235 if (!guard) {
236 return;
237 }
238 print_raw(prefix);
239 static const char error_time[] = "yyyy-mm-ddThh:mm:ss.mmm+zzzz";
240 static const int buffer_length = 32;
241 char buffer[buffer_length];
242 const char* iso8601_result = os::iso8601_time(buffer, buffer_length);
243 if (iso8601_result != NULL) {
244 print_raw(buffer);
245 } else {
246 print_raw(error_time);
247 }
248 print_raw(suffix);
249 return;
250 }
251
252 outputStream& outputStream::indent() {
253 while (_position < _indentation) sp();
254 return *this;
255 }
256
257 void outputStream::print_jlong(jlong value) {
258 print(JLONG_FORMAT, value);
259 }
260
261 void outputStream::print_julong(julong value) {
262 print(JULONG_FORMAT, value);
263 }
264
265 /**
266 * This prints out hex data in a 'windbg' or 'xxd' form, where each line is:
267 * <hex-address>: 8 * <hex-halfword> <ascii translation (optional)>
268 * example:
269 * 0000000: 7f44 4f46 0102 0102 0000 0000 0000 0000 .DOF............
270 * 0000010: 0000 0000 0000 0040 0000 0020 0000 0005 .......@... ....
271 * 0000020: 0000 0000 0000 0040 0000 0000 0000 015d .......@.......]
272 * ...
273 *
274 * indent is applied to each line. Ends with a CR.
275 */
276 void outputStream::print_data(void* data, size_t len, bool with_ascii) {
277 size_t limit = (len + 16) / 16 * 16;
278 for (size_t i = 0; i < limit; ++i) {
279 if (i % 16 == 0) {
280 indent().print(INTPTR_FORMAT_W(07) ":", i);
281 }
282 if (i % 2 == 0) {
283 print(" ");
284 }
285 if (i < len) {
286 print("%02x", ((unsigned char*)data)[i]);
287 } else {
288 print(" ");
289 }
290 if ((i + 1) % 16 == 0) {
291 if (with_ascii) {
292 print(" ");
293 for (size_t j = 0; j < 16; ++j) {
294 size_t idx = i + j - 15;
295 if (idx < len) {
296 char c = ((char*)data)[idx];
297 print("%c", c >= 32 && c <= 126 ? c : '.');
298 }
299 }
300 }
301 cr();
302 }
303 }
304 }
305
306 stringStream::stringStream(size_t initial_size) : outputStream() {
307 buffer_length = initial_size;
308 buffer = NEW_RESOURCE_ARRAY(char, buffer_length);
309 buffer_pos = 0;
310 buffer_fixed = false;
311 DEBUG_ONLY(rm = Thread::current()->current_resource_mark();)
312 }
313
314 // useful for output to fixed chunks of memory, such as performance counters
315 stringStream::stringStream(char* fixed_buffer, size_t fixed_buffer_size) : outputStream() {
316 buffer_length = fixed_buffer_size;
317 buffer = fixed_buffer;
318 buffer_pos = 0;
319 buffer_fixed = true;
320 }
321
322 void stringStream::write(const char* s, size_t len) {
323 size_t write_len = len; // number of non-null bytes to write
324 size_t end = buffer_pos + len + 1; // position after write and final '\0'
325 if (end > buffer_length) {
326 if (buffer_fixed) {
327 // if buffer cannot resize, silently truncate
328 end = buffer_length;
329 write_len = end - buffer_pos - 1; // leave room for the final '\0'
330 } else {
331 // For small overruns, double the buffer. For larger ones,
332 // increase to the requested size.
333 if (end < buffer_length * 2) {
334 end = buffer_length * 2;
335 }
336 char* oldbuf = buffer;
337 assert(rm == NULL || Thread::current()->current_resource_mark() == rm,
338 "StringStream is re-allocated with a different ResourceMark. Current: "
339 PTR_FORMAT " original: " PTR_FORMAT,
340 p2i(Thread::current()->current_resource_mark()), p2i(rm));
341 buffer = NEW_RESOURCE_ARRAY(char, end);
342 if (buffer_pos > 0) {
343 memcpy(buffer, oldbuf, buffer_pos);
344 }
345 buffer_length = end;
346 }
347 }
348 // invariant: buffer is always null-terminated
349 guarantee(buffer_pos + write_len + 1 <= buffer_length, "stringStream oob");
350 if (write_len > 0) {
351 buffer[buffer_pos + write_len] = 0;
352 memcpy(buffer + buffer_pos, s, write_len);
353 buffer_pos += write_len;
354 }
355
356 // Note that the following does not depend on write_len.
357 // This means that position and count get updated
358 // even when overflow occurs.
359 update_position(s, len);
360 }
361
362 char* stringStream::as_string() {
363 char* copy = NEW_RESOURCE_ARRAY(char, buffer_pos + 1);
364 strncpy(copy, buffer, buffer_pos);
365 copy[buffer_pos] = 0; // terminating null
366 return copy;
367 }
368
369 stringStream::~stringStream() {}
370
371 xmlStream* xtty;
372 outputStream* tty;
373 CDS_ONLY(fileStream* classlist_file;) // Only dump the classes that can be stored into the CDS archive
374 extern Mutex* tty_lock;
375
376 #define EXTRACHARLEN 32
377 #define CURRENTAPPX ".current"
378 // convert YYYY-MM-DD HH:MM:SS to YYYY-MM-DD_HH-MM-SS
379 char* get_datetime_string(char *buf, size_t len) {
380 os::local_time_string(buf, len);
381 int i = (int)strlen(buf);
382 while (--i >= 0) {
383 if (buf[i] == ' ') buf[i] = '_';
384 else if (buf[i] == ':') buf[i] = '-';
385 }
386 return buf;
387 }
388
389 static const char* make_log_name_internal(const char* log_name, const char* force_directory,
390 int pid, const char* tms) {
391 const char* basename = log_name;
392 char file_sep = os::file_separator()[0];
393 const char* cp;
394 char pid_text[32];
395
396 for (cp = log_name; *cp != '\0'; cp++) {
397 if (*cp == '/' || *cp == file_sep) {
398 basename = cp + 1;
399 }
400 }
401 const char* nametail = log_name;
402 // Compute buffer length
403 size_t buffer_length;
404 if (force_directory != NULL) {
405 buffer_length = strlen(force_directory) + strlen(os::file_separator()) +
406 strlen(basename) + 1;
407 } else {
408 buffer_length = strlen(log_name) + 1;
409 }
410
411 const char* pts = strstr(basename, "%p");
412 int pid_pos = (pts == NULL) ? -1 : (pts - nametail);
413
414 if (pid_pos >= 0) {
415 jio_snprintf(pid_text, sizeof(pid_text), "pid%u", pid);
416 buffer_length += strlen(pid_text);
417 }
418
419 pts = strstr(basename, "%t");
420 int tms_pos = (pts == NULL) ? -1 : (pts - nametail);
421 if (tms_pos >= 0) {
422 buffer_length += strlen(tms);
423 }
424
425 // File name is too long.
426 if (buffer_length > JVM_MAXPATHLEN) {
427 return NULL;
428 }
429
430 // Create big enough buffer.
431 char *buf = NEW_C_HEAP_ARRAY(char, buffer_length, mtInternal);
432
433 strcpy(buf, "");
434 if (force_directory != NULL) {
435 strcat(buf, force_directory);
436 strcat(buf, os::file_separator());
437 nametail = basename; // completely skip directory prefix
438 }
439
440 // who is first, %p or %t?
441 int first = -1, second = -1;
442 const char *p1st = NULL;
443 const char *p2nd = NULL;
444
445 if (pid_pos >= 0 && tms_pos >= 0) {
446 // contains both %p and %t
447 if (pid_pos < tms_pos) {
448 // case foo%pbar%tmonkey.log
449 first = pid_pos;
450 p1st = pid_text;
451 second = tms_pos;
452 p2nd = tms;
453 } else {
454 // case foo%tbar%pmonkey.log
455 first = tms_pos;
456 p1st = tms;
457 second = pid_pos;
458 p2nd = pid_text;
459 }
460 } else if (pid_pos >= 0) {
461 // contains %p only
462 first = pid_pos;
463 p1st = pid_text;
464 } else if (tms_pos >= 0) {
465 // contains %t only
466 first = tms_pos;
467 p1st = tms;
468 }
469
470 int buf_pos = (int)strlen(buf);
471 const char* tail = nametail;
472
473 if (first >= 0) {
474 tail = nametail + first + 2;
475 strncpy(&buf[buf_pos], nametail, first);
476 strcpy(&buf[buf_pos + first], p1st);
477 buf_pos = (int)strlen(buf);
478 if (second >= 0) {
479 strncpy(&buf[buf_pos], tail, second - first - 2);
480 strcpy(&buf[buf_pos + second - first - 2], p2nd);
481 tail = nametail + second + 2;
482 }
483 }
484 strcat(buf, tail); // append rest of name, or all of name
485 return buf;
486 }
487
488 // log_name comes from -XX:LogFile=log_name or
489 // -XX:DumpLoadedClassList=<file_name>
490 // in log_name, %p => pid1234 and
491 // %t => YYYY-MM-DD_HH-MM-SS
492 static const char* make_log_name(const char* log_name, const char* force_directory) {
493 char timestr[32];
494 get_datetime_string(timestr, sizeof(timestr));
495 return make_log_name_internal(log_name, force_directory, os::current_process_id(),
496 timestr);
497 }
498
499 fileStream::fileStream(const char* file_name) {
500 _file = fopen(file_name, "w");
501 if (_file != NULL) {
502 _need_close = true;
503 } else {
504 warning("Cannot open file %s due to %s\n", file_name, os::strerror(errno));
505 _need_close = false;
506 }
507 }
508
509 fileStream::fileStream(const char* file_name, const char* opentype) {
510 _file = fopen(file_name, opentype);
511 if (_file != NULL) {
512 _need_close = true;
513 } else {
514 warning("Cannot open file %s due to %s\n", file_name, os::strerror(errno));
515 _need_close = false;
516 }
517 }
518
519 void fileStream::write(const char* s, size_t len) {
520 if (_file != NULL) {
521 // Make an unused local variable to avoid warning from gcc 4.x compiler.
522 size_t count = fwrite(s, 1, len, _file);
523 }
524 update_position(s, len);
525 }
526
527 long fileStream::fileSize() {
528 long size = -1;
529 if (_file != NULL) {
530 long pos = ::ftell(_file);
531 if (::fseek(_file, 0, SEEK_END) == 0) {
532 size = ::ftell(_file);
533 }
534 ::fseek(_file, pos, SEEK_SET);
535 }
536 return size;
537 }
538
539 char* fileStream::readln(char *data, int count ) {
540 char * ret = ::fgets(data, count, _file);
541 //Get rid of annoying \n char
542 data[::strlen(data)-1] = '\0';
543 return ret;
544 }
545
546 fileStream::~fileStream() {
547 if (_file != NULL) {
548 if (_need_close) fclose(_file);
549 _file = NULL;
550 }
551 }
552
553 void fileStream::flush() {
554 fflush(_file);
555 }
556
557 fdStream::fdStream(const char* file_name) {
558 _fd = open(file_name, O_WRONLY | O_CREAT | O_TRUNC, 0666);
559 _need_close = true;
560 }
561
562 fdStream::~fdStream() {
563 if (_fd != -1) {
564 if (_need_close) close(_fd);
565 _fd = -1;
566 }
567 }
568
569 void fdStream::write(const char* s, size_t len) {
570 if (_fd != -1) {
571 // Make an unused local variable to avoid warning from gcc 4.x compiler.
572 size_t count = ::write(_fd, s, (int)len);
573 }
574 update_position(s, len);
575 }
576
577 defaultStream* defaultStream::instance = NULL;
578 int defaultStream::_output_fd = 1;
579 int defaultStream::_error_fd = 2;
580 FILE* defaultStream::_output_stream = stdout;
581 FILE* defaultStream::_error_stream = stderr;
582
583 #define LOG_MAJOR_VERSION 160
584 #define LOG_MINOR_VERSION 1
585
586 void defaultStream::init() {
587 _inited = true;
588 if (LogVMOutput || LogCompilation) {
589 init_log();
590 }
591 }
592
593 bool defaultStream::has_log_file() {
594 // lazily create log file (at startup, LogVMOutput is false even
595 // if +LogVMOutput is used, because the flags haven't been parsed yet)
596 // For safer printing during fatal error handling, do not init logfile
597 // if a VM error has been reported.
598 if (!_inited && !is_error_reported()) init();
599 return _log_file != NULL;
600 }
601
602 fileStream* defaultStream::open_file(const char* log_name) {
603 const char* try_name = make_log_name(log_name, NULL);
604 if (try_name == NULL) {
605 warning("Cannot open file %s: file name is too long.\n", log_name);
606 return NULL;
607 }
608
609 fileStream* file = new(ResourceObj::C_HEAP, mtInternal) fileStream(try_name);
610 FREE_C_HEAP_ARRAY(char, try_name);
611 if (file->is_open()) {
612 return file;
613 }
614
615 // Try again to open the file in the temp directory.
616 delete file;
617 char warnbuf[O_BUFLEN*2];
618 jio_snprintf(warnbuf, sizeof(warnbuf), "Warning: Cannot open log file: %s\n", log_name);
619 // Note: This feature is for maintainer use only. No need for L10N.
620 jio_print(warnbuf);
621 try_name = make_log_name(log_name, os::get_temp_directory());
622 if (try_name == NULL) {
623 warning("Cannot open file %s: file name is too long for directory %s.\n", log_name, os::get_temp_directory());
624 return NULL;
625 }
626
627 jio_snprintf(warnbuf, sizeof(warnbuf),
628 "Warning: Forcing option -XX:LogFile=%s\n", try_name);
629 jio_print(warnbuf);
630
631 file = new(ResourceObj::C_HEAP, mtInternal) fileStream(try_name);
632 FREE_C_HEAP_ARRAY(char, try_name);
633 if (file->is_open()) {
634 return file;
635 }
636
637 delete file;
638 return NULL;
639 }
640
641 void defaultStream::init_log() {
642 // %%% Need a MutexLocker?
643 const char* log_name = LogFile != NULL ? LogFile : "hotspot_%p.log";
644 fileStream* file = open_file(log_name);
645
646 if (file != NULL) {
647 _log_file = file;
648 _outer_xmlStream = new(ResourceObj::C_HEAP, mtInternal) xmlStream(file);
649 start_log();
650 } else {
651 // and leave xtty as NULL
652 LogVMOutput = false;
653 DisplayVMOutput = true;
654 LogCompilation = false;
655 }
656 }
657
658 void defaultStream::start_log() {
659 xmlStream*xs = _outer_xmlStream;
660 if (this == tty) xtty = xs;
661 // Write XML header.
662 xs->print_cr("<?xml version='1.0' encoding='UTF-8'?>");
663 // (For now, don't bother to issue a DTD for this private format.)
664 jlong time_ms = os::javaTimeMillis() - tty->time_stamp().milliseconds();
665 // %%% Should be: jlong time_ms = os::start_time_milliseconds(), if
666 // we ever get round to introduce that method on the os class
667 xs->head("hotspot_log version='%d %d'"
668 " process='%d' time_ms='" INT64_FORMAT "'",
669 LOG_MAJOR_VERSION, LOG_MINOR_VERSION,
670 os::current_process_id(), (int64_t)time_ms);
671 // Write VM version header immediately.
672 xs->head("vm_version");
673 xs->head("name"); xs->text("%s", VM_Version::vm_name()); xs->cr();
674 xs->tail("name");
675 xs->head("release"); xs->text("%s", VM_Version::vm_release()); xs->cr();
676 xs->tail("release");
677 xs->head("info"); xs->text("%s", VM_Version::internal_vm_info_string()); xs->cr();
678 xs->tail("info");
679 xs->tail("vm_version");
680 // Record information about the command-line invocation.
681 xs->head("vm_arguments"); // Cf. Arguments::print_on()
682 if (Arguments::num_jvm_flags() > 0) {
683 xs->head("flags");
684 Arguments::print_jvm_flags_on(xs->text());
685 xs->tail("flags");
686 }
687 if (Arguments::num_jvm_args() > 0) {
688 xs->head("args");
689 Arguments::print_jvm_args_on(xs->text());
690 xs->tail("args");
691 }
692 if (Arguments::java_command() != NULL) {
693 xs->head("command"); xs->text()->print_cr("%s", Arguments::java_command());
694 xs->tail("command");
695 }
696 if (Arguments::sun_java_launcher() != NULL) {
697 xs->head("launcher"); xs->text()->print_cr("%s", Arguments::sun_java_launcher());
698 xs->tail("launcher");
699 }
700 if (Arguments::system_properties() != NULL) {
701 xs->head("properties");
702 // Print it as a java-style property list.
703 // System properties don't generally contain newlines, so don't bother with unparsing.
704 outputStream *text = xs->text();
705 for (SystemProperty* p = Arguments::system_properties(); p != NULL; p = p->next()) {
706 assert(p->key() != NULL, "p->key() is NULL");
707 if (p->is_readable()) {
708 // Print in two stages to avoid problems with long
709 // keys/values.
710 text->print_raw(p->key());
711 text->put('=');
712 assert(p->value() != NULL, "p->value() is NULL");
713 text->print_raw_cr(p->value());
714 }
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