1 /*
2 * Copyright (c) 1997, 2017, 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 "prims/jvm.h"
29 #include "runtime/arguments.hpp"
30 #include "runtime/os.hpp"
31 #include "runtime/vm_version.hpp"
32 #include "utilities/defaultStream.hpp"
33 #include "utilities/macros.hpp"
34 #include "utilities/ostream.hpp"
35 #include "utilities/vmError.hpp"
36 #include "utilities/xmlstream.hpp"
37
38 extern "C" void jio_print(const char* s); // Declarationtion of jvm method
39
40 outputStream::outputStream(int width) {
41 _width = width;
42 _position = 0;
43 _newlines = 0;
44 _precount = 0;
45 _indentation = 0;
46 _scratch = NULL;
47 _scratch_len = 0;
48 }
49
50 outputStream::outputStream(int width, bool has_time_stamps) {
51 _width = width;
52 _position = 0;
53 _newlines = 0;
54 _precount = 0;
55 _indentation = 0;
56 _scratch = NULL;
57 _scratch_len = 0;
58 if (has_time_stamps) _stamp.update();
59 }
60
61 void outputStream::update_position(const char* s, size_t len) {
62 for (size_t i = 0; i < len; i++) {
63 char ch = s[i];
64 if (ch == '\n') {
65 _newlines += 1;
66 _precount += _position + 1;
67 _position = 0;
68 } else if (ch == '\t') {
69 int tw = 8 - (_position & 7);
70 _position += tw;
71 _precount -= tw-1; // invariant: _precount + _position == total count
72 } else {
73 _position += 1;
74 }
75 }
76 }
77
78 // Execute a vsprintf, using the given buffer if necessary.
79 // Return a pointer to the formatted string.
80 const char* outputStream::do_vsnprintf(char* buffer, size_t buflen,
81 const char* format, va_list ap,
82 bool add_cr,
83 size_t& result_len) {
84 assert(buflen >= 2, "buffer too small");
85
86 const char* result;
87 if (add_cr) buflen--;
88 if (!strchr(format, '%')) {
89 // constant format string
90 result = format;
91 result_len = strlen(result);
92 if (add_cr && result_len >= buflen) result_len = buflen-1; // truncate
93 } else if (format[0] == '%' && format[1] == 's' && format[2] == '\0') {
94 // trivial copy-through format string
95 result = va_arg(ap, const char*);
96 result_len = strlen(result);
97 if (add_cr && result_len >= buflen) result_len = buflen-1; // truncate
98 } else {
99 // Handle truncation:
100 // posix: upon truncation, vsnprintf returns number of bytes which
101 // would have been written (excluding terminating zero) had the buffer
102 // been large enough
103 // windows: upon truncation, vsnprintf returns -1
104 const int written = vsnprintf(buffer, buflen, format, ap);
105 result = buffer;
106 if (written < (int) buflen && written >= 0) {
107 result_len = written;
108 } else {
109 DEBUG_ONLY(warning("increase O_BUFLEN in ostream.hpp -- output truncated");)
110 result_len = buflen - 1;
111 buffer[result_len] = 0;
112 }
113 }
114 if (add_cr) {
115 if (result != buffer) {
116 memcpy(buffer, result, result_len);
117 result = buffer;
118 }
119 buffer[result_len++] = '\n';
120 buffer[result_len] = 0;
121 }
122 return result;
123 }
124
125 void outputStream::do_vsnprintf_and_write_with_automatic_buffer(const char* format, va_list ap, bool add_cr) {
126 char buffer[O_BUFLEN];
127 size_t len;
128 const char* str = do_vsnprintf(buffer, sizeof(buffer), format, ap, add_cr, len);
129 write(str, len);
130 }
131
132 void outputStream::do_vsnprintf_and_write_with_scratch_buffer(const char* format, va_list ap, bool add_cr) {
133 size_t len;
134 const char* str = do_vsnprintf(_scratch, _scratch_len, format, ap, add_cr, len);
135 write(str, len);
136 }
137
138 void outputStream::do_vsnprintf_and_write(const char* format, va_list ap, bool add_cr) {
139 if (_scratch) {
140 do_vsnprintf_and_write_with_scratch_buffer(format, ap, add_cr);
141 } else {
142 do_vsnprintf_and_write_with_automatic_buffer(format, ap, add_cr);
143 }
144 }
145
146 void outputStream::print(const char* format, ...) {
147 va_list ap;
148 va_start(ap, format);
149 do_vsnprintf_and_write(format, ap, false);
150 va_end(ap);
151 }
152
153 void outputStream::print_cr(const char* format, ...) {
154 va_list ap;
155 va_start(ap, format);
156 do_vsnprintf_and_write(format, ap, true);
157 va_end(ap);
158 }
159
160 void outputStream::vprint(const char *format, va_list argptr) {
161 do_vsnprintf_and_write(format, argptr, false);
162 }
163
164 void outputStream::vprint_cr(const char* format, va_list argptr) {
165 do_vsnprintf_and_write(format, argptr, true);
166 }
167
168 void outputStream::fill_to(int col) {
169 int need_fill = col - position();
170 sp(need_fill);
171 }
172
173 void outputStream::move_to(int col, int slop, int min_space) {
174 if (position() >= col + slop)
175 cr();
176 int need_fill = col - position();
177 if (need_fill < min_space)
178 need_fill = min_space;
179 sp(need_fill);
180 }
181
182 void outputStream::put(char ch) {
183 assert(ch != 0, "please fix call site");
184 char buf[] = { ch, '\0' };
185 write(buf, 1);
186 }
187
188 #define SP_USE_TABS false
189
190 void outputStream::sp(int count) {
191 if (count < 0) return;
192 if (SP_USE_TABS && count >= 8) {
193 int target = position() + count;
194 while (count >= 8) {
195 this->write("\t", 1);
196 count -= 8;
197 }
198 count = target - position();
199 }
200 while (count > 0) {
201 int nw = (count > 8) ? 8 : count;
202 this->write(" ", nw);
203 count -= nw;
204 }
205 }
206
207 void outputStream::cr() {
208 this->write("\n", 1);
209 }
210
211 void outputStream::stamp() {
212 if (! _stamp.is_updated()) {
213 _stamp.update(); // start at 0 on first call to stamp()
214 }
215
216 // outputStream::stamp() may get called by ostream_abort(), use snprintf
217 // to avoid allocating large stack buffer in print().
218 char buf[40];
219 jio_snprintf(buf, sizeof(buf), "%.3f", _stamp.seconds());
220 print_raw(buf);
221 }
222
223 void outputStream::stamp(bool guard,
224 const char* prefix,
225 const char* suffix) {
226 if (!guard) {
227 return;
228 }
229 print_raw(prefix);
230 stamp();
231 print_raw(suffix);
232 }
233
234 void outputStream::date_stamp(bool guard,
235 const char* prefix,
236 const char* suffix) {
237 if (!guard) {
238 return;
239 }
240 print_raw(prefix);
241 static const char error_time[] = "yyyy-mm-ddThh:mm:ss.mmm+zzzz";
242 static const int buffer_length = 32;
243 char buffer[buffer_length];
244 const char* iso8601_result = os::iso8601_time(buffer, buffer_length);
245 if (iso8601_result != NULL) {
246 print_raw(buffer);
247 } else {
248 print_raw(error_time);
249 }
250 print_raw(suffix);
251 return;
252 }
253
254 outputStream& outputStream::indent() {
255 while (_position < _indentation) sp();
256 return *this;
257 }
258
259 void outputStream::print_jlong(jlong value) {
260 print(JLONG_FORMAT, value);
261 }
262
263 void outputStream::print_julong(julong value) {
264 print(JULONG_FORMAT, value);
265 }
266
267 /**
268 * This prints out hex data in a 'windbg' or 'xxd' form, where each line is:
269 * <hex-address>: 8 * <hex-halfword> <ascii translation (optional)>
270 * example:
271 * 0000000: 7f44 4f46 0102 0102 0000 0000 0000 0000 .DOF............
272 * 0000010: 0000 0000 0000 0040 0000 0020 0000 0005 .......@... ....
273 * 0000020: 0000 0000 0000 0040 0000 0000 0000 015d .......@.......]
274 * ...
275 *
276 * indent is applied to each line. Ends with a CR.
277 */
278 void outputStream::print_data(void* data, size_t len, bool with_ascii) {
279 size_t limit = (len + 16) / 16 * 16;
280 for (size_t i = 0; i < limit; ++i) {
281 if (i % 16 == 0) {
282 indent().print(INTPTR_FORMAT_W(07) ":", i);
283 }
284 if (i % 2 == 0) {
285 print(" ");
286 }
287 if (i < len) {
288 print("%02x", ((unsigned char*)data)[i]);
289 } else {
290 print(" ");
291 }
292 if ((i + 1) % 16 == 0) {
293 if (with_ascii) {
294 print(" ");
295 for (size_t j = 0; j < 16; ++j) {
296 size_t idx = i + j - 15;
297 if (idx < len) {
298 char c = ((char*)data)[idx];
299 print("%c", c >= 32 && c <= 126 ? c : '.');
300 }
301 }
302 }
303 cr();
304 }
305 }
306 }
307
308 stringStream::stringStream(size_t initial_size) : outputStream() {
309 buffer_length = initial_size;
310 buffer = NEW_RESOURCE_ARRAY(char, buffer_length);
311 buffer_pos = 0;
312 buffer_fixed = false;
313 DEBUG_ONLY(rm = Thread::current()->current_resource_mark();)
314 }
315
316 // useful for output to fixed chunks of memory, such as performance counters
317 stringStream::stringStream(char* fixed_buffer, size_t fixed_buffer_size) : outputStream() {
318 buffer_length = fixed_buffer_size;
319 buffer = fixed_buffer;
320 buffer_pos = 0;
321 buffer_fixed = true;
322 }
323
324 void stringStream::write(const char* s, size_t len) {
325 size_t write_len = len; // number of non-null bytes to write
326 size_t end = buffer_pos + len + 1; // position after write and final '\0'
327 if (end > buffer_length) {
328 if (buffer_fixed) {
329 // if buffer cannot resize, silently truncate
330 end = buffer_length;
331 write_len = end - buffer_pos - 1; // leave room for the final '\0'
332 } else {
333 // For small overruns, double the buffer. For larger ones,
334 // increase to the requested size.
335 if (end < buffer_length * 2) {
336 end = buffer_length * 2;
337 }
338 char* oldbuf = buffer;
339 assert(rm == NULL || Thread::current()->current_resource_mark() == rm,
340 "StringStream is re-allocated with a different ResourceMark. Current: "
341 PTR_FORMAT " original: " PTR_FORMAT,
342 p2i(Thread::current()->current_resource_mark()), p2i(rm));
343 buffer = NEW_RESOURCE_ARRAY(char, end);
344 if (buffer_pos > 0) {
345 memcpy(buffer, oldbuf, buffer_pos);
346 }
347 buffer_length = end;
348 }
349 }
350 // invariant: buffer is always null-terminated
351 guarantee(buffer_pos + write_len + 1 <= buffer_length, "stringStream oob");
352 if (write_len > 0) {
353 buffer[buffer_pos + write_len] = 0;
354 memcpy(buffer + buffer_pos, s, write_len);
355 buffer_pos += write_len;
356 }
357
358 // Note that the following does not depend on write_len.
359 // This means that position and count get updated
360 // even when overflow occurs.
361 update_position(s, len);
362 }
363
364 char* stringStream::as_string() {
365 char* copy = NEW_RESOURCE_ARRAY(char, buffer_pos + 1);
366 strncpy(copy, buffer, buffer_pos);
367 copy[buffer_pos] = 0; // terminating null
368 return copy;
369 }
370
371 stringStream::~stringStream() {}
372
373 xmlStream* xtty;
374 outputStream* tty;
375 CDS_ONLY(fileStream* classlist_file;) // Only dump the classes that can be stored into the CDS archive
376 extern Mutex* tty_lock;
377
378 #define EXTRACHARLEN 32
379 #define CURRENTAPPX ".current"
380 // convert YYYY-MM-DD HH:MM:SS to YYYY-MM-DD_HH-MM-SS
381 char* get_datetime_string(char *buf, size_t len) {
382 os::local_time_string(buf, len);
383 int i = (int)strlen(buf);
384 while (--i >= 0) {
385 if (buf[i] == ' ') buf[i] = '_';
386 else if (buf[i] == ':') buf[i] = '-';
387 }
388 return buf;
389 }
390
391 static const char* make_log_name_internal(const char* log_name, const char* force_directory,
392 int pid, const char* tms) {
393 const char* basename = log_name;
394 char file_sep = os::file_separator()[0];
395 const char* cp;
396 char pid_text[32];
397
398 for (cp = log_name; *cp != '\0'; cp++) {
399 if (*cp == '/' || *cp == file_sep) {
400 basename = cp + 1;
401 }
402 }
403 const char* nametail = log_name;
404 // Compute buffer length
405 size_t buffer_length;
406 if (force_directory != NULL) {
407 buffer_length = strlen(force_directory) + strlen(os::file_separator()) +
408 strlen(basename) + 1;
409 } else {
410 buffer_length = strlen(log_name) + 1;
411 }
412
413 const char* pts = strstr(basename, "%p");
414 int pid_pos = (pts == NULL) ? -1 : (pts - nametail);
415
416 if (pid_pos >= 0) {
417 jio_snprintf(pid_text, sizeof(pid_text), "pid%u", pid);
418 buffer_length += strlen(pid_text);
419 }
420
421 pts = strstr(basename, "%t");
422 int tms_pos = (pts == NULL) ? -1 : (pts - nametail);
423 if (tms_pos >= 0) {
424 buffer_length += strlen(tms);
425 }
426
427 // File name is too long.
428 if (buffer_length > JVM_MAXPATHLEN) {
429 return NULL;
430 }
431
432 // Create big enough buffer.
433 char *buf = NEW_C_HEAP_ARRAY(char, buffer_length, mtInternal);
434
435 strcpy(buf, "");
436 if (force_directory != NULL) {
437 strcat(buf, force_directory);
438 strcat(buf, os::file_separator());
439 nametail = basename; // completely skip directory prefix
440 }
441
442 // who is first, %p or %t?
443 int first = -1, second = -1;
444 const char *p1st = NULL;
445 const char *p2nd = NULL;
446
447 if (pid_pos >= 0 && tms_pos >= 0) {
448 // contains both %p and %t
449 if (pid_pos < tms_pos) {
450 // case foo%pbar%tmonkey.log
451 first = pid_pos;
452 p1st = pid_text;
453 second = tms_pos;
454 p2nd = tms;
455 } else {
456 // case foo%tbar%pmonkey.log
457 first = tms_pos;
458 p1st = tms;
459 second = pid_pos;
460 p2nd = pid_text;
461 }
462 } else if (pid_pos >= 0) {
463 // contains %p only
464 first = pid_pos;
465 p1st = pid_text;
466 } else if (tms_pos >= 0) {
467 // contains %t only
468 first = tms_pos;
469 p1st = tms;
470 }
471
472 int buf_pos = (int)strlen(buf);
473 const char* tail = nametail;
474
475 if (first >= 0) {
476 tail = nametail + first + 2;
477 strncpy(&buf[buf_pos], nametail, first);
478 strcpy(&buf[buf_pos + first], p1st);
479 buf_pos = (int)strlen(buf);
480 if (second >= 0) {
481 strncpy(&buf[buf_pos], tail, second - first - 2);
482 strcpy(&buf[buf_pos + second - first - 2], p2nd);
483 tail = nametail + second + 2;
484 }
485 }
486 strcat(buf, tail); // append rest of name, or all of name
487 return buf;
488 }
489
490 // log_name comes from -XX:LogFile=log_name or
491 // -XX:DumpLoadedClassList=<file_name>
492 // in log_name, %p => pid1234 and
493 // %t => YYYY-MM-DD_HH-MM-SS
494 static const char* make_log_name(const char* log_name, const char* force_directory) {
495 char timestr[32];
496 get_datetime_string(timestr, sizeof(timestr));
497 return make_log_name_internal(log_name, force_directory, os::current_process_id(),
498 timestr);
499 }
500
501 fileStream::fileStream(const char* file_name) {
502 _file = fopen(file_name, "w");
503 if (_file != NULL) {
504 _need_close = true;
505 } else {
506 warning("Cannot open file %s due to %s\n", file_name, os::strerror(errno));
507 _need_close = false;
508 }
509 }
510
511 fileStream::fileStream(const char* file_name, const char* opentype) {
512 _file = fopen(file_name, opentype);
513 if (_file != NULL) {
514 _need_close = true;
515 } else {
516 warning("Cannot open file %s due to %s\n", file_name, os::strerror(errno));
517 _need_close = false;
518 }
519 }
520
521 void fileStream::write(const char* s, size_t len) {
522 if (_file != NULL) {
523 // Make an unused local variable to avoid warning from gcc 4.x compiler.
524 size_t count = fwrite(s, 1, len, _file);
525 }
526 update_position(s, len);
527 }
528
529 long fileStream::fileSize() {
530 long size = -1;
531 if (_file != NULL) {
532 long pos = ::ftell(_file);
533 if (::fseek(_file, 0, SEEK_END) == 0) {
534 size = ::ftell(_file);
535 }
536 ::fseek(_file, pos, SEEK_SET);
537 }
538 return size;
539 }
540
541 char* fileStream::readln(char *data, int count ) {
542 char * ret = ::fgets(data, count, _file);
543 //Get rid of annoying \n char
544 data[::strlen(data)-1] = '\0';
545 return ret;
546 }
547
548 fileStream::~fileStream() {
549 if (_file != NULL) {
550 if (_need_close) fclose(_file);
551 _file = NULL;
552 }
553 }
554
555 void fileStream::flush() {
556 fflush(_file);
557 }
558
559 fdStream::fdStream(const char* file_name) {
560 _fd = open(file_name, O_WRONLY | O_CREAT | O_TRUNC, 0666);
561 _need_close = true;
562 }
563
564 fdStream::~fdStream() {
565 if (_fd != -1) {
566 if (_need_close) close(_fd);
567 _fd = -1;
568 }
569 }
570
571 void fdStream::write(const char* s, size_t len) {
572 if (_fd != -1) {
573 // Make an unused local variable to avoid warning from gcc 4.x compiler.
574 size_t count = ::write(_fd, s, (int)len);
575 }
576 update_position(s, len);
577 }
578
579 defaultStream* defaultStream::instance = NULL;
580 int defaultStream::_output_fd = 1;
581 int defaultStream::_error_fd = 2;
582 FILE* defaultStream::_output_stream = stdout;
583 FILE* defaultStream::_error_stream = stderr;
584
585 #define LOG_MAJOR_VERSION 160
586 #define LOG_MINOR_VERSION 1
587
588 void defaultStream::init() {
589 _inited = true;
590 if (LogVMOutput || LogCompilation) {
591 init_log();
592 }
593 }
594
595 bool defaultStream::has_log_file() {
596 // lazily create log file (at startup, LogVMOutput is false even
597 // if +LogVMOutput is used, because the flags haven't been parsed yet)
598 // For safer printing during fatal error handling, do not init logfile
599 // if a VM error has been reported.
600 if (!_inited && !VMError::is_error_reported()) init();
601 return _log_file != NULL;
602 }
603
604 fileStream* defaultStream::open_file(const char* log_name) {
605 const char* try_name = make_log_name(log_name, NULL);
606 if (try_name == NULL) {
607 warning("Cannot open file %s: file name is too long.\n", log_name);
608 return NULL;
609 }
610
611 fileStream* file = new(ResourceObj::C_HEAP, mtInternal) fileStream(try_name);
612 FREE_C_HEAP_ARRAY(char, try_name);
613 if (file->is_open()) {
614 return file;
615 }
616
617 // Try again to open the file in the temp directory.
618 delete file;
619 char warnbuf[O_BUFLEN*2];
620 jio_snprintf(warnbuf, sizeof(warnbuf), "Warning: Cannot open log file: %s\n", log_name);
621 // Note: This feature is for maintainer use only. No need for L10N.
622 jio_print(warnbuf);
623 try_name = make_log_name(log_name, os::get_temp_directory());
624 if (try_name == NULL) {
625 warning("Cannot open file %s: file name is too long for directory %s.\n", log_name, os::get_temp_directory());
626 return NULL;
627 }
628
629 jio_snprintf(warnbuf, sizeof(warnbuf),
630 "Warning: Forcing option -XX:LogFile=%s\n", try_name);
631 jio_print(warnbuf);
632
633 file = new(ResourceObj::C_HEAP, mtInternal) fileStream(try_name);
634 FREE_C_HEAP_ARRAY(char, try_name);
635 if (file->is_open()) {
636 return file;
637 }
638
639 delete file;
640 return NULL;
641 }
642
643 void defaultStream::init_log() {
644 // %%% Need a MutexLocker?
645 const char* log_name = LogFile != NULL ? LogFile : "hotspot_%p.log";
646 fileStream* file = open_file(log_name);
647
648 if (file != NULL) {
649 _log_file = file;
650 _outer_xmlStream = new(ResourceObj::C_HEAP, mtInternal) xmlStream(file);
651 start_log();
652 } else {
653 // and leave xtty as NULL
654 LogVMOutput = false;
655 DisplayVMOutput = true;
656 LogCompilation = false;
657 }
658 }
659
660 void defaultStream::start_log() {
661 xmlStream*xs = _outer_xmlStream;
662 if (this == tty) xtty = xs;
663 // Write XML header.
664 xs->print_cr("<?xml version='1.0' encoding='UTF-8'?>");
665 // (For now, don't bother to issue a DTD for this private format.)
666 jlong time_ms = os::javaTimeMillis() - tty->time_stamp().milliseconds();
667 // %%% Should be: jlong time_ms = os::start_time_milliseconds(), if
668 // we ever get round to introduce that method on the os class
669 xs->head("hotspot_log version='%d %d'"
670 " process='%d' time_ms='" INT64_FORMAT "'",
671 LOG_MAJOR_VERSION, LOG_MINOR_VERSION,
672 os::current_process_id(), (int64_t)time_ms);
673 // Write VM version header immediately.
674 xs->head("vm_version");
675 xs->head("name"); xs->text("%s", VM_Version::vm_name()); xs->cr();
676 xs->tail("name");
677 xs->head("release"); xs->text("%s", VM_Version::vm_release()); xs->cr();
678 xs->tail("release");
679 xs->head("info"); xs->text("%s", VM_Version::internal_vm_info_string()); xs->cr();
680 xs->tail("info");
681 xs->tail("vm_version");
682 // Record information about the command-line invocation.
683 xs->head("vm_arguments"); // Cf. Arguments::print_on()
684 if (Arguments::num_jvm_flags() > 0) {
685 xs->head("flags");
686 Arguments::print_jvm_flags_on(xs->text());
687 xs->tail("flags");
688 }
689 if (Arguments::num_jvm_args() > 0) {
690 xs->head("args");
691 Arguments::print_jvm_args_on(xs->text());
692 xs->tail("args");
693 }
694 if (Arguments::java_command() != NULL) {
695 xs->head("command"); xs->text()->print_cr("%s", Arguments::java_command());
696 xs->tail("command");
697 }
698 if (Arguments::sun_java_launcher() != NULL) {
699 xs->head("launcher"); xs->text()->print_cr("%s", Arguments::sun_java_launcher());
700 xs->tail("launcher");
701 }
702 if (Arguments::system_properties() != NULL) {
703 xs->head("properties");
704 // Print it as a java-style property list.
705 // System properties don't generally contain newlines, so don't bother with unparsing.
706 outputStream *text = xs->text();
707 for (SystemProperty* p = Arguments::system_properties(); p != NULL; p = p->next()) {
708 assert(p->key() != NULL, "p->key() is NULL");
709 if (p->is_readable()) {
710 // Print in two stages to avoid problems with long
711 // keys/values.
712 text->print_raw(p->key());
713 text->put('=');
714 assert(p->value() != NULL, "p->value() is NULL");
715 text->print_raw_cr(p->value());
716 }
717 }
718 xs->tail("properties");
719 }
720 xs->tail("vm_arguments");
721 // tty output per se is grouped under the <tty>...</tty> element.
722 xs->head("tty");
723 // All further non-markup text gets copied to the tty:
724 xs->_text = this; // requires friend declaration!
725 }
726
727 // finish_log() is called during normal VM shutdown. finish_log_on_error() is
728 // called by ostream_abort() after a fatal error.
729 //
730 void defaultStream::finish_log() {
731 xmlStream* xs = _outer_xmlStream;
732 xs->done("tty");
733
734 // Other log forks are appended here, at the End of Time:
735 CompileLog::finish_log(xs->out()); // write compile logging, if any, now
736
737 xs->done("hotspot_log");
738 xs->flush();
739
740 fileStream* file = _log_file;
741 _log_file = NULL;
742
743 delete _outer_xmlStream;
744 _outer_xmlStream = NULL;
745
746 file->flush();
747 delete file;
748 }
749
750 void defaultStream::finish_log_on_error(char *buf, int buflen) {
751 xmlStream* xs = _outer_xmlStream;
752
753 if (xs && xs->out()) {
754
755 xs->done_raw("tty");
756
757 // Other log forks are appended here, at the End of Time:
758 CompileLog::finish_log_on_error(xs->out(), buf, buflen); // write compile logging, if any, now
759
760 xs->done_raw("hotspot_log");
761 xs->flush();
762
763 fileStream* file = _log_file;
764 _log_file = NULL;
765 _outer_xmlStream = NULL;
766
767 if (file) {
768 file->flush();
769
770 // Can't delete or close the file because delete and fclose aren't
771 // async-safe. We are about to die, so leave it to the kernel.
772 // delete file;
773 }
774 }
775 }
776
777 intx defaultStream::hold(intx writer_id) {
778 bool has_log = has_log_file(); // check before locking
779 if (// impossible, but who knows?
780 writer_id == NO_WRITER ||
781
782 // bootstrap problem
783 tty_lock == NULL ||
784
785 // can't grab a lock if current Thread isn't set
786 Thread::current_or_null() == NULL ||
787
788 // developer hook
789 !SerializeVMOutput ||
790
791 // VM already unhealthy
792 VMError::is_error_reported() ||
793
794 // safepoint == global lock (for VM only)
795 (SafepointSynchronize::is_synchronizing() &&
796 Thread::current()->is_VM_thread())
797 ) {
798 // do not attempt to lock unless we know the thread and the VM is healthy
799 return NO_WRITER;
800 }
801 if (_writer == writer_id) {
802 // already held, no need to re-grab the lock
803 return NO_WRITER;
804 }
805 tty_lock->lock_without_safepoint_check();
806 // got the lock
807 if (writer_id != _last_writer) {
808 if (has_log) {
809 _log_file->bol();
810 // output a hint where this output is coming from:
811 _log_file->print_cr("<writer thread='" UINTX_FORMAT "'/>", writer_id);
812 }
813 _last_writer = writer_id;
814 }
815 _writer = writer_id;
816 return writer_id;
817 }
818
819 void defaultStream::release(intx holder) {
820 if (holder == NO_WRITER) {
821 // nothing to release: either a recursive lock, or we scribbled (too bad)
822 return;
823 }
824 if (_writer != holder) {
825 return; // already unlocked, perhaps via break_tty_lock_for_safepoint
826 }
827 _writer = NO_WRITER;
828 tty_lock->unlock();
829 }
830
831
832 // Yuck: jio_print does not accept char*/len.
833 static void call_jio_print(const char* s, size_t len) {
834 char buffer[O_BUFLEN+100];
835 if (len > sizeof(buffer)-1) {
836 warning("increase O_BUFLEN in ostream.cpp -- output truncated");
837 len = sizeof(buffer)-1;
838 }
839 strncpy(buffer, s, len);
840 buffer[len] = '\0';
841 jio_print(buffer);
842 }
843
844
845 void defaultStream::write(const char* s, size_t len) {
846 intx thread_id = os::current_thread_id();
847 intx holder = hold(thread_id);
848
849 if (DisplayVMOutput &&
850 (_outer_xmlStream == NULL || !_outer_xmlStream->inside_attrs())) {
851 // print to output stream. It can be redirected by a vfprintf hook
852 if (s[len] == '\0') {
853 jio_print(s);
854 } else {
855 call_jio_print(s, len);
856 }
857 }
858
859 // print to log file
860 if (has_log_file()) {
861 int nl0 = _newlines;
862 xmlTextStream::write(s, len);
863 // flush the log file too, if there were any newlines
864 if (nl0 != _newlines){
865 flush();
866 }
867 } else {
868 update_position(s, len);
869 }
870
871 release(holder);
872 }
873
874 intx ttyLocker::hold_tty() {
875 if (defaultStream::instance == NULL) return defaultStream::NO_WRITER;
876 intx thread_id = os::current_thread_id();
877 return defaultStream::instance->hold(thread_id);
878 }
879
880 void ttyLocker::release_tty(intx holder) {
881 if (holder == defaultStream::NO_WRITER) return;
882 defaultStream::instance->release(holder);
883 }
884
885 bool ttyLocker::release_tty_if_locked() {
886 intx thread_id = os::current_thread_id();
887 if (defaultStream::instance->writer() == thread_id) {
888 // release the lock and return true so callers know if was
889 // previously held.
890 release_tty(thread_id);
891 return true;
892 }
893 return false;
894 }
895
896 void ttyLocker::break_tty_lock_for_safepoint(intx holder) {
897 if (defaultStream::instance != NULL &&
898 defaultStream::instance->writer() == holder) {
899 if (xtty != NULL) {
900 xtty->print_cr("<!-- safepoint while printing -->");
901 }
902 defaultStream::instance->release(holder);
903 }
904 // (else there was no lock to break)
905 }
906
907 void ostream_init() {
908 if (defaultStream::instance == NULL) {
909 defaultStream::instance = new(ResourceObj::C_HEAP, mtInternal) defaultStream();
910 tty = defaultStream::instance;
911
912 // We want to ensure that time stamps in GC logs consider time 0
913 // the time when the JVM is initialized, not the first time we ask
914 // for a time stamp. So, here, we explicitly update the time stamp
915 // of tty.
916 tty->time_stamp().update_to(1);
917 }
918 }
919
920 void ostream_init_log() {
921 // Note : this must be called AFTER ostream_init()
922
923 #if INCLUDE_CDS
924 // For -XX:DumpLoadedClassList=<file> option
925 if (DumpLoadedClassList != NULL) {
926 const char* list_name = make_log_name(DumpLoadedClassList, NULL);
927 classlist_file = new(ResourceObj::C_HEAP, mtInternal)
928 fileStream(list_name);
929 FREE_C_HEAP_ARRAY(char, list_name);
930 }
931 #endif
932
933 // If we haven't lazily initialized the logfile yet, do it now,
934 // to avoid the possibility of lazy initialization during a VM
935 // crash, which can affect the stability of the fatal error handler.
936 defaultStream::instance->has_log_file();
937 }
938
939 // ostream_exit() is called during normal VM exit to finish log files, flush
940 // output and free resource.
941 void ostream_exit() {
942 static bool ostream_exit_called = false;
943 if (ostream_exit_called) return;
944 ostream_exit_called = true;
945 #if INCLUDE_CDS
946 if (classlist_file != NULL) {
947 delete classlist_file;
948 }
949 #endif
950 {
951 // we temporaly disable PrintMallocFree here
952 // as otherwise it'll lead to using of almost deleted
953 // tty or defaultStream::instance in logging facility
954 // of HeapFree(), see 6391258
955 DEBUG_ONLY(FlagSetting fs(PrintMallocFree, false);)
956 if (tty != defaultStream::instance) {
957 delete tty;
958 }
959 if (defaultStream::instance != NULL) {
960 delete defaultStream::instance;
961 }
962 }
963 tty = NULL;
964 xtty = NULL;
965 defaultStream::instance = NULL;
966 }
967
968 // ostream_abort() is called by os::abort() when VM is about to die.
969 void ostream_abort() {
970 // Here we can't delete tty, just flush its output
971 if (tty) tty->flush();
972
973 if (defaultStream::instance != NULL) {
974 static char buf[4096];
975 defaultStream::instance->finish_log_on_error(buf, sizeof(buf));
976 }
977 }
978
979 bufferedStream::bufferedStream(size_t initial_size, size_t bufmax) : outputStream() {
980 buffer_length = initial_size;
981 buffer = NEW_C_HEAP_ARRAY(char, buffer_length, mtInternal);
982 buffer_pos = 0;
983 buffer_fixed = false;
984 buffer_max = bufmax;
985 }
986
987 bufferedStream::bufferedStream(char* fixed_buffer, size_t fixed_buffer_size, size_t bufmax) : outputStream() {
988 buffer_length = fixed_buffer_size;
989 buffer = fixed_buffer;
990 buffer_pos = 0;
991 buffer_fixed = true;
992 buffer_max = bufmax;
993 }
994
995 void bufferedStream::write(const char* s, size_t len) {
996
997 if(buffer_pos + len > buffer_max) {
998 flush();
999 }
1000
1001 size_t end = buffer_pos + len;
1002 if (end >= buffer_length) {
1003 if (buffer_fixed) {
1004 // if buffer cannot resize, silently truncate
1005 len = buffer_length - buffer_pos - 1;
1006 } else {
1007 // For small overruns, double the buffer. For larger ones,
1008 // increase to the requested size.
1009 if (end < buffer_length * 2) {
1010 end = buffer_length * 2;
1011 }
1012 buffer = REALLOC_C_HEAP_ARRAY(char, buffer, end, mtInternal);
1013 buffer_length = end;
1014 }
1015 }
1016 memcpy(buffer + buffer_pos, s, len);
1017 buffer_pos += len;
1018 update_position(s, len);
1019 }
1020
1021 char* bufferedStream::as_string() {
1022 char* copy = NEW_RESOURCE_ARRAY(char, buffer_pos+1);
1023 strncpy(copy, buffer, buffer_pos);
1024 copy[buffer_pos] = 0; // terminating null
1025 return copy;
1026 }
1027
1028 bufferedStream::~bufferedStream() {
1029 if (!buffer_fixed) {
1030 FREE_C_HEAP_ARRAY(char, buffer);
1031 }
1032 }
1033
1034 #ifndef PRODUCT
1035
1036 #if defined(SOLARIS) || defined(LINUX) || defined(AIX) || defined(_ALLBSD_SOURCE)
1037 #include <sys/types.h>
1038 #include <sys/socket.h>
1039 #include <netinet/in.h>
1040 #include <arpa/inet.h>
1041 #endif
1042
1043 // Network access
1044 networkStream::networkStream() : bufferedStream(1024*10, 1024*10) {
1045
1046 _socket = -1;
1047
1048 int result = os::socket(AF_INET, SOCK_STREAM, 0);
1049 if (result <= 0) {
1050 assert(false, "Socket could not be created!");
1051 } else {
1052 _socket = result;
1053 }
1054 }
1055
1056 int networkStream::read(char *buf, size_t len) {
1057 return os::recv(_socket, buf, (int)len, 0);
1058 }
1059
1060 void networkStream::flush() {
1061 if (size() != 0) {
1062 int result = os::raw_send(_socket, (char *)base(), size(), 0);
1063 assert(result != -1, "connection error");
1064 assert(result == (int)size(), "didn't send enough data");
1065 }
1066 reset();
1067 }
1068
1069 networkStream::~networkStream() {
1070 close();
1071 }
1072
1073 void networkStream::close() {
1074 if (_socket != -1) {
1075 flush();
1076 os::socket_close(_socket);
1077 _socket = -1;
1078 }
1079 }
1080
1081 bool networkStream::connect(const char *ip, short port) {
1082
1083 struct sockaddr_in server;
1084 server.sin_family = AF_INET;
1085 server.sin_port = htons(port);
1086
1087 server.sin_addr.s_addr = inet_addr(ip);
1088 if (server.sin_addr.s_addr == (uint32_t)-1) {
1089 struct hostent* host = os::get_host_by_name((char*)ip);
1090 if (host != NULL) {
1091 memcpy(&server.sin_addr, host->h_addr_list[0], host->h_length);
1092 } else {
1093 return false;
1094 }
1095 }
1096
1097
1098 int result = os::connect(_socket, (struct sockaddr*)&server, sizeof(struct sockaddr_in));
1099 return (result >= 0);
1100 }
1101
1102 #endif