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