1 /* 2 * Copyright (c) 1997, 2011, 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 "utilities/defaultStream.hpp" 30 #include "utilities/ostream.hpp" 31 #include "utilities/top.hpp" 32 #include "utilities/xmlstream.hpp" 33 #ifdef TARGET_OS_FAMILY_linux 34 # include "os_linux.inline.hpp" 35 #endif 36 #ifdef TARGET_OS_FAMILY_solaris 37 # include "os_solaris.inline.hpp" 38 #endif 39 #ifdef TARGET_OS_FAMILY_windows 40 # include "os_windows.inline.hpp" 41 #endif 42 #ifdef TARGET_OS_FAMILY_bsd 43 # include "os_bsd.inline.hpp" 44 #endif 45 46 extern "C" void jio_print(const char* s); // Declarationtion of jvm method 47 48 outputStream::outputStream(int width) { 49 _width = width; 50 _position = 0; 51 _newlines = 0; 52 _precount = 0; 53 _indentation = 0; 54 } 55 56 outputStream::outputStream(int width, bool has_time_stamps) { 57 _width = width; 58 _position = 0; 59 _newlines = 0; 60 _precount = 0; 61 _indentation = 0; 62 if (has_time_stamps) _stamp.update(); 63 } 64 65 void outputStream::update_position(const char* s, size_t len) { 66 for (size_t i = 0; i < len; i++) { 67 char ch = s[i]; 68 if (ch == '\n') { 69 _newlines += 1; 70 _precount += _position + 1; 71 _position = 0; 72 } else if (ch == '\t') { 73 int tw = 8 - (_position & 7); 74 _position += tw; 75 _precount -= tw-1; // invariant: _precount + _position == total count 76 } else { 77 _position += 1; 78 } 79 } 80 } 81 82 // Execute a vsprintf, using the given buffer if necessary. 83 // Return a pointer to the formatted string. 84 const char* outputStream::do_vsnprintf(char* buffer, size_t buflen, 85 const char* format, va_list ap, 86 bool add_cr, 87 size_t& result_len) { 88 const char* result; 89 if (add_cr) buflen--; 90 if (!strchr(format, '%')) { 91 // constant format string 92 result = format; 93 result_len = strlen(result); 94 if (add_cr && result_len >= buflen) result_len = buflen-1; // truncate 95 } else if (format[0] == '%' && format[1] == 's' && format[2] == '\0') { 96 // trivial copy-through format string 97 result = va_arg(ap, const char*); 98 result_len = strlen(result); 99 if (add_cr && result_len >= buflen) result_len = buflen-1; // truncate 100 } else if (vsnprintf(buffer, buflen, format, ap) >= 0) { 101 result = buffer; 102 result_len = strlen(result); 103 } else { 104 DEBUG_ONLY(warning("increase O_BUFLEN in ostream.hpp -- output truncated");) 105 result = buffer; 106 result_len = buflen - 1; 107 buffer[result_len] = 0; 108 } 109 if (add_cr) { 110 if (result != buffer) { 111 strncpy(buffer, result, buflen); 112 result = buffer; 113 } 114 buffer[result_len++] = '\n'; 115 buffer[result_len] = 0; 116 } 117 return result; 118 } 119 120 void outputStream::print(const char* format, ...) { 121 char buffer[O_BUFLEN]; 122 va_list ap; 123 va_start(ap, format); 124 size_t len; 125 const char* str = do_vsnprintf(buffer, O_BUFLEN, format, ap, false, len); 126 write(str, len); 127 va_end(ap); 128 } 129 130 void outputStream::print_cr(const char* format, ...) { 131 char buffer[O_BUFLEN]; 132 va_list ap; 133 va_start(ap, format); 134 size_t len; 135 const char* str = do_vsnprintf(buffer, O_BUFLEN, format, ap, true, len); 136 write(str, len); 137 va_end(ap); 138 } 139 140 void outputStream::vprint(const char *format, va_list argptr) { 141 char buffer[O_BUFLEN]; 142 size_t len; 143 const char* str = do_vsnprintf(buffer, O_BUFLEN, format, argptr, false, len); 144 write(str, len); 145 } 146 147 void outputStream::vprint_cr(const char* format, va_list argptr) { 148 char buffer[O_BUFLEN]; 149 size_t len; 150 const char* str = do_vsnprintf(buffer, O_BUFLEN, format, argptr, true, len); 151 write(str, len); 152 } 153 154 void outputStream::fill_to(int col) { 155 int need_fill = col - position(); 156 sp(need_fill); 157 } 158 159 void outputStream::move_to(int col, int slop, int min_space) { 160 if (position() >= col + slop) 161 cr(); 162 int need_fill = col - position(); 163 if (need_fill < min_space) 164 need_fill = min_space; 165 sp(need_fill); 166 } 167 168 void outputStream::put(char ch) { 169 assert(ch != 0, "please fix call site"); 170 char buf[] = { ch, '\0' }; 171 write(buf, 1); 172 } 173 174 #define SP_USE_TABS false 175 176 void outputStream::sp(int count) { 177 if (count < 0) return; 178 if (SP_USE_TABS && count >= 8) { 179 int target = position() + count; 180 while (count >= 8) { 181 this->write("\t", 1); 182 count -= 8; 183 } 184 count = target - position(); 185 } 186 while (count > 0) { 187 int nw = (count > 8) ? 8 : count; 188 this->write(" ", nw); 189 count -= nw; 190 } 191 } 192 193 void outputStream::cr() { 194 this->write("\n", 1); 195 } 196 197 void outputStream::stamp() { 198 if (! _stamp.is_updated()) { 199 _stamp.update(); // start at 0 on first call to stamp() 200 } 201 202 // outputStream::stamp() may get called by ostream_abort(), use snprintf 203 // to avoid allocating large stack buffer in print(). 204 char buf[40]; 205 jio_snprintf(buf, sizeof(buf), "%.3f", _stamp.seconds()); 206 print_raw(buf); 207 } 208 209 void outputStream::stamp(bool guard, 210 const char* prefix, 211 const char* suffix) { 212 if (!guard) { 213 return; 214 } 215 print_raw(prefix); 216 stamp(); 217 print_raw(suffix); 218 } 219 220 void outputStream::date_stamp(bool guard, 221 const char* prefix, 222 const char* suffix) { 223 if (!guard) { 224 return; 225 } 226 print_raw(prefix); 227 static const char error_time[] = "yyyy-mm-ddThh:mm:ss.mmm+zzzz"; 228 static const int buffer_length = 32; 229 char buffer[buffer_length]; 230 const char* iso8601_result = os::iso8601_time(buffer, buffer_length); 231 if (iso8601_result != NULL) { 232 print_raw(buffer); 233 } else { 234 print_raw(error_time); 235 } 236 print_raw(suffix); 237 return; 238 } 239 240 void outputStream::indent() { 241 while (_position < _indentation) sp(); 242 } 243 244 void outputStream::print_jlong(jlong value) { 245 // N.B. Same as INT64_FORMAT 246 print(os::jlong_format_specifier(), value); 247 } 248 249 void outputStream::print_julong(julong value) { 250 // N.B. Same as UINT64_FORMAT 251 print(os::julong_format_specifier(), value); 252 } 253 254 stringStream::stringStream(size_t initial_size) : outputStream() { 255 buffer_length = initial_size; 256 buffer = NEW_RESOURCE_ARRAY(char, buffer_length); 257 buffer_pos = 0; 258 buffer_fixed = false; 259 } 260 261 // useful for output to fixed chunks of memory, such as performance counters 262 stringStream::stringStream(char* fixed_buffer, size_t fixed_buffer_size) : outputStream() { 263 buffer_length = fixed_buffer_size; 264 buffer = fixed_buffer; 265 buffer_pos = 0; 266 buffer_fixed = true; 267 } 268 269 void stringStream::write(const char* s, size_t len) { 270 size_t write_len = len; // number of non-null bytes to write 271 size_t end = buffer_pos + len + 1; // position after write and final '\0' 272 if (end > buffer_length) { 273 if (buffer_fixed) { 274 // if buffer cannot resize, silently truncate 275 end = buffer_length; 276 write_len = end - buffer_pos - 1; // leave room for the final '\0' 277 } else { 278 // For small overruns, double the buffer. For larger ones, 279 // increase to the requested size. 280 if (end < buffer_length * 2) { 281 end = buffer_length * 2; 282 } 283 char* oldbuf = buffer; 284 buffer = NEW_RESOURCE_ARRAY(char, end); 285 strncpy(buffer, oldbuf, buffer_pos); 286 buffer_length = end; 287 } 288 } 289 // invariant: buffer is always null-terminated 290 guarantee(buffer_pos + write_len + 1 <= buffer_length, "stringStream oob"); 291 buffer[buffer_pos + write_len] = 0; 292 strncpy(buffer + buffer_pos, s, write_len); 293 buffer_pos += write_len; 294 295 // Note that the following does not depend on write_len. 296 // This means that position and count get updated 297 // even when overflow occurs. 298 update_position(s, len); 299 } 300 301 char* stringStream::as_string() { 302 char* copy = NEW_RESOURCE_ARRAY(char, buffer_pos+1); 303 strncpy(copy, buffer, buffer_pos); 304 copy[buffer_pos] = 0; // terminating null 305 return copy; 306 } 307 308 stringStream::~stringStream() {} 309 310 xmlStream* xtty; 311 outputStream* tty; 312 outputStream* gclog_or_tty; 313 extern Mutex* tty_lock; 314 315 fileStream::fileStream(const char* file_name) { 316 _file = fopen(file_name, "w"); 317 _need_close = true; 318 } 319 320 fileStream::fileStream(const char* file_name, const char* opentype) { 321 _file = fopen(file_name, opentype); 322 _need_close = true; 323 } 324 325 void fileStream::write(const char* s, size_t len) { 326 if (_file != NULL) { 327 // Make an unused local variable to avoid warning from gcc 4.x compiler. 328 size_t count = fwrite(s, 1, len, _file); 329 } 330 update_position(s, len); 331 } 332 333 long fileStream::fileSize() { 334 long size = -1; 335 if (_file != NULL) { 336 long pos = ::ftell(_file); 337 if (::fseek(_file, 0, SEEK_END) == 0) { 338 size = ::ftell(_file); 339 } 340 ::fseek(_file, pos, SEEK_SET); 341 } 342 return size; 343 } 344 345 char* fileStream::readln(char *data, int count ) { 346 char * ret = ::fgets(data, count, _file); 347 //Get rid of annoying \n char 348 data[::strlen(data)-1] = '\0'; 349 return ret; 350 } 351 352 fileStream::~fileStream() { 353 if (_file != NULL) { 354 if (_need_close) fclose(_file); 355 _file = NULL; 356 } 357 } 358 359 void fileStream::flush() { 360 fflush(_file); 361 } 362 363 fdStream::fdStream(const char* file_name) { 364 _fd = open(file_name, O_WRONLY | O_CREAT | O_TRUNC, 0666); 365 _need_close = true; 366 } 367 368 fdStream::~fdStream() { 369 if (_fd != -1) { 370 if (_need_close) close(_fd); 371 _fd = -1; 372 } 373 } 374 375 void fdStream::write(const char* s, size_t len) { 376 if (_fd != -1) { 377 // Make an unused local variable to avoid warning from gcc 4.x compiler. 378 size_t count = ::write(_fd, s, (int)len); 379 } 380 update_position(s, len); 381 } 382 383 rotatingFileStream::~rotatingFileStream() { 384 if (_file != NULL) { 385 if (_need_close) fclose(_file); 386 _file = NULL; 387 FREE_C_HEAP_ARRAY(char, _file_name); 388 _file_name = NULL; 389 } 390 } 391 392 rotatingFileStream::rotatingFileStream(const char* file_name) { 393 _cur_file_num = 0; 394 _bytes_writen = 0L; 395 _file_name = NEW_C_HEAP_ARRAY(char, strlen(file_name)+10); 396 jio_snprintf(_file_name, strlen(file_name)+10, "%s.%d", file_name, _cur_file_num); 397 _file = fopen(_file_name, "w"); 398 _need_close = true; 399 } 400 401 rotatingFileStream::rotatingFileStream(const char* file_name, const char* opentype) { 402 _cur_file_num = 0; 403 _bytes_writen = 0L; 404 _file_name = NEW_C_HEAP_ARRAY(char, strlen(file_name)+10); 405 jio_snprintf(_file_name, strlen(file_name)+10, "%s.%d", file_name, _cur_file_num); 406 _file = fopen(_file_name, opentype); 407 _need_close = true; 408 } 409 410 void rotatingFileStream::write(const char* s, size_t len) { 411 if (_file != NULL) { 412 // Make an unused local variable to avoid warning from gcc 4.x compiler. 413 size_t count = fwrite(s, 1, len, _file); 414 Atomic::add((jlong)count, &_bytes_writen); 415 } 416 update_position(s, len); 417 } 418 419 // rotate_log must be called from VMThread at safepoint. In case need change parameters 420 // for gc log rotation from thread other than VMThread, a sub type of VM_Operation 421 // should be created and be submitted to VMThread's operation queue. DO NOT call this 422 // function directly. Currently, it is safe to rotate log at safepoint through VMThread. 423 // That is, no mutator threads and concurrent GC threads run parallel with VMThread to 424 // write to gc log file at safepoint. If in future, changes made for mutator threads or 425 // concurrent GC threads to run parallel with VMThread at safepoint, write and rotate_log 426 // must be synchronized. 427 void rotatingFileStream::rotate_log() { 428 if (_bytes_writen < (jlong)GCLogFileSize) return; 429 #ifdef ASSERT 430 Thread *thread = Thread::current(); 431 assert(thread == NULL || 432 (thread->is_VM_thread() && SafepointSynchronize::is_at_safepoint()), 433 "Must be VMThread at safepoint"); 434 #endif 435 if (NumberOfGCLogFiles == 1) { 436 // rotate in same file 437 rewind(); 438 _bytes_writen = 0L; 439 return; 440 } 441 442 // rotate file in names file.0, file.1, file.2, ..., file.<MaxGCLogFileNumbers-1> 443 // close current file, rotate to next file 444 if (_file != NULL) { 445 _cur_file_num ++; 446 if (_cur_file_num >= NumberOfGCLogFiles) _cur_file_num = 0; 447 jio_snprintf(_file_name, strlen(Arguments::gc_log_filename()) + 10, "%s.%d", 448 Arguments::gc_log_filename(), _cur_file_num); 449 fclose(_file); 450 _file = NULL; 451 } 452 _file = fopen(_file_name, "w"); 453 if (_file != NULL) { 454 _bytes_writen = 0L; 455 _need_close = true; 456 } else { 457 tty->print_cr("failed to open rotation log file %s due to %s\n", 458 _file_name, strerror(errno)); 459 _need_close = false; 460 } 461 } 462 463 defaultStream* defaultStream::instance = NULL; 464 int defaultStream::_output_fd = 1; 465 int defaultStream::_error_fd = 2; 466 FILE* defaultStream::_output_stream = stdout; 467 FILE* defaultStream::_error_stream = stderr; 468 469 #define LOG_MAJOR_VERSION 160 470 #define LOG_MINOR_VERSION 1 471 472 void defaultStream::init() { 473 _inited = true; 474 if (LogVMOutput || LogCompilation) { 475 init_log(); 476 } 477 } 478 479 bool defaultStream::has_log_file() { 480 // lazily create log file (at startup, LogVMOutput is false even 481 // if +LogVMOutput is used, because the flags haven't been parsed yet) 482 // For safer printing during fatal error handling, do not init logfile 483 // if a VM error has been reported. 484 if (!_inited && !is_error_reported()) init(); 485 return _log_file != NULL; 486 } 487 488 static const char* make_log_name(const char* log_name, const char* force_directory) { 489 const char* basename = log_name; 490 char file_sep = os::file_separator()[0]; 491 const char* cp; 492 for (cp = log_name; *cp != '\0'; cp++) { 493 if (*cp == '/' || *cp == file_sep) { 494 basename = cp+1; 495 } 496 } 497 const char* nametail = log_name; 498 499 // Compute buffer length 500 size_t buffer_length; 501 if (force_directory != NULL) { 502 buffer_length = strlen(force_directory) + strlen(os::file_separator()) + 503 strlen(basename) + 1; 504 } else { 505 buffer_length = strlen(log_name) + 1; 506 } 507 508 const char* star = strchr(basename, '*'); 509 int star_pos = (star == NULL) ? -1 : (star - nametail); 510 int skip = 1; 511 if (star == NULL) { 512 // Try %p 513 star = strstr(basename, "%p"); 514 if (star != NULL) { 515 skip = 2; 516 } 517 } 518 star_pos = (star == NULL) ? -1 : (star - nametail); 519 520 char pid[32]; 521 if (star_pos >= 0) { 522 jio_snprintf(pid, sizeof(pid), "%u", os::current_process_id()); 523 buffer_length += strlen(pid); 524 } 525 526 // Create big enough buffer. 527 char *buf = NEW_C_HEAP_ARRAY(char, buffer_length); 528 529 strcpy(buf, ""); 530 if (force_directory != NULL) { 531 strcat(buf, force_directory); 532 strcat(buf, os::file_separator()); 533 nametail = basename; // completely skip directory prefix 534 } 535 536 if (star_pos >= 0) { 537 // convert foo*bar.log or foo%pbar.log to foo123bar.log 538 int buf_pos = (int) strlen(buf); 539 strncpy(&buf[buf_pos], nametail, star_pos); 540 strcpy(&buf[buf_pos + star_pos], pid); 541 nametail += star_pos + skip; // skip prefix and pid format 542 } 543 544 strcat(buf, nametail); // append rest of name, or all of name 545 return buf; 546 } 547 548 void defaultStream::init_log() { 549 // %%% Need a MutexLocker? 550 const char* log_name = LogFile != NULL ? LogFile : "hotspot.log"; 551 const char* try_name = make_log_name(log_name, NULL); 552 fileStream* file = new(ResourceObj::C_HEAP) fileStream(try_name); 553 if (!file->is_open()) { 554 // Try again to open the file. 555 char warnbuf[O_BUFLEN*2]; 556 jio_snprintf(warnbuf, sizeof(warnbuf), 557 "Warning: Cannot open log file: %s\n", try_name); 558 // Note: This feature is for maintainer use only. No need for L10N. 559 jio_print(warnbuf); 560 FREE_C_HEAP_ARRAY(char, try_name); 561 try_name = make_log_name("hs_pid%p.log", os::get_temp_directory()); 562 jio_snprintf(warnbuf, sizeof(warnbuf), 563 "Warning: Forcing option -XX:LogFile=%s\n", try_name); 564 jio_print(warnbuf); 565 delete file; 566 file = new(ResourceObj::C_HEAP) fileStream(try_name); 567 FREE_C_HEAP_ARRAY(char, try_name); 568 } 569 if (file->is_open()) { 570 _log_file = file; 571 xmlStream* xs = new(ResourceObj::C_HEAP) xmlStream(file); 572 _outer_xmlStream = xs; 573 if (this == tty) xtty = xs; 574 // Write XML header. 575 xs->print_cr("<?xml version='1.0' encoding='UTF-8'?>"); 576 // (For now, don't bother to issue a DTD for this private format.) 577 jlong time_ms = os::javaTimeMillis() - tty->time_stamp().milliseconds(); 578 // %%% Should be: jlong time_ms = os::start_time_milliseconds(), if 579 // we ever get round to introduce that method on the os class 580 xs->head("hotspot_log version='%d %d'" 581 " process='%d' time_ms='"INT64_FORMAT"'", 582 LOG_MAJOR_VERSION, LOG_MINOR_VERSION, 583 os::current_process_id(), time_ms); 584 // Write VM version header immediately. 585 xs->head("vm_version"); 586 xs->head("name"); xs->text("%s", VM_Version::vm_name()); xs->cr(); 587 xs->tail("name"); 588 xs->head("release"); xs->text("%s", VM_Version::vm_release()); xs->cr(); 589 xs->tail("release"); 590 xs->head("info"); xs->text("%s", VM_Version::internal_vm_info_string()); xs->cr(); 591 xs->tail("info"); 592 xs->tail("vm_version"); 593 // Record information about the command-line invocation. 594 xs->head("vm_arguments"); // Cf. Arguments::print_on() 595 if (Arguments::num_jvm_flags() > 0) { 596 xs->head("flags"); 597 Arguments::print_jvm_flags_on(xs->text()); 598 xs->tail("flags"); 599 } 600 if (Arguments::num_jvm_args() > 0) { 601 xs->head("args"); 602 Arguments::print_jvm_args_on(xs->text()); 603 xs->tail("args"); 604 } 605 if (Arguments::java_command() != NULL) { 606 xs->head("command"); xs->text()->print_cr("%s", Arguments::java_command()); 607 xs->tail("command"); 608 } 609 if (Arguments::sun_java_launcher() != NULL) { 610 xs->head("launcher"); xs->text()->print_cr("%s", Arguments::sun_java_launcher()); 611 xs->tail("launcher"); 612 } 613 if (Arguments::system_properties() != NULL) { 614 xs->head("properties"); 615 // Print it as a java-style property list. 616 // System properties don't generally contain newlines, so don't bother with unparsing. 617 for (SystemProperty* p = Arguments::system_properties(); p != NULL; p = p->next()) { 618 xs->text()->print_cr("%s=%s", p->key(), p->value()); 619 } 620 xs->tail("properties"); 621 } 622 xs->tail("vm_arguments"); 623 // tty output per se is grouped under the <tty>...</tty> element. 624 xs->head("tty"); 625 // All further non-markup text gets copied to the tty: 626 xs->_text = this; // requires friend declaration! 627 } else { 628 delete(file); 629 // and leave xtty as NULL 630 LogVMOutput = false; 631 DisplayVMOutput = true; 632 LogCompilation = false; 633 } 634 } 635 636 // finish_log() is called during normal VM shutdown. finish_log_on_error() is 637 // called by ostream_abort() after a fatal error. 638 // 639 void defaultStream::finish_log() { 640 xmlStream* xs = _outer_xmlStream; 641 xs->done("tty"); 642 643 // Other log forks are appended here, at the End of Time: 644 CompileLog::finish_log(xs->out()); // write compile logging, if any, now 645 646 xs->done("hotspot_log"); 647 xs->flush(); 648 649 fileStream* file = _log_file; 650 _log_file = NULL; 651 652 delete _outer_xmlStream; 653 _outer_xmlStream = NULL; 654 655 file->flush(); 656 delete file; 657 } 658 659 void defaultStream::finish_log_on_error(char *buf, int buflen) { 660 xmlStream* xs = _outer_xmlStream; 661 662 if (xs && xs->out()) { 663 664 xs->done_raw("tty"); 665 666 // Other log forks are appended here, at the End of Time: 667 CompileLog::finish_log_on_error(xs->out(), buf, buflen); // write compile logging, if any, now 668 669 xs->done_raw("hotspot_log"); 670 xs->flush(); 671 672 fileStream* file = _log_file; 673 _log_file = NULL; 674 _outer_xmlStream = NULL; 675 676 if (file) { 677 file->flush(); 678 679 // Can't delete or close the file because delete and fclose aren't 680 // async-safe. We are about to die, so leave it to the kernel. 681 // delete file; 682 } 683 } 684 } 685 686 intx defaultStream::hold(intx writer_id) { 687 bool has_log = has_log_file(); // check before locking 688 if (// impossible, but who knows? 689 writer_id == NO_WRITER || 690 691 // bootstrap problem 692 tty_lock == NULL || 693 694 // can't grab a lock or call Thread::current() if TLS isn't initialized 695 ThreadLocalStorage::thread() == NULL || 696 697 // developer hook 698 !SerializeVMOutput || 699 700 // VM already unhealthy 701 is_error_reported() || 702 703 // safepoint == global lock (for VM only) 704 (SafepointSynchronize::is_synchronizing() && 705 Thread::current()->is_VM_thread()) 706 ) { 707 // do not attempt to lock unless we know the thread and the VM is healthy 708 return NO_WRITER; 709 } 710 if (_writer == writer_id) { 711 // already held, no need to re-grab the lock 712 return NO_WRITER; 713 } 714 tty_lock->lock_without_safepoint_check(); 715 // got the lock 716 if (writer_id != _last_writer) { 717 if (has_log) { 718 _log_file->bol(); 719 // output a hint where this output is coming from: 720 _log_file->print_cr("<writer thread='"INTX_FORMAT"'/>", writer_id); 721 } 722 _last_writer = writer_id; 723 } 724 _writer = writer_id; 725 return writer_id; 726 } 727 728 void defaultStream::release(intx holder) { 729 if (holder == NO_WRITER) { 730 // nothing to release: either a recursive lock, or we scribbled (too bad) 731 return; 732 } 733 if (_writer != holder) { 734 return; // already unlocked, perhaps via break_tty_lock_for_safepoint 735 } 736 _writer = NO_WRITER; 737 tty_lock->unlock(); 738 } 739 740 741 // Yuck: jio_print does not accept char*/len. 742 static void call_jio_print(const char* s, size_t len) { 743 char buffer[O_BUFLEN+100]; 744 if (len > sizeof(buffer)-1) { 745 warning("increase O_BUFLEN in ostream.cpp -- output truncated"); 746 len = sizeof(buffer)-1; 747 } 748 strncpy(buffer, s, len); 749 buffer[len] = '\0'; 750 jio_print(buffer); 751 } 752 753 754 void defaultStream::write(const char* s, size_t len) { 755 intx thread_id = os::current_thread_id(); 756 intx holder = hold(thread_id); 757 758 if (DisplayVMOutput && 759 (_outer_xmlStream == NULL || !_outer_xmlStream->inside_attrs())) { 760 // print to output stream. It can be redirected by a vfprintf hook 761 if (s[len] == '\0') { 762 jio_print(s); 763 } else { 764 call_jio_print(s, len); 765 } 766 } 767 768 // print to log file 769 if (has_log_file()) { 770 int nl0 = _newlines; 771 xmlTextStream::write(s, len); 772 // flush the log file too, if there were any newlines 773 if (nl0 != _newlines){ 774 flush(); 775 } 776 } else { 777 update_position(s, len); 778 } 779 780 release(holder); 781 } 782 783 intx ttyLocker::hold_tty() { 784 if (defaultStream::instance == NULL) return defaultStream::NO_WRITER; 785 intx thread_id = os::current_thread_id(); 786 return defaultStream::instance->hold(thread_id); 787 } 788 789 void ttyLocker::release_tty(intx holder) { 790 if (holder == defaultStream::NO_WRITER) return; 791 defaultStream::instance->release(holder); 792 } 793 794 bool ttyLocker::release_tty_if_locked() { 795 intx thread_id = os::current_thread_id(); 796 if (defaultStream::instance->writer() == thread_id) { 797 // release the lock and return true so callers know if was 798 // previously held. 799 release_tty(thread_id); 800 return true; 801 } 802 return false; 803 } 804 805 void ttyLocker::break_tty_lock_for_safepoint(intx holder) { 806 if (defaultStream::instance != NULL && 807 defaultStream::instance->writer() == holder) { 808 if (xtty != NULL) { 809 xtty->print_cr("<!-- safepoint while printing -->"); 810 } 811 defaultStream::instance->release(holder); 812 } 813 // (else there was no lock to break) 814 } 815 816 void ostream_init() { 817 if (defaultStream::instance == NULL) { 818 defaultStream::instance = new(ResourceObj::C_HEAP) defaultStream(); 819 tty = defaultStream::instance; 820 821 // We want to ensure that time stamps in GC logs consider time 0 822 // the time when the JVM is initialized, not the first time we ask 823 // for a time stamp. So, here, we explicitly update the time stamp 824 // of tty. 825 tty->time_stamp().update_to(1); 826 } 827 } 828 829 void ostream_init_log() { 830 // For -Xloggc:<file> option - called in runtime/thread.cpp 831 // Note : this must be called AFTER ostream_init() 832 833 gclog_or_tty = tty; // default to tty 834 if (Arguments::gc_log_filename() != NULL) { 835 fileStream * gclog = UseGCLogFileRotation ? 836 new(ResourceObj::C_HEAP) 837 rotatingFileStream(Arguments::gc_log_filename()) : 838 new(ResourceObj::C_HEAP) 839 fileStream(Arguments::gc_log_filename()); 840 if (gclog->is_open()) { 841 // now we update the time stamp of the GC log to be synced up 842 // with tty. 843 gclog->time_stamp().update_to(tty->time_stamp().ticks()); 844 } 845 gclog_or_tty = gclog; 846 } 847 848 // If we haven't lazily initialized the logfile yet, do it now, 849 // to avoid the possibility of lazy initialization during a VM 850 // crash, which can affect the stability of the fatal error handler. 851 defaultStream::instance->has_log_file(); 852 } 853 854 // ostream_exit() is called during normal VM exit to finish log files, flush 855 // output and free resource. 856 void ostream_exit() { 857 static bool ostream_exit_called = false; 858 if (ostream_exit_called) return; 859 ostream_exit_called = true; 860 if (gclog_or_tty != tty) { 861 delete gclog_or_tty; 862 } 863 { 864 // we temporaly disable PrintMallocFree here 865 // as otherwise it'll lead to using of almost deleted 866 // tty or defaultStream::instance in logging facility 867 // of HeapFree(), see 6391258 868 DEBUG_ONLY(FlagSetting fs(PrintMallocFree, false);) 869 if (tty != defaultStream::instance) { 870 delete tty; 871 } 872 if (defaultStream::instance != NULL) { 873 delete defaultStream::instance; 874 } 875 } 876 tty = NULL; 877 xtty = NULL; 878 gclog_or_tty = NULL; 879 defaultStream::instance = NULL; 880 } 881 882 // ostream_abort() is called by os::abort() when VM is about to die. 883 void ostream_abort() { 884 // Here we can't delete gclog_or_tty and tty, just flush their output 885 if (gclog_or_tty) gclog_or_tty->flush(); 886 if (tty) tty->flush(); 887 888 if (defaultStream::instance != NULL) { 889 static char buf[4096]; 890 defaultStream::instance->finish_log_on_error(buf, sizeof(buf)); 891 } 892 } 893 894 staticBufferStream::staticBufferStream(char* buffer, size_t buflen, 895 outputStream *outer_stream) { 896 _buffer = buffer; 897 _buflen = buflen; 898 _outer_stream = outer_stream; 899 // compile task prints time stamp relative to VM start 900 _stamp.update_to(1); 901 } 902 903 void staticBufferStream::write(const char* c, size_t len) { 904 _outer_stream->print_raw(c, (int)len); 905 } 906 907 void staticBufferStream::flush() { 908 _outer_stream->flush(); 909 } 910 911 void staticBufferStream::print(const char* format, ...) { 912 va_list ap; 913 va_start(ap, format); 914 size_t len; 915 const char* str = do_vsnprintf(_buffer, _buflen, format, ap, false, len); 916 write(str, len); 917 va_end(ap); 918 } 919 920 void staticBufferStream::print_cr(const char* format, ...) { 921 va_list ap; 922 va_start(ap, format); 923 size_t len; 924 const char* str = do_vsnprintf(_buffer, _buflen, format, ap, true, len); 925 write(str, len); 926 va_end(ap); 927 } 928 929 void staticBufferStream::vprint(const char *format, va_list argptr) { 930 size_t len; 931 const char* str = do_vsnprintf(_buffer, _buflen, format, argptr, false, len); 932 write(str, len); 933 } 934 935 void staticBufferStream::vprint_cr(const char* format, va_list argptr) { 936 size_t len; 937 const char* str = do_vsnprintf(_buffer, _buflen, format, argptr, true, len); 938 write(str, len); 939 } 940 941 bufferedStream::bufferedStream(size_t initial_size, size_t bufmax) : outputStream() { 942 buffer_length = initial_size; 943 buffer = NEW_C_HEAP_ARRAY(char, buffer_length); 944 buffer_pos = 0; 945 buffer_fixed = false; 946 buffer_max = bufmax; 947 } 948 949 bufferedStream::bufferedStream(char* fixed_buffer, size_t fixed_buffer_size, size_t bufmax) : outputStream() { 950 buffer_length = fixed_buffer_size; 951 buffer = fixed_buffer; 952 buffer_pos = 0; 953 buffer_fixed = true; 954 buffer_max = bufmax; 955 } 956 957 void bufferedStream::write(const char* s, size_t len) { 958 959 if(buffer_pos + len > buffer_max) { 960 flush(); 961 } 962 963 size_t end = buffer_pos + len; 964 if (end >= buffer_length) { 965 if (buffer_fixed) { 966 // if buffer cannot resize, silently truncate 967 len = buffer_length - buffer_pos - 1; 968 } else { 969 // For small overruns, double the buffer. For larger ones, 970 // increase to the requested size. 971 if (end < buffer_length * 2) { 972 end = buffer_length * 2; 973 } 974 buffer = REALLOC_C_HEAP_ARRAY(char, buffer, end); 975 buffer_length = end; 976 } 977 } 978 memcpy(buffer + buffer_pos, s, len); 979 buffer_pos += len; 980 update_position(s, len); 981 } 982 983 char* bufferedStream::as_string() { 984 char* copy = NEW_RESOURCE_ARRAY(char, buffer_pos+1); 985 strncpy(copy, buffer, buffer_pos); 986 copy[buffer_pos] = 0; // terminating null 987 return copy; 988 } 989 990 bufferedStream::~bufferedStream() { 991 if (!buffer_fixed) { 992 FREE_C_HEAP_ARRAY(char, buffer); 993 } 994 } 995 996 #ifndef PRODUCT 997 998 #if defined(SOLARIS) || defined(LINUX) 999 #include <sys/types.h> 1000 #include <sys/socket.h> 1001 #include <netinet/in.h> 1002 #include <arpa/inet.h> 1003 #endif 1004 1005 // Network access 1006 networkStream::networkStream() : bufferedStream(1024*10, 1024*10) { 1007 1008 _socket = -1; 1009 1010 int result = os::socket(AF_INET, SOCK_STREAM, 0); 1011 if (result <= 0) { 1012 assert(false, "Socket could not be created!"); 1013 } else { 1014 _socket = result; 1015 } 1016 } 1017 1018 int networkStream::read(char *buf, size_t len) { 1019 return os::recv(_socket, buf, (int)len, 0); 1020 } 1021 1022 void networkStream::flush() { 1023 if (size() != 0) { 1024 int result = os::raw_send(_socket, (char *)base(), (int)size(), 0); 1025 assert(result != -1, "connection error"); 1026 assert(result == (int)size(), "didn't send enough data"); 1027 } 1028 reset(); 1029 } 1030 1031 networkStream::~networkStream() { 1032 close(); 1033 } 1034 1035 void networkStream::close() { 1036 if (_socket != -1) { 1037 flush(); 1038 os::socket_close(_socket); 1039 _socket = -1; 1040 } 1041 } 1042 1043 bool networkStream::connect(const char *ip, short port) { 1044 1045 struct sockaddr_in server; 1046 server.sin_family = AF_INET; 1047 server.sin_port = htons(port); 1048 1049 server.sin_addr.s_addr = inet_addr(ip); 1050 if (server.sin_addr.s_addr == (uint32_t)-1) { 1051 struct hostent* host = os::get_host_by_name((char*)ip); 1052 if (host != NULL) { 1053 memcpy(&server.sin_addr, host->h_addr_list[0], host->h_length); 1054 } else { 1055 return false; 1056 } 1057 } 1058 1059 1060 int result = os::connect(_socket, (struct sockaddr*)&server, sizeof(struct sockaddr_in)); 1061 return (result >= 0); 1062 } 1063 1064 #endif