1 /* 2 * Copyright (c) 1997, 2016, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. 8 * 9 * This code is distributed in the hope that it will be useful, but WITHOUT 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 12 * version 2 for more details (a copy is included in the LICENSE file that 13 * accompanied this code). 14 * 15 * You should have received a copy of the GNU General Public License version 16 * 2 along with this work; if not, write to the Free Software Foundation, 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 18 * 19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 20 * or visit www.oracle.com if you need additional information or have any 21 * questions. 22 * 23 */ 24 25 #include "precompiled.hpp" 26 #include "compiler/compileLog.hpp" 27 #include "gc/shared/gcId.hpp" 28 #include "gc/shared/gcId.hpp" 29 #include "oops/oop.inline.hpp" 30 #include "runtime/arguments.hpp" 31 #include "runtime/os.hpp" 32 #include "runtime/vm_version.hpp" 33 #include "utilities/defaultStream.hpp" 34 #include "utilities/macros.hpp" 35 #include "utilities/ostream.hpp" 36 #include "utilities/top.hpp" 37 #include "utilities/xmlstream.hpp" 38 39 extern "C" void jio_print(const char* s); // Declarationtion of jvm method 40 41 outputStream::outputStream(int width) { 42 _width = width; 43 _position = 0; 44 _newlines = 0; 45 _precount = 0; 46 _indentation = 0; 47 _scratch = NULL; 48 _scratch_len = 0; 49 } 50 51 outputStream::outputStream(int width, bool has_time_stamps) { 52 _width = width; 53 _position = 0; 54 _newlines = 0; 55 _precount = 0; 56 _indentation = 0; 57 _scratch = NULL; 58 _scratch_len = 0; 59 if (has_time_stamps) _stamp.update(); 60 } 61 62 void outputStream::update_position(const char* s, size_t len) { 63 for (size_t i = 0; i < len; i++) { 64 char ch = s[i]; 65 if (ch == '\n') { 66 _newlines += 1; 67 _precount += _position + 1; 68 _position = 0; 69 } else if (ch == '\t') { 70 int tw = 8 - (_position & 7); 71 _position += tw; 72 _precount -= tw-1; // invariant: _precount + _position == total count 73 } else { 74 _position += 1; 75 } 76 } 77 } 78 79 // Execute a vsprintf, using the given buffer if necessary. 80 // Return a pointer to the formatted string. 81 const char* outputStream::do_vsnprintf(char* buffer, size_t buflen, 82 const char* format, va_list ap, 83 bool add_cr, 84 size_t& result_len) { 85 assert(buflen >= 2, "buffer too small"); 86 87 const char* result; 88 if (add_cr) buflen--; 89 if (!strchr(format, '%')) { 90 // constant format string 91 result = format; 92 result_len = strlen(result); 93 if (add_cr && result_len >= buflen) result_len = buflen-1; // truncate 94 } else if (format[0] == '%' && format[1] == 's' && format[2] == '\0') { 95 // trivial copy-through format string 96 result = va_arg(ap, const char*); 97 result_len = strlen(result); 98 if (add_cr && result_len >= buflen) result_len = buflen-1; // truncate 99 } else { 100 // Handle truncation: 101 // posix: upon truncation, vsnprintf returns number of bytes which 102 // would have been written (excluding terminating zero) had the buffer 103 // been large enough 104 // windows: upon truncation, vsnprintf returns -1 105 const int written = vsnprintf(buffer, buflen, format, ap); 106 result = buffer; 107 if (written < (int) buflen && written >= 0) { 108 result_len = written; 109 } else { 110 DEBUG_ONLY(warning("increase O_BUFLEN in ostream.hpp -- output truncated");) 111 result_len = buflen - 1; 112 buffer[result_len] = 0; 113 } 114 } 115 if (add_cr) { 116 if (result != buffer) { 117 memcpy(buffer, result, result_len); 118 result = buffer; 119 } 120 buffer[result_len++] = '\n'; 121 buffer[result_len] = 0; 122 } 123 return result; 124 } 125 126 void outputStream::do_vsnprintf_and_write_with_automatic_buffer(const char* format, va_list ap, bool add_cr) { 127 char buffer[O_BUFLEN]; 128 size_t len; 129 const char* str = do_vsnprintf(buffer, sizeof(buffer), format, ap, add_cr, len); 130 write(str, len); 131 } 132 133 void outputStream::do_vsnprintf_and_write_with_scratch_buffer(const char* format, va_list ap, bool add_cr) { 134 size_t len; 135 const char* str = do_vsnprintf(_scratch, _scratch_len, format, ap, add_cr, len); 136 write(str, len); 137 } 138 139 void outputStream::do_vsnprintf_and_write(const char* format, va_list ap, bool add_cr) { 140 if (_scratch) { 141 do_vsnprintf_and_write_with_scratch_buffer(format, ap, add_cr); 142 } else { 143 do_vsnprintf_and_write_with_automatic_buffer(format, ap, add_cr); 144 } 145 } 146 147 void outputStream::print(const char* format, ...) { 148 va_list ap; 149 va_start(ap, format); 150 do_vsnprintf_and_write(format, ap, false); 151 va_end(ap); 152 } 153 154 void outputStream::print_cr(const char* format, ...) { 155 va_list ap; 156 va_start(ap, format); 157 do_vsnprintf_and_write(format, ap, true); 158 va_end(ap); 159 } 160 161 void outputStream::vprint(const char *format, va_list argptr) { 162 do_vsnprintf_and_write(format, argptr, false); 163 } 164 165 void outputStream::vprint_cr(const char* format, va_list argptr) { 166 do_vsnprintf_and_write(format, argptr, true); 167 } 168 169 void outputStream::fill_to(int col) { 170 int need_fill = col - position(); 171 sp(need_fill); 172 } 173 174 void outputStream::move_to(int col, int slop, int min_space) { 175 if (position() >= col + slop) 176 cr(); 177 int need_fill = col - position(); 178 if (need_fill < min_space) 179 need_fill = min_space; 180 sp(need_fill); 181 } 182 183 void outputStream::put(char ch) { 184 assert(ch != 0, "please fix call site"); 185 char buf[] = { ch, '\0' }; 186 write(buf, 1); 187 } 188 189 #define SP_USE_TABS false 190 191 void outputStream::sp(int count) { 192 if (count < 0) return; 193 if (SP_USE_TABS && count >= 8) { 194 int target = position() + count; 195 while (count >= 8) { 196 this->write("\t", 1); 197 count -= 8; 198 } 199 count = target - position(); 200 } 201 while (count > 0) { 202 int nw = (count > 8) ? 8 : count; 203 this->write(" ", nw); 204 count -= nw; 205 } 206 } 207 208 void outputStream::cr() { 209 this->write("\n", 1); 210 } 211 212 void outputStream::stamp() { 213 if (! _stamp.is_updated()) { 214 _stamp.update(); // start at 0 on first call to stamp() 215 } 216 217 // outputStream::stamp() may get called by ostream_abort(), use snprintf 218 // to avoid allocating large stack buffer in print(). 219 char buf[40]; 220 jio_snprintf(buf, sizeof(buf), "%.3f", _stamp.seconds()); 221 print_raw(buf); 222 } 223 224 void outputStream::stamp(bool guard, 225 const char* prefix, 226 const char* suffix) { 227 if (!guard) { 228 return; 229 } 230 print_raw(prefix); 231 stamp(); 232 print_raw(suffix); 233 } 234 235 void outputStream::date_stamp(bool guard, 236 const char* prefix, 237 const char* suffix) { 238 if (!guard) { 239 return; 240 } 241 print_raw(prefix); 242 static const char error_time[] = "yyyy-mm-ddThh:mm:ss.mmm+zzzz"; 243 static const int buffer_length = 32; 244 char buffer[buffer_length]; 245 const char* iso8601_result = os::iso8601_time(buffer, buffer_length); 246 if (iso8601_result != NULL) { 247 print_raw(buffer); 248 } else { 249 print_raw(error_time); 250 } 251 print_raw(suffix); 252 return; 253 } 254 255 outputStream& outputStream::indent() { 256 while (_position < _indentation) sp(); 257 return *this; 258 } 259 260 void outputStream::print_jlong(jlong value) { 261 print(JLONG_FORMAT, value); 262 } 263 264 void outputStream::print_julong(julong value) { 265 print(JULONG_FORMAT, value); 266 } 267 268 /** 269 * This prints out hex data in a 'windbg' or 'xxd' form, where each line is: 270 * <hex-address>: 8 * <hex-halfword> <ascii translation (optional)> 271 * example: 272 * 0000000: 7f44 4f46 0102 0102 0000 0000 0000 0000 .DOF............ 273 * 0000010: 0000 0000 0000 0040 0000 0020 0000 0005 .......@... .... 274 * 0000020: 0000 0000 0000 0040 0000 0000 0000 015d .......@.......] 275 * ... 276 * 277 * indent is applied to each line. Ends with a CR. 278 */ 279 void outputStream::print_data(void* data, size_t len, bool with_ascii) { 280 size_t limit = (len + 16) / 16 * 16; 281 for (size_t i = 0; i < limit; ++i) { 282 if (i % 16 == 0) { 283 indent().print(INTPTR_FORMAT_W(07) ":", i); 284 } 285 if (i % 2 == 0) { 286 print(" "); 287 } 288 if (i < len) { 289 print("%02x", ((unsigned char*)data)[i]); 290 } else { 291 print(" "); 292 } 293 if ((i + 1) % 16 == 0) { 294 if (with_ascii) { 295 print(" "); 296 for (size_t j = 0; j < 16; ++j) { 297 size_t idx = i + j - 15; 298 if (idx < len) { 299 char c = ((char*)data)[idx]; 300 print("%c", c >= 32 && c <= 126 ? c : '.'); 301 } 302 } 303 } 304 cr(); 305 } 306 } 307 } 308 309 stringStream::stringStream(size_t initial_size) : outputStream() { 310 buffer_length = initial_size; 311 buffer = NEW_RESOURCE_ARRAY(char, buffer_length); 312 buffer_pos = 0; 313 buffer_fixed = false; 314 DEBUG_ONLY(rm = Thread::current()->current_resource_mark();) 315 } 316 317 // useful for output to fixed chunks of memory, such as performance counters 318 stringStream::stringStream(char* fixed_buffer, size_t fixed_buffer_size) : outputStream() { 319 buffer_length = fixed_buffer_size; 320 buffer = fixed_buffer; 321 buffer_pos = 0; 322 buffer_fixed = true; 323 } 324 325 void stringStream::write(const char* s, size_t len) { 326 size_t write_len = len; // number of non-null bytes to write 327 size_t end = buffer_pos + len + 1; // position after write and final '\0' 328 if (end > buffer_length) { 329 if (buffer_fixed) { 330 // if buffer cannot resize, silently truncate 331 end = buffer_length; 332 write_len = end - buffer_pos - 1; // leave room for the final '\0' 333 } else { 334 // For small overruns, double the buffer. For larger ones, 335 // increase to the requested size. 336 if (end < buffer_length * 2) { 337 end = buffer_length * 2; 338 } 339 char* oldbuf = buffer; 340 assert(rm == NULL || Thread::current()->current_resource_mark() == rm, 341 "stringStream is re-allocated with a different ResourceMark"); 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, 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, 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 // Print in two stages to avoid problems with long 708 // keys/values. 709 text->print_raw(p->key()); 710 text->put('='); 711 text->print_raw_cr(p->value()); 712 } 713 xs->tail("properties"); 714 } 715 xs->tail("vm_arguments"); 716 // tty output per se is grouped under the <tty>...</tty> element. 717 xs->head("tty"); 718 // All further non-markup text gets copied to the tty: 719 xs->_text = this; // requires friend declaration! 720 } 721 722 // finish_log() is called during normal VM shutdown. finish_log_on_error() is 723 // called by ostream_abort() after a fatal error. 724 // 725 void defaultStream::finish_log() { 726 xmlStream* xs = _outer_xmlStream; 727 xs->done("tty"); 728 729 // Other log forks are appended here, at the End of Time: 730 CompileLog::finish_log(xs->out()); // write compile logging, if any, now 731 732 xs->done("hotspot_log"); 733 xs->flush(); 734 735 fileStream* file = _log_file; 736 _log_file = NULL; 737 738 delete _outer_xmlStream; 739 _outer_xmlStream = NULL; 740 741 file->flush(); 742 delete file; 743 } 744 745 void defaultStream::finish_log_on_error(char *buf, int buflen) { 746 xmlStream* xs = _outer_xmlStream; 747 748 if (xs && xs->out()) { 749 750 xs->done_raw("tty"); 751 752 // Other log forks are appended here, at the End of Time: 753 CompileLog::finish_log_on_error(xs->out(), buf, buflen); // write compile logging, if any, now 754 755 xs->done_raw("hotspot_log"); 756 xs->flush(); 757 758 fileStream* file = _log_file; 759 _log_file = NULL; 760 _outer_xmlStream = NULL; 761 762 if (file) { 763 file->flush(); 764 765 // Can't delete or close the file because delete and fclose aren't 766 // async-safe. We are about to die, so leave it to the kernel. 767 // delete file; 768 } 769 } 770 } 771 772 intx defaultStream::hold(intx writer_id) { 773 bool has_log = has_log_file(); // check before locking 774 if (// impossible, but who knows? 775 writer_id == NO_WRITER || 776 777 // bootstrap problem 778 tty_lock == NULL || 779 780 // can't grab a lock if current Thread isn't set 781 Thread::current_or_null() == NULL || 782 783 // developer hook 784 !SerializeVMOutput || 785 786 // VM already unhealthy 787 is_error_reported() || 788 789 // safepoint == global lock (for VM only) 790 (SafepointSynchronize::is_synchronizing() && 791 Thread::current()->is_VM_thread()) 792 ) { 793 // do not attempt to lock unless we know the thread and the VM is healthy 794 return NO_WRITER; 795 } 796 if (_writer == writer_id) { 797 // already held, no need to re-grab the lock 798 return NO_WRITER; 799 } 800 tty_lock->lock_without_safepoint_check(); 801 // got the lock 802 if (writer_id != _last_writer) { 803 if (has_log) { 804 _log_file->bol(); 805 // output a hint where this output is coming from: 806 _log_file->print_cr("<writer thread='" UINTX_FORMAT "'/>", writer_id); 807 } 808 _last_writer = writer_id; 809 } 810 _writer = writer_id; 811 return writer_id; 812 } 813 814 void defaultStream::release(intx holder) { 815 if (holder == NO_WRITER) { 816 // nothing to release: either a recursive lock, or we scribbled (too bad) 817 return; 818 } 819 if (_writer != holder) { 820 return; // already unlocked, perhaps via break_tty_lock_for_safepoint 821 } 822 _writer = NO_WRITER; 823 tty_lock->unlock(); 824 } 825 826 827 // Yuck: jio_print does not accept char*/len. 828 static void call_jio_print(const char* s, size_t len) { 829 char buffer[O_BUFLEN+100]; 830 if (len > sizeof(buffer)-1) { 831 warning("increase O_BUFLEN in ostream.cpp -- output truncated"); 832 len = sizeof(buffer)-1; 833 } 834 strncpy(buffer, s, len); 835 buffer[len] = '\0'; 836 jio_print(buffer); 837 } 838 839 840 void defaultStream::write(const char* s, size_t len) { 841 intx thread_id = os::current_thread_id(); 842 intx holder = hold(thread_id); 843 844 if (DisplayVMOutput && 845 (_outer_xmlStream == NULL || !_outer_xmlStream->inside_attrs())) { 846 // print to output stream. It can be redirected by a vfprintf hook 847 if (s[len] == '\0') { 848 jio_print(s); 849 } else { 850 call_jio_print(s, len); 851 } 852 } 853 854 // print to log file 855 if (has_log_file()) { 856 int nl0 = _newlines; 857 xmlTextStream::write(s, len); 858 // flush the log file too, if there were any newlines 859 if (nl0 != _newlines){ 860 flush(); 861 } 862 } else { 863 update_position(s, len); 864 } 865 866 release(holder); 867 } 868 869 intx ttyLocker::hold_tty() { 870 if (defaultStream::instance == NULL) return defaultStream::NO_WRITER; 871 intx thread_id = os::current_thread_id(); 872 return defaultStream::instance->hold(thread_id); 873 } 874 875 void ttyLocker::release_tty(intx holder) { 876 if (holder == defaultStream::NO_WRITER) return; 877 defaultStream::instance->release(holder); 878 } 879 880 bool ttyLocker::release_tty_if_locked() { 881 intx thread_id = os::current_thread_id(); 882 if (defaultStream::instance->writer() == thread_id) { 883 // release the lock and return true so callers know if was 884 // previously held. 885 release_tty(thread_id); 886 return true; 887 } 888 return false; 889 } 890 891 void ttyLocker::break_tty_lock_for_safepoint(intx holder) { 892 if (defaultStream::instance != NULL && 893 defaultStream::instance->writer() == holder) { 894 if (xtty != NULL) { 895 xtty->print_cr("<!-- safepoint while printing -->"); 896 } 897 defaultStream::instance->release(holder); 898 } 899 // (else there was no lock to break) 900 } 901 902 void ostream_init() { 903 if (defaultStream::instance == NULL) { 904 defaultStream::instance = new(ResourceObj::C_HEAP, mtInternal) defaultStream(); 905 tty = defaultStream::instance; 906 907 // We want to ensure that time stamps in GC logs consider time 0 908 // the time when the JVM is initialized, not the first time we ask 909 // for a time stamp. So, here, we explicitly update the time stamp 910 // of tty. 911 tty->time_stamp().update_to(1); 912 } 913 } 914 915 void ostream_init_log() { 916 // Note : this must be called AFTER ostream_init() 917 918 #if INCLUDE_CDS 919 // For -XX:DumpLoadedClassList=<file> option 920 if (DumpLoadedClassList != NULL) { 921 const char* list_name = make_log_name(DumpLoadedClassList, NULL); 922 classlist_file = new(ResourceObj::C_HEAP, mtInternal) 923 fileStream(list_name); 924 FREE_C_HEAP_ARRAY(char, list_name); 925 } 926 #endif 927 928 // If we haven't lazily initialized the logfile yet, do it now, 929 // to avoid the possibility of lazy initialization during a VM 930 // crash, which can affect the stability of the fatal error handler. 931 defaultStream::instance->has_log_file(); 932 } 933 934 // ostream_exit() is called during normal VM exit to finish log files, flush 935 // output and free resource. 936 void ostream_exit() { 937 static bool ostream_exit_called = false; 938 if (ostream_exit_called) return; 939 ostream_exit_called = true; 940 #if INCLUDE_CDS 941 if (classlist_file != NULL) { 942 delete classlist_file; 943 } 944 #endif 945 { 946 // we temporaly disable PrintMallocFree here 947 // as otherwise it'll lead to using of almost deleted 948 // tty or defaultStream::instance in logging facility 949 // of HeapFree(), see 6391258 950 DEBUG_ONLY(FlagSetting fs(PrintMallocFree, false);) 951 if (tty != defaultStream::instance) { 952 delete tty; 953 } 954 if (defaultStream::instance != NULL) { 955 delete defaultStream::instance; 956 } 957 } 958 tty = NULL; 959 xtty = NULL; 960 defaultStream::instance = NULL; 961 } 962 963 // ostream_abort() is called by os::abort() when VM is about to die. 964 void ostream_abort() { 965 // Here we can't delete tty, just flush its output 966 if (tty) tty->flush(); 967 968 if (defaultStream::instance != NULL) { 969 static char buf[4096]; 970 defaultStream::instance->finish_log_on_error(buf, sizeof(buf)); 971 } 972 } 973 974 bufferedStream::bufferedStream(size_t initial_size, size_t bufmax) : outputStream() { 975 buffer_length = initial_size; 976 buffer = NEW_C_HEAP_ARRAY(char, buffer_length, mtInternal); 977 buffer_pos = 0; 978 buffer_fixed = false; 979 buffer_max = bufmax; 980 } 981 982 bufferedStream::bufferedStream(char* fixed_buffer, size_t fixed_buffer_size, size_t bufmax) : outputStream() { 983 buffer_length = fixed_buffer_size; 984 buffer = fixed_buffer; 985 buffer_pos = 0; 986 buffer_fixed = true; 987 buffer_max = bufmax; 988 } 989 990 void bufferedStream::write(const char* s, size_t len) { 991 992 if(buffer_pos + len > buffer_max) { 993 flush(); 994 } 995 996 size_t end = buffer_pos + len; 997 if (end >= buffer_length) { 998 if (buffer_fixed) { 999 // if buffer cannot resize, silently truncate 1000 len = buffer_length - buffer_pos - 1; 1001 } else { 1002 // For small overruns, double the buffer. For larger ones, 1003 // increase to the requested size. 1004 if (end < buffer_length * 2) { 1005 end = buffer_length * 2; 1006 } 1007 buffer = REALLOC_C_HEAP_ARRAY(char, buffer, end, mtInternal); 1008 buffer_length = end; 1009 } 1010 } 1011 memcpy(buffer + buffer_pos, s, len); 1012 buffer_pos += len; 1013 update_position(s, len); 1014 } 1015 1016 char* bufferedStream::as_string() { 1017 char* copy = NEW_RESOURCE_ARRAY(char, buffer_pos+1); 1018 strncpy(copy, buffer, buffer_pos); 1019 copy[buffer_pos] = 0; // terminating null 1020 return copy; 1021 } 1022 1023 bufferedStream::~bufferedStream() { 1024 if (!buffer_fixed) { 1025 FREE_C_HEAP_ARRAY(char, buffer); 1026 } 1027 } 1028 1029 #ifndef PRODUCT 1030 1031 #if defined(SOLARIS) || defined(LINUX) || defined(AIX) || defined(_ALLBSD_SOURCE) 1032 #include <sys/types.h> 1033 #include <sys/socket.h> 1034 #include <netinet/in.h> 1035 #include <arpa/inet.h> 1036 #endif 1037 1038 // Network access 1039 networkStream::networkStream() : bufferedStream(1024*10, 1024*10) { 1040 1041 _socket = -1; 1042 1043 int result = os::socket(AF_INET, SOCK_STREAM, 0); 1044 if (result <= 0) { 1045 assert(false, "Socket could not be created!"); 1046 } else { 1047 _socket = result; 1048 } 1049 } 1050 1051 int networkStream::read(char *buf, size_t len) { 1052 return os::recv(_socket, buf, (int)len, 0); 1053 } 1054 1055 void networkStream::flush() { 1056 if (size() != 0) { 1057 int result = os::raw_send(_socket, (char *)base(), size(), 0); 1058 assert(result != -1, "connection error"); 1059 assert(result == (int)size(), "didn't send enough data"); 1060 } 1061 reset(); 1062 } 1063 1064 networkStream::~networkStream() { 1065 close(); 1066 } 1067 1068 void networkStream::close() { 1069 if (_socket != -1) { 1070 flush(); 1071 os::socket_close(_socket); 1072 _socket = -1; 1073 } 1074 } 1075 1076 bool networkStream::connect(const char *ip, short port) { 1077 1078 struct sockaddr_in server; 1079 server.sin_family = AF_INET; 1080 server.sin_port = htons(port); 1081 1082 server.sin_addr.s_addr = inet_addr(ip); 1083 if (server.sin_addr.s_addr == (uint32_t)-1) { 1084 struct hostent* host = os::get_host_by_name((char*)ip); 1085 if (host != NULL) { 1086 memcpy(&server.sin_addr, host->h_addr_list[0], host->h_length); 1087 } else { 1088 return false; 1089 } 1090 } 1091 1092 1093 int result = os::connect(_socket, (struct sockaddr*)&server, sizeof(struct sockaddr_in)); 1094 return (result >= 0); 1095 } 1096 1097 #endif 1098 1099 void logStream::write(const char* s, size_t len) { 1100 if (len > 0 && s[len - 1] == '\n') { 1101 _current_line.write(s, len - 1); 1102 _log_func("%s", _current_line.as_string()); 1103 _current_line.reset(); 1104 } else { 1105 _current_line.write(s, len); 1106 } 1107 update_position(s, len); 1108 }