1 /* 2 * Copyright (c) 1997, 2020, 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 "jvm.h" 27 #include "compiler/compileLog.hpp" 28 #include "memory/allocation.inline.hpp" 29 #include "oops/oop.inline.hpp" 30 #include "runtime/arguments.hpp" 31 #include "runtime/os.inline.hpp" 32 #include "runtime/orderAccess.hpp" 33 #include "runtime/vm_version.hpp" 34 #include "utilities/defaultStream.hpp" 35 #include "utilities/macros.hpp" 36 #include "utilities/ostream.hpp" 37 #include "utilities/vmError.hpp" 38 #include "utilities/xmlstream.hpp" 39 40 // Declarations of jvm methods 41 extern "C" void jio_print(const char* s, size_t len); 42 extern "C" int jio_printf(const char *fmt, ...); 43 44 outputStream::outputStream(int width) { 45 _width = width; 46 _position = 0; 47 _newlines = 0; 48 _precount = 0; 49 _indentation = 0; 50 _scratch = NULL; 51 _scratch_len = 0; 52 } 53 54 outputStream::outputStream(int width, bool has_time_stamps) { 55 _width = width; 56 _position = 0; 57 _newlines = 0; 58 _precount = 0; 59 _indentation = 0; 60 _scratch = NULL; 61 _scratch_len = 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 assert(buflen >= 2, "buffer too small"); 89 90 const char* result; 91 if (add_cr) buflen--; 92 if (!strchr(format, '%')) { 93 // constant format string 94 result = format; 95 result_len = strlen(result); 96 if (add_cr && result_len >= buflen) result_len = buflen-1; // truncate 97 } else if (format[0] == '%' && format[1] == 's' && format[2] == '\0') { 98 // trivial copy-through format string 99 result = va_arg(ap, const char*); 100 result_len = strlen(result); 101 if (add_cr && result_len >= buflen) result_len = buflen-1; // truncate 102 } else { 103 int required_len = os::vsnprintf(buffer, buflen, format, ap); 104 assert(required_len >= 0, "vsnprintf encoding error"); 105 result = buffer; 106 if ((size_t)required_len < buflen) { 107 result_len = required_len; 108 } else { 109 DEBUG_ONLY(warning("outputStream::do_vsnprintf output truncated -- buffer length is %d bytes but %d bytes are needed.", 110 add_cr ? (int)buflen + 1 : (int)buflen, add_cr ? required_len + 2 : required_len + 1);) 111 result_len = buflen - 1; 112 } 113 } 114 if (add_cr) { 115 if (result != buffer) { 116 memcpy(buffer, result, result_len); 117 result = buffer; 118 } 119 buffer[result_len++] = '\n'; 120 buffer[result_len] = 0; 121 } 122 return result; 123 } 124 125 void outputStream::do_vsnprintf_and_write_with_automatic_buffer(const char* format, va_list ap, bool add_cr) { 126 char buffer[O_BUFLEN]; 127 size_t len; 128 const char* str = do_vsnprintf(buffer, sizeof(buffer), format, ap, add_cr, len); 129 write(str, len); 130 } 131 132 void outputStream::do_vsnprintf_and_write_with_scratch_buffer(const char* format, va_list ap, bool add_cr) { 133 size_t len; 134 const char* str = do_vsnprintf(_scratch, _scratch_len, format, ap, add_cr, len); 135 write(str, len); 136 } 137 138 void outputStream::do_vsnprintf_and_write(const char* format, va_list ap, bool add_cr) { 139 if (_scratch) { 140 do_vsnprintf_and_write_with_scratch_buffer(format, ap, add_cr); 141 } else { 142 do_vsnprintf_and_write_with_automatic_buffer(format, ap, add_cr); 143 } 144 } 145 146 void outputStream::print(const char* format, ...) { 147 va_list ap; 148 va_start(ap, format); 149 do_vsnprintf_and_write(format, ap, false); 150 va_end(ap); 151 } 152 153 void outputStream::print_cr(const char* format, ...) { 154 va_list ap; 155 va_start(ap, format); 156 do_vsnprintf_and_write(format, ap, true); 157 va_end(ap); 158 } 159 160 void outputStream::vprint(const char *format, va_list argptr) { 161 do_vsnprintf_and_write(format, argptr, false); 162 } 163 164 void outputStream::vprint_cr(const char* format, va_list argptr) { 165 do_vsnprintf_and_write(format, argptr, true); 166 } 167 168 void outputStream::fill_to(int col) { 169 int need_fill = col - position(); 170 sp(need_fill); 171 } 172 173 void outputStream::move_to(int col, int slop, int min_space) { 174 if (position() >= col + slop) 175 cr(); 176 int need_fill = col - position(); 177 if (need_fill < min_space) 178 need_fill = min_space; 179 sp(need_fill); 180 } 181 182 void outputStream::put(char ch) { 183 assert(ch != 0, "please fix call site"); 184 char buf[] = { ch, '\0' }; 185 write(buf, 1); 186 } 187 188 #define SP_USE_TABS false 189 190 void outputStream::sp(int count) { 191 if (count < 0) return; 192 if (SP_USE_TABS && count >= 8) { 193 int target = position() + count; 194 while (count >= 8) { 195 this->write("\t", 1); 196 count -= 8; 197 } 198 count = target - position(); 199 } 200 while (count > 0) { 201 int nw = (count > 8) ? 8 : count; 202 this->write(" ", nw); 203 count -= nw; 204 } 205 } 206 207 void outputStream::cr() { 208 this->write("\n", 1); 209 } 210 211 void outputStream::cr_indent() { 212 cr(); indent(); 213 } 214 215 void outputStream::stamp() { 216 if (! _stamp.is_updated()) { 217 _stamp.update(); // start at 0 on first call to stamp() 218 } 219 220 // outputStream::stamp() may get called by ostream_abort(), use snprintf 221 // to avoid allocating large stack buffer in print(). 222 char buf[40]; 223 jio_snprintf(buf, sizeof(buf), "%.3f", _stamp.seconds()); 224 print_raw(buf); 225 } 226 227 void outputStream::stamp(bool guard, 228 const char* prefix, 229 const char* suffix) { 230 if (!guard) { 231 return; 232 } 233 print_raw(prefix); 234 stamp(); 235 print_raw(suffix); 236 } 237 238 void outputStream::date_stamp(bool guard, 239 const char* prefix, 240 const char* suffix) { 241 if (!guard) { 242 return; 243 } 244 print_raw(prefix); 245 static const char error_time[] = "yyyy-mm-ddThh:mm:ss.mmm+zzzz"; 246 static const int buffer_length = 32; 247 char buffer[buffer_length]; 248 const char* iso8601_result = os::iso8601_time(buffer, buffer_length); 249 if (iso8601_result != NULL) { 250 print_raw(buffer); 251 } else { 252 print_raw(error_time); 253 } 254 print_raw(suffix); 255 return; 256 } 257 258 outputStream& outputStream::indent() { 259 while (_position < _indentation) sp(); 260 return *this; 261 } 262 263 void outputStream::print_jlong(jlong value) { 264 print(JLONG_FORMAT, value); 265 } 266 267 void outputStream::print_julong(julong value) { 268 print(JULONG_FORMAT, value); 269 } 270 271 /** 272 * This prints out hex data in a 'windbg' or 'xxd' form, where each line is: 273 * <hex-address>: 8 * <hex-halfword> <ascii translation (optional)> 274 * example: 275 * 0000000: 7f44 4f46 0102 0102 0000 0000 0000 0000 .DOF............ 276 * 0000010: 0000 0000 0000 0040 0000 0020 0000 0005 .......@... .... 277 * 0000020: 0000 0000 0000 0040 0000 0000 0000 015d .......@.......] 278 * ... 279 * 280 * indent is applied to each line. Ends with a CR. 281 */ 282 void outputStream::print_data(void* data, size_t len, bool with_ascii) { 283 size_t limit = (len + 16) / 16 * 16; 284 for (size_t i = 0; i < limit; ++i) { 285 if (i % 16 == 0) { 286 indent().print(INTPTR_FORMAT_W(07) ":", i); 287 } 288 if (i % 2 == 0) { 289 print(" "); 290 } 291 if (i < len) { 292 print("%02x", ((unsigned char*)data)[i]); 293 } else { 294 print(" "); 295 } 296 if ((i + 1) % 16 == 0) { 297 if (with_ascii) { 298 print(" "); 299 for (size_t j = 0; j < 16; ++j) { 300 size_t idx = i + j - 15; 301 if (idx < len) { 302 char c = ((char*)data)[idx]; 303 print("%c", c >= 32 && c <= 126 ? c : '.'); 304 } 305 } 306 } 307 cr(); 308 } 309 } 310 } 311 312 stringStream::stringStream(size_t initial_size) : outputStream() { 313 buffer_length = initial_size; 314 buffer = NEW_C_HEAP_ARRAY(char, buffer_length, mtInternal); 315 buffer_pos = 0; 316 buffer_fixed = false; 317 zero_terminate(); 318 } 319 320 // useful for output to fixed chunks of memory, such as performance counters 321 stringStream::stringStream(char* fixed_buffer, size_t fixed_buffer_size) : outputStream() { 322 buffer_length = fixed_buffer_size; 323 buffer = fixed_buffer; 324 buffer_pos = 0; 325 buffer_fixed = true; 326 zero_terminate(); 327 } 328 329 void stringStream::write(const char* s, size_t len) { 330 size_t write_len = len; // number of non-null bytes to write 331 size_t end = buffer_pos + len + 1; // position after write and final '\0' 332 if (end > buffer_length) { 333 if (buffer_fixed) { 334 // if buffer cannot resize, silently truncate 335 end = buffer_length; 336 write_len = end - buffer_pos - 1; // leave room for the final '\0' 337 } else { 338 // For small overruns, double the buffer. For larger ones, 339 // increase to the requested size. 340 if (end < buffer_length * 2) { 341 end = buffer_length * 2; 342 } 343 buffer = REALLOC_C_HEAP_ARRAY(char, buffer, end, mtInternal); 344 buffer_length = end; 345 } 346 } 347 // invariant: buffer is always null-terminated 348 guarantee(buffer_pos + write_len + 1 <= buffer_length, "stringStream oob"); 349 if (write_len > 0) { 350 memcpy(buffer + buffer_pos, s, write_len); 351 buffer_pos += write_len; 352 zero_terminate(); 353 } 354 355 // Note that the following does not depend on write_len. 356 // This means that position and count get updated 357 // even when overflow occurs. 358 update_position(s, len); 359 } 360 361 void stringStream::zero_terminate() { 362 assert(buffer != NULL && 363 buffer_pos < buffer_length, "sanity"); 364 buffer[buffer_pos] = '\0'; 365 } 366 367 void stringStream::reset() { 368 buffer_pos = 0; _precount = 0; _position = 0; 369 zero_terminate(); 370 } 371 372 char* stringStream::as_string(bool c_heap) const { 373 char* copy = c_heap ? 374 NEW_C_HEAP_ARRAY(char, buffer_pos + 1, mtInternal) : NEW_RESOURCE_ARRAY(char, buffer_pos + 1); 375 strncpy(copy, buffer, buffer_pos); 376 copy[buffer_pos] = 0; // terminating null 377 if (c_heap) { 378 // Need to ensure our content is written to memory before we return 379 // the pointer to it. 380 OrderAccess::storestore(); 381 } 382 return copy; 383 } 384 385 stringStream::~stringStream() { 386 if (buffer_fixed == false && buffer != NULL) { 387 FREE_C_HEAP_ARRAY(char, buffer); 388 } 389 } 390 391 xmlStream* xtty; 392 outputStream* tty; 393 CDS_ONLY(fileStream* classlist_file;) // Only dump the classes that can be stored into the CDS archive 394 extern Mutex* tty_lock; 395 396 #define EXTRACHARLEN 32 397 #define CURRENTAPPX ".current" 398 // convert YYYY-MM-DD HH:MM:SS to YYYY-MM-DD_HH-MM-SS 399 char* get_datetime_string(char *buf, size_t len) { 400 os::local_time_string(buf, len); 401 int i = (int)strlen(buf); 402 while (--i >= 0) { 403 if (buf[i] == ' ') buf[i] = '_'; 404 else if (buf[i] == ':') buf[i] = '-'; 405 } 406 return buf; 407 } 408 409 static const char* make_log_name_internal(const char* log_name, const char* force_directory, 410 int pid, const char* tms) { 411 const char* basename = log_name; 412 char file_sep = os::file_separator()[0]; 413 const char* cp; 414 char pid_text[32]; 415 416 for (cp = log_name; *cp != '\0'; cp++) { 417 if (*cp == '/' || *cp == file_sep) { 418 basename = cp + 1; 419 } 420 } 421 const char* nametail = log_name; 422 // Compute buffer length 423 size_t buffer_length; 424 if (force_directory != NULL) { 425 buffer_length = strlen(force_directory) + strlen(os::file_separator()) + 426 strlen(basename) + 1; 427 } else { 428 buffer_length = strlen(log_name) + 1; 429 } 430 431 const char* pts = strstr(basename, "%p"); 432 int pid_pos = (pts == NULL) ? -1 : (pts - nametail); 433 434 if (pid_pos >= 0) { 435 jio_snprintf(pid_text, sizeof(pid_text), "pid%u", pid); 436 buffer_length += strlen(pid_text); 437 } 438 439 pts = strstr(basename, "%t"); 440 int tms_pos = (pts == NULL) ? -1 : (pts - nametail); 441 if (tms_pos >= 0) { 442 buffer_length += strlen(tms); 443 } 444 445 // File name is too long. 446 if (buffer_length > JVM_MAXPATHLEN) { 447 return NULL; 448 } 449 450 // Create big enough buffer. 451 char *buf = NEW_C_HEAP_ARRAY(char, buffer_length, mtInternal); 452 453 strcpy(buf, ""); 454 if (force_directory != NULL) { 455 strcat(buf, force_directory); 456 strcat(buf, os::file_separator()); 457 nametail = basename; // completely skip directory prefix 458 } 459 460 // who is first, %p or %t? 461 int first = -1, second = -1; 462 const char *p1st = NULL; 463 const char *p2nd = NULL; 464 465 if (pid_pos >= 0 && tms_pos >= 0) { 466 // contains both %p and %t 467 if (pid_pos < tms_pos) { 468 // case foo%pbar%tmonkey.log 469 first = pid_pos; 470 p1st = pid_text; 471 second = tms_pos; 472 p2nd = tms; 473 } else { 474 // case foo%tbar%pmonkey.log 475 first = tms_pos; 476 p1st = tms; 477 second = pid_pos; 478 p2nd = pid_text; 479 } 480 } else if (pid_pos >= 0) { 481 // contains %p only 482 first = pid_pos; 483 p1st = pid_text; 484 } else if (tms_pos >= 0) { 485 // contains %t only 486 first = tms_pos; 487 p1st = tms; 488 } 489 490 int buf_pos = (int)strlen(buf); 491 const char* tail = nametail; 492 493 if (first >= 0) { 494 tail = nametail + first + 2; 495 strncpy(&buf[buf_pos], nametail, first); 496 strcpy(&buf[buf_pos + first], p1st); 497 buf_pos = (int)strlen(buf); 498 if (second >= 0) { 499 strncpy(&buf[buf_pos], tail, second - first - 2); 500 strcpy(&buf[buf_pos + second - first - 2], p2nd); 501 tail = nametail + second + 2; 502 } 503 } 504 strcat(buf, tail); // append rest of name, or all of name 505 return buf; 506 } 507 508 // log_name comes from -XX:LogFile=log_name or 509 // -XX:DumpLoadedClassList=<file_name> 510 // in log_name, %p => pid1234 and 511 // %t => YYYY-MM-DD_HH-MM-SS 512 static const char* make_log_name(const char* log_name, const char* force_directory) { 513 char timestr[32]; 514 get_datetime_string(timestr, sizeof(timestr)); 515 return make_log_name_internal(log_name, force_directory, os::current_process_id(), 516 timestr); 517 } 518 519 fileStream::fileStream(const char* file_name) { 520 _file = fopen(file_name, "w"); 521 if (_file != NULL) { 522 _need_close = true; 523 } else { 524 warning("Cannot open file %s due to %s\n", file_name, os::strerror(errno)); 525 _need_close = false; 526 } 527 } 528 529 fileStream::fileStream(const char* file_name, const char* opentype) { 530 _file = fopen(file_name, opentype); 531 if (_file != NULL) { 532 _need_close = true; 533 } else { 534 warning("Cannot open file %s due to %s\n", file_name, os::strerror(errno)); 535 _need_close = false; 536 } 537 } 538 539 void fileStream::write(const char* s, size_t len) { 540 if (_file != NULL) { 541 // Make an unused local variable to avoid warning from gcc compiler. 542 size_t count = fwrite(s, 1, len, _file); 543 } 544 update_position(s, len); 545 } 546 547 long fileStream::fileSize() { 548 long size = -1; 549 if (_file != NULL) { 550 long pos = ::ftell(_file); 551 if (pos < 0) return pos; 552 if (::fseek(_file, 0, SEEK_END) == 0) { 553 size = ::ftell(_file); 554 } 555 ::fseek(_file, pos, SEEK_SET); 556 } 557 return size; 558 } 559 560 char* fileStream::readln(char *data, int count ) { 561 char * ret = ::fgets(data, count, _file); 562 //Get rid of annoying \n char 563 data[::strlen(data)-1] = '\0'; 564 return ret; 565 } 566 567 fileStream::~fileStream() { 568 if (_file != NULL) { 569 if (_need_close) fclose(_file); 570 _file = NULL; 571 } 572 } 573 574 void fileStream::flush() { 575 fflush(_file); 576 } 577 578 void fdStream::write(const char* s, size_t len) { 579 if (_fd != -1) { 580 // Make an unused local variable to avoid warning from gcc compiler. 581 size_t count = ::write(_fd, s, (int)len); 582 } 583 update_position(s, len); 584 } 585 586 defaultStream* defaultStream::instance = NULL; 587 int defaultStream::_output_fd = 1; 588 int defaultStream::_error_fd = 2; 589 FILE* defaultStream::_output_stream = stdout; 590 FILE* defaultStream::_error_stream = stderr; 591 592 #define LOG_MAJOR_VERSION 160 593 #define LOG_MINOR_VERSION 1 594 595 void defaultStream::init() { 596 _inited = true; 597 if (LogVMOutput || LogCompilation) { 598 init_log(); 599 } 600 } 601 602 bool defaultStream::has_log_file() { 603 // lazily create log file (at startup, LogVMOutput is false even 604 // if +LogVMOutput is used, because the flags haven't been parsed yet) 605 // For safer printing during fatal error handling, do not init logfile 606 // if a VM error has been reported. 607 if (!_inited && !VMError::is_error_reported()) init(); 608 return _log_file != NULL; 609 } 610 611 fileStream* defaultStream::open_file(const char* log_name) { 612 const char* try_name = make_log_name(log_name, NULL); 613 if (try_name == NULL) { 614 warning("Cannot open file %s: file name is too long.\n", log_name); 615 return NULL; 616 } 617 618 fileStream* file = new(ResourceObj::C_HEAP, mtInternal) fileStream(try_name); 619 FREE_C_HEAP_ARRAY(char, try_name); 620 if (file->is_open()) { 621 return file; 622 } 623 624 // Try again to open the file in the temp directory. 625 delete file; 626 // Note: This feature is for maintainer use only. No need for L10N. 627 jio_printf("Warning: Cannot open log file: %s\n", log_name); 628 try_name = make_log_name(log_name, os::get_temp_directory()); 629 if (try_name == NULL) { 630 warning("Cannot open file %s: file name is too long for directory %s.\n", log_name, os::get_temp_directory()); 631 return NULL; 632 } 633 634 jio_printf("Warning: Forcing option -XX:LogFile=%s\n", try_name); 635 636 file = new(ResourceObj::C_HEAP, mtInternal) fileStream(try_name); 637 FREE_C_HEAP_ARRAY(char, try_name); 638 if (file->is_open()) { 639 return file; 640 } 641 642 delete file; 643 return NULL; 644 } 645 646 void defaultStream::init_log() { 647 // %%% Need a MutexLocker? 648 const char* log_name = LogFile != NULL ? LogFile : "hotspot_%p.log"; 649 fileStream* file = open_file(log_name); 650 651 if (file != NULL) { 652 _log_file = file; 653 _outer_xmlStream = new(ResourceObj::C_HEAP, mtInternal) xmlStream(file); 654 start_log(); 655 } else { 656 // and leave xtty as NULL 657 LogVMOutput = false; 658 DisplayVMOutput = true; 659 LogCompilation = false; 660 } 661 } 662 663 void defaultStream::start_log() { 664 xmlStream*xs = _outer_xmlStream; 665 if (this == tty) xtty = xs; 666 // Write XML header. 667 xs->print_cr("<?xml version='1.0' encoding='UTF-8'?>"); 668 // (For now, don't bother to issue a DTD for this private format.) 669 670 // Calculate the start time of the log as ms since the epoch: this is 671 // the current time in ms minus the uptime in ms. 672 jlong time_ms = os::javaTimeMillis() - tty->time_stamp().milliseconds(); 673 xs->head("hotspot_log version='%d %d'" 674 " process='%d' time_ms='" INT64_FORMAT "'", 675 LOG_MAJOR_VERSION, LOG_MINOR_VERSION, 676 os::current_process_id(), (int64_t)time_ms); 677 // Write VM version header immediately. 678 xs->head("vm_version"); 679 xs->head("name"); xs->text("%s", VM_Version::vm_name()); xs->cr(); 680 xs->tail("name"); 681 xs->head("release"); xs->text("%s", VM_Version::vm_release()); xs->cr(); 682 xs->tail("release"); 683 xs->head("info"); xs->text("%s", VM_Version::internal_vm_info_string()); xs->cr(); 684 xs->tail("info"); 685 xs->tail("vm_version"); 686 // Record information about the command-line invocation. 687 xs->head("vm_arguments"); // Cf. Arguments::print_on() 688 if (Arguments::num_jvm_flags() > 0) { 689 xs->head("flags"); 690 Arguments::print_jvm_flags_on(xs->text()); 691 xs->tail("flags"); 692 } 693 if (Arguments::num_jvm_args() > 0) { 694 xs->head("args"); 695 Arguments::print_jvm_args_on(xs->text()); 696 xs->tail("args"); 697 } 698 if (Arguments::java_command() != NULL) { 699 xs->head("command"); xs->text()->print_cr("%s", Arguments::java_command()); 700 xs->tail("command"); 701 } 702 if (Arguments::sun_java_launcher() != NULL) { 703 xs->head("launcher"); xs->text()->print_cr("%s", Arguments::sun_java_launcher()); 704 xs->tail("launcher"); 705 } 706 if (Arguments::system_properties() != NULL) { 707 xs->head("properties"); 708 // Print it as a java-style property list. 709 // System properties don't generally contain newlines, so don't bother with unparsing. 710 outputStream *text = xs->text(); 711 for (SystemProperty* p = Arguments::system_properties(); p != NULL; p = p->next()) { 712 assert(p->key() != NULL, "p->key() is NULL"); 713 if (p->is_readable()) { 714 // Print in two stages to avoid problems with long 715 // keys/values. 716 text->print_raw(p->key()); 717 text->put('='); 718 assert(p->value() != NULL, "p->value() is NULL"); 719 text->print_raw_cr(p->value()); 720 } 721 } 722 xs->tail("properties"); 723 } 724 xs->tail("vm_arguments"); 725 // tty output per se is grouped under the <tty>...</tty> element. 726 xs->head("tty"); 727 // All further non-markup text gets copied to the tty: 728 xs->_text = this; // requires friend declaration! 729 } 730 731 // finish_log() is called during normal VM shutdown. finish_log_on_error() is 732 // called by ostream_abort() after a fatal error. 733 // 734 void defaultStream::finish_log() { 735 xmlStream* xs = _outer_xmlStream; 736 xs->done("tty"); 737 738 // Other log forks are appended here, at the End of Time: 739 CompileLog::finish_log(xs->out()); // write compile logging, if any, now 740 741 xs->done("hotspot_log"); 742 xs->flush(); 743 744 fileStream* file = _log_file; 745 _log_file = NULL; 746 747 delete _outer_xmlStream; 748 _outer_xmlStream = NULL; 749 750 file->flush(); 751 delete file; 752 } 753 754 void defaultStream::finish_log_on_error(char *buf, int buflen) { 755 xmlStream* xs = _outer_xmlStream; 756 757 if (xs && xs->out()) { 758 759 xs->done_raw("tty"); 760 761 // Other log forks are appended here, at the End of Time: 762 CompileLog::finish_log_on_error(xs->out(), buf, buflen); // write compile logging, if any, now 763 764 xs->done_raw("hotspot_log"); 765 xs->flush(); 766 767 fileStream* file = _log_file; 768 _log_file = NULL; 769 _outer_xmlStream = NULL; 770 771 if (file) { 772 file->flush(); 773 774 // Can't delete or close the file because delete and fclose aren't 775 // async-safe. We are about to die, so leave it to the kernel. 776 // delete file; 777 } 778 } 779 } 780 781 intx defaultStream::hold(intx writer_id) { 782 bool has_log = has_log_file(); // check before locking 783 if (// impossible, but who knows? 784 writer_id == NO_WRITER || 785 786 // bootstrap problem 787 tty_lock == NULL || 788 789 // can't grab a lock if current Thread isn't set 790 Thread::current_or_null() == NULL || 791 792 // developer hook 793 !SerializeVMOutput || 794 795 // VM already unhealthy 796 VMError::is_error_reported() || 797 798 // safepoint == global lock (for VM only) 799 (SafepointSynchronize::is_synchronizing() && 800 Thread::current()->is_VM_thread()) 801 ) { 802 // do not attempt to lock unless we know the thread and the VM is healthy 803 return NO_WRITER; 804 } 805 if (_writer == writer_id) { 806 // already held, no need to re-grab the lock 807 return NO_WRITER; 808 } 809 tty_lock->lock_without_safepoint_check(); 810 // got the lock 811 if (writer_id != _last_writer) { 812 if (has_log) { 813 _log_file->bol(); 814 // output a hint where this output is coming from: 815 _log_file->print_cr("<writer thread='" UINTX_FORMAT "'/>", writer_id); 816 } 817 _last_writer = writer_id; 818 } 819 _writer = writer_id; 820 return writer_id; 821 } 822 823 void defaultStream::release(intx holder) { 824 if (holder == NO_WRITER) { 825 // nothing to release: either a recursive lock, or we scribbled (too bad) 826 return; 827 } 828 if (_writer != holder) { 829 return; // already unlocked, perhaps via break_tty_lock_for_safepoint 830 } 831 _writer = NO_WRITER; 832 tty_lock->unlock(); 833 } 834 835 void defaultStream::write(const char* s, size_t len) { 836 intx thread_id = os::current_thread_id(); 837 intx holder = hold(thread_id); 838 839 if (DisplayVMOutput && 840 (_outer_xmlStream == NULL || !_outer_xmlStream->inside_attrs())) { 841 // print to output stream. It can be redirected by a vfprintf hook 842 jio_print(s, len); 843 } 844 845 // print to log file 846 if (has_log_file()) { 847 int nl0 = _newlines; 848 xmlTextStream::write(s, len); 849 // flush the log file too, if there were any newlines 850 if (nl0 != _newlines){ 851 flush(); 852 } 853 } else { 854 update_position(s, len); 855 } 856 857 release(holder); 858 } 859 860 intx ttyLocker::hold_tty() { 861 if (defaultStream::instance == NULL) return defaultStream::NO_WRITER; 862 intx thread_id = os::current_thread_id(); 863 return defaultStream::instance->hold(thread_id); 864 } 865 866 void ttyLocker::release_tty(intx holder) { 867 if (holder == defaultStream::NO_WRITER) return; 868 defaultStream::instance->release(holder); 869 } 870 871 bool ttyLocker::release_tty_if_locked() { 872 intx thread_id = os::current_thread_id(); 873 if (defaultStream::instance->writer() == thread_id) { 874 // release the lock and return true so callers know if was 875 // previously held. 876 release_tty(thread_id); 877 return true; 878 } 879 return false; 880 } 881 882 void ttyLocker::break_tty_lock_for_safepoint(intx holder) { 883 if (defaultStream::instance != NULL && 884 defaultStream::instance->writer() == holder) { 885 if (xtty != NULL) { 886 xtty->print_cr("<!-- safepoint while printing -->"); 887 } 888 defaultStream::instance->release(holder); 889 } 890 // (else there was no lock to break) 891 } 892 893 void ostream_init() { 894 if (defaultStream::instance == NULL) { 895 defaultStream::instance = new(ResourceObj::C_HEAP, mtInternal) defaultStream(); 896 tty = defaultStream::instance; 897 898 // We want to ensure that time stamps in GC logs consider time 0 899 // the time when the JVM is initialized, not the first time we ask 900 // for a time stamp. So, here, we explicitly update the time stamp 901 // of tty. 902 tty->time_stamp().update_to(1); 903 } 904 } 905 906 void ostream_init_log() { 907 // Note : this must be called AFTER ostream_init() 908 909 #if INCLUDE_CDS 910 // For -XX:DumpLoadedClassList=<file> option 911 if (DumpLoadedClassList != NULL) { 912 const char* list_name = make_log_name(DumpLoadedClassList, NULL); 913 classlist_file = new(ResourceObj::C_HEAP, mtInternal) 914 fileStream(list_name); 915 FREE_C_HEAP_ARRAY(char, list_name); 916 } 917 #endif 918 919 // If we haven't lazily initialized the logfile yet, do it now, 920 // to avoid the possibility of lazy initialization during a VM 921 // crash, which can affect the stability of the fatal error handler. 922 defaultStream::instance->has_log_file(); 923 } 924 925 // ostream_exit() is called during normal VM exit to finish log files, flush 926 // output and free resource. 927 void ostream_exit() { 928 static bool ostream_exit_called = false; 929 if (ostream_exit_called) return; 930 ostream_exit_called = true; 931 #if INCLUDE_CDS 932 if (classlist_file != NULL) { 933 delete classlist_file; 934 } 935 #endif 936 if (tty != defaultStream::instance) { 937 delete tty; 938 } 939 if (defaultStream::instance != NULL) { 940 delete defaultStream::instance; 941 } 942 tty = NULL; 943 xtty = NULL; 944 defaultStream::instance = NULL; 945 } 946 947 // ostream_abort() is called by os::abort() when VM is about to die. 948 void ostream_abort() { 949 // Here we can't delete tty, just flush its output 950 if (tty) tty->flush(); 951 952 if (defaultStream::instance != NULL) { 953 static char buf[4096]; 954 defaultStream::instance->finish_log_on_error(buf, sizeof(buf)); 955 } 956 } 957 958 bufferedStream::bufferedStream(size_t initial_size, size_t bufmax) : outputStream() { 959 buffer_length = initial_size; 960 buffer = NEW_C_HEAP_ARRAY(char, buffer_length, mtInternal); 961 buffer_pos = 0; 962 buffer_fixed = false; 963 buffer_max = bufmax; 964 truncated = false; 965 } 966 967 bufferedStream::bufferedStream(char* fixed_buffer, size_t fixed_buffer_size, size_t bufmax) : outputStream() { 968 buffer_length = fixed_buffer_size; 969 buffer = fixed_buffer; 970 buffer_pos = 0; 971 buffer_fixed = true; 972 buffer_max = bufmax; 973 truncated = false; 974 } 975 976 void bufferedStream::write(const char* s, size_t len) { 977 978 if (truncated) { 979 return; 980 } 981 982 if(buffer_pos + len > buffer_max) { 983 flush(); // Note: may be a noop. 984 } 985 986 size_t end = buffer_pos + len; 987 if (end >= buffer_length) { 988 if (buffer_fixed) { 989 // if buffer cannot resize, silently truncate 990 len = buffer_length - buffer_pos - 1; 991 truncated = true; 992 } else { 993 // For small overruns, double the buffer. For larger ones, 994 // increase to the requested size. 995 if (end < buffer_length * 2) { 996 end = buffer_length * 2; 997 } 998 // Impose a cap beyond which the buffer cannot grow - a size which 999 // in all probability indicates a real error, e.g. faulty printing 1000 // code looping, while not affecting cases of just-very-large-but-its-normal 1001 // output. 1002 const size_t reasonable_cap = MAX2(100 * M, buffer_max * 2); 1003 if (end > reasonable_cap) { 1004 // In debug VM, assert right away. 1005 assert(false, "Exceeded max buffer size for this string."); 1006 // Release VM: silently truncate. We do this since these kind of errors 1007 // are both difficult to predict with testing (depending on logging content) 1008 // and usually not serious enough to kill a production VM for it. 1009 end = reasonable_cap; 1010 size_t remaining = end - buffer_pos; 1011 if (len >= remaining) { 1012 len = remaining - 1; 1013 truncated = true; 1014 } 1015 } 1016 if (buffer_length < end) { 1017 buffer = REALLOC_C_HEAP_ARRAY(char, buffer, end, mtInternal); 1018 buffer_length = end; 1019 } 1020 } 1021 } 1022 if (len > 0) { 1023 memcpy(buffer + buffer_pos, s, len); 1024 buffer_pos += len; 1025 update_position(s, len); 1026 } 1027 } 1028 1029 char* bufferedStream::as_string() { 1030 char* copy = NEW_RESOURCE_ARRAY(char, buffer_pos+1); 1031 strncpy(copy, buffer, buffer_pos); 1032 copy[buffer_pos] = 0; // terminating null 1033 return copy; 1034 } 1035 1036 bufferedStream::~bufferedStream() { 1037 if (!buffer_fixed) { 1038 FREE_C_HEAP_ARRAY(char, buffer); 1039 } 1040 } 1041 1042 #ifndef PRODUCT 1043 1044 #if defined(SOLARIS) || defined(LINUX) || defined(AIX) || defined(_ALLBSD_SOURCE) 1045 #include <sys/types.h> 1046 #include <sys/socket.h> 1047 #include <netinet/in.h> 1048 #include <arpa/inet.h> 1049 #elif defined(_WINDOWS) 1050 #include <winsock2.h> 1051 #endif 1052 1053 // Network access 1054 networkStream::networkStream() : bufferedStream(1024*10, 1024*10) { 1055 1056 _socket = -1; 1057 1058 int result = os::socket(AF_INET, SOCK_STREAM, 0); 1059 if (result <= 0) { 1060 assert(false, "Socket could not be created!"); 1061 } else { 1062 _socket = result; 1063 } 1064 } 1065 1066 int networkStream::read(char *buf, size_t len) { 1067 return os::recv(_socket, buf, (int)len, 0); 1068 } 1069 1070 void networkStream::flush() { 1071 if (size() != 0) { 1072 int result = os::raw_send(_socket, (char *)base(), size(), 0); 1073 assert(result != -1, "connection error"); 1074 assert(result == (int)size(), "didn't send enough data"); 1075 } 1076 reset(); 1077 } 1078 1079 networkStream::~networkStream() { 1080 close(); 1081 } 1082 1083 void networkStream::close() { 1084 if (_socket != -1) { 1085 flush(); 1086 os::socket_close(_socket); 1087 _socket = -1; 1088 } 1089 } 1090 1091 bool networkStream::connect(const char *ip, short port) { 1092 1093 struct sockaddr_in server; 1094 server.sin_family = AF_INET; 1095 server.sin_port = htons(port); 1096 1097 server.sin_addr.s_addr = inet_addr(ip); 1098 if (server.sin_addr.s_addr == (uint32_t)-1) { 1099 struct hostent* host = os::get_host_by_name((char*)ip); 1100 if (host != NULL) { 1101 memcpy(&server.sin_addr, host->h_addr_list[0], host->h_length); 1102 } else { 1103 return false; 1104 } 1105 } 1106 1107 1108 int result = os::connect(_socket, (struct sockaddr*)&server, sizeof(struct sockaddr_in)); 1109 return (result >= 0); 1110 } 1111 1112 #endif