1 /* 2 * Copyright (c) 1997, 2019, 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/vm_version.hpp" 33 #include "utilities/defaultStream.hpp" 34 #include "utilities/macros.hpp" 35 #include "utilities/ostream.hpp" 36 #include "utilities/vmError.hpp" 37 #include "utilities/xmlstream.hpp" 38 39 // Declarations of jvm methods 40 extern "C" void jio_print(const char* s, size_t len); 41 extern "C" int jio_printf(const char *fmt, ...); 42 43 outputStream::outputStream(int width) { 44 _width = width; 45 _position = 0; 46 _newlines = 0; 47 _precount = 0; 48 _indentation = 0; 49 _scratch = NULL; 50 _scratch_len = 0; 51 } 52 53 outputStream::outputStream(int width, bool has_time_stamps) { 54 _width = width; 55 _position = 0; 56 _newlines = 0; 57 _precount = 0; 58 _indentation = 0; 59 _scratch = NULL; 60 _scratch_len = 0; 61 if (has_time_stamps) _stamp.update(); 62 } 63 64 void outputStream::update_position(const char* s, size_t len) { 65 for (size_t i = 0; i < len; i++) { 66 char ch = s[i]; 67 if (ch == '\n') { 68 _newlines += 1; 69 _precount += _position + 1; 70 _position = 0; 71 } else if (ch == '\t') { 72 int tw = 8 - (_position & 7); 73 _position += tw; 74 _precount -= tw-1; // invariant: _precount + _position == total count 75 } else { 76 _position += 1; 77 } 78 } 79 } 80 81 // Execute a vsprintf, using the given buffer if necessary. 82 // Return a pointer to the formatted string. 83 const char* outputStream::do_vsnprintf(char* buffer, size_t buflen, 84 const char* format, va_list ap, 85 bool add_cr, 86 size_t& result_len) { 87 assert(buflen >= 2, "buffer too small"); 88 89 const char* result; 90 if (add_cr) buflen--; 91 if (!strchr(format, '%')) { 92 // constant format string 93 result = format; 94 result_len = strlen(result); 95 if (add_cr && result_len >= buflen) result_len = buflen-1; // truncate 96 } else if (format[0] == '%' && format[1] == 's' && format[2] == '\0') { 97 // trivial copy-through format string 98 result = va_arg(ap, const char*); 99 result_len = strlen(result); 100 if (add_cr && result_len >= buflen) result_len = buflen-1; // truncate 101 } else { 102 int written = os::vsnprintf(buffer, buflen, format, ap); 103 assert(written >= 0, "vsnprintf encoding error"); 104 result = buffer; 105 if ((size_t)written < buflen) { 106 result_len = written; 107 } else { 108 DEBUG_ONLY(warning("increase O_BUFLEN in ostream.hpp -- output truncated");) 109 result_len = buflen - 1; 110 } 111 } 112 if (add_cr) { 113 if (result != buffer) { 114 memcpy(buffer, result, result_len); 115 result = buffer; 116 } 117 buffer[result_len++] = '\n'; 118 buffer[result_len] = 0; 119 } 120 return result; 121 } 122 123 void outputStream::do_vsnprintf_and_write_with_automatic_buffer(const char* format, va_list ap, bool add_cr) { 124 char buffer[O_BUFLEN]; 125 size_t len; 126 const char* str = do_vsnprintf(buffer, sizeof(buffer), format, ap, add_cr, len); 127 write(str, len); 128 } 129 130 void outputStream::do_vsnprintf_and_write_with_scratch_buffer(const char* format, va_list ap, bool add_cr) { 131 size_t len; 132 const char* str = do_vsnprintf(_scratch, _scratch_len, format, ap, add_cr, len); 133 write(str, len); 134 } 135 136 void outputStream::do_vsnprintf_and_write(const char* format, va_list ap, bool add_cr) { 137 if (_scratch) { 138 do_vsnprintf_and_write_with_scratch_buffer(format, ap, add_cr); 139 } else { 140 do_vsnprintf_and_write_with_automatic_buffer(format, ap, add_cr); 141 } 142 } 143 144 void outputStream::print(const char* format, ...) { 145 va_list ap; 146 va_start(ap, format); 147 do_vsnprintf_and_write(format, ap, false); 148 va_end(ap); 149 } 150 151 void outputStream::print_cr(const char* format, ...) { 152 va_list ap; 153 va_start(ap, format); 154 do_vsnprintf_and_write(format, ap, true); 155 va_end(ap); 156 } 157 158 void outputStream::vprint(const char *format, va_list argptr) { 159 do_vsnprintf_and_write(format, argptr, false); 160 } 161 162 void outputStream::vprint_cr(const char* format, va_list argptr) { 163 do_vsnprintf_and_write(format, argptr, true); 164 } 165 166 void outputStream::fill_to(int col) { 167 int need_fill = col - position(); 168 sp(need_fill); 169 } 170 171 void outputStream::move_to(int col, int slop, int min_space) { 172 if (position() >= col + slop) 173 cr(); 174 int need_fill = col - position(); 175 if (need_fill < min_space) 176 need_fill = min_space; 177 sp(need_fill); 178 } 179 180 void outputStream::put(char ch) { 181 assert(ch != 0, "please fix call site"); 182 char buf[] = { ch, '\0' }; 183 write(buf, 1); 184 } 185 186 #define SP_USE_TABS false 187 188 void outputStream::sp(int count) { 189 if (count < 0) return; 190 if (SP_USE_TABS && count >= 8) { 191 int target = position() + count; 192 while (count >= 8) { 193 this->write("\t", 1); 194 count -= 8; 195 } 196 count = target - position(); 197 } 198 while (count > 0) { 199 int nw = (count > 8) ? 8 : count; 200 this->write(" ", nw); 201 count -= nw; 202 } 203 } 204 205 void outputStream::cr() { 206 this->write("\n", 1); 207 } 208 209 void outputStream::cr_indent() { 210 cr(); indent(); 211 } 212 213 void outputStream::stamp() { 214 if (! _stamp.is_updated()) { 215 _stamp.update(); // start at 0 on first call to stamp() 216 } 217 218 // outputStream::stamp() may get called by ostream_abort(), use snprintf 219 // to avoid allocating large stack buffer in print(). 220 char buf[40]; 221 jio_snprintf(buf, sizeof(buf), "%.3f", _stamp.seconds()); 222 print_raw(buf); 223 } 224 225 void outputStream::stamp(bool guard, 226 const char* prefix, 227 const char* suffix) { 228 if (!guard) { 229 return; 230 } 231 print_raw(prefix); 232 stamp(); 233 print_raw(suffix); 234 } 235 236 void outputStream::date_stamp(bool guard, 237 const char* prefix, 238 const char* suffix) { 239 if (!guard) { 240 return; 241 } 242 print_raw(prefix); 243 static const char error_time[] = "yyyy-mm-ddThh:mm:ss.mmm+zzzz"; 244 static const int buffer_length = 32; 245 char buffer[buffer_length]; 246 const char* iso8601_result = os::iso8601_time(buffer, buffer_length); 247 if (iso8601_result != NULL) { 248 print_raw(buffer); 249 } else { 250 print_raw(error_time); 251 } 252 print_raw(suffix); 253 return; 254 } 255 256 outputStream& outputStream::indent() { 257 while (_position < _indentation) sp(); 258 return *this; 259 } 260 261 void outputStream::print_jlong(jlong value) { 262 print(JLONG_FORMAT, value); 263 } 264 265 void outputStream::print_julong(julong value) { 266 print(JULONG_FORMAT, value); 267 } 268 269 /** 270 * This prints out hex data in a 'windbg' or 'xxd' form, where each line is: 271 * <hex-address>: 8 * <hex-halfword> <ascii translation (optional)> 272 * example: 273 * 0000000: 7f44 4f46 0102 0102 0000 0000 0000 0000 .DOF............ 274 * 0000010: 0000 0000 0000 0040 0000 0020 0000 0005 .......@... .... 275 * 0000020: 0000 0000 0000 0040 0000 0000 0000 015d .......@.......] 276 * ... 277 * 278 * indent is applied to each line. Ends with a CR. 279 */ 280 void outputStream::print_data(void* data, size_t len, bool with_ascii) { 281 size_t limit = (len + 16) / 16 * 16; 282 for (size_t i = 0; i < limit; ++i) { 283 if (i % 16 == 0) { 284 indent().print(INTPTR_FORMAT_W(07) ":", i); 285 } 286 if (i % 2 == 0) { 287 print(" "); 288 } 289 if (i < len) { 290 print("%02x", ((unsigned char*)data)[i]); 291 } else { 292 print(" "); 293 } 294 if ((i + 1) % 16 == 0) { 295 if (with_ascii) { 296 print(" "); 297 for (size_t j = 0; j < 16; ++j) { 298 size_t idx = i + j - 15; 299 if (idx < len) { 300 char c = ((char*)data)[idx]; 301 print("%c", c >= 32 && c <= 126 ? c : '.'); 302 } 303 } 304 } 305 cr(); 306 } 307 } 308 } 309 310 stringStream::stringStream(size_t initial_size) : outputStream() { 311 buffer_length = initial_size; 312 buffer = NEW_C_HEAP_ARRAY(char, buffer_length, mtInternal); 313 buffer_pos = 0; 314 buffer_fixed = false; 315 zero_terminate(); 316 } 317 318 // useful for output to fixed chunks of memory, such as performance counters 319 stringStream::stringStream(char* fixed_buffer, size_t fixed_buffer_size) : outputStream() { 320 buffer_length = fixed_buffer_size; 321 buffer = fixed_buffer; 322 buffer_pos = 0; 323 buffer_fixed = true; 324 zero_terminate(); 325 } 326 327 void stringStream::write(const char* s, size_t len) { 328 size_t write_len = len; // number of non-null bytes to write 329 size_t end = buffer_pos + len + 1; // position after write and final '\0' 330 if (end > buffer_length) { 331 if (buffer_fixed) { 332 // if buffer cannot resize, silently truncate 333 end = buffer_length; 334 write_len = end - buffer_pos - 1; // leave room for the final '\0' 335 } else { 336 // For small overruns, double the buffer. For larger ones, 337 // increase to the requested size. 338 if (end < buffer_length * 2) { 339 end = buffer_length * 2; 340 } 341 buffer = REALLOC_C_HEAP_ARRAY(char, buffer, end, mtInternal); 342 buffer_length = end; 343 } 344 } 345 // invariant: buffer is always null-terminated 346 guarantee(buffer_pos + write_len + 1 <= buffer_length, "stringStream oob"); 347 if (write_len > 0) { 348 memcpy(buffer + buffer_pos, s, write_len); 349 buffer_pos += write_len; 350 zero_terminate(); 351 } 352 353 // Note that the following does not depend on write_len. 354 // This means that position and count get updated 355 // even when overflow occurs. 356 update_position(s, len); 357 } 358 359 void stringStream::zero_terminate() { 360 assert(buffer != NULL && 361 buffer_pos < buffer_length, "sanity"); 362 buffer[buffer_pos] = '\0'; 363 } 364 365 void stringStream::reset() { 366 buffer_pos = 0; _precount = 0; _position = 0; 367 zero_terminate(); 368 } 369 370 char* stringStream::as_string() const { 371 char* copy = NEW_RESOURCE_ARRAY(char, buffer_pos + 1); 372 strncpy(copy, buffer, buffer_pos); 373 copy[buffer_pos] = 0; // terminating null 374 return copy; 375 } 376 377 stringStream::~stringStream() { 378 if (buffer_fixed == false && buffer != NULL) { 379 FREE_C_HEAP_ARRAY(char, buffer); 380 } 381 } 382 383 xmlStream* xtty; 384 outputStream* tty; 385 CDS_ONLY(fileStream* classlist_file;) // Only dump the classes that can be stored into the CDS archive 386 extern Mutex* tty_lock; 387 388 #define EXTRACHARLEN 32 389 #define CURRENTAPPX ".current" 390 // convert YYYY-MM-DD HH:MM:SS to YYYY-MM-DD_HH-MM-SS 391 char* get_datetime_string(char *buf, size_t len) { 392 os::local_time_string(buf, len); 393 int i = (int)strlen(buf); 394 while (--i >= 0) { 395 if (buf[i] == ' ') buf[i] = '_'; 396 else if (buf[i] == ':') buf[i] = '-'; 397 } 398 return buf; 399 } 400 401 static const char* make_log_name_internal(const char* log_name, const char* force_directory, 402 int pid, const char* tms) { 403 const char* basename = log_name; 404 char file_sep = os::file_separator()[0]; 405 const char* cp; 406 char pid_text[32]; 407 408 for (cp = log_name; *cp != '\0'; cp++) { 409 if (*cp == '/' || *cp == file_sep) { 410 basename = cp + 1; 411 } 412 } 413 const char* nametail = log_name; 414 // Compute buffer length 415 size_t buffer_length; 416 if (force_directory != NULL) { 417 buffer_length = strlen(force_directory) + strlen(os::file_separator()) + 418 strlen(basename) + 1; 419 } else { 420 buffer_length = strlen(log_name) + 1; 421 } 422 423 const char* pts = strstr(basename, "%p"); 424 int pid_pos = (pts == NULL) ? -1 : (pts - nametail); 425 426 if (pid_pos >= 0) { 427 jio_snprintf(pid_text, sizeof(pid_text), "pid%u", pid); 428 buffer_length += strlen(pid_text); 429 } 430 431 pts = strstr(basename, "%t"); 432 int tms_pos = (pts == NULL) ? -1 : (pts - nametail); 433 if (tms_pos >= 0) { 434 buffer_length += strlen(tms); 435 } 436 437 // File name is too long. 438 if (buffer_length > JVM_MAXPATHLEN) { 439 return NULL; 440 } 441 442 // Create big enough buffer. 443 char *buf = NEW_C_HEAP_ARRAY(char, buffer_length, mtInternal); 444 445 strcpy(buf, ""); 446 if (force_directory != NULL) { 447 strcat(buf, force_directory); 448 strcat(buf, os::file_separator()); 449 nametail = basename; // completely skip directory prefix 450 } 451 452 // who is first, %p or %t? 453 int first = -1, second = -1; 454 const char *p1st = NULL; 455 const char *p2nd = NULL; 456 457 if (pid_pos >= 0 && tms_pos >= 0) { 458 // contains both %p and %t 459 if (pid_pos < tms_pos) { 460 // case foo%pbar%tmonkey.log 461 first = pid_pos; 462 p1st = pid_text; 463 second = tms_pos; 464 p2nd = tms; 465 } else { 466 // case foo%tbar%pmonkey.log 467 first = tms_pos; 468 p1st = tms; 469 second = pid_pos; 470 p2nd = pid_text; 471 } 472 } else if (pid_pos >= 0) { 473 // contains %p only 474 first = pid_pos; 475 p1st = pid_text; 476 } else if (tms_pos >= 0) { 477 // contains %t only 478 first = tms_pos; 479 p1st = tms; 480 } 481 482 int buf_pos = (int)strlen(buf); 483 const char* tail = nametail; 484 485 if (first >= 0) { 486 tail = nametail + first + 2; 487 strncpy(&buf[buf_pos], nametail, first); 488 strcpy(&buf[buf_pos + first], p1st); 489 buf_pos = (int)strlen(buf); 490 if (second >= 0) { 491 strncpy(&buf[buf_pos], tail, second - first - 2); 492 strcpy(&buf[buf_pos + second - first - 2], p2nd); 493 tail = nametail + second + 2; 494 } 495 } 496 strcat(buf, tail); // append rest of name, or all of name 497 return buf; 498 } 499 500 // log_name comes from -XX:LogFile=log_name or 501 // -XX:DumpLoadedClassList=<file_name> 502 // in log_name, %p => pid1234 and 503 // %t => YYYY-MM-DD_HH-MM-SS 504 static const char* make_log_name(const char* log_name, const char* force_directory) { 505 char timestr[32]; 506 get_datetime_string(timestr, sizeof(timestr)); 507 return make_log_name_internal(log_name, force_directory, os::current_process_id(), 508 timestr); 509 } 510 511 fileStream::fileStream(const char* file_name) { 512 _file = fopen(file_name, "w"); 513 if (_file != NULL) { 514 _need_close = true; 515 } else { 516 warning("Cannot open file %s due to %s\n", file_name, os::strerror(errno)); 517 _need_close = false; 518 } 519 } 520 521 fileStream::fileStream(const char* file_name, const char* opentype) { 522 _file = fopen(file_name, opentype); 523 if (_file != NULL) { 524 _need_close = true; 525 } else { 526 warning("Cannot open file %s due to %s\n", file_name, os::strerror(errno)); 527 _need_close = false; 528 } 529 } 530 531 void fileStream::write(const char* s, size_t len) { 532 if (_file != NULL) { 533 // Make an unused local variable to avoid warning from gcc 4.x compiler. 534 size_t count = fwrite(s, 1, len, _file); 535 } 536 update_position(s, len); 537 } 538 539 long fileStream::fileSize() { 540 long size = -1; 541 if (_file != NULL) { 542 long pos = ::ftell(_file); 543 if (pos < 0) return pos; 544 if (::fseek(_file, 0, SEEK_END) == 0) { 545 size = ::ftell(_file); 546 } 547 ::fseek(_file, pos, SEEK_SET); 548 } 549 return size; 550 } 551 552 char* fileStream::readln(char *data, int count ) { 553 char * ret = ::fgets(data, count, _file); 554 //Get rid of annoying \n char 555 data[::strlen(data)-1] = '\0'; 556 return ret; 557 } 558 559 fileStream::~fileStream() { 560 if (_file != NULL) { 561 if (_need_close) fclose(_file); 562 _file = NULL; 563 } 564 } 565 566 void fileStream::flush() { 567 fflush(_file); 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 && !VMError::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 // Note: This feature is for maintainer use only. No need for L10N. 619 jio_printf("Warning: Cannot open log file: %s\n", log_name); 620 try_name = make_log_name(log_name, os::get_temp_directory()); 621 if (try_name == NULL) { 622 warning("Cannot open file %s: file name is too long for directory %s.\n", log_name, os::get_temp_directory()); 623 return NULL; 624 } 625 626 jio_printf("Warning: Forcing option -XX:LogFile=%s\n", try_name); 627 628 file = new(ResourceObj::C_HEAP, mtInternal) fileStream(try_name); 629 FREE_C_HEAP_ARRAY(char, try_name); 630 if (file->is_open()) { 631 return file; 632 } 633 634 delete file; 635 return NULL; 636 } 637 638 void defaultStream::init_log() { 639 // %%% Need a MutexLocker? 640 const char* log_name = LogFile != NULL ? LogFile : "hotspot_%p.log"; 641 fileStream* file = open_file(log_name); 642 643 if (file != NULL) { 644 _log_file = file; 645 _outer_xmlStream = new(ResourceObj::C_HEAP, mtInternal) xmlStream(file); 646 start_log(); 647 } else { 648 // and leave xtty as NULL 649 LogVMOutput = false; 650 DisplayVMOutput = true; 651 LogCompilation = false; 652 } 653 } 654 655 void defaultStream::start_log() { 656 xmlStream*xs = _outer_xmlStream; 657 if (this == tty) xtty = xs; 658 // Write XML header. 659 xs->print_cr("<?xml version='1.0' encoding='UTF-8'?>"); 660 // (For now, don't bother to issue a DTD for this private format.) 661 jlong time_ms = os::javaTimeMillis() - tty->time_stamp().milliseconds(); 662 // %%% Should be: jlong time_ms = os::start_time_milliseconds(), if 663 // we ever get round to introduce that method on the os class 664 xs->head("hotspot_log version='%d %d'" 665 " process='%d' time_ms='" INT64_FORMAT "'", 666 LOG_MAJOR_VERSION, LOG_MINOR_VERSION, 667 os::current_process_id(), (int64_t)time_ms); 668 // Write VM version header immediately. 669 xs->head("vm_version"); 670 xs->head("name"); xs->text("%s", VM_Version::vm_name()); xs->cr(); 671 xs->tail("name"); 672 xs->head("release"); xs->text("%s", VM_Version::vm_release()); xs->cr(); 673 xs->tail("release"); 674 xs->head("info"); xs->text("%s", VM_Version::internal_vm_info_string()); xs->cr(); 675 xs->tail("info"); 676 xs->tail("vm_version"); 677 // Record information about the command-line invocation. 678 xs->head("vm_arguments"); // Cf. Arguments::print_on() 679 if (Arguments::num_jvm_flags() > 0) { 680 xs->head("flags"); 681 Arguments::print_jvm_flags_on(xs->text()); 682 xs->tail("flags"); 683 } 684 if (Arguments::num_jvm_args() > 0) { 685 xs->head("args"); 686 Arguments::print_jvm_args_on(xs->text()); 687 xs->tail("args"); 688 } 689 if (Arguments::java_command() != NULL) { 690 xs->head("command"); xs->text()->print_cr("%s", Arguments::java_command()); 691 xs->tail("command"); 692 } 693 if (Arguments::sun_java_launcher() != NULL) { 694 xs->head("launcher"); xs->text()->print_cr("%s", Arguments::sun_java_launcher()); 695 xs->tail("launcher"); 696 } 697 if (Arguments::system_properties() != NULL) { 698 xs->head("properties"); 699 // Print it as a java-style property list. 700 // System properties don't generally contain newlines, so don't bother with unparsing. 701 outputStream *text = xs->text(); 702 for (SystemProperty* p = Arguments::system_properties(); p != NULL; p = p->next()) { 703 assert(p->key() != NULL, "p->key() is NULL"); 704 if (p->is_readable()) { 705 // Print in two stages to avoid problems with long 706 // keys/values. 707 text->print_raw(p->key()); 708 text->put('='); 709 assert(p->value() != NULL, "p->value() is NULL"); 710 text->print_raw_cr(p->value()); 711 } 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 VMError::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 void defaultStream::write(const char* s, size_t len) { 827 intx thread_id = os::current_thread_id(); 828 intx holder = hold(thread_id); 829 830 if (DisplayVMOutput && 831 (_outer_xmlStream == NULL || !_outer_xmlStream->inside_attrs())) { 832 // print to output stream. It can be redirected by a vfprintf hook 833 jio_print(s, len); 834 } 835 836 // print to log file 837 if (has_log_file()) { 838 int nl0 = _newlines; 839 xmlTextStream::write(s, len); 840 // flush the log file too, if there were any newlines 841 if (nl0 != _newlines){ 842 flush(); 843 } 844 } else { 845 update_position(s, len); 846 } 847 848 release(holder); 849 } 850 851 intx ttyLocker::hold_tty() { 852 if (defaultStream::instance == NULL) return defaultStream::NO_WRITER; 853 intx thread_id = os::current_thread_id(); 854 return defaultStream::instance->hold(thread_id); 855 } 856 857 void ttyLocker::release_tty(intx holder) { 858 if (holder == defaultStream::NO_WRITER) return; 859 defaultStream::instance->release(holder); 860 } 861 862 bool ttyLocker::release_tty_if_locked() { 863 intx thread_id = os::current_thread_id(); 864 if (defaultStream::instance->writer() == thread_id) { 865 // release the lock and return true so callers know if was 866 // previously held. 867 release_tty(thread_id); 868 return true; 869 } 870 return false; 871 } 872 873 void ttyLocker::break_tty_lock_for_safepoint(intx holder) { 874 if (defaultStream::instance != NULL && 875 defaultStream::instance->writer() == holder) { 876 if (xtty != NULL) { 877 xtty->print_cr("<!-- safepoint while printing -->"); 878 } 879 defaultStream::instance->release(holder); 880 } 881 // (else there was no lock to break) 882 } 883 884 void ostream_init() { 885 if (defaultStream::instance == NULL) { 886 defaultStream::instance = new(ResourceObj::C_HEAP, mtInternal) defaultStream(); 887 tty = defaultStream::instance; 888 889 // We want to ensure that time stamps in GC logs consider time 0 890 // the time when the JVM is initialized, not the first time we ask 891 // for a time stamp. So, here, we explicitly update the time stamp 892 // of tty. 893 tty->time_stamp().update_to(1); 894 } 895 } 896 897 void ostream_init_log() { 898 // Note : this must be called AFTER ostream_init() 899 900 #if INCLUDE_CDS 901 // For -XX:DumpLoadedClassList=<file> option 902 if (DumpLoadedClassList != NULL) { 903 const char* list_name = make_log_name(DumpLoadedClassList, NULL); 904 classlist_file = new(ResourceObj::C_HEAP, mtInternal) 905 fileStream(list_name); 906 FREE_C_HEAP_ARRAY(char, list_name); 907 } 908 #endif 909 910 // If we haven't lazily initialized the logfile yet, do it now, 911 // to avoid the possibility of lazy initialization during a VM 912 // crash, which can affect the stability of the fatal error handler. 913 defaultStream::instance->has_log_file(); 914 } 915 916 // ostream_exit() is called during normal VM exit to finish log files, flush 917 // output and free resource. 918 void ostream_exit() { 919 static bool ostream_exit_called = false; 920 if (ostream_exit_called) return; 921 ostream_exit_called = true; 922 #if INCLUDE_CDS 923 if (classlist_file != NULL) { 924 delete classlist_file; 925 } 926 #endif 927 if (tty != defaultStream::instance) { 928 delete tty; 929 } 930 if (defaultStream::instance != NULL) { 931 delete defaultStream::instance; 932 } 933 tty = NULL; 934 xtty = NULL; 935 defaultStream::instance = NULL; 936 } 937 938 // ostream_abort() is called by os::abort() when VM is about to die. 939 void ostream_abort() { 940 // Here we can't delete tty, just flush its output 941 if (tty) tty->flush(); 942 943 if (defaultStream::instance != NULL) { 944 static char buf[4096]; 945 defaultStream::instance->finish_log_on_error(buf, sizeof(buf)); 946 } 947 } 948 949 bufferedStream::bufferedStream(size_t initial_size, size_t bufmax) : outputStream() { 950 buffer_length = initial_size; 951 buffer = NEW_C_HEAP_ARRAY(char, buffer_length, mtInternal); 952 buffer_pos = 0; 953 buffer_fixed = false; 954 buffer_max = bufmax; 955 truncated = false; 956 } 957 958 bufferedStream::bufferedStream(char* fixed_buffer, size_t fixed_buffer_size, size_t bufmax) : outputStream() { 959 buffer_length = fixed_buffer_size; 960 buffer = fixed_buffer; 961 buffer_pos = 0; 962 buffer_fixed = true; 963 buffer_max = bufmax; 964 truncated = false; 965 } 966 967 void bufferedStream::write(const char* s, size_t len) { 968 969 if (truncated) { 970 return; 971 } 972 973 if(buffer_pos + len > buffer_max) { 974 flush(); // Note: may be a noop. 975 } 976 977 size_t end = buffer_pos + len; 978 if (end >= buffer_length) { 979 if (buffer_fixed) { 980 // if buffer cannot resize, silently truncate 981 len = buffer_length - buffer_pos - 1; 982 truncated = true; 983 } else { 984 // For small overruns, double the buffer. For larger ones, 985 // increase to the requested size. 986 if (end < buffer_length * 2) { 987 end = buffer_length * 2; 988 } 989 // Impose a cap beyond which the buffer cannot grow - a size which 990 // in all probability indicates a real error, e.g. faulty printing 991 // code looping, while not affecting cases of just-very-large-but-its-normal 992 // output. 993 const size_t reasonable_cap = MAX2(100 * M, buffer_max * 2); 994 if (end > reasonable_cap) { 995 // In debug VM, assert right away. 996 assert(false, "Exceeded max buffer size for this string."); 997 // Release VM: silently truncate. We do this since these kind of errors 998 // are both difficult to predict with testing (depending on logging content) 999 // and usually not serious enough to kill a production VM for it. 1000 end = reasonable_cap; 1001 size_t remaining = end - buffer_pos; 1002 if (len >= remaining) { 1003 len = remaining - 1; 1004 truncated = true; 1005 } 1006 } 1007 if (buffer_length < end) { 1008 buffer = REALLOC_C_HEAP_ARRAY(char, buffer, end, mtInternal); 1009 buffer_length = end; 1010 } 1011 } 1012 } 1013 if (len > 0) { 1014 memcpy(buffer + buffer_pos, s, len); 1015 buffer_pos += len; 1016 update_position(s, len); 1017 } 1018 } 1019 1020 char* bufferedStream::as_string() { 1021 char* copy = NEW_RESOURCE_ARRAY(char, buffer_pos+1); 1022 strncpy(copy, buffer, buffer_pos); 1023 copy[buffer_pos] = 0; // terminating null 1024 return copy; 1025 } 1026 1027 bufferedStream::~bufferedStream() { 1028 if (!buffer_fixed) { 1029 FREE_C_HEAP_ARRAY(char, buffer); 1030 } 1031 } 1032 1033 #ifndef PRODUCT 1034 1035 #if defined(SOLARIS) || defined(LINUX) || defined(AIX) || defined(_ALLBSD_SOURCE) 1036 #include <sys/types.h> 1037 #include <sys/socket.h> 1038 #include <netinet/in.h> 1039 #include <arpa/inet.h> 1040 #elif defined(_WINDOWS) 1041 #include <winsock2.h> 1042 #endif 1043 1044 // Network access 1045 networkStream::networkStream() : bufferedStream(1024*10, 1024*10) { 1046 1047 _socket = -1; 1048 1049 int result = os::socket(AF_INET, SOCK_STREAM, 0); 1050 if (result <= 0) { 1051 assert(false, "Socket could not be created!"); 1052 } else { 1053 _socket = result; 1054 } 1055 } 1056 1057 int networkStream::read(char *buf, size_t len) { 1058 return os::recv(_socket, buf, (int)len, 0); 1059 } 1060 1061 void networkStream::flush() { 1062 if (size() != 0) { 1063 int result = os::raw_send(_socket, (char *)base(), size(), 0); 1064 assert(result != -1, "connection error"); 1065 assert(result == (int)size(), "didn't send enough data"); 1066 } 1067 reset(); 1068 } 1069 1070 networkStream::~networkStream() { 1071 close(); 1072 } 1073 1074 void networkStream::close() { 1075 if (_socket != -1) { 1076 flush(); 1077 os::socket_close(_socket); 1078 _socket = -1; 1079 } 1080 } 1081 1082 bool networkStream::connect(const char *ip, short port) { 1083 1084 struct sockaddr_in server; 1085 server.sin_family = AF_INET; 1086 server.sin_port = htons(port); 1087 1088 server.sin_addr.s_addr = inet_addr(ip); 1089 if (server.sin_addr.s_addr == (uint32_t)-1) { 1090 struct hostent* host = os::get_host_by_name((char*)ip); 1091 if (host != NULL) { 1092 memcpy(&server.sin_addr, host->h_addr_list[0], host->h_length); 1093 } else { 1094 return false; 1095 } 1096 } 1097 1098 1099 int result = os::connect(_socket, (struct sockaddr*)&server, sizeof(struct sockaddr_in)); 1100 return (result >= 0); 1101 } 1102 1103 #endif