1 /* 2 * Copyright (c) 1997, 2018, 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_RESOURCE_ARRAY(char, buffer_length); 313 buffer_pos = 0; 314 buffer_fixed = false; 315 DEBUG_ONLY(rm = Thread::current()->current_resource_mark();) 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 } 325 326 void stringStream::write(const char* s, size_t len) { 327 size_t write_len = len; // number of non-null bytes to write 328 size_t end = buffer_pos + len + 1; // position after write and final '\0' 329 if (end > buffer_length) { 330 if (buffer_fixed) { 331 // if buffer cannot resize, silently truncate 332 end = buffer_length; 333 write_len = end - buffer_pos - 1; // leave room for the final '\0' 334 } else { 335 // For small overruns, double the buffer. For larger ones, 336 // increase to the requested size. 337 if (end < buffer_length * 2) { 338 end = buffer_length * 2; 339 } 340 char* oldbuf = buffer; 341 assert(rm == NULL || Thread::current()->current_resource_mark() == rm, 342 "StringStream is re-allocated with a different ResourceMark. Current: " 343 PTR_FORMAT " original: " PTR_FORMAT, 344 p2i(Thread::current()->current_resource_mark()), p2i(rm)); 345 buffer = NEW_RESOURCE_ARRAY(char, end); 346 if (buffer_pos > 0) { 347 memcpy(buffer, oldbuf, buffer_pos); 348 } 349 buffer_length = end; 350 } 351 } 352 // invariant: buffer is always null-terminated 353 guarantee(buffer_pos + write_len + 1 <= buffer_length, "stringStream oob"); 354 if (write_len > 0) { 355 buffer[buffer_pos + write_len] = 0; 356 memcpy(buffer + buffer_pos, s, write_len); 357 buffer_pos += write_len; 358 } 359 360 // Note that the following does not depend on write_len. 361 // This means that position and count get updated 362 // even when overflow occurs. 363 update_position(s, len); 364 } 365 366 char* stringStream::as_string() { 367 char* copy = NEW_RESOURCE_ARRAY(char, buffer_pos + 1); 368 strncpy(copy, buffer, buffer_pos); 369 copy[buffer_pos] = 0; // terminating null 370 return copy; 371 } 372 373 stringStream::~stringStream() {} 374 375 xmlStream* xtty; 376 outputStream* tty; 377 CDS_ONLY(fileStream* classlist_file;) // Only dump the classes that can be stored into the CDS archive 378 extern Mutex* tty_lock; 379 380 #define EXTRACHARLEN 32 381 #define CURRENTAPPX ".current" 382 // convert YYYY-MM-DD HH:MM:SS to YYYY-MM-DD_HH-MM-SS 383 char* get_datetime_string(char *buf, size_t len) { 384 os::local_time_string(buf, len); 385 int i = (int)strlen(buf); 386 while (--i >= 0) { 387 if (buf[i] == ' ') buf[i] = '_'; 388 else if (buf[i] == ':') buf[i] = '-'; 389 } 390 return buf; 391 } 392 393 static const char* make_log_name_internal(const char* log_name, const char* force_directory, 394 int pid, const char* tms) { 395 const char* basename = log_name; 396 char file_sep = os::file_separator()[0]; 397 const char* cp; 398 char pid_text[32]; 399 400 for (cp = log_name; *cp != '\0'; cp++) { 401 if (*cp == '/' || *cp == file_sep) { 402 basename = cp + 1; 403 } 404 } 405 const char* nametail = log_name; 406 // Compute buffer length 407 size_t buffer_length; 408 if (force_directory != NULL) { 409 buffer_length = strlen(force_directory) + strlen(os::file_separator()) + 410 strlen(basename) + 1; 411 } else { 412 buffer_length = strlen(log_name) + 1; 413 } 414 415 const char* pts = strstr(basename, "%p"); 416 int pid_pos = (pts == NULL) ? -1 : (pts - nametail); 417 418 if (pid_pos >= 0) { 419 jio_snprintf(pid_text, sizeof(pid_text), "pid%u", pid); 420 buffer_length += strlen(pid_text); 421 } 422 423 pts = strstr(basename, "%t"); 424 int tms_pos = (pts == NULL) ? -1 : (pts - nametail); 425 if (tms_pos >= 0) { 426 buffer_length += strlen(tms); 427 } 428 429 // File name is too long. 430 if (buffer_length > JVM_MAXPATHLEN) { 431 return NULL; 432 } 433 434 // Create big enough buffer. 435 char *buf = NEW_C_HEAP_ARRAY(char, buffer_length, mtInternal); 436 437 strcpy(buf, ""); 438 if (force_directory != NULL) { 439 strcat(buf, force_directory); 440 strcat(buf, os::file_separator()); 441 nametail = basename; // completely skip directory prefix 442 } 443 444 // who is first, %p or %t? 445 int first = -1, second = -1; 446 const char *p1st = NULL; 447 const char *p2nd = NULL; 448 449 if (pid_pos >= 0 && tms_pos >= 0) { 450 // contains both %p and %t 451 if (pid_pos < tms_pos) { 452 // case foo%pbar%tmonkey.log 453 first = pid_pos; 454 p1st = pid_text; 455 second = tms_pos; 456 p2nd = tms; 457 } else { 458 // case foo%tbar%pmonkey.log 459 first = tms_pos; 460 p1st = tms; 461 second = pid_pos; 462 p2nd = pid_text; 463 } 464 } else if (pid_pos >= 0) { 465 // contains %p only 466 first = pid_pos; 467 p1st = pid_text; 468 } else if (tms_pos >= 0) { 469 // contains %t only 470 first = tms_pos; 471 p1st = tms; 472 } 473 474 int buf_pos = (int)strlen(buf); 475 const char* tail = nametail; 476 477 if (first >= 0) { 478 tail = nametail + first + 2; 479 strncpy(&buf[buf_pos], nametail, first); 480 strcpy(&buf[buf_pos + first], p1st); 481 buf_pos = (int)strlen(buf); 482 if (second >= 0) { 483 strncpy(&buf[buf_pos], tail, second - first - 2); 484 strcpy(&buf[buf_pos + second - first - 2], p2nd); 485 tail = nametail + second + 2; 486 } 487 } 488 strcat(buf, tail); // append rest of name, or all of name 489 return buf; 490 } 491 492 // log_name comes from -XX:LogFile=log_name or 493 // -XX:DumpLoadedClassList=<file_name> 494 // in log_name, %p => pid1234 and 495 // %t => YYYY-MM-DD_HH-MM-SS 496 static const char* make_log_name(const char* log_name, const char* force_directory) { 497 char timestr[32]; 498 get_datetime_string(timestr, sizeof(timestr)); 499 return make_log_name_internal(log_name, force_directory, os::current_process_id(), 500 timestr); 501 } 502 503 fileStream::fileStream(const char* file_name) { 504 _file = fopen(file_name, "w"); 505 if (_file != NULL) { 506 _need_close = true; 507 } else { 508 warning("Cannot open file %s due to %s\n", file_name, os::strerror(errno)); 509 _need_close = false; 510 } 511 } 512 513 fileStream::fileStream(const char* file_name, const char* opentype) { 514 _file = fopen(file_name, opentype); 515 if (_file != NULL) { 516 _need_close = true; 517 } else { 518 warning("Cannot open file %s due to %s\n", file_name, os::strerror(errno)); 519 _need_close = false; 520 } 521 } 522 523 void fileStream::write(const char* s, size_t len) { 524 if (_file != NULL) { 525 // Make an unused local variable to avoid warning from gcc 4.x compiler. 526 size_t count = fwrite(s, 1, len, _file); 527 } 528 update_position(s, len); 529 } 530 531 long fileStream::fileSize() { 532 long size = -1; 533 if (_file != NULL) { 534 long pos = ::ftell(_file); 535 if (pos < 0) return pos; 536 if (::fseek(_file, 0, SEEK_END) == 0) { 537 size = ::ftell(_file); 538 } 539 ::fseek(_file, pos, SEEK_SET); 540 } 541 return size; 542 } 543 544 char* fileStream::readln(char *data, int count ) { 545 char * ret = ::fgets(data, count, _file); 546 //Get rid of annoying \n char 547 data[::strlen(data)-1] = '\0'; 548 return ret; 549 } 550 551 fileStream::~fileStream() { 552 if (_file != NULL) { 553 if (_need_close) fclose(_file); 554 _file = NULL; 555 } 556 } 557 558 void fileStream::flush() { 559 fflush(_file); 560 } 561 562 fdStream::fdStream(const char* file_name) { 563 _fd = open(file_name, O_WRONLY | O_CREAT | O_TRUNC, 0666); 564 _need_close = true; 565 } 566 567 fdStream::~fdStream() { 568 if (_fd != -1) { 569 if (_need_close) close(_fd); 570 _fd = -1; 571 } 572 } 573 574 void fdStream::write(const char* s, size_t len) { 575 if (_fd != -1) { 576 // Make an unused local variable to avoid warning from gcc 4.x compiler. 577 size_t count = ::write(_fd, s, (int)len); 578 } 579 update_position(s, len); 580 } 581 582 defaultStream* defaultStream::instance = NULL; 583 int defaultStream::_output_fd = 1; 584 int defaultStream::_error_fd = 2; 585 FILE* defaultStream::_output_stream = stdout; 586 FILE* defaultStream::_error_stream = stderr; 587 588 #define LOG_MAJOR_VERSION 160 589 #define LOG_MINOR_VERSION 1 590 591 void defaultStream::init() { 592 _inited = true; 593 if (LogVMOutput || LogCompilation) { 594 init_log(); 595 } 596 } 597 598 bool defaultStream::has_log_file() { 599 // lazily create log file (at startup, LogVMOutput is false even 600 // if +LogVMOutput is used, because the flags haven't been parsed yet) 601 // For safer printing during fatal error handling, do not init logfile 602 // if a VM error has been reported. 603 if (!_inited && !VMError::is_error_reported()) init(); 604 return _log_file != NULL; 605 } 606 607 fileStream* defaultStream::open_file(const char* log_name) { 608 const char* try_name = make_log_name(log_name, NULL); 609 if (try_name == NULL) { 610 warning("Cannot open file %s: file name is too long.\n", log_name); 611 return NULL; 612 } 613 614 fileStream* file = new(ResourceObj::C_HEAP, mtInternal) fileStream(try_name); 615 FREE_C_HEAP_ARRAY(char, try_name); 616 if (file->is_open()) { 617 return file; 618 } 619 620 // Try again to open the file in the temp directory. 621 delete file; 622 // Note: This feature is for maintainer use only. No need for L10N. 623 jio_printf("Warning: Cannot open log file: %s\n", log_name); 624 try_name = make_log_name(log_name, os::get_temp_directory()); 625 if (try_name == NULL) { 626 warning("Cannot open file %s: file name is too long for directory %s.\n", log_name, os::get_temp_directory()); 627 return NULL; 628 } 629 630 jio_printf("Warning: Forcing option -XX:LogFile=%s\n", try_name); 631 632 file = new(ResourceObj::C_HEAP, mtInternal) fileStream(try_name); 633 FREE_C_HEAP_ARRAY(char, try_name); 634 if (file->is_open()) { 635 return file; 636 } 637 638 delete file; 639 return NULL; 640 } 641 642 void defaultStream::init_log() { 643 // %%% Need a MutexLocker? 644 const char* log_name = LogFile != NULL ? LogFile : "hotspot_%p.log"; 645 fileStream* file = open_file(log_name); 646 647 if (file != NULL) { 648 _log_file = file; 649 _outer_xmlStream = new(ResourceObj::C_HEAP, mtInternal) xmlStream(file); 650 start_log(); 651 } else { 652 // and leave xtty as NULL 653 LogVMOutput = false; 654 DisplayVMOutput = true; 655 LogCompilation = false; 656 } 657 } 658 659 void defaultStream::start_log() { 660 xmlStream*xs = _outer_xmlStream; 661 if (this == tty) xtty = xs; 662 // Write XML header. 663 xs->print_cr("<?xml version='1.0' encoding='UTF-8'?>"); 664 // (For now, don't bother to issue a DTD for this private format.) 665 jlong time_ms = os::javaTimeMillis() - tty->time_stamp().milliseconds(); 666 // %%% Should be: jlong time_ms = os::start_time_milliseconds(), if 667 // we ever get round to introduce that method on the os class 668 xs->head("hotspot_log version='%d %d'" 669 " process='%d' time_ms='" INT64_FORMAT "'", 670 LOG_MAJOR_VERSION, LOG_MINOR_VERSION, 671 os::current_process_id(), (int64_t)time_ms); 672 // Write VM version header immediately. 673 xs->head("vm_version"); 674 xs->head("name"); xs->text("%s", VM_Version::vm_name()); xs->cr(); 675 xs->tail("name"); 676 xs->head("release"); xs->text("%s", VM_Version::vm_release()); xs->cr(); 677 xs->tail("release"); 678 xs->head("info"); xs->text("%s", VM_Version::internal_vm_info_string()); xs->cr(); 679 xs->tail("info"); 680 xs->tail("vm_version"); 681 // Record information about the command-line invocation. 682 xs->head("vm_arguments"); // Cf. Arguments::print_on() 683 if (Arguments::num_jvm_flags() > 0) { 684 xs->head("flags"); 685 Arguments::print_jvm_flags_on(xs->text()); 686 xs->tail("flags"); 687 } 688 if (Arguments::num_jvm_args() > 0) { 689 xs->head("args"); 690 Arguments::print_jvm_args_on(xs->text()); 691 xs->tail("args"); 692 } 693 if (Arguments::java_command() != NULL) { 694 xs->head("command"); xs->text()->print_cr("%s", Arguments::java_command()); 695 xs->tail("command"); 696 } 697 if (Arguments::sun_java_launcher() != NULL) { 698 xs->head("launcher"); xs->text()->print_cr("%s", Arguments::sun_java_launcher()); 699 xs->tail("launcher"); 700 } 701 if (Arguments::system_properties() != NULL) { 702 xs->head("properties"); 703 // Print it as a java-style property list. 704 // System properties don't generally contain newlines, so don't bother with unparsing. 705 outputStream *text = xs->text(); 706 for (SystemProperty* p = Arguments::system_properties(); p != NULL; p = p->next()) { 707 assert(p->key() != NULL, "p->key() is NULL"); 708 if (p->is_readable()) { 709 // Print in two stages to avoid problems with long 710 // keys/values. 711 text->print_raw(p->key()); 712 text->put('='); 713 assert(p->value() != NULL, "p->value() is NULL"); 714 text->print_raw_cr(p->value()); 715 } 716 } 717 xs->tail("properties"); 718 } 719 xs->tail("vm_arguments"); 720 // tty output per se is grouped under the <tty>...</tty> element. 721 xs->head("tty"); 722 // All further non-markup text gets copied to the tty: 723 xs->_text = this; // requires friend declaration! 724 } 725 726 // finish_log() is called during normal VM shutdown. finish_log_on_error() is 727 // called by ostream_abort() after a fatal error. 728 // 729 void defaultStream::finish_log() { 730 xmlStream* xs = _outer_xmlStream; 731 xs->done("tty"); 732 733 // Other log forks are appended here, at the End of Time: 734 CompileLog::finish_log(xs->out()); // write compile logging, if any, now 735 736 xs->done("hotspot_log"); 737 xs->flush(); 738 739 fileStream* file = _log_file; 740 _log_file = NULL; 741 742 delete _outer_xmlStream; 743 _outer_xmlStream = NULL; 744 745 file->flush(); 746 delete file; 747 } 748 749 void defaultStream::finish_log_on_error(char *buf, int buflen) { 750 xmlStream* xs = _outer_xmlStream; 751 752 if (xs && xs->out()) { 753 754 xs->done_raw("tty"); 755 756 // Other log forks are appended here, at the End of Time: 757 CompileLog::finish_log_on_error(xs->out(), buf, buflen); // write compile logging, if any, now 758 759 xs->done_raw("hotspot_log"); 760 xs->flush(); 761 762 fileStream* file = _log_file; 763 _log_file = NULL; 764 _outer_xmlStream = NULL; 765 766 if (file) { 767 file->flush(); 768 769 // Can't delete or close the file because delete and fclose aren't 770 // async-safe. We are about to die, so leave it to the kernel. 771 // delete file; 772 } 773 } 774 } 775 776 intx defaultStream::hold(intx writer_id) { 777 bool has_log = has_log_file(); // check before locking 778 if (// impossible, but who knows? 779 writer_id == NO_WRITER || 780 781 // bootstrap problem 782 tty_lock == NULL || 783 784 // can't grab a lock if current Thread isn't set 785 Thread::current_or_null() == NULL || 786 787 // developer hook 788 !SerializeVMOutput || 789 790 // VM already unhealthy 791 VMError::is_error_reported() || 792 793 // safepoint == global lock (for VM only) 794 (SafepointSynchronize::is_synchronizing() && 795 Thread::current()->is_VM_thread()) 796 ) { 797 // do not attempt to lock unless we know the thread and the VM is healthy 798 return NO_WRITER; 799 } 800 if (_writer == writer_id) { 801 // already held, no need to re-grab the lock 802 return NO_WRITER; 803 } 804 tty_lock->lock_without_safepoint_check(); 805 // got the lock 806 if (writer_id != _last_writer) { 807 if (has_log) { 808 _log_file->bol(); 809 // output a hint where this output is coming from: 810 _log_file->print_cr("<writer thread='" UINTX_FORMAT "'/>", writer_id); 811 } 812 _last_writer = writer_id; 813 } 814 _writer = writer_id; 815 return writer_id; 816 } 817 818 void defaultStream::release(intx holder) { 819 if (holder == NO_WRITER) { 820 // nothing to release: either a recursive lock, or we scribbled (too bad) 821 return; 822 } 823 if (_writer != holder) { 824 return; // already unlocked, perhaps via break_tty_lock_for_safepoint 825 } 826 _writer = NO_WRITER; 827 tty_lock->unlock(); 828 } 829 830 void defaultStream::write(const char* s, size_t len) { 831 intx thread_id = os::current_thread_id(); 832 intx holder = hold(thread_id); 833 834 if (DisplayVMOutput && 835 (_outer_xmlStream == NULL || !_outer_xmlStream->inside_attrs())) { 836 // print to output stream. It can be redirected by a vfprintf hook 837 jio_print(s, len); 838 } 839 840 // print to log file 841 if (has_log_file()) { 842 int nl0 = _newlines; 843 xmlTextStream::write(s, len); 844 // flush the log file too, if there were any newlines 845 if (nl0 != _newlines){ 846 flush(); 847 } 848 } else { 849 update_position(s, len); 850 } 851 852 release(holder); 853 } 854 855 intx ttyLocker::hold_tty() { 856 if (defaultStream::instance == NULL) return defaultStream::NO_WRITER; 857 intx thread_id = os::current_thread_id(); 858 return defaultStream::instance->hold(thread_id); 859 } 860 861 void ttyLocker::release_tty(intx holder) { 862 if (holder == defaultStream::NO_WRITER) return; 863 defaultStream::instance->release(holder); 864 } 865 866 bool ttyLocker::release_tty_if_locked() { 867 intx thread_id = os::current_thread_id(); 868 if (defaultStream::instance->writer() == thread_id) { 869 // release the lock and return true so callers know if was 870 // previously held. 871 release_tty(thread_id); 872 return true; 873 } 874 return false; 875 } 876 877 void ttyLocker::break_tty_lock_for_safepoint(intx holder) { 878 if (defaultStream::instance != NULL && 879 defaultStream::instance->writer() == holder) { 880 if (xtty != NULL) { 881 xtty->print_cr("<!-- safepoint while printing -->"); 882 } 883 defaultStream::instance->release(holder); 884 } 885 // (else there was no lock to break) 886 } 887 888 void ostream_init() { 889 if (defaultStream::instance == NULL) { 890 defaultStream::instance = new(ResourceObj::C_HEAP, mtInternal) defaultStream(); 891 tty = defaultStream::instance; 892 893 // We want to ensure that time stamps in GC logs consider time 0 894 // the time when the JVM is initialized, not the first time we ask 895 // for a time stamp. So, here, we explicitly update the time stamp 896 // of tty. 897 tty->time_stamp().update_to(1); 898 } 899 } 900 901 void ostream_init_log() { 902 // Note : this must be called AFTER ostream_init() 903 904 #if INCLUDE_CDS 905 // For -XX:DumpLoadedClassList=<file> option 906 if (DumpLoadedClassList != NULL) { 907 const char* list_name = make_log_name(DumpLoadedClassList, NULL); 908 classlist_file = new(ResourceObj::C_HEAP, mtInternal) 909 fileStream(list_name); 910 FREE_C_HEAP_ARRAY(char, list_name); 911 } 912 #endif 913 914 // If we haven't lazily initialized the logfile yet, do it now, 915 // to avoid the possibility of lazy initialization during a VM 916 // crash, which can affect the stability of the fatal error handler. 917 defaultStream::instance->has_log_file(); 918 } 919 920 // ostream_exit() is called during normal VM exit to finish log files, flush 921 // output and free resource. 922 void ostream_exit() { 923 static bool ostream_exit_called = false; 924 if (ostream_exit_called) return; 925 ostream_exit_called = true; 926 #if INCLUDE_CDS 927 if (classlist_file != NULL) { 928 delete classlist_file; 929 } 930 #endif 931 if (tty != defaultStream::instance) { 932 delete tty; 933 } 934 if (defaultStream::instance != NULL) { 935 delete defaultStream::instance; 936 } 937 tty = NULL; 938 xtty = NULL; 939 defaultStream::instance = NULL; 940 } 941 942 // ostream_abort() is called by os::abort() when VM is about to die. 943 void ostream_abort() { 944 // Here we can't delete tty, just flush its output 945 if (tty) tty->flush(); 946 947 if (defaultStream::instance != NULL) { 948 static char buf[4096]; 949 defaultStream::instance->finish_log_on_error(buf, sizeof(buf)); 950 } 951 } 952 953 bufferedStream::bufferedStream(size_t initial_size, size_t bufmax) : outputStream() { 954 buffer_length = initial_size; 955 buffer = NEW_C_HEAP_ARRAY(char, buffer_length, mtInternal); 956 buffer_pos = 0; 957 buffer_fixed = false; 958 buffer_max = bufmax; 959 } 960 961 bufferedStream::bufferedStream(char* fixed_buffer, size_t fixed_buffer_size, size_t bufmax) : outputStream() { 962 buffer_length = fixed_buffer_size; 963 buffer = fixed_buffer; 964 buffer_pos = 0; 965 buffer_fixed = true; 966 buffer_max = bufmax; 967 } 968 969 void bufferedStream::write(const char* s, size_t len) { 970 971 if(buffer_pos + len > buffer_max) { 972 flush(); 973 } 974 975 size_t end = buffer_pos + len; 976 if (end >= buffer_length) { 977 if (buffer_fixed) { 978 // if buffer cannot resize, silently truncate 979 len = buffer_length - buffer_pos - 1; 980 } else { 981 // For small overruns, double the buffer. For larger ones, 982 // increase to the requested size. 983 if (end < buffer_length * 2) { 984 end = buffer_length * 2; 985 } 986 buffer = REALLOC_C_HEAP_ARRAY(char, buffer, end, mtInternal); 987 buffer_length = end; 988 } 989 } 990 memcpy(buffer + buffer_pos, s, len); 991 buffer_pos += len; 992 update_position(s, len); 993 } 994 995 char* bufferedStream::as_string() { 996 char* copy = NEW_RESOURCE_ARRAY(char, buffer_pos+1); 997 strncpy(copy, buffer, buffer_pos); 998 copy[buffer_pos] = 0; // terminating null 999 return copy; 1000 } 1001 1002 bufferedStream::~bufferedStream() { 1003 if (!buffer_fixed) { 1004 FREE_C_HEAP_ARRAY(char, buffer); 1005 } 1006 } 1007 1008 #ifndef PRODUCT 1009 1010 #if defined(SOLARIS) || defined(LINUX) || defined(AIX) || defined(_ALLBSD_SOURCE) 1011 #include <sys/types.h> 1012 #include <sys/socket.h> 1013 #include <netinet/in.h> 1014 #include <arpa/inet.h> 1015 #elif defined(_WINDOWS) 1016 #include <winsock2.h> 1017 #endif 1018 1019 // Network access 1020 networkStream::networkStream() : bufferedStream(1024*10, 1024*10) { 1021 1022 _socket = -1; 1023 1024 int result = os::socket(AF_INET, SOCK_STREAM, 0); 1025 if (result <= 0) { 1026 assert(false, "Socket could not be created!"); 1027 } else { 1028 _socket = result; 1029 } 1030 } 1031 1032 int networkStream::read(char *buf, size_t len) { 1033 return os::recv(_socket, buf, (int)len, 0); 1034 } 1035 1036 void networkStream::flush() { 1037 if (size() != 0) { 1038 int result = os::raw_send(_socket, (char *)base(), size(), 0); 1039 assert(result != -1, "connection error"); 1040 assert(result == (int)size(), "didn't send enough data"); 1041 } 1042 reset(); 1043 } 1044 1045 networkStream::~networkStream() { 1046 close(); 1047 } 1048 1049 void networkStream::close() { 1050 if (_socket != -1) { 1051 flush(); 1052 os::socket_close(_socket); 1053 _socket = -1; 1054 } 1055 } 1056 1057 bool networkStream::connect(const char *ip, short port) { 1058 1059 struct sockaddr_in server; 1060 server.sin_family = AF_INET; 1061 server.sin_port = htons(port); 1062 1063 server.sin_addr.s_addr = inet_addr(ip); 1064 if (server.sin_addr.s_addr == (uint32_t)-1) { 1065 struct hostent* host = os::get_host_by_name((char*)ip); 1066 if (host != NULL) { 1067 memcpy(&server.sin_addr, host->h_addr_list[0], host->h_length); 1068 } else { 1069 return false; 1070 } 1071 } 1072 1073 1074 int result = os::connect(_socket, (struct sockaddr*)&server, sizeof(struct sockaddr_in)); 1075 return (result >= 0); 1076 } 1077 1078 #endif