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 extern "C" void jio_print(const char* s); // Declarationtion of jvm method 40 41 outputStream::outputStream(int width) { 42 _width = width; 43 _position = 0; 44 _newlines = 0; 45 _precount = 0; 46 _indentation = 0; 47 _scratch = NULL; 48 _scratch_len = 0; 49 } 50 51 outputStream::outputStream(int width, bool has_time_stamps) { 52 _width = width; 53 _position = 0; 54 _newlines = 0; 55 _precount = 0; 56 _indentation = 0; 57 _scratch = NULL; 58 _scratch_len = 0; 59 if (has_time_stamps) _stamp.update(); 60 } 61 62 void outputStream::update_position(const char* s, size_t len) { 63 for (size_t i = 0; i < len; i++) { 64 char ch = s[i]; 65 if (ch == '\n') { 66 _newlines += 1; 67 _precount += _position + 1; 68 _position = 0; 69 } else if (ch == '\t') { 70 int tw = 8 - (_position & 7); 71 _position += tw; 72 _precount -= tw-1; // invariant: _precount + _position == total count 73 } else { 74 _position += 1; 75 } 76 } 77 } 78 79 // Execute a vsprintf, using the given buffer if necessary. 80 // Return a pointer to the formatted string. 81 const char* outputStream::do_vsnprintf(char* buffer, size_t buflen, 82 const char* format, va_list ap, 83 bool add_cr, 84 size_t& result_len) { 85 assert(buflen >= 2, "buffer too small"); 86 87 const char* result; 88 if (add_cr) buflen--; 89 if (!strchr(format, '%')) { 90 // constant format string 91 result = format; 92 result_len = strlen(result); 93 if (add_cr && result_len >= buflen) result_len = buflen-1; // truncate 94 } else if (format[0] == '%' && format[1] == 's' && format[2] == '\0') { 95 // trivial copy-through format string 96 result = va_arg(ap, const char*); 97 result_len = strlen(result); 98 if (add_cr && result_len >= buflen) result_len = buflen-1; // truncate 99 } else { 100 int written = os::vsnprintf(buffer, buflen, format, ap); 101 assert(written >= 0, "vsnprintf encoding error"); 102 result = buffer; 103 if ((size_t)written < buflen) { 104 result_len = written; 105 } else { 106 DEBUG_ONLY(warning("increase O_BUFLEN in ostream.hpp -- output truncated");) 107 result_len = buflen - 1; 108 } 109 } 110 if (add_cr) { 111 if (result != buffer) { 112 memcpy(buffer, result, result_len); 113 result = buffer; 114 } 115 buffer[result_len++] = '\n'; 116 buffer[result_len] = 0; 117 } 118 return result; 119 } 120 121 void outputStream::do_vsnprintf_and_write_with_automatic_buffer(const char* format, va_list ap, bool add_cr) { 122 char buffer[O_BUFLEN]; 123 size_t len; 124 const char* str = do_vsnprintf(buffer, sizeof(buffer), format, ap, add_cr, len); 125 write(str, len); 126 } 127 128 void outputStream::do_vsnprintf_and_write_with_scratch_buffer(const char* format, va_list ap, bool add_cr) { 129 size_t len; 130 const char* str = do_vsnprintf(_scratch, _scratch_len, format, ap, add_cr, len); 131 write(str, len); 132 } 133 134 void outputStream::do_vsnprintf_and_write(const char* format, va_list ap, bool add_cr) { 135 if (_scratch) { 136 do_vsnprintf_and_write_with_scratch_buffer(format, ap, add_cr); 137 } else { 138 do_vsnprintf_and_write_with_automatic_buffer(format, ap, add_cr); 139 } 140 } 141 142 void outputStream::print(const char* format, ...) { 143 va_list ap; 144 va_start(ap, format); 145 do_vsnprintf_and_write(format, ap, false); 146 va_end(ap); 147 } 148 149 void outputStream::print_cr(const char* format, ...) { 150 va_list ap; 151 va_start(ap, format); 152 do_vsnprintf_and_write(format, ap, true); 153 va_end(ap); 154 } 155 156 void outputStream::vprint(const char *format, va_list argptr) { 157 do_vsnprintf_and_write(format, argptr, false); 158 } 159 160 void outputStream::vprint_cr(const char* format, va_list argptr) { 161 do_vsnprintf_and_write(format, argptr, true); 162 } 163 164 void outputStream::fill_to(int col) { 165 int need_fill = col - position(); 166 sp(need_fill); 167 } 168 169 void outputStream::move_to(int col, int slop, int min_space) { 170 if (position() >= col + slop) 171 cr(); 172 int need_fill = col - position(); 173 if (need_fill < min_space) 174 need_fill = min_space; 175 sp(need_fill); 176 } 177 178 void outputStream::put(char ch) { 179 assert(ch != 0, "please fix call site"); 180 char buf[] = { ch, '\0' }; 181 write(buf, 1); 182 } 183 184 #define SP_USE_TABS false 185 186 void outputStream::sp(int count) { 187 if (count < 0) return; 188 if (SP_USE_TABS && count >= 8) { 189 int target = position() + count; 190 while (count >= 8) { 191 this->write("\t", 1); 192 count -= 8; 193 } 194 count = target - position(); 195 } 196 while (count > 0) { 197 int nw = (count > 8) ? 8 : count; 198 this->write(" ", nw); 199 count -= nw; 200 } 201 } 202 203 void outputStream::cr() { 204 this->write("\n", 1); 205 } 206 207 void outputStream::stamp() { 208 if (! _stamp.is_updated()) { 209 _stamp.update(); // start at 0 on first call to stamp() 210 } 211 212 // outputStream::stamp() may get called by ostream_abort(), use snprintf 213 // to avoid allocating large stack buffer in print(). 214 char buf[40]; 215 jio_snprintf(buf, sizeof(buf), "%.3f", _stamp.seconds()); 216 print_raw(buf); 217 } 218 219 void outputStream::stamp(bool guard, 220 const char* prefix, 221 const char* suffix) { 222 if (!guard) { 223 return; 224 } 225 print_raw(prefix); 226 stamp(); 227 print_raw(suffix); 228 } 229 230 void outputStream::date_stamp(bool guard, 231 const char* prefix, 232 const char* suffix) { 233 if (!guard) { 234 return; 235 } 236 print_raw(prefix); 237 static const char error_time[] = "yyyy-mm-ddThh:mm:ss.mmm+zzzz"; 238 static const int buffer_length = 32; 239 char buffer[buffer_length]; 240 const char* iso8601_result = os::iso8601_time(buffer, buffer_length); 241 if (iso8601_result != NULL) { 242 print_raw(buffer); 243 } else { 244 print_raw(error_time); 245 } 246 print_raw(suffix); 247 return; 248 } 249 250 outputStream& outputStream::indent() { 251 while (_position < _indentation) sp(); 252 return *this; 253 } 254 255 void outputStream::print_jlong(jlong value) { 256 print(JLONG_FORMAT, value); 257 } 258 259 void outputStream::print_julong(julong value) { 260 print(JULONG_FORMAT, value); 261 } 262 263 /** 264 * This prints out hex data in a 'windbg' or 'xxd' form, where each line is: 265 * <hex-address>: 8 * <hex-halfword> <ascii translation (optional)> 266 * example: 267 * 0000000: 7f44 4f46 0102 0102 0000 0000 0000 0000 .DOF............ 268 * 0000010: 0000 0000 0000 0040 0000 0020 0000 0005 .......@... .... 269 * 0000020: 0000 0000 0000 0040 0000 0000 0000 015d .......@.......] 270 * ... 271 * 272 * indent is applied to each line. Ends with a CR. 273 */ 274 void outputStream::print_data(void* data, size_t len, bool with_ascii) { 275 size_t limit = (len + 16) / 16 * 16; 276 for (size_t i = 0; i < limit; ++i) { 277 if (i % 16 == 0) { 278 indent().print(INTPTR_FORMAT_W(07) ":", i); 279 } 280 if (i % 2 == 0) { 281 print(" "); 282 } 283 if (i < len) { 284 print("%02x", ((unsigned char*)data)[i]); 285 } else { 286 print(" "); 287 } 288 if ((i + 1) % 16 == 0) { 289 if (with_ascii) { 290 print(" "); 291 for (size_t j = 0; j < 16; ++j) { 292 size_t idx = i + j - 15; 293 if (idx < len) { 294 char c = ((char*)data)[idx]; 295 print("%c", c >= 32 && c <= 126 ? c : '.'); 296 } 297 } 298 } 299 cr(); 300 } 301 } 302 } 303 304 stringStream::stringStream(size_t initial_size) : outputStream() { 305 buffer_length = initial_size; 306 buffer = NEW_RESOURCE_ARRAY(char, buffer_length); 307 buffer_pos = 0; 308 buffer_fixed = false; 309 DEBUG_ONLY(rm = Thread::current()->current_resource_mark();) 310 } 311 312 // useful for output to fixed chunks of memory, such as performance counters 313 stringStream::stringStream(char* fixed_buffer, size_t fixed_buffer_size) : outputStream() { 314 buffer_length = fixed_buffer_size; 315 buffer = fixed_buffer; 316 buffer_pos = 0; 317 buffer_fixed = true; 318 } 319 320 void stringStream::write(const char* s, size_t len) { 321 size_t write_len = len; // number of non-null bytes to write 322 size_t end = buffer_pos + len + 1; // position after write and final '\0' 323 if (end > buffer_length) { 324 if (buffer_fixed) { 325 // if buffer cannot resize, silently truncate 326 end = buffer_length; 327 write_len = end - buffer_pos - 1; // leave room for the final '\0' 328 } else { 329 // For small overruns, double the buffer. For larger ones, 330 // increase to the requested size. 331 if (end < buffer_length * 2) { 332 end = buffer_length * 2; 333 } 334 char* oldbuf = buffer; 335 assert(rm == NULL || Thread::current()->current_resource_mark() == rm, 336 "StringStream is re-allocated with a different ResourceMark. Current: " 337 PTR_FORMAT " original: " PTR_FORMAT, 338 p2i(Thread::current()->current_resource_mark()), p2i(rm)); 339 buffer = NEW_RESOURCE_ARRAY(char, end); 340 if (buffer_pos > 0) { 341 memcpy(buffer, oldbuf, buffer_pos); 342 } 343 buffer_length = end; 344 } 345 } 346 // invariant: buffer is always null-terminated 347 guarantee(buffer_pos + write_len + 1 <= buffer_length, "stringStream oob"); 348 if (write_len > 0) { 349 buffer[buffer_pos + write_len] = 0; 350 memcpy(buffer + buffer_pos, s, write_len); 351 buffer_pos += write_len; 352 } 353 354 // Note that the following does not depend on write_len. 355 // This means that position and count get updated 356 // even when overflow occurs. 357 update_position(s, len); 358 } 359 360 char* stringStream::as_string() { 361 char* copy = NEW_RESOURCE_ARRAY(char, buffer_pos + 1); 362 strncpy(copy, buffer, buffer_pos); 363 copy[buffer_pos] = 0; // terminating null 364 return copy; 365 } 366 367 stringStream::~stringStream() {} 368 369 xmlStream* xtty; 370 outputStream* tty; 371 CDS_ONLY(fileStream* classlist_file;) // Only dump the classes that can be stored into the CDS archive 372 extern Mutex* tty_lock; 373 374 #define EXTRACHARLEN 32 375 #define CURRENTAPPX ".current" 376 // convert YYYY-MM-DD HH:MM:SS to YYYY-MM-DD_HH-MM-SS 377 char* get_datetime_string(char *buf, size_t len) { 378 os::local_time_string(buf, len); 379 int i = (int)strlen(buf); 380 while (--i >= 0) { 381 if (buf[i] == ' ') buf[i] = '_'; 382 else if (buf[i] == ':') buf[i] = '-'; 383 } 384 return buf; 385 } 386 387 static const char* make_log_name_internal(const char* log_name, const char* force_directory, 388 int pid, const char* tms) { 389 const char* basename = log_name; 390 char file_sep = os::file_separator()[0]; 391 const char* cp; 392 char pid_text[32]; 393 394 for (cp = log_name; *cp != '\0'; cp++) { 395 if (*cp == '/' || *cp == file_sep) { 396 basename = cp + 1; 397 } 398 } 399 const char* nametail = log_name; 400 // Compute buffer length 401 size_t buffer_length; 402 if (force_directory != NULL) { 403 buffer_length = strlen(force_directory) + strlen(os::file_separator()) + 404 strlen(basename) + 1; 405 } else { 406 buffer_length = strlen(log_name) + 1; 407 } 408 409 const char* pts = strstr(basename, "%p"); 410 int pid_pos = (pts == NULL) ? -1 : (pts - nametail); 411 412 if (pid_pos >= 0) { 413 jio_snprintf(pid_text, sizeof(pid_text), "pid%u", pid); 414 buffer_length += strlen(pid_text); 415 } 416 417 pts = strstr(basename, "%t"); 418 int tms_pos = (pts == NULL) ? -1 : (pts - nametail); 419 if (tms_pos >= 0) { 420 buffer_length += strlen(tms); 421 } 422 423 // File name is too long. 424 if (buffer_length > JVM_MAXPATHLEN) { 425 return NULL; 426 } 427 428 // Create big enough buffer. 429 char *buf = NEW_C_HEAP_ARRAY(char, buffer_length, mtInternal); 430 431 strcpy(buf, ""); 432 if (force_directory != NULL) { 433 strcat(buf, force_directory); 434 strcat(buf, os::file_separator()); 435 nametail = basename; // completely skip directory prefix 436 } 437 438 // who is first, %p or %t? 439 int first = -1, second = -1; 440 const char *p1st = NULL; 441 const char *p2nd = NULL; 442 443 if (pid_pos >= 0 && tms_pos >= 0) { 444 // contains both %p and %t 445 if (pid_pos < tms_pos) { 446 // case foo%pbar%tmonkey.log 447 first = pid_pos; 448 p1st = pid_text; 449 second = tms_pos; 450 p2nd = tms; 451 } else { 452 // case foo%tbar%pmonkey.log 453 first = tms_pos; 454 p1st = tms; 455 second = pid_pos; 456 p2nd = pid_text; 457 } 458 } else if (pid_pos >= 0) { 459 // contains %p only 460 first = pid_pos; 461 p1st = pid_text; 462 } else if (tms_pos >= 0) { 463 // contains %t only 464 first = tms_pos; 465 p1st = tms; 466 } 467 468 int buf_pos = (int)strlen(buf); 469 const char* tail = nametail; 470 471 if (first >= 0) { 472 tail = nametail + first + 2; 473 strncpy(&buf[buf_pos], nametail, first); 474 strcpy(&buf[buf_pos + first], p1st); 475 buf_pos = (int)strlen(buf); 476 if (second >= 0) { 477 strncpy(&buf[buf_pos], tail, second - first - 2); 478 strcpy(&buf[buf_pos + second - first - 2], p2nd); 479 tail = nametail + second + 2; 480 } 481 } 482 strcat(buf, tail); // append rest of name, or all of name 483 return buf; 484 } 485 486 // log_name comes from -XX:LogFile=log_name or 487 // -XX:DumpLoadedClassList=<file_name> 488 // in log_name, %p => pid1234 and 489 // %t => YYYY-MM-DD_HH-MM-SS 490 static const char* make_log_name(const char* log_name, const char* force_directory) { 491 char timestr[32]; 492 get_datetime_string(timestr, sizeof(timestr)); 493 return make_log_name_internal(log_name, force_directory, os::current_process_id(), 494 timestr); 495 } 496 497 fileStream::fileStream(const char* file_name) { 498 _file = fopen(file_name, "w"); 499 if (_file != NULL) { 500 _need_close = true; 501 } else { 502 warning("Cannot open file %s due to %s\n", file_name, os::strerror(errno)); 503 _need_close = false; 504 } 505 } 506 507 fileStream::fileStream(const char* file_name, const char* opentype) { 508 _file = fopen(file_name, opentype); 509 if (_file != NULL) { 510 _need_close = true; 511 } else { 512 warning("Cannot open file %s due to %s\n", file_name, os::strerror(errno)); 513 _need_close = false; 514 } 515 } 516 517 void fileStream::write(const char* s, size_t len) { 518 if (_file != NULL) { 519 // Make an unused local variable to avoid warning from gcc 4.x compiler. 520 size_t count = fwrite(s, 1, len, _file); 521 } 522 update_position(s, len); 523 } 524 525 long fileStream::fileSize() { 526 long size = -1; 527 if (_file != NULL) { 528 long pos = ::ftell(_file); 529 if (::fseek(_file, 0, SEEK_END) == 0) { 530 size = ::ftell(_file); 531 } 532 ::fseek(_file, pos, SEEK_SET); 533 } 534 return size; 535 } 536 537 char* fileStream::readln(char *data, int count ) { 538 char * ret = ::fgets(data, count, _file); 539 //Get rid of annoying \n char 540 data[::strlen(data)-1] = '\0'; 541 return ret; 542 } 543 544 fileStream::~fileStream() { 545 if (_file != NULL) { 546 if (_need_close) fclose(_file); 547 _file = NULL; 548 } 549 } 550 551 void fileStream::flush() { 552 fflush(_file); 553 } 554 555 fdStream::fdStream(const char* file_name) { 556 _fd = open(file_name, O_WRONLY | O_CREAT | O_TRUNC, 0666); 557 _need_close = true; 558 } 559 560 fdStream::~fdStream() { 561 if (_fd != -1) { 562 if (_need_close) close(_fd); 563 _fd = -1; 564 } 565 } 566 567 void fdStream::write(const char* s, size_t len) { 568 if (_fd != -1) { 569 // Make an unused local variable to avoid warning from gcc 4.x compiler. 570 size_t count = ::write(_fd, s, (int)len); 571 } 572 update_position(s, len); 573 } 574 575 defaultStream* defaultStream::instance = NULL; 576 int defaultStream::_output_fd = 1; 577 int defaultStream::_error_fd = 2; 578 FILE* defaultStream::_output_stream = stdout; 579 FILE* defaultStream::_error_stream = stderr; 580 581 #define LOG_MAJOR_VERSION 160 582 #define LOG_MINOR_VERSION 1 583 584 void defaultStream::init() { 585 _inited = true; 586 if (LogVMOutput || LogCompilation) { 587 init_log(); 588 } 589 } 590 591 bool defaultStream::has_log_file() { 592 // lazily create log file (at startup, LogVMOutput is false even 593 // if +LogVMOutput is used, because the flags haven't been parsed yet) 594 // For safer printing during fatal error handling, do not init logfile 595 // if a VM error has been reported. 596 if (!_inited && !VMError::is_error_reported()) init(); 597 return _log_file != NULL; 598 } 599 600 fileStream* defaultStream::open_file(const char* log_name) { 601 const char* try_name = make_log_name(log_name, NULL); 602 if (try_name == NULL) { 603 warning("Cannot open file %s: file name is too long.\n", log_name); 604 return NULL; 605 } 606 607 fileStream* file = new(ResourceObj::C_HEAP, mtInternal) fileStream(try_name); 608 FREE_C_HEAP_ARRAY(char, try_name); 609 if (file->is_open()) { 610 return file; 611 } 612 613 // Try again to open the file in the temp directory. 614 delete file; 615 char warnbuf[O_BUFLEN*2]; 616 jio_snprintf(warnbuf, sizeof(warnbuf), "Warning: Cannot open log file: %s\n", log_name); 617 // Note: This feature is for maintainer use only. No need for L10N. 618 jio_print(warnbuf); 619 try_name = make_log_name(log_name, os::get_temp_directory()); 620 if (try_name == NULL) { 621 warning("Cannot open file %s: file name is too long for directory %s.\n", log_name, os::get_temp_directory()); 622 return NULL; 623 } 624 625 jio_snprintf(warnbuf, sizeof(warnbuf), 626 "Warning: Forcing option -XX:LogFile=%s\n", try_name); 627 jio_print(warnbuf); 628 629 file = new(ResourceObj::C_HEAP, mtInternal) fileStream(try_name); 630 FREE_C_HEAP_ARRAY(char, try_name); 631 if (file->is_open()) { 632 return file; 633 } 634 635 delete file; 636 return NULL; 637 } 638 639 void defaultStream::init_log() { 640 // %%% Need a MutexLocker? 641 const char* log_name = LogFile != NULL ? LogFile : "hotspot_%p.log"; 642 fileStream* file = open_file(log_name); 643 644 if (file != NULL) { 645 _log_file = file; 646 _outer_xmlStream = new(ResourceObj::C_HEAP, mtInternal) xmlStream(file); 647 start_log(); 648 } else { 649 // and leave xtty as NULL 650 LogVMOutput = false; 651 DisplayVMOutput = true; 652 LogCompilation = false; 653 } 654 } 655 656 void defaultStream::start_log() { 657 xmlStream*xs = _outer_xmlStream; 658 if (this == tty) xtty = xs; 659 // Write XML header. 660 xs->print_cr("<?xml version='1.0' encoding='UTF-8'?>"); 661 // (For now, don't bother to issue a DTD for this private format.) 662 jlong time_ms = os::javaTimeMillis() - tty->time_stamp().milliseconds(); 663 // %%% Should be: jlong time_ms = os::start_time_milliseconds(), if 664 // we ever get round to introduce that method on the os class 665 xs->head("hotspot_log version='%d %d'" 666 " process='%d' time_ms='" INT64_FORMAT "'", 667 LOG_MAJOR_VERSION, LOG_MINOR_VERSION, 668 os::current_process_id(), (int64_t)time_ms); 669 // Write VM version header immediately. 670 xs->head("vm_version"); 671 xs->head("name"); xs->text("%s", VM_Version::vm_name()); xs->cr(); 672 xs->tail("name"); 673 xs->head("release"); xs->text("%s", VM_Version::vm_release()); xs->cr(); 674 xs->tail("release"); 675 xs->head("info"); xs->text("%s", VM_Version::internal_vm_info_string()); xs->cr(); 676 xs->tail("info"); 677 xs->tail("vm_version"); 678 // Record information about the command-line invocation. 679 xs->head("vm_arguments"); // Cf. Arguments::print_on() 680 if (Arguments::num_jvm_flags() > 0) { 681 xs->head("flags"); 682 Arguments::print_jvm_flags_on(xs->text()); 683 xs->tail("flags"); 684 } 685 if (Arguments::num_jvm_args() > 0) { 686 xs->head("args"); 687 Arguments::print_jvm_args_on(xs->text()); 688 xs->tail("args"); 689 } 690 if (Arguments::java_command() != NULL) { 691 xs->head("command"); xs->text()->print_cr("%s", Arguments::java_command()); 692 xs->tail("command"); 693 } 694 if (Arguments::sun_java_launcher() != NULL) { 695 xs->head("launcher"); xs->text()->print_cr("%s", Arguments::sun_java_launcher()); 696 xs->tail("launcher"); 697 } 698 if (Arguments::system_properties() != NULL) { 699 xs->head("properties"); 700 // Print it as a java-style property list. 701 // System properties don't generally contain newlines, so don't bother with unparsing. 702 outputStream *text = xs->text(); 703 for (SystemProperty* p = Arguments::system_properties(); p != NULL; p = p->next()) { 704 assert(p->key() != NULL, "p->key() is NULL"); 705 if (p->is_readable()) { 706 // Print in two stages to avoid problems with long 707 // keys/values. 708 text->print_raw(p->key()); 709 text->put('='); 710 assert(p->value() != NULL, "p->value() is NULL"); 711 text->print_raw_cr(p->value()); 712 } 713 } 714 xs->tail("properties"); 715 } 716 xs->tail("vm_arguments"); 717 // tty output per se is grouped under the <tty>...</tty> element. 718 xs->head("tty"); 719 // All further non-markup text gets copied to the tty: 720 xs->_text = this; // requires friend declaration! 721 } 722 723 // finish_log() is called during normal VM shutdown. finish_log_on_error() is 724 // called by ostream_abort() after a fatal error. 725 // 726 void defaultStream::finish_log() { 727 xmlStream* xs = _outer_xmlStream; 728 xs->done("tty"); 729 730 // Other log forks are appended here, at the End of Time: 731 CompileLog::finish_log(xs->out()); // write compile logging, if any, now 732 733 xs->done("hotspot_log"); 734 xs->flush(); 735 736 fileStream* file = _log_file; 737 _log_file = NULL; 738 739 delete _outer_xmlStream; 740 _outer_xmlStream = NULL; 741 742 file->flush(); 743 delete file; 744 } 745 746 void defaultStream::finish_log_on_error(char *buf, int buflen) { 747 xmlStream* xs = _outer_xmlStream; 748 749 if (xs && xs->out()) { 750 751 xs->done_raw("tty"); 752 753 // Other log forks are appended here, at the End of Time: 754 CompileLog::finish_log_on_error(xs->out(), buf, buflen); // write compile logging, if any, now 755 756 xs->done_raw("hotspot_log"); 757 xs->flush(); 758 759 fileStream* file = _log_file; 760 _log_file = NULL; 761 _outer_xmlStream = NULL; 762 763 if (file) { 764 file->flush(); 765 766 // Can't delete or close the file because delete and fclose aren't 767 // async-safe. We are about to die, so leave it to the kernel. 768 // delete file; 769 } 770 } 771 } 772 773 intx defaultStream::hold(intx writer_id) { 774 bool has_log = has_log_file(); // check before locking 775 if (// impossible, but who knows? 776 writer_id == NO_WRITER || 777 778 // bootstrap problem 779 tty_lock == NULL || 780 781 // can't grab a lock if current Thread isn't set 782 Thread::current_or_null() == NULL || 783 784 // developer hook 785 !SerializeVMOutput || 786 787 // VM already unhealthy 788 VMError::is_error_reported() || 789 790 // safepoint == global lock (for VM only) 791 (SafepointSynchronize::is_synchronizing() && 792 Thread::current()->is_VM_thread()) 793 ) { 794 // do not attempt to lock unless we know the thread and the VM is healthy 795 return NO_WRITER; 796 } 797 if (_writer == writer_id) { 798 // already held, no need to re-grab the lock 799 return NO_WRITER; 800 } 801 tty_lock->lock_without_safepoint_check(); 802 // got the lock 803 if (writer_id != _last_writer) { 804 if (has_log) { 805 _log_file->bol(); 806 // output a hint where this output is coming from: 807 _log_file->print_cr("<writer thread='" UINTX_FORMAT "'/>", writer_id); 808 } 809 _last_writer = writer_id; 810 } 811 _writer = writer_id; 812 return writer_id; 813 } 814 815 void defaultStream::release(intx holder) { 816 if (holder == NO_WRITER) { 817 // nothing to release: either a recursive lock, or we scribbled (too bad) 818 return; 819 } 820 if (_writer != holder) { 821 return; // already unlocked, perhaps via break_tty_lock_for_safepoint 822 } 823 _writer = NO_WRITER; 824 tty_lock->unlock(); 825 } 826 827 828 // Yuck: jio_print does not accept char*/len. 829 static void call_jio_print(const char* s, size_t len) { 830 char buffer[O_BUFLEN+100]; 831 if (len > sizeof(buffer)-1) { 832 warning("increase O_BUFLEN in ostream.cpp -- output truncated"); 833 len = sizeof(buffer)-1; 834 } 835 strncpy(buffer, s, len); 836 buffer[len] = '\0'; 837 jio_print(buffer); 838 } 839 840 841 void defaultStream::write(const char* s, size_t len) { 842 intx thread_id = os::current_thread_id(); 843 intx holder = hold(thread_id); 844 845 if (DisplayVMOutput && 846 (_outer_xmlStream == NULL || !_outer_xmlStream->inside_attrs())) { 847 // print to output stream. It can be redirected by a vfprintf hook 848 if (s[len] == '\0') { 849 jio_print(s); 850 } else { 851 call_jio_print(s, len); 852 } 853 } 854 855 // print to log file 856 if (has_log_file()) { 857 int nl0 = _newlines; 858 xmlTextStream::write(s, len); 859 // flush the log file too, if there were any newlines 860 if (nl0 != _newlines){ 861 flush(); 862 } 863 } else { 864 update_position(s, len); 865 } 866 867 release(holder); 868 } 869 870 intx ttyLocker::hold_tty() { 871 if (defaultStream::instance == NULL) return defaultStream::NO_WRITER; 872 intx thread_id = os::current_thread_id(); 873 return defaultStream::instance->hold(thread_id); 874 } 875 876 void ttyLocker::release_tty(intx holder) { 877 if (holder == defaultStream::NO_WRITER) return; 878 defaultStream::instance->release(holder); 879 } 880 881 bool ttyLocker::release_tty_if_locked() { 882 intx thread_id = os::current_thread_id(); 883 if (defaultStream::instance->writer() == thread_id) { 884 // release the lock and return true so callers know if was 885 // previously held. 886 release_tty(thread_id); 887 return true; 888 } 889 return false; 890 } 891 892 void ttyLocker::break_tty_lock_for_safepoint(intx holder) { 893 if (defaultStream::instance != NULL && 894 defaultStream::instance->writer() == holder) { 895 if (xtty != NULL) { 896 xtty->print_cr("<!-- safepoint while printing -->"); 897 } 898 defaultStream::instance->release(holder); 899 } 900 // (else there was no lock to break) 901 } 902 903 void ostream_init() { 904 if (defaultStream::instance == NULL) { 905 defaultStream::instance = new(ResourceObj::C_HEAP, mtInternal) defaultStream(); 906 tty = defaultStream::instance; 907 908 // We want to ensure that time stamps in GC logs consider time 0 909 // the time when the JVM is initialized, not the first time we ask 910 // for a time stamp. So, here, we explicitly update the time stamp 911 // of tty. 912 tty->time_stamp().update_to(1); 913 } 914 } 915 916 void ostream_init_log() { 917 // Note : this must be called AFTER ostream_init() 918 919 #if INCLUDE_CDS 920 // For -XX:DumpLoadedClassList=<file> option 921 if (DumpLoadedClassList != NULL) { 922 const char* list_name = make_log_name(DumpLoadedClassList, NULL); 923 classlist_file = new(ResourceObj::C_HEAP, mtInternal) 924 fileStream(list_name); 925 FREE_C_HEAP_ARRAY(char, list_name); 926 } 927 #endif 928 929 // If we haven't lazily initialized the logfile yet, do it now, 930 // to avoid the possibility of lazy initialization during a VM 931 // crash, which can affect the stability of the fatal error handler. 932 defaultStream::instance->has_log_file(); 933 } 934 935 // ostream_exit() is called during normal VM exit to finish log files, flush 936 // output and free resource. 937 void ostream_exit() { 938 static bool ostream_exit_called = false; 939 if (ostream_exit_called) return; 940 ostream_exit_called = true; 941 #if INCLUDE_CDS 942 if (classlist_file != NULL) { 943 delete classlist_file; 944 } 945 #endif 946 if (tty != defaultStream::instance) { 947 delete tty; 948 } 949 if (defaultStream::instance != NULL) { 950 delete defaultStream::instance; 951 } 952 tty = NULL; 953 xtty = NULL; 954 defaultStream::instance = NULL; 955 } 956 957 // ostream_abort() is called by os::abort() when VM is about to die. 958 void ostream_abort() { 959 // Here we can't delete tty, just flush its output 960 if (tty) tty->flush(); 961 962 if (defaultStream::instance != NULL) { 963 static char buf[4096]; 964 defaultStream::instance->finish_log_on_error(buf, sizeof(buf)); 965 } 966 } 967 968 bufferedStream::bufferedStream(size_t initial_size, size_t bufmax) : outputStream() { 969 buffer_length = initial_size; 970 buffer = NEW_C_HEAP_ARRAY(char, buffer_length, mtInternal); 971 buffer_pos = 0; 972 buffer_fixed = false; 973 buffer_max = bufmax; 974 } 975 976 bufferedStream::bufferedStream(char* fixed_buffer, size_t fixed_buffer_size, size_t bufmax) : outputStream() { 977 buffer_length = fixed_buffer_size; 978 buffer = fixed_buffer; 979 buffer_pos = 0; 980 buffer_fixed = true; 981 buffer_max = bufmax; 982 } 983 984 void bufferedStream::write(const char* s, size_t len) { 985 986 if(buffer_pos + len > buffer_max) { 987 flush(); 988 } 989 990 size_t end = buffer_pos + len; 991 if (end >= buffer_length) { 992 if (buffer_fixed) { 993 // if buffer cannot resize, silently truncate 994 len = buffer_length - buffer_pos - 1; 995 } else { 996 // For small overruns, double the buffer. For larger ones, 997 // increase to the requested size. 998 if (end < buffer_length * 2) { 999 end = buffer_length * 2; 1000 } 1001 buffer = REALLOC_C_HEAP_ARRAY(char, buffer, end, mtInternal); 1002 buffer_length = end; 1003 } 1004 } 1005 memcpy(buffer + buffer_pos, s, len); 1006 buffer_pos += len; 1007 update_position(s, len); 1008 } 1009 1010 char* bufferedStream::as_string() { 1011 char* copy = NEW_RESOURCE_ARRAY(char, buffer_pos+1); 1012 strncpy(copy, buffer, buffer_pos); 1013 copy[buffer_pos] = 0; // terminating null 1014 return copy; 1015 } 1016 1017 bufferedStream::~bufferedStream() { 1018 if (!buffer_fixed) { 1019 FREE_C_HEAP_ARRAY(char, buffer); 1020 } 1021 } 1022 1023 #ifndef PRODUCT 1024 1025 #if defined(SOLARIS) || defined(LINUX) || defined(AIX) || defined(_ALLBSD_SOURCE) 1026 #include <sys/types.h> 1027 #include <sys/socket.h> 1028 #include <netinet/in.h> 1029 #include <arpa/inet.h> 1030 #elif defined(_WINDOWS) 1031 #include <winsock2.h> 1032 #endif 1033 1034 // Network access 1035 networkStream::networkStream() : bufferedStream(1024*10, 1024*10) { 1036 1037 _socket = -1; 1038 1039 int result = os::socket(AF_INET, SOCK_STREAM, 0); 1040 if (result <= 0) { 1041 assert(false, "Socket could not be created!"); 1042 } else { 1043 _socket = result; 1044 } 1045 } 1046 1047 int networkStream::read(char *buf, size_t len) { 1048 return os::recv(_socket, buf, (int)len, 0); 1049 } 1050 1051 void networkStream::flush() { 1052 if (size() != 0) { 1053 int result = os::raw_send(_socket, (char *)base(), size(), 0); 1054 assert(result != -1, "connection error"); 1055 assert(result == (int)size(), "didn't send enough data"); 1056 } 1057 reset(); 1058 } 1059 1060 networkStream::~networkStream() { 1061 close(); 1062 } 1063 1064 void networkStream::close() { 1065 if (_socket != -1) { 1066 flush(); 1067 os::socket_close(_socket); 1068 _socket = -1; 1069 } 1070 } 1071 1072 bool networkStream::connect(const char *ip, short port) { 1073 1074 struct sockaddr_in server; 1075 server.sin_family = AF_INET; 1076 server.sin_port = htons(port); 1077 1078 server.sin_addr.s_addr = inet_addr(ip); 1079 if (server.sin_addr.s_addr == (uint32_t)-1) { 1080 struct hostent* host = os::get_host_by_name((char*)ip); 1081 if (host != NULL) { 1082 memcpy(&server.sin_addr, host->h_addr_list[0], host->h_length); 1083 } else { 1084 return false; 1085 } 1086 } 1087 1088 1089 int result = os::connect(_socket, (struct sockaddr*)&server, sizeof(struct sockaddr_in)); 1090 return (result >= 0); 1091 } 1092 1093 #endif