1 /*
   2  * Copyright (c) 1997, 2016, Oracle and/or its affiliates. All rights reserved.
   3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   4  *
   5  * This code is free software; you can redistribute it and/or modify it
   6  * under the terms of the GNU General Public License version 2 only, as
   7  * published by the Free Software Foundation.
   8  *
   9  * This code is distributed in the hope that it will be useful, but WITHOUT
  10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  12  * version 2 for more details (a copy is included in the LICENSE file that
  13  * accompanied this code).
  14  *
  15  * You should have received a copy of the GNU General Public License version
  16  * 2 along with this work; if not, write to the Free Software Foundation,
  17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  18  *
  19  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  20  * or visit www.oracle.com if you need additional information or have any
  21  * questions.
  22  *
  23  */
  24 
  25 #include "precompiled.hpp"
  26 #include "compiler/compileLog.hpp"
  27 #include "oops/oop.inline.hpp"
  28 #include "runtime/arguments.hpp"
  29 #include "runtime/os.hpp"
  30 #include "runtime/vm_version.hpp"
  31 #include "utilities/defaultStream.hpp"
  32 #include "utilities/macros.hpp"
  33 #include "utilities/ostream.hpp"
  34 #include "utilities/xmlstream.hpp"
  35 
  36 extern "C" void jio_print(const char* s); // Declarationtion of jvm method
  37 
  38 outputStream::outputStream(int width) {
  39   _width       = width;
  40   _position    = 0;
  41   _newlines    = 0;
  42   _precount    = 0;
  43   _indentation = 0;
  44   _scratch     = NULL;
  45   _scratch_len = 0;
  46 }
  47 
  48 outputStream::outputStream(int width, bool has_time_stamps) {
  49   _width       = width;
  50   _position    = 0;
  51   _newlines    = 0;
  52   _precount    = 0;
  53   _indentation = 0;
  54   _scratch     = NULL;
  55   _scratch_len = 0;
  56   if (has_time_stamps)  _stamp.update();
  57 }
  58 
  59 void outputStream::update_position(const char* s, size_t len) {
  60   for (size_t i = 0; i < len; i++) {
  61     char ch = s[i];
  62     if (ch == '\n') {
  63       _newlines += 1;
  64       _precount += _position + 1;
  65       _position = 0;
  66     } else if (ch == '\t') {
  67       int tw = 8 - (_position & 7);
  68       _position += tw;
  69       _precount -= tw-1;  // invariant:  _precount + _position == total count
  70     } else {
  71       _position += 1;
  72     }
  73   }
  74 }
  75 
  76 // Execute a vsprintf, using the given buffer if necessary.
  77 // Return a pointer to the formatted string.
  78 const char* outputStream::do_vsnprintf(char* buffer, size_t buflen,
  79                                        const char* format, va_list ap,
  80                                        bool add_cr,
  81                                        size_t& result_len) {
  82   assert(buflen >= 2, "buffer too small");
  83 
  84   const char* result;
  85   if (add_cr)  buflen--;
  86   if (!strchr(format, '%')) {
  87     // constant format string
  88     result = format;
  89     result_len = strlen(result);
  90     if (add_cr && result_len >= buflen)  result_len = buflen-1;  // truncate
  91   } else if (format[0] == '%' && format[1] == 's' && format[2] == '\0') {
  92     // trivial copy-through format string
  93     result = va_arg(ap, const char*);
  94     result_len = strlen(result);
  95     if (add_cr && result_len >= buflen)  result_len = buflen-1;  // truncate
  96   } else {
  97     // Handle truncation:
  98     // posix: upon truncation, vsnprintf returns number of bytes which
  99     //   would have been written (excluding terminating zero) had the buffer
 100     //   been large enough
 101     // windows: upon truncation, vsnprintf returns -1
 102     const int written = vsnprintf(buffer, buflen, format, ap);
 103     result = buffer;
 104     if (written < (int) buflen && written >= 0) {
 105       result_len = written;
 106     } else {
 107       DEBUG_ONLY(warning("increase O_BUFLEN in ostream.hpp -- output truncated");)
 108       result_len = buflen - 1;
 109       buffer[result_len] = 0;
 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::stamp() {
 210   if (! _stamp.is_updated()) {
 211     _stamp.update(); // start at 0 on first call to stamp()
 212   }
 213 
 214   // outputStream::stamp() may get called by ostream_abort(), use snprintf
 215   // to avoid allocating large stack buffer in print().
 216   char buf[40];
 217   jio_snprintf(buf, sizeof(buf), "%.3f", _stamp.seconds());
 218   print_raw(buf);
 219 }
 220 
 221 void outputStream::stamp(bool guard,
 222                          const char* prefix,
 223                          const char* suffix) {
 224   if (!guard) {
 225     return;
 226   }
 227   print_raw(prefix);
 228   stamp();
 229   print_raw(suffix);
 230 }
 231 
 232 void outputStream::date_stamp(bool guard,
 233                               const char* prefix,
 234                               const char* suffix) {
 235   if (!guard) {
 236     return;
 237   }
 238   print_raw(prefix);
 239   static const char error_time[] = "yyyy-mm-ddThh:mm:ss.mmm+zzzz";
 240   static const int buffer_length = 32;
 241   char buffer[buffer_length];
 242   const char* iso8601_result = os::iso8601_time(buffer, buffer_length);
 243   if (iso8601_result != NULL) {
 244     print_raw(buffer);
 245   } else {
 246     print_raw(error_time);
 247   }
 248   print_raw(suffix);
 249   return;
 250 }
 251 
 252 outputStream& outputStream::indent() {
 253   while (_position < _indentation) sp();
 254   return *this;
 255 }
 256 
 257 void outputStream::print_jlong(jlong value) {
 258   print(JLONG_FORMAT, value);
 259 }
 260 
 261 void outputStream::print_julong(julong value) {
 262   print(JULONG_FORMAT, value);
 263 }
 264 
 265 /**
 266  * This prints out hex data in a 'windbg' or 'xxd' form, where each line is:
 267  *   <hex-address>: 8 * <hex-halfword> <ascii translation (optional)>
 268  * example:
 269  * 0000000: 7f44 4f46 0102 0102 0000 0000 0000 0000  .DOF............
 270  * 0000010: 0000 0000 0000 0040 0000 0020 0000 0005  .......@... ....
 271  * 0000020: 0000 0000 0000 0040 0000 0000 0000 015d  .......@.......]
 272  * ...
 273  *
 274  * indent is applied to each line.  Ends with a CR.
 275  */
 276 void outputStream::print_data(void* data, size_t len, bool with_ascii) {
 277   size_t limit = (len + 16) / 16 * 16;
 278   for (size_t i = 0; i < limit; ++i) {
 279     if (i % 16 == 0) {
 280       indent().print(INTPTR_FORMAT_W(07) ":", i);
 281     }
 282     if (i % 2 == 0) {
 283       print(" ");
 284     }
 285     if (i < len) {
 286       print("%02x", ((unsigned char*)data)[i]);
 287     } else {
 288       print("  ");
 289     }
 290     if ((i + 1) % 16 == 0) {
 291       if (with_ascii) {
 292         print("  ");
 293         for (size_t j = 0; j < 16; ++j) {
 294           size_t idx = i + j - 15;
 295           if (idx < len) {
 296             char c = ((char*)data)[idx];
 297             print("%c", c >= 32 && c <= 126 ? c : '.');
 298           }
 299         }
 300       }
 301       cr();
 302     }
 303   }
 304 }
 305 
 306 stringStream::stringStream(size_t initial_size) : outputStream() {
 307   buffer_length = initial_size;
 308   buffer        = NEW_RESOURCE_ARRAY(char, buffer_length);
 309   buffer_pos    = 0;
 310   buffer_fixed  = false;
 311   DEBUG_ONLY(rm = Thread::current()->current_resource_mark();)
 312 }
 313 
 314 // useful for output to fixed chunks of memory, such as performance counters
 315 stringStream::stringStream(char* fixed_buffer, size_t fixed_buffer_size) : outputStream() {
 316   buffer_length = fixed_buffer_size;
 317   buffer        = fixed_buffer;
 318   buffer_pos    = 0;
 319   buffer_fixed  = true;
 320 }
 321 
 322 void stringStream::write(const char* s, size_t len) {
 323   size_t write_len = len;               // number of non-null bytes to write
 324   size_t end = buffer_pos + len + 1;    // position after write and final '\0'
 325   if (end > buffer_length) {
 326     if (buffer_fixed) {
 327       // if buffer cannot resize, silently truncate
 328       end = buffer_length;
 329       write_len = end - buffer_pos - 1; // leave room for the final '\0'
 330     } else {
 331       // For small overruns, double the buffer.  For larger ones,
 332       // increase to the requested size.
 333       if (end < buffer_length * 2) {
 334         end = buffer_length * 2;
 335       }
 336       char* oldbuf = buffer;
 337       assert(rm == NULL || Thread::current()->current_resource_mark() == rm,
 338              "StringStream is re-allocated with a different ResourceMark. Current: "
 339              PTR_FORMAT " original: " PTR_FORMAT,
 340              p2i(Thread::current()->current_resource_mark()), p2i(rm));
 341       buffer = NEW_RESOURCE_ARRAY(char, end);
 342       if (buffer_pos > 0) {
 343         memcpy(buffer, oldbuf, buffer_pos);
 344       }
 345       buffer_length = end;
 346     }
 347   }
 348   // invariant: buffer is always null-terminated
 349   guarantee(buffer_pos + write_len + 1 <= buffer_length, "stringStream oob");
 350   if (write_len > 0) {
 351     buffer[buffer_pos + write_len] = 0;
 352     memcpy(buffer + buffer_pos, s, write_len);
 353     buffer_pos += write_len;
 354   }
 355 
 356   // Note that the following does not depend on write_len.
 357   // This means that position and count get updated
 358   // even when overflow occurs.
 359   update_position(s, len);
 360 }
 361 
 362 char* stringStream::as_string() {
 363   char* copy = NEW_RESOURCE_ARRAY(char, buffer_pos + 1);
 364   strncpy(copy, buffer, buffer_pos);
 365   copy[buffer_pos] = 0;  // terminating null
 366   return copy;
 367 }
 368 
 369 stringStream::~stringStream() {}
 370 
 371 xmlStream*   xtty;
 372 outputStream* tty;
 373 CDS_ONLY(fileStream* classlist_file;) // Only dump the classes that can be stored into the CDS archive
 374 extern Mutex* tty_lock;
 375 
 376 #define EXTRACHARLEN   32
 377 #define CURRENTAPPX    ".current"
 378 // convert YYYY-MM-DD HH:MM:SS to YYYY-MM-DD_HH-MM-SS
 379 char* get_datetime_string(char *buf, size_t len) {
 380   os::local_time_string(buf, len);
 381   int i = (int)strlen(buf);
 382   while (--i >= 0) {
 383     if (buf[i] == ' ') buf[i] = '_';
 384     else if (buf[i] == ':') buf[i] = '-';
 385   }
 386   return buf;
 387 }
 388 
 389 static const char* make_log_name_internal(const char* log_name, const char* force_directory,
 390                                                 int pid, const char* tms) {
 391   const char* basename = log_name;
 392   char file_sep = os::file_separator()[0];
 393   const char* cp;
 394   char  pid_text[32];
 395 
 396   for (cp = log_name; *cp != '\0'; cp++) {
 397     if (*cp == '/' || *cp == file_sep) {
 398       basename = cp + 1;
 399     }
 400   }
 401   const char* nametail = log_name;
 402   // Compute buffer length
 403   size_t buffer_length;
 404   if (force_directory != NULL) {
 405     buffer_length = strlen(force_directory) + strlen(os::file_separator()) +
 406                     strlen(basename) + 1;
 407   } else {
 408     buffer_length = strlen(log_name) + 1;
 409   }
 410 
 411   const char* pts = strstr(basename, "%p");
 412   int pid_pos = (pts == NULL) ? -1 : (pts - nametail);
 413 
 414   if (pid_pos >= 0) {
 415     jio_snprintf(pid_text, sizeof(pid_text), "pid%u", pid);
 416     buffer_length += strlen(pid_text);
 417   }
 418 
 419   pts = strstr(basename, "%t");
 420   int tms_pos = (pts == NULL) ? -1 : (pts - nametail);
 421   if (tms_pos >= 0) {
 422     buffer_length += strlen(tms);
 423   }
 424 
 425   // File name is too long.
 426   if (buffer_length > JVM_MAXPATHLEN) {
 427     return NULL;
 428   }
 429 
 430   // Create big enough buffer.
 431   char *buf = NEW_C_HEAP_ARRAY(char, buffer_length, mtInternal);
 432 
 433   strcpy(buf, "");
 434   if (force_directory != NULL) {
 435     strcat(buf, force_directory);
 436     strcat(buf, os::file_separator());
 437     nametail = basename;       // completely skip directory prefix
 438   }
 439 
 440   // who is first, %p or %t?
 441   int first = -1, second = -1;
 442   const char *p1st = NULL;
 443   const char *p2nd = NULL;
 444 
 445   if (pid_pos >= 0 && tms_pos >= 0) {
 446     // contains both %p and %t
 447     if (pid_pos < tms_pos) {
 448       // case foo%pbar%tmonkey.log
 449       first  = pid_pos;
 450       p1st   = pid_text;
 451       second = tms_pos;
 452       p2nd   = tms;
 453     } else {
 454       // case foo%tbar%pmonkey.log
 455       first  = tms_pos;
 456       p1st   = tms;
 457       second = pid_pos;
 458       p2nd   = pid_text;
 459     }
 460   } else if (pid_pos >= 0) {
 461     // contains %p only
 462     first  = pid_pos;
 463     p1st   = pid_text;
 464   } else if (tms_pos >= 0) {
 465     // contains %t only
 466     first  = tms_pos;
 467     p1st   = tms;
 468   }
 469 
 470   int buf_pos = (int)strlen(buf);
 471   const char* tail = nametail;
 472 
 473   if (first >= 0) {
 474     tail = nametail + first + 2;
 475     strncpy(&buf[buf_pos], nametail, first);
 476     strcpy(&buf[buf_pos + first], p1st);
 477     buf_pos = (int)strlen(buf);
 478     if (second >= 0) {
 479       strncpy(&buf[buf_pos], tail, second - first - 2);
 480       strcpy(&buf[buf_pos + second - first - 2], p2nd);
 481       tail = nametail + second + 2;
 482     }
 483   }
 484   strcat(buf, tail);      // append rest of name, or all of name
 485   return buf;
 486 }
 487 
 488 // log_name comes from -XX:LogFile=log_name or
 489 // -XX:DumpLoadedClassList=<file_name>
 490 // in log_name, %p => pid1234 and
 491 //              %t => YYYY-MM-DD_HH-MM-SS
 492 static const char* make_log_name(const char* log_name, const char* force_directory) {
 493   char timestr[32];
 494   get_datetime_string(timestr, sizeof(timestr));
 495   return make_log_name_internal(log_name, force_directory, os::current_process_id(),
 496                                 timestr);
 497 }
 498 
 499 fileStream::fileStream(const char* file_name) {
 500   _file = fopen(file_name, "w");
 501   if (_file != NULL) {
 502     _need_close = true;
 503   } else {
 504     warning("Cannot open file %s due to %s\n", file_name, os::strerror(errno));
 505     _need_close = false;
 506   }
 507 }
 508 
 509 fileStream::fileStream(const char* file_name, const char* opentype) {
 510   _file = fopen(file_name, opentype);
 511   if (_file != NULL) {
 512     _need_close = true;
 513   } else {
 514     warning("Cannot open file %s due to %s\n", file_name, os::strerror(errno));
 515     _need_close = false;
 516   }
 517 }
 518 
 519 void fileStream::write(const char* s, size_t len) {
 520   if (_file != NULL)  {
 521     // Make an unused local variable to avoid warning from gcc 4.x compiler.
 522     size_t count = fwrite(s, 1, len, _file);
 523   }
 524   update_position(s, len);
 525 }
 526 
 527 long fileStream::fileSize() {
 528   long size = -1;
 529   if (_file != NULL) {
 530     long pos  = ::ftell(_file);
 531     if (::fseek(_file, 0, SEEK_END) == 0) {
 532       size = ::ftell(_file);
 533     }
 534     ::fseek(_file, pos, SEEK_SET);
 535   }
 536   return size;
 537 }
 538 
 539 char* fileStream::readln(char *data, int count ) {
 540   char * ret = ::fgets(data, count, _file);
 541   //Get rid of annoying \n char
 542   data[::strlen(data)-1] = '\0';
 543   return ret;
 544 }
 545 
 546 fileStream::~fileStream() {
 547   if (_file != NULL) {
 548     if (_need_close) fclose(_file);
 549     _file      = NULL;
 550   }
 551 }
 552 
 553 void fileStream::flush() {
 554   fflush(_file);
 555 }
 556 
 557 fdStream::fdStream(const char* file_name) {
 558   _fd = open(file_name, O_WRONLY | O_CREAT | O_TRUNC, 0666);
 559   _need_close = true;
 560 }
 561 
 562 fdStream::~fdStream() {
 563   if (_fd != -1) {
 564     if (_need_close) close(_fd);
 565     _fd = -1;
 566   }
 567 }
 568 
 569 void fdStream::write(const char* s, size_t len) {
 570   if (_fd != -1) {
 571     // Make an unused local variable to avoid warning from gcc 4.x compiler.
 572     size_t count = ::write(_fd, s, (int)len);
 573   }
 574   update_position(s, len);
 575 }
 576 
 577 defaultStream* defaultStream::instance = NULL;
 578 int defaultStream::_output_fd = 1;
 579 int defaultStream::_error_fd  = 2;
 580 FILE* defaultStream::_output_stream = stdout;
 581 FILE* defaultStream::_error_stream  = stderr;
 582 
 583 #define LOG_MAJOR_VERSION 160
 584 #define LOG_MINOR_VERSION 1
 585 
 586 void defaultStream::init() {
 587   _inited = true;
 588   if (LogVMOutput || LogCompilation) {
 589     init_log();
 590   }
 591 }
 592 
 593 bool defaultStream::has_log_file() {
 594   // lazily create log file (at startup, LogVMOutput is false even
 595   // if +LogVMOutput is used, because the flags haven't been parsed yet)
 596   // For safer printing during fatal error handling, do not init logfile
 597   // if a VM error has been reported.
 598   if (!_inited && !is_error_reported())  init();
 599   return _log_file != NULL;
 600 }
 601 
 602 fileStream* defaultStream::open_file(const char* log_name) {
 603   const char* try_name = make_log_name(log_name, NULL);
 604   if (try_name == NULL) {
 605     warning("Cannot open file %s: file name is too long.\n", log_name);
 606     return NULL;
 607   }
 608 
 609   fileStream* file = new(ResourceObj::C_HEAP, mtInternal) fileStream(try_name);
 610   FREE_C_HEAP_ARRAY(char, try_name);
 611   if (file->is_open()) {
 612     return file;
 613   }
 614 
 615   // Try again to open the file in the temp directory.
 616   delete file;
 617   char warnbuf[O_BUFLEN*2];
 618   jio_snprintf(warnbuf, sizeof(warnbuf), "Warning:  Cannot open log file: %s\n", log_name);
 619   // Note:  This feature is for maintainer use only.  No need for L10N.
 620   jio_print(warnbuf);
 621   try_name = make_log_name(log_name, os::get_temp_directory());
 622   if (try_name == NULL) {
 623     warning("Cannot open file %s: file name is too long for directory %s.\n", log_name, os::get_temp_directory());
 624     return NULL;
 625   }
 626 
 627   jio_snprintf(warnbuf, sizeof(warnbuf),
 628                "Warning:  Forcing option -XX:LogFile=%s\n", try_name);
 629   jio_print(warnbuf);
 630 
 631   file = new(ResourceObj::C_HEAP, mtInternal) fileStream(try_name);
 632   FREE_C_HEAP_ARRAY(char, try_name);
 633   if (file->is_open()) {
 634     return file;
 635   }
 636 
 637   delete file;
 638   return NULL;
 639 }
 640 
 641 void defaultStream::init_log() {
 642   // %%% Need a MutexLocker?
 643   const char* log_name = LogFile != NULL ? LogFile : "hotspot_%p.log";
 644   fileStream* file = open_file(log_name);
 645 
 646   if (file != NULL) {
 647     _log_file = file;
 648     _outer_xmlStream = new(ResourceObj::C_HEAP, mtInternal) xmlStream(file);
 649     start_log();
 650   } else {
 651     // and leave xtty as NULL
 652     LogVMOutput = false;
 653     DisplayVMOutput = true;
 654     LogCompilation = false;
 655   }
 656 }
 657 
 658 void defaultStream::start_log() {
 659   xmlStream*xs = _outer_xmlStream;
 660     if (this == tty)  xtty = xs;
 661     // Write XML header.
 662     xs->print_cr("<?xml version='1.0' encoding='UTF-8'?>");
 663     // (For now, don't bother to issue a DTD for this private format.)
 664     jlong time_ms = os::javaTimeMillis() - tty->time_stamp().milliseconds();
 665     // %%% Should be: jlong time_ms = os::start_time_milliseconds(), if
 666     // we ever get round to introduce that method on the os class
 667     xs->head("hotspot_log version='%d %d'"
 668              " process='%d' time_ms='" INT64_FORMAT "'",
 669              LOG_MAJOR_VERSION, LOG_MINOR_VERSION,
 670              os::current_process_id(), (int64_t)time_ms);
 671     // Write VM version header immediately.
 672     xs->head("vm_version");
 673     xs->head("name"); xs->text("%s", VM_Version::vm_name()); xs->cr();
 674     xs->tail("name");
 675     xs->head("release"); xs->text("%s", VM_Version::vm_release()); xs->cr();
 676     xs->tail("release");
 677     xs->head("info"); xs->text("%s", VM_Version::internal_vm_info_string()); xs->cr();
 678     xs->tail("info");
 679     xs->tail("vm_version");
 680     // Record information about the command-line invocation.
 681     xs->head("vm_arguments");  // Cf. Arguments::print_on()
 682     if (Arguments::num_jvm_flags() > 0) {
 683       xs->head("flags");
 684       Arguments::print_jvm_flags_on(xs->text());
 685       xs->tail("flags");
 686     }
 687     if (Arguments::num_jvm_args() > 0) {
 688       xs->head("args");
 689       Arguments::print_jvm_args_on(xs->text());
 690       xs->tail("args");
 691     }
 692     if (Arguments::java_command() != NULL) {
 693       xs->head("command"); xs->text()->print_cr("%s", Arguments::java_command());
 694       xs->tail("command");
 695     }
 696     if (Arguments::sun_java_launcher() != NULL) {
 697       xs->head("launcher"); xs->text()->print_cr("%s", Arguments::sun_java_launcher());
 698       xs->tail("launcher");
 699     }
 700     if (Arguments::system_properties() !=  NULL) {
 701       xs->head("properties");
 702       // Print it as a java-style property list.
 703       // System properties don't generally contain newlines, so don't bother with unparsing.
 704       outputStream *text = xs->text();
 705       for (SystemProperty* p = Arguments::system_properties(); p != NULL; p = p->next()) {
 706         assert(p->key() != NULL, "p->key() is NULL");
 707         if (p->is_readable()) {
 708           // Print in two stages to avoid problems with long
 709           // keys/values.

 710           text->print_raw(p->key());
 711           text->put('=');
 712           assert(p->value() != NULL, "p->value() is NULL");
 713           text->print_raw_cr(p->value());
 714         }
 715       }
 716       xs->tail("properties");
 717     }
 718     xs->tail("vm_arguments");
 719     // tty output per se is grouped under the <tty>...</tty> element.
 720     xs->head("tty");
 721     // All further non-markup text gets copied to the tty:
 722     xs->_text = this;  // requires friend declaration!
 723 }
 724 
 725 // finish_log() is called during normal VM shutdown. finish_log_on_error() is
 726 // called by ostream_abort() after a fatal error.
 727 //
 728 void defaultStream::finish_log() {
 729   xmlStream* xs = _outer_xmlStream;
 730   xs->done("tty");
 731 
 732   // Other log forks are appended here, at the End of Time:
 733   CompileLog::finish_log(xs->out());  // write compile logging, if any, now
 734 
 735   xs->done("hotspot_log");
 736   xs->flush();
 737 
 738   fileStream* file = _log_file;
 739   _log_file = NULL;
 740 
 741   delete _outer_xmlStream;
 742   _outer_xmlStream = NULL;
 743 
 744   file->flush();
 745   delete file;
 746 }
 747 
 748 void defaultStream::finish_log_on_error(char *buf, int buflen) {
 749   xmlStream* xs = _outer_xmlStream;
 750 
 751   if (xs && xs->out()) {
 752 
 753     xs->done_raw("tty");
 754 
 755     // Other log forks are appended here, at the End of Time:
 756     CompileLog::finish_log_on_error(xs->out(), buf, buflen);  // write compile logging, if any, now
 757 
 758     xs->done_raw("hotspot_log");
 759     xs->flush();
 760 
 761     fileStream* file = _log_file;
 762     _log_file = NULL;
 763     _outer_xmlStream = NULL;
 764 
 765     if (file) {
 766       file->flush();
 767 
 768       // Can't delete or close the file because delete and fclose aren't
 769       // async-safe. We are about to die, so leave it to the kernel.
 770       // delete file;
 771     }
 772   }
 773 }
 774 
 775 intx defaultStream::hold(intx writer_id) {
 776   bool has_log = has_log_file();  // check before locking
 777   if (// impossible, but who knows?
 778       writer_id == NO_WRITER ||
 779 
 780       // bootstrap problem
 781       tty_lock == NULL ||
 782 
 783       // can't grab a lock if current Thread isn't set
 784       Thread::current_or_null() == NULL ||
 785 
 786       // developer hook
 787       !SerializeVMOutput ||
 788 
 789       // VM already unhealthy
 790       is_error_reported() ||
 791 
 792       // safepoint == global lock (for VM only)
 793       (SafepointSynchronize::is_synchronizing() &&
 794        Thread::current()->is_VM_thread())
 795       ) {
 796     // do not attempt to lock unless we know the thread and the VM is healthy
 797     return NO_WRITER;
 798   }
 799   if (_writer == writer_id) {
 800     // already held, no need to re-grab the lock
 801     return NO_WRITER;
 802   }
 803   tty_lock->lock_without_safepoint_check();
 804   // got the lock
 805   if (writer_id != _last_writer) {
 806     if (has_log) {
 807       _log_file->bol();
 808       // output a hint where this output is coming from:
 809       _log_file->print_cr("<writer thread='" UINTX_FORMAT "'/>", writer_id);
 810     }
 811     _last_writer = writer_id;
 812   }
 813   _writer = writer_id;
 814   return writer_id;
 815 }
 816 
 817 void defaultStream::release(intx holder) {
 818   if (holder == NO_WRITER) {
 819     // nothing to release:  either a recursive lock, or we scribbled (too bad)
 820     return;
 821   }
 822   if (_writer != holder) {
 823     return;  // already unlocked, perhaps via break_tty_lock_for_safepoint
 824   }
 825   _writer = NO_WRITER;
 826   tty_lock->unlock();
 827 }
 828 
 829 
 830 // Yuck:  jio_print does not accept char*/len.
 831 static void call_jio_print(const char* s, size_t len) {
 832   char buffer[O_BUFLEN+100];
 833   if (len > sizeof(buffer)-1) {
 834     warning("increase O_BUFLEN in ostream.cpp -- output truncated");
 835     len = sizeof(buffer)-1;
 836   }
 837   strncpy(buffer, s, len);
 838   buffer[len] = '\0';
 839   jio_print(buffer);
 840 }
 841 
 842 
 843 void defaultStream::write(const char* s, size_t len) {
 844   intx thread_id = os::current_thread_id();
 845   intx holder = hold(thread_id);
 846 
 847   if (DisplayVMOutput &&
 848       (_outer_xmlStream == NULL || !_outer_xmlStream->inside_attrs())) {
 849     // print to output stream. It can be redirected by a vfprintf hook
 850     if (s[len] == '\0') {
 851       jio_print(s);
 852     } else {
 853       call_jio_print(s, len);
 854     }
 855   }
 856 
 857   // print to log file
 858   if (has_log_file()) {
 859     int nl0 = _newlines;
 860     xmlTextStream::write(s, len);
 861     // flush the log file too, if there were any newlines
 862     if (nl0 != _newlines){
 863       flush();
 864     }
 865   } else {
 866     update_position(s, len);
 867   }
 868 
 869   release(holder);
 870 }
 871 
 872 intx ttyLocker::hold_tty() {
 873   if (defaultStream::instance == NULL)  return defaultStream::NO_WRITER;
 874   intx thread_id = os::current_thread_id();
 875   return defaultStream::instance->hold(thread_id);
 876 }
 877 
 878 void ttyLocker::release_tty(intx holder) {
 879   if (holder == defaultStream::NO_WRITER)  return;
 880   defaultStream::instance->release(holder);
 881 }
 882 
 883 bool ttyLocker::release_tty_if_locked() {
 884   intx thread_id = os::current_thread_id();
 885   if (defaultStream::instance->writer() == thread_id) {
 886     // release the lock and return true so callers know if was
 887     // previously held.
 888     release_tty(thread_id);
 889     return true;
 890   }
 891   return false;
 892 }
 893 
 894 void ttyLocker::break_tty_lock_for_safepoint(intx holder) {
 895   if (defaultStream::instance != NULL &&
 896       defaultStream::instance->writer() == holder) {
 897     if (xtty != NULL) {
 898       xtty->print_cr("<!-- safepoint while printing -->");
 899     }
 900     defaultStream::instance->release(holder);
 901   }
 902   // (else there was no lock to break)
 903 }
 904 
 905 void ostream_init() {
 906   if (defaultStream::instance == NULL) {
 907     defaultStream::instance = new(ResourceObj::C_HEAP, mtInternal) defaultStream();
 908     tty = defaultStream::instance;
 909 
 910     // We want to ensure that time stamps in GC logs consider time 0
 911     // the time when the JVM is initialized, not the first time we ask
 912     // for a time stamp. So, here, we explicitly update the time stamp
 913     // of tty.
 914     tty->time_stamp().update_to(1);
 915   }
 916 }
 917 
 918 void ostream_init_log() {
 919   // Note : this must be called AFTER ostream_init()
 920 
 921 #if INCLUDE_CDS
 922   // For -XX:DumpLoadedClassList=<file> option
 923   if (DumpLoadedClassList != NULL) {
 924     const char* list_name = make_log_name(DumpLoadedClassList, NULL);
 925     classlist_file = new(ResourceObj::C_HEAP, mtInternal)
 926                          fileStream(list_name);
 927     FREE_C_HEAP_ARRAY(char, list_name);
 928   }
 929 #endif
 930 
 931   // If we haven't lazily initialized the logfile yet, do it now,
 932   // to avoid the possibility of lazy initialization during a VM
 933   // crash, which can affect the stability of the fatal error handler.
 934   defaultStream::instance->has_log_file();
 935 }
 936 
 937 // ostream_exit() is called during normal VM exit to finish log files, flush
 938 // output and free resource.
 939 void ostream_exit() {
 940   static bool ostream_exit_called = false;
 941   if (ostream_exit_called)  return;
 942   ostream_exit_called = true;
 943 #if INCLUDE_CDS
 944   if (classlist_file != NULL) {
 945     delete classlist_file;
 946   }
 947 #endif
 948   {
 949       // we temporaly disable PrintMallocFree here
 950       // as otherwise it'll lead to using of almost deleted
 951       // tty or defaultStream::instance in logging facility
 952       // of HeapFree(), see 6391258
 953       DEBUG_ONLY(FlagSetting fs(PrintMallocFree, false);)
 954       if (tty != defaultStream::instance) {
 955           delete tty;
 956       }
 957       if (defaultStream::instance != NULL) {
 958           delete defaultStream::instance;
 959       }
 960   }
 961   tty = NULL;
 962   xtty = NULL;
 963   defaultStream::instance = NULL;
 964 }
 965 
 966 // ostream_abort() is called by os::abort() when VM is about to die.
 967 void ostream_abort() {
 968   // Here we can't delete tty, just flush its output
 969   if (tty) tty->flush();
 970 
 971   if (defaultStream::instance != NULL) {
 972     static char buf[4096];
 973     defaultStream::instance->finish_log_on_error(buf, sizeof(buf));
 974   }
 975 }
 976 
 977 bufferedStream::bufferedStream(size_t initial_size, size_t bufmax) : outputStream() {
 978   buffer_length = initial_size;
 979   buffer        = NEW_C_HEAP_ARRAY(char, buffer_length, mtInternal);
 980   buffer_pos    = 0;
 981   buffer_fixed  = false;
 982   buffer_max    = bufmax;
 983 }
 984 
 985 bufferedStream::bufferedStream(char* fixed_buffer, size_t fixed_buffer_size, size_t bufmax) : outputStream() {
 986   buffer_length = fixed_buffer_size;
 987   buffer        = fixed_buffer;
 988   buffer_pos    = 0;
 989   buffer_fixed  = true;
 990   buffer_max    = bufmax;
 991 }
 992 
 993 void bufferedStream::write(const char* s, size_t len) {
 994 
 995   if(buffer_pos + len > buffer_max) {
 996     flush();
 997   }
 998 
 999   size_t end = buffer_pos + len;
1000   if (end >= buffer_length) {
1001     if (buffer_fixed) {
1002       // if buffer cannot resize, silently truncate
1003       len = buffer_length - buffer_pos - 1;
1004     } else {
1005       // For small overruns, double the buffer.  For larger ones,
1006       // increase to the requested size.
1007       if (end < buffer_length * 2) {
1008         end = buffer_length * 2;
1009       }
1010       buffer = REALLOC_C_HEAP_ARRAY(char, buffer, end, mtInternal);
1011       buffer_length = end;
1012     }
1013   }
1014   memcpy(buffer + buffer_pos, s, len);
1015   buffer_pos += len;
1016   update_position(s, len);
1017 }
1018 
1019 char* bufferedStream::as_string() {
1020   char* copy = NEW_RESOURCE_ARRAY(char, buffer_pos+1);
1021   strncpy(copy, buffer, buffer_pos);
1022   copy[buffer_pos] = 0;  // terminating null
1023   return copy;
1024 }
1025 
1026 bufferedStream::~bufferedStream() {
1027   if (!buffer_fixed) {
1028     FREE_C_HEAP_ARRAY(char, buffer);
1029   }
1030 }
1031 
1032 #ifndef PRODUCT
1033 
1034 #if defined(SOLARIS) || defined(LINUX) || defined(AIX) || defined(_ALLBSD_SOURCE)
1035 #include <sys/types.h>
1036 #include <sys/socket.h>
1037 #include <netinet/in.h>
1038 #include <arpa/inet.h>
1039 #endif
1040 
1041 // Network access
1042 networkStream::networkStream() : bufferedStream(1024*10, 1024*10) {
1043 
1044   _socket = -1;
1045 
1046   int result = os::socket(AF_INET, SOCK_STREAM, 0);
1047   if (result <= 0) {
1048     assert(false, "Socket could not be created!");
1049   } else {
1050     _socket = result;
1051   }
1052 }
1053 
1054 int networkStream::read(char *buf, size_t len) {
1055   return os::recv(_socket, buf, (int)len, 0);
1056 }
1057 
1058 void networkStream::flush() {
1059   if (size() != 0) {
1060     int result = os::raw_send(_socket, (char *)base(), size(), 0);
1061     assert(result != -1, "connection error");
1062     assert(result == (int)size(), "didn't send enough data");
1063   }
1064   reset();
1065 }
1066 
1067 networkStream::~networkStream() {
1068   close();
1069 }
1070 
1071 void networkStream::close() {
1072   if (_socket != -1) {
1073     flush();
1074     os::socket_close(_socket);
1075     _socket = -1;
1076   }
1077 }
1078 
1079 bool networkStream::connect(const char *ip, short port) {
1080 
1081   struct sockaddr_in server;
1082   server.sin_family = AF_INET;
1083   server.sin_port = htons(port);
1084 
1085   server.sin_addr.s_addr = inet_addr(ip);
1086   if (server.sin_addr.s_addr == (uint32_t)-1) {
1087     struct hostent* host = os::get_host_by_name((char*)ip);
1088     if (host != NULL) {
1089       memcpy(&server.sin_addr, host->h_addr_list[0], host->h_length);
1090     } else {
1091       return false;
1092     }
1093   }
1094 
1095 
1096   int result = os::connect(_socket, (struct sockaddr*)&server, sizeof(struct sockaddr_in));
1097   return (result >= 0);
1098 }
1099 
1100 #endif
--- EOF ---