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         // Print in two stages to avoid problems with long
 707         // keys/values.
 708         assert(p->key() != NULL, "p->key() is NULL");
 709         text->print_raw(p->key());
 710         text->put('=');
 711         assert(p->value() != NULL, "p->value() is NULL");
 712         text->print_raw_cr(p->value());

 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       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   {
 947       // we temporaly disable PrintMallocFree here
 948       // as otherwise it'll lead to using of almost deleted
 949       // tty or defaultStream::instance in logging facility
 950       // of HeapFree(), see 6391258
 951       DEBUG_ONLY(FlagSetting fs(PrintMallocFree, false);)
 952       if (tty != defaultStream::instance) {
 953           delete tty;
 954       }
 955       if (defaultStream::instance != NULL) {
 956           delete defaultStream::instance;
 957       }
 958   }
 959   tty = NULL;
 960   xtty = NULL;
 961   defaultStream::instance = NULL;
 962 }
 963 
 964 // ostream_abort() is called by os::abort() when VM is about to die.
 965 void ostream_abort() {
 966   // Here we can't delete tty, just flush its output
 967   if (tty) tty->flush();
 968 
 969   if (defaultStream::instance != NULL) {
 970     static char buf[4096];
 971     defaultStream::instance->finish_log_on_error(buf, sizeof(buf));
 972   }
 973 }
 974 
 975 bufferedStream::bufferedStream(size_t initial_size, size_t bufmax) : outputStream() {
 976   buffer_length = initial_size;
 977   buffer        = NEW_C_HEAP_ARRAY(char, buffer_length, mtInternal);
 978   buffer_pos    = 0;
 979   buffer_fixed  = false;
 980   buffer_max    = bufmax;
 981 }
 982 
 983 bufferedStream::bufferedStream(char* fixed_buffer, size_t fixed_buffer_size, size_t bufmax) : outputStream() {
 984   buffer_length = fixed_buffer_size;
 985   buffer        = fixed_buffer;
 986   buffer_pos    = 0;
 987   buffer_fixed  = true;
 988   buffer_max    = bufmax;
 989 }
 990 
 991 void bufferedStream::write(const char* s, size_t len) {
 992 
 993   if(buffer_pos + len > buffer_max) {
 994     flush();
 995   }
 996 
 997   size_t end = buffer_pos + len;
 998   if (end >= buffer_length) {
 999     if (buffer_fixed) {
1000       // if buffer cannot resize, silently truncate
1001       len = buffer_length - buffer_pos - 1;
1002     } else {
1003       // For small overruns, double the buffer.  For larger ones,
1004       // increase to the requested size.
1005       if (end < buffer_length * 2) {
1006         end = buffer_length * 2;
1007       }
1008       buffer = REALLOC_C_HEAP_ARRAY(char, buffer, end, mtInternal);
1009       buffer_length = end;
1010     }
1011   }
1012   memcpy(buffer + buffer_pos, s, len);
1013   buffer_pos += len;
1014   update_position(s, len);
1015 }
1016 
1017 char* bufferedStream::as_string() {
1018   char* copy = NEW_RESOURCE_ARRAY(char, buffer_pos+1);
1019   strncpy(copy, buffer, buffer_pos);
1020   copy[buffer_pos] = 0;  // terminating null
1021   return copy;
1022 }
1023 
1024 bufferedStream::~bufferedStream() {
1025   if (!buffer_fixed) {
1026     FREE_C_HEAP_ARRAY(char, buffer);
1027   }
1028 }
1029 
1030 #ifndef PRODUCT
1031 
1032 #if defined(SOLARIS) || defined(LINUX) || defined(AIX) || defined(_ALLBSD_SOURCE)
1033 #include <sys/types.h>
1034 #include <sys/socket.h>
1035 #include <netinet/in.h>
1036 #include <arpa/inet.h>
1037 #endif
1038 
1039 // Network access
1040 networkStream::networkStream() : bufferedStream(1024*10, 1024*10) {
1041 
1042   _socket = -1;
1043 
1044   int result = os::socket(AF_INET, SOCK_STREAM, 0);
1045   if (result <= 0) {
1046     assert(false, "Socket could not be created!");
1047   } else {
1048     _socket = result;
1049   }
1050 }
1051 
1052 int networkStream::read(char *buf, size_t len) {
1053   return os::recv(_socket, buf, (int)len, 0);
1054 }
1055 
1056 void networkStream::flush() {
1057   if (size() != 0) {
1058     int result = os::raw_send(_socket, (char *)base(), size(), 0);
1059     assert(result != -1, "connection error");
1060     assert(result == (int)size(), "didn't send enough data");
1061   }
1062   reset();
1063 }
1064 
1065 networkStream::~networkStream() {
1066   close();
1067 }
1068 
1069 void networkStream::close() {
1070   if (_socket != -1) {
1071     flush();
1072     os::socket_close(_socket);
1073     _socket = -1;
1074   }
1075 }
1076 
1077 bool networkStream::connect(const char *ip, short port) {
1078 
1079   struct sockaddr_in server;
1080   server.sin_family = AF_INET;
1081   server.sin_port = htons(port);
1082 
1083   server.sin_addr.s_addr = inet_addr(ip);
1084   if (server.sin_addr.s_addr == (uint32_t)-1) {
1085     struct hostent* host = os::get_host_by_name((char*)ip);
1086     if (host != NULL) {
1087       memcpy(&server.sin_addr, host->h_addr_list[0], host->h_length);
1088     } else {
1089       return false;
1090     }
1091   }
1092 
1093 
1094   int result = os::connect(_socket, (struct sockaddr*)&server, sizeof(struct sockaddr_in));
1095   return (result >= 0);
1096 }
1097 
1098 #endif
--- EOF ---