1 /*
   2  * Copyright (c) 1997, 2011, 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 "utilities/defaultStream.hpp"
  30 #include "utilities/ostream.hpp"
  31 #include "utilities/top.hpp"
  32 #include "utilities/xmlstream.hpp"
  33 #ifdef TARGET_OS_FAMILY_linux
  34 # include "os_linux.inline.hpp"
  35 #endif
  36 #ifdef TARGET_OS_FAMILY_solaris
  37 # include "os_solaris.inline.hpp"
  38 #endif
  39 #ifdef TARGET_OS_FAMILY_windows
  40 # include "os_windows.inline.hpp"
  41 #endif
  42 #ifdef TARGET_OS_FAMILY_bsd
  43 # include "os_bsd.inline.hpp"
  44 #endif
  45 
  46 extern "C" void jio_print(const char* s); // Declarationtion of jvm method
  47 
  48 outputStream::outputStream(int width) {
  49   _width       = width;
  50   _position    = 0;
  51   _newlines    = 0;
  52   _precount    = 0;
  53   _indentation = 0;
  54 }
  55 
  56 outputStream::outputStream(int width, bool has_time_stamps) {
  57   _width       = width;
  58   _position    = 0;
  59   _newlines    = 0;
  60   _precount    = 0;
  61   _indentation = 0;
  62   if (has_time_stamps)  _stamp.update();
  63 }
  64 
  65 void outputStream::update_position(const char* s, size_t len) {
  66   for (size_t i = 0; i < len; i++) {
  67     char ch = s[i];
  68     if (ch == '\n') {
  69       _newlines += 1;
  70       _precount += _position + 1;
  71       _position = 0;
  72     } else if (ch == '\t') {
  73       int tw = 8 - (_position & 7);
  74       _position += tw;
  75       _precount -= tw-1;  // invariant:  _precount + _position == total count
  76     } else {
  77       _position += 1;
  78     }
  79   }
  80 }
  81 
  82 // Execute a vsprintf, using the given buffer if necessary.
  83 // Return a pointer to the formatted string.
  84 const char* outputStream::do_vsnprintf(char* buffer, size_t buflen,
  85                                        const char* format, va_list ap,
  86                                        bool add_cr,
  87                                        size_t& result_len) {
  88   const char* result;
  89   if (add_cr)  buflen--;
  90   if (!strchr(format, '%')) {
  91     // constant format string
  92     result = format;
  93     result_len = strlen(result);
  94     if (add_cr && result_len >= buflen)  result_len = buflen-1;  // truncate
  95   } else if (format[0] == '%' && format[1] == 's' && format[2] == '\0') {
  96     // trivial copy-through format string
  97     result = va_arg(ap, const char*);
  98     result_len = strlen(result);
  99     if (add_cr && result_len >= buflen)  result_len = buflen-1;  // truncate
 100   } else if (vsnprintf(buffer, buflen, format, ap) >= 0) {
 101     result = buffer;
 102     result_len = strlen(result);
 103   } else {
 104     DEBUG_ONLY(warning("increase O_BUFLEN in ostream.hpp -- output truncated");)
 105     result = buffer;
 106     result_len = buflen - 1;
 107     buffer[result_len] = 0;
 108   }
 109   if (add_cr) {
 110     if (result != buffer) {
 111       strncpy(buffer, result, buflen);
 112       result = buffer;
 113     }
 114     buffer[result_len++] = '\n';
 115     buffer[result_len] = 0;
 116   }
 117   return result;
 118 }
 119 
 120 void outputStream::print(const char* format, ...) {
 121   char buffer[O_BUFLEN];
 122   va_list ap;
 123   va_start(ap, format);
 124   size_t len;
 125   const char* str = do_vsnprintf(buffer, O_BUFLEN, format, ap, false, len);
 126   write(str, len);
 127   va_end(ap);
 128 }
 129 
 130 void outputStream::print_cr(const char* format, ...) {
 131   char buffer[O_BUFLEN];
 132   va_list ap;
 133   va_start(ap, format);
 134   size_t len;
 135   const char* str = do_vsnprintf(buffer, O_BUFLEN, format, ap, true, len);
 136   write(str, len);
 137   va_end(ap);
 138 }
 139 
 140 void outputStream::vprint(const char *format, va_list argptr) {
 141   char buffer[O_BUFLEN];
 142   size_t len;
 143   const char* str = do_vsnprintf(buffer, O_BUFLEN, format, argptr, false, len);
 144   write(str, len);
 145 }
 146 
 147 void outputStream::vprint_cr(const char* format, va_list argptr) {
 148   char buffer[O_BUFLEN];
 149   size_t len;
 150   const char* str = do_vsnprintf(buffer, O_BUFLEN, format, argptr, true, len);
 151   write(str, len);
 152 }
 153 
 154 void outputStream::fill_to(int col) {
 155   int need_fill = col - position();
 156   sp(need_fill);
 157 }
 158 
 159 void outputStream::move_to(int col, int slop, int min_space) {
 160   if (position() >= col + slop)
 161     cr();
 162   int need_fill = col - position();
 163   if (need_fill < min_space)
 164     need_fill = min_space;
 165   sp(need_fill);
 166 }
 167 
 168 void outputStream::put(char ch) {
 169   assert(ch != 0, "please fix call site");
 170   char buf[] = { ch, '\0' };
 171   write(buf, 1);
 172 }
 173 
 174 #define SP_USE_TABS false
 175 
 176 void outputStream::sp(int count) {
 177   if (count < 0)  return;
 178   if (SP_USE_TABS && count >= 8) {
 179     int target = position() + count;
 180     while (count >= 8) {
 181       this->write("\t", 1);
 182       count -= 8;
 183     }
 184     count = target - position();
 185   }
 186   while (count > 0) {
 187     int nw = (count > 8) ? 8 : count;
 188     this->write("        ", nw);
 189     count -= nw;
 190   }
 191 }
 192 
 193 void outputStream::cr() {
 194   this->write("\n", 1);
 195 }
 196 
 197 void outputStream::stamp() {
 198   if (! _stamp.is_updated()) {
 199     _stamp.update(); // start at 0 on first call to stamp()
 200   }
 201 
 202   // outputStream::stamp() may get called by ostream_abort(), use snprintf
 203   // to avoid allocating large stack buffer in print().
 204   char buf[40];
 205   jio_snprintf(buf, sizeof(buf), "%.3f", _stamp.seconds());
 206   print_raw(buf);
 207 }
 208 
 209 void outputStream::stamp(bool guard,
 210                          const char* prefix,
 211                          const char* suffix) {
 212   if (!guard) {
 213     return;
 214   }
 215   print_raw(prefix);
 216   stamp();
 217   print_raw(suffix);
 218 }
 219 
 220 void outputStream::date_stamp(bool guard,
 221                               const char* prefix,
 222                               const char* suffix) {
 223   if (!guard) {
 224     return;
 225   }
 226   print_raw(prefix);
 227   static const char error_time[] = "yyyy-mm-ddThh:mm:ss.mmm+zzzz";
 228   static const int buffer_length = 32;
 229   char buffer[buffer_length];
 230   const char* iso8601_result = os::iso8601_time(buffer, buffer_length);
 231   if (iso8601_result != NULL) {
 232     print_raw(buffer);
 233   } else {
 234     print_raw(error_time);
 235   }
 236   print_raw(suffix);
 237   return;
 238 }
 239 
 240 void outputStream::indent() {
 241   while (_position < _indentation) sp();
 242 }
 243 
 244 void outputStream::print_jlong(jlong value) {
 245   // N.B. Same as INT64_FORMAT
 246   print(os::jlong_format_specifier(), value);
 247 }
 248 
 249 void outputStream::print_julong(julong value) {
 250   // N.B. Same as UINT64_FORMAT
 251   print(os::julong_format_specifier(), value);
 252 }
 253 
 254 stringStream::stringStream(size_t initial_size) : outputStream() {
 255   buffer_length = initial_size;
 256   buffer        = NEW_RESOURCE_ARRAY(char, buffer_length);
 257   buffer_pos    = 0;
 258   buffer_fixed  = false;
 259 }
 260 
 261 // useful for output to fixed chunks of memory, such as performance counters
 262 stringStream::stringStream(char* fixed_buffer, size_t fixed_buffer_size) : outputStream() {
 263   buffer_length = fixed_buffer_size;
 264   buffer        = fixed_buffer;
 265   buffer_pos    = 0;
 266   buffer_fixed  = true;
 267 }
 268 
 269 void stringStream::write(const char* s, size_t len) {
 270   size_t write_len = len;               // number of non-null bytes to write
 271   size_t end = buffer_pos + len + 1;    // position after write and final '\0'
 272   if (end > buffer_length) {
 273     if (buffer_fixed) {
 274       // if buffer cannot resize, silently truncate
 275       end = buffer_length;
 276       write_len = end - buffer_pos - 1; // leave room for the final '\0'
 277     } else {
 278       // For small overruns, double the buffer.  For larger ones,
 279       // increase to the requested size.
 280       if (end < buffer_length * 2) {
 281         end = buffer_length * 2;
 282       }
 283       char* oldbuf = buffer;
 284       buffer = NEW_RESOURCE_ARRAY(char, end);
 285       strncpy(buffer, oldbuf, buffer_pos);
 286       buffer_length = end;
 287     }
 288   }
 289   // invariant: buffer is always null-terminated
 290   guarantee(buffer_pos + write_len + 1 <= buffer_length, "stringStream oob");
 291   buffer[buffer_pos + write_len] = 0;
 292   strncpy(buffer + buffer_pos, s, write_len);
 293   buffer_pos += write_len;
 294 
 295   // Note that the following does not depend on write_len.
 296   // This means that position and count get updated
 297   // even when overflow occurs.
 298   update_position(s, len);
 299 }
 300 
 301 char* stringStream::as_string() {
 302   char* copy = NEW_RESOURCE_ARRAY(char, buffer_pos+1);
 303   strncpy(copy, buffer, buffer_pos);
 304   copy[buffer_pos] = 0;  // terminating null
 305   return copy;
 306 }
 307 
 308 stringStream::~stringStream() {}
 309 
 310 xmlStream*   xtty;
 311 outputStream* tty;
 312 outputStream* gclog_or_tty;
 313 extern Mutex* tty_lock;
 314 
 315 fileStream::fileStream(const char* file_name) {
 316   _file = fopen(file_name, "w");
 317   _need_close = true;
 318 }
 319 
 320 fileStream::fileStream(const char* file_name, const char* opentype) {
 321   _file = fopen(file_name, opentype);
 322   _need_close = true;
 323 }
 324 
 325 void fileStream::write(const char* s, size_t len) {
 326   if (_file != NULL)  {
 327     // Make an unused local variable to avoid warning from gcc 4.x compiler.
 328     size_t count = fwrite(s, 1, len, _file);
 329   }
 330   update_position(s, len);
 331 }
 332 
 333 long fileStream::fileSize() {
 334   long size = -1;
 335   if (_file != NULL) {
 336     long pos  = ::ftell(_file);
 337     if (::fseek(_file, 0, SEEK_END) == 0) {
 338       size = ::ftell(_file);
 339     }
 340     ::fseek(_file, pos, SEEK_SET);
 341   }
 342   return size;
 343 }
 344 
 345 char* fileStream::readln(char *data, int count ) {
 346   char * ret = ::fgets(data, count, _file);
 347   //Get rid of annoying \n char
 348   data[::strlen(data)-1] = '\0';
 349   return ret;
 350 }
 351 
 352 fileStream::~fileStream() {
 353   if (_file != NULL) {
 354     if (_need_close) fclose(_file);
 355     _file      = NULL;
 356   }
 357 }
 358 
 359 void fileStream::flush() {
 360   fflush(_file);
 361 }
 362 
 363 fdStream::fdStream(const char* file_name) {
 364   _fd = open(file_name, O_WRONLY | O_CREAT | O_TRUNC, 0666);
 365   _need_close = true;
 366 }
 367 
 368 fdStream::~fdStream() {
 369   if (_fd != -1) {
 370     if (_need_close) close(_fd);
 371     _fd = -1;
 372   }
 373 }
 374 
 375 void fdStream::write(const char* s, size_t len) {
 376   if (_fd != -1) {
 377     // Make an unused local variable to avoid warning from gcc 4.x compiler.
 378     size_t count = ::write(_fd, s, (int)len);
 379   }
 380   update_position(s, len);
 381 }
 382 
 383 rotatingFileStream::~rotatingFileStream() {
 384   if (_file != NULL) {
 385     if (_need_close) fclose(_file);
 386     _file      = NULL;
 387     FREE_C_HEAP_ARRAY(char, _file_name);
 388     _file_name = NULL;
 389   }
 390 }
 391 
 392 rotatingFileStream::rotatingFileStream(const char* file_name) {
 393   _cur_file_num = 0;
 394   _bytes_writen = 0L;
 395   _file_name = NEW_C_HEAP_ARRAY(char, strlen(file_name)+10);
 396   jio_snprintf(_file_name, strlen(file_name)+10, "%s.%d", file_name, _cur_file_num);
 397   _file = fopen(_file_name, "w");
 398   _need_close = true;
 399 }
 400 
 401 rotatingFileStream::rotatingFileStream(const char* file_name, const char* opentype) {
 402   _cur_file_num = 0;
 403   _bytes_writen = 0L;
 404   _file_name = NEW_C_HEAP_ARRAY(char, strlen(file_name)+10);
 405   jio_snprintf(_file_name, strlen(file_name)+10, "%s.%d", file_name, _cur_file_num);
 406   _file = fopen(_file_name, opentype);
 407   _need_close = true;
 408 }
 409 
 410 void rotatingFileStream::write(const char* s, size_t len) {
 411   if (_file != NULL)  {
 412     // Make an unused local variable to avoid warning from gcc 4.x compiler.
 413     size_t count = fwrite(s, 1, len, _file);
 414     Atomic::add((jlong)count, &_bytes_writen);
 415   }
 416   update_position(s, len);
 417 }
 418 
 419 // rotate_log must be called from VMThread at safepoint. In case need change parameters
 420 // for gc log rotation from thread other than VMThread, a sub type of VM_Operation
 421 // should be created and be submitted to VMThread's operation queue. DO NOT call this
 422 // function directly. Currently, it is safe to rotate log at safepoint through VMThread.
 423 // That is, no mutator threads and concurrent GC threads run parallel with VMThread to
 424 // write to gc log file at safepoint. If in future, changes made for mutator threads or
 425 // concurrent GC threads to run parallel with VMThread at safepoint, write and rotate_log
 426 // must be synchronized.
 427 void rotatingFileStream::rotate_log() {
 428   if (_bytes_writen < (jlong)GCLogFileSize) return;
 429 #ifdef ASSERT
 430   Thread *thread = Thread::current();
 431   assert(thread == NULL ||
 432          (thread->is_VM_thread() && SafepointSynchronize::is_at_safepoint()),
 433          "Must be VMThread at safepoint");
 434 #endif
 435   if (NumberOfGCLogFiles == 1) {
 436     // rotate in same file
 437     rewind();
 438     _bytes_writen = 0L;
 439     return;
 440   }
 441 
 442   // rotate file in names file.0, file.1, file.2, ..., file.<MaxGCLogFileNumbers-1>
 443   // close current file, rotate to next file
 444   if (_file != NULL) {
 445     _cur_file_num ++;
 446     if (_cur_file_num >= NumberOfGCLogFiles) _cur_file_num = 0;
 447     jio_snprintf(_file_name, strlen(Arguments::gc_log_filename()) + 10, "%s.%d",
 448              Arguments::gc_log_filename(), _cur_file_num);
 449     fclose(_file);
 450     _file = NULL;
 451   }
 452   _file = fopen(_file_name, "w");
 453   if (_file != NULL) {
 454     _bytes_writen = 0L;
 455     _need_close = true;
 456   } else {
 457     tty->print_cr("failed to open rotation log file %s due to %s\n",
 458                   _file_name, strerror(errno));
 459     _need_close = false;
 460   }
 461 }
 462 
 463 defaultStream* defaultStream::instance = NULL;
 464 int defaultStream::_output_fd = 1;
 465 int defaultStream::_error_fd  = 2;
 466 FILE* defaultStream::_output_stream = stdout;
 467 FILE* defaultStream::_error_stream  = stderr;
 468 
 469 #define LOG_MAJOR_VERSION 160
 470 #define LOG_MINOR_VERSION 1
 471 
 472 void defaultStream::init() {
 473   _inited = true;
 474   if (LogVMOutput || LogCompilation) {
 475     init_log();
 476   }
 477 }
 478 
 479 bool defaultStream::has_log_file() {
 480   // lazily create log file (at startup, LogVMOutput is false even
 481   // if +LogVMOutput is used, because the flags haven't been parsed yet)
 482   // For safer printing during fatal error handling, do not init logfile
 483   // if a VM error has been reported.
 484   if (!_inited && !is_error_reported())  init();
 485   return _log_file != NULL;
 486 }
 487 
 488 static const char* make_log_name(const char* log_name, const char* force_directory) {
 489   const char* basename = log_name;
 490   char file_sep = os::file_separator()[0];
 491   const char* cp;
 492   for (cp = log_name; *cp != '\0'; cp++) {
 493     if (*cp == '/' || *cp == file_sep) {
 494       basename = cp+1;
 495     }
 496   }
 497   const char* nametail = log_name;
 498 
 499   // Compute buffer length
 500   size_t buffer_length;
 501   if (force_directory != NULL) {
 502     buffer_length = strlen(force_directory) + strlen(os::file_separator()) +
 503                     strlen(basename) + 1;
 504   } else {
 505     buffer_length = strlen(log_name) + 1;
 506   }
 507 
 508   const char* star = strchr(basename, '*');
 509   int star_pos = (star == NULL) ? -1 : (star - nametail);
 510   int skip = 1;
 511   if (star == NULL) {
 512     // Try %p
 513     star = strstr(basename, "%p");
 514     if (star != NULL) {
 515       skip = 2;
 516     }
 517   }
 518   star_pos = (star == NULL) ? -1 : (star - nametail);
 519 
 520   char pid[32];
 521   if (star_pos >= 0) {
 522     jio_snprintf(pid, sizeof(pid), "%u", os::current_process_id());
 523     buffer_length += strlen(pid);
 524   }
 525 
 526   // Create big enough buffer.
 527   char *buf = NEW_C_HEAP_ARRAY(char, buffer_length);
 528 
 529   strcpy(buf, "");
 530   if (force_directory != NULL) {
 531     strcat(buf, force_directory);
 532     strcat(buf, os::file_separator());
 533     nametail = basename;       // completely skip directory prefix
 534   }
 535 
 536   if (star_pos >= 0) {
 537     // convert foo*bar.log or foo%pbar.log to foo123bar.log
 538     int buf_pos = (int) strlen(buf);
 539     strncpy(&buf[buf_pos], nametail, star_pos);
 540     strcpy(&buf[buf_pos + star_pos], pid);
 541     nametail += star_pos + skip;  // skip prefix and pid format
 542   }
 543 
 544   strcat(buf, nametail);      // append rest of name, or all of name
 545   return buf;
 546 }
 547 
 548 void defaultStream::init_log() {
 549   // %%% Need a MutexLocker?
 550   const char* log_name = LogFile != NULL ? LogFile : "hotspot.log";
 551   const char* try_name = make_log_name(log_name, NULL);
 552   fileStream* file = new(ResourceObj::C_HEAP) fileStream(try_name);
 553   if (!file->is_open()) {
 554     // Try again to open the file.
 555     char warnbuf[O_BUFLEN*2];
 556     jio_snprintf(warnbuf, sizeof(warnbuf),
 557                  "Warning:  Cannot open log file: %s\n", try_name);
 558     // Note:  This feature is for maintainer use only.  No need for L10N.
 559     jio_print(warnbuf);
 560     FREE_C_HEAP_ARRAY(char, try_name);
 561     try_name = make_log_name("hs_pid%p.log", os::get_temp_directory());
 562     jio_snprintf(warnbuf, sizeof(warnbuf),
 563                  "Warning:  Forcing option -XX:LogFile=%s\n", try_name);
 564     jio_print(warnbuf);
 565     delete file;
 566     file = new(ResourceObj::C_HEAP) fileStream(try_name);
 567     FREE_C_HEAP_ARRAY(char, try_name);
 568   }
 569   if (file->is_open()) {
 570     _log_file = file;
 571     xmlStream* xs = new(ResourceObj::C_HEAP) xmlStream(file);
 572     _outer_xmlStream = xs;
 573     if (this == tty)  xtty = xs;
 574     // Write XML header.
 575     xs->print_cr("<?xml version='1.0' encoding='UTF-8'?>");
 576     // (For now, don't bother to issue a DTD for this private format.)
 577     jlong time_ms = os::javaTimeMillis() - tty->time_stamp().milliseconds();
 578     // %%% Should be: jlong time_ms = os::start_time_milliseconds(), if
 579     // we ever get round to introduce that method on the os class
 580     xs->head("hotspot_log version='%d %d'"
 581              " process='%d' time_ms='"INT64_FORMAT"'",
 582              LOG_MAJOR_VERSION, LOG_MINOR_VERSION,
 583              os::current_process_id(), time_ms);
 584     // Write VM version header immediately.
 585     xs->head("vm_version");
 586     xs->head("name"); xs->text("%s", VM_Version::vm_name()); xs->cr();
 587     xs->tail("name");
 588     xs->head("release"); xs->text("%s", VM_Version::vm_release()); xs->cr();
 589     xs->tail("release");
 590     xs->head("info"); xs->text("%s", VM_Version::internal_vm_info_string()); xs->cr();
 591     xs->tail("info");
 592     xs->tail("vm_version");
 593     // Record information about the command-line invocation.
 594     xs->head("vm_arguments");  // Cf. Arguments::print_on()
 595     if (Arguments::num_jvm_flags() > 0) {
 596       xs->head("flags");
 597       Arguments::print_jvm_flags_on(xs->text());
 598       xs->tail("flags");
 599     }
 600     if (Arguments::num_jvm_args() > 0) {
 601       xs->head("args");
 602       Arguments::print_jvm_args_on(xs->text());
 603       xs->tail("args");
 604     }
 605     if (Arguments::java_command() != NULL) {
 606       xs->head("command"); xs->text()->print_cr("%s", Arguments::java_command());
 607       xs->tail("command");
 608     }
 609     if (Arguments::sun_java_launcher() != NULL) {
 610       xs->head("launcher"); xs->text()->print_cr("%s", Arguments::sun_java_launcher());
 611       xs->tail("launcher");
 612     }
 613     if (Arguments::system_properties() !=  NULL) {
 614       xs->head("properties");
 615       // Print it as a java-style property list.
 616       // System properties don't generally contain newlines, so don't bother with unparsing.
 617       for (SystemProperty* p = Arguments::system_properties(); p != NULL; p = p->next()) {
 618         xs->text()->print_cr("%s=%s", p->key(), p->value());
 619       }
 620       xs->tail("properties");
 621     }
 622     xs->tail("vm_arguments");
 623     // tty output per se is grouped under the <tty>...</tty> element.
 624     xs->head("tty");
 625     // All further non-markup text gets copied to the tty:
 626     xs->_text = this;  // requires friend declaration!
 627   } else {
 628     delete(file);
 629     // and leave xtty as NULL
 630     LogVMOutput = false;
 631     DisplayVMOutput = true;
 632     LogCompilation = false;
 633   }
 634 }
 635 
 636 // finish_log() is called during normal VM shutdown. finish_log_on_error() is
 637 // called by ostream_abort() after a fatal error.
 638 //
 639 void defaultStream::finish_log() {
 640   xmlStream* xs = _outer_xmlStream;
 641   xs->done("tty");
 642 
 643   // Other log forks are appended here, at the End of Time:
 644   CompileLog::finish_log(xs->out());  // write compile logging, if any, now
 645 
 646   xs->done("hotspot_log");
 647   xs->flush();
 648 
 649   fileStream* file = _log_file;
 650   _log_file = NULL;
 651 
 652   delete _outer_xmlStream;
 653   _outer_xmlStream = NULL;
 654 
 655   file->flush();
 656   delete file;
 657 }
 658 
 659 void defaultStream::finish_log_on_error(char *buf, int buflen) {
 660   xmlStream* xs = _outer_xmlStream;
 661 
 662   if (xs && xs->out()) {
 663 
 664     xs->done_raw("tty");
 665 
 666     // Other log forks are appended here, at the End of Time:
 667     CompileLog::finish_log_on_error(xs->out(), buf, buflen);  // write compile logging, if any, now
 668 
 669     xs->done_raw("hotspot_log");
 670     xs->flush();
 671 
 672     fileStream* file = _log_file;
 673     _log_file = NULL;
 674     _outer_xmlStream = NULL;
 675 
 676     if (file) {
 677       file->flush();
 678 
 679       // Can't delete or close the file because delete and fclose aren't
 680       // async-safe. We are about to die, so leave it to the kernel.
 681       // delete file;
 682     }
 683   }
 684 }
 685 
 686 intx defaultStream::hold(intx writer_id) {
 687   bool has_log = has_log_file();  // check before locking
 688   if (// impossible, but who knows?
 689       writer_id == NO_WRITER ||
 690 
 691       // bootstrap problem
 692       tty_lock == NULL ||
 693 
 694       // can't grab a lock or call Thread::current() if TLS isn't initialized
 695       ThreadLocalStorage::thread() == NULL ||
 696 
 697       // developer hook
 698       !SerializeVMOutput ||
 699 
 700       // VM already unhealthy
 701       is_error_reported() ||
 702 
 703       // safepoint == global lock (for VM only)
 704       (SafepointSynchronize::is_synchronizing() &&
 705        Thread::current()->is_VM_thread())
 706       ) {
 707     // do not attempt to lock unless we know the thread and the VM is healthy
 708     return NO_WRITER;
 709   }
 710   if (_writer == writer_id) {
 711     // already held, no need to re-grab the lock
 712     return NO_WRITER;
 713   }
 714   tty_lock->lock_without_safepoint_check();
 715   // got the lock
 716   if (writer_id != _last_writer) {
 717     if (has_log) {
 718       _log_file->bol();
 719       // output a hint where this output is coming from:
 720       _log_file->print_cr("<writer thread='"INTX_FORMAT"'/>", writer_id);
 721     }
 722     _last_writer = writer_id;
 723   }
 724   _writer = writer_id;
 725   return writer_id;
 726 }
 727 
 728 void defaultStream::release(intx holder) {
 729   if (holder == NO_WRITER) {
 730     // nothing to release:  either a recursive lock, or we scribbled (too bad)
 731     return;
 732   }
 733   if (_writer != holder) {
 734     return;  // already unlocked, perhaps via break_tty_lock_for_safepoint
 735   }
 736   _writer = NO_WRITER;
 737   tty_lock->unlock();
 738 }
 739 
 740 
 741 // Yuck:  jio_print does not accept char*/len.
 742 static void call_jio_print(const char* s, size_t len) {
 743   char buffer[O_BUFLEN+100];
 744   if (len > sizeof(buffer)-1) {
 745     warning("increase O_BUFLEN in ostream.cpp -- output truncated");
 746     len = sizeof(buffer)-1;
 747   }
 748   strncpy(buffer, s, len);
 749   buffer[len] = '\0';
 750   jio_print(buffer);
 751 }
 752 
 753 
 754 void defaultStream::write(const char* s, size_t len) {
 755   intx thread_id = os::current_thread_id();
 756   intx holder = hold(thread_id);
 757 
 758   if (DisplayVMOutput &&
 759       (_outer_xmlStream == NULL || !_outer_xmlStream->inside_attrs())) {
 760     // print to output stream. It can be redirected by a vfprintf hook
 761     if (s[len] == '\0') {
 762       jio_print(s);
 763     } else {
 764       call_jio_print(s, len);
 765     }
 766   }
 767 
 768   // print to log file
 769   if (has_log_file()) {
 770     int nl0 = _newlines;
 771     xmlTextStream::write(s, len);
 772     // flush the log file too, if there were any newlines
 773     if (nl0 != _newlines){
 774       flush();
 775     }
 776   } else {
 777     update_position(s, len);
 778   }
 779 
 780   release(holder);
 781 }
 782 
 783 intx ttyLocker::hold_tty() {
 784   if (defaultStream::instance == NULL)  return defaultStream::NO_WRITER;
 785   intx thread_id = os::current_thread_id();
 786   return defaultStream::instance->hold(thread_id);
 787 }
 788 
 789 void ttyLocker::release_tty(intx holder) {
 790   if (holder == defaultStream::NO_WRITER)  return;
 791   defaultStream::instance->release(holder);
 792 }
 793 
 794 bool ttyLocker::release_tty_if_locked() {
 795   intx thread_id = os::current_thread_id();
 796   if (defaultStream::instance->writer() == thread_id) {
 797     // release the lock and return true so callers know if was
 798     // previously held.
 799     release_tty(thread_id);
 800     return true;
 801   }
 802   return false;
 803 }
 804 
 805 void ttyLocker::break_tty_lock_for_safepoint(intx holder) {
 806   if (defaultStream::instance != NULL &&
 807       defaultStream::instance->writer() == holder) {
 808     if (xtty != NULL) {
 809       xtty->print_cr("<!-- safepoint while printing -->");
 810     }
 811     defaultStream::instance->release(holder);
 812   }
 813   // (else there was no lock to break)
 814 }
 815 
 816 void ostream_init() {
 817   if (defaultStream::instance == NULL) {
 818     defaultStream::instance = new(ResourceObj::C_HEAP) defaultStream();
 819     tty = defaultStream::instance;
 820 
 821     // We want to ensure that time stamps in GC logs consider time 0
 822     // the time when the JVM is initialized, not the first time we ask
 823     // for a time stamp. So, here, we explicitly update the time stamp
 824     // of tty.
 825     tty->time_stamp().update_to(1);
 826   }
 827 }
 828 
 829 void ostream_init_log() {
 830   // For -Xloggc:<file> option - called in runtime/thread.cpp
 831   // Note : this must be called AFTER ostream_init()
 832 
 833   gclog_or_tty = tty; // default to tty
 834   if (Arguments::gc_log_filename() != NULL) {
 835     fileStream * gclog  = UseGCLogFileRotation ?
 836                           new(ResourceObj::C_HEAP)
 837                              rotatingFileStream(Arguments::gc_log_filename()) :
 838                           new(ResourceObj::C_HEAP)
 839                              fileStream(Arguments::gc_log_filename());
 840     if (gclog->is_open()) {
 841       // now we update the time stamp of the GC log to be synced up
 842       // with tty.
 843       gclog->time_stamp().update_to(tty->time_stamp().ticks());
 844     }
 845     gclog_or_tty = gclog;
 846   }
 847 
 848   // If we haven't lazily initialized the logfile yet, do it now,
 849   // to avoid the possibility of lazy initialization during a VM
 850   // crash, which can affect the stability of the fatal error handler.
 851   defaultStream::instance->has_log_file();
 852 }
 853 
 854 // ostream_exit() is called during normal VM exit to finish log files, flush
 855 // output and free resource.
 856 void ostream_exit() {
 857   static bool ostream_exit_called = false;
 858   if (ostream_exit_called)  return;
 859   ostream_exit_called = true;
 860   if (gclog_or_tty != tty) {
 861       delete gclog_or_tty;
 862   }
 863   {
 864       // we temporaly disable PrintMallocFree here
 865       // as otherwise it'll lead to using of almost deleted
 866       // tty or defaultStream::instance in logging facility
 867       // of HeapFree(), see 6391258
 868       DEBUG_ONLY(FlagSetting fs(PrintMallocFree, false);)
 869       if (tty != defaultStream::instance) {
 870           delete tty;
 871       }
 872       if (defaultStream::instance != NULL) {
 873           delete defaultStream::instance;
 874       }
 875   }
 876   tty = NULL;
 877   xtty = NULL;
 878   gclog_or_tty = NULL;
 879   defaultStream::instance = NULL;
 880 }
 881 
 882 // ostream_abort() is called by os::abort() when VM is about to die.
 883 void ostream_abort() {
 884   // Here we can't delete gclog_or_tty and tty, just flush their output
 885   if (gclog_or_tty) gclog_or_tty->flush();
 886   if (tty) tty->flush();
 887 
 888   if (defaultStream::instance != NULL) {
 889     static char buf[4096];
 890     defaultStream::instance->finish_log_on_error(buf, sizeof(buf));
 891   }
 892 }
 893 
 894 staticBufferStream::staticBufferStream(char* buffer, size_t buflen,
 895                                        outputStream *outer_stream) {
 896   _buffer = buffer;
 897   _buflen = buflen;
 898   _outer_stream = outer_stream;
 899   // compile task prints time stamp relative to VM start
 900   _stamp.update_to(1);
 901 }
 902 
 903 void staticBufferStream::write(const char* c, size_t len) {
 904   _outer_stream->print_raw(c, (int)len);
 905 }
 906 
 907 void staticBufferStream::flush() {
 908   _outer_stream->flush();
 909 }
 910 
 911 void staticBufferStream::print(const char* format, ...) {
 912   va_list ap;
 913   va_start(ap, format);
 914   size_t len;
 915   const char* str = do_vsnprintf(_buffer, _buflen, format, ap, false, len);
 916   write(str, len);
 917   va_end(ap);
 918 }
 919 
 920 void staticBufferStream::print_cr(const char* format, ...) {
 921   va_list ap;
 922   va_start(ap, format);
 923   size_t len;
 924   const char* str = do_vsnprintf(_buffer, _buflen, format, ap, true, len);
 925   write(str, len);
 926   va_end(ap);
 927 }
 928 
 929 void staticBufferStream::vprint(const char *format, va_list argptr) {
 930   size_t len;
 931   const char* str = do_vsnprintf(_buffer, _buflen, format, argptr, false, len);
 932   write(str, len);
 933 }
 934 
 935 void staticBufferStream::vprint_cr(const char* format, va_list argptr) {
 936   size_t len;
 937   const char* str = do_vsnprintf(_buffer, _buflen, format, argptr, true, len);
 938   write(str, len);
 939 }
 940 
 941 bufferedStream::bufferedStream(size_t initial_size, size_t bufmax) : outputStream() {
 942   buffer_length = initial_size;
 943   buffer        = NEW_C_HEAP_ARRAY(char, buffer_length);
 944   buffer_pos    = 0;
 945   buffer_fixed  = false;
 946   buffer_max    = bufmax;
 947 }
 948 
 949 bufferedStream::bufferedStream(char* fixed_buffer, size_t fixed_buffer_size, size_t bufmax) : outputStream() {
 950   buffer_length = fixed_buffer_size;
 951   buffer        = fixed_buffer;
 952   buffer_pos    = 0;
 953   buffer_fixed  = true;
 954   buffer_max    = bufmax;
 955 }
 956 
 957 void bufferedStream::write(const char* s, size_t len) {
 958 
 959   if(buffer_pos + len > buffer_max) {
 960     flush();
 961   }
 962 
 963   size_t end = buffer_pos + len;
 964   if (end >= buffer_length) {
 965     if (buffer_fixed) {
 966       // if buffer cannot resize, silently truncate
 967       len = buffer_length - buffer_pos - 1;
 968     } else {
 969       // For small overruns, double the buffer.  For larger ones,
 970       // increase to the requested size.
 971       if (end < buffer_length * 2) {
 972         end = buffer_length * 2;
 973       }
 974       buffer = REALLOC_C_HEAP_ARRAY(char, buffer, end);
 975       buffer_length = end;
 976     }
 977   }
 978   memcpy(buffer + buffer_pos, s, len);
 979   buffer_pos += len;
 980   update_position(s, len);
 981 }
 982 
 983 char* bufferedStream::as_string() {
 984   char* copy = NEW_RESOURCE_ARRAY(char, buffer_pos+1);
 985   strncpy(copy, buffer, buffer_pos);
 986   copy[buffer_pos] = 0;  // terminating null
 987   return copy;
 988 }
 989 
 990 bufferedStream::~bufferedStream() {
 991   if (!buffer_fixed) {
 992     FREE_C_HEAP_ARRAY(char, buffer);
 993   }
 994 }
 995 
 996 #ifndef PRODUCT
 997 
 998 #if defined(SOLARIS) || defined(LINUX)
 999 #include <sys/types.h>
1000 #include <sys/socket.h>
1001 #include <netinet/in.h>
1002 #include <arpa/inet.h>
1003 #endif
1004 
1005 // Network access
1006 networkStream::networkStream() : bufferedStream(1024*10, 1024*10) {
1007 
1008   _socket = -1;
1009 
1010   int result = os::socket(AF_INET, SOCK_STREAM, 0);
1011   if (result <= 0) {
1012     assert(false, "Socket could not be created!");
1013   } else {
1014     _socket = result;
1015   }
1016 }
1017 
1018 int networkStream::read(char *buf, size_t len) {
1019   return os::recv(_socket, buf, (int)len, 0);
1020 }
1021 
1022 void networkStream::flush() {
1023   if (size() != 0) {
1024     int result = os::raw_send(_socket, (char *)base(), (int)size(), 0);
1025     assert(result != -1, "connection error");
1026     assert(result == (int)size(), "didn't send enough data");
1027   }
1028   reset();
1029 }
1030 
1031 networkStream::~networkStream() {
1032   close();
1033 }
1034 
1035 void networkStream::close() {
1036   if (_socket != -1) {
1037     flush();
1038     os::socket_close(_socket);
1039     _socket = -1;
1040   }
1041 }
1042 
1043 bool networkStream::connect(const char *ip, short port) {
1044 
1045   struct sockaddr_in server;
1046   server.sin_family = AF_INET;
1047   server.sin_port = htons(port);
1048 
1049   server.sin_addr.s_addr = inet_addr(ip);
1050   if (server.sin_addr.s_addr == (uint32_t)-1) {
1051     struct hostent* host = os::get_host_by_name((char*)ip);
1052     if (host != NULL) {
1053       memcpy(&server.sin_addr, host->h_addr_list[0], host->h_length);
1054     } else {
1055       return false;
1056     }
1057   }
1058 
1059 
1060   int result = os::connect(_socket, (struct sockaddr*)&server, sizeof(struct sockaddr_in));
1061   return (result >= 0);
1062 }
1063 
1064 #endif