1 /*
   2  * Copyright (c) 1997, 2015, 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 "gc/shared/gcId.hpp"
  28 #include "gc/shared/gcId.hpp"
  29 #include "oops/oop.inline.hpp"
  30 #include "runtime/arguments.hpp"
  31 #include "runtime/os.hpp"
  32 #include "runtime/vm_version.hpp"
  33 #include "utilities/defaultStream.hpp"
  34 #include "utilities/macros.hpp"
  35 #include "utilities/ostream.hpp"
  36 #include "utilities/top.hpp"
  37 #include "utilities/xmlstream.hpp"
  38 
  39 extern "C" void jio_print(const char* s); // Declarationtion of jvm method
  40 
  41 outputStream::outputStream(int width) {
  42   _width       = width;
  43   _position    = 0;
  44   _newlines    = 0;
  45   _precount    = 0;
  46   _indentation = 0;
  47 }
  48 
  49 outputStream::outputStream(int width, bool has_time_stamps) {
  50   _width       = width;
  51   _position    = 0;
  52   _newlines    = 0;
  53   _precount    = 0;
  54   _indentation = 0;
  55   if (has_time_stamps)  _stamp.update();
  56 }
  57 
  58 void outputStream::update_position(const char* s, size_t len) {
  59   for (size_t i = 0; i < len; i++) {
  60     char ch = s[i];
  61     if (ch == '\n') {
  62       _newlines += 1;
  63       _precount += _position + 1;
  64       _position = 0;
  65     } else if (ch == '\t') {
  66       int tw = 8 - (_position & 7);
  67       _position += tw;
  68       _precount -= tw-1;  // invariant:  _precount + _position == total count
  69     } else {
  70       _position += 1;
  71     }
  72   }
  73 }
  74 
  75 // Execute a vsprintf, using the given buffer if necessary.
  76 // Return a pointer to the formatted string.
  77 const char* outputStream::do_vsnprintf(char* buffer, size_t buflen,
  78                                        const char* format, va_list ap,
  79                                        bool add_cr,
  80                                        size_t& result_len) {
  81   assert(buflen >= 2, "buffer too small");
  82 
  83   const char* result;
  84   if (add_cr)  buflen--;
  85   if (!strchr(format, '%')) {
  86     // constant format string
  87     result = format;
  88     result_len = strlen(result);
  89     if (add_cr && result_len >= buflen)  result_len = buflen-1;  // truncate
  90   } else if (format[0] == '%' && format[1] == 's' && format[2] == '\0') {
  91     // trivial copy-through format string
  92     result = va_arg(ap, const char*);
  93     result_len = strlen(result);
  94     if (add_cr && result_len >= buflen)  result_len = buflen-1;  // truncate
  95   } else {
  96     // Handle truncation:
  97     // posix: upon truncation, vsnprintf returns number of bytes which
  98     //   would have been written (excluding terminating zero) had the buffer
  99     //   been large enough
 100     // windows: upon truncation, vsnprintf returns -1
 101     const int written = vsnprintf(buffer, buflen, format, ap);
 102     result = buffer;
 103     if (written < (int) buflen && written >= 0) {
 104       result_len = written;
 105     } else {
 106       DEBUG_ONLY(warning("increase O_BUFLEN in ostream.hpp -- output truncated");)
 107       result_len = buflen - 1;
 108       buffer[result_len] = 0;
 109     }
 110   }
 111   if (add_cr) {
 112     if (result != buffer) {
 113       memcpy(buffer, result, result_len);
 114       result = buffer;
 115     }
 116     buffer[result_len++] = '\n';
 117     buffer[result_len] = 0;
 118   }
 119   return result;
 120 }
 121 
 122 void outputStream::print(const char* format, ...) {
 123   char buffer[O_BUFLEN];
 124   va_list ap;
 125   va_start(ap, format);
 126   size_t len;
 127   const char* str = do_vsnprintf(buffer, O_BUFLEN, format, ap, false, len);
 128   write(str, len);
 129   va_end(ap);
 130 }
 131 
 132 void outputStream::print_cr(const char* format, ...) {
 133   char buffer[O_BUFLEN];
 134   va_list ap;
 135   va_start(ap, format);
 136   size_t len;
 137   const char* str = do_vsnprintf(buffer, O_BUFLEN, format, ap, true, len);
 138   write(str, len);
 139   va_end(ap);
 140 }
 141 
 142 void outputStream::vprint(const char *format, va_list argptr) {
 143   char buffer[O_BUFLEN];
 144   size_t len;
 145   const char* str = do_vsnprintf(buffer, O_BUFLEN, format, argptr, false, len);
 146   write(str, len);
 147 }
 148 
 149 void outputStream::vprint_cr(const char* format, va_list argptr) {
 150   char buffer[O_BUFLEN];
 151   size_t len;
 152   const char* str = do_vsnprintf(buffer, O_BUFLEN, format, argptr, true, len);
 153   write(str, len);
 154 }
 155 
 156 void outputStream::fill_to(int col) {
 157   int need_fill = col - position();
 158   sp(need_fill);
 159 }
 160 
 161 void outputStream::move_to(int col, int slop, int min_space) {
 162   if (position() >= col + slop)
 163     cr();
 164   int need_fill = col - position();
 165   if (need_fill < min_space)
 166     need_fill = min_space;
 167   sp(need_fill);
 168 }
 169 
 170 void outputStream::put(char ch) {
 171   assert(ch != 0, "please fix call site");
 172   char buf[] = { ch, '\0' };
 173   write(buf, 1);
 174 }
 175 
 176 #define SP_USE_TABS false
 177 
 178 void outputStream::sp(int count) {
 179   if (count < 0)  return;
 180   if (SP_USE_TABS && count >= 8) {
 181     int target = position() + count;
 182     while (count >= 8) {
 183       this->write("\t", 1);
 184       count -= 8;
 185     }
 186     count = target - position();
 187   }
 188   while (count > 0) {
 189     int nw = (count > 8) ? 8 : count;
 190     this->write("        ", nw);
 191     count -= nw;
 192   }
 193 }
 194 
 195 void outputStream::cr() {
 196   this->write("\n", 1);
 197 }
 198 
 199 void outputStream::stamp() {
 200   if (! _stamp.is_updated()) {
 201     _stamp.update(); // start at 0 on first call to stamp()
 202   }
 203 
 204   // outputStream::stamp() may get called by ostream_abort(), use snprintf
 205   // to avoid allocating large stack buffer in print().
 206   char buf[40];
 207   jio_snprintf(buf, sizeof(buf), "%.3f", _stamp.seconds());
 208   print_raw(buf);
 209 }
 210 
 211 void outputStream::stamp(bool guard,
 212                          const char* prefix,
 213                          const char* suffix) {
 214   if (!guard) {
 215     return;
 216   }
 217   print_raw(prefix);
 218   stamp();
 219   print_raw(suffix);
 220 }
 221 
 222 void outputStream::date_stamp(bool guard,
 223                               const char* prefix,
 224                               const char* suffix) {
 225   if (!guard) {
 226     return;
 227   }
 228   print_raw(prefix);
 229   static const char error_time[] = "yyyy-mm-ddThh:mm:ss.mmm+zzzz";
 230   static const int buffer_length = 32;
 231   char buffer[buffer_length];
 232   const char* iso8601_result = os::iso8601_time(buffer, buffer_length);
 233   if (iso8601_result != NULL) {
 234     print_raw(buffer);
 235   } else {
 236     print_raw(error_time);
 237   }
 238   print_raw(suffix);
 239   return;
 240 }
 241 
 242 outputStream& outputStream::indent() {
 243   while (_position < _indentation) sp();
 244   return *this;
 245 }
 246 
 247 void outputStream::print_jlong(jlong value) {
 248   print(JLONG_FORMAT, value);
 249 }
 250 
 251 void outputStream::print_julong(julong value) {
 252   print(JULONG_FORMAT, value);
 253 }
 254 
 255 /**
 256  * This prints out hex data in a 'windbg' or 'xxd' form, where each line is:
 257  *   <hex-address>: 8 * <hex-halfword> <ascii translation (optional)>
 258  * example:
 259  * 0000000: 7f44 4f46 0102 0102 0000 0000 0000 0000  .DOF............
 260  * 0000010: 0000 0000 0000 0040 0000 0020 0000 0005  .......@... ....
 261  * 0000020: 0000 0000 0000 0040 0000 0000 0000 015d  .......@.......]
 262  * ...
 263  *
 264  * indent is applied to each line.  Ends with a CR.
 265  */
 266 void outputStream::print_data(void* data, size_t len, bool with_ascii) {
 267   size_t limit = (len + 16) / 16 * 16;
 268   for (size_t i = 0; i < limit; ++i) {
 269     if (i % 16 == 0) {
 270       indent().print(INTPTR_FORMAT_W(07) ":", i);
 271     }
 272     if (i % 2 == 0) {
 273       print(" ");
 274     }
 275     if (i < len) {
 276       print("%02x", ((unsigned char*)data)[i]);
 277     } else {
 278       print("  ");
 279     }
 280     if ((i + 1) % 16 == 0) {
 281       if (with_ascii) {
 282         print("  ");
 283         for (size_t j = 0; j < 16; ++j) {
 284           size_t idx = i + j - 15;
 285           if (idx < len) {
 286             char c = ((char*)data)[idx];
 287             print("%c", c >= 32 && c <= 126 ? c : '.');
 288           }
 289         }
 290       }
 291       cr();
 292     }
 293   }
 294 }
 295 
 296 stringStream::stringStream(size_t initial_size) : outputStream() {
 297   buffer_length = initial_size;
 298   buffer        = NEW_RESOURCE_ARRAY(char, buffer_length);
 299   buffer_pos    = 0;
 300   buffer_fixed  = false;
 301   DEBUG_ONLY(rm = Thread::current()->current_resource_mark();)
 302 }
 303 
 304 // useful for output to fixed chunks of memory, such as performance counters
 305 stringStream::stringStream(char* fixed_buffer, size_t fixed_buffer_size) : outputStream() {
 306   buffer_length = fixed_buffer_size;
 307   buffer        = fixed_buffer;
 308   buffer_pos    = 0;
 309   buffer_fixed  = true;
 310 }
 311 
 312 void stringStream::write(const char* s, size_t len) {
 313   size_t write_len = len;               // number of non-null bytes to write
 314   size_t end = buffer_pos + len + 1;    // position after write and final '\0'
 315   if (end > buffer_length) {
 316     if (buffer_fixed) {
 317       // if buffer cannot resize, silently truncate
 318       end = buffer_length;
 319       write_len = end - buffer_pos - 1; // leave room for the final '\0'
 320     } else {
 321       // For small overruns, double the buffer.  For larger ones,
 322       // increase to the requested size.
 323       if (end < buffer_length * 2) {
 324         end = buffer_length * 2;
 325       }
 326       char* oldbuf = buffer;
 327       assert(rm == NULL || Thread::current()->current_resource_mark() == rm,
 328              "stringStream is re-allocated with a different ResourceMark");
 329       buffer = NEW_RESOURCE_ARRAY(char, end);
 330       if (buffer_pos > 0) {
 331         memcpy(buffer, oldbuf, buffer_pos);
 332       }
 333       buffer_length = end;
 334     }
 335   }
 336   // invariant: buffer is always null-terminated
 337   guarantee(buffer_pos + write_len + 1 <= buffer_length, "stringStream oob");
 338   if (write_len > 0) {
 339     buffer[buffer_pos + write_len] = 0;
 340     memcpy(buffer + buffer_pos, s, write_len);
 341     buffer_pos += write_len;
 342   }
 343 
 344   // Note that the following does not depend on write_len.
 345   // This means that position and count get updated
 346   // even when overflow occurs.
 347   update_position(s, len);
 348 }
 349 
 350 char* stringStream::as_string() {
 351   char* copy = NEW_RESOURCE_ARRAY(char, buffer_pos + 1);
 352   strncpy(copy, buffer, buffer_pos);
 353   copy[buffer_pos] = 0;  // terminating null
 354   return copy;
 355 }
 356 
 357 stringStream::~stringStream() {}
 358 
 359 xmlStream*   xtty;
 360 outputStream* tty;
 361 outputStream* gclog_or_tty;
 362 CDS_ONLY(fileStream* classlist_file;) // Only dump the classes that can be stored into the CDS archive
 363 extern Mutex* tty_lock;
 364 
 365 #define EXTRACHARLEN   32
 366 #define CURRENTAPPX    ".current"
 367 // convert YYYY-MM-DD HH:MM:SS to YYYY-MM-DD_HH-MM-SS
 368 char* get_datetime_string(char *buf, size_t len) {
 369   os::local_time_string(buf, len);
 370   int i = (int)strlen(buf);
 371   while (i-- >= 0) {
 372     if (buf[i] == ' ') buf[i] = '_';
 373     else if (buf[i] == ':') buf[i] = '-';
 374   }
 375   return buf;
 376 }
 377 
 378 static const char* make_log_name_internal(const char* log_name, const char* force_directory,
 379                                                 int pid, const char* tms) {
 380   const char* basename = log_name;
 381   char file_sep = os::file_separator()[0];
 382   const char* cp;
 383   char  pid_text[32];
 384 
 385   for (cp = log_name; *cp != '\0'; cp++) {
 386     if (*cp == '/' || *cp == file_sep) {
 387       basename = cp + 1;
 388     }
 389   }
 390   const char* nametail = log_name;
 391   // Compute buffer length
 392   size_t buffer_length;
 393   if (force_directory != NULL) {
 394     buffer_length = strlen(force_directory) + strlen(os::file_separator()) +
 395                     strlen(basename) + 1;
 396   } else {
 397     buffer_length = strlen(log_name) + 1;
 398   }
 399 
 400   const char* pts = strstr(basename, "%p");
 401   int pid_pos = (pts == NULL) ? -1 : (pts - nametail);
 402 
 403   if (pid_pos >= 0) {
 404     jio_snprintf(pid_text, sizeof(pid_text), "pid%u", pid);
 405     buffer_length += strlen(pid_text);
 406   }
 407 
 408   pts = strstr(basename, "%t");
 409   int tms_pos = (pts == NULL) ? -1 : (pts - nametail);
 410   if (tms_pos >= 0) {
 411     buffer_length += strlen(tms);
 412   }
 413 
 414   // File name is too long.
 415   if (buffer_length > JVM_MAXPATHLEN) {
 416     return NULL;
 417   }
 418 
 419   // Create big enough buffer.
 420   char *buf = NEW_C_HEAP_ARRAY(char, buffer_length, mtInternal);
 421 
 422   strcpy(buf, "");
 423   if (force_directory != NULL) {
 424     strcat(buf, force_directory);
 425     strcat(buf, os::file_separator());
 426     nametail = basename;       // completely skip directory prefix
 427   }
 428 
 429   // who is first, %p or %t?
 430   int first = -1, second = -1;
 431   const char *p1st = NULL;
 432   const char *p2nd = NULL;
 433 
 434   if (pid_pos >= 0 && tms_pos >= 0) {
 435     // contains both %p and %t
 436     if (pid_pos < tms_pos) {
 437       // case foo%pbar%tmonkey.log
 438       first  = pid_pos;
 439       p1st   = pid_text;
 440       second = tms_pos;
 441       p2nd   = tms;
 442     } else {
 443       // case foo%tbar%pmonkey.log
 444       first  = tms_pos;
 445       p1st   = tms;
 446       second = pid_pos;
 447       p2nd   = pid_text;
 448     }
 449   } else if (pid_pos >= 0) {
 450     // contains %p only
 451     first  = pid_pos;
 452     p1st   = pid_text;
 453   } else if (tms_pos >= 0) {
 454     // contains %t only
 455     first  = tms_pos;
 456     p1st   = tms;
 457   }
 458 
 459   int buf_pos = (int)strlen(buf);
 460   const char* tail = nametail;
 461 
 462   if (first >= 0) {
 463     tail = nametail + first + 2;
 464     strncpy(&buf[buf_pos], nametail, first);
 465     strcpy(&buf[buf_pos + first], p1st);
 466     buf_pos = (int)strlen(buf);
 467     if (second >= 0) {
 468       strncpy(&buf[buf_pos], tail, second - first - 2);
 469       strcpy(&buf[buf_pos + second - first - 2], p2nd);
 470       tail = nametail + second + 2;
 471     }
 472   }
 473   strcat(buf, tail);      // append rest of name, or all of name
 474   return buf;
 475 }
 476 
 477 // log_name comes from -XX:LogFile=log_name, -Xloggc:log_name or
 478 // -XX:DumpLoadedClassList=<file_name>
 479 // in log_name, %p => pid1234 and
 480 //              %t => YYYY-MM-DD_HH-MM-SS
 481 static const char* make_log_name(const char* log_name, const char* force_directory) {
 482   char timestr[32];
 483   get_datetime_string(timestr, sizeof(timestr));
 484   return make_log_name_internal(log_name, force_directory, os::current_process_id(),
 485                                 timestr);
 486 }
 487 
 488 #ifndef PRODUCT
 489 void test_loggc_filename() {
 490   int pid;
 491   char  tms[32];
 492   char  i_result[JVM_MAXPATHLEN];
 493   const char* o_result;
 494   get_datetime_string(tms, sizeof(tms));
 495   pid = os::current_process_id();
 496 
 497   // test.log
 498   jio_snprintf(i_result, JVM_MAXPATHLEN, "test.log", tms);
 499   o_result = make_log_name_internal("test.log", NULL, pid, tms);
 500   assert(strcmp(i_result, o_result) == 0, "failed on testing make_log_name(\"test.log\", NULL)");
 501   FREE_C_HEAP_ARRAY(char, o_result);
 502 
 503   // test-%t-%p.log
 504   jio_snprintf(i_result, JVM_MAXPATHLEN, "test-%s-pid%u.log", tms, pid);
 505   o_result = make_log_name_internal("test-%t-%p.log", NULL, pid, tms);
 506   assert(strcmp(i_result, o_result) == 0, "failed on testing make_log_name(\"test-%%t-%%p.log\", NULL)");
 507   FREE_C_HEAP_ARRAY(char, o_result);
 508 
 509   // test-%t%p.log
 510   jio_snprintf(i_result, JVM_MAXPATHLEN, "test-%spid%u.log", tms, pid);
 511   o_result = make_log_name_internal("test-%t%p.log", NULL, pid, tms);
 512   assert(strcmp(i_result, o_result) == 0, "failed on testing make_log_name(\"test-%%t%%p.log\", NULL)");
 513   FREE_C_HEAP_ARRAY(char, o_result);
 514 
 515   // %p%t.log
 516   jio_snprintf(i_result, JVM_MAXPATHLEN, "pid%u%s.log", pid, tms);
 517   o_result = make_log_name_internal("%p%t.log", NULL, pid, tms);
 518   assert(strcmp(i_result, o_result) == 0, "failed on testing make_log_name(\"%%p%%t.log\", NULL)");
 519   FREE_C_HEAP_ARRAY(char, o_result);
 520 
 521   // %p-test.log
 522   jio_snprintf(i_result, JVM_MAXPATHLEN, "pid%u-test.log", pid);
 523   o_result = make_log_name_internal("%p-test.log", NULL, pid, tms);
 524   assert(strcmp(i_result, o_result) == 0, "failed on testing make_log_name(\"%%p-test.log\", NULL)");
 525   FREE_C_HEAP_ARRAY(char, o_result);
 526 
 527   // %t.log
 528   jio_snprintf(i_result, JVM_MAXPATHLEN, "%s.log", tms);
 529   o_result = make_log_name_internal("%t.log", NULL, pid, tms);
 530   assert(strcmp(i_result, o_result) == 0, "failed on testing make_log_name(\"%%t.log\", NULL)");
 531   FREE_C_HEAP_ARRAY(char, o_result);
 532 
 533   {
 534     // longest filename
 535     char longest_name[JVM_MAXPATHLEN];
 536     memset(longest_name, 'a', sizeof(longest_name));
 537     longest_name[JVM_MAXPATHLEN - 1] = '\0';
 538     o_result = make_log_name_internal((const char*)&longest_name, NULL, pid, tms);
 539     assert(strcmp(longest_name, o_result) == 0, "longest name does not match. expected '%s' but got '%s'", longest_name, o_result);
 540     FREE_C_HEAP_ARRAY(char, o_result);
 541   }
 542 
 543   {
 544     // too long file name
 545     char too_long_name[JVM_MAXPATHLEN + 100];
 546     int too_long_length = sizeof(too_long_name);
 547     memset(too_long_name, 'a', too_long_length);
 548     too_long_name[too_long_length - 1] = '\0';
 549     o_result = make_log_name_internal((const char*)&too_long_name, NULL, pid, tms);
 550     assert(o_result == NULL, "Too long file name should return NULL, but got '%s'", o_result);
 551   }
 552 
 553   {
 554     // too long with timestamp
 555     char longest_name[JVM_MAXPATHLEN];
 556     memset(longest_name, 'a', JVM_MAXPATHLEN);
 557     longest_name[JVM_MAXPATHLEN - 3] = '%';
 558     longest_name[JVM_MAXPATHLEN - 2] = 't';
 559     longest_name[JVM_MAXPATHLEN - 1] = '\0';
 560     o_result = make_log_name_internal((const char*)&longest_name, NULL, pid, tms);
 561     assert(o_result == NULL, "Too long file name after timestamp expansion should return NULL, but got '%s'", o_result);
 562   }
 563 
 564   {
 565     // too long with pid
 566     char longest_name[JVM_MAXPATHLEN];
 567     memset(longest_name, 'a', JVM_MAXPATHLEN);
 568     longest_name[JVM_MAXPATHLEN - 3] = '%';
 569     longest_name[JVM_MAXPATHLEN - 2] = 'p';
 570     longest_name[JVM_MAXPATHLEN - 1] = '\0';
 571     o_result = make_log_name_internal((const char*)&longest_name, NULL, pid, tms);
 572     assert(o_result == NULL, "Too long file name after pid expansion should return NULL, but got '%s'", o_result);
 573   }
 574 }
 575 #endif // PRODUCT
 576 
 577 fileStream::fileStream(const char* file_name) {
 578   _file = fopen(file_name, "w");
 579   if (_file != NULL) {
 580     _need_close = true;
 581   } else {
 582     warning("Cannot open file %s due to %s\n", file_name, strerror(errno));
 583     _need_close = false;
 584   }
 585 }
 586 
 587 fileStream::fileStream(const char* file_name, const char* opentype) {
 588   _file = fopen(file_name, opentype);
 589   if (_file != NULL) {
 590     _need_close = true;
 591   } else {
 592     warning("Cannot open file %s due to %s\n", file_name, strerror(errno));
 593     _need_close = false;
 594   }
 595 }
 596 
 597 void fileStream::write(const char* s, size_t len) {
 598   if (_file != NULL)  {
 599     // Make an unused local variable to avoid warning from gcc 4.x compiler.
 600     size_t count = fwrite(s, 1, len, _file);
 601   }
 602   update_position(s, len);
 603 }
 604 
 605 long fileStream::fileSize() {
 606   long size = -1;
 607   if (_file != NULL) {
 608     long pos  = ::ftell(_file);
 609     if (::fseek(_file, 0, SEEK_END) == 0) {
 610       size = ::ftell(_file);
 611     }
 612     ::fseek(_file, pos, SEEK_SET);
 613   }
 614   return size;
 615 }
 616 
 617 char* fileStream::readln(char *data, int count ) {
 618   char * ret = ::fgets(data, count, _file);
 619   //Get rid of annoying \n char
 620   data[::strlen(data)-1] = '\0';
 621   return ret;
 622 }
 623 
 624 fileStream::~fileStream() {
 625   if (_file != NULL) {
 626     if (_need_close) fclose(_file);
 627     _file      = NULL;
 628   }
 629 }
 630 
 631 void fileStream::flush() {
 632   fflush(_file);
 633 }
 634 
 635 fdStream::fdStream(const char* file_name) {
 636   _fd = open(file_name, O_WRONLY | O_CREAT | O_TRUNC, 0666);
 637   _need_close = true;
 638 }
 639 
 640 fdStream::~fdStream() {
 641   if (_fd != -1) {
 642     if (_need_close) close(_fd);
 643     _fd = -1;
 644   }
 645 }
 646 
 647 void fdStream::write(const char* s, size_t len) {
 648   if (_fd != -1) {
 649     // Make an unused local variable to avoid warning from gcc 4.x compiler.
 650     size_t count = ::write(_fd, s, (int)len);
 651   }
 652   update_position(s, len);
 653 }
 654 
 655 // dump vm version, os version, platform info, build id,
 656 // memory usage and command line flags into header
 657 void gcLogFileStream::dump_loggc_header() {
 658   if (is_open()) {
 659     print_cr("%s", Abstract_VM_Version::internal_vm_info_string());
 660     os::print_memory_info(this);
 661     print("CommandLine flags: ");
 662     CommandLineFlags::printSetFlags(this);
 663   }
 664 }
 665 
 666 gcLogFileStream::~gcLogFileStream() {
 667   if (_file != NULL) {
 668     if (_need_close) fclose(_file);
 669     _file = NULL;
 670   }
 671   if (_file_name != NULL) {
 672     FREE_C_HEAP_ARRAY(char, _file_name);
 673     _file_name = NULL;
 674   }
 675 }
 676 
 677 gcLogFileStream::gcLogFileStream(const char* file_name) {
 678   _cur_file_num = 0;
 679   _bytes_written = 0L;
 680   _file_name = make_log_name(file_name, NULL);
 681 
 682   if (_file_name == NULL) {
 683     warning("Cannot open file %s: file name is too long.\n", file_name);
 684     _need_close = false;
 685     UseGCLogFileRotation = false;
 686     return;
 687   }
 688 
 689   // gc log file rotation
 690   if (UseGCLogFileRotation && NumberOfGCLogFiles > 1) {
 691     char tempbuf[JVM_MAXPATHLEN];
 692     jio_snprintf(tempbuf, sizeof(tempbuf), "%s.%d" CURRENTAPPX, _file_name, _cur_file_num);
 693     _file = fopen(tempbuf, "w");
 694   } else {
 695     _file = fopen(_file_name, "w");
 696   }
 697   if (_file != NULL) {
 698     _need_close = true;
 699     dump_loggc_header();
 700   } else {
 701     warning("Cannot open file %s due to %s\n", _file_name, strerror(errno));
 702     _need_close = false;
 703   }
 704 }
 705 
 706 void gcLogFileStream::write(const char* s, size_t len) {
 707   if (_file != NULL) {
 708     size_t count = fwrite(s, 1, len, _file);
 709     _bytes_written += count;
 710   }
 711   update_position(s, len);
 712 }
 713 
 714 // rotate_log must be called from VMThread at safepoint. In case need change parameters
 715 // for gc log rotation from thread other than VMThread, a sub type of VM_Operation
 716 // should be created and be submitted to VMThread's operation queue. DO NOT call this
 717 // function directly. Currently, it is safe to rotate log at safepoint through VMThread.
 718 // That is, no mutator threads and concurrent GC threads run parallel with VMThread to
 719 // write to gc log file at safepoint. If in future, changes made for mutator threads or
 720 // concurrent GC threads to run parallel with VMThread at safepoint, write and rotate_log
 721 // must be synchronized.
 722 void gcLogFileStream::rotate_log(bool force, outputStream* out) {
 723   char time_msg[O_BUFLEN];
 724   char time_str[EXTRACHARLEN];
 725   char current_file_name[JVM_MAXPATHLEN];
 726   char renamed_file_name[JVM_MAXPATHLEN];
 727 
 728   if (!should_rotate(force)) {
 729     return;
 730   }
 731 
 732 #ifdef ASSERT
 733   Thread *thread = Thread::current();
 734   assert(thread == NULL ||
 735          (thread->is_VM_thread() && SafepointSynchronize::is_at_safepoint()),
 736          "Must be VMThread at safepoint");
 737 #endif
 738   if (NumberOfGCLogFiles == 1) {
 739     // rotate in same file
 740     rewind();
 741     _bytes_written = 0L;
 742     jio_snprintf(time_msg, sizeof(time_msg), "File  %s rotated at %s\n",
 743                  _file_name, os::local_time_string((char *)time_str, sizeof(time_str)));
 744     write(time_msg, strlen(time_msg));
 745 
 746     if (out != NULL) {
 747       out->print("%s", time_msg);
 748     }
 749 
 750     dump_loggc_header();
 751     return;
 752   }
 753 
 754 #if defined(_WINDOWS)
 755 #ifndef F_OK
 756 #define F_OK 0
 757 #endif
 758 #endif // _WINDOWS
 759 
 760   // rotate file in names extended_filename.0, extended_filename.1, ...,
 761   // extended_filename.<NumberOfGCLogFiles - 1>. Current rotation file name will
 762   // have a form of extended_filename.<i>.current where i is the current rotation
 763   // file number. After it reaches max file size, the file will be saved and renamed
 764   // with .current removed from its tail.
 765   if (_file != NULL) {
 766     jio_snprintf(renamed_file_name, JVM_MAXPATHLEN, "%s.%d",
 767                  _file_name, _cur_file_num);
 768     int result = jio_snprintf(current_file_name, JVM_MAXPATHLEN,
 769                               "%s.%d" CURRENTAPPX, _file_name, _cur_file_num);
 770     if (result >= JVM_MAXPATHLEN) {
 771       warning("Cannot create new log file name: %s: file name is too long.\n", current_file_name);
 772       return;
 773     }
 774 
 775     const char* msg = force ? "GC log rotation request has been received."
 776                             : "GC log file has reached the maximum size.";
 777     jio_snprintf(time_msg, sizeof(time_msg), "%s %s Saved as %s\n",
 778                      os::local_time_string((char *)time_str, sizeof(time_str)),
 779                                                          msg, renamed_file_name);
 780     write(time_msg, strlen(time_msg));
 781 
 782     if (out != NULL) {
 783       out->print("%s", time_msg);
 784     }
 785 
 786     fclose(_file);
 787     _file = NULL;
 788 
 789     bool can_rename = true;
 790     if (access(current_file_name, F_OK) != 0) {
 791       // current file does not exist?
 792       warning("No source file exists, cannot rename\n");
 793       can_rename = false;
 794     }
 795     if (can_rename) {
 796       if (access(renamed_file_name, F_OK) == 0) {
 797         if (remove(renamed_file_name) != 0) {
 798           warning("Could not delete existing file %s\n", renamed_file_name);
 799           can_rename = false;
 800         }
 801       } else {
 802         // file does not exist, ok to rename
 803       }
 804     }
 805     if (can_rename && rename(current_file_name, renamed_file_name) != 0) {
 806       warning("Could not rename %s to %s\n", _file_name, renamed_file_name);
 807     }
 808   }
 809 
 810   _cur_file_num++;
 811   if (_cur_file_num > NumberOfGCLogFiles - 1) _cur_file_num = 0;
 812   int result = jio_snprintf(current_file_name,  JVM_MAXPATHLEN, "%s.%d" CURRENTAPPX,
 813                _file_name, _cur_file_num);
 814   if (result >= JVM_MAXPATHLEN) {
 815     warning("Cannot create new log file name: %s: file name is too long.\n", current_file_name);
 816     return;
 817   }
 818 
 819   _file = fopen(current_file_name, "w");
 820 
 821   if (_file != NULL) {
 822     _bytes_written = 0L;
 823     _need_close = true;
 824     // reuse current_file_name for time_msg
 825     jio_snprintf(current_file_name, JVM_MAXPATHLEN,
 826                  "%s.%d", _file_name, _cur_file_num);
 827     jio_snprintf(time_msg, sizeof(time_msg), "%s GC log file created %s\n",
 828                  os::local_time_string((char *)time_str, sizeof(time_str)), current_file_name);
 829     write(time_msg, strlen(time_msg));
 830 
 831     if (out != NULL) {
 832       out->print("%s", time_msg);
 833     }
 834 
 835     dump_loggc_header();
 836     // remove the existing file
 837     if (access(current_file_name, F_OK) == 0) {
 838       if (remove(current_file_name) != 0) {
 839         warning("Could not delete existing file %s\n", current_file_name);
 840       }
 841     }
 842   } else {
 843     warning("failed to open rotation log file %s due to %s\n"
 844             "Turned off GC log file rotation\n",
 845                   _file_name, strerror(errno));
 846     _need_close = false;
 847     FLAG_SET_DEFAULT(UseGCLogFileRotation, false);
 848   }
 849 }
 850 
 851 defaultStream* defaultStream::instance = NULL;
 852 int defaultStream::_output_fd = 1;
 853 int defaultStream::_error_fd  = 2;
 854 FILE* defaultStream::_output_stream = stdout;
 855 FILE* defaultStream::_error_stream  = stderr;
 856 
 857 #define LOG_MAJOR_VERSION 160
 858 #define LOG_MINOR_VERSION 1
 859 
 860 void defaultStream::init() {
 861   _inited = true;
 862   if (LogVMOutput || LogCompilation) {
 863     init_log();
 864   }
 865 }
 866 
 867 bool defaultStream::has_log_file() {
 868   // lazily create log file (at startup, LogVMOutput is false even
 869   // if +LogVMOutput is used, because the flags haven't been parsed yet)
 870   // For safer printing during fatal error handling, do not init logfile
 871   // if a VM error has been reported.
 872   if (!_inited && !is_error_reported())  init();
 873   return _log_file != NULL;
 874 }
 875 
 876 fileStream* defaultStream::open_file(const char* log_name) {
 877   const char* try_name = make_log_name(log_name, NULL);
 878   if (try_name == NULL) {
 879     warning("Cannot open file %s: file name is too long.\n", log_name);
 880     return NULL;
 881   }
 882 
 883   fileStream* file = new(ResourceObj::C_HEAP, mtInternal) fileStream(try_name);
 884   FREE_C_HEAP_ARRAY(char, try_name);
 885   if (file->is_open()) {
 886     return file;
 887   }
 888 
 889   // Try again to open the file in the temp directory.
 890   delete file;
 891   char warnbuf[O_BUFLEN*2];
 892   jio_snprintf(warnbuf, sizeof(warnbuf), "Warning:  Cannot open log file: %s\n", log_name);
 893   // Note:  This feature is for maintainer use only.  No need for L10N.
 894   jio_print(warnbuf);
 895   try_name = make_log_name(log_name, os::get_temp_directory());
 896   if (try_name == NULL) {
 897     warning("Cannot open file %s: file name is too long for directory %s.\n", log_name, os::get_temp_directory());
 898     return NULL;
 899   }
 900 
 901   jio_snprintf(warnbuf, sizeof(warnbuf),
 902                "Warning:  Forcing option -XX:LogFile=%s\n", try_name);
 903   jio_print(warnbuf);
 904 
 905   file = new(ResourceObj::C_HEAP, mtInternal) fileStream(try_name);
 906   FREE_C_HEAP_ARRAY(char, try_name);
 907   if (file->is_open()) {
 908     return file;
 909   }
 910 
 911   delete file;
 912   return NULL;
 913 }
 914 
 915 void defaultStream::init_log() {
 916   // %%% Need a MutexLocker?
 917   const char* log_name = LogFile != NULL ? LogFile : "hotspot_%p.log";
 918   fileStream* file = open_file(log_name);
 919 
 920   if (file != NULL) {
 921     _log_file = file;
 922     _outer_xmlStream = new(ResourceObj::C_HEAP, mtInternal) xmlStream(file);
 923     start_log();
 924   } else {
 925     // and leave xtty as NULL
 926     LogVMOutput = false;
 927     DisplayVMOutput = true;
 928     LogCompilation = false;
 929   }
 930 }
 931 
 932 void defaultStream::start_log() {
 933   xmlStream*xs = _outer_xmlStream;
 934     if (this == tty)  xtty = xs;
 935     // Write XML header.
 936     xs->print_cr("<?xml version='1.0' encoding='UTF-8'?>");
 937     // (For now, don't bother to issue a DTD for this private format.)
 938     jlong time_ms = os::javaTimeMillis() - tty->time_stamp().milliseconds();
 939     // %%% Should be: jlong time_ms = os::start_time_milliseconds(), if
 940     // we ever get round to introduce that method on the os class
 941     xs->head("hotspot_log version='%d %d'"
 942              " process='%d' time_ms='" INT64_FORMAT "'",
 943              LOG_MAJOR_VERSION, LOG_MINOR_VERSION,
 944              os::current_process_id(), (int64_t)time_ms);
 945     // Write VM version header immediately.
 946     xs->head("vm_version");
 947     xs->head("name"); xs->text("%s", VM_Version::vm_name()); xs->cr();
 948     xs->tail("name");
 949     xs->head("release"); xs->text("%s", VM_Version::vm_release()); xs->cr();
 950     xs->tail("release");
 951     xs->head("info"); xs->text("%s", VM_Version::internal_vm_info_string()); xs->cr();
 952     xs->tail("info");
 953     xs->tail("vm_version");
 954     // Record information about the command-line invocation.
 955     xs->head("vm_arguments");  // Cf. Arguments::print_on()
 956     if (Arguments::num_jvm_flags() > 0) {
 957       xs->head("flags");
 958       Arguments::print_jvm_flags_on(xs->text());
 959       xs->tail("flags");
 960     }
 961     if (Arguments::num_jvm_args() > 0) {
 962       xs->head("args");
 963       Arguments::print_jvm_args_on(xs->text());
 964       xs->tail("args");
 965     }
 966     if (Arguments::java_command() != NULL) {
 967       xs->head("command"); xs->text()->print_cr("%s", Arguments::java_command());
 968       xs->tail("command");
 969     }
 970     if (Arguments::sun_java_launcher() != NULL) {
 971       xs->head("launcher"); xs->text()->print_cr("%s", Arguments::sun_java_launcher());
 972       xs->tail("launcher");
 973     }
 974     if (Arguments::system_properties() !=  NULL) {
 975       xs->head("properties");
 976       // Print it as a java-style property list.
 977       // System properties don't generally contain newlines, so don't bother with unparsing.
 978       outputStream *text = xs->text();
 979       for (SystemProperty* p = Arguments::system_properties(); p != NULL; p = p->next()) {
 980         // Print in two stages to avoid problems with long
 981         // keys/values.
 982         text->print_raw(p->key());
 983         text->put('=');
 984         text->print_raw_cr(p->value());
 985       }
 986       xs->tail("properties");
 987     }
 988     xs->tail("vm_arguments");
 989     // tty output per se is grouped under the <tty>...</tty> element.
 990     xs->head("tty");
 991     // All further non-markup text gets copied to the tty:
 992     xs->_text = this;  // requires friend declaration!
 993 }
 994 
 995 // finish_log() is called during normal VM shutdown. finish_log_on_error() is
 996 // called by ostream_abort() after a fatal error.
 997 //
 998 void defaultStream::finish_log() {
 999   xmlStream* xs = _outer_xmlStream;
1000   xs->done("tty");
1001 
1002   // Other log forks are appended here, at the End of Time:
1003   CompileLog::finish_log(xs->out());  // write compile logging, if any, now
1004 
1005   xs->done("hotspot_log");
1006   xs->flush();
1007 
1008   fileStream* file = _log_file;
1009   _log_file = NULL;
1010 
1011   delete _outer_xmlStream;
1012   _outer_xmlStream = NULL;
1013 
1014   file->flush();
1015   delete file;
1016 }
1017 
1018 void defaultStream::finish_log_on_error(char *buf, int buflen) {
1019   xmlStream* xs = _outer_xmlStream;
1020 
1021   if (xs && xs->out()) {
1022 
1023     xs->done_raw("tty");
1024 
1025     // Other log forks are appended here, at the End of Time:
1026     CompileLog::finish_log_on_error(xs->out(), buf, buflen);  // write compile logging, if any, now
1027 
1028     xs->done_raw("hotspot_log");
1029     xs->flush();
1030 
1031     fileStream* file = _log_file;
1032     _log_file = NULL;
1033     _outer_xmlStream = NULL;
1034 
1035     if (file) {
1036       file->flush();
1037 
1038       // Can't delete or close the file because delete and fclose aren't
1039       // async-safe. We are about to die, so leave it to the kernel.
1040       // delete file;
1041     }
1042   }
1043 }
1044 
1045 intx defaultStream::hold(intx writer_id) {
1046   bool has_log = has_log_file();  // check before locking
1047   if (// impossible, but who knows?
1048       writer_id == NO_WRITER ||
1049 
1050       // bootstrap problem
1051       tty_lock == NULL ||
1052 
1053       // can't grab a lock or call Thread::current() if TLS isn't initialized
1054       ThreadLocalStorage::thread() == NULL ||
1055 
1056       // developer hook
1057       !SerializeVMOutput ||
1058 
1059       // VM already unhealthy
1060       is_error_reported() ||
1061 
1062       // safepoint == global lock (for VM only)
1063       (SafepointSynchronize::is_synchronizing() &&
1064        Thread::current()->is_VM_thread())
1065       ) {
1066     // do not attempt to lock unless we know the thread and the VM is healthy
1067     return NO_WRITER;
1068   }
1069   if (_writer == writer_id) {
1070     // already held, no need to re-grab the lock
1071     return NO_WRITER;
1072   }
1073   tty_lock->lock_without_safepoint_check();
1074   // got the lock
1075   if (writer_id != _last_writer) {
1076     if (has_log) {
1077       _log_file->bol();
1078       // output a hint where this output is coming from:
1079       _log_file->print_cr("<writer thread='" UINTX_FORMAT "'/>", writer_id);
1080     }
1081     _last_writer = writer_id;
1082   }
1083   _writer = writer_id;
1084   return writer_id;
1085 }
1086 
1087 void defaultStream::release(intx holder) {
1088   if (holder == NO_WRITER) {
1089     // nothing to release:  either a recursive lock, or we scribbled (too bad)
1090     return;
1091   }
1092   if (_writer != holder) {
1093     return;  // already unlocked, perhaps via break_tty_lock_for_safepoint
1094   }
1095   _writer = NO_WRITER;
1096   tty_lock->unlock();
1097 }
1098 
1099 
1100 // Yuck:  jio_print does not accept char*/len.
1101 static void call_jio_print(const char* s, size_t len) {
1102   char buffer[O_BUFLEN+100];
1103   if (len > sizeof(buffer)-1) {
1104     warning("increase O_BUFLEN in ostream.cpp -- output truncated");
1105     len = sizeof(buffer)-1;
1106   }
1107   strncpy(buffer, s, len);
1108   buffer[len] = '\0';
1109   jio_print(buffer);
1110 }
1111 
1112 
1113 void defaultStream::write(const char* s, size_t len) {
1114   intx thread_id = os::current_thread_id();
1115   intx holder = hold(thread_id);
1116 
1117   if (DisplayVMOutput &&
1118       (_outer_xmlStream == NULL || !_outer_xmlStream->inside_attrs())) {
1119     // print to output stream. It can be redirected by a vfprintf hook
1120     if (s[len] == '\0') {
1121       jio_print(s);
1122     } else {
1123       call_jio_print(s, len);
1124     }
1125   }
1126 
1127   // print to log file
1128   if (has_log_file()) {
1129     int nl0 = _newlines;
1130     xmlTextStream::write(s, len);
1131     // flush the log file too, if there were any newlines
1132     if (nl0 != _newlines){
1133       flush();
1134     }
1135   } else {
1136     update_position(s, len);
1137   }
1138 
1139   release(holder);
1140 }
1141 
1142 intx ttyLocker::hold_tty() {
1143   if (defaultStream::instance == NULL)  return defaultStream::NO_WRITER;
1144   intx thread_id = os::current_thread_id();
1145   return defaultStream::instance->hold(thread_id);
1146 }
1147 
1148 void ttyLocker::release_tty(intx holder) {
1149   if (holder == defaultStream::NO_WRITER)  return;
1150   defaultStream::instance->release(holder);
1151 }
1152 
1153 bool ttyLocker::release_tty_if_locked() {
1154   intx thread_id = os::current_thread_id();
1155   if (defaultStream::instance->writer() == thread_id) {
1156     // release the lock and return true so callers know if was
1157     // previously held.
1158     release_tty(thread_id);
1159     return true;
1160   }
1161   return false;
1162 }
1163 
1164 void ttyLocker::break_tty_lock_for_safepoint(intx holder) {
1165   if (defaultStream::instance != NULL &&
1166       defaultStream::instance->writer() == holder) {
1167     if (xtty != NULL) {
1168       xtty->print_cr("<!-- safepoint while printing -->");
1169     }
1170     defaultStream::instance->release(holder);
1171   }
1172   // (else there was no lock to break)
1173 }
1174 
1175 void ostream_init() {
1176   if (defaultStream::instance == NULL) {
1177     defaultStream::instance = new(ResourceObj::C_HEAP, mtInternal) defaultStream();
1178     tty = defaultStream::instance;
1179 
1180     // We want to ensure that time stamps in GC logs consider time 0
1181     // the time when the JVM is initialized, not the first time we ask
1182     // for a time stamp. So, here, we explicitly update the time stamp
1183     // of tty.
1184     tty->time_stamp().update_to(1);
1185   }
1186 }
1187 
1188 void ostream_init_log() {
1189   // For -Xloggc:<file> option - called in runtime/thread.cpp
1190   // Note : this must be called AFTER ostream_init()
1191 
1192   gclog_or_tty = tty; // default to tty
1193   if (Arguments::gc_log_filename() != NULL) {
1194     fileStream * gclog  = new(ResourceObj::C_HEAP, mtInternal)
1195                              gcLogFileStream(Arguments::gc_log_filename());
1196     if (gclog->is_open()) {
1197       // now we update the time stamp of the GC log to be synced up
1198       // with tty.
1199       gclog->time_stamp().update_to(tty->time_stamp().ticks());
1200     }
1201     gclog_or_tty = gclog;
1202   }
1203 
1204 #if INCLUDE_CDS
1205   // For -XX:DumpLoadedClassList=<file> option
1206   if (DumpLoadedClassList != NULL) {
1207     const char* list_name = make_log_name(DumpLoadedClassList, NULL);
1208     classlist_file = new(ResourceObj::C_HEAP, mtInternal)
1209                          fileStream(list_name);
1210     FREE_C_HEAP_ARRAY(char, list_name);
1211   }
1212 #endif
1213 
1214   // If we haven't lazily initialized the logfile yet, do it now,
1215   // to avoid the possibility of lazy initialization during a VM
1216   // crash, which can affect the stability of the fatal error handler.
1217   defaultStream::instance->has_log_file();
1218 }
1219 
1220 // ostream_exit() is called during normal VM exit to finish log files, flush
1221 // output and free resource.
1222 void ostream_exit() {
1223   static bool ostream_exit_called = false;
1224   if (ostream_exit_called)  return;
1225   ostream_exit_called = true;
1226 #if INCLUDE_CDS
1227   if (classlist_file != NULL) {
1228     delete classlist_file;
1229   }
1230 #endif
1231   if (gclog_or_tty != tty) {
1232       delete gclog_or_tty;
1233   }
1234   {
1235       // we temporaly disable PrintMallocFree here
1236       // as otherwise it'll lead to using of almost deleted
1237       // tty or defaultStream::instance in logging facility
1238       // of HeapFree(), see 6391258
1239       DEBUG_ONLY(FlagSetting fs(PrintMallocFree, false);)
1240       if (tty != defaultStream::instance) {
1241           delete tty;
1242       }
1243       if (defaultStream::instance != NULL) {
1244           delete defaultStream::instance;
1245       }
1246   }
1247   tty = NULL;
1248   xtty = NULL;
1249   gclog_or_tty = NULL;
1250   defaultStream::instance = NULL;
1251 }
1252 
1253 // ostream_abort() is called by os::abort() when VM is about to die.
1254 void ostream_abort() {
1255   // Here we can't delete gclog_or_tty and tty, just flush their output
1256   if (gclog_or_tty) gclog_or_tty->flush();
1257   if (tty) tty->flush();
1258 
1259   if (defaultStream::instance != NULL) {
1260     static char buf[4096];
1261     defaultStream::instance->finish_log_on_error(buf, sizeof(buf));
1262   }
1263 }
1264 
1265 staticBufferStream::staticBufferStream(char* buffer, size_t buflen,
1266                                        outputStream *outer_stream) {
1267   _buffer = buffer;
1268   _buflen = buflen;
1269   _outer_stream = outer_stream;
1270   // compile task prints time stamp relative to VM start
1271   _stamp.update_to(1);
1272 }
1273 
1274 void staticBufferStream::write(const char* c, size_t len) {
1275   _outer_stream->print_raw(c, (int)len);
1276 }
1277 
1278 void staticBufferStream::flush() {
1279   _outer_stream->flush();
1280 }
1281 
1282 void staticBufferStream::print(const char* format, ...) {
1283   va_list ap;
1284   va_start(ap, format);
1285   size_t len;
1286   const char* str = do_vsnprintf(_buffer, _buflen, format, ap, false, len);
1287   write(str, len);
1288   va_end(ap);
1289 }
1290 
1291 void staticBufferStream::print_cr(const char* format, ...) {
1292   va_list ap;
1293   va_start(ap, format);
1294   size_t len;
1295   const char* str = do_vsnprintf(_buffer, _buflen, format, ap, true, len);
1296   write(str, len);
1297   va_end(ap);
1298 }
1299 
1300 void staticBufferStream::vprint(const char *format, va_list argptr) {
1301   size_t len;
1302   const char* str = do_vsnprintf(_buffer, _buflen, format, argptr, false, len);
1303   write(str, len);
1304 }
1305 
1306 void staticBufferStream::vprint_cr(const char* format, va_list argptr) {
1307   size_t len;
1308   const char* str = do_vsnprintf(_buffer, _buflen, format, argptr, true, len);
1309   write(str, len);
1310 }
1311 
1312 bufferedStream::bufferedStream(size_t initial_size, size_t bufmax) : outputStream() {
1313   buffer_length = initial_size;
1314   buffer        = NEW_C_HEAP_ARRAY(char, buffer_length, mtInternal);
1315   buffer_pos    = 0;
1316   buffer_fixed  = false;
1317   buffer_max    = bufmax;
1318 }
1319 
1320 bufferedStream::bufferedStream(char* fixed_buffer, size_t fixed_buffer_size, size_t bufmax) : outputStream() {
1321   buffer_length = fixed_buffer_size;
1322   buffer        = fixed_buffer;
1323   buffer_pos    = 0;
1324   buffer_fixed  = true;
1325   buffer_max    = bufmax;
1326 }
1327 
1328 void bufferedStream::write(const char* s, size_t len) {
1329 
1330   if(buffer_pos + len > buffer_max) {
1331     flush();
1332   }
1333 
1334   size_t end = buffer_pos + len;
1335   if (end >= buffer_length) {
1336     if (buffer_fixed) {
1337       // if buffer cannot resize, silently truncate
1338       len = buffer_length - buffer_pos - 1;
1339     } else {
1340       // For small overruns, double the buffer.  For larger ones,
1341       // increase to the requested size.
1342       if (end < buffer_length * 2) {
1343         end = buffer_length * 2;
1344       }
1345       buffer = REALLOC_C_HEAP_ARRAY(char, buffer, end, mtInternal);
1346       buffer_length = end;
1347     }
1348   }
1349   memcpy(buffer + buffer_pos, s, len);
1350   buffer_pos += len;
1351   update_position(s, len);
1352 }
1353 
1354 char* bufferedStream::as_string() {
1355   char* copy = NEW_RESOURCE_ARRAY(char, buffer_pos+1);
1356   strncpy(copy, buffer, buffer_pos);
1357   copy[buffer_pos] = 0;  // terminating null
1358   return copy;
1359 }
1360 
1361 bufferedStream::~bufferedStream() {
1362   if (!buffer_fixed) {
1363     FREE_C_HEAP_ARRAY(char, buffer);
1364   }
1365 }
1366 
1367 #ifndef PRODUCT
1368 
1369 #if defined(SOLARIS) || defined(LINUX) || defined(AIX) || defined(_ALLBSD_SOURCE)
1370 #include <sys/types.h>
1371 #include <sys/socket.h>
1372 #include <netinet/in.h>
1373 #include <arpa/inet.h>
1374 #endif
1375 
1376 // Network access
1377 networkStream::networkStream() : bufferedStream(1024*10, 1024*10) {
1378 
1379   _socket = -1;
1380 
1381   int result = os::socket(AF_INET, SOCK_STREAM, 0);
1382   if (result <= 0) {
1383     assert(false, "Socket could not be created!");
1384   } else {
1385     _socket = result;
1386   }
1387 }
1388 
1389 int networkStream::read(char *buf, size_t len) {
1390   return os::recv(_socket, buf, (int)len, 0);
1391 }
1392 
1393 void networkStream::flush() {
1394   if (size() != 0) {
1395     int result = os::raw_send(_socket, (char *)base(), size(), 0);
1396     assert(result != -1, "connection error");
1397     assert(result == (int)size(), "didn't send enough data");
1398   }
1399   reset();
1400 }
1401 
1402 networkStream::~networkStream() {
1403   close();
1404 }
1405 
1406 void networkStream::close() {
1407   if (_socket != -1) {
1408     flush();
1409     os::socket_close(_socket);
1410     _socket = -1;
1411   }
1412 }
1413 
1414 bool networkStream::connect(const char *ip, short port) {
1415 
1416   struct sockaddr_in server;
1417   server.sin_family = AF_INET;
1418   server.sin_port = htons(port);
1419 
1420   server.sin_addr.s_addr = inet_addr(ip);
1421   if (server.sin_addr.s_addr == (uint32_t)-1) {
1422     struct hostent* host = os::get_host_by_name((char*)ip);
1423     if (host != NULL) {
1424       memcpy(&server.sin_addr, host->h_addr_list[0], host->h_length);
1425     } else {
1426       return false;
1427     }
1428   }
1429 
1430 
1431   int result = os::connect(_socket, (struct sockaddr*)&server, sizeof(struct sockaddr_in));
1432   return (result >= 0);
1433 }
1434 
1435 #endif
1436 
1437 void logStream::write(const char* s, size_t len) {
1438   if (len > 0 && s[len - 1] == '\n') {
1439     _current_line.write(s, len - 1);
1440     _log_func(_current_line.as_string());
1441     _current_line.reset();
1442   } else {
1443     _current_line.write(s, len);
1444   }
1445   update_position(s, len);
1446 }