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hotspot/src/share/vm/utilities/ostream.cpp

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+/*
+ * Copyright 1997-2007 Sun Microsystems, Inc.  All Rights Reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
+ * CA 95054 USA or visit www.sun.com if you need additional information or
+ * have any questions.
+ *
+ */
+
+# include "incls/_precompiled.incl"
+# include "incls/_ostream.cpp.incl"
+
+extern "C" void jio_print(const char* s); // Declarationtion of jvm method
+
+outputStream::outputStream(int width) {
+  _width       = width;
+  _position    = 0;
+  _newlines    = 0;
+  _precount    = 0;
+  _indentation = 0;
+}
+
+outputStream::outputStream(int width, bool has_time_stamps) {
+  _width       = width;
+  _position    = 0;
+  _newlines    = 0;
+  _precount    = 0;
+  _indentation = 0;
+  if (has_time_stamps)  _stamp.update();
+}
+
+void outputStream::update_position(const char* s, size_t len) {
+  for (size_t i = 0; i < len; i++) {
+    char ch = s[i];
+    if (ch == '\n') {
+      _newlines += 1;
+      _precount += _position + 1;
+      _position = 0;
+    } else if (ch == '\t') {
+      _position += 8;
+      _precount -= 7;  // invariant:  _precount + _position == total count
+    } else {
+      _position += 1;
+    }
+  }
+}
+
+// Execute a vsprintf, using the given buffer if necessary.
+// Return a pointer to the formatted string.
+const char* outputStream::do_vsnprintf(char* buffer, size_t buflen,
+                                       const char* format, va_list ap,
+                                       bool add_cr,
+                                       size_t& result_len) {
+  const char* result;
+  if (add_cr)  buflen--;
+  if (!strchr(format, '%')) {
+    // constant format string
+    result = format;
+    result_len = strlen(result);
+    if (add_cr && result_len >= buflen)  result_len = buflen-1;  // truncate
+  } else if (format[0] == '%' && format[1] == 's' && format[2] == '\0') {
+    // trivial copy-through format string
+    result = va_arg(ap, const char*);
+    result_len = strlen(result);
+    if (add_cr && result_len >= buflen)  result_len = buflen-1;  // truncate
+  } else if (vsnprintf(buffer, buflen, format, ap) >= 0) {
+    result = buffer;
+    result_len = strlen(result);
+  } else {
+    DEBUG_ONLY(warning("increase O_BUFLEN in ostream.hpp -- output truncated");)
+    result = buffer;
+    result_len = buflen - 1;
+    buffer[result_len] = 0;
+  }
+  if (add_cr) {
+    if (result != buffer) {
+      strncpy(buffer, result, buflen);
+      result = buffer;
+    }
+    buffer[result_len++] = '\n';
+    buffer[result_len] = 0;
+  }
+  return result;
+}
+
+void outputStream::print(const char* format, ...) {
+  char buffer[O_BUFLEN];
+  va_list ap;
+  va_start(ap, format);
+  size_t len;
+  const char* str = do_vsnprintf(buffer, O_BUFLEN, format, ap, false, len);
+  write(str, len);
+  va_end(ap);
+}
+
+void outputStream::print_cr(const char* format, ...) {
+  char buffer[O_BUFLEN];
+  va_list ap;
+  va_start(ap, format);
+  size_t len;
+  const char* str = do_vsnprintf(buffer, O_BUFLEN, format, ap, true, len);
+  write(str, len);
+  va_end(ap);
+}
+
+void outputStream::vprint(const char *format, va_list argptr) {
+  char buffer[O_BUFLEN];
+  size_t len;
+  const char* str = do_vsnprintf(buffer, O_BUFLEN, format, argptr, false, len);
+  write(str, len);
+}
+
+void outputStream::vprint_cr(const char* format, va_list argptr) {
+  char buffer[O_BUFLEN];
+  size_t len;
+  const char* str = do_vsnprintf(buffer, O_BUFLEN, format, argptr, true, len);
+  write(str, len);
+}
+
+void outputStream::fill_to(int col) {
+  while (position() < col) sp();
+}
+
+void outputStream::put(char ch) {
+  assert(ch != 0, "please fix call site");
+  char buf[] = { ch, '\0' };
+  write(buf, 1);
+}
+
+void outputStream::sp() {
+  this->write(" ", 1);
+}
+
+void outputStream::cr() {
+  this->write("\n", 1);
+}
+
+void outputStream::stamp() {
+  if (! _stamp.is_updated()) {
+    _stamp.update(); // start at 0 on first call to stamp()
+  }
+
+  // outputStream::stamp() may get called by ostream_abort(), use snprintf
+  // to avoid allocating large stack buffer in print().
+  char buf[40];
+  jio_snprintf(buf, sizeof(buf), "%.3f", _stamp.seconds());
+  print_raw(buf);
+}
+
+void outputStream::date_stamp(bool guard,
+                              const char* prefix,
+                              const char* suffix) {
+  if (!guard) {
+    return;
+  }
+  print_raw(prefix);
+  static const char error_time[] = "yyyy-mm-ddThh:mm:ss.mmm+zzzz";
+  static const int buffer_length = 32;
+  char buffer[buffer_length];
+  const char* iso8601_result = os::iso8601_time(buffer, buffer_length);
+  if (iso8601_result != NULL) {
+    print_raw(buffer);
+  } else {
+    print_raw(error_time);
+  }
+  print_raw(suffix);
+  return;
+}
+
+void outputStream::indent() {
+  while (_position < _indentation) sp();
+}
+
+void outputStream::print_jlong(jlong value) {
+  // N.B. Same as INT64_FORMAT
+  print(os::jlong_format_specifier(), value);
+}
+
+void outputStream::print_julong(julong value) {
+  // N.B. Same as UINT64_FORMAT
+  print(os::julong_format_specifier(), value);
+}
+
+stringStream::stringStream(size_t initial_size) : outputStream() {
+  buffer_length = initial_size;
+  buffer        = NEW_RESOURCE_ARRAY(char, buffer_length);
+  buffer_pos    = 0;
+  buffer_fixed  = false;
+}
+
+// useful for output to fixed chunks of memory, such as performance counters
+stringStream::stringStream(char* fixed_buffer, size_t fixed_buffer_size) : outputStream() {
+  buffer_length = fixed_buffer_size;
+  buffer        = fixed_buffer;
+  buffer_pos    = 0;
+  buffer_fixed  = true;
+}
+
+void stringStream::write(const char* s, size_t len) {
+  size_t write_len = len;               // number of non-null bytes to write
+  size_t end = buffer_pos + len + 1;    // position after write and final '\0'
+  if (end > buffer_length) {
+    if (buffer_fixed) {
+      // if buffer cannot resize, silently truncate
+      end = buffer_length;
+      write_len = end - buffer_pos - 1; // leave room for the final '\0'
+    } else {
+      // For small overruns, double the buffer.  For larger ones,
+      // increase to the requested size.
+      if (end < buffer_length * 2) {
+        end = buffer_length * 2;
+      }
+      char* oldbuf = buffer;
+      buffer = NEW_RESOURCE_ARRAY(char, end);
+      strncpy(buffer, oldbuf, buffer_pos);
+      buffer_length = end;
+    }
+  }
+  // invariant: buffer is always null-terminated
+  guarantee(buffer_pos + write_len + 1 <= buffer_length, "stringStream oob");
+  buffer[buffer_pos + write_len] = 0;
+  strncpy(buffer + buffer_pos, s, write_len);
+  buffer_pos += write_len;
+
+  // Note that the following does not depend on write_len.
+  // This means that position and count get updated
+  // even when overflow occurs.
+  update_position(s, len);
+}
+
+char* stringStream::as_string() {
+  char* copy = NEW_RESOURCE_ARRAY(char, buffer_pos+1);
+  strncpy(copy, buffer, buffer_pos);
+  copy[buffer_pos] = 0;  // terminating null
+  return copy;
+}
+
+stringStream::~stringStream() {}
+
+xmlStream*   xtty;
+outputStream* tty;
+outputStream* gclog_or_tty;
+extern Mutex* tty_lock;
+
+fileStream::fileStream(const char* file_name) {
+  _file = fopen(file_name, "w");
+  _need_close = true;
+}
+
+void fileStream::write(const char* s, size_t len) {
+  if (_file != NULL)  fwrite(s, 1, len, _file);
+  update_position(s, len);
+}
+
+fileStream::~fileStream() {
+  if (_file != NULL) {
+    if (_need_close) fclose(_file);
+    _file = NULL;
+  }
+}
+
+void fileStream::flush() {
+  fflush(_file);
+}
+
+fdStream::fdStream(const char* file_name) {
+  _fd = open(file_name, O_WRONLY | O_CREAT | O_TRUNC, 0666);
+  _need_close = true;
+}
+
+fdStream::~fdStream() {
+  if (_fd != -1) {
+    if (_need_close) close(_fd);
+    _fd = -1;
+  }
+}
+
+void fdStream::write(const char* s, size_t len) {
+  if (_fd != -1) ::write(_fd, s, (int)len);
+  update_position(s, len);
+}
+
+defaultStream* defaultStream::instance = NULL;
+int defaultStream::_output_fd = 1;
+int defaultStream::_error_fd  = 2;
+FILE* defaultStream::_output_stream = stdout;
+FILE* defaultStream::_error_stream  = stderr;
+
+#define LOG_MAJOR_VERSION 160
+#define LOG_MINOR_VERSION 1
+
+void defaultStream::init() {
+  _inited = true;
+  if (LogVMOutput || LogCompilation) {
+    init_log();
+  }
+}
+
+bool defaultStream::has_log_file() {
+  // lazily create log file (at startup, LogVMOutput is false even
+  // if +LogVMOutput is used, because the flags haven't been parsed yet)
+  // For safer printing during fatal error handling, do not init logfile
+  // if a VM error has been reported.
+  if (!_inited && !is_error_reported())  init();
+  return _log_file != NULL;
+}
+
+static const char* make_log_name(const char* log_name, const char* force_directory, char* buf) {
+  const char* basename = log_name;
+  char file_sep = os::file_separator()[0];
+  const char* cp;
+  for (cp = log_name; *cp != '\0'; cp++) {
+    if (*cp == '/' || *cp == file_sep) {
+      basename = cp+1;
+    }
+  }
+  const char* nametail = log_name;
+
+  strcpy(buf, "");
+  if (force_directory != NULL) {
+    strcat(buf, force_directory);
+    strcat(buf, os::file_separator());
+    nametail = basename;       // completely skip directory prefix
+  }
+
+  const char* star = strchr(basename, '*');
+  int star_pos = (star == NULL) ? -1 : (star - nametail);
+
+  if (star_pos >= 0) {
+    // convert foo*bar.log to foo123bar.log
+    int buf_pos = (int) strlen(buf);
+    strncpy(&buf[buf_pos], nametail, star_pos);
+    sprintf(&buf[buf_pos + star_pos], "%u", os::current_process_id());
+    nametail += star_pos + 1;  // skip prefix and star
+  }
+
+  strcat(buf, nametail);      // append rest of name, or all of name
+  return buf;
+}
+
+void defaultStream::init_log() {
+  // %%% Need a MutexLocker?
+  const char* log_name = LogFile != NULL ? LogFile : "hotspot.log";
+  char buf[O_BUFLEN*2];
+  const char* try_name = make_log_name(log_name, NULL, buf);
+  fileStream* file = new(ResourceObj::C_HEAP) fileStream(try_name);
+  if (!file->is_open()) {
+    // Try again to open the file.
+    char warnbuf[O_BUFLEN*2];
+    sprintf(warnbuf, "Warning:  Cannot open log file: %s\n", try_name);
+    // Note:  This feature is for maintainer use only.  No need for L10N.
+    jio_print(warnbuf);
+    try_name = make_log_name("hs_pid*.log", os::get_temp_directory(), buf);
+    sprintf(warnbuf, "Warning:  Forcing option -XX:LogFile=%s\n", try_name);
+    jio_print(warnbuf);
+    delete file;
+    file = new(ResourceObj::C_HEAP) fileStream(try_name);
+  }
+  if (file->is_open()) {
+    _log_file = file;
+    xmlStream* xs = new(ResourceObj::C_HEAP) xmlStream(file);
+    _outer_xmlStream = xs;
+    if (this == tty)  xtty = xs;
+    // Write XML header.
+    xs->print_cr("<?xml version='1.0' encoding='UTF-8'?>");
+    // (For now, don't bother to issue a DTD for this private format.)
+    jlong time_ms = os::javaTimeMillis() - tty->time_stamp().milliseconds();
+    // %%% Should be: jlong time_ms = os::start_time_milliseconds(), if
+    // we ever get round to introduce that method on the os class
+    xs->head("hotspot_log version='%d %d'"
+             " process='%d' time_ms='"INT64_FORMAT"'",
+             LOG_MAJOR_VERSION, LOG_MINOR_VERSION,
+             os::current_process_id(), time_ms);
+    // Write VM version header immediately.
+    xs->head("vm_version");
+    xs->head("name"); xs->text("%s", VM_Version::vm_name()); xs->cr();
+    xs->tail("name");
+    xs->head("release"); xs->text("%s", VM_Version::vm_release()); xs->cr();
+    xs->tail("release");
+    xs->head("info"); xs->text("%s", VM_Version::internal_vm_info_string()); xs->cr();
+    xs->tail("info");
+    xs->tail("vm_version");
+    // Record information about the command-line invocation.
+    xs->head("vm_arguments");  // Cf. Arguments::print_on()
+    if (Arguments::num_jvm_flags() > 0) {
+      xs->head("flags");
+      Arguments::print_jvm_flags_on(xs->text());
+      xs->tail("flags");
+    }
+    if (Arguments::num_jvm_args() > 0) {
+      xs->head("args");
+      Arguments::print_jvm_args_on(xs->text());
+      xs->tail("args");
+    }
+    if (Arguments::java_command() != NULL) {
+      xs->head("command"); xs->text()->print_cr("%s", Arguments::java_command());
+      xs->tail("command");
+    }
+    if (Arguments::sun_java_launcher() != NULL) {
+      xs->head("launcher"); xs->text()->print_cr("%s", Arguments::sun_java_launcher());
+      xs->tail("launcher");
+    }
+    if (Arguments::system_properties() !=  NULL) {
+      xs->head("properties");
+      // Print it as a java-style property list.
+      // System properties don't generally contain newlines, so don't bother with unparsing.
+      for (SystemProperty* p = Arguments::system_properties(); p != NULL; p = p->next()) {
+        xs->text()->print_cr("%s=%s", p->key(), p->value());
+      }
+      xs->tail("properties");
+    }
+    xs->tail("vm_arguments");
+    // tty output per se is grouped under the <tty>...</tty> element.
+    xs->head("tty");
+    // All further non-markup text gets copied to the tty:
+    xs->_text = this;  // requires friend declaration!
+  } else {
+    delete(file);
+    // and leave xtty as NULL
+    LogVMOutput = false;
+    DisplayVMOutput = true;
+    LogCompilation = false;
+  }
+}
+
+// finish_log() is called during normal VM shutdown. finish_log_on_error() is
+// called by ostream_abort() after a fatal error.
+//
+void defaultStream::finish_log() {
+  xmlStream* xs = _outer_xmlStream;
+  xs->done("tty");
+
+  // Other log forks are appended here, at the End of Time:
+  CompileLog::finish_log(xs->out());  // write compile logging, if any, now
+
+  xs->done("hotspot_log");
+  xs->flush();
+
+  fileStream* file = _log_file;
+  _log_file = NULL;
+
+  delete _outer_xmlStream;
+  _outer_xmlStream = NULL;
+
+  file->flush();
+  delete file;
+}
+
+void defaultStream::finish_log_on_error(char *buf, int buflen) {
+  xmlStream* xs = _outer_xmlStream;
+
+  if (xs && xs->out()) {
+
+    xs->done_raw("tty");
+
+    // Other log forks are appended here, at the End of Time:
+    CompileLog::finish_log_on_error(xs->out(), buf, buflen);  // write compile logging, if any, now
+
+    xs->done_raw("hotspot_log");
+    xs->flush();
+
+    fileStream* file = _log_file;
+    _log_file = NULL;
+    _outer_xmlStream = NULL;
+
+    if (file) {
+      file->flush();
+
+      // Can't delete or close the file because delete and fclose aren't
+      // async-safe. We are about to die, so leave it to the kernel.
+      // delete file;
+    }
+  }
+}
+
+intx defaultStream::hold(intx writer_id) {
+  bool has_log = has_log_file();  // check before locking
+  if (// impossible, but who knows?
+      writer_id == NO_WRITER ||
+
+      // bootstrap problem
+      tty_lock == NULL ||
+
+      // can't grab a lock or call Thread::current() if TLS isn't initialized
+      ThreadLocalStorage::thread() == NULL ||
+
+      // developer hook
+      !SerializeVMOutput ||
+
+      // VM already unhealthy
+      is_error_reported() ||
+
+      // safepoint == global lock (for VM only)
+      (SafepointSynchronize::is_synchronizing() &&
+       Thread::current()->is_VM_thread())
+      ) {
+    // do not attempt to lock unless we know the thread and the VM is healthy
+    return NO_WRITER;
+  }
+  if (_writer == writer_id) {
+    // already held, no need to re-grab the lock
+    return NO_WRITER;
+  }
+  tty_lock->lock_without_safepoint_check();
+  // got the lock
+  if (writer_id != _last_writer) {
+    if (has_log) {
+      _log_file->bol();
+      // output a hint where this output is coming from:
+      _log_file->print_cr("<writer thread='"INTX_FORMAT"'/>", writer_id);
+    }
+    _last_writer = writer_id;
+  }
+  _writer = writer_id;
+  return writer_id;
+}
+
+void defaultStream::release(intx holder) {
+  if (holder == NO_WRITER) {
+    // nothing to release:  either a recursive lock, or we scribbled (too bad)
+    return;
+  }
+  if (_writer != holder) {
+    return;  // already unlocked, perhaps via break_tty_lock_for_safepoint
+  }
+  _writer = NO_WRITER;
+  tty_lock->unlock();
+}
+
+
+// Yuck:  jio_print does not accept char*/len.
+static void call_jio_print(const char* s, size_t len) {
+  char buffer[O_BUFLEN+100];
+  if (len > sizeof(buffer)-1) {
+    warning("increase O_BUFLEN in ostream.cpp -- output truncated");
+    len = sizeof(buffer)-1;
+  }
+  strncpy(buffer, s, len);
+  buffer[len] = '\0';
+  jio_print(buffer);
+}
+
+
+void defaultStream::write(const char* s, size_t len) {
+  intx thread_id = os::current_thread_id();
+  intx holder = hold(thread_id);
+
+  if (DisplayVMOutput &&
+      (_outer_xmlStream == NULL || !_outer_xmlStream->inside_attrs())) {
+    // print to output stream. It can be redirected by a vfprintf hook
+    if (s[len] == '\0') {
+      jio_print(s);
+    } else {
+      call_jio_print(s, len);
+    }
+  }
+
+  // print to log file
+  if (has_log_file()) {
+    int nl0 = _newlines;
+    xmlTextStream::write(s, len);
+    // flush the log file too, if there were any newlines
+    if (nl0 != _newlines){
+      flush();
+    }
+  } else {
+    update_position(s, len);
+  }
+
+  release(holder);
+}
+
+intx ttyLocker::hold_tty() {
+  if (defaultStream::instance == NULL)  return defaultStream::NO_WRITER;
+  intx thread_id = os::current_thread_id();
+  return defaultStream::instance->hold(thread_id);
+}
+
+void ttyLocker::release_tty(intx holder) {
+  if (holder == defaultStream::NO_WRITER)  return;
+  defaultStream::instance->release(holder);
+}
+
+void ttyLocker::break_tty_lock_for_safepoint(intx holder) {
+  if (defaultStream::instance != NULL &&
+      defaultStream::instance->writer() == holder) {
+    if (xtty != NULL) {
+      xtty->print_cr("<!-- safepoint while printing -->");
+    }
+    defaultStream::instance->release(holder);
+  }
+  // (else there was no lock to break)
+}
+
+void ostream_init() {
+  if (defaultStream::instance == NULL) {
+    defaultStream::instance = new(ResourceObj::C_HEAP) defaultStream();
+    tty = defaultStream::instance;
+
+    // We want to ensure that time stamps in GC logs consider time 0
+    // the time when the JVM is initialized, not the first time we ask
+    // for a time stamp. So, here, we explicitly update the time stamp
+    // of tty.
+    tty->time_stamp().update_to(1);
+  }
+}
+
+void ostream_init_log() {
+  // For -Xloggc:<file> option - called in runtime/thread.cpp
+  // Note : this must be called AFTER ostream_init()
+
+  gclog_or_tty = tty; // default to tty
+  if (Arguments::gc_log_filename() != NULL) {
+    fileStream * gclog = new(ResourceObj::C_HEAP)
+                           fileStream(Arguments::gc_log_filename());
+    if (gclog->is_open()) {
+      // now we update the time stamp of the GC log to be synced up
+      // with tty.
+      gclog->time_stamp().update_to(tty->time_stamp().ticks());
+      gclog_or_tty = gclog;
+    }
+  }
+
+  // If we haven't lazily initialized the logfile yet, do it now,
+  // to avoid the possibility of lazy initialization during a VM
+  // crash, which can affect the stability of the fatal error handler.
+  defaultStream::instance->has_log_file();
+}
+
+// ostream_exit() is called during normal VM exit to finish log files, flush
+// output and free resource.
+void ostream_exit() {
+  static bool ostream_exit_called = false;
+  if (ostream_exit_called)  return;
+  ostream_exit_called = true;
+  if (gclog_or_tty != tty) {
+      delete gclog_or_tty;
+  }
+  {
+      // we temporaly disable PrintMallocFree here
+      // as otherwise it'll lead to using of almost deleted
+      // tty or defaultStream::instance in logging facility
+      // of HeapFree(), see 6391258
+      DEBUG_ONLY(FlagSetting fs(PrintMallocFree, false);)
+      if (tty != defaultStream::instance) {
+          delete tty;
+      }
+      if (defaultStream::instance != NULL) {
+          delete defaultStream::instance;
+      }
+  }
+  tty = NULL;
+  xtty = NULL;
+  gclog_or_tty = NULL;
+  defaultStream::instance = NULL;
+}
+
+// ostream_abort() is called by os::abort() when VM is about to die.
+void ostream_abort() {
+  // Here we can't delete gclog_or_tty and tty, just flush their output
+  if (gclog_or_tty) gclog_or_tty->flush();
+  if (tty) tty->flush();
+
+  if (defaultStream::instance != NULL) {
+    static char buf[4096];
+    defaultStream::instance->finish_log_on_error(buf, sizeof(buf));
+  }
+}
+
+staticBufferStream::staticBufferStream(char* buffer, size_t buflen,
+                                       outputStream *outer_stream) {
+  _buffer = buffer;
+  _buflen = buflen;
+  _outer_stream = outer_stream;
+}
+
+void staticBufferStream::write(const char* c, size_t len) {
+  _outer_stream->print_raw(c, (int)len);
+}
+
+void staticBufferStream::flush() {
+  _outer_stream->flush();
+}
+
+void staticBufferStream::print(const char* format, ...) {
+  va_list ap;
+  va_start(ap, format);
+  size_t len;
+  const char* str = do_vsnprintf(_buffer, _buflen, format, ap, false, len);
+  write(str, len);
+  va_end(ap);
+}
+
+void staticBufferStream::print_cr(const char* format, ...) {
+  va_list ap;
+  va_start(ap, format);
+  size_t len;
+  const char* str = do_vsnprintf(_buffer, _buflen, format, ap, true, len);
+  write(str, len);
+  va_end(ap);
+}
+
+void staticBufferStream::vprint(const char *format, va_list argptr) {
+  size_t len;
+  const char* str = do_vsnprintf(_buffer, _buflen, format, argptr, false, len);
+  write(str, len);
+}
+
+void staticBufferStream::vprint_cr(const char* format, va_list argptr) {
+  size_t len;
+  const char* str = do_vsnprintf(_buffer, _buflen, format, argptr, true, len);
+  write(str, len);
+}
+
+bufferedStream::bufferedStream(size_t initial_size) : outputStream() {
+  buffer_length = initial_size;
+  buffer        = NEW_C_HEAP_ARRAY(char, buffer_length);
+  buffer_pos    = 0;
+  buffer_fixed  = false;
+}
+
+bufferedStream::bufferedStream(char* fixed_buffer, size_t fixed_buffer_size) : outputStream() {
+  buffer_length = fixed_buffer_size;
+  buffer        = fixed_buffer;
+  buffer_pos    = 0;
+  buffer_fixed  = true;
+}
+
+void bufferedStream::write(const char* s, size_t len) {
+  size_t end = buffer_pos + len;
+  if (end >= buffer_length) {
+    if (buffer_fixed) {
+      // if buffer cannot resize, silently truncate
+      len = buffer_length - buffer_pos - 1;
+    } else {
+      // For small overruns, double the buffer.  For larger ones,
+      // increase to the requested size.
+      if (end < buffer_length * 2) {
+        end = buffer_length * 2;
+      }
+      buffer = REALLOC_C_HEAP_ARRAY(char, buffer, end);
+      buffer_length = end;
+    }
+  }
+  memcpy(buffer + buffer_pos, s, len);
+  buffer_pos += len;
+  update_position(s, len);
+}
+
+char* bufferedStream::as_string() {
+  char* copy = NEW_RESOURCE_ARRAY(char, buffer_pos+1);
+  strncpy(copy, buffer, buffer_pos);
+  copy[buffer_pos] = 0;  // terminating null
+  return copy;
+}
+
+bufferedStream::~bufferedStream() {
+  if (!buffer_fixed) {
+    FREE_C_HEAP_ARRAY(char, buffer);
+  }
+}
+
+#ifndef PRODUCT
+
+#if defined(SOLARIS) || defined(LINUX)
+#include <sys/types.h>
+#include <sys/socket.h>
+#include <netinet/in.h>
+#include <arpa/inet.h>
+#endif
+
+// Network access
+networkStream::networkStream() {
+
+  _socket = -1;
+
+  hpi::initialize_socket_library();
+
+  int result = hpi::socket(AF_INET, SOCK_STREAM, 0);
+  if (result <= 0) {
+    assert(false, "Socket could not be created!");
+  } else {
+    _socket = result;
+  }
+}
+
+int networkStream::read(char *buf, size_t len) {
+  return hpi::recv(_socket, buf, (int)len, 0);
+}
+
+void networkStream::flush() {
+  if (size() != 0) {
+    hpi::send(_socket, (char *)base(), (int)size(), 0);
+  }
+  reset();
+}
+
+networkStream::~networkStream() {
+  close();
+}
+
+void networkStream::close() {
+  if (_socket != -1) {
+    flush();
+    hpi::socket_close(_socket);
+    _socket = -1;
+  }
+}
+
+bool networkStream::connect(const char *ip, short port) {
+
+  struct sockaddr_in server;
+  server.sin_family = AF_INET;
+  server.sin_port = htons(port);
+
+  server.sin_addr.s_addr = inet_addr(ip);
+  if (server.sin_addr.s_addr == (unsigned long)-1) {
+#ifdef _WINDOWS
+    struct hostent* host = hpi::get_host_by_name((char*)ip);
+#else
+    struct hostent* host = gethostbyname(ip);
+#endif
+    if (host != NULL) {
+      memcpy(&server.sin_addr, host->h_addr_list[0], host->h_length);
+    } else {
+      return false;
+    }
+  }
+
+
+  int result = hpi::connect(_socket, (struct sockaddr*)&server, sizeof(struct sockaddr_in));
+  return (result >= 0);
+}
+
+#endif