jdk8-mips64-public/hotspot: src/share/vm/utilities/ostream.cpp@624a0741915c (annotated)

src/share/vm/utilities/ostream.cpp@624a0741915c (annotated)

src/share/vm/utilities/ostream.cpp

Thu, 04 Apr 2019 17:56:29 +0800

author: aoqi
date: Thu, 04 Apr 2019 17:56:29 +0800
changeset 9572: 624a0741915c
parent 9478: f3108e56b502
parent 9448: 73d689add964
child 9931: fd44df5e3bc3
permissions: -rw-r--r--

Merge

 /*
  * Copyright (c) 1997, 2018, Oracle and/or its affiliates. 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 Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  * or visit www.oracle.com if you need additional information or have any
  * questions.
  *
  */
 #include "precompiled.hpp"
 #include "compiler/compileLog.hpp"
 #include "gc_implementation/shared/gcId.hpp"
 #include "oops/oop.inline.hpp"
 #include "runtime/arguments.hpp"
 #include "runtime/os.hpp"
 #include "utilities/defaultStream.hpp"
 #include "utilities/ostream.hpp"
 #include "utilities/top.hpp"
 #include "utilities/xmlstream.hpp"
 #ifdef TARGET_OS_FAMILY_linux
 # include "os_linux.inline.hpp"
 #endif
 #ifdef TARGET_OS_FAMILY_solaris
 # include "os_solaris.inline.hpp"
 #endif
 #ifdef TARGET_OS_FAMILY_windows
 # include "os_windows.inline.hpp"
 #endif
 #ifdef TARGET_OS_FAMILY_aix
 # include "os_aix.inline.hpp"
 #endif
 #ifdef TARGET_OS_FAMILY_bsd
 # include "os_bsd.inline.hpp"
 #endif
 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') {
       int tw = 8 - (_position & 7);
       _position += tw;
       _precount -= tw-1;  // 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) {
   assert(buflen >= 2, "buffer too small");
   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 {
     int written = os::vsnprintf(buffer, buflen, format, ap);
     assert(written >= 0, "vsnprintf encoding error");
     result = buffer;
     if ((size_t)written < buflen) {
       result_len = written;
     } else {
       DEBUG_ONLY(warning("increase O_BUFLEN in ostream.hpp -- output truncated");)
       result_len = buflen - 1;
     }
   }
   if (add_cr) {
     if (result != buffer) {
       memcpy(buffer, result, result_len);
       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) {
   int need_fill = col - position();
   sp(need_fill);
 }
 void outputStream::move_to(int col, int slop, int min_space) {
   if (position() >= col + slop)
     cr();
   int need_fill = col - position();
   if (need_fill < min_space)
     need_fill = min_space;
   sp(need_fill);
 }
 void outputStream::put(char ch) {
   assert(ch != 0, "please fix call site");
   char buf[] = { ch, '\0' };
   write(buf, 1);
 }
 #define SP_USE_TABS false
 void outputStream::sp(int count) {
   if (count < 0)  return;
   if (SP_USE_TABS && count >= 8) {
     int target = position() + count;
     while (count >= 8) {
       this->write("\t", 1);
       count -= 8;
     }
     count = target - position();
   }
   while (count > 0) {
     int nw = (count > 8) ? 8 : count;
     this->write("        ", nw);
     count -= nw;
   }
 }
 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::stamp(bool guard,
                          const char* prefix,
                          const char* suffix) {
   if (!guard) {
     return;
   }
   print_raw(prefix);
   stamp();
   print_raw(suffix);
 }
 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::gclog_stamp(const GCId& gc_id) {
   date_stamp(PrintGCDateStamps);
   stamp(PrintGCTimeStamps);
   if (PrintGCID) {
     print("#%u: ", gc_id.id());
   }
 }
 outputStream& outputStream::indent() {
   while (_position < _indentation) sp();
   return *this;
 }
 void outputStream::print_jlong(jlong value) {
   print(JLONG_FORMAT, value);
 }
 void outputStream::print_julong(julong value) {
   print(JULONG_FORMAT, value);
 }
 /**
  * This prints out hex data in a 'windbg' or 'xxd' form, where each line is:
  *   <hex-address>: 8 * <hex-halfword> <ascii translation (optional)>
  * example:
  * 0000000: 7f44 4f46 0102 0102 0000 0000 0000 0000  .DOF............
  * 0000010: 0000 0000 0000 0040 0000 0020 0000 0005  .......@... ....
  * 0000020: 0000 0000 0000 0040 0000 0000 0000 015d  .......@.......]
  * ...
  *
  * indent is applied to each line.  Ends with a CR.
  */
 void outputStream::print_data(void* data, size_t len, bool with_ascii) {
   size_t limit = (len + 16) / 16 * 16;
   for (size_t i = 0; i < limit; ++i) {
     if (i % 16 == 0) {
       indent().print(SIZE_FORMAT_HEX_W(07) ":", i);
     }
     if (i % 2 == 0) {
       print(" ");
     }
     if (i < len) {
       print("%02x", ((unsigned char*)data)[i]);
     } else {
       print("  ");
     }
     if ((i + 1) % 16 == 0) {
       if (with_ascii) {
         print("  ");
         for (size_t j = 0; j < 16; ++j) {
           size_t idx = i + j - 15;
           if (idx < len) {
             char c = ((char*)data)[idx];
             print("%c", c >= 32 && c <= 126 ? c : '.');
           }
         }
       }
       cr();
     }
   }
 }
 stringStream::stringStream(size_t initial_size) : outputStream() {
   buffer_length = initial_size;
   buffer        = NEW_RESOURCE_ARRAY(char, buffer_length);
   buffer_pos    = 0;
   buffer_fixed  = false;
   DEBUG_ONLY(rm = Thread::current()->current_resource_mark();)
 }
 // 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;
       assert(rm == NULL || Thread::current()->current_resource_mark() == rm,
              "stringStream is re-allocated with a different ResourceMark");
       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;
 CDS_ONLY(fileStream* classlist_file;) // Only dump the classes that can be stored into the CDS archive
 extern Mutex* tty_lock;
 #define EXTRACHARLEN   32
 #define CURRENTAPPX    ".current"
 // convert YYYY-MM-DD HH:MM:SS to YYYY-MM-DD_HH-MM-SS
 char* get_datetime_string(char *buf, size_t len) {
   os::local_time_string(buf, len);
   int i = (int)strlen(buf);
   while (i-- >= 0) {
     if (buf[i] == ' ') buf[i] = '_';
     else if (buf[i] == ':') buf[i] = '-';
   }
   return buf;
 }
 static const char* make_log_name_internal(const char* log_name, const char* force_directory,
                                                 int pid, const char* tms) {
   const char* basename = log_name;
   char file_sep = os::file_separator()[0];
   const char* cp;
   char  pid_text[32];
   for (cp = log_name; *cp != '\0'; cp++) {
     if (*cp == '/' || *cp == file_sep) {
       basename = cp + 1;
     }
   }
   const char* nametail = log_name;
   // Compute buffer length
   size_t buffer_length;
   if (force_directory != NULL) {
     buffer_length = strlen(force_directory) + strlen(os::file_separator()) +
                     strlen(basename) + 1;
   } else {
     buffer_length = strlen(log_name) + 1;
   }
   const char* pts = strstr(basename, "%p");
   int pid_pos = (pts == NULL) ? -1 : (pts - nametail);
   if (pid_pos >= 0) {
     jio_snprintf(pid_text, sizeof(pid_text), "pid%u", pid);
     buffer_length += strlen(pid_text);
   }
   pts = strstr(basename, "%t");
   int tms_pos = (pts == NULL) ? -1 : (pts - nametail);
   if (tms_pos >= 0) {
     buffer_length += strlen(tms);
   }
   // File name is too long.
   if (buffer_length > JVM_MAXPATHLEN) {
     return NULL;
   }
   // Create big enough buffer.
   char *buf = NEW_C_HEAP_ARRAY(char, buffer_length, mtInternal);
   strcpy(buf, "");
   if (force_directory != NULL) {
     strcat(buf, force_directory);
     strcat(buf, os::file_separator());
     nametail = basename;       // completely skip directory prefix
   }
   // who is first, %p or %t?
   int first = -1, second = -1;
   const char *p1st = NULL;
   const char *p2nd = NULL;
   if (pid_pos >= 0 && tms_pos >= 0) {
     // contains both %p and %t
     if (pid_pos < tms_pos) {
       // case foo%pbar%tmonkey.log
       first  = pid_pos;
       p1st   = pid_text;
       second = tms_pos;
       p2nd   = tms;
     } else {
       // case foo%tbar%pmonkey.log
       first  = tms_pos;
       p1st   = tms;
       second = pid_pos;
       p2nd   = pid_text;
     }
   } else if (pid_pos >= 0) {
     // contains %p only
     first  = pid_pos;
     p1st   = pid_text;
   } else if (tms_pos >= 0) {
     // contains %t only
     first  = tms_pos;
     p1st   = tms;
   }
   int buf_pos = (int)strlen(buf);
   const char* tail = nametail;
   if (first >= 0) {
     tail = nametail + first + 2;
     strncpy(&buf[buf_pos], nametail, first);
     strcpy(&buf[buf_pos + first], p1st);
     buf_pos = (int)strlen(buf);
     if (second >= 0) {
       strncpy(&buf[buf_pos], tail, second - first - 2);
       strcpy(&buf[buf_pos + second - first - 2], p2nd);
       tail = nametail + second + 2;
     }
   }
   strcat(buf, tail);      // append rest of name, or all of name
   return buf;
 }
 // log_name comes from -XX:LogFile=log_name, -Xloggc:log_name or
 // -XX:DumpLoadedClassList=<file_name>
 // in log_name, %p => pid1234 and
 //              %t => YYYY-MM-DD_HH-MM-SS
 static const char* make_log_name(const char* log_name, const char* force_directory) {
   char timestr[32];
   get_datetime_string(timestr, sizeof(timestr));
   return make_log_name_internal(log_name, force_directory, os::current_process_id(),
                                 timestr);
 }
 #ifndef PRODUCT
 void test_loggc_filename() {
   int pid;
   char  tms[32];
   char  i_result[JVM_MAXPATHLEN];
   const char* o_result;
   get_datetime_string(tms, sizeof(tms));
   pid = os::current_process_id();
   // test.log
   jio_snprintf(i_result, JVM_MAXPATHLEN, "test.log", tms);
   o_result = make_log_name_internal("test.log", NULL, pid, tms);
   assert(strcmp(i_result, o_result) == 0, "failed on testing make_log_name(\"test.log\", NULL)");
   FREE_C_HEAP_ARRAY(char, o_result, mtInternal);
   // test-%t-%p.log
   jio_snprintf(i_result, JVM_MAXPATHLEN, "test-%s-pid%u.log", tms, pid);
   o_result = make_log_name_internal("test-%t-%p.log", NULL, pid, tms);
   assert(strcmp(i_result, o_result) == 0, "failed on testing make_log_name(\"test-%%t-%%p.log\", NULL)");
   FREE_C_HEAP_ARRAY(char, o_result, mtInternal);
   // test-%t%p.log
   jio_snprintf(i_result, JVM_MAXPATHLEN, "test-%spid%u.log", tms, pid);
   o_result = make_log_name_internal("test-%t%p.log", NULL, pid, tms);
   assert(strcmp(i_result, o_result) == 0, "failed on testing make_log_name(\"test-%%t%%p.log\", NULL)");
   FREE_C_HEAP_ARRAY(char, o_result, mtInternal);
   // %p%t.log
   jio_snprintf(i_result, JVM_MAXPATHLEN, "pid%u%s.log", pid, tms);
   o_result = make_log_name_internal("%p%t.log", NULL, pid, tms);
   assert(strcmp(i_result, o_result) == 0, "failed on testing make_log_name(\"%%p%%t.log\", NULL)");
   FREE_C_HEAP_ARRAY(char, o_result, mtInternal);
   // %p-test.log
   jio_snprintf(i_result, JVM_MAXPATHLEN, "pid%u-test.log", pid);
   o_result = make_log_name_internal("%p-test.log", NULL, pid, tms);
   assert(strcmp(i_result, o_result) == 0, "failed on testing make_log_name(\"%%p-test.log\", NULL)");
   FREE_C_HEAP_ARRAY(char, o_result, mtInternal);
   // %t.log
   jio_snprintf(i_result, JVM_MAXPATHLEN, "%s.log", tms);
   o_result = make_log_name_internal("%t.log", NULL, pid, tms);
   assert(strcmp(i_result, o_result) == 0, "failed on testing make_log_name(\"%%t.log\", NULL)");
   FREE_C_HEAP_ARRAY(char, o_result, mtInternal);
   {
     // longest filename
     char longest_name[JVM_MAXPATHLEN];
     memset(longest_name, 'a', sizeof(longest_name));
     longest_name[JVM_MAXPATHLEN - 1] = '\0';
     o_result = make_log_name_internal((const char*)&longest_name, NULL, pid, tms);
     assert(strcmp(longest_name, o_result) == 0, err_msg("longest name does not match. expected '%s' but got '%s'", longest_name, o_result));
     FREE_C_HEAP_ARRAY(char, o_result, mtInternal);
   }
   {
     // too long file name
     char too_long_name[JVM_MAXPATHLEN + 100];
     int too_long_length = sizeof(too_long_name);
     memset(too_long_name, 'a', too_long_length);
     too_long_name[too_long_length - 1] = '\0';
     o_result = make_log_name_internal((const char*)&too_long_name, NULL, pid, tms);
     assert(o_result == NULL, err_msg("Too long file name should return NULL, but got '%s'", o_result));
   }
   {
     // too long with timestamp
     char longest_name[JVM_MAXPATHLEN];
     memset(longest_name, 'a', JVM_MAXPATHLEN);
     longest_name[JVM_MAXPATHLEN - 3] = '%';
     longest_name[JVM_MAXPATHLEN - 2] = 't';
     longest_name[JVM_MAXPATHLEN - 1] = '\0';
     o_result = make_log_name_internal((const char*)&longest_name, NULL, pid, tms);
     assert(o_result == NULL, err_msg("Too long file name after timestamp expansion should return NULL, but got '%s'", o_result));
   }
   {
     // too long with pid
     char longest_name[JVM_MAXPATHLEN];
     memset(longest_name, 'a', JVM_MAXPATHLEN);
     longest_name[JVM_MAXPATHLEN - 3] = '%';
     longest_name[JVM_MAXPATHLEN - 2] = 'p';
     longest_name[JVM_MAXPATHLEN - 1] = '\0';
     o_result = make_log_name_internal((const char*)&longest_name, NULL, pid, tms);
     assert(o_result == NULL, err_msg("Too long file name after pid expansion should return NULL, but got '%s'", o_result));
   }
 }
 //////////////////////////////////////////////////////////////////////////////
 // Test os::vsnprintf and friends.
 void check_snprintf_result(int expected, size_t limit, int actual, bool expect_count) {
   if (expect_count || ((size_t)expected < limit)) {
     assert(expected == actual, "snprintf result not expected value");
   } else {
     // Make this check more permissive for jdk8u, don't assert that actual == 0.
     // e.g. jio_vsnprintf_wrapper and jio_snprintf return -1 when expected >= limit
     if (expected >= (int) limit) {
       assert(actual == -1, "snprintf result should be -1 for expected >= limit");
     } else {
       assert(actual > 0, "snprintf result should be >0 for expected < limit");
     }
   }
 }
 // PrintFn is expected to be int (*)(char*, size_t, const char*, ...).
 // But jio_snprintf is a C-linkage function with that signature, which
 // has a different type on some platforms (like Solaris).
 template<typename PrintFn>
 void test_snprintf(PrintFn pf, bool expect_count) {
   const char expected[] = "abcdefghijklmnopqrstuvwxyz";
   const int expected_len = sizeof(expected) - 1;
   const size_t padding_size = 10;
   char buffer[2 * (sizeof(expected) + padding_size)];
   char check_buffer[sizeof(buffer)];
   const char check_char = '1';  // Something not in expected.
   memset(check_buffer, check_char, sizeof(check_buffer));
   const size_t sizes_to_test[] = {
     sizeof(buffer) - padding_size,       // Fits, with plenty of space to spare.
     sizeof(buffer)/2,                    // Fits, with space to spare.
     sizeof(buffer)/4,                    // Doesn't fit.
     sizeof(expected) + padding_size + 1, // Fits, with a little room to spare
     sizeof(expected) + padding_size,     // Fits exactly.
     sizeof(expected) + padding_size - 1, // Doesn't quite fit.
 ,                                   // One char + terminating NUL.
 ,                                   // Only space for terminating NUL.
 };                                 // No space at all.
   for (unsigned i = 0; i < ARRAY_SIZE(sizes_to_test); ++i) {
     memset(buffer, check_char, sizeof(buffer)); // To catch stray writes.
     size_t test_size = sizes_to_test[i];
     ResourceMark rm;
     stringStream s;
     s.print("test_size: " SIZE_FORMAT, test_size);
     size_t prefix_size = padding_size;
     guarantee(test_size <= (sizeof(buffer) - prefix_size), "invariant");
     size_t write_size = MIN2(sizeof(expected), test_size);
     size_t suffix_size = sizeof(buffer) - prefix_size - write_size;
     char* write_start = buffer + prefix_size;
     char* write_end = write_start + write_size;
     int result = pf(write_start, test_size, "%s", expected);
     check_snprintf_result(expected_len, test_size, result, expect_count);
     // Verify expected output.
     if (test_size > 0) {
       assert(0 == strncmp(write_start, expected, write_size - 1), "strncmp failure");
       // Verify terminating NUL of output.
       assert('\0' == write_start[write_size - 1], "null terminator failure");
     } else {
       guarantee(test_size == 0, "invariant");
       guarantee(write_size == 0, "invariant");
       guarantee(prefix_size + suffix_size == sizeof(buffer), "invariant");
       guarantee(write_start == write_end, "invariant");
     }
     // Verify no scribbling on prefix or suffix.
     assert(0 == strncmp(buffer, check_buffer, prefix_size), "prefix scribble");
     assert(0 == strncmp(write_end, check_buffer, suffix_size), "suffix scribble");
   }
   // Special case of 0-length buffer with empty (except for terminator) output.
   check_snprintf_result(0, 0, pf(NULL, 0, "%s", ""), expect_count);
   check_snprintf_result(0, 0, pf(NULL, 0, ""), expect_count);
 }
 // This is probably equivalent to os::snprintf, but we're being
 // explicit about what we're testing here.
 static int vsnprintf_wrapper(char* buf, size_t len, const char* fmt, ...) {
   va_list args;
   va_start(args, fmt);
   int result = os::vsnprintf(buf, len, fmt, args);
   va_end(args);
   return result;
 }
 // These are declared in jvm.h; test here, with related functions.
 extern "C" {
 int jio_vsnprintf(char*, size_t, const char*, va_list);
 int jio_snprintf(char*, size_t, const char*, ...);
 }
 // This is probably equivalent to jio_snprintf, but we're being
 // explicit about what we're testing here.
 static int jio_vsnprintf_wrapper(char* buf, size_t len, const char* fmt, ...) {
   va_list args;
   va_start(args, fmt);
   int result = jio_vsnprintf(buf, len, fmt, args);
   va_end(args);
   return result;
 }
 void test_snprintf() {
   test_snprintf(vsnprintf_wrapper, true);
   test_snprintf(os::snprintf, true);
   test_snprintf(jio_vsnprintf_wrapper, false); // jio_vsnprintf returns -1 on error including exceeding buffer size
   test_snprintf(jio_snprintf, false);          // jio_snprintf calls jio_vsnprintf
 }
 #endif // PRODUCT
 fileStream::fileStream(const char* file_name) {
   _file = fopen(file_name, "w");
   if (_file != NULL) {
     _need_close = true;
   } else {
     warning("Cannot open file %s due to %s\n", file_name, strerror(errno));
     _need_close = false;
   }
 }
 fileStream::fileStream(const char* file_name, const char* opentype) {
   _file = fopen(file_name, opentype);
   if (_file != NULL) {
     _need_close = true;
   } else {
     warning("Cannot open file %s due to %s\n", file_name, strerror(errno));
     _need_close = false;
   }
 }
 void fileStream::write(const char* s, size_t len) {
   if (_file != NULL)  {
     // Make an unused local variable to avoid warning from gcc 4.x compiler.
     size_t count = fwrite(s, 1, len, _file);
   }
   update_position(s, len);
 }
 long fileStream::fileSize() {
   long size = -1;
   if (_file != NULL) {
     long pos  = ::ftell(_file);
     if (::fseek(_file, 0, SEEK_END) == 0) {
       size = ::ftell(_file);
     }
     ::fseek(_file, pos, SEEK_SET);
   }
   return size;
 }
 char* fileStream::readln(char *data, int count ) {
   char * ret = ::fgets(data, count, _file);
   //Get rid of annoying \n char
   data[::strlen(data)-1] = '\0';
   return ret;
 }
 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) {
     // Make an unused local variable to avoid warning from gcc 4.x compiler.
     size_t count = ::write(_fd, s, (int)len);
   }
   update_position(s, len);
 }
 // dump vm version, os version, platform info, build id,
 // memory usage and command line flags into header
 void gcLogFileStream::dump_loggc_header() {
   if (is_open()) {
     print_cr("%s", Abstract_VM_Version::internal_vm_info_string());
     os::print_memory_info(this);
     print("CommandLine flags: ");
     CommandLineFlags::printSetFlags(this);
   }
 }
 gcLogFileStream::~gcLogFileStream() {
   if (_file != NULL) {
     if (_need_close) fclose(_file);
     _file = NULL;
   }
   if (_file_name != NULL) {
     FREE_C_HEAP_ARRAY(char, _file_name, mtInternal);
     _file_name = NULL;
   }
 }
 gcLogFileStream::gcLogFileStream(const char* file_name) {
   _cur_file_num = 0;
   _bytes_written = 0L;
   _file_name = make_log_name(file_name, NULL);
   if (_file_name == NULL) {
     warning("Cannot open file %s: file name is too long.\n", file_name);
     _need_close = false;
     UseGCLogFileRotation = false;
     return;
   }
   // gc log file rotation
   if (UseGCLogFileRotation && NumberOfGCLogFiles > 1) {
     char tempbuf[JVM_MAXPATHLEN];
     jio_snprintf(tempbuf, sizeof(tempbuf), "%s.%d" CURRENTAPPX, _file_name, _cur_file_num);
     _file = fopen(tempbuf, "w");
   } else {
     _file = fopen(_file_name, "w");
   }
   if (_file != NULL) {
     _need_close = true;
     dump_loggc_header();
   } else {
     warning("Cannot open file %s due to %s\n", _file_name, strerror(errno));
     _need_close = false;
   }
 }
 void gcLogFileStream::write(const char* s, size_t len) {
   if (_file != NULL) {
     size_t count = fwrite(s, 1, len, _file);
     _bytes_written += count;
   }
   update_position(s, len);
 }
 // rotate_log must be called from VMThread at safepoint. In case need change parameters
 // for gc log rotation from thread other than VMThread, a sub type of VM_Operation
 // should be created and be submitted to VMThread's operation queue. DO NOT call this
 // function directly. Currently, it is safe to rotate log at safepoint through VMThread.
 // That is, no mutator threads and concurrent GC threads run parallel with VMThread to
 // write to gc log file at safepoint. If in future, changes made for mutator threads or
 // concurrent GC threads to run parallel with VMThread at safepoint, write and rotate_log
 // must be synchronized.
 void gcLogFileStream::rotate_log(bool force, outputStream* out) {
   char time_msg[O_BUFLEN];
   char time_str[EXTRACHARLEN];
   char current_file_name[JVM_MAXPATHLEN];
   char renamed_file_name[JVM_MAXPATHLEN];
   if (!should_rotate(force)) {
     return;
   }
 #ifdef ASSERT
   Thread *thread = Thread::current();
   assert(thread == NULL ||
          (thread->is_VM_thread() && SafepointSynchronize::is_at_safepoint()),
          "Must be VMThread at safepoint");
 #endif
   if (NumberOfGCLogFiles == 1) {
     // rotate in same file
     rewind();
     _bytes_written = 0L;
     jio_snprintf(time_msg, sizeof(time_msg), "File  %s rotated at %s\n",
                  _file_name, os::local_time_string((char *)time_str, sizeof(time_str)));
     write(time_msg, strlen(time_msg));
     if (out != NULL) {
       out->print("%s", time_msg);
     }
     dump_loggc_header();
     return;
   }
 #if defined(_WINDOWS)
 #ifndef F_OK
 #define F_OK 0
 #endif
 #endif // _WINDOWS
   // rotate file in names extended_filename.0, extended_filename.1, ...,
   // extended_filename.<NumberOfGCLogFiles - 1>. Current rotation file name will
   // have a form of extended_filename.<i>.current where i is the current rotation
   // file number. After it reaches max file size, the file will be saved and renamed
   // with .current removed from its tail.
   if (_file != NULL) {
     jio_snprintf(renamed_file_name, JVM_MAXPATHLEN, "%s.%d",
                  _file_name, _cur_file_num);
     int result = jio_snprintf(current_file_name, JVM_MAXPATHLEN,
                               "%s.%d" CURRENTAPPX, _file_name, _cur_file_num);
     if (result >= JVM_MAXPATHLEN) {
       warning("Cannot create new log file name: %s: file name is too long.\n", current_file_name);
       return;
     }
     const char* msg = force ? "GC log rotation request has been received."
                             : "GC log file has reached the maximum size.";
     jio_snprintf(time_msg, sizeof(time_msg), "%s %s Saved as %s\n",
                      os::local_time_string((char *)time_str, sizeof(time_str)),
                                                          msg, renamed_file_name);
     write(time_msg, strlen(time_msg));
     if (out != NULL) {
       out->print("%s", time_msg);
     }
     fclose(_file);
     _file = NULL;
     bool can_rename = true;
     if (access(current_file_name, F_OK) != 0) {
       // current file does not exist?
       warning("No source file exists, cannot rename\n");
       can_rename = false;
     }
     if (can_rename) {
       if (access(renamed_file_name, F_OK) == 0) {
         if (remove(renamed_file_name) != 0) {
           warning("Could not delete existing file %s\n", renamed_file_name);
           can_rename = false;
         }
       } else {
         // file does not exist, ok to rename
       }
     }
     if (can_rename && rename(current_file_name, renamed_file_name) != 0) {
       warning("Could not rename %s to %s\n", _file_name, renamed_file_name);
     }
   }
   _cur_file_num++;
   if (_cur_file_num > NumberOfGCLogFiles - 1) _cur_file_num = 0;
   int result = jio_snprintf(current_file_name,  JVM_MAXPATHLEN, "%s.%d" CURRENTAPPX,
                _file_name, _cur_file_num);
   if (result >= JVM_MAXPATHLEN) {
     warning("Cannot create new log file name: %s: file name is too long.\n", current_file_name);
     return;
   }
   _file = fopen(current_file_name, "w");
   if (_file != NULL) {
     _bytes_written = 0L;
     _need_close = true;
     // reuse current_file_name for time_msg
     jio_snprintf(current_file_name, JVM_MAXPATHLEN,
                  "%s.%d", _file_name, _cur_file_num);
     jio_snprintf(time_msg, sizeof(time_msg), "%s GC log file created %s\n",
                  os::local_time_string((char *)time_str, sizeof(time_str)), current_file_name);
     write(time_msg, strlen(time_msg));
     if (out != NULL) {
       out->print("%s", time_msg);
     }
     dump_loggc_header();
     // remove the existing file
     if (access(current_file_name, F_OK) == 0) {
       if (remove(current_file_name) != 0) {
         warning("Could not delete existing file %s\n", current_file_name);
       }
     }
   } else {
     warning("failed to open rotation log file %s due to %s\n"
             "Turned off GC log file rotation\n",
                   _file_name, strerror(errno));
     _need_close = false;
     FLAG_SET_DEFAULT(UseGCLogFileRotation, false);
   }
 }
 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;
 }
 fileStream* defaultStream::open_file(const char* log_name) {
   const char* try_name = make_log_name(log_name, NULL);
   if (try_name == NULL) {
     warning("Cannot open file %s: file name is too long.\n", log_name);
     return NULL;
   }
   fileStream* file = new(ResourceObj::C_HEAP, mtInternal) fileStream(try_name);
   FREE_C_HEAP_ARRAY(char, try_name, mtInternal);
   if (file->is_open()) {
     return file;
   }
   // Try again to open the file in the temp directory.
   delete file;
   char warnbuf[O_BUFLEN*2];
   jio_snprintf(warnbuf, sizeof(warnbuf), "Warning:  Cannot open log file: %s\n", log_name);
   // Note:  This feature is for maintainer use only.  No need for L10N.
   jio_print(warnbuf);
   try_name = make_log_name(log_name, os::get_temp_directory());
   if (try_name == NULL) {
     warning("Cannot open file %s: file name is too long for directory %s.\n", log_name, os::get_temp_directory());
     return NULL;
   }
   jio_snprintf(warnbuf, sizeof(warnbuf),
                "Warning:  Forcing option -XX:LogFile=%s\n", try_name);
   jio_print(warnbuf);
   file = new(ResourceObj::C_HEAP, mtInternal) fileStream(try_name);
   FREE_C_HEAP_ARRAY(char, try_name, mtInternal);
   if (file->is_open()) {
     return file;
   }
   delete file;
   return NULL;
 }
 void defaultStream::init_log() {
   // %%% Need a MutexLocker?
   const char* log_name = LogFile != NULL ? LogFile : "hotspot_%p.log";
   fileStream* file = open_file(log_name);
   if (file != NULL) {
     _log_file = file;
     _outer_xmlStream = new(ResourceObj::C_HEAP, mtInternal) xmlStream(file);
     start_log();
   } else {
     // and leave xtty as NULL
     LogVMOutput = false;
     DisplayVMOutput = true;
     LogCompilation = false;
   }
 }
 void defaultStream::start_log() {
   xmlStream*xs = _outer_xmlStream;
     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(), (int64_t)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!
 }
 // 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='" UINTX_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);
 }
 bool ttyLocker::release_tty_if_locked() {
   intx thread_id = os::current_thread_id();
   if (defaultStream::instance->writer() == thread_id) {
     // release the lock and return true so callers know if was
     // previously held.
     release_tty(thread_id);
     return true;
   }
   return false;
 }
 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, mtInternal) 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, mtInternal)
                              gcLogFileStream(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 INCLUDE_CDS
   // For -XX:DumpLoadedClassList=<file> option
   if (DumpLoadedClassList != NULL) {
     const char* list_name = make_log_name(DumpLoadedClassList, NULL);
     classlist_file = new(ResourceObj::C_HEAP, mtInternal)
                          fileStream(list_name);
     FREE_C_HEAP_ARRAY(char, list_name, mtInternal);
   }
 #endif
   // 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 INCLUDE_CDS
   if (classlist_file != NULL) {
     delete classlist_file;
   }
 #endif
   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;
   // compile task prints time stamp relative to VM start
   _stamp.update_to(1);
 }
 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, size_t bufmax) : outputStream() {
   buffer_length = initial_size;
   buffer        = NEW_C_HEAP_ARRAY(char, buffer_length, mtInternal);
   buffer_pos    = 0;
   buffer_fixed  = false;
   buffer_max    = bufmax;
 }
 bufferedStream::bufferedStream(char* fixed_buffer, size_t fixed_buffer_size, size_t bufmax) : outputStream() {
   buffer_length = fixed_buffer_size;
   buffer        = fixed_buffer;
   buffer_pos    = 0;
   buffer_fixed  = true;
   buffer_max    = bufmax;
 }
 void bufferedStream::write(const char* s, size_t len) {
   if(buffer_pos + len > buffer_max) {
     flush();
   }
   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, mtInternal);
       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, mtInternal);
   }
 }
 #ifndef PRODUCT
 #if defined(SOLARIS) || defined(LINUX) || defined(AIX) || defined(_ALLBSD_SOURCE)
 #include <sys/types.h>
 #include <sys/socket.h>
 #include <netinet/in.h>
 #include <arpa/inet.h>
 #endif
 // Network access
 networkStream::networkStream() : bufferedStream(1024*10, 1024*10) {
   _socket = -1;
   int result = os::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 os::recv(_socket, buf, (int)len, 0);
 }
 void networkStream::flush() {
   if (size() != 0) {
     int result = os::raw_send(_socket, (char *)base(), size(), 0);
     assert(result != -1, "connection error");
     assert(result == (int)size(), "didn't send enough data");
   }
   reset();
 }
 networkStream::~networkStream() {
   close();
 }
 void networkStream::close() {
   if (_socket != -1) {
     flush();
     os::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 == (uint32_t)-1) {
     struct hostent* host = os::get_host_by_name((char*)ip);
     if (host != NULL) {
       memcpy(&server.sin_addr, host->h_addr_list[0], host->h_length);
     } else {
       return false;
     }
   }
   int result = os::connect(_socket, (struct sockaddr*)&server, sizeof(struct sockaddr_in));
   return (result >= 0);
 }
 #endif

Mercurial > jdk8-mips64-public > hotspot / annotate

src/share/vm/utilities/ostream.cpp@624a0741915c (annotated)

src/share/vm/utilities/ostream.cpp