1 /*
   2  * Copyright (c) 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 #include "precompiled.hpp"
  25 #include "logging/logDecorators.hpp"
  26 #include "logging/logDecorations.hpp"
  27 #include "logging/logFileStreamOutput.hpp"
  28 #include "logging/logMessageBuffer.hpp"
  29 #include "memory/allocation.inline.hpp"
  30 
  31 static bool initialized;
  32 static union {
  33   char stdoutmem[sizeof(LogStdoutOutput)];
  34   jlong dummy;
  35 } aligned_stdoutmem;
  36 static union {
  37   char stderrmem[sizeof(LogStderrOutput)];
  38   jlong dummy;
  39 } aligned_stderrmem;
  40 
  41 LogStdoutOutput &StdoutLog = reinterpret_cast<LogStdoutOutput&>(aligned_stdoutmem.stdoutmem);
  42 LogStderrOutput &StderrLog = reinterpret_cast<LogStderrOutput&>(aligned_stderrmem.stderrmem);
  43 
  44 LogFileStreamInitializer::LogFileStreamInitializer() {
  45   if (!initialized) {
  46     ::new (&StdoutLog) LogStdoutOutput();
  47     ::new (&StderrLog) LogStderrOutput();
  48     initialized = true;
  49   }
  50 }
  51 
  52 int LogFileStreamOutput::write_decorations(const LogDecorations& decorations) {
  53   int total_written = 0;
  54 
  55   for (uint i = 0; i < LogDecorators::Count; i++) {
  56     LogDecorators::Decorator decorator = static_cast<LogDecorators::Decorator>(i);
  57     if (!_decorators.is_decorator(decorator)) {
  58       continue;
  59     }
  60 
  61     int written = jio_fprintf(_stream, "[%-*s]",
  62                               _decorator_padding[decorator],
  63                               decorations.decoration(decorator));
  64     if (written <= 0) {
  65       return -1;
  66     } else if (static_cast<size_t>(written - 2) > _decorator_padding[decorator]) {
  67       _decorator_padding[decorator] = written - 2;
  68     }
  69     total_written += written;
  70   }
  71   return total_written;
  72 }
  73 
  74 int LogFileStreamOutput::write(const LogDecorations& decorations, const char* msg) {
  75   const bool use_decorations = !_decorators.is_empty();
  76 
  77   int written = 0;
  78   os::flockfile(_stream);
  79   if (use_decorations) {
  80     written += write_decorations(decorations);
  81     written += jio_fprintf(_stream, " ");
  82   }
  83   written += jio_fprintf(_stream, "%s\n", msg);
  84   fflush(_stream);
  85   os::funlockfile(_stream);
  86 
  87   return written;
  88 }
  89 
  90 int LogFileStreamOutput::write(LogMessageBuffer::Iterator msg_iterator) {
  91   const bool use_decorations = !_decorators.is_empty();
  92 
  93   int written = 0;
  94   os::flockfile(_stream);
  95   for (; !msg_iterator.is_at_end(); msg_iterator++) {
  96     if (use_decorations) {
  97       written += write_decorations(msg_iterator.decorations());
  98       written += jio_fprintf(_stream, " ");
  99     }
 100     written += jio_fprintf(_stream, "%s\n", msg_iterator.message());
 101   }
 102   fflush(_stream);
 103   os::funlockfile(_stream);
 104 
 105   return written;
 106 }