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 volatile jint initialized;
  32 static char stdoutmem[sizeof(LogStdoutOutput)];
  33 static char stderrmem[sizeof(LogStderrOutput)];
  34 
  35 LogStdoutOutput &StdoutLog = reinterpret_cast<LogStdoutOutput&>(stdoutmem);
  36 LogStderrOutput &StderrLog = reinterpret_cast<LogStderrOutput&>(stderrmem);
  37 
  38 LogFileStreamInitializer::LogFileStreamInitializer() {
  39   if (Atomic::cmpxchg(1, &initialized, 0) == 0) {
  40     ::new (&StdoutLog) LogStdoutOutput();
  41     ::new (&StderrLog) LogStderrOutput();
  42   }
  43 }
  44 
  45 int LogFileStreamOutput::write_decorations(const LogDecorations& decorations) {
  46   int total_written = 0;
  47 
  48   for (uint i = 0; i < LogDecorators::Count; i++) {
  49     LogDecorators::Decorator decorator = static_cast<LogDecorators::Decorator>(i);
  50     if (!_decorators.is_decorator(decorator)) {
  51       continue;
  52     }
  53 
  54     int written = jio_fprintf(_stream, "[%-*s]",
  55                               _decorator_padding[decorator],
  56                               decorations.decoration(decorator));
  57     if (written <= 0) {
  58       return -1;
  59     } else if (static_cast<size_t>(written - 2) > _decorator_padding[decorator]) {
  60       _decorator_padding[decorator] = written - 2;
  61     }
  62     total_written += written;
  63   }
  64   return total_written;
  65 }
  66 
  67 int LogFileStreamOutput::write(const LogDecorations& decorations, const char* msg) {
  68   const bool use_decorations = !_decorators.is_empty();
  69 
  70   int written = 0;
  71   os::flockfile(_stream);
  72   if (use_decorations) {
  73     written += write_decorations(decorations);
  74     written += jio_fprintf(_stream, " ");
  75   }
  76   written += jio_fprintf(_stream, "%s\n", msg);
  77   fflush(_stream);
  78   os::funlockfile(_stream);
  79 
  80   return written;
  81 }
  82 
  83 int LogFileStreamOutput::write(LogMessageBuffer::Iterator msg_iterator) {
  84   const bool use_decorations = !_decorators.is_empty();
  85 
  86   int written = 0;
  87   os::flockfile(_stream);
  88   for (; !msg_iterator.is_at_end(); msg_iterator++) {
  89     if (use_decorations) {
  90       written += write_decorations(msg_iterator.decorations());
  91       written += jio_fprintf(_stream, " ");
  92     }
  93     written += jio_fprintf(_stream, "%s\n", msg_iterator.message());
  94   }
  95   fflush(_stream);
  96   os::funlockfile(_stream);
  97 
  98   return written;
  99 }