1 /*
   2  * Copyright (c) 2015, 2017, 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 "jvm.h"
  26 #include "logging/logDecorators.hpp"
  27 #include "logging/logDecorations.hpp"
  28 #include "logging/logFileStreamOutput.hpp"
  29 #include "logging/logMessageBuffer.hpp"
  30 #include "memory/allocation.inline.hpp"
  31 
  32 static bool initialized;
  33 static union {
  34   char stdoutmem[sizeof(LogStdoutOutput)];
  35   jlong dummy;
  36 } aligned_stdoutmem;
  37 static union {
  38   char stderrmem[sizeof(LogStderrOutput)];
  39   jlong dummy;
  40 } aligned_stderrmem;
  41 
  42 LogStdoutOutput &StdoutLog = reinterpret_cast<LogStdoutOutput&>(aligned_stdoutmem.stdoutmem);
  43 LogStderrOutput &StderrLog = reinterpret_cast<LogStderrOutput&>(aligned_stderrmem.stderrmem);
  44 
  45 LogFileStreamInitializer::LogFileStreamInitializer() {
  46   if (!initialized) {
  47     ::new (&StdoutLog) LogStdoutOutput();
  48     ::new (&StderrLog) LogStderrOutput();
  49     initialized = true;
  50   }
  51 }
  52 
  53 int LogFileStreamOutput::write_decorations(const LogDecorations& decorations) {
  54   int total_written = 0;
  55 
  56   for (uint i = 0; i < LogDecorators::Count; i++) {
  57     LogDecorators::Decorator decorator = static_cast<LogDecorators::Decorator>(i);
  58     if (!_decorators.is_decorator(decorator)) {
  59       continue;
  60     }
  61 
  62     int written = jio_fprintf(_stream, "[%-*s]",
  63                               _decorator_padding[decorator],
  64                               decorations.decoration(decorator));
  65     if (written <= 0) {
  66       return -1;
  67     } else if (static_cast<size_t>(written - 2) > _decorator_padding[decorator]) {
  68       _decorator_padding[decorator] = written - 2;
  69     }
  70     total_written += written;
  71   }
  72   return total_written;
  73 }
  74 
  75 int LogFileStreamOutput::write(const LogDecorations& decorations, const char* msg) {
  76   const bool use_decorations = !_decorators.is_empty();
  77 
  78   int written = 0;
  79   os::flockfile(_stream);
  80   if (use_decorations) {
  81     written += write_decorations(decorations);
  82     written += jio_fprintf(_stream, " ");
  83   }
  84   written += jio_fprintf(_stream, "%s\n", msg);
  85   fflush(_stream);
  86   os::funlockfile(_stream);
  87 
  88   return written;
  89 }
  90 
  91 int LogFileStreamOutput::write(LogMessageBuffer::Iterator msg_iterator) {
  92   const bool use_decorations = !_decorators.is_empty();
  93 
  94   int written = 0;
  95   os::flockfile(_stream);
  96   for (; !msg_iterator.is_at_end(); msg_iterator++) {
  97     if (use_decorations) {
  98       written += write_decorations(msg_iterator.decorations());
  99       written += jio_fprintf(_stream, " ");
 100     }
 101     written += jio_fprintf(_stream, "%s\n", msg_iterator.message());
 102   }
 103   fflush(_stream);
 104   os::funlockfile(_stream);
 105 
 106   return written;
 107 }