1 /*
   2  * Copyright (c) 2012, 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 
  25 #include "precompiled.hpp"
  26 #include "gc_implementation/g1/g1_globals.hpp"
  27 #include "gc_implementation/g1/g1Log.hpp"
  28 #include "runtime/globals_extension.hpp"
  29 
  30 G1Log::LogLevel G1Log::_level = G1Log::LevelNone;
  31 
  32 
  33 // Updates _level based on PrintGC and PrintGCDetails values (unless
  34 // G1LogLevel is set explicitly)
  35 // - PrintGC maps to "fine".
  36 // - PrintGCDetails maps to "finer".
  37 void G1Log::update_level() {
  38   if (FLAG_IS_DEFAULT(G1LogLevel)) {
  39     _level = LevelNone;
  40     if (PrintGCDetails) {
  41       _level = LevelFiner;
  42     } else if (PrintGC) {
  43       _level = LevelFine;
  44     }
  45   }
  46 }
  47 
  48 
  49 // If G1LogLevel has not been set up we will use the values of PrintGC
  50 // and PrintGCDetails for the logging level.
  51 void G1Log::init() {
  52   if (!FLAG_IS_DEFAULT(G1LogLevel)) {
  53     // PrintGC flags change won't have any affect, because G1LogLevel
  54     // is set explicitly
  55     if (G1LogLevel[0] == '\0' || strncmp("none", G1LogLevel, 4) == 0 && G1LogLevel[4] == '\0') {
  56       _level = LevelNone;
  57     } else if (strncmp("fine", G1LogLevel, 4) == 0 && G1LogLevel[4] == '\0') {
  58       _level = LevelFine;
  59     } else if (strncmp("finer", G1LogLevel, 5) == 0 && G1LogLevel[5] == '\0') {
  60       _level = LevelFiner;
  61     } else if (strncmp("finest", G1LogLevel, 6) == 0 && G1LogLevel[6] == '\0') {
  62       _level = LevelFinest;
  63     } else {
  64       warning("Unknown logging level '%s', should be one of 'fine', 'finer' or 'finest'.", G1LogLevel);
  65     }
  66   } else {
  67     update_level();
  68   }
  69 }
  70