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 "logging/logFileStreamOutput.hpp"
  26 #include "logging/logOutput.hpp"
  27 #include "logging/logTagSet.hpp"
  28 #include "memory/allocation.inline.hpp"
  29 #include "prims/jvm.h"
  30 #include "runtime/mutexLocker.hpp"
  31 #include "runtime/os.inline.hpp"
  32 
  33 LogOutput::~LogOutput() {
  34   os::free(_config_string);
  35 }
  36 
  37 void LogOutput::clear_config_string() {
  38   os::free(_config_string);
  39   _config_string_buffer_size = InitialConfigBufferSize;
  40   _config_string = NEW_C_HEAP_ARRAY(char, _config_string_buffer_size, mtLogging);
  41   _config_string[0] = '\0';
  42 }
  43 
  44 void LogOutput::set_config_string(const char* string) {
  45   os::free(_config_string);
  46   _config_string = os::strdup(string, mtLogging);
  47   _config_string_buffer_size = strlen(_config_string) + 1;
  48 }
  49 
  50 void LogOutput::add_to_config_string(const LogTagSet* ts, LogLevelType level) {
  51   if (_config_string_buffer_size < InitialConfigBufferSize) {
  52     _config_string_buffer_size = InitialConfigBufferSize;
  53     _config_string = REALLOC_C_HEAP_ARRAY(char, _config_string, _config_string_buffer_size, mtLogging);
  54   }
  55 
  56   size_t offset = strlen(_config_string);
  57   if (offset > 0) {
  58     // Add commas in-between tag and level combinations in the config string
  59     _config_string[offset++] = ',';
  60   }
  61 
  62   for (;;) {
  63     int ret = ts->label(_config_string + offset, _config_string_buffer_size - offset, "+");
  64     if (ret == -1) {
  65       // Double the buffer size and retry
  66       _config_string_buffer_size *= 2;
  67       _config_string = REALLOC_C_HEAP_ARRAY(char, _config_string, _config_string_buffer_size, mtLogging);
  68       continue;
  69     }
  70     break;
  71   };
  72 
  73   offset = strlen(_config_string);
  74   for (;;) {
  75     int ret = jio_snprintf(_config_string + offset, _config_string_buffer_size - offset, "=%s", LogLevel::name(level));
  76     if (ret == -1) {
  77       _config_string_buffer_size *= 2;
  78       _config_string = REALLOC_C_HEAP_ARRAY(char, _config_string, _config_string_buffer_size, mtLogging);
  79       continue;
  80     }
  81     break;
  82   }
  83 }
  84 
  85 void LogOutput::describe(outputStream *out) {
  86   out->print("%s ", name());
  87   out->print_raw(config_string());
  88   out->print(" ");
  89   char delimiter[2] = {0};
  90   for (size_t d = 0; d < LogDecorators::Count; d++) {
  91     LogDecorators::Decorator decorator = static_cast<LogDecorators::Decorator>(d);
  92     if (decorators().is_decorator(decorator)) {
  93       out->print("%s%s", delimiter, LogDecorators::name(decorator));
  94       *delimiter = ',';
  95     }
  96   }
  97 }
  98