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/logConfiguration.hpp"
  27 #include "logging/logDecorations.hpp"
  28 #include "runtime/os.inline.hpp"
  29 #include "runtime/thread.inline.hpp"
  30 #include "services/management.hpp"
  31 
  32 jlong LogDecorations::_vm_start_time_millis = 0;
  33 const char* LogDecorations::_host_name = "";
  34 
  35 LogDecorations::LogDecorations(LogLevelType level, const LogTagSet &tagset, const LogDecorators &decorators)
  36     : _level(level), _tagset(tagset), _millis(-1) {
  37   create_decorations(decorators);
  38 }
  39 
  40 void LogDecorations::initialize(jlong vm_start_time) {
  41   char buffer[1024];
  42   if (os::get_host_name(buffer, sizeof(buffer))){
  43     _host_name = os::strdup_check_oom(buffer);
  44   }
  45   _vm_start_time_millis = vm_start_time;
  46 }
  47 
  48 void LogDecorations::create_decorations(const LogDecorators &decorators) {
  49   char* position = _decorations_buffer;
  50   #define DECORATOR(full_name, abbr) \
  51   if (decorators.is_decorator(LogDecorators::full_name##_decorator)) { \
  52     _decoration_offset[LogDecorators::full_name##_decorator] = position; \
  53     position = create_##full_name##_decoration(position) + 1; \
  54   }
  55   DECORATOR_LIST
  56 #undef DECORATOR
  57 }
  58 
  59 jlong LogDecorations::java_millis() {
  60   if (_millis < 0) {
  61     _millis = os::javaTimeMillis();
  62   }
  63   return _millis;
  64 }
  65 
  66 #define ASSERT_AND_RETURN(written, pos) \
  67     assert(written >= 0, "Decorations buffer overflow"); \
  68     return pos + written;
  69 
  70 char* LogDecorations::create_time_decoration(char* pos) {
  71   char* buf = os::iso8601_time(pos, 29);
  72   int written = buf == NULL ? -1 : 29;
  73   ASSERT_AND_RETURN(written, pos)
  74 }
  75 
  76 char* LogDecorations::create_utctime_decoration(char* pos) {
  77   char* buf = os::iso8601_time(pos, 29, true);
  78   int written = buf == NULL ? -1 : 29;
  79   ASSERT_AND_RETURN(written, pos)
  80 }
  81 
  82 char * LogDecorations::create_uptime_decoration(char* pos) {
  83   int written = jio_snprintf(pos, DecorationsBufferSize - (pos - _decorations_buffer), "%.3fs", os::elapsedTime());
  84   ASSERT_AND_RETURN(written, pos)
  85 }
  86 
  87 char * LogDecorations::create_timemillis_decoration(char* pos) {
  88   int written = jio_snprintf(pos, DecorationsBufferSize - (pos - _decorations_buffer), INT64_FORMAT "ms", java_millis());
  89   ASSERT_AND_RETURN(written, pos)
  90 }
  91 
  92 char * LogDecorations::create_uptimemillis_decoration(char* pos) {
  93   int written = jio_snprintf(pos, DecorationsBufferSize - (pos - _decorations_buffer),
  94                              INT64_FORMAT "ms", java_millis() - _vm_start_time_millis);
  95   ASSERT_AND_RETURN(written, pos)
  96 }
  97 
  98 char * LogDecorations::create_timenanos_decoration(char* pos) {
  99   int written = jio_snprintf(pos, DecorationsBufferSize - (pos - _decorations_buffer), INT64_FORMAT "ns", os::javaTimeNanos());
 100   ASSERT_AND_RETURN(written, pos)
 101 }
 102 
 103 char * LogDecorations::create_uptimenanos_decoration(char* pos) {
 104   int written = jio_snprintf(pos, DecorationsBufferSize - (pos - _decorations_buffer), INT64_FORMAT "ns", os::elapsed_counter());
 105   ASSERT_AND_RETURN(written, pos)
 106 }
 107 
 108 char * LogDecorations::create_pid_decoration(char* pos) {
 109   int written = jio_snprintf(pos, DecorationsBufferSize - (pos - _decorations_buffer), "%d", os::current_process_id());
 110   ASSERT_AND_RETURN(written, pos)
 111 }
 112 
 113 char * LogDecorations::create_tid_decoration(char* pos) {
 114   int written = jio_snprintf(pos, DecorationsBufferSize - (pos - _decorations_buffer),
 115                              INTX_FORMAT, os::current_thread_id());
 116   ASSERT_AND_RETURN(written, pos)
 117 }
 118 
 119 char* LogDecorations::create_level_decoration(char* pos) {
 120   // Avoid generating the level decoration because it may change.
 121   // The decoration() method has a special case for level decorations.
 122   return pos;
 123 }
 124 
 125 char* LogDecorations::create_tags_decoration(char* pos) {
 126   int written = _tagset.label(pos, DecorationsBufferSize - (pos - _decorations_buffer));
 127   ASSERT_AND_RETURN(written, pos)
 128 }
 129 
 130 char* LogDecorations::create_hostname_decoration(char* pos) {
 131   int written = jio_snprintf(pos, DecorationsBufferSize - (pos - _decorations_buffer), "%s", _host_name);
 132   ASSERT_AND_RETURN(written, pos)
 133 }
 134