| /* |
| * Copyright (c) 2016, 2018, Oracle and/or its affiliates. All rights reserved. |
| * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| * |
| * This code is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License version 2 only, as |
| * published by the Free Software Foundation. |
| * |
| * This code is distributed in the hope that it will be useful, but WITHOUT |
| * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| * version 2 for more details (a copy is included in the LICENSE file that |
| * accompanied this code). |
| * |
| * You should have received a copy of the GNU General Public License version |
| * 2 along with this work; if not, write to the Free Software Foundation, |
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| * |
| * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| * |
| */ |
| #include "precompiled.hpp" |
| #include "logging/logMessageBuffer.hpp" |
| #include "memory/allocation.inline.hpp" |
| #include "runtime/thread.inline.hpp" |
| |
| template <typename T> |
| static void grow(T*& buffer, size_t& capacity, size_t minimum_length = 0) { |
| size_t new_size = capacity * 2; |
| if (new_size < minimum_length) { |
| new_size = minimum_length; |
| } |
| buffer = REALLOC_C_HEAP_ARRAY(T, buffer, new_size, mtLogging); |
| capacity = new_size; |
| } |
| |
| LogMessageBuffer::LogMessageBuffer() : _message_buffer_size(0), |
| _message_buffer_capacity(0), |
| _message_buffer(NULL), |
| _line_count(0), |
| _line_capacity(0), |
| _lines(NULL), |
| _allocated(false), |
| _least_detailed_level(LogLevel::Off), |
| _prefix_fn(NULL) { |
| } |
| |
| LogMessageBuffer::~LogMessageBuffer() { |
| if (_allocated) { |
| FREE_C_HEAP_ARRAY(char, _message_buffer); |
| FREE_C_HEAP_ARRAY(LogLine, _lines); |
| } |
| } |
| |
| void LogMessageBuffer::reset() { |
| _message_buffer_size = 0; |
| _line_count = 0; |
| } |
| |
| void LogMessageBuffer::initialize_buffers() { |
| assert(!_allocated, "buffer already initialized/allocated"); |
| _allocated = true; |
| _message_buffer = NEW_C_HEAP_ARRAY(char, InitialMessageBufferCapacity, mtLogging); |
| _lines = NEW_C_HEAP_ARRAY(LogLine, InitialLineCapacity, mtLogging); |
| _message_buffer_capacity = InitialMessageBufferCapacity; |
| _line_capacity = InitialLineCapacity; |
| } |
| |
| void LogMessageBuffer::Iterator::skip_messages_with_finer_level() { |
| for (; _current_line_index < _message._line_count; _current_line_index++) { |
| if (_message._lines[_current_line_index].level >= _level) { |
| break; |
| } |
| } |
| } |
| |
| void LogMessageBuffer::write(LogLevelType level, const char* fmt, ...) { |
| va_list args; |
| va_start(args, fmt); |
| vwrite(level, fmt, args); |
| va_end(args); |
| }; |
| |
| void LogMessageBuffer::vwrite(LogLevelType level, const char* fmt, va_list args) { |
| if (!_allocated) { |
| initialize_buffers(); |
| } |
| |
| if (level > _least_detailed_level) { |
| _least_detailed_level = level; |
| } |
| |
| size_t written; |
| for (int attempts = 0; attempts < 2; attempts++) { |
| written = 0; |
| size_t remaining_buffer_length = _message_buffer_capacity - _message_buffer_size; |
| char* current_buffer_position = _message_buffer + _message_buffer_size; |
| |
| if (_prefix_fn != NULL) { |
| written += _prefix_fn(current_buffer_position, remaining_buffer_length); |
| current_buffer_position += written; |
| if (remaining_buffer_length < written) { |
| remaining_buffer_length = 0; |
| } else { |
| remaining_buffer_length -= written; |
| } |
| } |
| |
| va_list copy; |
| va_copy(copy, args); |
| written += (size_t)os::vsnprintf(current_buffer_position, remaining_buffer_length, fmt, copy) + 1; |
| va_end(copy); |
| if (written > _message_buffer_capacity - _message_buffer_size) { |
| assert(attempts == 0, "Second attempt should always have a sufficiently large buffer (resized to fit)."); |
| grow(_message_buffer, _message_buffer_capacity, _message_buffer_size + written); |
| continue; |
| } |
| break; |
| } |
| |
| if (_line_count == _line_capacity) { |
| grow(_lines, _line_capacity); |
| } |
| |
| _lines[_line_count].level = level; |
| _lines[_line_count].message_offset = _message_buffer_size; |
| _message_buffer_size += written; |
| _line_count++; |
| } |
| |
| #define LOG_LEVEL(level, name) \ |
| LogMessageBuffer& LogMessageBuffer::v##name(const char* fmt, va_list args) { \ |
| vwrite(LogLevel::level, fmt, args); \ |
| return *this; \ |
| } \ |
| LogMessageBuffer& LogMessageBuffer::name(const char* fmt, ...) { \ |
| va_list args; \ |
| va_start(args, fmt); \ |
| vwrite(LogLevel::level, fmt, args); \ |
| va_end(args); \ |
| return *this; \ |
| } |
| LOG_LEVEL_LIST |
| #undef LOG_LEVEL |