src/base/logging.cc

/*
 * Copyright (c) 2014, 2017 ARM Limited
 * All rights reserved
 *
 * The license below extends only to copyright in the software and shall
 * not be construed as granting a license to any other intellectual
 * property including but not limited to intellectual property relating
 * to a hardware implementation of the functionality of the software
 * licensed hereunder.  You may use the software subject to the license
 * terms below provided that you ensure that this notice is replicated
 * unmodified and in its entirety in all distributions of the software,
 * modified or unmodified, in source code or in binary form.
 *
 * Copyright (c) 2002-2005 The Regents of The University of Michigan
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are
 * met: redistributions of source code must retain the above copyright
 * notice, this list of conditions and the following disclaimer;
 * redistributions in binary form must reproduce the above copyright
 * notice, this list of conditions and the following disclaimer in the
 * documentation and/or other materials provided with the distribution;
 * neither the name of the copyright holders nor the names of its
 * contributors may be used to endorse or promote products derived from
 * this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 *
 * Authors: Nathan Binkert
 *          Andreas Sandberg
 */

#include "base/logging.hh"

#include <array>

#include "base/hostinfo.hh"
#include "base/output.hh"
#include "base/trace.hh"
#include "base/types.hh"
#include "sim/core.hh"

void
Logger::setLevel(LogLevel ll)
{
    for (int i = 0; i < NUM_LOG_LEVELS; ++i)
        get(LogLevel(i)).enabled = (i <= ll);
}

static void
newline_if_needed(std::ostream &stream, const char *format)
{
    const size_t format_len(strlen(format));

    switch (format_len ? format[format_len - 1] : '\0') {
      case '\n':
      case '\r':
        break;
      default:
        stream << std::endl;
    }
}

Logger::Logger(std::ostream &_stream, const char *_prefix)
    : enabled(true), verbose(false), stream(_stream), prefix(_prefix)
{
}

void
Logger::printEpilogue(const char *func, const char *file, int line,
                        const char *format)
{
    newline_if_needed(stream, format);

    if (verbose) {
        ccprintf(stream, " @ tick %d\n[%s:%s, line %d]\n",
                 curTick(), func, file, line);
    }
}

class ExitLogger : public Logger
{
  public:
    using Logger::Logger;

    void printEpilogue(const char *func, const char *file, int line,
                       const char *format) override;
};

void
ExitLogger::printEpilogue(const char *func, const char *file, int line,
                            const char *format)
{
    Logger::printEpilogue(func, file, line, format);

    ccprintf(stream, "Memory Usage: %ld KBytes\n", memUsage());
}

Logger &
Logger::get(LogLevel ll)
{
    static std::array<Logger *, NUM_LOG_LEVELS> loggers{{
        new ExitLogger(std::cerr, "panic"),
        new ExitLogger(std::cerr, "fatal"),
        new Logger(std::cerr, "warn"),
        new Logger(std::cerr, "info"),
        new Logger(std::cerr, "hack"),
    }};

    return *loggers[ll];
}