60b26f1546
It's currently possible to change the log level in gem5 by tweaking a set of global variables. These variables are currently exposed to Python using SWIG. This mechanism is far from ideal for two reasons: First, changing the log level requires that the Python world enables or disables individual levels. Ideally, this should be a single call where a log level is selected. Second, exporting global variables is poorly supported by most Python frameworks. SWIG puts variables in their own namespace and PyBind doesn't seem to support it at all. This changeset refactors the logging code to create a more abstract interface. Each log level is associated with an instance of a Logger class. This class contains common functionality, an enable flag, and a verbose flag. Available LogLevels are described by the LogLevel class. Lower log levels are used for more critical messages (PANIC being level 0) and higher levels for less critical messages. The highest log level that is printed is controlled by calling Logger:setLevel(). Change-Id: I31e44299d242d953197a8e62679250c91d6ef776 Signed-off-by: Andreas Sandberg <andreas.sandberg@arm.com> Reviewed-by: Gabor Dozsa <gabor.dozsa@arm.com> Reviewed-by: Curtis Dunham <curtis.dunham@arm.com> Reviewed-by: Jason Lowe-Power <jason@lowepower.com>
115 lines
3.8 KiB
C++
115 lines
3.8 KiB
C++
/*
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* Copyright (c) 2014, 2017 ARM Limited
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* All rights reserved
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*
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* The license below extends only to copyright in the software and shall
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* not be construed as granting a license to any other intellectual
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* property including but not limited to intellectual property relating
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* to a hardware implementation of the functionality of the software
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* licensed hereunder. You may use the software subject to the license
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* terms below provided that you ensure that this notice is replicated
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* unmodified and in its entirety in all distributions of the software,
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* modified or unmodified, in source code or in binary form.
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*
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* Copyright (c) 2002-2005 The Regents of The University of Michigan
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are
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* met: redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer;
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* redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution;
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* neither the name of the copyright holders nor the names of its
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* contributors may be used to endorse or promote products derived from
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* this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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* Authors: Nathan Binkert
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* Andreas Sandberg
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*/
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#include "base/misc.hh"
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#include <array>
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#include "base/hostinfo.hh"
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#include "base/output.hh"
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#include "base/trace.hh"
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#include "base/types.hh"
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#include "sim/core.hh"
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Logger &
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Logger::get(LogLevel ll)
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{
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static std::array<Logger *, NUM_LOG_LEVELS> loggers{{
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new ExitLogger(std::cerr, "panic"),
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new ExitLogger(std::cerr, "fatal"),
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new Logger(std::cerr, "warn"),
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new Logger(std::cerr, "info"),
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new Logger(std::cerr, "hack"),
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}};
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return *loggers[ll];
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}
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void
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Logger::setLevel(LogLevel ll)
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{
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for (int i = 0; i < NUM_LOG_LEVELS; ++i)
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get(LogLevel(i)).enabled = (i <= ll);
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}
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static void
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newline_if_needed(std::ostream &stream, const char *format)
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{
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const size_t format_len(strlen(format));
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switch (format_len ? format[format_len - 1] : '\0') {
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case '\n':
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case '\r':
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break;
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default:
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stream << std::endl;
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}
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}
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Logger::Logger(std::ostream &_stream, const char *_prefix)
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: enabled(true), verbose(false), stream(_stream), prefix(_prefix)
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{
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}
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void
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Logger::printEpilogue(const char *func, const char *file, int line,
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const char *format)
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{
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newline_if_needed(stream, format);
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if (verbose) {
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ccprintf(stream, " @ tick %d\n[%s:%s, line %d]\n",
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curTick(), func, file, line);
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}
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}
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void
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ExitLogger::printEpilogue(const char *func, const char *file, int line,
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const char *format)
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{
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Logger::printEpilogue(func, file, line, format);
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ccprintf(stream, "Memory Usage: %ld KBytes\n", memUsage());
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}
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