# -*- mode:python -*-

# Copyright (c) 2004-2006 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: Steve Reinhardt
#          Kevin Lim

import os
import sys
import glob
from SCons.Script.SConscript import SConsEnvironment

Import('env')

env['DIFFOUT'] = File('diff-out')

# Dict that accumulates lists of tests by category (quick, medium, long)
env.Tests = {}

def contents(node):
    return file(str(node)).read()

def check_test(target, source, env):
    """Check output from running test.

    Targets are as follows:
    target[0] : outdiff
    target[1] : statsdiff
    target[2] : status

    """
    # make sure target files are all gone
    for t in target:
        if os.path.exists(t.abspath):
            Execute(Delete(t.abspath))
    # Run diff on output & ref directories to find differences.
    # Exclude m5stats.txt since we will use diff-out on that.
    Execute(env.subst('diff -ubr ${SOURCES[0].dir} ${SOURCES[1].dir} ' +
                      '-I "^command line:" ' +		# for stdout file
                      '-I "^M5 compiled " ' +		# for stderr file
                      '-I "^M5 started " ' +		# for stderr file
                      '-I "^M5 executing on " ' +	# for stderr file
                      '-I "^Simulation complete at" ' +	# for stderr file
                      '-I "^Listening for" ' +		# for stderr file
                      '-I "listening for remote gdb" ' + # for stderr file
                      '--exclude=m5stats.txt --exclude=SCCS ' +
                      '--exclude=${TARGETS[0].file} ' +
                      '> ${TARGETS[0]}', target=target, source=source), None)
    print "===== Output differences ====="
    print contents(target[0])
    # Run diff-out on m5stats.txt file
    status = Execute(env.subst('$DIFFOUT $SOURCES > ${TARGETS[1]}',
                               target=target, source=source),
                     strfunction=None)
    print "===== Statistics differences ====="
    print contents(target[1])
    # Generate status file contents based on exit status of diff-out
    if status == 0:
        status_str = "passed."
    else:
        status_str = "FAILED!"
    f = file(str(target[2]), 'w')
    print >>f, env.subst('${TARGETS[2].dir}', target=target, source=source), \
          status_str
    f.close()
    # done
    return 0

def check_test_string(target, source, env):
    return env.subst("Comparing outputs in ${TARGETS[0].dir}.",
                     target=target, source=source)

testAction = env.Action(check_test, check_test_string)

def print_test(target, source, env):
    print '***** ' + contents(source[0])
    return 0

printAction = env.Action(print_test, strfunction = None)

# Static vars for update_test:
# - long-winded message about ignored sources
ignore_msg = '''
Note: The following file(s) will not be copied.  New non-standard
      output files must be copied manually once before update_ref will
      recognize them as outputs.  Otherwise they are assumed to be
      inputs and are ignored.
'''
# - reference files always needed
needed_files = set(['stdout', 'stderr', 'm5stats.txt', 'config.ini'])
# - source files we always want to ignore
known_ignores = set(['status', 'outdiff', 'statsdiff'])

def update_test(target, source, env):
    """Update reference test outputs.

    Target is phony.  First two sources are the ref & new m5stats.txt
    files, respectively.  We actually copy everything in the
    respective directories except the status & diff output files.

    """
    dest_dir = str(source[0].get_dir())
    src_dir = str(source[1].get_dir())
    dest_files = set(os.listdir(dest_dir))
    src_files = set(os.listdir(src_dir))
    # Copy all of the required files plus any existing dest files.
    wanted_files = needed_files | dest_files
    missing_files = wanted_files - src_files
    if len(missing_files) > 0:
        print "  WARNING: the following file(s) are missing " \
              "and will not be updated:"
        print "    ", " ,".join(missing_files)
    copy_files = wanted_files - missing_files
    warn_ignored_files = (src_files - copy_files) - known_ignores
    if len(warn_ignored_files) > 0:
        print ignore_msg,
        print "       ", ", ".join(warn_ignored_files)
    for f in copy_files:
        if f in dest_files:
            print "  Replacing file", f
            dest_files.remove(f)
        else:
            print "  Creating new file", f
        copyAction = Copy(os.path.join(dest_dir, f), os.path.join(src_dir, f))
        copyAction.strfunction = None
        Execute(copyAction)
    return 0

def update_test_string(target, source, env):
    return env.subst("Updating ${SOURCES[0].dir} from ${SOURCES[1].dir}",
                     target=target, source=source)

updateAction = env.Action(update_test, update_test_string)

def test_builder(env, ref_dir):
    """Define a test."""

    (category, name, _ref, isa, opsys, config) = ref_dir.split('/')
    assert(_ref == 'ref')

    # target path (where test output goes) is the same except without
    # the 'ref' component
    tgt_dir = os.path.join(category, name, isa, opsys, config)

    # prepend file name with tgt_dir
    def tgt(f):
        return os.path.join(tgt_dir, f)

    ref_stats = os.path.join(ref_dir, 'm5stats.txt')
    new_stats = tgt('m5stats.txt')
    status_file = tgt('status')

    # Base command for running test.  We mess around with indirectly
    # referring to files via SOURCES and TARGETS so that scons can
    # mess with paths all it wants to and we still get the right
    # files.
    cmd = '${SOURCES[0]} -d $TARGET.dir'
    cmd += ' -re --stdout-file stdout --stderr-file stderr'
    cmd += ' ${SOURCES[1]} %s' % tgt_dir

    # Prefix test run with batch job submission command if appropriate.
    # Batch command also supports timeout arg (in seconds, not minutes).
    timeout = 15 * 60 # used to be a param, probably should be again
    if env['BATCH']:
        cmd = '%s -t %d %s' % (env['BATCH_CMD'], timeout, cmd)

    env.Command([tgt('stdout'), tgt('stderr'), new_stats],
                [env.M5Binary, 'run.py'], cmd)

    # order of targets is important... see check_test
    env.Command([tgt('outdiff'), tgt('statsdiff'), status_file],
                [ref_stats, new_stats],
                testAction)

    # phony target to echo status
    if env['update_ref']:
        p = env.Command(tgt('_update'),
                        [ref_stats, new_stats, status_file],
                        updateAction)
    else:
        p = env.Command(tgt('_print'), [status_file], printAction)

    env.AlwaysBuild(p)


# Figure out applicable configs based on build type
configs = []
if env['FULL_SYSTEM']:
    if env['TARGET_ISA'] == 'alpha':
        if not env['ALPHA_TLASER']:
            configs += ['tsunami-simple-atomic',
                        'tsunami-simple-timing',
                        'tsunami-simple-atomic-dual',
                        'tsunami-simple-timing-dual',
                        'twosys-tsunami-simple-atomic']
    if env['TARGET_ISA'] == 'sparc':
        configs += ['t1000-simple-atomic',
                    't1000-simple-timing']

else:
    configs += ['simple-atomic', 'simple-timing', 'o3-timing', 'memtest']

cwd = os.getcwd()
os.chdir(str(Dir('.').srcdir))
for config in configs:
    dirs = glob.glob('*/*/ref/%s/*/%s' % (env['TARGET_ISA'], config))
    for d in dirs:
        test_builder(env, d)
os.chdir(cwd)