#!/usr/bin/env python3
"""Zephyr Sanity Tests

This script scans for the set of unit test applications in the git
repository and attempts to execute them. By default, it tries to
build each test case on one platform per architecture, using a precedence
list defined in an architecture configuration file, and if possible
run the tests in the QEMU emulator.

Test cases are detected by the presence of a 'testcase.ini' file in
the application's project directory. This file may contain one or
more blocks, each identifying a test scenario. The title of the block
is a name for the test case, which only needs to be unique for the
test cases specified in that testcase.ini file. The full canonical
name for each test case is <path to test case>/<ini block>.

Each testcase.ini block can define the following key/value pairs:

 tags = <list of tags> (required)
    A set of string tags for the testcase. Usually pertains to
    functional domains but can be anything. Command line invocations
    of this script can filter the set of tests to run based on tag.

  skip = <True|False> (default False)
    skip testcase unconditionally. This can be used for broken tests.

  slow = <True|False> (default False)
    Don't run this test case unless --enable-slow was passed in on the
    command line. Intended for time-consuming test cases that are only
    run under certain circumstances, like daily builds. These test cases
    are still compiled.

  extra_args = <list of extra arguments>
    Extra arguments to pass to Make when building or running the
    test case.

  build_only = <True|False> (default False)
    If true, don't try to run the test under QEMU even if the
    selected platform supports it.

  timeout = <number of seconds>
    Length of time to run test in QEMU before automatically killing it.
    Default to 60 seconds.

  arch_whitelist = <list of arches, such as x86, arm, arc>
    Set of architectures that this test case should only be run for.

  arch_exclude = <list of arches, such as x86, arm, arc>
    Set of architectures that this test case should not run on.

  platform_whitelist = <list of platforms>
    Set of platforms that this test case should only be run for.

  platform_exclude = <list of platforms>
    Set of platforms that this test case should not run on.

  extra_sections = <list of extra binary sections>
    When computing sizes, sanitycheck will report errors if it finds
    extra, unexpected sections in the Zephyr binary unless they are named
    here. They will not be included in the size calculation.

  filter = <expression>
    Filter whether the testcase should be run by evaluating an expression
    against an environment containing the following values:

    { ARCH : <architecture>,
      PLATFORM : <platform>,
      <all CONFIG_* key/value pairs in the test's generated defconfig>,
      *<env>: any environment variable available
    }

    The grammar for the expression language is as follows:

    expression ::= expression "and" expression
                 | expression "or" expression
                 | "not" expression
                 | "(" expression ")"
                 | symbol "==" constant
                 | symbol "!=" constant
                 | symbol "<" number
                 | symbol ">" number
                 | symbol ">=" number
                 | symbol "<=" number
                 | symbol "in" list
                 | symbol ":" string
                 | symbol

    list ::= "[" list_contents "]"

    list_contents ::= constant
                    | list_contents "," constant

    constant ::= number
               | string


    For the case where expression ::= symbol, it evaluates to true
    if the symbol is defined to a non-empty string.

    Operator precedence, starting from lowest to highest:

        or (left associative)
        and (left associative)
        not (right associative)
        all comparison operators (non-associative)

    arch_whitelist, arch_exclude, platform_whitelist, platform_exclude
    are all syntactic sugar for these expressions. For instance

        arch_exclude = x86 arc

    Is the same as:

        filter = not ARCH in ["x86", "arc"]

    The ':' operator compiles the string argument as a regular expression,
    and then returns a true value only if the symbol's value in the environment
    matches. For example, if CONFIG_SOC="quark_se" then

        filter = CONFIG_SOC : "quark.*"

    Would match it.

Architectures and platforms are defined in an architecture configuration
file which are stored by default in scripts/sanity_chk/arches/. These
each define an [arch] block with the following key/value pairs:

  name = <arch name>
    The name of the arch. Example: x86

  platforms = <list of supported platforms in order of precedence>
    List of supported platforms for this arch. The ordering here
    is used to select a default platform to build for that arch.

For every platform defined, there must be a corresponding block for it
in the arch configuration file. This block can be empty if there are
no special definitions for that arch. Options are:

  qemu_support = <True|False> (default False)
    Indicates whether binaries for this platform can run under QEMU

The set of test cases that actually run depends on directives in the
testcase and architecture .ini file and options passed in on the command
line. If there is any confusion, running with -v or --discard-report
can help show why particular test cases were skipped.

Metrics (such as pass/fail state and binary size) for the last code
release are stored in scripts/sanity_chk/sanity_last_release.csv.
To update this, pass the --all --release options.

To load arguments from a file, write '+' before the file name, e.g.,
+file_name. File content must be one or more valid arguments separated by
line break instead of white spaces.

Most everyday users will run with no arguments.
"""

import argparse
import os
import sys
import configparser
import re
import tempfile
import subprocess
import multiprocessing
import select
import shutil
import signal
import threading
import time
import csv
import glob
import concurrent
import concurrent.futures
import xml.etree.ElementTree as ET
from xml.sax.saxutils import escape
from collections import OrderedDict
from itertools import islice

if "ZEPHYR_BASE" not in os.environ:
    sys.stderr.write("$ZEPHYR_BASE environment variable undefined.\n")
    exit(1)
ZEPHYR_BASE = os.environ["ZEPHYR_BASE"]

sys.path.insert(0, os.path.join(ZEPHYR_BASE, "scripts/"))

import expr_parser

VERBOSE = 0
LAST_SANITY = os.path.join(ZEPHYR_BASE, "scripts", "sanity_chk",
                           "last_sanity.csv")
LAST_SANITY_XUNIT = os.path.join(ZEPHYR_BASE, "scripts", "sanity_chk",
                           "last_sanity.xml")
RELEASE_DATA = os.path.join(ZEPHYR_BASE, "scripts", "sanity_chk",
                            "sanity_last_release.csv")
CPU_COUNTS = multiprocessing.cpu_count()

if os.isatty(sys.stdout.fileno()):
    TERMINAL = True
    COLOR_NORMAL = '\033[0m'
    COLOR_RED = '\033[91m'
    COLOR_GREEN = '\033[92m'
    COLOR_YELLOW = '\033[93m'
else:
    TERMINAL = False
    COLOR_NORMAL = ""
    COLOR_RED = ""
    COLOR_GREEN = ""
    COLOR_YELLOW = ""

class SanityCheckException(Exception):
    pass

class SanityRuntimeError(SanityCheckException):
    pass

class ConfigurationError(SanityCheckException):
    def __init__(self, cfile, message):
        self.cfile = cfile
        self.message = message

    def __str__(self):
        return repr(self.cfile + ": " + self.message)

class MakeError(SanityCheckException):
    pass

class BuildError(MakeError):
    pass

class ExecutionError(MakeError):
    pass

log_file = None

# Debug Functions
def info(what):
    sys.stdout.write(what + "\n")
    if log_file:
        log_file.write(what + "\n")
        log_file.flush()

def error(what):
    sys.stderr.write(COLOR_RED + what + COLOR_NORMAL + "\n")
    if log_file:
        log_file(what + "\n")
        log_file.flush()

def debug(what):
    if VERBOSE >= 1:
        info(what)

def verbose(what):
    if VERBOSE >= 2:
        info(what)

class Handler:
    RUN_PASSED = "PROJECT EXECUTION SUCCESSFUL"
    RUN_FAILED = "PROJECT EXECUTION FAILED"
    def __init__(self, name, outdir, log_fn, timeout, unit=False):
        """Constructor

        @param name Arbitrary name of the created thread
        @param outdir Working directory, should be where qemu.pid gets created
            by kbuild
        @param log_fn Absolute path to write out QEMU's log data
        @param timeout Kill the QEMU process if it doesn't finish up within
            the given number of seconds
        """
        self.lock = threading.Lock()
        self.state = "waiting"
        self.metrics = {}
        self.metrics["qemu_time"] = 0
        self.metrics["ram_size"] = 0
        self.metrics["rom_size"] = 0
        self.unit = unit

    def set_state(self, state, metrics):
        self.lock.acquire()
        self.state = state
        self.metrics.update(metrics)
        self.lock.release()

    def get_state(self):
        self.lock.acquire()
        ret = (self.state, self.metrics)
        self.lock.release()
        return ret

class UnitHandler(Handler):
    def __init__(self, name, sourcedir, outdir, run_log, valgrind_log, timeout):
        """Constructor

        @param name Arbitrary name of the created thread
        @param outdir Working directory containing the test binary
        @param run_log Absolute path to runtime logs
        @param valgrind Absolute path to valgrind's log
        @param timeout Kill the QEMU process if it doesn't finish up within
            the given number of seconds
        """
        super().__init__(name, outdir, run_log, timeout, True)

        self.timeout = timeout
        self.sourcedir = sourcedir
        self.outdir = outdir
        self.run_log = run_log
        self.valgrind_log = valgrind_log
        self.returncode = 0
        self.set_state("running", {})

    def handle(self):
        out_state = "failed"

        with open(self.run_log, "wt") as rl, open(self.valgrind_log, "wt") as vl:
            try:
                binary = os.path.join(self.outdir, "testbinary")
                command = [binary]
                if shutil.which("valgrind"):
                    command = ["valgrind", "--error-exitcode=2",
                               "--leak-check=full"] + command
                returncode = subprocess.call(command, timeout=self.timeout,
                                             stdout=rl, stderr=vl)
                self.returncode = returncode
                if returncode != 0:
                    if self.returncode == 1:
                        out_state = "failed"
                    else:
                        out_state = "failed valgrind"
                else:
                    out_state = "passed"
            except subprocess.TimeoutExpired:
                out_state = "timeout"
                self.returncode = 1

        returncode = subprocess.call(["GCOV_PREFIX=" + self.outdir, "gcov", self.sourcedir, "-s", self.outdir], shell=True)

        self.set_state(out_state, {})

class QEMUHandler(Handler):
    """Spawns a thread to monitor QEMU output from pipes

    We pass QEMU_PIPE to 'make qemu' and monitor the pipes for output.
    We need to do this as once qemu starts, it runs forever until killed.
    Test cases emit special messages to the console as they run, we check
    for these to collect whether the test passed or failed.
    """

    @staticmethod
    def _thread(handler, timeout, outdir, logfile, fifo_fn, pid_fn, results):
        fifo_in = fifo_fn + ".in"
        fifo_out = fifo_fn + ".out"

        # These in/out nodes are named from QEMU's perspective, not ours
        if os.path.exists(fifo_in):
            os.unlink(fifo_in)
        os.mkfifo(fifo_in)
        if os.path.exists(fifo_out):
            os.unlink(fifo_out)
        os.mkfifo(fifo_out)

        # We don't do anything with out_fp but we need to open it for
        # writing so that QEMU doesn't block, due to the way pipes work
        out_fp = open(fifo_in, "wb")
        # Disable internal buffering, we don't
        # want read() or poll() to ever block if there is data in there
        in_fp = open(fifo_out, "rb", buffering=0)
        log_out_fp = open(logfile, "wt")

        start_time = time.time()
        timeout_time = start_time + timeout
        p = select.poll()
        p.register(in_fp, select.POLLIN)

        metrics = {}
        line = ""
        while True:
            this_timeout = int((timeout_time - time.time()) * 1000)
            if this_timeout < 0 or not p.poll(this_timeout):
                out_state = "timeout"
                break

            try:
                c = in_fp.read(1).decode("utf-8")
            except UnicodeDecodeError:
                # Test is writing something weird, fail
                out_state = "unexpected byte"
                break

            if c == "":
                # EOF, this shouldn't happen unless QEMU crashes
                out_state = "unexpected eof"
                break
            line = line + c
            if c != "\n":
                continue

            # line contains a full line of data output from QEMU
            log_out_fp.write(line)
            log_out_fp.flush()
            line = line.strip()
            verbose("QEMU: %s" % line)

            if line == handler.RUN_PASSED:
                out_state = "passed"
                break

            if line == handler.RUN_FAILED:
                out_state = "failed"
                break

            # TODO: Add support for getting numerical performance data
            # from test cases. Will involve extending test case reporting
            # APIs. Add whatever gets reported to the metrics dictionary
            line = ""

        metrics["qemu_time"] = time.time() - start_time
        verbose("QEMU complete (%s) after %f seconds" %
                (out_state, metrics["qemu_time"]))
        handler.set_state(out_state, metrics)

        log_out_fp.close()
        out_fp.close()
        in_fp.close()

        pid = int(open(pid_fn).read())
        os.unlink(pid_fn)
        try:
            os.kill(pid, signal.SIGTERM)
        except ProcessLookupError:
            # Oh well, as long as it's dead! User probably sent Ctrl-C
            pass

        os.unlink(fifo_in)
        os.unlink(fifo_out)

    def __init__(self, name, outdir, log_fn, timeout):
        """Constructor

        @param name Arbitrary name of the created thread
        @param outdir Working directory, should be where qemu.pid gets created
            by kbuild
        @param log_fn Absolute path to write out QEMU's log data
        @param timeout Kill the QEMU process if it doesn't finish up within
            the given number of seconds
        """
        super().__init__(name, outdir, log_fn, timeout)
        self.results = {}

        # We pass this to QEMU which looks for fifos with .in and .out
        # suffixes.
        self.fifo_fn = os.path.join(outdir, "qemu-fifo")

        self.pid_fn = os.path.join(outdir, "qemu.pid")
        if os.path.exists(self.pid_fn):
            os.unlink(self.pid_fn)

        self.log_fn = log_fn
        self.thread = threading.Thread(name=name, target=QEMUHandler._thread,
                                       args=(self, timeout, outdir,
                                             self.log_fn, self.fifo_fn,
                                             self.pid_fn, self.results))
        self.thread.daemon = True
        verbose("Spawning QEMU process for %s" % name)
        self.thread.start()

    def get_fifo(self):
        return self.fifo_fn

class SizeCalculator:

    alloc_sections = ["bss", "noinit"]
    rw_sections = ["datas", "initlevel", "_k_task_list", "_k_event_list",
                   "_k_memory_pool", "exceptions", "initshell",
		   "_static_thread_area", "_k_timer_area",
		   "_k_mem_slab_area", "_k_mem_pool_area",
		   "_k_sem_area", "_k_mutex_area", "_k_alert_area",
		   "_k_fifo_area", "_k_lifo_area", "_k_stack_area",
		   "_k_msgq_area", "_k_mbox_area", "_k_pipe_area",
                   "net_if", "net_if_event", "net_stack", "net_l2_data",
                   "_k_queue_area", "_net_buf_pool_area" ]
    # These get copied into RAM only on non-XIP
    ro_sections = ["text", "ctors", "init_array", "reset",
                   "rodata", "devconfig", "net_l2", "vector"]

    def __init__(self, filename, extra_sections):
        """Constructor

        @param filename Path to the output binary
            The <filename> is parsed by objdump to determine section sizes
        """
        # Make sure this is an ELF binary
        with open(filename, "rb") as f:
            magic = f.read(4)

        if (magic != b'\x7fELF'):
            raise SanityRuntimeError("%s is not an ELF binary" % filename)

        # Search for CONFIG_XIP in the ELF's list of symbols using NM and AWK.
        # GREP can not be used as it returns an error if the symbol is not found.
        is_xip_command = "nm " + filename + " | awk '/CONFIG_XIP/ { print $3 }'"
        is_xip_output = subprocess.check_output(is_xip_command, shell=True,
                            stderr=subprocess.STDOUT).decode("utf-8").strip()
        if is_xip_output.endswith("no symbols"):
            raise SanityRuntimeError("%s has no symbol information" % filename)
        self.is_xip = (len(is_xip_output) != 0)

        self.filename = filename
        self.sections = []
        self.rom_size = 0
        self.ram_size = 0
        self.extra_sections = extra_sections

        self._calculate_sizes()

    def get_ram_size(self):
        """Get the amount of RAM the application will use up on the device

        @return amount of RAM, in bytes
        """
        return self.ram_size

    def get_rom_size(self):
        """Get the size of the data that this application uses on device's flash

        @return amount of ROM, in bytes
        """
        return self.rom_size

    def unrecognized_sections(self):
        """Get a list of sections inside the binary that weren't recognized

        @return list of unrecognized section names
        """
        slist = []
        for v in self.sections:
            if not v["recognized"]:
                slist.append(v["name"])
        return slist

    def _calculate_sizes(self):
        """ Calculate RAM and ROM usage by section """
        objdump_command = "objdump -h " + self.filename
        objdump_output = subprocess.check_output(objdump_command,
                                        shell=True).decode("utf-8").splitlines()

        for line in objdump_output:
            words = line.split()

            if (len(words) == 0):               # Skip lines that are too short
                continue

            index = words[0]
            if (not index[0].isdigit()):        # Skip lines that do not start
                continue                        # with a digit

            name = words[1]                     # Skip lines with section names
            if (name[0] == '.'):                # starting with '.'
                continue

            # TODO this doesn't actually reflect the size in flash or RAM as
            # it doesn't include linker-imposed padding between sections.
            # It is close though.
            size = int(words[2], 16)
            if size == 0:
                continue

            load_addr = int(words[4], 16)
            virt_addr = int(words[3], 16)

            # Add section to memory use totals (for both non-XIP and XIP scenarios)
            # Unrecognized section names are not included in the calculations.
            recognized = True
            if name in SizeCalculator.alloc_sections:
                self.ram_size += size
                stype = "alloc"
            elif name in SizeCalculator.rw_sections:
                self.ram_size += size
                self.rom_size += size
                stype = "rw"
            elif name in SizeCalculator.ro_sections:
                self.rom_size += size
                if not self.is_xip:
                    self.ram_size += size
                stype = "ro"
            else:
                stype = "unknown"
                if name not in self.extra_sections:
                    recognized = False

            self.sections.append({"name" : name, "load_addr" : load_addr,
                                  "size" : size, "virt_addr" : virt_addr,
                                  "type" : stype, "recognized" : recognized})


class MakeGoal:
    """Metadata class representing one of the sub-makes called by MakeGenerator

    MakeGenerator returns a dictionary of these which can then be associated
    with TestInstances to get a complete picture of what happened during a test.
    MakeGenerator is used for tasks outside of building tests (such as
    defconfigs) which is why MakeGoal is a separate class from TestInstance.
    """
    def __init__(self, name, text, qemu, make_log, build_log, run_log,
                 qemu_log):
        self.name = name
        self.text = text
        self.qemu = qemu
        self.make_log = make_log
        self.build_log = build_log
        self.run_log = run_log
        self.qemu_log = qemu_log
        self.make_state = "waiting"
        self.failed = False
        self.finished = False
        self.reason = None
        self.metrics = {}

    def get_error_log(self):
        if self.make_state == "waiting":
            # Shouldn't ever see this; breakage in the main Makefile itself.
            return self.make_log
        elif self.make_state == "building":
            # Failure when calling the sub-make to build the code
            return self.build_log
        elif self.make_state == "running":
            # Failure in sub-make for "make qemu", qemu probably failed to start
            return self.run_log
        elif self.make_state == "finished":
            # QEMU finished, but timed out or otherwise wasn't successful
            return self.qemu_log

    def fail(self, reason):
        self.failed = True
        self.finished = True
        self.reason = reason

    def success(self):
        self.finished = True

    def __str__(self):
        if self.finished:
            if self.failed:
                return "[%s] failed (%s: see %s)" % (self.name, self.reason,
                                                     self.get_error_log())
            else:
                return "[%s] passed" % self.name
        else:
            return "[%s] in progress (%s)" % (self.name, self.make_state)


class MakeGenerator:
    """Generates a Makefile which just calls a bunch of sub-make sessions

    In any given test suite we may need to build dozens if not hundreds of
    test cases. The cleanest way to parallelize this is to just let Make
    do the parallelization, sharing the jobserver among all the different
    sub-make targets.
    """

    GOAL_HEADER_TMPL = """.PHONY: {goal}
{goal}:
"""

    MAKE_RULE_TMPL = """\t@echo sanity_test_{phase} {goal} >&2
\t$(MAKE) -C {directory} O={outdir} V={verb} EXTRA_CFLAGS="-Werror {cflags}" EXTRA_ASMFLAGS=-Wa,--fatal-warnings EXTRA_LDFLAGS=--fatal-warnings {args} >{logfile} 2>&1
"""

    GOAL_FOOTER_TMPL = "\t@echo sanity_test_finished {goal} >&2\n\n"

    re_make = re.compile("sanity_test_([A-Za-z0-9]+) (.+)|$|make[:] \*\*\* \[(.+:.+: )?(.+)\] Error.+$")

    def __init__(self, base_outdir, asserts=False,  deprecations=False, ccache=0):
        """MakeGenerator constructor

        @param base_outdir Intended to be the base out directory. A make.log
            file will be created here which contains the output of the
            top-level Make session, as well as the dynamic control Makefile
        @param verbose If true, pass V=1 to all the sub-makes which greatly
            increases their verbosity
        """
        self.goals = {}
        if not os.path.exists(base_outdir):
            os.makedirs(base_outdir)
        self.logfile = os.path.join(base_outdir, "make.log")
        self.makefile = os.path.join(base_outdir, "Makefile")
        self.asserts = asserts
        self.deprecations = deprecations
        self.ccache = ccache

    def _get_rule_header(self, name):
        return MakeGenerator.GOAL_HEADER_TMPL.format(goal=name)

    def _get_sub_make(self, name, phase, workdir, outdir, logfile, args):
        verb = "1" if VERBOSE else "0"
        args = " ".join(args)

        if self.asserts:
            cflags="-DCONFIG_ASSERT=1 -D__ASSERT_ON=2"
        else:
            cflags=""

        if self.deprecations:
            cflags = cflags + "  -Wno-deprecated-declarations"

        if self.ccache:
            args = args + " USE_CCACHE=1"

        return MakeGenerator.MAKE_RULE_TMPL.format(phase=phase, goal=name,
                                                   outdir=outdir, cflags=cflags,
                                                   directory=workdir, verb=verb,
                                                   args=args, logfile=logfile)

    def _get_rule_footer(self, name):
        return MakeGenerator.GOAL_FOOTER_TMPL.format(goal=name)

    def _add_goal(self, outdir):
        if not os.path.exists(outdir):
            os.makedirs(outdir)

    def add_build_goal(self, name, directory, outdir, args):
        """Add a goal to invoke a Kbuild session

        @param name A unique string name for this build goal. The results
            dictionary returned by execute() will be keyed by this name.
        @param directory Absolute path to working directory, will be passed
            to make -C
        @param outdir Absolute path to output directory, will be passed to
            Kbuild via -O=<path>
        @param args Extra command line arguments to pass to 'make', typically
            environment variables or specific Make goals
        """
        self._add_goal(outdir)
        build_logfile = os.path.join(outdir, "build.log")
        text = (self._get_rule_header(name) +
                self._get_sub_make(name, "building", directory,
                                   outdir, build_logfile, args) +
                self._get_rule_footer(name))
        self.goals[name] = MakeGoal(name, text, None, self.logfile, build_logfile,
                                    None, None)

    def add_qemu_goal(self, name, directory, outdir, args, timeout=30):
        """Add a goal to build a Zephyr project and then run it under QEMU

        The generated make goal invokes Make twice, the first time it will
        build the default goal, and the second will invoke the 'qemu' goal.
        The output of the QEMU session will be monitored, and terminated
        either upon pass/fail result of the test program, or the timeout
        is reached.

        @param name A unique string name for this build goal. The results
            dictionary returned by execute() will be keyed by this name.
        @param directory Absolute path to working directory, will be passed
            to make -C
        @param outdir Absolute path to output directory, will be passed to
            Kbuild via -O=<path>
        @param args Extra command line arguments to pass to 'make', typically
            environment variables. Do not pass specific Make goals here.
        @param timeout Maximum length of time QEMU session should be allowed
            to run before automatically killing it. Default is 30 seconds.
        """

        self._add_goal(outdir)
        build_logfile = os.path.join(outdir, "build.log")
        run_logfile = os.path.join(outdir, "run.log")
        qemu_logfile = os.path.join(outdir, "qemu.log")

        q = QEMUHandler(name, outdir, qemu_logfile, timeout)
        args.append("QEMU_PIPE=%s" % q.get_fifo())
        text = (self._get_rule_header(name) +
                self._get_sub_make(name, "building", directory,
                                   outdir, build_logfile, args) +
                self._get_sub_make(name, "running", directory,
                                   outdir, run_logfile,
                                   args + ["run"]) +
                self._get_rule_footer(name))
        self.goals[name] = MakeGoal(name, text, q, self.logfile, build_logfile,
                                    run_logfile, qemu_logfile)

    def add_unit_goal(self, name, directory, outdir, args, timeout=30, coverage=False):
        self._add_goal(outdir)
        build_logfile = os.path.join(outdir, "build.log")
        run_logfile = os.path.join(outdir, "run.log")
        qemu_logfile = os.path.join(outdir, "qemu.log")
        valgrind_logfile = os.path.join(outdir, "valgrind.log")
        if coverage:
                args += ["COVERAGE=1"]

        # we handle running in the UnitHandler class
        text = (self._get_rule_header(name) +
                self._get_sub_make(name, "building", directory,
                                   outdir, build_logfile, args) +
                self._get_rule_footer(name))
        q = UnitHandler(name, directory, outdir, run_logfile, valgrind_logfile, timeout)
        self.goals[name] = MakeGoal(name, text, q, self.logfile, build_logfile,
                                    run_logfile, valgrind_logfile)


    def add_test_instance(self, ti, build_only=False, enable_slow=False, coverage=False,
                          extra_args=[]):
        """Add a goal to build/test a TestInstance object

        @param ti TestInstance object to build. The status dictionary returned
            by execute() will be keyed by its .name field.
        """
        args = ti.test.extra_args[:]
        args.extend(["ARCH=%s" % ti.platform.arch.name,
                     "BOARD=%s" % ti.platform.name])
        args.extend(extra_args)
        if (ti.platform.qemu_support and (not ti.build_only) and
            (not build_only) and (enable_slow or not ti.test.slow)):
            self.add_qemu_goal(ti.name, ti.test.code_location, ti.outdir,
                               args, ti.test.timeout)
        elif ti.test.type == "unit":
            self.add_unit_goal(ti.name, ti.test.code_location, ti.outdir,
                               args, ti.test.timeout, coverage)
        else:
            self.add_build_goal(ti.name, ti.test.code_location, ti.outdir, args)

    def execute(self, callback_fn=None, context=None):
        """Execute all the registered build goals

        @param callback_fn If not None, a callback function will be called
            as individual goals transition between states. This function
            should accept two parameters: a string state and an arbitrary
            context object, supplied here
        @param context Context object to pass to the callback function.
            Type and semantics are specific to that callback function.
        @return A dictionary mapping goal names to final status.
        """

        with open(self.makefile, "wt") as tf, \
                open(os.devnull, "wb") as devnull, \
                open(self.logfile, "wt") as make_log:
            # Create our dynamic Makefile and execute it.
            # Watch stderr output which is where we will keep
            # track of build state
            for name, goal in self.goals.items():
                tf.write(goal.text)
            tf.write("all: %s\n" % (" ".join(self.goals.keys())))
            tf.flush()

            cmd = ["make", "-k", "-j", str(CPU_COUNTS * 2), "-f", tf.name, "all"]
            p = subprocess.Popen(cmd, stderr=subprocess.PIPE,
                                 stdout=devnull)

            for line in iter(p.stderr.readline, b''):
                line = line.decode("utf-8")
                make_log.write(line)
                verbose("MAKE: " + repr(line.strip()))
                m = MakeGenerator.re_make.match(line)
                if not m:
                    continue

                state, name, _, error = m.groups()
                if error:
                    goal = self.goals[error]
                else:
                    goal = self.goals[name]
                    goal.make_state = state


                if error:
                    # Sometimes QEMU will run an image and then crash out, which
                    # will cause the 'make qemu' invocation to exit with
                    # nonzero status.
                    # Need to distinguish this case from a compilation failure.
                    if goal.qemu:
                        goal.fail("qemu_crash")
                    else:
                        goal.fail("build_error")
                else:
                    if state == "finished":
                        if goal.qemu:
                            if goal.qemu.unit:
                                # We can't run unit tests with Make
                                goal.qemu.handle()
                                if goal.qemu.returncode == 2:
                                    goal.qemu_log = goal.qemu.valgrind_log
                                elif goal.qemu.returncode:
                                    goal.qemu_log = goal.qemu.run_log
                            thread_status, metrics = goal.qemu.get_state()
                            goal.metrics.update(metrics)
                            if thread_status == "passed":
                                goal.success()
                            else:
                                goal.fail(thread_status)
                        else:
                            goal.success()

                if callback_fn:
                    callback_fn(context, self.goals, goal)

            p.wait()
        return self.goals


# "list" - List of strings
# "list:<type>" - List of <type>
# "set" - Set of unordered, unique strings
# "set:<type>" - Set of <type>
# "float" - Floating point
# "int" - Integer
# "bool" - Boolean
# "str" - String

# XXX Be sure to update __doc__ if you change any of this!!

arch_valid_keys = {"name" : {"type" : "str", "required" : True},
                   "platforms" : {"type" : "list", "required" : True},
                   "supported_toolchains" : {"type" : "list", "required" : True}}

platform_valid_keys = {"qemu_support" : {"type" : "bool", "default" : False},
                       "supported_toolchains" : {"type" : "list", "default" : []}}

testcase_valid_keys = {"tags" : {"type" : "set", "required" : True},
                       "type" : {"type" : "str", "default": "integration"},
                       "extra_args" : {"type" : "list"},
                       "build_only" : {"type" : "bool", "default" : False},
                       "skip" : {"type" : "bool", "default" : False},
                       "slow" : {"type" : "bool", "default" : False},
                       "timeout" : {"type" : "int", "default" : 60},
                       "arch_whitelist" : {"type" : "set"},
                       "arch_exclude" : {"type" : "set"},
                       "extra_sections" : {"type" : "list", "default" : []},
                       "platform_exclude" : {"type" : "set"},
                       "platform_whitelist" : {"type" : "set"},
                       "filter" : {"type" : "str"}}


class SanityConfigParser:
    """Class to read architecture and test case .ini files with semantic checking
    """
    def __init__(self, filename):
        """Instantiate a new SanityConfigParser object

        @param filename Source .ini file to read
        """
        cp = configparser.SafeConfigParser()
        cp.readfp(open(filename))
        self.filename = filename
        self.cp = cp

    def _cast_value(self, value, typestr):
        v = value.strip()
        if typestr == "str":
            return v

        elif typestr == "float":
            return float(v)

        elif typestr == "int":
            return int(v)

        elif typestr == "bool":
            v = v.lower()
            if v == "true" or v == "1":
                return True
            elif v == "" or v == "false" or v == "0":
                return False
            raise ConfigurationError(self.filename,
                                     "bad value for boolean: '%s'" % value)

        elif typestr.startswith("list"):
            vs = v.split()
            if len(typestr) > 4 and typestr[4] == ":":
                return [self._cast_value(vsi, typestr[5:]) for vsi in vs]
            else:
                return vs

        elif typestr.startswith("set"):
            vs = v.split()
            if len(typestr) > 3 and typestr[3] == ":":
                return set([self._cast_value(vsi, typestr[4:]) for vsi in vs])
            else:
                return set(vs)

        else:
            raise ConfigurationError(self.filename, "unknown type '%s'" % value)


    def sections(self):
        """Get the set of sections within the .ini file

        @return a list of string section names"""
        return self.cp.sections()

    def get_section(self, section, valid_keys):
        """Get a dictionary representing the keys/values within a section

        @param section The section in the .ini file to retrieve data from
        @param valid_keys A dictionary representing the intended semantics
            for this section. Each key in this dictionary is a key that could
            be specified, if a key is given in the .ini file which isn't in
            here, it will generate an error. Each value in this dictionary
            is another dictionary containing metadata:

                "default" - Default value if not given
                "type" - Data type to convert the text value to. Simple types
                    supported are "str", "float", "int", "bool" which will get
                    converted to respective Python data types. "set" and "list"
                    may also be specified which will split the value by
                    whitespace (but keep the elements as strings). finally,
                    "list:<type>" and "set:<type>" may be given which will
                    perform a type conversion after splitting the value up.
                "required" - If true, raise an error if not defined. If false
                    and "default" isn't specified, a type conversion will be
                    done on an empty string
        @return A dictionary containing the section key-value pairs with
            type conversion and default values filled in per valid_keys
        """

        d = {}
        cp = self.cp

        if not cp.has_section(section):
            # Just fill it with defaults
            cp.add_section(section)

        for k, v in cp.items(section):
            if k not in valid_keys:
                raise ConfigurationError(self.filename,
                                         "Unknown config key '%s' in definition for '%s'"
                                         % (k, section))
            d[k] = v

        for k, kinfo in valid_keys.items():
            if k not in d:
                if "required" in kinfo:
                    required = kinfo["required"]
                else:
                    required = False

                if required:
                    raise ConfigurationError(self.filename,
                                             "missing required value for '%s' in section '%s'"
                                             % (k, section))
                else:
                    if "default" in kinfo:
                        default = kinfo["default"]
                    else:
                        default = self._cast_value("", kinfo["type"])
                    d[k] = default
            else:
                try:
                    d[k] = self._cast_value(d[k], kinfo["type"])
                except ValueError as ve:
                    raise ConfigurationError(self.filename,
                                             "bad %s value '%s' for key '%s' in section '%s'"
                                             % (kinfo["type"], d[k], k, section))

        return d


class Platform:
    """Class representing metadata for a particular platform

    Maps directly to BOARD when building"""
    def __init__(self, arch, name, plat_dict):
        """Constructor.

        @param arch Architecture object for this platform
        @param name String name for this platform, same as BOARD
        @param plat_dict SanityConfigParser output on the relevant section
            in the architecture configuration file which has lots of metadata.
            See the Architecture class.
        """
        self.name = name
        self.qemu_support = plat_dict["qemu_support"]
        self.arch = arch
        self.supported_toolchains = arch.supported_toolchains
        if plat_dict["supported_toolchains"]:
            self.supported_toolchains = plat_dict["supported_toolchains"]
        # Gets populated in a separate step
        self.defconfig = None
        pass

    def __repr__(self):
        return "<%s on %s>" % (self.name, self.arch.name)


class Architecture:
    """Class representing metadata for a particular architecture
    """
    def __init__(self, cfile):
        """Architecture constructor

        @param cfile Path to Architecture configuration file, which gives
            info about the arch and all the platforms for it
        """
        cp = SanityConfigParser(cfile)
        self.platforms = []

        arch = cp.get_section("arch", arch_valid_keys)

        self.name = arch["name"]
        self.supported_toolchains = arch["supported_toolchains"]

        for plat_name in arch["platforms"]:
            verbose("Platform: %s" % plat_name)
            plat_dict = cp.get_section(plat_name, platform_valid_keys)
            self.platforms.append(Platform(self, plat_name, plat_dict))

    def __repr__(self):
        return "<arch %s>" % self.name


class TestCase:
    """Class representing a test application
    """
    def __init__(self, testcase_root, workdir, name, tc_dict, inifile):
        """TestCase constructor.

        This gets called by TestSuite as it finds and reads testcase.ini files.
        Multiple TestCase instances may be generated from a single testcase.ini,
        each one corresponds to a section within that file.

        We need to have a unique name for every single test case. Since
        a testcase.ini can define multiple tests, the canonical name for
        the test case is <workdir>/<name>.

        @param testcase_root Absolute path to the root directory where
            all the test cases live
        @param workdir Relative path to the project directory for this
            test application from the test_case root.
        @param name Name of this test case, corresponding to the section name
            in the test case configuration file. For many test cases that just
            define one test, can be anything and is usually "test". This is
            really only used to distinguish between different cases when
            the testcase.ini defines multiple tests
        @param tc_dict Dictionary with section values for this test case
            from the testcase.ini file
        """
        self.code_location = os.path.join(testcase_root, workdir)
        self.type = tc_dict["type"]
        self.tags = tc_dict["tags"]
        self.extra_args = tc_dict["extra_args"]
        self.arch_whitelist = tc_dict["arch_whitelist"]
        self.arch_exclude = tc_dict["arch_exclude"]
        self.skip = tc_dict["skip"]
        self.platform_exclude = tc_dict["platform_exclude"]
        self.platform_whitelist = tc_dict["platform_whitelist"]
        self.tc_filter = tc_dict["filter"]
        self.timeout = tc_dict["timeout"]
        self.build_only = tc_dict["build_only"]
        self.slow = tc_dict["slow"]
        self.extra_sections = tc_dict["extra_sections"]
        self.path = os.path.join(os.path.basename(os.path.abspath(testcase_root)),
                                 workdir, name)
        self.name = self.path # for now
        self.defconfig = {}
        self.inifile = inifile

    def __repr__(self):
        return self.name


class TestInstance:
    """Class representing the execution of a particular TestCase on a platform

    @param test The TestCase object we want to build/execute
    @param platform Platform object that we want to build and run against
    @param base_outdir Base directory for all test results. The actual
        out directory used is <outdir>/<platform>/<test case name>
    """
    def __init__(self, test, platform, base_outdir, build_only=False,
                 slow=False, coverage=False):
        self.test = test
        self.platform = platform
        self.name = os.path.join(platform.name, test.path)
        self.outdir = os.path.join(base_outdir, platform.name, test.path)
        self.build_only = build_only or test.build_only

    def calculate_sizes(self):
        """Get the RAM/ROM sizes of a test case.

        This can only be run after the instance has been executed by
        MakeGenerator, otherwise there won't be any binaries to measure.

        @return A SizeCalculator object
        """
        fns = glob.glob(os.path.join(self.outdir, "*.elf"))
        fns = [x for x in fns if not x.endswith('_prebuilt.elf')]
        if (len(fns) != 1):
            raise BuildError("Missing/multiple output ELF binary")
        return SizeCalculator(fns[0], self.test.extra_sections)

    def __repr__(self):
        return "<TestCase %s on %s>" % (self.test.name, self.platform.name)


def defconfig_cb(context, goals, goal):
    if not goal.failed:
        return


    info("%sCould not build defconfig for %s%s" %
         (COLOR_RED, goal.name, COLOR_NORMAL));
    if INLINE_LOGS:
        with open(goal.get_error_log()) as fp:
            data = fp.read()
            sys.stdout.write(data)
            if log_file:
                log_file.write(data)
    else:
        info("\tsee: " + COLOR_YELLOW + goal.get_error_log() + COLOR_NORMAL)


class TestSuite:
    config_re = re.compile('(CONFIG_[A-Za-z0-9_]+)[=]\"?([^\"]*)\"?$')

    def __init__(self, arch_root, testcase_roots, outdir, coverage):
        # Keep track of which test cases we've filtered out and why
        discards = {}
        self.arches = {}
        self.testcases = {}
        self.platforms = []
        self.outdir = os.path.abspath(outdir)
        self.instances = {}
        self.goals = None
        self.discards = None
        self.coverage = coverage

        arch_root = os.path.abspath(arch_root)

        for testcase_root in testcase_roots:
            testcase_root = os.path.abspath(testcase_root)

            debug("Reading test case configuration files under %s..." %
                  testcase_root)
            for dirpath, dirnames, filenames in os.walk(testcase_root,
                                                        topdown=True):
                verbose("scanning %s" % dirpath)
                if "testcase.ini" in filenames:
                    verbose("Found test case in " + dirpath)
                    dirnames[:] = []
                    ini_path = os.path.join(dirpath, "testcase.ini")
                    cp = SanityConfigParser(ini_path)
                    workdir = os.path.relpath(dirpath, testcase_root)

                    for section in cp.sections():
                        tc_dict = cp.get_section(section, testcase_valid_keys)
                        tc = TestCase(testcase_root, workdir, section, tc_dict,
                                      ini_path)
                        self.testcases[tc.name] = tc

        debug("Reading architecture configuration files under %s..." % arch_root)
        for dirpath, dirnames, filenames in os.walk(arch_root):
            for filename in filenames:
                if filename.endswith(".ini"):
                    fn = os.path.join(dirpath, filename)
                    verbose("Found arch configuration " + fn)
                    arch = Architecture(fn)
                    self.arches[arch.name] = arch
                    self.platforms.extend(arch.platforms)

        # Build up a list of boards based on the presence of
        # boards/*/*_defconfig files. We want to make sure that the arch.ini
        # files are not missing any boards
        all_plats = [plat.name for plat in self.platforms]
        for dirpath, dirnames, filenames in os.walk(os.path.join(ZEPHYR_BASE,
                                                                 "boards")):
            for filename in filenames:
                if filename.endswith("_defconfig"):
                    board_name = filename.replace("_defconfig", "")
                    if board_name not in all_plats:
                        error("Platform '%s' not specified in any arch .ini file and will not be tested"
                                % board_name)
        self.instances = {}

    def get_last_failed(self):
        if not os.path.exists(LAST_SANITY):
            raise SanityRuntimeError("Couldn't find last sanity run.")
        result = []
        with open(LAST_SANITY, "r") as fp:
            cr = csv.DictReader(fp)
            for row in cr:
                if row["passed"] == "True":
                    continue
                test = row["test"]
                platform = row["platform"]
                result.append((test, platform))
        return result

    def apply_filters(self, platform_filter, arch_filter, tag_filter, exclude_tag,
                      config_filter, testcase_filter, last_failed, all_plats,
                      platform_limit, toolchain, extra_args, enable_ccache):
        instances = []
        discards = {}
        verbose("platform filter: " + str(platform_filter))
        verbose("    arch_filter: " + str(arch_filter))
        verbose("     tag_filter: " + str(tag_filter))
        verbose("    exclude_tag: " + str(exclude_tag))
        verbose("  config_filter: " + str(config_filter))
        verbose("  enable_ccache: " + str(enable_ccache))

        if last_failed:
            failed_tests = self.get_last_failed()

        default_platforms = False

        if all_plats:
            info("Selecting all possible platforms per test case")
            # When --all used, any --platform arguments ignored
            platform_filter = []
        elif not platform_filter:
            info("Selecting default platforms per test case")
            default_platforms = True

        mg = MakeGenerator(self.outdir, ccache=enable_ccache)
        dlist = {}
        for tc_name, tc in self.testcases.items():
            for arch_name, arch in self.arches.items():
                instance_list = []
                for plat in arch.platforms:
                    instance = TestInstance(tc, plat, self.outdir)

                    if (arch_name == "unit") != (tc.type == "unit"):
                        continue

                    if tc.skip:
                        continue

                    if tag_filter and not tc.tags.intersection(tag_filter):
                        continue

                    if exclude_tag and tc.tags.intersection(exclude_tag):
                        continue

                    if testcase_filter and tc_name not in testcase_filter:
                        continue

                    if last_failed and (tc.name, plat.name) not in failed_tests:
                        continue

                    if arch_filter and arch_name not in arch_filter:
                        continue

                    if tc.arch_whitelist and arch.name not in tc.arch_whitelist:
                        continue

                    if tc.arch_exclude and arch.name in tc.arch_exclude:
                        continue

                    if tc.platform_exclude and plat.name in tc.platform_exclude:
                        continue

                    if platform_filter and plat.name not in platform_filter:
                        continue

                    if tc.platform_whitelist and plat.name not in tc.platform_whitelist:
                        continue

                    if tc.tc_filter and (plat in arch.platforms[:platform_limit] or all_plats or platform_filter):
                        args = tc.extra_args[:]
                        args.extend(["ARCH=" + plat.arch.name,
                                "BOARD=" + plat.name, "config-sanitycheck"])
                        args.extend(extra_args)
                        # FIXME would be nice to use a common outdir for this so that
                        # conf, gen_idt, etc aren't rebuilt for every  combination,
                        # need a way to avoid different Make processes from clobbering
                        # each other since they all try to build them simultaneously

                        o = os.path.join(self.outdir, plat.name, tc.path)
                        dlist[tc, plat, tc.name.split("/")[-1]] = os.path.join(o,".config-sanitycheck")
                        goal = "_".join([plat.name, "_".join(tc.name.split("/")), "config-sanitycheck"])
                        mg.add_build_goal(goal, os.path.join(ZEPHYR_BASE, tc.code_location), o, args)

        info("Building testcase defconfigs...")
        results = mg.execute(defconfig_cb)

        for name, goal in results.items():
            if goal.failed:
                raise SanityRuntimeError("Couldn't build some defconfigs")

        for k, out_config in dlist.items():
            test, plat, name = k
            defconfig = {}
            with open(out_config, "r") as fp:
                for line in fp.readlines():
                    m = TestSuite.config_re.match(line)
                    if not m:
                        if line.strip() and not line.startswith("#"):
                            sys.stderr.write("Unrecognized line %s\n" % line)
                        continue
                    defconfig[m.group(1)] = m.group(2).strip()
            test.defconfig[plat] = defconfig

        for tc_name, tc in self.testcases.items():
            for arch_name, arch in self.arches.items():
                instance_list = []
                for plat in arch.platforms:
                    instance = TestInstance(tc, plat, self.outdir)

                    if (arch_name == "unit") != (tc.type == "unit"):
                        # Discard silently
                        continue

                    if tc.skip:
                        discards[instance] = "Skip filter"
                        continue

                    if tag_filter and not tc.tags.intersection(tag_filter):
                        discards[instance] = "Command line testcase tag filter"
                        continue

                    if exclude_tag and tc.tags.intersection(exclude_tag):
                        discards[instance] = "Command line testcase exclude filter"
                        continue

                    if testcase_filter and tc_name not in testcase_filter:
                        discards[instance] = "Testcase name filter"
                        continue

                    if last_failed and (tc.name, plat.name) not in failed_tests:
                        discards[instance] = "Passed or skipped during last run"
                        continue

                    if arch_filter and arch_name not in arch_filter:
                        discards[instance] = "Command line testcase arch filter"
                        continue

                    if tc.arch_whitelist and arch.name not in tc.arch_whitelist:
                        discards[instance] = "Not in test case arch whitelist"
                        continue

                    if tc.arch_exclude and arch.name in tc.arch_exclude:
                        discards[instance] = "In test case arch exclude"
                        continue

                    if tc.platform_exclude and plat.name in tc.platform_exclude:
                        discards[instance] = "In test case platform exclude"
                        continue

                    if platform_filter and plat.name not in platform_filter:
                        discards[instance] = "Command line platform filter"
                        continue

                    if tc.platform_whitelist and plat.name not in tc.platform_whitelist:
                        discards[instance] = "Not in testcase platform whitelist"
                        continue

                    if toolchain and toolchain not in plat.supported_toolchains:
                        discards[instance] = "Not supported by the toolchain"
                        continue

                    defconfig = {"ARCH" : arch.name, "PLATFORM" : plat.name}
                    defconfig.update(os.environ)
                    for p, tdefconfig in tc.defconfig.items():
                        if p == plat:
                            defconfig.update(tdefconfig)
                            break

                    if tc.tc_filter:
                        try:
                            res = expr_parser.parse(tc.tc_filter, defconfig)
                        except (ValueError, SyntaxError) as se:
                            sys.stderr.write("Failed processing %s\n" % tc.inifile)
                            raise se
                        if not res:
                            discards[instance] = ("defconfig doesn't satisfy expression '%s'" %
                                    tc.tc_filter)
                            continue

                    instance_list.append(instance)

                if not instance_list:
                    # Every platform in this arch was rejected already
                    continue

                if default_platforms:
                    self.add_instances(instance_list[:platform_limit])
                    for instance in instance_list[platform_limit:]:
                        discards[instance] = "Not in first %d platform(s) for arch" % platform_limit
                else:
                    self.add_instances(instance_list)
        self.discards = discards
        return discards

    def add_instances(self, ti_list):
        for ti in ti_list:
            self.instances[ti.name] = ti

    def execute(self, cb, cb_context, build_only, enable_slow, enable_asserts, enable_deprecations,
                extra_args, enable_ccache):

        def calc_one_elf_size(name, goal):
            if not goal.failed:
                i = self.instances[name]
                sc = i.calculate_sizes()
                goal.metrics["ram_size"] = sc.get_ram_size()
                goal.metrics["rom_size"] = sc.get_rom_size()
                goal.metrics["unrecognized"] = sc.unrecognized_sections()

        mg = MakeGenerator(self.outdir, asserts=enable_asserts, deprecations=enable_deprecations,
                ccache=enable_ccache)
        for i in self.instances.values():
            mg.add_test_instance(i, build_only, enable_slow, self.coverage, extra_args)
        self.goals = mg.execute(cb, cb_context)

        # Parallelize size calculation
        executor = concurrent.futures.ThreadPoolExecutor(CPU_COUNTS)
        futures = [executor.submit(calc_one_elf_size, name, goal) \
                        for name, goal in self.goals.items()]
        concurrent.futures.wait(futures)

        return self.goals

    def discard_report(self, filename):
        if self.discards == None:
            raise SanityRuntimeException("apply_filters() hasn't been run!")

        with open(filename, "wb") as csvfile:
            fieldnames = ["test", "arch", "platform", "reason"]
            cw = csv.DictWriter(csvfile, fieldnames, lineterminator=os.linesep)
            cw.writeheader()
            for instance, reason in self.discards.items():
                rowdict = {"test" : i.test.name,
                           "arch" : i.platform.arch.name,
                           "platform" : i.platform.name,
                           "reason" : reason}
                cw.writerow(rowdict)

    def compare_metrics(self, filename):
        # name, datatype, lower results better
        interesting_metrics = [("ram_size", int, True),
                               ("rom_size", int, True)]

        if self.goals == None:
            raise SanityRuntimeException("execute() hasn't been run!")

        if not os.path.exists(filename):
            info("Cannot compare metrics, %s not found" % filename)
            return []

        results = []
        saved_metrics = {}
        with open(filename) as fp:
            cr = csv.DictReader(fp)
            for row in cr:
                d = {}
                for m, _, _ in interesting_metrics:
                    d[m] = row[m]
                saved_metrics[(row["test"], row["platform"])] = d

        for name, goal in self.goals.items():
            i = self.instances[name]
            mkey = (i.test.name, i.platform.name)
            if mkey not in saved_metrics:
                continue
            sm = saved_metrics[mkey]
            for metric, mtype, lower_better in interesting_metrics:
                if metric not in goal.metrics:
                    continue
                if sm[metric] == "":
                    continue
                delta = goal.metrics[metric] - mtype(sm[metric])
                if delta == 0:
                    continue
                results.append((i, metric, goal.metrics[metric], delta,
                                lower_better))
        return results

    def testcase_xunit_report(self, filename, duration, args):
        if self.goals == None:
            raise SanityRuntimeException("execute() hasn't been run!")

        fails = 0
        passes = 0
        errors = 0

        for name, goal in self.goals.items():
            if goal.failed:
                if goal.reason in ['build_error', 'qemu_crash']:
                    errors += 1
                else:
                    fails += 1
            else:
                passes += 1

        run = "Sanitycheck"
        eleTestsuite = None
        append = args.only_failed

        if os.path.exists(filename) and append:
            tree = ET.parse(filename)
            eleTestsuites = tree.getroot()
            eleTestsuite =  tree.findall('testsuite')[0];
        else:
            eleTestsuites = ET.Element('testsuites')
            eleTestsuite = ET.SubElement(eleTestsuites, 'testsuite', name=run, time="%d" %duration,
                    tests="%d" %(errors + passes + fails),  failures="%d" %fails,  errors="%d" %errors, skip="0")

        qemu_time = "0"
        for name, goal in self.goals.items():

            i = self.instances[name]
            if append:
                for tc in eleTestsuite.findall('testcase'):
                    if tc.get('classname') == "%s:%s" %(i.platform.name, i.test.name):
                        eleTestsuite.remove(tc)

            if not goal.failed and goal.qemu:
                    qemu_time = "%s" %(goal.metrics["qemu_time"])

            eleTestcase = ET.SubElement(eleTestsuite, 'testcase', classname="%s:%s" %(i.platform.name, i.test.name), name="%s" %(name), time=qemu_time)
            if goal.failed:
                failure = ET.SubElement(eleTestcase, 'failure', type="failure", message=goal.reason)
                p = ("%s/%s/%s" %(args.outdir, i.platform.name, i.test.name))
                bl = os.path.join(p, "build.log")
                if goal.reason != 'build_error':
                    bl = os.path.join(p, "qemu.log")

                if os.path.exists(bl):
                    with open(bl, "r") as f:
                        log = f.read()
                        ansi_escape = re.compile(r'\x1b[^m]*m')
                        output = ansi_escape.sub('', str(log))
                        failure.text = (escape(output))

        result = ET.tostring(eleTestsuites)
        f = open(filename, 'wb')
        f.write(result)
        f.close()

    def testcase_report(self, filename):
        if self.goals == None:
            raise SanityRuntimeException("execute() hasn't been run!")

        with open(filename, "wt") as csvfile:
            fieldnames = ["test", "arch", "platform", "passed", "status",
                          "extra_args", "qemu", "qemu_time", "ram_size",
                          "rom_size"]
            cw = csv.DictWriter(csvfile, fieldnames, lineterminator=os.linesep)
            cw.writeheader()
            for name, goal in self.goals.items():
                i = self.instances[name]
                rowdict = {"test" : i.test.name,
                           "arch" : i.platform.arch.name,
                           "platform" : i.platform.name,
                           "extra_args" : " ".join(i.test.extra_args),
                           "qemu" : i.platform.qemu_support}
                if goal.failed:
                    rowdict["passed"] = False
                    rowdict["status"] = goal.reason
                else:
                    rowdict["passed"] = True
                    if goal.qemu:
                        rowdict["qemu_time"] = goal.metrics["qemu_time"]
                    rowdict["ram_size"] = goal.metrics["ram_size"]
                    rowdict["rom_size"] = goal.metrics["rom_size"]
                cw.writerow(rowdict)


def parse_arguments():

    parser = argparse.ArgumentParser(description = __doc__,
                                     formatter_class = argparse.RawDescriptionHelpFormatter)
    parser.fromfile_prefix_chars = "+"

    parser.add_argument("-p", "--platform", action="append",
            help="Platform filter for testing. This option may be used multiple "
                 "times. Testcases will only be built/run on the platforms "
                 "specified. If this option is not used, then N platforms will "
                 "automatically be chosen from each arch to build and test, "
                 "where N is provided by the --platform-limit option.")
    parser.add_argument("-L", "--platform-limit", action="store", type=int,
            metavar="N", default=1,
            help="Controls what platforms are tested if --platform or "
                 "--all are not used. For each architecture specified by "
                 "--arch (defaults to all of them), choose the first "
                 "N platforms to test in the arch-specific .ini file "
                 "'platforms' list. Defaults to 1.")
    parser.add_argument("-a", "--arch", action="append",
            help="Arch filter for testing. Takes precedence over --platform. "
                 "If unspecified, test all arches. Multiple invocations "
                 "are treated as a logical 'or' relationship")
    parser.add_argument("-t", "--tag", action="append",
            help="Specify tags to restrict which tests to run by tag value. "
                 "Default is to not do any tag filtering. Multiple invocations "
                 "are treated as a logical 'or' relationship")
    parser.add_argument("-e", "--exclude-tag", action="append",
            help="Specify tags of tests that should not run. "
                 "Default is to run all tests with all tags.")
    parser.add_argument("-f", "--only-failed", action="store_true",
            help="Run only those tests that failed the previous sanity check "
                 "invocation.")
    parser.add_argument("-c", "--config", action="append",
            help="Specify platform configuration values filtering. This can be "
                 "specified two ways: <config>=<value> or just <config>. The "
                 "defconfig for all platforms will be "
                 "checked. For the <config>=<value> case, only match defconfig "
                 "that have that value defined. For the <config> case, match "
                 "defconfig that have that value assigned to any value. "
                 "Prepend a '!' to invert the match.")
    parser.add_argument("-s", "--test", action="append",
            help="Run only the specified test cases. These are named by "
                 "<path to test project relative to "
                 "--testcase-root>/<testcase.ini section name>")
    parser.add_argument("-l", "--all", action="store_true",
            help="Build/test on all platforms. Any --platform arguments "
                 "ignored.")

    parser.add_argument("-o", "--testcase-report",
            help="Output a CSV spreadsheet containing results of the test run")
    parser.add_argument("-d", "--discard-report",
            help="Output a CSV spreadsheet showing tests that were skipped "
                 "and why")
    parser.add_argument("--compare-report",
            help="Use this report file for size comparison")

    parser.add_argument("--ccache", action="store_const", const=1, default=0,
            help="Enable the use of ccache when building")

    parser.add_argument("-B", "--subset",
            help="Only run a subset of the tests, 1/4 for running the first 25%%, "
                 "3/5 means run the 3rd fifth of the total. "
                 "This option is useful when running a large number of tests on "
                 "different hosts to speed up execution time.")
    parser.add_argument("-y", "--dry-run", action="store_true",
            help="Create the filtered list of test cases, but don't actually "
                 "run them. Useful if you're just interested in "
                 "--discard-report")

    parser.add_argument("-r", "--release", action="store_true",
            help="Update the benchmark database with the results of this test "
                 "run. Intended to be run by CI when tagging an official "
                 "release. This database is used as a basis for comparison "
                 "when looking for deltas in metrics such as footprint")
    parser.add_argument("-w", "--warnings-as-errors", action="store_true",
            help="Treat warning conditions as errors")
    parser.add_argument("-v", "--verbose", action="count", default=0,
            help="Emit debugging information, call multiple times to increase "
                 "verbosity")
    parser.add_argument("-i", "--inline-logs", action="store_true",
            help="Upon test failure, print relevant log data to stdout "
                 "instead of just a path to it")
    parser.add_argument("--log-file", metavar="FILENAME", action="store",
            help="log also to file")
    parser.add_argument("-m", "--last-metrics", action="store_true",
            help="Instead of comparing metrics from the last --release, "
                 "compare with the results of the previous sanity check "
                 "invocation")
    parser.add_argument("-u", "--no-update", action="store_true",
            help="do not update the results of the last run of the sanity "
                 "checks")
    parser.add_argument("-b", "--build-only", action="store_true",
            help="Only build the code, do not execute any of it in QEMU")
    parser.add_argument("-j", "--jobs", type=int,
            help="Number of cores to use when building, defaults to "
                 "number of CPUs * 2")
    parser.add_argument("-H", "--footprint-threshold", type=float, default=5,
            help="When checking test case footprint sizes, warn the user if "
                 "the new app size is greater then the specified percentage "
                 "from the last release. Default is 5. 0 to warn on any "
                 "increase on app size")
    parser.add_argument("-D", "--all-deltas", action="store_true",
            help="Show all footprint deltas, positive or negative. Implies "
                "--footprint-threshold=0")
    parser.add_argument("-O", "--outdir",
            default="%s/sanity-out" % ZEPHYR_BASE,
            help="Output directory for logs and binaries.")
    parser.add_argument("-n", "--no-clean", action="store_true",
            help="Do not delete the outdir before building. Will result in "
                 "faster compilation since builds will be incremental")
    parser.add_argument("-T", "--testcase-root", action="append", default=[],
            help="Base directory to recursively search for test cases. All "
                 "testcase.ini files under here will be processed. May be "
                 "called multiple times. Defaults to the 'samples' and "
                 "'tests' directories in the Zephyr tree.")
    parser.add_argument("-A", "--arch-root",
            default="%s/scripts/sanity_chk/arches" % ZEPHYR_BASE,
            help="Directory to search for arch configuration files. All .ini "
                 "files in the directory will be processed.")
    parser.add_argument("-z", "--size", action="append",
            help="Don't run sanity  checks. Instead, produce a report to "
                 "stdout detailing RAM/ROM sizes on the specified filenames. "
                 "All other command line arguments ignored.")
    parser.add_argument("-S", "--enable-slow", action="store_true",
            help="Execute time-consuming test cases that have been marked "
                 "as 'slow' in testcase.ini. Normally these are only built.")
    parser.add_argument("-R", "--enable-asserts", action="store_true",
            help="Build all test cases with assertions enabled.")
    parser.add_argument("-Q", "--error-on-deprecations", action="store_false",
            help="Error on deprecation warnings.")
    parser.add_argument("-x", "--extra-args", action="append", default=[],
            help="Extra arguments to pass to the build when compiling test "
                 "cases. May be called multiple times. These will be passed "
                 "in after any sanitycheck-supplied options.")
    parser.add_argument("-C", "--coverage", action="store_true",
            help="Scan for unit test coverage with gcov + lcov.")

    return parser.parse_args()

def log_info(filename):
    filename = os.path.relpath(os.path.realpath(filename))
    if INLINE_LOGS:
        info("{:-^100}".format(filename))

        try:
            with open(filename) as fp:
                data = fp.read()
        except Exception as e:
            data = "Unable to read log data (%s)\n" % (str(e))

        sys.stdout.write(data)
        if log_file:
            log_file.write(data)
        info("{:-^100}".format(filename))
    else:
        info("\tsee: " + COLOR_YELLOW + filename + COLOR_NORMAL)

def terse_test_cb(instances, goals, goal):
    total_tests = len(goals)
    total_done = 0
    total_failed = 0

    for k, g in goals.items():
        if g.finished:
            total_done += 1
        if g.failed:
            total_failed += 1

    if goal.failed:
        i = instances[goal.name]
        info("\n\n{:<25} {:<50} {}FAILED{}: {}".format(i.platform.name,
             i.test.name, COLOR_RED, COLOR_NORMAL, goal.reason))
        log_info(goal.get_error_log())
        info("")

    sys.stdout.write("\rtotal complete: %s%4d/%4d%s  %2d%%  failed: %s%4d%s" % (
                     COLOR_GREEN, total_done, total_tests, COLOR_NORMAL,
                     int((float(total_done) / total_tests) * 100),
                     COLOR_RED if total_failed > 0 else COLOR_NORMAL,
                     total_failed, COLOR_NORMAL))
    sys.stdout.flush()

def chatty_test_cb(instances, goals, goal):
    i = instances[goal.name]

    if VERBOSE < 2 and not goal.finished:
        return

    if goal.failed:
        status = COLOR_RED + "FAILED" + COLOR_NORMAL + ": " + goal.reason
    elif goal.finished:
        status = COLOR_GREEN + "PASSED" + COLOR_NORMAL
    else:
        status = goal.make_state

    info("{:<25} {:<50} {}".format(i.platform.name, i.test.name, status))
    if goal.failed:
        log_info(goal.get_error_log())


def size_report(sc):
    info(sc.filename)
    info("SECTION NAME             VMA        LMA     SIZE  HEX SZ TYPE")
    for i in range(len(sc.sections)):
        v = sc.sections[i]

        info("%-17s 0x%08x 0x%08x %8d 0x%05x %-7s" %
             (v["name"], v["virt_addr"], v["load_addr"], v["size"], v["size"],
              v["type"]))

    info("Totals: %d bytes (ROM), %d bytes (RAM)" %
             (sc.rom_size, sc.ram_size))
    info("")

def generate_coverage(outdir, ignores):
    with open(os.path.join(outdir, "coverage.log"), "a") as coveragelog:
        coveragefile = os.path.join(outdir, "coverage.info")
        ztestfile = os.path.join(outdir, "ztest.info")
        subprocess.call(["lcov", "--capture", "--directory", outdir,
                         "--output-file", coveragefile], stdout=coveragelog)
        # We want to remove tests/* and tests/ztest/test/* but save tests/ztest
        subprocess.call(["lcov", "--extract", coveragefile,
                        os.path.join(ZEPHYR_BASE, "tests", "ztest", "*"),
                        "--output-file", ztestfile], stdout=coveragelog)
        subprocess.call(["lcov", "--remove", ztestfile,
                        os.path.join(ZEPHYR_BASE, "tests/ztest/test/*"),
                        "--output-file", ztestfile], stdout=coveragelog)
        for i in ignores:
            subprocess.call(["lcov", "--remove", coveragefile, i,
                            "--output-file", coveragefile], stdout=coveragelog)
        subprocess.call(["genhtml", "-output-directory",
                        os.path.join(outdir, "coverage"),
                        coveragefile, ztestfile], stdout=coveragelog)

def main():
    start_time = time.time()
    global VERBOSE, INLINE_LOGS, CPU_COUNTS, log_file
    args = parse_arguments()
    toolchain = os.environ.get("ZEPHYR_GCC_VARIANT", None)
    if toolchain == "zephyr":
        os.environ["DISABLE_TRYRUN"] = "1"

    if args.size:
        for fn in args.size:
            size_report(SizeCalculator(fn, []))
        sys.exit(0)

    VERBOSE += args.verbose
    INLINE_LOGS = args.inline_logs
    if args.log_file:
        log_file = open(args.log_file, "w")
    if args.jobs:
        CPU_COUNTS = args.jobs

    if args.subset:
        subset, sets = args.subset.split("/")
        if int(subset) > 0 and int(sets) >= int(subset):
            info("Running only a subset: %s/%s" %(subset,sets))
        else:
            error("You have provided a wrong subset value: %s." %args.subset)
            return

    if os.path.exists(args.outdir) and not args.no_clean:
        info("Cleaning output directory " + args.outdir)
        shutil.rmtree(args.outdir)

    if not args.testcase_root:
        args.testcase_root = [os.path.join(ZEPHYR_BASE, "tests"),
                              os.path.join(ZEPHYR_BASE, "samples")]

    ts = TestSuite(args.arch_root, args.testcase_root, args.outdir, args.coverage)
    discards = ts.apply_filters(args.platform, args.arch, args.tag, args.exclude_tag, args.config,
                                args.test, args.only_failed, args.all,
                                args.platform_limit, toolchain, args.extra_args, args.ccache)

    if args.discard_report:
        ts.discard_report(args.discard_report)

    if VERBOSE:
        for i, reason in discards.items():
            debug("{:<25} {:<50} {}SKIPPED{}: {}".format(i.platform.name,
                  i.test.name, COLOR_YELLOW, COLOR_NORMAL, reason))

    ts.instancets = OrderedDict(sorted(ts.instances.items(), key=lambda t: t[0]))

    if args.subset:
        subset, sets = args.subset.split("/")
        total = len(ts.instancets)
        per_set = round(total / int(sets))
        start = (int(subset) - 1 ) * per_set
        if subset == sets:
            end = total
        else:
            end = start + per_set

        sliced_instances = islice(ts.instancets.items(),start, end)
        ts.instances = OrderedDict(sliced_instances)

    info("%d tests selected, %d tests discarded due to filters" %
         (len(ts.instances), len(discards)))

    if args.dry_run:
        return

    if VERBOSE or not TERMINAL:
        goals = ts.execute(chatty_test_cb, ts.instances, args.build_only,
                           args.enable_slow, args.enable_asserts, args.error_on_deprecations,
                           args.extra_args, args.ccache)
    else:
        goals = ts.execute(terse_test_cb, ts.instances, args.build_only,
                           args.enable_slow, args.enable_asserts, args.error_on_deprecations,
                           args.extra_args, args.ccache)
        info("")

    # figure out which report to use for size comparison
    if args.compare_report:
        report_to_use = args.compare_report
    elif args.last_metrics:
        report_to_use = LAST_SANITY
    else:
        report_to_use = RELEASE_DATA

    deltas = ts.compare_metrics(report_to_use)
    warnings = 0
    if deltas:
        for i, metric, value, delta, lower_better in deltas:
            if not args.all_deltas and ((delta < 0 and lower_better) or
                                        (delta > 0 and not lower_better)):
                continue

            percentage = (float(delta) / float(value - delta))
            if not args.all_deltas and (percentage <
                                        (args.footprint_threshold / 100.0)):
                continue

            info("{:<25} {:<60} {}{}{}: {} {:<+4}, is now {:6} {:+.2%}".format(
                 i.platform.name, i.test.name, COLOR_YELLOW,
                 "INFO" if args.all_deltas else "WARNING", COLOR_NORMAL,
                 metric, delta, value, percentage))
            warnings += 1

    if warnings:
        info("Deltas based on metrics from last %s" %
             ("release" if not args.last_metrics else "run"))

    failed = 0
    for name, goal in goals.items():
        if goal.failed:
            failed += 1
        elif goal.metrics.get("unrecognized"):
            info("%sFAILED%s: %s has unrecognized binary sections: %s" %
                 (COLOR_RED, COLOR_NORMAL, goal.name,
                  str(goal.metrics["unrecognized"])))
            failed += 1

    if args.coverage:
        info("Generating coverage files...")
        generate_coverage(args.outdir, ["tests/*", "samples/*"])

    duration = time.time() - start_time
    info("%s%d of %d%s tests passed with %s%d%s warnings in %d seconds" %
          (COLOR_RED if failed else COLOR_GREEN, len(goals) - failed,
           len(goals), COLOR_NORMAL, COLOR_YELLOW if warnings else COLOR_NORMAL,
           warnings, COLOR_NORMAL, duration))

    if args.testcase_report:
        ts.testcase_report(args.testcase_report)
    if not args.no_update:
        ts.testcase_xunit_report(LAST_SANITY_XUNIT, duration, args)
        ts.testcase_report(LAST_SANITY)
    if args.release:
        ts.testcase_report(RELEASE_DATA)
    if log_file:
        log_file.close()
    if failed or (warnings and args.warnings_as_errors):
        sys.exit(1)

if __name__ == "__main__":
    main()