[nit.git] / contrib / nitester / src / nitester.nit

# This file is part of NIT (http://www.nitlanguage.org).
#
# Copyright 2014 Alexis Laferrière <alexis.laf@xymus.net>
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
#     http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.

# Tester of Nit engines on an MPI cluster
module nitester

import mpi
import signals
import opts

# Any processor, worker or controller
#
# All data and methods within this class are shared by the controller and the
# workers.
abstract class Processor
        super SignalHandler

        # Controller rank is always 0
        var controller_rank: Rank = 0.rank

        # Rank on this processor
        fun rank: Rank is abstract

        # Where to store data for transfer between nodes
        #
        # Require: `buffer.length % 4 == 0`
        var buffer = new CIntArray(1024)

        # Run in verbose mode, display more text
        var verbose = 0

        init
        do
                # OpenMPI sends a SIGTERM to all nodes upon receiving a SIGTERM or SIGINT
                # on the first process.
                handle_signal(sigterm, true)
        end

        # Tag of a new task packet of size `tasks_per_packet`
        var task_tag: Tag = 0.tag

        # Tag to return a set of `Result` thought `buffer`
        var result_tag: Tag = 1.tag

        # Tag to notify `Worker` when to quit
        var quit_tag: Tag = 2.tag

        # Tag to request more work from the `Controller` by a `Worker`
        var need_work_tag: Tag = 4.tag

        # Tag to notify `Controller` that the sender `Worker` is done
        var done_tag: Tag = 5.tag

        # Number of tasks within each task assignation with `task_tag`
        var tasks_per_packet = 1

        # Run the main logic of this node
        fun run is abstract

        # Hash or name of the branch to test
        var branch_hash: String is noinit

        # Engines targeted by this execution
        var engines: Array[String] is noinit

        # All known engines, used to detect errors in `engines`
        var all_engines: Array[String] = ["nitg-s", "nitg-sg", "nitg-g", "nitg-e", "niti", "emscripten"]

        # Programs to test in this execution
        var test_programs: Array[String] is noinit

        # Root of the temporary directory
        var tmp_dir = "/dev/shm/"

        # `ccache` directory
        var ccache_dir = "/dev/shm/nit_ccache"

        # Read command line options
        fun read_cli_options
        do
                var opt_ctx = new OptionContext
                var opt_hash = new OptionString(
                        "Branch to test",
                        "--hash", "-h")
                opt_hash.mandatory = true
                var opt_engines = new OptionString(
                        "Engines to test, separated with commas ({all_engines.join(", ")} or all)",
                        "--engine", "-e")
                var opt_help = new OptionBool("Print this help message", "--help", "-h")
                var opt_verbose = new OptionCount(
                        "Be verbose, repeat to increase verbose level (max with -vvv)",
                        "--verbose", "-v")
                var opt_cleanup = new OptionBool(
                        "Clean up all nitester files (and do not run tests)",
                        "--cleanup", "-C")

                opt_ctx.add_option(opt_hash, opt_engines, opt_help, opt_verbose, opt_cleanup)
                opt_ctx.parse args

                # --help?
                if opt_help.value then opt_ctx.usage_error null

                # --verbose?
                verbose = opt_verbose.value

                # --cleanup?
                if opt_cleanup.value then
                        assert tmp_dir.file_exists
                        for file in tmp_dir.files do if file.has_prefix("nit") then
                                var full_path = tmp_dir / file
                                if full_path == ccache_dir then continue

                                assert full_path.file_exists

                                var stat = full_path.file_lstat
                                if stat.is_dir then
                                        full_path.rmdir
                                else
                                        full_path.file_delete
                                end
                                stat.free
                        end
                        mpi.finalize
                        exit 0
                end

                # any files?
                var rest = opt_ctx.rest
                if rest.is_empty then opt_ctx.usage_error "This tool needs at least one test_program.nit"
                test_programs = rest

                # hash
                branch_hash = opt_hash.value.as(not null)

                # gather and check engines
                var engines_str = opt_engines.value
                var engines
                if engines_str == null then
                        # default
                        engines = ["nitg-s"]
                else
                        engines = engines_str.split(',')

                        if engines.has("all") then
                                # all engines
                                engines = all_engines
                        end
                end

                # check validity of targetted engines
                var unknown_engines = new Array[String]
                for engine in engines do if not all_engines.has(engine) then unknown_engines.add engine

                if not unknown_engines.is_empty then
                        opt_ctx.usage_error "Unknown engines: {unknown_engines.join(", ")} (expected one or most of {all_engines.join(", ")})"
                end
                self.engines = engines
        end

        # All tasks to be performed
        var tasks = new Array[Task]

        # Gather and register all tasks
        fun create_tasks
        do
                # At this point we are in our local nit
                var skip_path = "tests/turing.skip"
                var skip
                if skip_path.file_exists then
                        var skip_file = new FileReader.open(skip_path)
                        skip = skip_file.read_lines
                        skip_file.close
                else
                        skip = new Array[String]
                end

                for engine in engines do for prog in test_programs do
                        # Is is blacklisted?
                        for s in skip do if not s.is_empty and prog.has(s) then
                                if verbose > 0 and rank == 0 then print "Skipping test '{prog}' because of '{s}' in turing.skip"
                                continue label
                        end

                        tasks.add new Task(engine, prog)
                end label
        end
end

# Single controller to dispatch tasks, gather results and produce stats
class Controller
        super Processor

        redef fun rank do return controller_rank

        # Id as `Int` of the next task to distribute
        var next_task_id = 0

        redef fun receive_signal(signal)
        do
                shutdown
                print_results

                mpi.finalize
                exit 0
        end

        redef fun run
        do
                read_cli_options
                create_tasks
                distribute_tasks
                print_results
        end

        # Cumulated results from workers
        var results = new ResultSet

        # Maintain communication with workers to distribute tasks and receiver results
        fun distribute_tasks
        do
                var at_work = new Array[Rank]

                # send initial tasks
                for r in [1..comm_world.size[ do
                        var sent = send_task_to(r.rank)
                        if sent then
                                at_work.add r.rank
                        else
                                mpi.send_empty(r.rank, quit_tag, comm_world)
                        end
                end

                var status = new Status
                # await results and send new tasks
                while not at_work.is_empty do
                        check_signals

                        # Double probe to avoid bug with some implementation of MPI
                        mpi.probe(new Rank.any, new Tag.any, comm_world, status)
                        mpi.probe(new Rank.any, new Tag.any, comm_world, status)

                        if status.tag == result_tag then
                                # Receive results fron a worker
                                var count = status.count(new DataType.int)
                                mpi.recv_into(buffer, 0, count, status.source, status.tag, comm_world)

                                # Parse results from C array to `Result` instances
                                #
                                # Each result is on 4 ints: task id, arg, alt and result.
                                #
                                # See the comments where the data is produced in `Worker::work_on_tasks` for more informationé
                                assert count % 4 == 0
                                for t in (count/4).times do
                                        var tt = t*4

                                        var task_id = buffer[tt]
                                        var arg = buffer[tt+1]
                                        var alt = buffer[tt+2]
                                        var res = buffer[tt+3]

                                        var result = new Result(tasks[task_id], arg, alt)

                                        if res == 1 then result.ok = true
                                        if res == 2 then result.ok_empty = true
                                        if res == 3 then result.no_sav = true
                                        if res == 4 then result.fixme = true
                                        if res == 5 then result.fail = true
                                        if res == 6 then result.soso = true
                                        if res == 7 then result.skip = true
                                        if res == 8 then result.todo = true
                                        if res == 9 then result.skip_exec = true
                                        if res == 0 then result.unknown = true

                                        results.add result

                                        if verbose > 0 and results.length % 25 == 0 then print_short_results
                                end

                        else if status.tag == need_work_tag then
                                # A worker needs more work
                                mpi.recv_empty(status.source, status.tag, comm_world)
                                var sent = send_task_to(status.source)
                                if not sent then
                                        # no more work, quit
                                        mpi.send_empty(status.source, quit_tag, comm_world)
                                end
                        else if status.tag == done_tag then
                                # A worker is done and will quit
                                mpi.recv_empty(status.source, status.tag, comm_world)
                                at_work.remove(status.source)

                                if verbose > 0 then print "Worker {status.source} is done ({at_work.length} still at work)"
                        else
                                print "Unexpected tag {status.tag}"
                                shutdown
                                break
                        end
                end
                status.free
        end

        # Send a packet of tasks to worker at `rank`
        fun send_task_to(rank: Rank): Bool
        do
                if next_task_id >= tasks.length then return false

                buffer[0] = next_task_id
                next_task_id += tasks_per_packet

                mpi.send_from(buffer, 0, 1, rank, task_tag, comm_world)

                if verbose > 1 then print "sent tasks [{buffer[0]}..{next_task_id}[ to worker {rank}"
                return true
        end

        # Display the accumulated results received from workers
        fun print_results
        do
                print "# results #"
                print "* {results.length} total"
                print "* {results.oks.length + results.ok_empties.length} oks & 0ks"
                print "* {results.fails.length} fails"
                print "* {results.no_savs.length} no savs"
                print "* {results.fixmes.length} fixmes"
                print "* {results.sosos.length} sosos"
                print "* {results.skips.length} skips"
                print "* {results.todos.length} todos"
                print "* {results.skip_execs.length} skip execs"
                print "* {results.unknowns.length} unknowns (bug in tests.sh or nitester)"
        end

        fun print_short_results do print "oks & fails / total: {results.oks.length + results.ok_empties.length} " +
                "& {results.fails.length} / {results.length}"

        # Shutdown anormaly the running tests
        fun shutdown
        do
                print "Shutting down"
                mpi.send_empty(new Rank.any, quit_tag, comm_world)
        end
end

# A worker node which actually execute the tests
class Worker
        super Processor

        # The `Rank` of `self`
        redef var rank: Rank

        # Compilation directory
        var comp_dir = "/dev/shm/nit_compile{rank}" is lazy

        # Directory to store the xml files produced for Jenkins
        var xml_dir = "~/jenkins_xml/"

        # Output file of the `tests.sh` script
        var tests_sh_out = "/dev/shm/nit_local_out{rank}" is lazy

        # Source Nit repository, must be already updated and `make` before execution
        var local_nit = "/dev/shm/nit{rank}" is lazy

        # Remote Nit repository (actually the local source)
        var remote_nit = "~/nit/"

        # Compiled `Regex` to detect the argument of an execution
        var re_arg: Regex = "arg [0-9]+".to_re

        # Compiled `Regex` to detect the alternative of an execution
        var re_alt: Regex = "_alt[0-9]+".to_re

        redef fun run
        do
                read_cli_options
                setup
                create_tasks
                work_on_tasks
                cleanup
        end

        # Setup the testing environment
        #
        # Clone the nit repository.
        fun setup
        do
                if verbose > 0 then sys.system "hostname"

                if local_nit.file_exists then local_nit.rmdir

                exec_and_check "git clone {remote_nit} {local_nit}"
                local_nit.chdir
                exec_and_check "git config remote.origin.fetch +refs/remotes/origin/pr/*:refs/remotes/origin/pr/*"
                exec_and_check "git fetch origin --quiet"
                exec_and_check "git checkout {branch_hash}"
                exec_and_check "cp {remote_nit}/bin/*  bin/"
                exec_and_check "src/git-gen-version.sh"
        end

        private fun exec_and_check(cmd: String)
        do
                if verbose > 0 then
                        print "+ {cmd}"
                        var res = sys.system(cmd)
                        assert res == 0 else print "Command '{cmd}' failed."
                end
        end

        # Clean up the testing environment
        #
        # Delete all temporary files, except `ccache_dir`.
        fun cleanup
        do
                if comp_dir.file_exists then comp_dir.rmdir
                if tests_sh_out.file_exists then tests_sh_out.file_delete
                if local_nit.file_exists then local_nit.file_delete
        end

        # Single C `int` to hold the next task id received from the `Controller`
        var task_buffer = new CIntArray(1)

        # Manage communication with the `Controller` and execute dispatched `Task`s
        fun work_on_tasks
        do
                var status = new Status
                loop
                        check_signals

                        # We double probe to prevent bug where a single probes does not receive the
                        # real next read.
                        mpi.probe(controller_rank, new Tag.any, comm_world, status)
                        mpi.probe(controller_rank, new Tag.any, comm_world, status)

                        if status.tag == task_tag then
                                # Receive tasks to execute
                                mpi.recv_into(task_buffer, 0, 1, status.source, status.tag, comm_world)
                                var first_id = task_buffer[0]
                                for task_id in [first_id .. first_id + tasks_per_packet[ do

                                        # If id is over all known tasks, stop right here
                                        if task_id >= tasks.length then break
                                        var task = tasks[task_id]

                                        "tests".chdir

                                        # Command line to execute test
                                        var cmd = "XMLDIR={xml_dir} " +
                                                "CCACHE_DIR={ccache_dir} CCACHE_TEMPDIR={ccache_dir} CCACHE_BASEDIR={comp_dir} " +
                                                "./tests.sh --node --engine {task.engine} {task.test_program} > {tests_sh_out}"

                                        # Execute test
                                        sys.system cmd

                                        # Test results were written to file, read them
                                        var fstream = new FileReader.open(tests_sh_out)
                                        var content = fstream.read_all
                                        fstream.close

                                        # Parse result and prepare them for sending
                                        #
                                        # The structure is composed of 4 ints for each result.
                                        # 1. task id
                                        # 2. arg number
                                        # 3. alt number
                                        # 4. test result as int
                                        var c = results_count
                                        for line in content.split('\n') do if not line.is_empty then
                                                var cc = c*4

                                                buffer[cc] = task_id

                                                var arg_match = line.search(re_arg)
                                                var arg = 0
                                                if arg_match != null then arg = arg_match.to_s.substring_from(4).to_i
                                                buffer[cc+1] = arg

                                                var alt_match = line.search(re_alt)
                                                var alt = 0
                                                if alt_match != null then alt = alt_match.to_s.substring_from(4).to_i
                                                buffer[cc+2] = alt

                                                var res = null
                                                if line.has("[ok]") then res = 1
                                                if line.has("[0k]") then res = 2
                                                if line.has("[=== no sav ===]") then res = 3
                                                if line.has("[fixme]") then res = 4
                                                if line.has("[======= fail") then res = 5
                                                if line.has("[======= soso") then res = 6
                                                if line.has("[skip]") then res = 7
                                                if line.has("[todo]") then res = 8
                                                if line.has("[skip exec]") then res = 9

                                                if res == null then
                                                        res = 0
                                                        if verbose > 1 then print "Unknown result: '{line}'"
                                                end
                                                buffer[cc+3] = res

                                                c += 1

                                                if verbose > 2 then print "tests.sh output line: {line}"

                                                # If result buffer is full, send to `Controller`
                                                if c*4 == buffer.length then
                                                        send_results
                                                        c = 0
                                                end
                                        end

                                        if verbose > 1 then print "Done testing: {task}"

                                        self.results_count = c
                                end

                                mpi.send_empty(controller_rank, need_work_tag, comm_world)
                        else if status.tag == quit_tag then
                                # Notification from the `Controller` to quit
                                mpi.recv_empty(status.source, status.tag, comm_world)

                                # Send remaining results
                                send_results

                                # Notify `Controller` that `self` is done and will quit
                                mpi.send_empty(controller_rank, done_tag, comm_world)
                                break
                        else
                                print "Unexpected tag {status.tag}"
                                break
                        end
                end
                status.free
        end

        # Total results listed in `buffer` and ready to send
        var results_count = 0

        # Send all results in `buffer` to the `Controller`
        fun send_results
        do
                if results_count > 0 then
                        if verbose > 2 then print "Sending {results_count} results"
                        mpi.send_from(buffer, 0, results_count*4, controller_rank, result_tag, comm_world)
                        results_count = 0
                end
        end

        redef fun receive_signal(signal)
        do
                cleanup
                mpi.finalize
                exit 0
        end
end

# A single test task, on a `test_program` with an `engine`
#
# Note that a task may involve more than one program to test considering the
# alts and args for the `test_program`.
class Task
        # Engine to test executing `test_program`
        var engine: String

        # Program to execute with `engine`
        var test_program: String

        redef fun to_s do return "{engine} {test_program}"
end

# Result of a `Task`
#
# There may be more than one result per `Task`.
class Result
        # `Task` associated to `self`
        var task: Task

        # Argument index of the execution resulting in `self`
        var arg: Int

        # Alternative index of the execution resulting in `self`
        var alt: Int

        # Is `self` result an _ok_?
        var ok = false

        # Is `self` result an _0k_?
        var ok_empty = false

        # Is `self` result a _no sav_?
        var no_sav = false

        # Is `self` result a _fixme_?
        var fixme = false

        # Is `self` result a _fail_?
        var fail = false

        # Is `self` result a _soso_?
        var soso = false

        # Has `self` been skipped?
        var skip = false

        # Is `self` TODO?
        var todo = false

        # Has the execution of `self` been skipped?
        var skip_exec = false

        # Is `self` an unknown result, probably an error
        var unknown = false

        redef fun to_s
        do
                var err = "Unknown"
                if no_sav then err = "no sav"
                if ok then err = "ok"
                if ok_empty then err = "0k"
                if fixme then err = "fixme"
                if fail then err = "fail"
                if soso then err = "soso"
                if skip then err = "skip"
                if todo then err = "todo"
                if skip_exec then err = "skip_exec"

                return "{task} arg{arg} alt{alt} => {err}"
        end
end

# A global and sorted collection of `Result`
class ResultSet
        super HashSet[Result]

        var no_savs = new HashSet[Result]
        var oks = new HashSet[Result]
        var ok_empties = new HashSet[Result]
        var fixmes = new HashSet[Result]
        var fails = new HashSet[Result]
        var sosos = new HashSet[Result]
        var skips = new HashSet[Result]
        var todos = new HashSet[Result]
        var skip_execs = new HashSet[Result]
        var unknowns = new HashSet[Result]

        # TODO remove
        var per_engines = new HashMap[String, Result]

        redef fun add(result)
        do
                if result.no_sav then no_savs.add result
                if result.ok then oks.add result
                if result.ok_empty then ok_empties.add result
                if result.fixme then fixmes.add result
                if result.fail then fails.add result
                if result.soso then sosos.add result
                if result.skip then skips.add result
                if result.todo then todos.add result
                if result.skip_exec then skip_execs.add result
                if result.unknown then unknowns.add result

                super
        end

        redef fun remove(r) do abort

        redef fun clear do abort
end

redef class OptionContext

        # Print usage with a possible error `message`
        private fun usage_error(message: nullable String)
        do
                var ret = 0
                if message != null then
                        print "Error: {message}"
                        ret = 1
                end

                if comm_world.rank == 0 then
                        print "Usage: mpirun nitester [Options] test_program.nit [other_test.nit [...]]"
                        usage
                end

                mpi.finalize
                exit ret
        end
end

# On `Worker` nodes, prefix all prints with `rank/comm_world.size`
redef fun print(msg: Object)
do
        if comm_world.rank != 0.rank then
                super "{comm_world.rank}/{comm_world.size}: {msg}"
        else super msg
end

# Running MPI instance
fun mpi: MPI do return once new MPI

# Launch mpi
mpi

# Local rank
var rank = comm_world.rank

var processor: Processor
if rank == 0.rank then
        # If rank == 0, this is the `Controller`
        processor = new Controller
else
        # This is a worker
        processor = new Worker(rank)
end
processor.run

mpi.finalize