author | haftmann |
Mon, 08 Oct 2007 22:03:25 +0200 | |
changeset 24915 | fc90277c0dd7 |
parent 24584 | 01e83ffa6c54 |
child 25413 | df27d19c35dd |
permissions | -rw-r--r-- |
24584 | 1 |
(* Title: HOL/Tools/watcher.ML |
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ID: $Id$ |
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Author: Claire Quigley |
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Copyright 2004 University of Cambridge |
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*) |
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(* The watcher process starts a resolution process when it receives a *) |
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(* message from Isabelle *) |
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(* Signals Isabelle, puts output of child into pipe to Isabelle, *) |
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(* and removes dead processes. Also possible to kill all the resolution *) |
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(* processes currently running. *) |
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signature WATCHER = |
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sig |
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(* Send request to Watcher for multiple spasses to be called for filenames in arg *) |
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(* callResProvers (outstreamtoWatcher, prover name,prover-command, (settings,file) list *) |
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val callResProvers : TextIO.outstream * (string*string*string*string) list -> unit |
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(* Send message to watcher to kill resolution provers *) |
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val callSlayer : TextIO.outstream -> unit |
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(* Start a watcher and set up signal handlers*) |
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val createWatcher : |
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Proof.context * thm * string Vector.vector list -> |
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TextIO.instream * TextIO.outstream * Posix.Process.pid |
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val killWatcher : Posix.Process.pid -> unit |
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val killChild : ('a, 'b) Unix.proc -> OS.Process.status |
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val command_sep : char |
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val setting_sep : char |
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val reapAll : unit -> unit |
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end |
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structure Watcher: WATCHER = |
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struct |
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(*Field separators, used to pack items onto a text line*) |
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val command_sep = #"\t" |
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and setting_sep = #"%"; |
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val goals_being_watched = ref 0; |
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val trace_path = Path.basic "watcher_trace"; |
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fun trace s = if !Output.debugging then File.append (File.tmp_path trace_path) s |
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else (); |
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(*Representation of a watcher process*) |
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type proc = {pid : Posix.Process.pid, |
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instr : TextIO.instream, |
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outstr : TextIO.outstream}; |
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(*Representation of a child (ATP) process*) |
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type cmdproc = { |
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prover: string, (* Name of the resolution prover used, e.g. "spass"*) |
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file: string, (* The file containing the goal for the ATP to prove *) |
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proc_handle : (TextIO.instream,TextIO.outstream) Unix.proc, |
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instr : TextIO.instream, (*Output of the child process *) |
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outstr : TextIO.outstream}; (*Input to the child process *) |
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fun fdReader (name : string, fd : Posix.IO.file_desc) = |
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Posix.IO.mkTextReader {initBlkMode = true,name = name,fd = fd }; |
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fun fdWriter (name, fd) = |
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Posix.IO.mkTextWriter { |
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appendMode = false, |
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initBlkMode = true, |
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name = name, |
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chunkSize=4096, |
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fd = fd}; |
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fun openOutFD (name, fd) = |
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TextIO.mkOutstream ( |
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TextIO.StreamIO.mkOutstream ( |
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fdWriter (name, fd), IO.BLOCK_BUF)); |
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fun openInFD (name, fd) = |
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TextIO.mkInstream ( |
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TextIO.StreamIO.mkInstream ( |
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fdReader (name, fd), "")); |
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(* Send request to Watcher for a vampire to be called for filename in arg*) |
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fun callResProver (toWatcherStr, arg) = |
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(TextIO.output (toWatcherStr, arg^"\n"); |
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TextIO.flushOut toWatcherStr) |
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(* Send request to Watcher for multiple provers to be called*) |
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fun callResProvers (toWatcherStr, []) = |
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(TextIO.output (toWatcherStr, "End of calls\n"); TextIO.flushOut toWatcherStr) |
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| callResProvers (toWatcherStr, |
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(prover,proverCmd,settings,probfile) :: args) = |
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(trace (space_implode ", " (["\ncallResProvers:", prover, proverCmd, probfile])); |
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(*Uses a special character to separate items sent to watcher*) |
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TextIO.output (toWatcherStr, |
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space_implode (str command_sep) [prover, proverCmd, settings, probfile, "\n"]); |
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inc goals_being_watched; |
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TextIO.flushOut toWatcherStr; |
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callResProvers (toWatcherStr,args)) |
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(*Send message to watcher to kill currently running vampires. NOT USED and possibly |
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buggy. Note that killWatcher kills the entire process group anyway.*) |
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fun callSlayer toWatcherStr = (TextIO.output (toWatcherStr, "Kill children\n"); |
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TextIO.flushOut toWatcherStr) |
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(* Get commands from Isabelle*) |
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fun getCmds (toParentStr, fromParentStr, cmdList) = |
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let val thisLine = the_default "" (TextIO.inputLine fromParentStr) |
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in |
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trace("\nGot command from parent: " ^ thisLine); |
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if thisLine = "End of calls\n" orelse thisLine = "" then cmdList |
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else if thisLine = "Kill children\n" |
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then (TextIO.output (toParentStr,thisLine); |
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TextIO.flushOut toParentStr; |
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[("","Kill children",[],"")]) |
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else |
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let val [prover,proverCmd,settingstr,probfile,_] = |
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String.tokens (fn c => c = command_sep) thisLine |
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val settings = String.tokens (fn c => c = setting_sep) settingstr |
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in |
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trace ("\nprover: " ^ prover ^ " prover path: " ^ proverCmd ^ |
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"\n problem file: " ^ probfile); |
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getCmds (toParentStr, fromParentStr, |
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(prover, proverCmd, settings, probfile)::cmdList) |
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end |
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handle Bind => |
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(trace "\ngetCmds: command parsing failed!"; |
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getCmds (toParentStr, fromParentStr, cmdList)) |
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end |
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(*Get Io-descriptor for polling of an input stream*) |
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fun getInIoDesc someInstr = |
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let val (rd, buf) = TextIO.StreamIO.getReader(TextIO.getInstream someInstr) |
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val _ = TextIO.output (TextIO.stdOut, buf) |
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val ioDesc = |
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case rd |
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of TextPrimIO.RD{ioDesc = SOME iod, ...} => SOME iod |
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| _ => NONE |
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in (* since getting the reader will have terminated the stream, we need |
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* to build a new stream. *) |
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TextIO.setInstream(someInstr, TextIO.StreamIO.mkInstream(rd, buf)); |
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ioDesc |
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end |
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fun pollChild fromStr = |
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case getInIoDesc fromStr of |
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SOME iod => |
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(case OS.IO.pollDesc iod of |
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SOME pd => |
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let val pd' = OS.IO.pollIn pd in |
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case OS.IO.poll ([pd'], SOME (Time.fromSeconds 2)) of |
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[] => false |
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| pd''::_ => OS.IO.isIn pd'' |
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end |
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| NONE => false) |
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| NONE => false |
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(*************************************) |
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(* Set up a Watcher Process *) |
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(*************************************) |
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fun killChild proc = (Unix.kill(proc, Posix.Signal.kill); Unix.reap proc); |
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val killChildren = List.app (ignore o killChild o #proc_handle) : cmdproc list -> unit; |
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fun killWatcher (toParentStr, procList) = |
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(trace "\nWatcher timeout: Killing proof processes"; |
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TextIO.output(toParentStr, "Timeout: Killing proof processes!\n"); |
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TextIO.flushOut toParentStr; |
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killChildren procList; |
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Posix.Process.exit 0w0); |
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(* take an instream and poll its underlying reader for input *) |
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fun pollParentInput (fromParentIOD, fromParentStr, toParentStr) = |
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case OS.IO.pollDesc fromParentIOD of |
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SOME pd => |
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(case OS.IO.poll ([OS.IO.pollIn pd], SOME (Time.fromSeconds 2)) of |
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[] => NONE |
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| pd''::_ => if OS.IO.isIn pd'' |
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then SOME (getCmds (toParentStr, fromParentStr, [])) |
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else NONE) |
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| NONE => NONE; |
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(*get the number of the subgoal from the filename: the last digit string*) |
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fun number_from_filename s = |
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let val numbers = "xxx" :: String.tokens (not o Char.isDigit) s |
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in valOf (Int.fromString (List.last numbers)) end |
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handle Option => (trace ("\nWatcher could not read subgoal nunber! " ^ s); |
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error ("Watcher could not read subgoal nunber! " ^ s)); |
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(*Call ATP. Settings should be a list of strings ["-t 300", "-m 100000"], |
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which we convert below to ["-t", "300", "-m", "100000"] using String.tokens. |
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Otherwise, the SML/NJ version of Unix.execute will escape the spaces, and |
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Vampire will reject the switches.*) |
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fun execCmds [] procList = procList |
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| execCmds ((prover,proverCmd,settings,file)::cmds) procList = |
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let val _ = trace ("\nAbout to execute command: " ^ proverCmd ^ " " ^ file) |
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val settings' = List.concat (map (String.tokens Char.isSpace) settings) |
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val childhandle:(TextIO.instream,TextIO.outstream) Unix.proc = |
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Unix.execute(proverCmd, settings' @ [file]) |
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val (instr, outstr) = Unix.streamsOf childhandle |
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val newProcList = {prover=prover, file=file, proc_handle=childhandle, |
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instr=instr, outstr=outstr} :: procList |
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val _ = trace ("\nFinished at " ^ |
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Date.toString(Date.fromTimeLocal(Time.now()))) |
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in execCmds cmds newProcList end |
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fun checkChildren (ctxt, th, thm_names_list) toParentStr children = |
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let fun check [] = [] (* no children to check *) |
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| check (child::children) = |
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let val {prover, file, proc_handle, instr=childIn, ...} : cmdproc = child |
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val _ = trace ("\nprobfile = " ^ file) |
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parents:
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val i = number_from_filename file (*subgoal number*) |
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val thm_names = List.nth(thm_names_list, i-1); |
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val ppid = Posix.ProcEnv.getppid() |
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in |
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if pollChild childIn |
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then (* check here for prover label on child*) |
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let val _ = trace ("\nInput available from child: " ^ file) |
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val childDone = (case prover of |
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"vampire" => ResReconstruct.checkVampProofFound |
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(childIn, toParentStr, ppid, file, ctxt, th, i, thm_names) |
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| "E" => ResReconstruct.checkEProofFound |
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(childIn, toParentStr, ppid, file, ctxt, th, i, thm_names) |
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| "spass" => ResReconstruct.checkSpassProofFound |
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(childIn, toParentStr, ppid, file, ctxt, th, i, thm_names) |
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| _ => (trace ("\nBad prover! " ^ prover); true) ) |
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in |
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if childDone (*ATP has reported back (with success OR failure)*) |
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then (Unix.reap proc_handle; |
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if !Output.debugging then () else OS.FileSys.remove file; |
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check children) |
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else child :: check children |
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end |
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else (trace "\nNo child output"; child :: check children) |
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end |
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in |
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trace ("\nIn checkChildren, length of queue: " ^ Int.toString(length children)); |
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check children |
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end; |
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fun setupWatcher (ctxt, th, thm_names_list) = |
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let |
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val checkc = checkChildren (ctxt, th, thm_names_list) |
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val p1 = Posix.IO.pipe() (*pipes for communication between parent and watcher*) |
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val p2 = Posix.IO.pipe() |
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(****** fork a watcher process and get it set up and going ******) |
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fun startWatcher procList = |
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case Posix.Process.fork() of |
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SOME pid => pid (* parent - i.e. main Isabelle process *) |
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| NONE => |
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let (* child - i.e. watcher *) |
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val oldchildin = #infd p1 |
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val fromParent = Posix.FileSys.wordToFD 0w0 |
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val oldchildout = #outfd p2 |
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val toParent = Posix.FileSys.wordToFD 0w1 |
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val fromParentIOD = Posix.FileSys.fdToIOD fromParent |
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val fromParentStr = openInFD ("_exec_in_parent", fromParent) |
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val toParentStr = openOutFD ("_exec_out_parent", toParent) |
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val pid = Posix.ProcEnv.getpid() |
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val () = Posix.ProcEnv.setpgid {pid = SOME pid, pgid = SOME pid} |
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(*set process group id: allows killing all children*) |
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val () = trace "\nsubgoals forked to startWatcher" |
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val limit = ref 200; (*don't let watcher run forever*) |
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(*Watcher Loop : Check running ATP processes for output*) |
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fun keepWatching procList = |
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(trace ("\npollParentInput. Limit = " ^ Int.toString (!limit) ^ |
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" length(procList) = " ^ Int.toString(length procList)); |
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OS.Process.sleep (Time.fromMilliseconds 100); limit := !limit - 1; |
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if !limit < 0 then killWatcher (toParentStr, procList) |
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else |
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case pollParentInput(fromParentIOD, fromParentStr, toParentStr) of |
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SOME [(_,"Kill children",_,_)] => |
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(trace "\nReceived Kill command"; |
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killChildren procList; keepWatching []) |
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| SOME cmds => (* deal with commands from Isabelle process *) |
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let val _ = trace("\nCommands from parent: " ^ |
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Int.toString(length cmds)) |
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val newProcList' = checkc toParentStr (execCmds cmds procList) |
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in trace "\nCommands executed"; keepWatching newProcList' end |
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| NONE => (* No new input from Isabelle *) |
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(trace "\nNothing from parent..."; |
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keepWatching(checkc toParentStr procList))) |
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handle exn => (*FIXME: exn handler is too general!*) |
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(trace ("\nkeepWatching exception handler: " ^ Toplevel.exn_message exn); |
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keepWatching procList); |
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in |
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(*** Sort out pipes ********) |
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Posix.IO.close (#outfd p1); Posix.IO.close (#infd p2); |
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Posix.IO.dup2{old = oldchildin, new = fromParent}; |
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Posix.IO.close oldchildin; |
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Posix.IO.dup2{old = oldchildout, new = toParent}; |
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Posix.IO.close oldchildout; |
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keepWatching (procList) |
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end; |
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val _ = TextIO.flushOut TextIO.stdOut |
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val pid = startWatcher [] |
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(* communication streams to watcher*) |
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val instr = openInFD ("_exec_in", #infd p2) |
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val outstr = openOutFD ("_exec_out", #outfd p1) |
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in |
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(* close the child-side fds*) |
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Posix.IO.close (#outfd p2); Posix.IO.close (#infd p1); |
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(* set the fds close on exec *) |
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Posix.IO.setfd (#infd p2, Posix.IO.FD.flags [Posix.IO.FD.cloexec]); |
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Posix.IO.setfd (#outfd p1, Posix.IO.FD.flags [Posix.IO.FD.cloexec]); |
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{pid = pid, instr = instr, outstr = outstr} |
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end; |
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320 |
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321 |
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322 |
(**********************************************************) |
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323 |
(* Start a watcher and set up signal handlers *) |
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(**********************************************************) |
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325 |
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326 |
(*Signal handler to tidy away zombie processes*) |
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fun reapAll() = |
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(case Posix.Process.waitpid_nh(Posix.Process.W_ANY_CHILD, []) of |
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SOME _ => reapAll() | NONE => ()) |
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handle OS.SysErr _ => () |
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332 |
(*FIXME: does the main process need something like this? |
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IsaSignal.signal (IsaSignal.chld, IsaSignal.SIG_HANDLE reap)??*) |
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334 |
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335 |
fun killWatcher pid = |
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(goals_being_watched := 0; |
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Posix.Process.kill(Posix.Process.K_GROUP pid, Posix.Signal.kill); |
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reapAll()); |
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339 |
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340 |
fun reapWatcher(pid, instr, outstr) = ignore |
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(TextIO.closeIn instr; TextIO.closeOut outstr; |
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Posix.Process.waitpid(Posix.Process.W_CHILD pid, [])) |
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handle OS.SysErr _ => () |
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344 |
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345 |
fun string_of_subgoal th i = |
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string_of_cterm (List.nth(cprems_of th, i-1)) |
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347 |
handle Subscript => "Subgoal number out of range!" |
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348 |
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349 |
fun prems_string_of th = space_implode "\n" (map string_of_cterm (cprems_of th)) |
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350 |
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351 |
fun read_proof probfile = |
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352 |
let val p = ResReconstruct.txt_path probfile |
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353 |
val _ = trace("\nReading proof from file " ^ Path.implode p) |
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val msg = File.read p |
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val _ = trace("\nProof:\n" ^ msg) |
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in if !Output.debugging then () else File.rm p; msg end; |
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||
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parents:
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(*Non-successful outcomes*) |
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359 |
fun report i s = priority ("Subgoal " ^ Int.toString i ^ ": " ^ s); |
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parents:
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|
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parents:
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(*Successful outcome: auto-insertion of commands into the PG buffer. Thanks to D Aspinall!!*) |
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parents:
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362 |
fun report_success i s sgtx = |
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363 |
let val sgline = "Subgoal " ^ string_of_int i ^ ":" |
ca97c6f3d9cd
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paulson
parents:
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364 |
val outlines = |
ca97c6f3d9cd
Returning both a "one-line" proof and a structured proof
paulson
parents:
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365 |
case split_lines s of |
ca97c6f3d9cd
Returning both a "one-line" proof and a structured proof
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366 |
[] => ["Received bad string: " ^ s] |
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| line::lines => [" Try this command:", (*Markup.enclose Markup.sendback*) line, ""] |
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@ lines |
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in priority (cat_lines (sgline::sgtx::outlines)) end; |
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|
23519 | 371 |
fun createWatcher (ctxt, th, thm_names_list) = |
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let val {pid=childpid, instr=childin, outstr=childout} = setupWatcher (ctxt,th,thm_names_list) |
|
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fun decr_watched() = |
|
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(goals_being_watched := !goals_being_watched - 1; |
|
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if !goals_being_watched = 0 |
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then |
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(Output.debug (fn () => ("\nReaping a watcher, childpid = " ^ string_of_pid childpid)); |
|
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killWatcher childpid (*???; reapWatcher (childpid, childin, childout)*) ) |
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else ()) |
|
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fun proofHandler _ = |
|
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let val _ = trace("\nIn signal handler for pid " ^ string_of_pid childpid) |
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val outcome = valOf (TextIO.inputLine childin) |
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handle Option => error "watcher: \"outcome\" line is missing" |
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val probfile = valOf (TextIO.inputLine childin) |
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handle Option => error "watcher: \"probfile\" line is missing" |
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val i = number_from_filename probfile |
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val text = "\n" ^ string_of_subgoal th i |
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in |
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Output.debug (fn () => ("In signal handler. outcome = \"" ^ outcome ^ |
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"\"\nprobfile = " ^ probfile ^ |
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"\nGoals being watched: "^ Int.toString (!goals_being_watched))); |
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if String.isPrefix "Invalid" outcome |
|
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then (report i ("Subgoal is not provable:" ^ text); |
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decr_watched()) |
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else if String.isPrefix "Failure" outcome |
|
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then (report i ("Proof attempt failed:" ^ text); |
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decr_watched()) |
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(* print out a list of rules used from clasimpset*) |
|
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else if String.isPrefix "Success" outcome |
|
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then (report_success i (read_proof probfile) text; |
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decr_watched()) |
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(* if proof translation failed *) |
|
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else if String.isPrefix "Translation failed" outcome |
|
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then (report i (outcome ^ text); |
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decr_watched()) |
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else (report i "System error in proof handler"; |
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decr_watched()) |
408 |
end |
|
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in Output.debug (fn () => ("subgoals forked to createWatcher: "^ prems_string_of th)); |
|
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IsaSignal.signal (IsaSignal.usr2, IsaSignal.SIG_HANDLE proofHandler); |
|
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(childin, childout, childpid) |
|
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end |
|
413 |
||
414 |
end (* structure Watcher *) |