Tests for EINTR-based signal handling
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15b9d006a4
commit
c2b2da2234
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(* TEST
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* hassysthreads
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include systhreads
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** not-windows
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*** bytecode
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*** native
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*)
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let signals_requested = Atomic.make 0
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let signal_delay = 0.1
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let _ = Thread.create (fun () ->
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let signals_sent = ref 0 in
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ignore (Thread.sigmask Unix.SIG_BLOCK [Sys.sigint]);
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while true do
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if Atomic.get signals_requested > !signals_sent then begin
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Thread.delay signal_delay;
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Unix.kill (Unix.getpid ()) Sys.sigint;
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incr signals_sent
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end else begin
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Thread.yield ()
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end
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done) ()
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let request_signal () = Atomic.incr signals_requested
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let () =
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let (rd, wr) = Unix.pipe () in
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Sys.catch_break true;
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request_signal ();
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begin match Unix.read rd (Bytes.make 1 'a') 0 1 with
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| _ -> assert false
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| exception Sys.Break -> print_endline "break: ok" end;
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Sys.catch_break false;
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Unix.close rd;
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Unix.close wr
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let () =
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let (rd, wr) = Unix.pipe () in
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Sys.set_signal Sys.sigint (Signal_handle (fun _ -> Gc.full_major ()));
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request_signal ();
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begin match Unix.read rd (Bytes.make 1 'a') 0 1 with
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| _ -> assert false
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| exception Unix.Unix_error(Unix.EINTR, "read", _) ->
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print_endline "eintr: ok" end;
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Sys.set_signal Sys.sigint Signal_default;
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Unix.close rd;
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Unix.close wr
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(* Doing I/O on stdout would be more realistic, but seeking has the
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same locking & scheduling effects, without actually producing any
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output *)
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let poke_stdout () =
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match out_channel_length stdout with
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| _ -> ()
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| exception Sys_error _ -> ()
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let () =
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let r = Atomic.make true in
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Sys.set_signal Sys.sigint (Signal_handle (fun _ ->
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poke_stdout (); Atomic.set r false));
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request_signal ();
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while Atomic.get r do
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poke_stdout ()
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done;
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Sys.set_signal Sys.sigint Signal_default;
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print_endline "chan: ok"
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let () =
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let mklist () = List.init 1000 (fun i -> (i, i)) in
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let before = Sys.opaque_identity (ref (mklist ())) in
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let during = Atomic.make (Sys.opaque_identity (mklist ())) in
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let siglist = ref [] in
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Sys.set_signal Sys.sigint (Signal_handle (fun _ ->
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Gc.full_major (); poke_stdout (); Gc.compact ();
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siglist := mklist ();
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raise Sys.Break));
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request_signal ();
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begin match
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while true do
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poke_stdout ();
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Atomic.set during (mklist ())
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done
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with
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| () -> assert false
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| exception Sys.Break -> () end;
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let expected = Sys.opaque_identity (mklist ()) in
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assert (!before = expected);
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assert (Atomic.get during = expected);
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assert (!siglist = expected);
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print_endline "gc: ok"
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@ -0,0 +1,4 @@
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break: ok
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eintr: ok
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chan: ok
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gc: ok
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