51 lines
1.7 KiB
OCaml
51 lines
1.7 KiB
OCaml
(***********************************************************************)
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(* *)
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(* OCaml *)
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(* *)
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(* Xavier Leroy, projet Gallium, INRIA Rocquencourt *)
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(* *)
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(* Copyright 2008 Institut National de Recherche en Informatique et *)
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(* en Automatique. All rights reserved. This file is distributed *)
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(* under the terms of the Q Public License version 1.0. *)
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(* *)
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(***********************************************************************)
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(* A test for stack backtraces *)
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external get_backtrace : unit -> Printexc.backtrace_slot array option
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= "caml_get_exception_backtrace"
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exception Error of string
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let rec f msg n =
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if n = 0 then raise(Error msg) else 1 + f msg (n-1)
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let g msg =
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try
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f msg 5
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with Error "a" -> print_string "a"; print_newline(); 0
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| Error "b" as exn -> print_string "b"; print_newline(); raise exn
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| Error "c" -> raise (Error "c")
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let run args =
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try
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ignore (g args.(0)); print_string "No exception\n"
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with exn ->
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Printf.printf "Uncaught exception %s\n" (Printexc.to_string exn);
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get_backtrace () |> function
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| None -> ()
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| Some trace ->
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Array.iteri
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(fun i slot -> match Printexc.Slot.format i slot with
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| None -> ()
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| Some line -> print_endline line)
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trace
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let _ =
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Printexc.record_backtrace true;
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run [| "a" |];
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run [| "b" |];
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run [| "c" |];
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run [| "d" |];
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run [| |]
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