blob: 7ec5152d0c94abb4edd922a6564a06e511576e61 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
|
(***********************************************************************)
(* *)
(* OCaml *)
(* *)
(* Xavier Leroy, projet Gallium, INRIA Rocquencourt *)
(* *)
(* Copyright 2008 Institut National de Recherche en Informatique et *)
(* en Automatique. All rights reserved. This file is distributed *)
(* under the terms of the Q Public License version 1.0. *)
(* *)
(***********************************************************************)
(* A test for stack backtraces *)
external get_backtrace : unit -> Printexc.backtrace_slot array option
= "caml_get_exception_backtrace"
exception Error of string
let rec f msg n =
if n = 0 then raise(Error msg) else 1 + f msg (n-1)
let g msg =
try
f msg 5
with Error "a" -> print_string "a"; print_newline(); 0
| Error "b" as exn -> print_string "b"; print_newline(); raise exn
| Error "c" -> raise (Error "c")
let run args =
try
ignore (g args.(0)); print_string "No exception\n"
with exn ->
Printf.printf "Uncaught exception %s\n" (Printexc.to_string exn);
get_backtrace () |> function
| None -> ()
| Some trace ->
Array.iteri
(fun i slot -> match Printexc.Slot.format i slot with
| None -> ()
| Some line -> print_endline line)
trace
let _ =
Printexc.record_backtrace true;
run [| "a" |];
run [| "b" |];
run [| "c" |];
run [| "d" |];
run [| |]
|
