main: Record and print full exception stack traces.

This turns on stack trace recording unconditionally (the same
effect as if OCAMLRUNPARAM=b was always supplied), and also prints
stack traces to the log file if there is an exception.

See also:
http://caml.inria.fr/pub/docs/manual-ocaml/libref/Printexc.html

Note that this requires OCaml >= 3.11.0.

diff --git a/README b/README
index 0e56218..a3ef5dc 100644 (file)
--- a/README
+++ b/README
@@ -1,7 +1,7 @@
 virt-top
 ----------------------------------------------------------------------
 
-Copyright (C) 2007-2009 Richard W.M. Jones, Red Hat Inc.
+Copyright (C) 2007-2011 Richard W.M. Jones, Red Hat Inc.
 http://et.redhat.com/~rjones/virt-top/
 http://libvirt.org/ocaml/
 http://libvirt.org/
@@ -17,6 +17,9 @@ different virtualization systems.
 Building
 ----------------------------------------------------------------------
 
+Note that the minimum version of OCaml supported (since 1.0.5) is
+OCaml 3.11.0.
+
   ./configure           # Checks that you have all the required bits.
 
   make all             # Builds the bytecode version of the program.

diff --git a/virt-top/virt_top_main.ml b/virt-top/virt_top_main.ml
index 4e1c5b7..4e5c07b 100644 (file)
--- a/virt-top/virt_top_main.ml
+++ b/virt-top/virt_top_main.ml
@@ -34,6 +34,7 @@ let error =
   let ((_, _, script_mode, _, _, _, _) as setup) = start_up () in
 
   try
+    Printexc.record_backtrace true;
     main_loop setup;
     if not script_mode then endwin ();
     false
@@ -41,10 +42,12 @@ let error =
   | Libvirt.Virterror err ->
       if not script_mode then endwin ();
       prerr_endline (Libvirt.Virterror.to_string err);
+      Printexc.print_backtrace stderr;
       true
   | exn ->
       if not script_mode then endwin ();
       prerr_endline (s_ "Error" ^ ": " ^ Printexc.to_string exn);
+      Printexc.print_backtrace stderr;
       true
 
 let () =