[patch] Do not allow unwinder to terminate inferior in an inferior function call if a C++ exception handler cannot be found.

[Eli Zaretskii]

> Date: Fri, 24 Apr 2009 09:32:36 +0100
> From: Phil Muldoon <pmuldoon@redhat.com>
> 
> +  add_setshow_boolean_cmd ("unwind-on-terminating-exception", no_class,
> +			   &unwind_on_terminating_exception_p, _("\
> +Set unwinding of stack if a std::terminate() call originates from\n\
> +the default C++ exception handler."), _("\
> +Show unwinding of stack if a std::terminate() call originates from\n\
> +the default C++ exception handler."), _("\

This is not good: the first sentence of a doc string should not take
more than one screen line, because various help commands, such as
`apropos', display only the first line.  How about

 Set unwinding of stack if std::terminate is called while in call dummy.

?

> +The unwind on terminating exception flag lets the user determine\n\
> +what gdb should do if a std::terminate() call is made from the\n\
> +default exception handler.\n\
> +The default is to unwind the frame."),

This doesn't tell what happens if it's set to OFF.

> +Similarly, with a C++ program  it is possible for the function you

Please use C@t{++} (here and elsewhere), it looks better in the
printed manual.

> +call via the @code{print} or @code{call} command to generate an
> +exception that is not handled due to the constraints of the dummy
> +frame.

I think ``due to the constraints of the dummy frame'' needs an
explanation.  I'm quite sure many C++ programmers will not immediately
grasp the nature of the problem.

> +@item set unwind-on-terminating-exception
> +@kindex set unwind-on-terminating-exception
> +@cindex unwind stack in called functions

There is already an index entry with identical text, so please change
this one to be more specific to the option you are adding.

> +Set unwinding of the stack if a C++ exception is raised but unhandled  
                                       ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
either
       exception is raised, but left unhandled
or
       exception is raised, but non handled

>            If set to off, @value{GDBN} the exception is delivered to
> +the default C++ exception handler.

This means the debuggee will be terminated, right?  If so, we should
mention that explicitly.

Other than that, the patch for the manual is approved.

Thanks.