Problem calling functions within gdb (version 7.5)

Saurabh T saurabh@hotmail.com
Thu Apr 25 15:45:00 GMT 2013


----------------------------------------
> Date: Thu, 25 Apr 2013 08:09:31 -0700
> From: keiths@redhat.com
> To: saurabh@hotmail.com
> CC: gdb@sourceware.org
> Subject: Re: Problem calling functions within gdb (version 7.5)
>
> On 04/25/2013 07:24 AM, Saurabh T wrote:
> >> From: tromey@redhat.com
> >>
> >> Saurabh> 1. call fn(3, x)
> >> Saurabh> gdb says: Cannot resolve function fn to any overloaded instance
> >> Saurabh> This used to work with gdb 7.2. The function signature completely
> >> Saurabh> matches the arguments so I dont know what it's complaining about.
> >>
> >> Please file a bug report.
> >
> > Done: http://sourceware.org/bugzilla/show_bug.cgi?id=15398
>
> Thank you. This was introduced in 7.2 with support for ADL. Looks like a
> bug in types_equal, which doesn't account for cv qualifiers.

It was introduced in 7.3. 7.2 works.

>
> >> Saurabh> 2. print k
> >> Saurabh> Let's say this prints 0x7ffb24
> >> Saurabh> call fn2(0x7ffb24)
> >> Saurabh> gdb again says: Cannot resolve function fn2 to any overloaded instance
> >> Saurabh> This also used to work with gdb 7.2. Here I can understand if
> >> Saurabh> promoting ints to arbitrary pointers is no longer supported.
> >>
> >> I was under the impression that we allowed this again, but it fails for
> >> me too. Please file another bug for this one.
> >
> > Done: http://sourceware.org/bugzilla/show_bug.cgi?id=15399
>
> What is "show check type"? If that is enabled/non-zero, gdb will not
> allow this conversion. If you disable it ("set check type 0"), it should
> work:
>
> (gdb) p fn2(0x7fffffffde14)
> Cannot resolve function fn2 to any overloaded instance
> (gdb) set check type 0

This does not work. show check type takes off/on; 0 gives an 
error to me. Neither off nor on print the value. Note that you need to 
compile with g++. Thanks. 		 	   		  


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