Re: PR13901

[Tristan Gingold <gingold@adacore.com>]

On Mar 30, 2012, at 3:42 PM, Jack Howarth wrote:

> Tristan,
>   Have you noticed that recent FSF gdb releases including 7.4 have been
> non-functional when built targeting i386-apple-darwin? The run-time failures
> have changed between 7.2 and 7.4. Currently the failure is exhibited as
> errors of the form...
> 
> (gdb) break main
> Breakpoint 1 at 0xd80: file himenoBMTxpa.c, line 71.
> (gdb) r
> Starting program: /Users/howarth/a.out 
> darwin_set_sstep: unknown flavour: 4
> Error calling thread_get_state for GP registers for thread 0x8451lxwarning:
> Mach error at "i386-darwin-nat.c:118" in function
> "i386_darwin_fetch_inferior_registers": (os/kern) invalid argument (0x4)
> 
> http://sourceware.org/bugzilla/show_bug.cgi?id=13901
> 
> Is this something that is trivial to fix? It would be nice if both MacPorts
> and fink could have a functional i386 build of FSF gdb. In fink, we currently
> have gdb restricted to x86_64 fink (although the x86_64-apple-darwin build
> can debug i386 binaries fine). MacPorts has left their gdb pacakge at 7.1
> (which I guess is that last version that worked for both i386-apple-darwin
> and x86_64-apple-darwin. Thanks in advance for any clarifications.

I now understand the issue:

gdb spawns bash to run the program, but the bash spawned is 64 bits, which is not understood by gdb...

Tristan.