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[PATCH 3/4] Support 'info proc' for native FreeBSD processes.

John Baldwin jhb@freebsd.org
Wed Jan 3 21:56:00 GMT 2018 
On Wednesday, January 03, 2018 02:13:28 PM Simon Marchi wrote:
> Hi John,
> 
> >> > +#ifdef HAVE_KINFO_GETVMMAP
> >> > +  if (do_mappings)
> >> > +    {
> >> > +      int nvment;
> >> > +      std::unique_ptr<struct kinfo_vmentry, free_deleter<struct kinfo_vmentry>>
> >> 
> >> Is there a reason to have and use free_deleter rather than 
> >> gdb::unique_xmalloc_ptr?
> >> 
> >> > +	vmentl (kinfo_getvmmap (pid, &nvment));
> > 
> > This function (kinfo_getvmmap) which is defined in the libutil library
> > included in
> > FreeBSD's base system calls malloc() internally, so the memory returned 
> > must be
> > freed with free() rather than xfree().  This deleter is already used 
> > earlier in
> > fbsd_find_memory_regions() for another call to kinfo_getvmmap() for
> > the same reason.
> 
> But isn't xfree just a wrapper around free?

Ah, for some reason I thought that xmalloc/xfree were a matched pair that could in
some cases refer to a separate malloc implementation, not always a wrapper around
normal malloc() / free().  I'll remove the deleter altogether (and it's one
existing use) in a future change.

-- 
John Baldwin
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