From: John Baldwin <jhb@freebsd.org>
To: gdb-patches@sourceware.org
Cc: Simon Marchi <simark@simark.ca>, binutils@sourceware.org
Subject: Re: [PATCH 3/4] Support 'info proc' for native FreeBSD processes.
Date: Wed, 03 Jan 2018 21:56:00 -0000 [thread overview]
Message-ID: <1609352.MG7B8nrzjn@ralph.baldwin.cx> (raw)
In-Reply-To: <fa25abff20db4c10f7bfed366a07c582@simark.ca>
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
next prev parent reply other threads:[~2018-01-03 21:56 UTC|newest]
Thread overview: 18+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-12-22 22:05 [PATCH 0/4] Support for 'info proc' on FreeBSD cores and native John Baldwin
2017-12-22 22:05 ` [PATCH 2/4] Support 'info proc' for FreeBSD process core dumps John Baldwin
2017-12-27 1:56 ` Simon Marchi
2018-01-03 19:05 ` John Baldwin
2017-12-22 22:05 ` [PATCH 3/4] Support 'info proc' for native FreeBSD processes John Baldwin
2017-12-27 2:23 ` Simon Marchi
2018-01-03 19:05 ` John Baldwin
2018-01-03 19:13 ` Simon Marchi
2018-01-03 21:56 ` John Baldwin [this message]
2017-12-22 22:05 ` [PATCH 1/4] Create psuedo sections for FreeBSD NT_PROCSTAT_(PROC|FILES|VMMAP) notes John Baldwin
2017-12-27 1:18 ` Simon Marchi
2018-01-02 11:49 ` Nick Clifton
2017-12-22 22:13 ` [PATCH 4/4] Document support for 'info proc' on FreeBSD John Baldwin
2017-12-23 8:46 ` Eli Zaretskii
2017-12-27 1:53 ` [PATCH 0/4] Support for 'info proc' on FreeBSD cores and native Simon Marchi
2018-01-03 19:05 ` John Baldwin
2018-01-03 19:15 ` Simon Marchi
2018-01-03 23:39 ` John Baldwin
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