From mboxrd@z Thu Jan  1 00:00:00 1970
From: Andi Kleen <ak@linux.intel.com>
Subject: Re: CONFIG_DEBUG_INFO_SPLIT impacts on faddr2line
Date: Mon, 13 Nov 2017 13:41:48 -0800
Message-ID: <20171113214148.GP8522@tassilo.jf.intel.com>
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Cc: Fengguang Wu <fengguang.wu@intel.com>,
        Jeff Kirsher <jeffrey.t.kirsher@intel.com>,
        Network Development <netdev@vger.kernel.org>,
        "David S. Miller" <davem@davemloft.net>,
        Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
        intel-wired-lan@lists.osuosl.org, Michal Marek <mmarek@suse.cz>,
        Sam Ravnborg <sam@ravnborg.org>,
        Dirk Gouders <dirk@gouders.net>,
        Linux Kbuild mailing list <linux-kbuild@vger.kernel.org>,
        kbuild test robot <lkp@intel.com>,
        "Zhang, Rui" <rui.zhang@intel.com>,
        "Lu, Aaron" <aaron.lu@intel.com>, "H.J. Lu" <hjl.tools@gmail.com>
To: Linus Torvalds <torvalds@linux-foundation.org>
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On Mon, Nov 13, 2017 at 12:56:31PM -0800, Linus Torvalds wrote:
> On Mon, Nov 13, 2017 at 12:10 PM, Andi Kleen <ak@linux.intel.com> wrote:
> >
> > You're right. It works for line information, but strangely not for
> > inlines. I assume it can be fixed.
> 
> So I'm not 100% sure it's strictly a addr2line bug.

It seems to be broken for normal programs too

$ cat tinline.c

int i;

static inline int finline(void)
{
	i++;
}

main()
{
	finline();
}

$ gcc -O2 -gsplit-dwarf tinline.c
$ addr2line -i -e a.out 0x4003b0
/home/ak/tsrc/tinline.c:6
$ gcc -O2  -g tinline.c
$ addr2line -i -e a.out 0x4003b0
/home/ak/tsrc/tinline.c:6
/home/ak/tsrc/tinline.c:12
$

I filed https://sourceware.org/bugzilla/show_bug.cgi?id=22434


-Andi