[lldb-dev] sharing code between lldb and AddressSanitizer

[Dmitry Vyukov]

On Mon, Mar 26, 2012 at 9:22 PM, Greg Clayton <gclayton at apple.com> wrote:

> Dmitry,
>
> Can you attach an example ELF file with DWARF and the main.cpp source file
> to the bug so that I can take a look? "-pie" is not a valid argument for
> our current darwin clang++, so this might be a linux specific compiler
> driver option.
>
>
Hi Greg,

I've attached source and binary:
http://llvm.org/bugs/show_bug.cgi?id=12355


On Mar 26, 2012, at 2:16 AM, Dmitry Vyukov wrote:
>
> > On Wed, Feb 29, 2012 at 12:50 PM, Dmitry Vyukov <dvyukov at google.com>
> wrote:
> > On Tue, Feb 28, 2012 at 10:25 PM, Greg Clayton <gclayton at apple.com>
> wrote:
> > > Ironically the symbolizer works great on gcc-compiled binaries,
> > > but fails on clang-compiled binaries.
> > > It provides some info but it's dead wrong (point into some
> > > random STL source files).
> > > objdump -dlS shows
> > > correct info for the binaries, and I guess you mostly work with
> > > clang-compiled binaries.
> > > So are there any known problems? What may I be missing?
> >
> > Not that we know of. Clang binaries work great on MacOSX and symbolicate
> just fine. If you have any quick examples where address lookups fail,
> please send me examples off the list.
> >
> >
> > I've tracked down the problem.
> > When I build the lookup example as
> > $ clang++ main.cpp -I../../include -llldb -g -frtti
> > It works.
> > However when I build it as:
> > $ clang++ main.cpp -I../../include -llldb -g -frtti -fPIE -pie
> > It fails to symbolize itself. While objdump -dSl symbolizes it (shows
> line numbers inside of functions). If I build a program with gcc with -fPIE
> -pie, it also able to symbolize itself (with lldb).
> > So, the problem seems to be in tricky interaction of clang, lldb and
> -pie.
> > It's all Linux/amd64 and tip clang.
> >
> >
> > Ping. Any progress on this? It's critical for us, we build everything
> only with -pie, so this thing renders lldb useless for us. I've filed an
> issue:
> > http://llvm.org/bugs/show_bug.cgi?id=12355
> >
>
>
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