lkml.org 
[lkml]   [2009]   [Oct]   [12]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
DateMon, 12 Oct 2009 21:07:07 +0200
FromIngo Molnar <>
SubjectRe: [PATCH tracing/kprobes v3 6/7] perf: Add perf probe subcommand for kprobe-event setup helper

* Frederic Weisbecker <fweisbec@gmail.com> wrote:

> On Wed, Oct 07, 2009 at 06:28:23PM -0400, Masami Hiramatsu wrote:
> > Add perf probe subcommand for kprobe-event setup helper to perf command.
> > This allows user to define kprobe events by C expressions (C line numbers,
> > C function names, and C local variables).
> >
>
>
> My libdwarf.h and dwarf.h are available through <libdwarf.h> and
> <dwarf.h>, these are in /usr/include
>
> But even by fixing the include path in the makefile and probe-finder.h,
> I get the following build error:
>
> util/probe-finder.c: In function ‘die_get_entrypc’:
> util/probe-finder.c:222: erreur: ‘Dwarf_Ranges’ undeclared (first use in this function)
> util/probe-finder.c:222: erreur: (Each undeclared identifier is reported only once
> util/probe-finder.c:222: erreur: for each function it appears in.)
> util/probe-finder.c:222: erreur: ‘ranges’ undeclared (first use in this function)
> cc1: warnings being treated as errors
> util/probe-finder.c:223: erreur: ISO C90 forbids mixed declarations and code
> util/probe-finder.c:247: erreur: implicit declaration of function ‘dwarf_get_ranges’
> util/probe-finder.c:247: erreur: nested extern declaration of ‘dwarf_get_ranges’
> util/probe-finder.c:251: erreur: implicit declaration of function ‘dwarf_ranges_dealloc’
> util/probe-finder.c:251: erreur: nested extern declaration of ‘dwarf_ranges_dealloc’
> make: *** [util/probe-finder.o] Erreur 1
>
>
> I remember we talked about that before, but I don't remember well why it happened.
> This is because of a libdwarf version or something, right?
>
> Which one should I pick? Mine is:
>
> libdwarf.h
>
> $Revision: #9 $ $Date: 2008/01/17 $

if it's possible to still have a single set of APIs it would be nice to
auto-detect and massage all these libdwarf versions into a single
backend within perf.

Ingo
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/

\
 
 \ /
  Last update: 2009-10-12 21:13    [from the cache]
©2003-2010