Messages in this thread | | | Subject | Re: [PATCH] trace-cmd: Leave out absolute addresses to fix bogus symbol resolutions | From | Jan Kiszka <> | Date | Tue, 15 Sep 2015 18:30:22 +0200 |
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On 2015-07-31 16:04, Jan Kiszka wrote: > On x86, page_fault_* tracepoints report userspace address via kernel > symbols because all the per-cpu variable offsets are in kallsyms, > occupying the lower address space. Fix this by skipping over absolute > addresses while processing kallsyms. > > Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com> > --- > trace-util.c | 8 ++++++-- > 1 file changed, 6 insertions(+), 2 deletions(-) > > diff --git a/trace-util.c b/trace-util.c > index 8a81dd0..da20e4c 100644 > --- a/trace-util.c > +++ b/trace-util.c > @@ -434,8 +434,12 @@ void parse_proc_kallsyms(struct pevent *pevent, > if (mod) > mod[strlen(mod) - 1] = 0; > > - /* Hack for arm arch that adds a lot of bogus '$a' functions */ > - if (func[0] != '$') > + /* > + * Hacks for > + * - arm arch that adds a lot of bogus '$a' functions > + * - x86-64 that reports per-cpu variable offsets as absolute > + */ > + if (func[0] != '$' && ch != 'A') > pevent_register_function(pevent, func, addr, mod); > free(func); > free(mod); >
Ping.
Jan
-- Siemens AG, Corporate Technology, CT RTC ITP SES-DE Corporate Competence Center Embedded Linux
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