lkml.org 
[lkml]   [2021]   [Feb]   [23]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: 'perf probe' and symbols from .text.<something>
Hi,

On Tue, 23 Feb 2021 00:05:08 +0900
Masami Hiramatsu <mhiramat@kernel.org> wrote:

> ----
> /* Adjust symbol name and address */
> static int post_process_probe_trace_point(struct probe_trace_point *tp,
> struct map *map, unsigned long offs)
> {
> struct symbol *sym;
> u64 addr = tp->address - offs;
>
> sym = map__find_symbol(map, addr);
> if (!sym)
> return -ENOENT;
> ----
>
> So it seems "map" may not load the symbol out of ".text".
> This need to be fixed, since the map is widely used in the perf.

OK, I found a root cause of this issue.
dso__process_kernel_symbol() (which invoked from map__load() path) only adds the
symbols in ".text" section to the symbol list. It must be fixed.

Thank you,

--
Masami Hiramatsu <mhiramat@kernel.org>

\
 
 \ /
  Last update: 2021-02-23 08:12    [W:0.099 / U:3.940 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site