This is a note to let you know that I've just added the patch titled
perf probe: Fix --funcs to show correct symbols for offline module
to the 4.9-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
perf-probe-fix-funcs-to-show-correct-symbols-for-offline-module.patch
and it can be found in the queue-4.9 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From eebc509b20881b92d62e317b2c073e57c5f200f0 Mon Sep 17 00:00:00 2001
From: Masami Hiramatsu <mhiramat@xxxxxxxxxx>
Date: Wed, 4 Jan 2017 12:29:05 +0900
Subject: perf probe: Fix --funcs to show correct symbols for offline module
From: Masami Hiramatsu <mhiramat@xxxxxxxxxx>
commit eebc509b20881b92d62e317b2c073e57c5f200f0 upstream.
Fix --funcs (-F) option to show correct symbols for offline module.
Since previous perf-probe uses machine__findnew_module_map() for offline
module, even if user passes a module file (with full path) which is for
other architecture, perf-probe always tries to load symbol map for
current kernel module.
This fix uses dso__new_map() to load the map from given binary as same
as a map for user applications.
Signed-off-by: Masami Hiramatsu <mhiramat@xxxxxxxxxx>
Cc: Jiri Olsa <jolsa@xxxxxxxxxx>
Cc: Namhyung Kim <namhyung@xxxxxxxxxx>
Cc: Peter Zijlstra <peterz@xxxxxxxxxxxxx>
Link: http://lkml.kernel.org/r/148350053478.19001.15435255244512631545.stgit@devbox
Signed-off-by: Arnaldo Carvalho de Melo <acme@xxxxxxxxxx>
Cc: Krister Johansen <kjlx@xxxxxxxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
tools/perf/util/probe-event.c | 25 ++++++-------------------
1 file changed, 6 insertions(+), 19 deletions(-)
--- a/tools/perf/util/probe-event.c
+++ b/tools/perf/util/probe-event.c
@@ -163,7 +163,7 @@ static struct map *kernel_get_module_map
/* A file path -- this is an offline module */
if (module && strchr(module, '/'))
- return machine__findnew_module_map(host_machine, 0, module);
+ return dso__new_map(module);
if (!module)
module = "kernel";
@@ -173,6 +173,7 @@ static struct map *kernel_get_module_map
if (strncmp(pos->dso->short_name + 1, module,
pos->dso->short_name_len - 2) == 0 &&
module[pos->dso->short_name_len - 2] == '\0') {
+ map__get(pos);
return pos;
}
}
@@ -188,15 +189,6 @@ struct map *get_target_map(const char *t
return kernel_get_module_map(target);
}
-static void put_target_map(struct map *map, bool user)
-{
- if (map && user) {
- /* Only the user map needs to be released */
- map__put(map);
- }
-}
-
-
static int convert_exec_to_group(const char *exec, char **result)
{
char *ptr1, *ptr2, *exec_copy;
@@ -412,7 +404,7 @@ static int find_alternative_probe_point(
}
out:
- put_target_map(map, uprobes);
+ map__put(map);
return ret;
}
@@ -2944,7 +2936,7 @@ static int find_probe_trace_events_from_
}
out:
- put_target_map(map, pev->uprobes);
+ map__put(map);
free(syms);
return ret;
@@ -3437,10 +3429,7 @@ int show_available_funcs(const char *tar
return ret;
/* Get a symbol map */
- if (user)
- map = dso__new_map(target);
- else
- map = kernel_get_module_map(target);
+ map = get_target_map(target, user);
if (!map) {
pr_err("Failed to get a map for %s\n", (target) ? : "kernel");
return -EINVAL;
@@ -3472,9 +3461,7 @@ int show_available_funcs(const char *tar
}
end:
- if (user) {
- map__put(map);
- }
+ map__put(map);
exit_probe_symbol_maps();
return ret;
Patches currently in stable-queue which might be from mhiramat@xxxxxxxxxx are
queue-4.9/perf-probe-fix-funcs-to-show-correct-symbols-for-offline-module.patch