This is a note to let you know that I've just added the patch titled
perf auxtrace: Fix address filter symbol name match for modules
to the 5.4-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-auxtrace-fix-address-filter-symbol-name-match-for-modules.patch
and it can be found in the queue-5.4 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From cba04f3136b658583adb191556f99d087589c1cc Mon Sep 17 00:00:00 2001
From: Adrian Hunter <adrian.hunter@xxxxxxxxx>
Date: Wed, 26 Oct 2022 10:27:36 +0300
Subject: perf auxtrace: Fix address filter symbol name match for modules
From: Adrian Hunter <adrian.hunter@xxxxxxxxx>
commit cba04f3136b658583adb191556f99d087589c1cc upstream.
For modules, names from kallsyms__parse() contain the module name which
meant that module symbols did not match exactly by name.
Fix by matching the name string up to the separating tab character.
Fixes: 1b36c03e356936d6 ("perf record: Add support for using symbols in address filters")
Signed-off-by: Adrian Hunter <adrian.hunter@xxxxxxxxx>
Cc: Adrian Hunter <adrian.hunter@xxxxxxxxx>
Cc: Ian Rogers <irogers@xxxxxxxxxx>
Cc: Jiri Olsa <jolsa@xxxxxxxxxx>
Cc: Namhyung Kim <namhyung@xxxxxxxxxx>
Cc: stable@xxxxxxxxxxxxxxx
Link: https://lore.kernel.org/r/20221026072736.2982-1-adrian.hunter@xxxxxxxxx
Signed-off-by: Arnaldo Carvalho de Melo <acme@xxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
tools/perf/util/auxtrace.c | 10 +++++++++-
1 file changed, 9 insertions(+), 1 deletion(-)
--- a/tools/perf/util/auxtrace.c
+++ b/tools/perf/util/auxtrace.c
@@ -1710,11 +1710,19 @@ struct sym_args {
bool near;
};
+static bool kern_sym_name_match(const char *kname, const char *name)
+{
+ size_t n = strlen(name);
+
+ return !strcmp(kname, name) ||
+ (!strncmp(kname, name, n) && kname[n] == '\t');
+}
+
static bool kern_sym_match(struct sym_args *args, const char *name, char type)
{
/* A function with the same name, and global or the n'th found or any */
return kallsyms__is_function(type) &&
- !strcmp(name, args->name) &&
+ kern_sym_name_match(name, args->name) &&
((args->global && isupper(type)) ||
(args->selected && ++(args->cnt) == args->idx) ||
(!args->global && !args->selected));
Patches currently in stable-queue which might be from adrian.hunter@xxxxxxxxx are
queue-5.4/perf-auxtrace-fix-address-filter-symbol-name-match-for-modules.patch
