The patch below does not apply to the 4.9-stable tree. If someone wants it applied there, or to any other stable or longterm tree, then please email the backport, including the original git commit id to stable@vger.kernel.org.
Possible dependencies:
cba04f3136b6 ("perf auxtrace: Fix address filter symbol name match for modules") e85e0e0ccc60 ("perf tools: Use kallsyms__is_function()")
thanks,
greg k-h
------------------ original commit in Linus's tree ------------------
From cba04f3136b658583adb191556f99d087589c1cc Mon Sep 17 00:00:00 2001 From: Adrian Hunter adrian.hunter@intel.com Date: Wed, 26 Oct 2022 10:27:36 +0300 Subject: [PATCH] perf auxtrace: Fix address filter symbol name match for modules
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@intel.com Cc: Adrian Hunter adrian.hunter@intel.com Cc: Ian Rogers irogers@google.com Cc: Jiri Olsa jolsa@kernel.org Cc: Namhyung Kim namhyung@kernel.org Cc: stable@vger.kernel.org Link: https://lore.kernel.org/r/20221026072736.2982-1-adrian.hunter@intel.com Signed-off-by: Arnaldo Carvalho de Melo acme@redhat.com
diff --git a/tools/perf/util/auxtrace.c b/tools/perf/util/auxtrace.c index 60d8beb662aa..46ada5ec3f9a 100644 --- a/tools/perf/util/auxtrace.c +++ b/tools/perf/util/auxtrace.c @@ -2325,11 +2325,19 @@ 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));