From: Adrian Hunter Date: Mon, 3 Apr 2023 15:48:30 +0000 (+0300) Subject: perf auxtrace: Fix address filter entire kernel size X-Git-Tag: v6.1.37~1433 X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=376e662ebb483386fef8850914f9c306f0638cac;p=platform%2Fkernel%2Flinux-starfive.git perf auxtrace: Fix address filter entire kernel size commit 1f9f33ccf0320be21703d9195dd2b36a1c9a07cb upstream. kallsyms is not completely in address order. In find_entire_kern_cb(), calculate the kernel end from the maximum address not the last symbol. Example: Before: $ sudo cat /proc/kallsyms | grep ' [twTw] ' | tail -1 ffffffffc00b8bd0 t bpf_prog_6deef7357e7b4530 [bpf] $ sudo cat /proc/kallsyms | grep ' [twTw] ' | sort | tail -1 ffffffffc15e0cc0 t iwl_mvm_exit [iwlmvm] $ perf.d093603a05aa record -v --kcore -e intel_pt// --filter 'filter *' -- uname |& grep filter Address filter: filter 0xffffffff93200000/0x2ceba000 After: $ perf.8fb0f7a01f8e record -v --kcore -e intel_pt// --filter 'filter *' -- uname |& grep filter Address filter: filter 0xffffffff93200000/0x2e3e2000 Fixes: 1b36c03e356936d6 ("perf record: Add support for using symbols in address filters") Signed-off-by: Adrian Hunter Cc: Adrian Hunter Cc: Ian Rogers Cc: Jiri Olsa Cc: Namhyung Kim Cc: stable@vger.kernel.org Link: https://lore.kernel.org/r/20230403154831.8651-2-adrian.hunter@intel.com Signed-off-by: Arnaldo Carvalho de Melo Signed-off-by: Greg Kroah-Hartman --- diff --git a/tools/perf/util/auxtrace.c b/tools/perf/util/auxtrace.c index 6e60b6f..4445c5c 100644 --- a/tools/perf/util/auxtrace.c +++ b/tools/perf/util/auxtrace.c @@ -2443,6 +2443,7 @@ static int find_entire_kern_cb(void *arg, const char *name __maybe_unused, char type, u64 start) { struct sym_args *args = arg; + u64 size; if (!kallsyms__is_function(type)) return 0; @@ -2452,7 +2453,9 @@ static int find_entire_kern_cb(void *arg, const char *name __maybe_unused, args->start = start; } /* Don't know exactly where the kernel ends, so we add a page */ - args->size = round_up(start, page_size) + page_size - args->start; + size = round_up(start, page_size) + page_size - args->start; + if (size > args->size) + args->size = size; return 0; }