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| author | Adrian Hunter <adrian.hunter@intel.com> | 2023-04-03 18:48:30 +0300 |
|---|---|---|
| committer | Arnaldo Carvalho de Melo <acme@redhat.com> | 2023-04-04 09:39:57 -0300 |
| commit | 1f9f33ccf0320be21703d9195dd2b36a1c9a07cb (patch) | |
| tree | ea75303a6ea8b71212e50705ecd39b3ea092fffd /tools/perf/util/auxtrace.c | |
| parent | 34fb60400e3257f3a046ee8e6b49242cf65cc1a3 (diff) | |
| download | linux-stable-1f9f33ccf0320be21703d9195dd2b36a1c9a07cb.tar.gz linux-stable-1f9f33ccf0320be21703d9195dd2b36a1c9a07cb.tar.bz2 linux-stable-1f9f33ccf0320be21703d9195dd2b36a1c9a07cb.zip | |
perf auxtrace: Fix address filter entire kernel size
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 <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/20230403154831.8651-2-adrian.hunter@intel.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Diffstat (limited to 'tools/perf/util/auxtrace.c')
| -rw-r--r-- | tools/perf/util/auxtrace.c | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/tools/perf/util/auxtrace.c b/tools/perf/util/auxtrace.c index 498ff7f24463..b2a5e5397bad 100644 --- a/tools/perf/util/auxtrace.c +++ b/tools/perf/util/auxtrace.c @@ -2449,6 +2449,7 @@ 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; @@ -2458,7 +2459,9 @@ 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; } |