diff options
| author | Feng Tang <[email protected]> | 2012-10-30 11:56:07 +0800 |
|---|---|---|
| committer | Arnaldo Carvalho de Melo <[email protected]> | 2012-10-29 11:56:59 -0200 |
| commit | e84ba4e26833991d1c1c15a592b1474ee2b6dfdb (patch) | |
| tree | a73d2b23c722ac3c1bbf08c075d124ccbe510ec7 | |
| parent | cdbab7c201ab38f7b8d248ebf289025381166526 (diff) | |
perf header: Add is_perf_magic() func
With this function, other modules can basically check whether a file is
a legal perf data file by checking its first 8 bytes against all
possible perf magic numbers.
Change the function name from check_perf_magic to more meaningful
is_perf_magic as suggested by acme.
Signed-off-by: Feng Tang <[email protected]>
Cc: Andi Kleen <[email protected]>
Cc: Ingo Molnar <[email protected]>
Cc: Namhyung Kim <[email protected]>
Cc: Peter Zijlstra <[email protected]>
Link: http://lkml.kernel.org/r/[email protected]
Signed-off-by: Arnaldo Carvalho de Melo <[email protected]>
| -rw-r--r-- | tools/perf/util/header.c | 10 | ||||
| -rw-r--r-- | tools/perf/util/header.h | 1 |
2 files changed, 11 insertions, 0 deletions
diff --git a/tools/perf/util/header.c b/tools/perf/util/header.c index 514ed1bd41a2..195a47a8f052 100644 --- a/tools/perf/util/header.c +++ b/tools/perf/util/header.c @@ -2341,6 +2341,16 @@ static int try_all_pipe_abis(uint64_t hdr_sz, struct perf_header *ph) return -1; } +bool is_perf_magic(u64 magic) +{ + if (!memcmp(&magic, __perf_magic1, sizeof(magic)) + || magic == __perf_magic2 + || magic == __perf_magic2_sw) + return true; + + return false; +} + static int check_magic_endian(u64 magic, uint64_t hdr_sz, bool is_pipe, struct perf_header *ph) { diff --git a/tools/perf/util/header.h b/tools/perf/util/header.h index 879d215cdac9..5f1cd6884f37 100644 --- a/tools/perf/util/header.h +++ b/tools/perf/util/header.h @@ -154,6 +154,7 @@ int perf_event__synthesize_build_id(struct perf_tool *tool, int perf_event__process_build_id(struct perf_tool *tool, union perf_event *event, struct perf_session *session); +bool is_perf_magic(u64 magic); /* * arch specific callback |