With this func, other modules can basically check whether a file
is a legal perf data file by checking its first 8 bytes aginst
all possible perf magic nunbers.
Signed-off-by: Feng Tang <feng.t...@intel.com>
---
tools/perf/util/header.c | 11 +++++++++++
tools/perf/util/header.h | 1 +
2 files changed, 12 insertions(+), 0 deletions(-)
diff --git a/tools/perf/util/header.c b/tools/perf/util/header.c
index ad72b28..555cb68 100644
--- a/tools/perf/util/header.c
+++ b/tools/perf/util/header.c
@@ -2174,6 +2174,17 @@ static int try_all_pipe_abis(uint64_t hdr_sz, struct
perf_header *ph)
return -1;
}
+/* Return 0 if matched */
+int check_perf_magic(u64 magic)
+{
+ if (!memcmp(&magic, __perf_magic1, sizeof(magic))
+ || magic == __perf_magic2
+ || magic == __perf_magic2_sw)
+ return 0;
+
+ return -1;
+}
+
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 58de08b..af1a51c 100644
--- a/tools/perf/util/header.h
+++ b/tools/perf/util/header.h
@@ -131,6 +131,7 @@ 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);
+int check_perf_magic(u64 magic);
/*
* arch specific callback
--
1.7.1
--
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