From: Feng Tang <feng.tang@intel.com>
To: Arnaldo Carvalho de Melo <acme@redhat.com>,
Peter Zijlstra <peterz@infradead.org>,
Ingo Molnar <mingo@elte.hu>, Namhyung Kim <namhyung@kernel.org>,
Andi Kleen <andi@firstfloor.org>,
linux-kernel@vger.kernel.org
Cc: Feng Tang <feng.tang@intel.com>
Subject: [PATCH v5 6/8] perf header: Add is_perf_magic() func
Date: Tue, 30 Oct 2012 11:56:07 +0800 [thread overview]
Message-ID: <1351569369-26732-7-git-send-email-feng.tang@intel.com> (raw)
In-Reply-To: <1351569369-26732-1-git-send-email-feng.tang@intel.com>
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 <feng.tang@intel.com>
---
| 10 ++++++++++
| 1 +
2 files changed, 11 insertions(+)
--git a/tools/perf/util/header.c b/tools/perf/util/header.c
index 7daad23..87e679e 100644
--- a/tools/perf/util/header.c
+++ b/tools/perf/util/header.c
@@ -2340,6 +2340,16 @@ 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)
{
--git a/tools/perf/util/header.h b/tools/perf/util/header.h
index 879d215..5f1cd68 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
--
1.7.9.5
next prev parent reply other threads:[~2012-10-29 3:57 UTC|newest]
Thread overview: 19+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-10-30 3:56 [PATCH v5 0/8] perf tools: Add script browser and runtime data file switch Feng Tang
2012-10-30 3:56 ` [PATCH v5 1/8] perf tool: Add a global variable "const char *input_name" Feng Tang
2012-10-30 12:05 ` [tip:perf/core] perf tools: Add a global variable " const " tip-bot for Feng Tang
2012-10-30 3:56 ` [PATCH v5 2/8] perf script: Add more filter to find_scripts() Feng Tang
2012-10-30 12:06 ` [tip:perf/core] " tip-bot for Feng Tang
2012-10-30 3:56 ` [PATCH v5 3/8] perf ui/browser: Add a browser for perf script Feng Tang
2012-10-30 12:07 ` [tip:perf/core] perf scripts browser: " tip-bot for Feng Tang
2012-10-30 3:56 ` [PATCH v5 4/8] perf ui/browser: Integrate script browser into annotation browser Feng Tang
2012-10-30 12:08 ` [tip:perf/core] perf annotate browser: " tip-bot for Feng Tang
2012-10-30 3:56 ` [PATCH v5 5/8] perf ui/browser: Integrate script browser into main hists browser Feng Tang
2012-10-29 14:54 ` Arnaldo Carvalho de Melo
2012-10-30 16:05 ` Feng Tang
2012-10-30 12:09 ` [tip:perf/core] perf hists browser: " tip-bot for Feng Tang
2012-10-30 3:56 ` Feng Tang [this message]
2012-10-30 12:10 ` [tip:perf/core] perf header: Add is_perf_magic() func tip-bot for Feng Tang
2012-10-30 3:56 ` [PATCH v5 7/8] perf hists browser: Add option for runtime switching perf data file Feng Tang
2012-10-29 14:06 ` Arnaldo Carvalho de Melo
2012-10-30 16:01 ` Feng Tang
2012-10-30 3:56 ` [PATCH v5 8/8] perf report: Enable the runtime switching of " Feng Tang
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