From: Jiri Olsa <jolsa@kernel.org>
To: Arnaldo Carvalho de Melo <acme@kernel.org>
Cc: Ian Rogers <irogers@google.com>,
lkml <linux-kernel@vger.kernel.org>,
Peter Zijlstra <a.p.zijlstra@chello.nl>,
Ingo Molnar <mingo@kernel.org>,
Mark Rutland <mark.rutland@arm.com>,
Namhyung Kim <namhyung@kernel.org>,
Alexander Shishkin <alexander.shishkin@linux.intel.com>,
Michael Petlan <mpetlan@redhat.com>,
Song Liu <songliubraving@fb.com>,
Stephane Eranian <eranian@google.com>,
Alexey Budankov <alexey.budankov@linux.intel.com>,
Andi Kleen <ak@linux.intel.com>,
Adrian Hunter <adrian.hunter@intel.com>
Subject: [PATCH 20/25] perf tools: Add is_perf_data function
Date: Thu, 26 Nov 2020 18:00:21 +0100 [thread overview]
Message-ID: <20201126170026.2619053-21-jolsa@kernel.org> (raw)
In-Reply-To: <20201126170026.2619053-1-jolsa@kernel.org>
Adding is_perf_data function that returns true if
the given path is perf data file. It will be used
in following patches.
Acked-by: Ian Rogers <irogers@google.com>
Signed-off-by: Jiri Olsa <jolsa@kernel.org>
---
tools/perf/util/data.c | 19 +++++++++++++++++++
tools/perf/util/data.h | 1 +
2 files changed, 20 insertions(+)
diff --git a/tools/perf/util/data.c b/tools/perf/util/data.c
index 05bbcb663c41..f29af4fc3d09 100644
--- a/tools/perf/util/data.c
+++ b/tools/perf/util/data.c
@@ -492,3 +492,22 @@ char *perf_data__kallsyms_name(struct perf_data *data)
return kallsyms_name;
}
+
+bool is_perf_data(const char *path)
+{
+ bool ret = false;
+ FILE *file;
+ u64 magic;
+
+ file = fopen(path, "r");
+ if (!file)
+ return false;
+
+ if (fread(&magic, 1, 8, file) < 8)
+ goto out;
+
+ ret = is_perf_magic(magic);
+out:
+ fclose(file);
+ return ret;
+}
diff --git a/tools/perf/util/data.h b/tools/perf/util/data.h
index c563fcbb0288..62a3e66fbee8 100644
--- a/tools/perf/util/data.h
+++ b/tools/perf/util/data.h
@@ -98,4 +98,5 @@ int perf_data__update_dir(struct perf_data *data);
unsigned long perf_data__size(struct perf_data *data);
int perf_data__make_kcore_dir(struct perf_data *data, char *buf, size_t buf_sz);
char *perf_data__kallsyms_name(struct perf_data *data);
+bool is_perf_data(const char *path);
#endif /* __PERF_DATA_H */
--
2.26.2
next prev parent reply other threads:[~2020-11-26 17:02 UTC|newest]
Thread overview: 48+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-11-26 17:00 [PATCHv4 00/25] perf: Add mmap2 build id support Jiri Olsa
2020-11-26 17:00 ` [PATCH 01/25] bpf: Move stack_map_get_build_id into lib Jiri Olsa
2020-11-26 17:00 ` [PATCH 02/25] bpf: Add size arg to build_id_parse function Jiri Olsa
2020-12-03 19:24 ` Jiri Olsa
2020-12-03 21:23 ` Song Liu
2020-12-04 23:30 ` Jiri Olsa
2020-11-26 17:00 ` [PATCH 03/25] perf: Add build id data in mmap2 event Jiri Olsa
2020-11-26 17:00 ` [PATCH 04/25] tools headers uapi: Sync tools/include/uapi/linux/perf_event.h Jiri Olsa
2020-11-26 17:00 ` [PATCH 05/25] tools lib: Adopt memchr_inv() from kernel Jiri Olsa
2020-11-26 17:42 ` Arnaldo Carvalho de Melo
2020-11-26 17:00 ` [PATCH 06/25] perf tools: Do not swap mmap2 fields in case it contains build id Jiri Olsa
2020-11-26 17:30 ` Arnaldo Carvalho de Melo
2020-11-27 19:46 ` Jiri Olsa
2020-11-26 17:00 ` [PATCH 07/25] perf tools: Add build_id__is_defined function Jiri Olsa
2020-11-26 17:43 ` Arnaldo Carvalho de Melo
2020-11-26 17:00 ` [PATCH 08/25] perf tools: Add filename__decompress function Jiri Olsa
2020-11-26 17:44 ` Arnaldo Carvalho de Melo
2020-11-26 17:00 ` [PATCH 09/25] perf tools: Add support to read build id from compressed elf Jiri Olsa
2020-11-26 17:46 ` Arnaldo Carvalho de Melo
2020-11-27 19:45 ` Jiri Olsa
2020-11-26 17:00 ` [PATCH 10/25] perf tools: Add check for existing link in buildid dir Jiri Olsa
2020-11-26 17:47 ` Arnaldo Carvalho de Melo
2020-11-26 17:00 ` [PATCH 11/25] perf tools: Use struct extra_kernel_map in machine__process_kernel_mmap_event Jiri Olsa
2020-11-26 17:48 ` Arnaldo Carvalho de Melo
2020-11-26 17:00 ` [PATCH 12/25] perf tools: Try to load vmlinux from buildid database Jiri Olsa
2020-11-26 17:50 ` Arnaldo Carvalho de Melo
2020-11-26 17:00 ` [PATCH 13/25] perf tools: Store build id from mmap2 events Jiri Olsa
2020-11-26 17:00 ` [PATCH 14/25] perf tools: Allow mmap2 event to synthesize kernel image Jiri Olsa
2020-11-26 17:00 ` [PATCH 15/25] perf tools: Allow mmap2 event to synthesize modules Jiri Olsa
2020-11-26 17:00 ` [PATCH 16/25] perf tools: Synthesize build id for kernel/modules/tasks Jiri Olsa
2020-11-26 17:00 ` [PATCH 17/25] perf tools: Add support to display build id for mmap2 events Jiri Olsa
2020-11-26 17:00 ` [PATCH 18/25] perf tools: Use machine__for_each_dso in perf_session__cache_build_ids Jiri Olsa
2020-11-26 17:52 ` Arnaldo Carvalho de Melo
2020-11-26 17:00 ` [PATCH 19/25] perf tools: Add __perf_session__cache_build_ids function Jiri Olsa
2020-11-26 17:53 ` Arnaldo Carvalho de Melo
2020-11-26 17:00 ` Jiri Olsa [this message]
2020-11-26 17:51 ` [PATCH 20/25] perf tools: Add is_perf_data function Arnaldo Carvalho de Melo
2020-11-26 17:00 ` [PATCH 21/25] perf tools: Add build_id_cache__add function Jiri Olsa
2020-11-26 17:53 ` Arnaldo Carvalho de Melo
2020-11-26 17:00 ` [PATCH 22/25] perf buildid-cache: Add support to add build ids from perf data Jiri Olsa
2020-11-26 17:57 ` Arnaldo Carvalho de Melo
2020-11-27 19:49 ` Jiri Olsa
2020-11-26 17:00 ` [PATCH 23/25] perf buildid-cache: Add --debuginfod option Jiri Olsa
2020-11-26 17:00 ` [PATCH 24/25] perf buildid-list: Add support for mmap2's buildid events Jiri Olsa
2020-11-26 17:00 ` [PATCH 25/25] perf record: Add --buildid-mmap option to enable mmap's build id Jiri Olsa
2020-11-26 17:40 ` Arnaldo Carvalho de Melo
2020-11-27 4:41 ` [PATCHv4 00/25] perf: Add mmap2 build id support Namhyung Kim
-- strict thread matches above, loose matches on Subject: below --
2020-11-23 23:04 [PATCHv3 " Jiri Olsa
2020-11-23 23:05 ` [PATCH 20/25] perf tools: Add is_perf_data function Jiri Olsa
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20201126170026.2619053-21-jolsa@kernel.org \
--to=jolsa@kernel.org \
--cc=a.p.zijlstra@chello.nl \
--cc=acme@kernel.org \
--cc=adrian.hunter@intel.com \
--cc=ak@linux.intel.com \
--cc=alexander.shishkin@linux.intel.com \
--cc=alexey.budankov@linux.intel.com \
--cc=eranian@google.com \
--cc=irogers@google.com \
--cc=linux-kernel@vger.kernel.org \
--cc=mark.rutland@arm.com \
--cc=mingo@kernel.org \
--cc=mpetlan@redhat.com \
--cc=namhyung@kernel.org \
--cc=songliubraving@fb.com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).