From: Jiri Olsa <jolsa@kernel.org>
To: Arnaldo Carvalho de Melo <acme@kernel.org>
Cc: 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>, Ian Rogers <irogers@google.com>,
Stephane Eranian <eranian@google.com>,
Alexei Budankov <abudankov@huawei.com>,
Andi Kleen <ak@linux.intel.com>,
Adrian Hunter <adrian.hunter@intel.com>
Subject: [PATCH 05/15] perf tools: Do not swap mmap2 fields in case it contains build id
Date: Mon, 14 Dec 2020 11:54:47 +0100 [thread overview]
Message-ID: <20201214105457.543111-6-jolsa@kernel.org> (raw)
In-Reply-To: <20201214105457.543111-1-jolsa@kernel.org>
If PERF_RECORD_MISC_MMAP_BUILD_ID misc bit is set,
mmap2 event carries build id, placed in following union:
union {
struct {
u32 maj;
u32 min;
u64 ino;
u64 ino_generation;
};
struct {
u8 build_id_size;
u8 __reserved_1;
u16 __reserved_2;
u8 build_id[20];
};
};
In this case we can't swap above fields.
Signed-off-by: Jiri Olsa <jolsa@kernel.org>
---
tools/perf/util/session.c | 11 +++++++----
1 file changed, 7 insertions(+), 4 deletions(-)
diff --git a/tools/perf/util/session.c b/tools/perf/util/session.c
index 3b3c50b12791..29593494b67c 100644
--- a/tools/perf/util/session.c
+++ b/tools/perf/util/session.c
@@ -592,10 +592,13 @@ static void perf_event__mmap2_swap(union perf_event *event,
event->mmap2.start = bswap_64(event->mmap2.start);
event->mmap2.len = bswap_64(event->mmap2.len);
event->mmap2.pgoff = bswap_64(event->mmap2.pgoff);
- event->mmap2.maj = bswap_32(event->mmap2.maj);
- event->mmap2.min = bswap_32(event->mmap2.min);
- event->mmap2.ino = bswap_64(event->mmap2.ino);
- event->mmap2.ino_generation = bswap_64(event->mmap2.ino_generation);
+
+ if (!(event->header.misc & PERF_RECORD_MISC_MMAP_BUILD_ID)) {
+ event->mmap2.maj = bswap_32(event->mmap2.maj);
+ event->mmap2.min = bswap_32(event->mmap2.min);
+ event->mmap2.ino = bswap_64(event->mmap2.ino);
+ event->mmap2.ino_generation = bswap_64(event->mmap2.ino_generation);
+ }
if (sample_id_all) {
void *data = &event->mmap2.filename;
--
2.26.2
next prev parent reply other threads:[~2020-12-14 11:02 UTC|newest]
Thread overview: 27+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-12-14 10:54 [PATCHv5 00/15] perf: Add mmap2 build id support Jiri Olsa
2020-12-14 10:54 ` [PATCH 01/15] bpf: Move stack_map_get_build_id into lib Jiri Olsa
2020-12-15 15:49 ` Arnaldo Carvalho de Melo
2020-12-14 10:54 ` [PATCH 02/15] bpf: Add size arg to build_id_parse function Jiri Olsa
2020-12-14 10:54 ` [PATCH 03/15] perf: Add build id data in mmap2 event Jiri Olsa
2020-12-15 15:52 ` Arnaldo Carvalho de Melo
2020-12-15 22:01 ` Daniel Borkmann
2020-12-25 22:35 ` Jiri Olsa
2020-12-28 13:56 ` Arnaldo Carvalho de Melo
2020-12-14 10:54 ` [PATCH 04/15] tools headers uapi: Sync tools/include/uapi/linux/perf_event.h Jiri Olsa
2020-12-14 10:54 ` Jiri Olsa [this message]
2020-12-14 10:54 ` [PATCH 06/15] perf tools: Add support to read build id from compressed elf Jiri Olsa
2020-12-15 15:55 ` Arnaldo Carvalho de Melo
2020-12-28 13:01 ` Arnaldo Carvalho de Melo
2020-12-14 10:54 ` [PATCH 07/15] perf tools: Store build id from mmap2 events Jiri Olsa
2020-12-14 10:54 ` [PATCH 08/15] perf tools: Allow mmap2 event to synthesize kernel image Jiri Olsa
2020-12-14 10:54 ` [PATCH 09/15] perf tools: Allow mmap2 event to synthesize modules Jiri Olsa
2020-12-14 10:54 ` [PATCH 10/15] perf tools: Synthesize build id for kernel/modules/tasks Jiri Olsa
2020-12-14 10:54 ` [PATCH 11/15] perf tools: Add support to display build id for mmap2 events Jiri Olsa
2020-12-14 10:54 ` [PATCH 12/15] perf buildid-cache: Add support to add build ids from perf data Jiri Olsa
2020-12-14 10:54 ` [PATCH 13/15] perf buildid-cache: Add --debuginfod option Jiri Olsa
2020-12-15 15:53 ` Arnaldo Carvalho de Melo
2020-12-14 10:54 ` [PATCH 14/15] perf buildid-list: Add support for mmap2's buildid events Jiri Olsa
2020-12-14 10:54 ` [PATCH 15/15] perf record: Add --buildid-mmap option to enable mmap's build id Jiri Olsa
2020-12-28 13:44 ` Arnaldo Carvalho de Melo
2020-12-28 23:02 ` Jiri Olsa
2020-12-15 13:43 ` [PATCHv5 00/15] perf: Add mmap2 build id support Namhyung Kim
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