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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>,
	"Frank Ch. Eigler" <fche@redhat.com>,
	Ian Rogers <irogers@google.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 17/26] perf tools: Synthesize kernel with mmap3
Date: Sun, 13 Sep 2020 23:03:04 +0200	[thread overview]
Message-ID: <20200913210313.1985612-18-jolsa@kernel.org> (raw)
In-Reply-To: <20200913210313.1985612-1-jolsa@kernel.org>

Synthesizing kernel with mmap3 events so we can
get build id data for kernel map as well.

Signed-off-by: Jiri Olsa <jolsa@kernel.org>
---
 tools/perf/util/synthetic-events.c | 23 ++++++++++++++---------
 1 file changed, 14 insertions(+), 9 deletions(-)

diff --git a/tools/perf/util/synthetic-events.c b/tools/perf/util/synthetic-events.c
index 6bd2423ce2f3..844ca87b6e97 100644
--- a/tools/perf/util/synthetic-events.c
+++ b/tools/perf/util/synthetic-events.c
@@ -1029,7 +1029,7 @@ static int __perf_event__synthesize_kernel_mmap(struct perf_tool *tool,
 	 * available use this, and after it is use this as a fallback for older
 	 * kernels.
 	 */
-	event = zalloc((sizeof(event->mmap) + machine->id_hdr_size));
+	event = zalloc((sizeof(event->mmap3) + machine->id_hdr_size));
 	if (event == NULL) {
 		pr_debug("Not enough memory synthesizing mmap event "
 			 "for kernel modules\n");
@@ -1046,16 +1046,21 @@ static int __perf_event__synthesize_kernel_mmap(struct perf_tool *tool,
 		event->header.misc = PERF_RECORD_MISC_GUEST_KERNEL;
 	}
 
-	size = snprintf(event->mmap.filename, sizeof(event->mmap.filename),
+	size = snprintf(event->mmap3.filename, sizeof(event->mmap3.filename),
 			"%s%s", machine->mmap_name, kmap->ref_reloc_sym->name) + 1;
 	size = PERF_ALIGN(size, sizeof(u64));
-	event->mmap.header.type = PERF_RECORD_MMAP;
-	event->mmap.header.size = (sizeof(event->mmap) -
-			(sizeof(event->mmap.filename) - size) + machine->id_hdr_size);
-	event->mmap.pgoff = kmap->ref_reloc_sym->addr;
-	event->mmap.start = map->start;
-	event->mmap.len   = map->end - event->mmap.start;
-	event->mmap.pid   = machine->pid;
+	event->mmap3.header.type = PERF_RECORD_MMAP3;
+	event->mmap3.header.size = (sizeof(event->mmap3) -
+			(sizeof(event->mmap3.filename) - size) + machine->id_hdr_size);
+	event->mmap3.pgoff = kmap->ref_reloc_sym->addr;
+	event->mmap3.start = map->start;
+	event->mmap3.len   = map->end - event->mmap3.start;
+	event->mmap3.pid   = machine->pid;
+
+	err = sysfs__read_build_id("/sys/kernel/notes", event->mmap3.buildid,
+				   BUILD_ID_SIZE);
+	if (err)
+		pr_err("Failed to read kernel build ID\n");
 
 	err = perf_tool__process_synth_event(tool, event, machine, process);
 	free(event);
-- 
2.26.2


  parent reply	other threads:[~2020-09-13 21:05 UTC|newest]

Thread overview: 93+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-09-13 21:02 [RFC 00/26] perf: Add mmap3 support Jiri Olsa
2020-09-13 21:02 ` [PATCH 01/26] bpf: Move stack_map_get_build_id into lib Jiri Olsa
2020-09-14  6:09   ` Song Liu
2020-09-13 21:02 ` [PATCH 02/26] perf: Introduce mmap3 version of mmap event Jiri Olsa
2020-09-14  5:38   ` Namhyung Kim
2020-09-14  6:20     ` Song Liu
2020-09-14 19:38       ` Jiri Olsa
2020-09-14 15:28     ` Arnaldo Carvalho de Melo
2020-09-14 16:35       ` peterz
2020-09-14 17:08         ` Ian Rogers
2020-09-14 20:07           ` Jiri Olsa
2020-09-15  5:49             ` Adrian Hunter
2020-09-14 19:38         ` Jiri Olsa
2020-09-14 19:39       ` Jiri Olsa
2020-09-14 22:00         ` Arnaldo Carvalho de Melo
2020-09-15  5:39           ` Adrian Hunter
2020-09-14 19:38     ` Jiri Olsa
2020-09-15  2:54       ` Namhyung Kim
2020-09-14  6:41   ` Stephane Eranian
2020-09-14  9:08     ` peterz
2020-09-14 15:32       ` Arnaldo Carvalho de Melo
2020-09-14 17:26       ` Stephane Eranian
2020-09-14 19:56         ` Jiri Olsa
2020-09-15  0:03         ` Ian Rogers
2020-09-14 15:31     ` Arnaldo Carvalho de Melo
2020-09-14 19:50       ` Jiri Olsa
2020-09-14 22:38         ` Arnaldo Carvalho de Melo
2020-09-14 19:45     ` Jiri Olsa
2020-09-14  9:36   ` peterz
2020-09-13 21:02 ` [PATCH 03/26] tools headers uapi: Sync tools/include/uapi/linux/perf_event.h Jiri Olsa
2020-09-14  5:39   ` Namhyung Kim
2020-09-13 21:02 ` [PATCH 04/26] perf tools: Add filename__decompress function Jiri Olsa
2020-09-14 15:35   ` Arnaldo Carvalho de Melo
2020-09-14 20:43     ` Jiri Olsa
2020-09-17 18:54       ` Arnaldo Carvalho de Melo
2020-09-18 10:51         ` Jiri Olsa
2020-09-13 21:02 ` [PATCH 05/26] perf tools: Add build_id__is_defined function Jiri Olsa
2020-09-14  5:44   ` Namhyung Kim
2020-09-14 16:03     ` Arnaldo Carvalho de Melo
2020-09-14 20:49       ` Jiri Olsa
2020-09-14 20:47     ` Jiri Olsa
2020-09-14 21:51       ` Arnaldo Carvalho de Melo
2020-09-13 21:02 ` [PATCH 06/26] perf tools: Add support to read build id from compressed elf Jiri Olsa
2020-09-14 16:04   ` Arnaldo Carvalho de Melo
2020-09-14 20:49     ` Jiri Olsa
2020-09-13 21:02 ` [PATCH 07/26] perf tools: Add check for existing link in buildid dir Jiri Olsa
2020-09-14  5:54   ` Namhyung Kim
2020-09-14 20:18     ` Jiri Olsa
2020-09-13 21:02 ` [PATCH 08/26] perf tools: Use struct extra_kernel_map in machine__process_kernel_mmap_event Jiri Olsa
2020-09-13 21:02 ` [PATCH 09/26] perf tools: Try load vmlinux from buildid database Jiri Olsa
2020-09-14  6:25   ` Namhyung Kim
2020-09-14 20:29     ` Jiri Olsa
2020-09-15  2:58       ` Namhyung Kim
2020-09-13 21:02 ` [PATCH 10/26] perf tools: Enable mmap3 map event when supported Jiri Olsa
2020-09-14 16:05   ` Arnaldo Carvalho de Melo
2020-09-13 21:02 ` [PATCH 11/26] perf tools: Add mmap3 support Jiri Olsa
2020-09-13 21:02 ` [PATCH 12/26] perf tools: Set build id for kernel dso objects Jiri Olsa
2020-09-13 21:03 ` [PATCH 13/26] perf tools: Plug in mmap3 event Jiri Olsa
2020-09-13 21:03 ` [PATCH 14/26] perf tools: Add mmap3 events to --show-mmap-events option Jiri Olsa
2020-09-14  6:30   ` Namhyung Kim
2020-09-14 20:29     ` Jiri Olsa
2020-09-13 21:03 ` [PATCH 15/26] perf tools: Synthesize proc tasks with mmap3 Jiri Olsa
2020-09-14 16:07   ` Arnaldo Carvalho de Melo
2020-09-14 20:51     ` Jiri Olsa
2020-09-13 21:03 ` [PATCH 16/26] perf tools: Synthesize modules " Jiri Olsa
2020-09-14 16:07   ` Arnaldo Carvalho de Melo
2020-09-15 20:17     ` Ian Rogers
2020-09-16  8:20       ` Jiri Olsa
2020-09-16 14:07         ` Arnaldo Carvalho de Melo
2020-09-16 14:17           ` peterz
2020-09-16 15:10             ` Arnaldo Carvalho de Melo
2020-09-16 15:20               ` peterz
2020-09-16 15:21               ` Jiri Olsa
2020-09-16 15:42                 ` Arnaldo Carvalho de Melo
2020-09-13 21:03 ` Jiri Olsa [this message]
2020-09-14 16:08   ` [PATCH 17/26] perf tools: Synthesize kernel " Arnaldo Carvalho de Melo
2020-09-13 21:03 ` [PATCH 18/26] perf tests: Add mmap3 support for perf record test Jiri Olsa
2020-09-13 21:03 ` [PATCH 19/26] perf tools: Add buildid-list support for mmap3 Jiri Olsa
2020-09-13 21:03 ` [PATCH 20/26] perf tools: Add build_id_cache__add function Jiri Olsa
2020-09-14 16:13   ` Arnaldo Carvalho de Melo
2020-09-13 21:03 ` [PATCH 21/26] perf tools: Add machine__for_each_dso function Jiri Olsa
2020-09-14 16:15   ` Arnaldo Carvalho de Melo
2020-09-13 21:03 ` [PATCH 22/26] perf tools: Use machine__for_each_dso in perf_session__cache_build_ids Jiri Olsa
2020-09-13 21:03 ` [PATCH 23/26] perf tools: Add __perf_session__cache_build_ids function Jiri Olsa
2020-09-13 21:03 ` [PATCH 24/26] perf tools: Add buildid-list --store option Jiri Olsa
2020-09-14  6:42   ` Namhyung Kim
2020-09-14 15:14     ` Arnaldo Carvalho de Melo
2020-09-14 20:42       ` Jiri Olsa
2020-09-14 20:42     ` Jiri Olsa
2020-09-13 21:03 ` [PATCH 25/26] perf tools: Move debuginfo download code into get_debuginfo Jiri Olsa
2020-09-13 21:03 ` [PATCH 26/26] perf tools: Add report --store option Jiri Olsa
2020-09-14  5:25 ` [RFC 00/26] perf: Add mmap3 support Namhyung Kim
2020-09-14 15:13   ` Arnaldo Carvalho de Melo

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