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>,
Alexey Budankov <alexey.budankov@linux.intel.com>,
Andi Kleen <ak@linux.intel.com>,
Adrian Hunter <adrian.hunter@intel.com>
Subject: [PATCH 14/24] perf tools: Allow mmap2 event to synthesize modules
Date: Mon, 9 Nov 2020 22:54:05 +0100 [thread overview]
Message-ID: <20201109215415.400153-15-jolsa@kernel.org> (raw)
In-Reply-To: <20201109215415.400153-1-jolsa@kernel.org>
Allow mmap2 event to synthesize kernel modules,
so we can synthesize module's build id data in
following changes.
It's enabled by new symbol_conf.buildid_mmap2
bool, which will be switched in following
changes.
Signed-off-by: Jiri Olsa <jolsa@kernel.org>
---
tools/perf/util/synthetic-events.c | 49 +++++++++++++++++++-----------
1 file changed, 32 insertions(+), 17 deletions(-)
diff --git a/tools/perf/util/synthetic-events.c b/tools/perf/util/synthetic-events.c
index 872df6d6dbef..a18ae502d765 100644
--- a/tools/perf/util/synthetic-events.c
+++ b/tools/perf/util/synthetic-events.c
@@ -593,16 +593,17 @@ int perf_event__synthesize_modules(struct perf_tool *tool, perf_event__handler_t
int rc = 0;
struct map *pos;
struct maps *maps = machine__kernel_maps(machine);
- union perf_event *event = zalloc((sizeof(event->mmap) +
- machine->id_hdr_size));
+ union perf_event *event;
+ size_t size = symbol_conf.buildid_mmap2 ?
+ sizeof(event->mmap2) : sizeof(event->mmap);
+
+ event = zalloc(size + machine->id_hdr_size);
if (event == NULL) {
pr_debug("Not enough memory synthesizing mmap event "
"for kernel modules\n");
return -1;
}
- event->header.type = PERF_RECORD_MMAP;
-
/*
* kernel uses 0 for user space maps, see kernel/perf_event.c
* __perf_event_mmap
@@ -613,23 +614,37 @@ int perf_event__synthesize_modules(struct perf_tool *tool, perf_event__handler_t
event->header.misc = PERF_RECORD_MISC_GUEST_KERNEL;
maps__for_each_entry(maps, pos) {
- size_t size;
-
if (!__map__is_kmodule(pos))
continue;
- size = PERF_ALIGN(pos->dso->long_name_len + 1, sizeof(u64));
- event->mmap.header.type = PERF_RECORD_MMAP;
- event->mmap.header.size = (sizeof(event->mmap) -
- (sizeof(event->mmap.filename) - size));
- memset(event->mmap.filename + size, 0, machine->id_hdr_size);
- event->mmap.header.size += machine->id_hdr_size;
- event->mmap.start = pos->start;
- event->mmap.len = pos->end - pos->start;
- event->mmap.pid = machine->pid;
+ if (symbol_conf.buildid_mmap2) {
+ size = PERF_ALIGN(pos->dso->long_name_len + 1, sizeof(u64));
+ event->mmap2.header.type = PERF_RECORD_MMAP2;
+ event->mmap2.header.size = (sizeof(event->mmap2) -
+ (sizeof(event->mmap2.filename) - size));
+ memset(event->mmap2.filename + size, 0, machine->id_hdr_size);
+ event->mmap2.header.size += machine->id_hdr_size;
+ event->mmap2.start = pos->start;
+ event->mmap2.len = pos->end - pos->start;
+ event->mmap2.pid = machine->pid;
+
+ memcpy(event->mmap2.filename, pos->dso->long_name,
+ pos->dso->long_name_len + 1);
+ } else {
+ size = PERF_ALIGN(pos->dso->long_name_len + 1, sizeof(u64));
+ event->mmap.header.type = PERF_RECORD_MMAP;
+ event->mmap.header.size = (sizeof(event->mmap) -
+ (sizeof(event->mmap.filename) - size));
+ memset(event->mmap.filename + size, 0, machine->id_hdr_size);
+ event->mmap.header.size += machine->id_hdr_size;
+ event->mmap.start = pos->start;
+ event->mmap.len = pos->end - pos->start;
+ event->mmap.pid = machine->pid;
+
+ memcpy(event->mmap.filename, pos->dso->long_name,
+ pos->dso->long_name_len + 1);
+ }
- memcpy(event->mmap.filename, pos->dso->long_name,
- pos->dso->long_name_len + 1);
if (perf_tool__process_synth_event(tool, event, machine, process) != 0) {
rc = -1;
break;
--
2.26.2
next prev parent reply other threads:[~2020-11-09 21:56 UTC|newest]
Thread overview: 52+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-11-09 21:53 [PATCH 00/24] perf: Add mmap2 build id support Jiri Olsa
2020-11-09 21:53 ` [PATCH 01/24] bpf: Move stack_map_get_build_id into lib Jiri Olsa
2020-11-09 21:53 ` [PATCH 02/24] bpf: Add build_id_parse_size function Jiri Olsa
2020-11-10 0:15 ` Alexei Starovoitov
2020-11-10 10:01 ` Jiri Olsa
2020-11-09 21:53 ` [PATCH 03/24] perf: Add build id data in mmap2 event Jiri Olsa
2020-11-10 8:07 ` Peter Zijlstra
2020-11-10 10:08 ` Jiri Olsa
2020-11-10 11:54 ` Arnaldo Carvalho de Melo
2020-11-10 12:22 ` Peter Zijlstra
2020-11-10 15:25 ` Arnaldo Carvalho de Melo
2020-11-10 8:28 ` Peter Zijlstra
2020-11-10 10:10 ` Jiri Olsa
2020-11-10 18:23 ` Jiri Olsa
2020-11-10 18:55 ` Arnaldo Carvalho de Melo
2020-11-11 15:54 ` Jiri Olsa
2020-11-13 4:29 ` Namhyung Kim
2020-11-13 11:01 ` Jiri Olsa
2020-11-09 21:53 ` [PATCH 04/24] tools headers uapi: Sync tools/include/uapi/linux/perf_event.h Jiri Olsa
2020-11-09 21:53 ` [PATCH 05/24] perf tools: Do not swap mmap2 fields in case it contains build id Jiri Olsa
2020-11-09 21:53 ` [PATCH 06/24] perf tools: Add build_id__is_defined function Jiri Olsa
2020-11-09 21:53 ` [PATCH 07/24] perf tools: Add filename__decompress function Jiri Olsa
2020-11-09 21:53 ` [PATCH 08/24] perf tools: Add support to read build id from compressed elf Jiri Olsa
2020-11-09 21:54 ` [PATCH 09/24] perf tools: Add check for existing link in buildid dir Jiri Olsa
2020-11-09 21:54 ` [PATCH 10/24] perf tools: Use struct extra_kernel_map in machine__process_kernel_mmap_event Jiri Olsa
2020-11-09 21:54 ` [PATCH 11/24] perf tools: Try to load vmlinux from buildid database Jiri Olsa
2020-11-09 21:54 ` [PATCH 12/24] perf tools: Store build id from mmap2 events Jiri Olsa
2020-11-09 21:54 ` [PATCH 13/24] perf tools: Allow mmap2 event to synthesize kernel image Jiri Olsa
2020-11-09 21:54 ` Jiri Olsa [this message]
2020-11-09 21:54 ` [PATCH 15/24] perf tools: Synthesize build id for kernel/modules/tasks Jiri Olsa
2020-11-13 4:32 ` Namhyung Kim
2020-11-13 11:10 ` Jiri Olsa
2020-11-09 21:54 ` [PATCH 16/24] perf tools: Add support to display build id for mmap2 events Jiri Olsa
2020-11-09 21:54 ` [PATCH 17/24] perf tools: Use machine__for_each_dso in perf_session__cache_build_ids Jiri Olsa
2020-11-09 21:54 ` [PATCH 18/24] perf tools: Add __perf_session__cache_build_ids function Jiri Olsa
2020-11-09 21:54 ` [PATCH 19/24] perf tools: Add is_perf_data function Jiri Olsa
2020-11-09 21:54 ` [PATCH 20/24] perf tools: Add build_id_cache__add function Jiri Olsa
2020-11-09 21:54 ` [PATCH 21/24] perf buildid-cache: Add support to add build ids from perf data Jiri Olsa
2020-11-09 21:54 ` [PATCH 22/24] perf buildid-cache: Add --debuginfod option Jiri Olsa
[not found] ` <CAP-5=fUDtTU2XYr6w6wYndP6RVFDLoJSnC31m+djA-r9EVMQiw@mail.gmail.com>
2020-11-23 22:26 ` Jiri Olsa
2020-11-09 21:54 ` [PATCH 23/24] perf buildid-list: Add support for mmap2's buildid events Jiri Olsa
2020-11-09 21:54 ` [PATCH 24/24] perf record: Add --buildid-mmap option to enable mmap's build id Jiri Olsa
2020-11-11 17:00 ` Andi Kleen
2020-11-12 11:57 ` Jiri Olsa
2020-11-12 20:39 ` Arnaldo Carvalho de Melo
2020-11-12 21:25 ` Jiri Olsa
2020-11-13 4:40 ` Namhyung Kim
2020-11-13 11:09 ` Jiri Olsa
2020-11-14 0:31 ` Namhyung Kim
2020-11-14 20:44 ` Jiri Olsa
2020-11-17 11:00 [PATCHv2 00/24] perf: Add mmap2 build id support Jiri Olsa
2020-11-17 11:00 ` [PATCH 14/24] perf tools: Allow mmap2 event to synthesize modules Jiri Olsa
2020-11-17 12:46 ` Arnaldo Carvalho de Melo
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