diff options
author | 2020-12-14 11:54:52 +0100 | |
---|---|---|
committer | 2020-12-28 10:25:33 -0300 | |
commit | 4183a8d70a288627219942f84e1f83fd28717de3 (patch) | |
tree | ba1c1509fb9a0dc68ce7e5c3e31f7e6fdded4a44 /tools/perf/util/synthetic-events.c | |
parent | perf tools: Allow using PERF_RECORD_MMAP2 to synthesize the kernel modules maps (diff) | |
download | linux-4183a8d70a288627219942f84e1f83fd28717de3.tar.gz linux-4183a8d70a288627219942f84e1f83fd28717de3.tar.bz2 linux-4183a8d70a288627219942f84e1f83fd28717de3.zip |
perf tools: Allow synthesizing the build id for kernel/modules/tasks in PERF_RECORD_MMAP2
Adding build id to synthesized mmap2 events for everything -
kernel/modules/tasks, when symbol_conf.buildid_mmap2 is true.
Signed-off-by: Jiri Olsa <jolsa@kernel.org>
Acked-by: Namhyung Kim <namhyung@kernel.org>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Alexei Budankov <abudankov@huawei.com>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Ian Rogers <irogers@google.com>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Michael Petlan <mpetlan@redhat.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Song Liu <songliubraving@fb.com>
Cc: Stephane Eranian <eranian@google.com>
Link: http://lore.kernel.org/lkml/20201214105457.543111-11-jolsa@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Diffstat (limited to 'tools/perf/util/synthetic-events.c')
-rw-r--r-- | tools/perf/util/synthetic-events.c | 32 |
1 files changed, 32 insertions, 0 deletions
diff --git a/tools/perf/util/synthetic-events.c b/tools/perf/util/synthetic-events.c index 126446de7bdd..69688f20db11 100644 --- a/tools/perf/util/synthetic-events.c +++ b/tools/perf/util/synthetic-events.c @@ -347,6 +347,31 @@ static bool read_proc_maps_line(struct io *io, __u64 *start, __u64 *end, } } +static void perf_record_mmap2__read_build_id(struct perf_record_mmap2 *event, + bool is_kernel) +{ + struct build_id bid; + int rc; + + if (is_kernel) + rc = sysfs__read_build_id("/sys/kernel/notes", &bid); + else + rc = filename__read_build_id(event->filename, &bid) > 0 ? 0 : -1; + + if (rc == 0) { + memcpy(event->build_id, bid.data, sizeof(bid.data)); + event->build_id_size = (u8) bid.size; + event->header.misc |= PERF_RECORD_MISC_MMAP_BUILD_ID; + event->__reserved_1 = 0; + event->__reserved_2 = 0; + } else { + if (event->filename[0] == '/') { + pr_debug2("Failed to read build ID for %s\n", + event->filename); + } + } +} + int perf_event__synthesize_mmap_events(struct perf_tool *tool, union perf_event *event, pid_t pid, pid_t tgid, @@ -453,6 +478,9 @@ out: event->mmap2.pid = tgid; event->mmap2.tid = pid; + if (symbol_conf.buildid_mmap2) + perf_record_mmap2__read_build_id(&event->mmap2, false); + if (perf_tool__process_synth_event(tool, event, machine, process) != 0) { rc = -1; break; @@ -633,6 +661,8 @@ int perf_event__synthesize_modules(struct perf_tool *tool, perf_event__handler_t memcpy(event->mmap2.filename, pos->dso->long_name, pos->dso->long_name_len + 1); + + perf_record_mmap2__read_build_id(&event->mmap2, false); } else { size = PERF_ALIGN(pos->dso->long_name_len + 1, sizeof(u64)); event->mmap.header.type = PERF_RECORD_MMAP; @@ -1053,6 +1083,8 @@ static int __perf_event__synthesize_kernel_mmap(struct perf_tool *tool, event->mmap2.start = map->start; event->mmap2.len = map->end - event->mmap.start; event->mmap2.pid = machine->pid; + + perf_record_mmap2__read_build_id(&event->mmap2, true); } else { size = snprintf(event->mmap.filename, sizeof(event->mmap.filename), "%s%s", machine->mmap_name, kmap->ref_reloc_sym->name) + 1; |