perf tools: Add attr->mmap2 support
This patch adds support for the new PERF_RECORD_MMAP2 record type
exposed by the kernel. This is an extended PERF_RECORD_MMAP record.
It adds for each file-backed mapping the device major, minor number and
the inode number and generation.
This triplet uniquely identifies the source of a file-backed mapping. It
can be used to detect identical virtual mappings between processes, for
instance.
The patch will prefer MMAP2 over MMAP.
Signed-off-by: Stephane Eranian <eranian@google.com>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Namhyung Kim <namhyung.kim@lge.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/r/1377079825-19057-3-git-send-email-eranian@google.com
[ Cope with 314add6 "Change machine__findnew_thread() to set thread pid",
fix 'perf test' regression test entry affected,
use perf_missing_features.mmap2 to fallback to not using .mmap2 in older kernels,
so that new tools can work with kernels where this feature is not present ]
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
diff --git a/tools/perf/util/session.c b/tools/perf/util/session.c
index 0308d9e..51f5edf 100644
--- a/tools/perf/util/session.c
+++ b/tools/perf/util/session.c
@@ -351,6 +351,25 @@
}
}
+static void perf_event__mmap2_swap(union perf_event *event,
+ bool sample_id_all)
+{
+ event->mmap2.pid = bswap_32(event->mmap2.pid);
+ event->mmap2.tid = bswap_32(event->mmap2.tid);
+ 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);
+
+ if (sample_id_all) {
+ void *data = &event->mmap2.filename;
+
+ data += PERF_ALIGN(strlen(data) + 1, sizeof(u64));
+ swap_sample_id_all(event, data);
+ }
+}
static void perf_event__task_swap(union perf_event *event, bool sample_id_all)
{
event->fork.pid = bswap_32(event->fork.pid);
@@ -455,6 +474,7 @@
static perf_event__swap_op perf_event__swap_ops[] = {
[PERF_RECORD_MMAP] = perf_event__mmap_swap,
+ [PERF_RECORD_MMAP2] = perf_event__mmap2_swap,
[PERF_RECORD_COMM] = perf_event__comm_swap,
[PERF_RECORD_FORK] = perf_event__task_swap,
[PERF_RECORD_EXIT] = perf_event__task_swap,
@@ -851,7 +871,8 @@
(cpumode == PERF_RECORD_MISC_GUEST_USER))) {
u32 pid;
- if (event->header.type == PERF_RECORD_MMAP)
+ if (event->header.type == PERF_RECORD_MMAP
+ || event->header.type == PERF_RECORD_MMAP2)
pid = event->mmap.pid;
else
pid = sample->pid;
@@ -978,6 +999,8 @@
sample, evsel, machine);
case PERF_RECORD_MMAP:
return tool->mmap(tool, event, sample, machine);
+ case PERF_RECORD_MMAP2:
+ return tool->mmap2(tool, event, sample, machine);
case PERF_RECORD_COMM:
return tool->comm(tool, event, sample, machine);
case PERF_RECORD_FORK: