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>

1 files changed, 15 insertions, 0 deletions

diff --git a/tools/perf/builtin-inject.c b/tools/perf/builtin-inject.c
index 9b336fdb6f71..423875c999b2 100644
--- a/tools/perf/builtin-inject.c
+++ b/tools/perf/builtin-inject.c
@@ -123,6 +123,19 @@ static int perf_event__repipe_mmap(struct perf_tool *tool,
         return err;
 }
 
+static int perf_event__repipe_mmap2(struct perf_tool *tool,
+                                   union perf_event *event,
+                                   struct perf_sample *sample,
+                                   struct machine *machine)
+{
+        int err;
+
+        err = perf_event__process_mmap2(tool, event, sample, machine);
+        perf_event__repipe(tool, event, sample, machine);
+
+        return err;
+}
+
 static int perf_event__repipe_fork(struct perf_tool *tool,
                                    union perf_event *event,
                                    struct perf_sample *sample,
@@ -339,6 +352,7 @@ static int __cmd_inject(struct perf_inject *inject)
 
         if (inject->build_ids || inject->sched_stat) {
                 inject->tool.mmap         = perf_event__repipe_mmap;
+                inject->tool.mmap2        = perf_event__repipe_mmap2;
                 inject->tool.fork         = perf_event__repipe_fork;
                 inject->tool.tracing_data = perf_event__repipe_tracing_data;
         }
@@ -390,6 +404,7 @@ int cmd_inject(int argc, const char **argv, const char *prefix __maybe_unused)
                 .tool = {
                         .sample         = perf_event__repipe_sample,
                         .mmap           = perf_event__repipe,
+                        .mmap2          = perf_event__repipe,
                         .comm           = perf_event__repipe,
                         .fork           = perf_event__repipe,
                         .exit           = perf_event__repipe,