perf machine: Detect data vs. text mappings

Leverages the PERF_RECORD_MISC_MMAP_DATA bit in the RECORD_MMAP record
header. When the bit is set then the mapping type is set to
MAP__VARIABLE.

Signed-off-by: Stephane Eranian <eranian@google.com>
Cc: Andi Kleen <ak@linux.intel.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/1359040242-8269-17-git-send-email-eranian@google.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

diff --git a/tools/perf/util/machine.c b/tools/perf/util/machine.c
index d77ba86..b2ecad6 100644 (file)
--- a/tools/perf/util/machine.c
+++ b/tools/perf/util/machine.c
@@ -955,6 +955,7 @@ int machine__process_mmap_event(struct machine *machine, union perf_event *event
        u8 cpumode = event->header.misc & PERF_RECORD_MISC_CPUMODE_MASK;
        struct thread *thread;
        struct map *map;
+       enum map_type type;
        int ret = 0;
 
        if (dump_trace)
@@ -971,10 +972,17 @@ int machine__process_mmap_event(struct machine *machine, union perf_event *event
        thread = machine__findnew_thread(machine, event->mmap.pid);
        if (thread == NULL)
                goto out_problem;
+
+       if (event->header.misc & PERF_RECORD_MISC_MMAP_DATA)
+               type = MAP__VARIABLE;
+       else
+               type = MAP__FUNCTION;
+
        map = map__new(&machine->user_dsos, event->mmap.start,
                        event->mmap.len, event->mmap.pgoff,
                        event->mmap.pid, event->mmap.filename,
-                       MAP__FUNCTION);
+                       type);
+
        if (map == NULL)
                goto out_problem;