perf symbols: Fill in pgoff in mmap synthesized events

When we synthesize mmap events we need to fill in the pgoff field.

I wasn't able to test this completely since I couldn't find an
executable region with a non 0 offset. We will see it when we start
doing data profiling.

Signed-off-by: Anton Blanchard <anton@samba.org>
Cc: David Miller <davem@davemloft.net>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Paul Mackerras <paulus@samba.org>
LKML-Reference: <20100403115331.GK5594@kryten>
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

1 files changed, 9 insertions, 0 deletions

diff --git a/tools/perf/util/event.c b/tools/perf/util/event.c
index 052eaeccc202..571fb25f7eb9 100644
--- a/tools/perf/util/event.c
+++ b/tools/perf/util/event.c
@@ -130,6 +130,7 @@ static int event__synthesize_mmap_events(pid_t pid, pid_t tgid,
                         continue;
                 pbf += n + 3;
                 if (*pbf == 'x') { /* vm_exec */
+                        u64 vm_pgoff;
                         char *execname = strchr(bf, '/');
 
                         /* Catch VDSO */
@@ -139,6 +140,14 @@ static int event__synthesize_mmap_events(pid_t pid, pid_t tgid,
                         if (execname == NULL)
                                 continue;
 
+                        pbf += 3;
+                        n = hex2u64(pbf, &vm_pgoff);
+                        /* pgoff is in bytes, not pages */
+                        if (n >= 0)
+                                ev.mmap.pgoff = vm_pgoff << getpagesize();
+                        else
+                                ev.mmap.pgoff = 0;
+
                         size = strlen(execname);
                         execname[size - 1] = '\0'; /* Remove \n */
                         memcpy(ev.mmap.filename, execname, size);