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>

diff --git a/tools/perf/util/event.c b/tools/perf/util/event.c
index 052eaec..571fb25 100644 (file)
--- 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);