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| author | Dave Martin <dave.martin@linaro.org> | 2010-08-03 12:48:35 +0100 |
|---|---|---|
| committer | Arnaldo Carvalho de Melo <acme@redhat.com> | 2010-08-04 12:41:23 -0300 |
| commit | b5a6325464b700c4bdac8799c495970516eed41c (patch) | |
| tree | 430502df6156e57c042968978f2921731d5ce479 /tools | |
| parent | 12a81c8df13c60904febcafcf6b90ca1acb67122 (diff) | |
| download | op-kernel-dev-b5a6325464b700c4bdac8799c495970516eed41c.zip op-kernel-dev-b5a6325464b700c4bdac8799c495970516eed41c.tar.gz | |
perf events: Fix mmap offset determination
Fix buggy-looking code which unnecessarily adjusts the file offset
fields read from /proc/*/maps.
This may have gone unnoticed since the offset is usually 0 (and the
logic in util/symbol.c may work incorrectly for other offset values).
Commiter note:
This fixes a bug introduced in 4af8b35, there is no need to shift pgoff
twice, the show_map_vma routine in fs/proc/task_mmu.c already converts
it from the number of pages to the size in bytes, and that is what
appears in /proc/PID/map.
Cc: Nicolas Pitre <nicolas.pitre@linaro.org>
Cc: Will Deacon <Will.Deacon@arm.com>
LKML-Reference: <1280836116-6654-2-git-send-email-dave.martin@linaro.org>
Signed-off-by: Dave Martin <dave.martin@linaro.org>
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Diffstat (limited to 'tools')
| -rw-r--r-- | tools/perf/util/event.c | 8 |
1 files changed, 1 insertions, 7 deletions
diff --git a/tools/perf/util/event.c b/tools/perf/util/event.c index 6b0db55..db8a1d4 100644 --- a/tools/perf/util/event.c +++ b/tools/perf/util/event.c @@ -151,7 +151,6 @@ 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 */ @@ -162,12 +161,7 @@ static int event__synthesize_mmap_events(pid_t pid, pid_t tgid, 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; + n = hex2u64(pbf, &ev.mmap.pgoff); size = strlen(execname); execname[size - 1] = '\0'; /* Remove \n */ |
