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| author |   KUMANO Syuhei <kumano.prog@gmail.com> | 2010-08-15 15:18:04 +0900 |
|---|---|---|
| committer |   Ingo Molnar <mingo@elte.hu> | 2010-08-19 12:49:56 +0200 |
| commit | 737480a0d525dae13306296da08029dff545bc72 (patch) | |
| tree | e769b99529b60a55b6a9ef80bf38c8f1937cf3cc /samples/kfifo | |
| parent | Merge branch 'perf/urgent' of git://git.kernel.org/pub/scm/linux/kernel/git/acme/linux-2.6 into perf/urgent (diff) | |
| download | linux-dev-737480a0d525dae13306296da08029dff545bc72.tar.xz linux-dev-737480a0d525dae13306296da08029dff545bc72.zip | |
kprobes/x86: Fix the return address of multiple kretprobes
Fix the return address of subsequent kretprobes when multiple
kretprobes are set on the same function.
For example:
# cd /sys/kernel/debug/tracing
# echo "r:event1 sys_symlink" > kprobe_events
# echo "r:event2 sys_symlink" >> kprobe_events
# echo 1 > events/kprobes/enable
# ln -s /tmp/foo /tmp/bar
(without this patch)
# cat trace
ln-897 [000] 20404.133727: event1: (kretprobe_trampoline+0x0/0x4c <- sys_symlink)
ln-897 [000] 20404.133747: event2: (system_call_fastpath+0x16/0x1b <- sys_symlink)
(with this patch)
# cat trace
ln-740 [000] 13799.491076: event1: (system_call_fastpath+0x16/0x1b <- sys_symlink)
ln-740 [000] 13799.491096: event2: (system_call_fastpath+0x16/0x1b <- sys_symlink)
Signed-off-by: KUMANO Syuhei <kumano.prog@gmail.com>
Reviewed-by: Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Ananth N Mavinakayanahalli <ananth@in.ibm.com>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: YOSHIFUJI Hideaki <yoshfuji@linux-ipv6.org>
LKML-Reference: <1281853084.3254.11.camel@camp10-laptop>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'samples/kfifo')
0 files changed, 0 insertions, 0 deletions