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| author |   Song Liu <songliubraving@fb.com> | 2018-10-01 22:36:36 -0700 |
|---|---|---|
| committer |   Steven Rostedt (VMware) <rostedt@goodmis.org> | 2018-10-10 22:14:17 -0400 |
| commit | a6ca88b241d5e929e6e60b12ad8cd288f0ffa256 (patch) | |
| tree | abb90d380a5c6e7ecd190b3a67745058b96fe564 /include/linux/trace_events.h | |
| parent | perf probe: Support SDT markers having reference counter (semaphore) (diff) | |
| download | linux-dev-a6ca88b241d5e929e6e60b12ad8cd288f0ffa256.tar.xz linux-dev-a6ca88b241d5e929e6e60b12ad8cd288f0ffa256.zip | |
trace_uprobe: support reference counter in fd-based uprobe
This patch enables uprobes with reference counter in fd-based uprobe.
Highest 32 bits of perf_event_attr.config is used to stored offset
of the reference count (semaphore).
Format information in /sys/bus/event_source/devices/uprobe/format/ is
updated to reflect this new feature.
Link: http://lkml.kernel.org/r/20181002053636.1896903-1-songliubraving@fb.com
Cc: Oleg Nesterov <oleg@redhat.com>
Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Reviewed-and-tested-by: Ravi Bangoria <ravi.bangoria@linux.ibm.com>
Signed-off-by: Song Liu <songliubraving@fb.com>
Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
Diffstat (limited to 'include/linux/trace_events.h')
| -rw-r--r-- | include/linux/trace_events.h | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/include/linux/trace_events.h b/include/linux/trace_events.h index 78a010e19ed4..4130a5497d40 100644 --- a/include/linux/trace_events.h +++ b/include/linux/trace_events.h @@ -575,7 +575,8 @@ extern int bpf_get_kprobe_info(const struct perf_event *event, bool perf_type_tracepoint); #endif #ifdef CONFIG_UPROBE_EVENTS -extern int perf_uprobe_init(struct perf_event *event, bool is_retprobe); +extern int perf_uprobe_init(struct perf_event *event, + unsigned long ref_ctr_offset, bool is_retprobe); extern void perf_uprobe_destroy(struct perf_event *event); extern int bpf_get_uprobe_info(const struct perf_event *event, u32 *fd_type, const char **filename, |