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>
parent
5a5e3d3c
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