exclude static functions with prefix __SCT__ (#3772)

The kernel functions with prefix __SCT__ are for static calls. These static call functions are not in
/sys/kernel/debug/tracing/available_filter_functions and not in /sys/kernel/debug/kprobes/blacklist
either. Let us do filtering in get_kprobe_functions() to filter them out.

Co-authored-by: prameet.p <prameet.p@inba-prameet.p-210508>

diff --git a/src/python/bcc/__init__.py b/src/python/bcc/__init__.py
index ceb2884121db88028dab6f6a83da4623e007fa70..2ff5cf020470aa58b1bedc0b52f1bf8e4851644b 100644 (file)
--- a/src/python/bcc/__init__.py
+++ b/src/python/bcc/__init__.py
@@ -737,6 +737,10 @@ class BPF(object):
                 # non-attachable.
                 elif fn.startswith(b'__perf') or fn.startswith(b'perf_'):
                     continue
+                # Exclude all static functions with prefix __SCT__, they are
+                # all non-attachable
+                elif fn.startswith(b'__SCT__'):
+                    continue
                 # Exclude all gcc 8's extra .cold functions
                 elif re.match(b'^.*\.cold(\.\d+)?$', fn):
                     continue