cannot attach uprobe, probe entry may not exist error for ustat running inside container.

cannot attach uprobe, probe entry may not exist
Traceback (most recent call last):
File "/usr/share/bcc/tools/lib/ustat", line 307, in
Tool().run()
File "/usr/share/bcc/tools/lib/ustat", line 299, in run
self._loop_iter()
File "/usr/share/bcc/tools/lib/ustat", line 248, in _loop_iter
self._attach_probes()
File "/usr/share/bcc/tools/lib/ustat", line 239, in _attach_probes
self.bpf.attach_uprobe(name=path, fn_name=func, addr=addr, pid=-1)
File "/usr/lib/python2.7/dist-packages/bcc/__init__.py", line 1019, in attach_uprobe
raise Exception("Failed to attach BPF to uprobe")
Exception: Failed to attach BPF to uprobe

no issues running ustat on vm. anything missing for container to work ?