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SubjectRe: Getting empty callchain from perf_callchain_kernel()
On Fri, May 17, 2019 at 04:15:39PM +0800, Kairui Song wrote:
> Hi, I think the actual problem is that bpf_get_stackid_tp (and maybe
> some other bfp functions) is now broken, or, strating an unwind
> directly inside a bpf program will end up strangely. It have following
> kernel message:

Urgh, what is that bpf_get_stackid_tp() doing to get the regs? I can't
follow.

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