Messages in this thread | | | Date | Mon, 21 Nov 2022 15:16:54 +0100 | From | Peter Zijlstra <> | Subject | Re: [RFC 0/1] BPF tracing for arm64 using fprobe |
| |
On Mon, Nov 21, 2022 at 02:47:10PM +0100, KP Singh wrote:
> > > How do I know that a function return was modified by BPF? If I'm debugging > > You can list the BPF programs that are loaded in the kernel with > > # bpftool prog list
Only when you have access to the machine; most cases it's people sending random splats by email.
> Also, the BPF programs show up in call stacks when you are debugging.
Only when it splats inside the BPF part, not when it splats after because BPF changed semantics of a function.
| |