Commits on Jul 19, 2022

1. btf: allow passing *Type to Spec.TypeByName

   

   lmb committed Jul 19, 2022
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2. btf: make HandleIterator own the Handle …

   Add HandleIterator.Handle instead of taking **Handle in Next(). This
   allows adding a Take() function which makes it clearer how ownership
   is handled in code using HandleIterator.

   

   lmb committed Jul 19, 2022
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3. btf: add FindHandle …

   Add a helper that iterates all BTF objects in the kernel and returns
   the first one for which a user supplied callback returns true.

   

   lmb committed Jul 19, 2022
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4. program: support tracing of kernel modules …

   Allow tracing functions in kernel modules via fentry, fexit, fmod_ret
   and tp_btf programs. The behaviour follows libbpf and is transparent
   to the user: if we can't find a target in vmlinux we attempt to find
   it in any loaded kernel module.
   
   Refactor TestProgramTypeLSM to test attaching via BTF. This removes
   LSM tests for BPF_F_SLEEPABLE, since they don't excercise library
   behaviour beyond passing ProgramSpec.Flags to the kernel.
   
   Updates cilium#705

   

   lmb committed Jul 19, 2022
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