libbpf-tools: add string helpers, filter ksyms by regex #4964
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In this first form it adds an append-only vector-like array to store strings.
This will serve as a basis to create a C implementation of a functionality similar to what 'b.attach_kprobe(event_re=...)' offers in Python.
myhro
requested review from
drzaeus77,
goldshtn,
yonghong-song,
4ast,
brendangregg and
davemarchevsky
as code owners
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The goal is offer the basis of what is required, in terms of regex handling, to implement the C equivalent of what
b.attach_kprobe(event_re=...)does in Python. The first client that will be making use of it is a CO-RE port ofvfscount:This could also be useful to, for instance, add regex support to the
libbpf-tools/funclatencytool which is currently lacking this feature when compared to the Python version:bcc/libbpf-tools/funclatency.c
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