tree 1f1eb651d53a55603cae731fd350b534f6ae87df
parent 762fb3ec8e05ca7a61b28e8a876c194c9db591ef
author Willy Tarreau <w@1wt.eu> 1583251748 +0100
committer Willy Tarreau <w@1wt.eu> 1583255920 +0100
encoding latin1

MINOR: tools: add resolve_sym_name() to resolve function pointers

We use various hacks at a few places to try to identify known function
pointers in debugging outputs (show threads & show fd). Let's centralize
this into a new function dedicated to this. It already knows about the
functions matched by "show threads" and "show fd", and when built with
USE_DL, it can rely on dladdr1() to resolve other functions. There are
some limitations, as static functions are not resolved, linking with
-rdynamic is mandatory, and even then some functions will not necessarily
appear. It's possible to do a better job by rebuilding the whole symbol
table from the ELF headers in memory but it's less portable and the gains
are still limited, so this solution remains a reasonable tradeoff.