Date: Thu, 23 Aug 2018 15:53:25 +0000 From: bugzilla-noreply@freebsd.org To: bugs@FreeBSD.org Subject: [Bug 230846] dtrace FBT doesn't know about ifuncs Message-ID: <bug-230846-227@https.bugs.freebsd.org/bugzilla/>
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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D230846 Bug ID: 230846 Summary: dtrace FBT doesn't know about ifuncs Product: Base System Version: CURRENT Hardware: Any OS: Any Status: New Severity: Affects Many People Priority: --- Component: kern Assignee: bugs@FreeBSD.org Reporter: markj@FreeBSD.org FBT creates entry/return probes for functions which have a corresponding ELF symbol. For e.g., copyout(), we'll get fbt::copyout{,_smap,_nosmap}:entry.= =20 Now users need to know which one to select. In particular, fbt::copyout:en= try never fires now. I think FBT should be made to treat STT_GNU_IFUNC symbols specially: when enabling a probe on such a function, invoke the resolver to find the true address, and put a probe there instead. --=20 You are receiving this mail because: You are the assignee for the bug.=
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