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Re: kern/53590: DTrace fbt_getargdesc() fails with "Unknown function"
The following reply was made to PR kern/53590; it has been noted by GNATS.
From: Andreas Gustafsson <gson%gson.org@localhost>
Cc: christos%zoulas.com@localhost (Christos Zoulas), Patrick Welche <prlw1%cam.ac.uk@localhost>
Subject: Re: kern/53590: DTrace fbt_getargdesc() fails with "Unknown function"
Date: Wed, 12 Sep 2018 19:17:35 +0300
Earlier, I wrote:
| However, if I manually build a kernel using "build.sh kernel.gdb=GENERIC",
| that not only builds a (huge) netbsd.gdb, but also overwrites the netbsd
| (without the .gdb suffix) from "build.sh release" with an only slightly
| larger one (27 megabytes instead of 26), and that one *does* include
| CTF function entries, 34956 of them, including one for vmem_alloc:
I did some further sleuthing. The part of "build.sh kernel.gdb=GENERIC"
that makes a difference is not the ".gdb", but the "kernel". In other
build.sh tools kernel=GENERIC
compiles each kernel object with "-g" and produces a kernel with CTF
function information, but
using the exact same sources compiles each kernel object without "-g"
and produces a kernel with no CTF function information.
Looks like something in the release build is overriding the
makeoptions DEBUG="-g" in GENERIC.
Andreas Gustafsson, gson%gson.org@localhost
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