Re: kern/53590: DTrace fbt_getargdesc() fails with "Unknown function"

[Andreas Gustafsson <gson%gson.org@localhost>]

The following reply was made to PR kern/53590; it has been noted by GNATS.

From: Andreas Gustafsson <gson%gson.org@localhost>
To: Patrick Welche <prlw1%cam.ac.uk@localhost>
Cc: gnats-bugs%NetBSD.org@localhost
Subject: Re: kern/53590: DTrace fbt_getargdesc() fails with "Unknown function"
Date: Tue, 11 Sep 2018 17:50:35 +0300

 Patrick Welche wrote:
 >  I see:
 >  
 >  quark# modload dtrace_fbt
 >  quark#  dtrace -n 'fbt::vmem_alloc:entry { trace(args[0]); }'
 >  dtrace: description 'fbt::vmem_alloc:entry ' matched 1 probe
 >  CPU     ID                    FUNCTION:NAME
 >    1  20290                 vmem_alloc:entry       -2132062368
 >    1  20290                 vmem_alloc:entry       -2132060864
 >    1  20290                 vmem_alloc:entry       -2132062368
 >  ^C
 >  
 >  quark# uname -a
 >  NetBSD quark 8.99.25 NetBSD 8.99.25 (QUARK) #254: Mon Sep 10 11:38:46 BST 2018  prlw1@quark:/usr/src/sys/arch/amd64/compile/QUARK amd64
 
 Thank you, this is helpful.
 
 I see you are using a custom kernel.  How does it differ from GENERIC
 - for example, have you done something to enable debug symbols?
 -- 
 Andreas Gustafsson, gson%gson.org@localhost