NetBSD Problem Report #55633

From www@netbsd.org  Mon Aug 31 17:27:27 2020
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Date: Mon, 31 Aug 2020 17:27:26 +0000 (UTC)
From: thorpej@me.com
Reply-To: thorpej@me.com
To: gnats-bugs@NetBSD.org
Subject: awk gets FPE_FLTDIV when building librump on an alpha builder
X-Send-Pr-Version: www-1.0

>Number:         55633
>Category:       port-alpha
>Synopsis:       awk gets FPE_FLTDIV when building librump on an alpha builder
>Confidential:   no
>Severity:       serious
>Priority:       medium
>Responsible:    thorpej
>State:          closed
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Mon Aug 31 17:30:00 +0000 2020
>Closed-Date:    Tue Sep 01 08:23:50 +0000 2020
>Last-Modified:  Tue Sep 01 08:23:50 +0000 2020
>Originator:     Jason Thorpe
>Release:        netbsd-current as of 31 Aug, 2020
>Organization:
RISCy Business
>Environment:
NetBSD/alpha running netbsd-9-stable userland and 9.99.71 kernel
>Description:
Host system is DS25 running a netbsd-9-stable userland and a netbsd-current kernel.  Standard netbsd-current build tools were build using build.sh.

When building librump, the awk script that supports rump symbol renaming encounters:

/home/thorpej/nbsd/tools/bin/nbawk: floating point exception: Floating point divide by zero
 input record number 38, file 
 source line number 1
/home/thorpej/nbsd/tools/bin/nbawk: floating point exception: Floating point divide by zero
 input record number 36, file 
 source line number 1
.
.
.

...which causes the symbol renaming to be incomplete, leading to subsequent rump-related build failures.

Substituting the host awk (netbsd-9-stable /usr/bin/awk) fixes the issue.
>How-To-Repeat:
Use build.sh to bootstrap the build tools on a NetBSD/alpha build host, and attempt to build librump.
>Fix:

>Release-Note:

>Audit-Trail:
From: Jason Thorpe <thorpej@me.com>
To: gnats-bugs@netbsd.org
Cc: 
Subject: Re: bin/55633: awk gets FPE_FLTDIV when building librump on an alpha
 builder
Date: Mon, 31 Aug 2020 11:26:10 -0700

 "cvs update -rnetbsd-9" in src/external/historical/nawk and rebuilding =
 host-tool "nbawk" fixes the problem, so it's a change in awk itself =
 that's causing the trouble.

 -- thorpej

From: Jason Thorpe <thorpej@me.com>
To: gnats-bugs@netbsd.org
Cc: 
Subject: Re: bin/55633: awk gets FPE_FLTDIV when building librump on an alpha
 builder
Date: Mon, 31 Aug 2020 15:49:48 -0700

 > On Aug 31, 2020, at 11:26 AM, Jason Thorpe <thorpej@me.com> wrote:
 >=20
 > "cvs update -rnetbsd-9" in src/external/historical/nawk and rebuilding =
 host-tool "nbawk" fixes the problem, so it's a change in awk itself =
 that's causing the trouble.

 The FPE occurs in is_number(), which is called with the argument =
 "nanotime".  The "r =3D=3D HUGE_VAL" comparison generates the SIGFFPE.

 -- thorpej

Responsible-Changed-From-To: bin-bug-people->thorpej
Responsible-Changed-By: thorpej@NetBSD.org
Responsible-Changed-When: Tue, 01 Sep 2020 08:23:50 +0000
Responsible-Changed-Why:
Take.


State-Changed-From-To: open->closed
State-Changed-By: thorpej@NetBSD.org
State-Changed-When: Tue, 01 Sep 2020 08:23:50 +0000
State-Changed-Why:


>Unformatted:

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