Date: Mon, 4 Oct 2004 13:14:22 -0400 From: Brian Reichert <reichert@numachi.com> To: freebsd-current@freebsd.org Subject: awk leaking memory during arithmetic? Message-ID: <20041004171422.GK262@numachi.com>
next in thread | raw e-mail | index | archive | help
I may be misremembering some awk lore, but this still seems like
undesired behavior. Essentially, I'm trying to sum up some numbers,
but awk spin, chewing up memory, until it drops a huge core file.
# uname -a
FreeBSD backup.internal 5.2.1-RELEASE FreeBSD 5.2.1-RELEASE #1: Mon Sep 27
19:27:46 EDT 200 root@backup2.internal:/usr/src/sys/i386/compile/FILESERVER i386
# cat test_list | awk '{print $1}'
53999616
53999616
53311488
102475776
257134592
858624
512909312
1147392
39385174
35815424
# cat test_list | awk '{ t += $1 } END {print $t}'
awk in malloc(): error: allocation failed
Abort (core dumped)
# ls -l awk.core
-rw------- 1 root wheel 537698304 Oct 4 12:58 awk.core
Changing the awk program thusly:
cat test_list | awk '{ t += "$1" } END {print $t }'
Stops the malloc errors, but now prints nothing.
This same test on 4.10-RELEASE also doesn't do what I expect:
% cat test_list | awk '{ t += $1 } END {print $t}'
%
Just prints a blank line, with a zero exit status. Adding the quotes
as above, yeilds some bad math, which I presume is some overflow
error:
% cat test_list | awk '{ t += "$1" } END {print $t}'
35815424
I note that 5.2.1 and 4.10 are using different versions of awk.
Are these awk bugs, or am I misusing awk? The memory consumption
under 5.2.1 is what concerns me the most. I'll open a PR, if that's
the concensus. This sypmtom doesn't seem to correspond to any of
the (closed) PRs about awk...
--
Brian Reichert <reichert@numachi.com>
37 Crystal Ave. #303 Daytime number: (603) 434-6842
Derry NH 03038-1713 USA BSD admin/developer at large
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?20041004171422.GK262>