Date: Tue, 21 Mar 2006 10:40:19 -0800 From: John-Mark Gurney <gurney_j@resnet.uoregon.edu> To: current@FreeBSD.org Subject: core dumps are HUGE... Message-ID: <20060321184019.GX35129@funkthat.com>
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If someone wants to spend some time investigating this, this looks like
an interesting puzzle:
-bash-2.05b$ cat t.c
int main() { char *p = 0; *p = 5; return 0;}
-bash-2.05b$ cc -static -o t t.c
-bash-2.05b$ ./t
Segmentation fault (core dumped)
-bash-2.05b$ ls -l t t.core
-rwxr-xr-x 1 jmg jmg 179737 Mar 21 10:36 t
-rw------- 1 jmg jmg 50049024 Mar 21 10:36 t.core
I first read that as 5megs, but it turns out that it's 50megs in size!
A 50 meg core dump for a static program that does nothing? Though I
also have questsions about a 179k program file size for something that
doesn't call any functions...
Now the interesting part is that dynamicly linked:
-bash-2.05b$ cc -o t t.c
-bash-2.05b$ ./t
Segmentation fault (core dumped)
-bash-2.05b$ ls -l t t.core
-rwxr-xr-x 1 jmg jmg 4615 Mar 21 10:38 t
-rw------- 1 jmg jmg 303104 Mar 21 10:38 t.core
only 303k... Still on the hefty side of things for a program that
just cores, but better than static's 50megs...
--
John-Mark Gurney Voice: +1 415 225 5579
"All that I will do, has been done, All that I have, has not."
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