two 4GB mallocs => SEGV
James R. Van Artsalen
james at jrv.org
Tue Oct 26 10:55:08 PDT 2004
David O'Brien wrote:
>malloc.c:map_pages() calls brk(2) and this is where it goes to la-la land.
The brk() kernel call is probably failing due to ulimit being exceeded
and not anything mysterious.
A few months ago I posted this bug in the libc brk(2) code - the stack
is not balanced if the kernel returns an error. I'm not running current
code at the moment but see if you brk.S has a stack issue at the err:
label. Stick in this pop if so and report if malloc(3c) then returns
NULL instead of crashing, then up your ulimit and try again and see if
all works without error.
--- lib/libc/amd64/sys/brk.S.~1~ Sat May 24 12:35:23 2003
+++ lib/libc/amd64/sys/brk.S Fri Apr 9 02:02:22 2004
@@ -78,6 +78,7 @@
+ popq %rdi
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