Mark Atkinson wrote:
I updated my kernel/world yesterday and thunderbird 3.0.2 started core
dumping after I completed the upgrade. It continued to do so on
previously good operations after a full re-compile.
I noticed that some jemalloc changes went in and was wondering if anyone
else was noticing SEGV problems in other apps with malloc_usable_size()
or ARENA problems in threaded apps?
(gdb) bt
#0 0x28eacb14 in malloc_usable_size () from /lib/libc.so.7
#1 0x28eadbaa in free () from /lib/libc.so.7
#2 0x2ed9ac22 in gss_release_buffer () from /usr/lib/libgssapi.so.10
This failure (segfault due to accessing an unmapped region of memory) is
more subtle than I would typically expect of a malloc bug. My approach
to debugging this would be to turn on tracing (see MALLOC_OPTIONS=U
docs) and see if the pointer passed to free() was valid (i.e. returned
by malloc/calloc/realloc, but not yet freed).
Jason
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