On Sun, Aug 4, 2013 at 8:54 PM, Andres Freund <and...@2ndquadrant.com> wrote: >> AFAIK you've got it backwards: ASLR is something that happens >> automatically, unless you take steps to suppress it, at least on MacOS >> X. I not long ago built with EXEC_BACKEND on that platform and found >> that it broke stuff until I disabled ASLR. > > ALSR for code can only happen if code is built as position independent > code, otherwise addresses are hardcoded. That is - in modern unixoid > systems - nearly always the case for shared libraries et al, but not > necessarily for plain binaries or statically linked code. The above > referenced -fPIC and -pie make the code/executable position independent.
Ah, for code, yeah, I suppose that would be true. In the case I mentioned though, though, it definitely seemed that other things were moving around each time through, particularly the stack. -- Robert Haas EnterpriseDB: http://www.enterprisedb.com The Enterprise PostgreSQL Company -- Sent via pgsql-hackers mailing list (pgsql-hackers@postgresql.org) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-hackers
