Neil Toronto wrote on 01/17/2015 07:57 PM:
Ubuntu has had ASLR enabled by default since 10.04 (about five years).
During that time, in my experience, it's never affected Racket.
I do have to use "setarch i686 -R" to disable ASLR to run Maxima,
which is written in Common Lisp. So it's a problem for some GC'd
runtimes, but apparently not our favorite one. :D
You could be right; I'm fuzzy on this, due to one experience. A few
years ago, one of my clients ran into a problem with long-running Racket
server processes on Ubuntu that (in native stack trace) looked like
ASLR. Problem disappeared once ASLR was disabled. They were probably
still using the `cgc` (not `3m`) collector at that time, and it was
probably around the time they migrated to Ubuntu Server 10.04.
(Then again, they might've still had some C extensions in their Racket
app at that time, so all bets are off. The C code quality was good, as
C code quality goes, but still. I eventually replaced all the C code in
that app with pure Racket and external native processes, for various
other reasons. A lot of uncontrolled variables here, but I recall no
problems like the ones we thought were ASLR, since we disabled ASLR. If
it turns out that ASLR is a problem, it's a bad enough and
hard-to-diagnose problem that everyone putting apps into production
needs to know about it.)
Neil ⋀
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