I'm finding more SBCL threading bugs: so far, the count is three bugs#

Fri, 16 Jul 2004 01:12:31 +0000

I'm finding more SBCL threading bugs: so far, the count is three bugs and two fixes.

Edi Weitz pointed out recently that his cl-ppcre libarry comes with a test suite whose threading tests fail when run under SBCL, so I've been working on that. So far

1. Bad header file ordering in the runtime was causing the non-threaded versions of spinlock get/release inline functions to be compiled in some places even on a threaded build. (Fixed)

2. SIGCHLD will call destroythread, which is fair enough, but not if you're holding allthreads_lock already because it wants to acquire it. (Fixed)

3. After beating on the threading for long enough it's still somehow possible to get into a state where GC wants to stop a thread so that it can collect the heap, but the thread has disappeared. Not fixed