Re: "TLS exhausted"; need help interpreting output from DUMP-THREAD

On Thu, Mar 13, 2025 at 2:40 PM Douglas Katzman <[email protected]> wrote:

> Basically it's running out of thread-local slots for special variables that have been specially and thread-locally LET-bound.

Is there a way to LET-bind a special variable in some way other than
thread-locally?

> SBCL has a hard limit on that number, and the default is only 4k. Furthermore it has an unfortunate aspect of permanently consuming a thread-local slot for any symbol that has ever been thread-locally bound even if the symbol became garbage.

I'm interested in identifying which are the special variables which
are using up the thread-local slots, in hope of identifying a
workaround (i.e. reworking the code to create fewer of the offending
symbols). Is there a way to know what are the symbols which have been
allocated thread-local slots?

Thanks for your help,

Robert


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