[Python-Dev] What is the purpose of the _PyThreadState_Current symbol in Python 3? (original) (raw)

Gabriele phoenix1987 at gmail.com
Sat Sep 29 12:14:22 EDT 2018

Ah ok, this might be related to Victor's observation based on the latest sources. I haven't tested 3.7 yet, but if _PyRuntime is available from dynsym then this is already enough.

Thanks, Gabriele On Sat, 29 Sep 2018 at 11:00, Nathaniel Smith <njs at pobox.com> wrote:

On Fri, Sep 28, 2018 at 3:29 PM, Gabriele <phoenix1987 at gmail.com> wrote: > On Fri, 28 Sep 2018 at 23:12, Nathaniel Smith <njs at pobox.com> wrote: >> What information do you wish the interpreter provided, that would make your program simpler and more reliable? > > An exported global variable that points to the head of the > PyInterpreterState linked list (i.e. the return value of > PyInterpreterStateHead). This way my program could just look this up > from the dynsym section instead of scanning a dump of the bss section > in memory to find a possible candidate. Hmm, it looks like in 3.7+, PyRuntime is marked PyAPIDATA, which I think should make it exported from dynsym? https://github.com/python/cpython/blob/4b430e5f6954ef4b248e95bfb4087635dcdefc6d/Include/internal/pystate.h#L206 And PyInterpreterStateHead is just PyRuntime.interpreters.head. So maybe this is already done... -n -- Nathaniel J. Smith -- https://vorpus.org

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