Hi Magnus,

On 16 March 2016 at 01:37, Magnus Morton <m...@magnusmorton.com> wrote:
> You can recreate it in PyPy by putting the following two lines pretty much 
> anywhere in interpreter level code other than the 
> setup_after_space_initialization methods
>
> from pypy.module.pypyjit.hooks import pypy_hooks
> pypy_hooks.foo = “foo”
>
> What I can’t understand is what is special about the 
> setup_after_space_initialization methods that makes it work there.

Reproduced and figured it out.  Added some docs in eda9fd6a0601:

+    # WARNING: You should make a single prebuilt instance of a subclass
+    # of this class.  You can, before translation, initialize some
+    # attributes on this instance, and then read or change these
+    # attributes inside the methods of the subclass.  But this prebuilt
+    # instance *must not* be seen during the normal annotation/rtyping
+    # of the program!  A line like ``pypy_hooks.foo = ...`` must not
+    # appear inside your interpreter's RPython code.

In PyPy, setup_after_space_initialization() is not RPython (which means
it is executed before translation).


A bientôt,

Armin.
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