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Merged
iritkatriel merged 9 commits into from
Oct 17, 2023
Merged

gh-107457: update dis documentation with changes in 3.12 #108900

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34250f3
doc: describe how CACHE opcodes are taken into account in jumps
MatthieuDartiailh Sep 4, 2023
e7d9021
doc: document MIN_INSTRUMENTED_OPCODE in dis
MatthieuDartiailh Sep 4, 2023
0586fec
doc: document END_SEND and fix SEND documentation
MatthieuDartiailh Sep 4, 2023
7617456
Doc: clarify CALL_INSTRINSIC_2 stack effect
MatthieuDartiailh Sep 5, 2023
6ad38e3
doc: clarify the stack manipulation of LOAD_SUPER_ATTR
MatthieuDartiailh Sep 5, 2023
3644200
Apply suggestions from code review
MatthieuDartiailh Sep 25, 2023
0a1dee2
Update dis.rst
MatthieuDartiailh Sep 28, 2023
5a93f49
docs: address review comments
MatthieuDartiailh Oct 17, 2023
4291f95
Merge branch 'main' into dis-docs
iritkatriel Oct 17, 2023
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doc: clarify the stack manipulation of LOAD_SUPER_ATTR
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@MatthieuDartiailh
MatthieuDartiailh committed Sep 5, 2023
commit 6ad38e3cdc4c591c5e9c2c669777315bdc88d77d
20 changes: 13 additions & 7 deletions Doc/library/dis.rst
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Expand Up @@ -1151,15 +1151,21 @@ iterations of the loop.

.. opcode:: LOAD_SUPER_ATTR (namei)

This opcode implements :func:`super` (e.g. ``super().method()`` and
``super().attr``). It works the same as :opcode:`LOAD_ATTR`, except that
``namei`` is shifted left by 2 bits instead of 1, and instead of expecting a
single receiver on the stack, it expects three objects (from top of stack
down): ``self`` (the first argument to the current method), ``cls`` (the
class within which the current method was defined), and the global ``super``.
This opcode implements :func:`super` both in its 0 argument form and in its
2 arguments form (e.g. ``super().method()``, ``super().attr`` and
``super(cls, self).method()``, ``super(cls, self).attr``).

It pops three values from the stack (from top of stack down):
- ``self``: the first argument to the current method
- ``cls``: the class within which the current method was defined)
- the global ``super``

With respect to its argument, it works similarly to :opcode:`LOAD_ATTR`,
except that ``namei`` is shifted left by 2 bits instead of 1.

The low bit of ``namei`` signals to attempt a method load, as with
:opcode:`LOAD_ATTR`.
:opcode:`LOAD_ATTR` which results in pushing ``None`` and the loaded method.
When it is unset a single value is pushed to the stack.

The second-low bit of ``namei``, if set, means that this was a two-argument
call to :func:`super` (unset means zero-argument).
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