gh-116098: Clean up frame allocation code and remove the invalid sneaky frame test#116687
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brandtbucher approved these changes Mar 12, 2024
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brandtbucher added tests 
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brandtbucher commented Mar 12, 2024
Probably not worth backporting. |
vstinner pushed a commit to vstinner/cpython that referenced this pull request Mar 20, 2024
adorilson pushed a commit to adorilson/cpython that referenced this pull request Mar 25, 2024
diegorusso pushed a commit to diegorusso/cpython that referenced this pull request Apr 17, 2024
andersk reviewed Sep 18, 2024
| // Just pretend that we have an owned, cleared frame so frame_dealloc | ||
| // doesn't make the situation worse: | ||
| f->f_frame= (_PyInterpreterFrame*)f->_f_frame_data; | ||
| f->f_frame->owner=FRAME_CLEARED; |
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We should also remove the corresponding assert(frame->owner != FRAME_CLEARED) statements, especially since FRAME_CLEARED was never a valid member of enum _frameowner (it’s from enum _framestate).
colesbury pushed a commit that referenced this pull request Jan 2, 2025
GH-124148) The `owner` field of `_PyInterpreterFrame` is supposed to be a member of `enum _frameowner`, but `FRAME_CLEARED` is a member of `enum _framestate`. At present, it happens that `FRAME_CLEARED` is not numerically equal to any member of `enum _frameowner`, but that could change in the future. The code that incorrectly assigned `owner = FRAME_CLEARED` was deleted in commit a53cc3f (GH-116687). Remove the incorrect checks for `owner != FRAME_CLEARED` as well.
srinivasreddy pushed a commit to srinivasreddy/cpython that referenced this pull request Jan 8, 2025
pythonGH-124148) The `owner` field of `_PyInterpreterFrame` is supposed to be a member of `enum _frameowner`, but `FRAME_CLEARED` is a member of `enum _framestate`. At present, it happens that `FRAME_CLEARED` is not numerically equal to any member of `enum _frameowner`, but that could change in the future. The code that incorrectly assigned `owner = FRAME_CLEARED` was deleted in commit a53cc3f (pythonGH-116687). Remove the incorrect checks for `owner != FRAME_CLEARED` as well.
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After a discussion with @brandtbucher , we believe the test is not testing what it's supposed to anymore. No new frame is created during the frame allocation and the test lost its meaning. Under no circumstance this test is valid or checking something reasonable. So we should just remove this test.
The fundamental reason the test is invalid is that the current frame allocation code is immune from being interrupted by Python code that can somehow create the same frame object. So we also remove the dead code in frame allocation, and replace it with an assert and some comments.
There's no user observable behavior changes so I'll skip the news, unless someone disagrees.
test_framefails when running with-R 3:3argument #116098