gh-112723: Call PyThreadState_Clear() from the correct interpreter
#112776
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…reter The `PyThreadState_Clear()` function must only be called with the GIL held and must be called from the same interpreter as the passed in thread state. Otherwise, any Python objects on the thread state may be destroyed using the wrong interpreter, leading to memory corruption. This is also important for `Py_GIL_DISABLED` builds because free lists will be associated with PyThreadStates and cleared in `PyThreadState_Clear()`. This fixes two places that called `PyThreadState_Clear()` from the wrong interpreter and adds an assertion to `PyThreadState_Clear()`.
carljm
reviewed
Dec 7, 2023
aisk
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to aisk/cpython
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Feb 11, 2024
…reter (python#112776) The `PyThreadState_Clear()` function must only be called with the GIL held and must be called from the same interpreter as the passed in thread state. Otherwise, any Python objects on the thread state may be destroyed using the wrong interpreter, leading to memory corruption. This is also important for `Py_GIL_DISABLED` builds because free lists will be associated with PyThreadStates and cleared in `PyThreadState_Clear()`. This fixes two places that called `PyThreadState_Clear()` from the wrong interpreter and adds an assertion to `PyThreadState_Clear()`.
Glyphack
pushed a commit
to Glyphack/cpython
that referenced
this pull request
Sep 2, 2024
…reter (python#112776) The `PyThreadState_Clear()` function must only be called with the GIL held and must be called from the same interpreter as the passed in thread state. Otherwise, any Python objects on the thread state may be destroyed using the wrong interpreter, leading to memory corruption. This is also important for `Py_GIL_DISABLED` builds because free lists will be associated with PyThreadStates and cleared in `PyThreadState_Clear()`. This fixes two places that called `PyThreadState_Clear()` from the wrong interpreter and adds an assertion to `PyThreadState_Clear()`.
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The
PyThreadState_Clear()function must only be called with the GIL held and must be called from the same interpreter as the passed in thread state. Otherwise, any Python objects on the thread state may be destroyed using the wrong interpreter, leading to memory corruption.This is also important for
Py_GIL_DISABLEDbuilds because object free lists will be associated with PyThreadStates and cleared inPyThreadState_Clear().This fixes two places that called
PyThreadState_Clear()from the wrong interpreter and adds an assertion toPyThreadState_Clear().The
new_interpreter()function required some refactoring so that no calls that may return errors happen between the creation of the thread state and the acquisition of the GIL.PyThreadState_Clear()should only be called from the same interpreter #112723