Message310191
In one of patches I'm building, (yet another attempt at caching LOAD_GLOBALS)[1], I'm using the private APIs from PEP 523 to store an array with every code object. I'm calling _PyEval_RequestCodeExtraIndex with PyMem_Free for the freefunc argument. While running the cpython testsuite, I found that test_embed case crashes with a segfault. The gdb backtrace[2] seems to indicate that PyInterpreterState::co_extra_freefuncs is uninitialized, while it should be a pointer to the PyMem_Free function.
One way to work around this is to set the array as a member on the PyCodeObject struct and use it directly. And I've verified that it works. Am I using the PEP 523 private api correctly? Also, on Linux, this consistently crashes while on OSX, it occasionally doesn't crash which makes me wonder if it's some kind of a race condition involving Sub-interpreters. The attached gist[2] has steps for repro.
[1]: https://github.com/python/cpython/compare/master...jeethu:py3.7_load_global_cache
[2]: https://gist.github.com/jeethu/6d92185ca97dd692e7fadcd105e0ef70 |
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Date |
User |
Action |
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2018-01-17 15:35:04 | jeethu | set | recipients:
+ jeethu |
2018-01-17 15:35:04 | jeethu | set | messageid: <1516203304.77.0.467229070634.issue32584@psf.upfronthosting.co.za> |
2018-01-17 15:35:04 | jeethu | link | issue32584 messages |
2018-01-17 15:35:04 | jeethu | create | |
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