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Changelog

pystack 1.4.1 (2024-10-04)

Features

  • Improve our ability to debug Python 3.13 processes when the _Py_DebugOffsets cannot be located by accounting for a structure layout change in CPython 3.13.0rc3 (the reversion of the incremental cyclic garbage collector). (#213)

pystack 1.4.0 (2024-09-11)

Features

  • Add support for Python 3.13 (#186)
  • Add support for gzip compressed corefiles (#171)
  • Add a new --version command line flag to show the version of pystack (#203)
  • Support debugging free-threading (a.k.a. "nogil") Python 3.13 builds. Note that PyStack can't itself be run with python3.13t, it can only attach to a python3.13t process or core file from another interpreter. (#206)

Bug Fixes

  • Fix a bug that was causing Python scripts executed directly via shebang to report the shell script as the executable. (#184)
  • Heap corruption could cause PyStack to fail to generate a stack when --locals mode was used. This has been fixed by falling back to a reasonable default when attempting to format the repr of a local variable causes a dereference of an invalid pointer. (#194)
  • Fix a crash when analysing processes where the eval loop has a shim frame at the bottom of the stack (#204)

pystack 1.3.0 (2023-11-28)

Bug Fixes

  • Add a patch to the bundled elfutils used to create wheels to account for a bug when analysing cores with interleaved segments (#153)
  • Removed the unused --self flag. (#141)
  • Fix some instances when identifying the pthread id was failing in systems without GLIBC (#152)
  • Fix several some race conditions when stopping threads in multithreaded programs (#155)
  • Ensure log messages that contain non-UTF-8 data are not lost (#155)

pystack 1.2.0 (2023-07-31)

Features

  • Add support for Python 3.12 (#108)
  • Improve the performance of reading memory from running processes (#124)
  • Improve the performance of reading memory from core files (#126)

pystack 1.1.0 (2023-07-10)

Bug Fixes

  • Allow building with older elfutils than 0.188 when building with glibc (for musl libc we still need newer versions). (#40)
  • Improve error reporting when attaching to a process is forbidden. (#98)
  • Fix a crash that could occur under some unusual conditions if elfutils could not unwind the stack. (#101)
  • Drop a use of the f-string = specifier, which wasn't introduced until Python 3.8 (running PyStack with Python 3.7 was failing because of this). (#92)

pystack 1.0.1 (2023-04-11)

No significant changes.

pystack 1.0.0 (2023-04-06)

  • Initial release.