Changelog¶

pystack 1.4.1 (2024-10-04)¶

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)

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)

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)

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)

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)

No significant changes.