Test python interpreters without symbols in CI

[benfred]

The BSS scanning fallback code broke after python 3.10 was released (#716) and we didn't notice since this we don't test this functionality out in CI.

We should add some tests that exercise this functionality as part of CI

[zanieb]

To continue the discussion from #718,

❯ nm -A `uv python find --python-preference only-system`
/opt/homebrew/opt/[email protected]/bin/python3.12:                  U _Py_Initialize
/opt/homebrew/opt/[email protected]/bin/python3.12:                  U __NSGetExecutablePath
/opt/homebrew/opt/[email protected]/bin/python3.12:                  U ___error
/opt/homebrew/opt/[email protected]/bin/python3.12:                  U ___stderrp
/opt/homebrew/opt/[email protected]/bin/python3.12:                  U ___strlcat_chk
/opt/homebrew/opt/[email protected]/bin/python3.12: 0000000100000000 T __mh_execute_header
/opt/homebrew/opt/[email protected]/bin/python3.12:                  U _dladdr
/opt/homebrew/opt/[email protected]/bin/python3.12:                  U _environ
/opt/homebrew/opt/[email protected]/bin/python3.12:                  U _err
/opt/homebrew/opt/[email protected]/bin/python3.12:                  U _exit
/opt/homebrew/opt/[email protected]/bin/python3.12:                  U _fwrite
/opt/homebrew/opt/[email protected]/bin/python3.12:                  U _malloc
/opt/homebrew/opt/[email protected]/bin/python3.12:                  U _posix_spawn
/opt/homebrew/opt/[email protected]/bin/python3.12:                  U _posix_spawnattr_init
/opt/homebrew/opt/[email protected]/bin/python3.12:                  U _posix_spawnattr_setbinpref_np
/opt/homebrew/opt/[email protected]/bin/python3.12:                  U _posix_spawnattr_setflags
/opt/homebrew/opt/[email protected]/bin/python3.12:                  U _realpath$DARWIN_EXTSN
/opt/homebrew/opt/[email protected]/bin/python3.12:                  U _setenv
/opt/homebrew/opt/[email protected]/bin/python3.12:                  U _strcpy
/opt/homebrew/opt/[email protected]/bin/python3.12:                  U _strlen
/opt/homebrew/opt/[email protected]/bin/python3.12:                  U _strrchr
❯ uv python install 3.12
Searching for Python versions matching: Python 3.12
Installed Python 3.12.7 in 1.47s
 + cpython-3.12.7-macos-aarch64-none
❯ nm -A `uv python find --python-preference only-managed`
/Users/zb/.local/share/uv/python/cpython-3.12.7-macos-aarch64-none/bin/python3:                  U _Py_BytesMain
/Users/zb/.local/share/uv/python/cpython-3.12.7-macos-aarch64-none/bin/python3: 0000000100008008 d __dyld_private
/Users/zb/.local/share/uv/python/cpython-3.12.7-macos-aarch64-none/bin/python3: 0000000100000000 T __mh_execute_header
/Users/zb/.local/share/uv/python/cpython-3.12.7-macos-aarch64-none/bin/python3: 00000001000005f0 t _main
/Users/zb/.local/share/uv/python/cpython-3.12.7-macos-aarch64-none/bin/python3:                  U dyld_stub_binder

[benfred]

thanks @zanieb !

I just tested out uv quick for the first (and btw, uv is pretty slick on first impressions - I see why I've been hearing so much about it) - and I think that we're still seeing a _PyRuntime symbol , its just coming from the libpython.so rather than the main python executable (like python is compiled with --enabled-shared here).

[2024-11-02T00:02:50.323911966Z INFO  py_spy::python_process_info] Found libpython binary @ /home/ben/.local/share/uv/python/cpython-3.12.7-linux-x86_64-gnu/lib/libpython3.12.so.1.0
[2024-11-02T00:02:50.534690512Z INFO  py_spy::python_process_info] Getting version from python binary BSS
[2024-11-02T00:02:50.549518057Z INFO  py_spy::python_process_info] Failed to get version from BSS section: failed to find version string
[2024-11-02T00:02:50.549540505Z INFO  py_spy::python_process_info] Getting version from libpython BSS
[2024-11-02T00:02:50.551385878Z INFO  py_spy::version] Found matching version string '3.12.7 (main, Oct 16 2024, 04:37:19) [Clang 18.1.8 ]'
[2024-11-02T00:02:50.551398825Z INFO  py_spy::python_spy] python version 3.12.7 detected
[2024-11-02T00:02:50.551409353Z INFO  py_spy::python_process_info] got symbol _PyRuntime (0x00007ffab8ef2bd0) from libpython binary

[zanieb]

Alas. Well, good to know the distributions are compatible with a profiler even though we strip them, but too bad it's not helpful here :)

Why aren't the existing Windows tests sufficient if that's where it's usually broken?

(Glad to hear you liked uv!)