gh-109094: replace frame->prev_instr by frame->instr_ptr

[iritkatriel]

• Issue: Replace frame->prev_instr by frame->instr_ptr #109094

[gvanrossum]

For me, the only thing that prevent this from being merged is the failing gdb test. Maybe you can get help on Discord? Mark should still review it one more time.

[gvanrossum]

(When you turn on uops all the time there are some additional failures in test_embed, but those are also on main; it's the thing Brandt reported. I'm looking into a shorter repro.)

[iritkatriel]

For me, the only thing that prevent this from being merged is the failing gdb test. Maybe you can get help on Discord? Mark should still review it one more time.

I'll look into the gdb tests tomorrow.

[iritkatriel]

I have made the requested changes; please review again.

[markshannon]

A few minor comments and questions, but looks good overall.

[markshannon]

All test except test_embed pass with export PYTHONUOPS=1
The test_embed failure looks like the same as on main.

[iritkatriel]

I have made the requested changes; please review again.

[markshannon]

Looks good. A definite improvement over the increasingly mis-named prev_instr