GH-126910: add test for manual frame unwinding

[diegorusso]

Add a test that unwinds the stack using frame pointers. We test on any platform that frame pointers are enable (the others will be skipped). It tests with and without the JIT.

Output with PYTHON_JIT=0

#00 0xbcb53b0332f0 -> python
#01 0xbcb53b1c42b8 -> python
#02 0xbcb53b1ce4b8 -> python
#03 0xbcb53b1d758c -> python
#04 0xbcb53b0332f0 -> python
#05 0xbcb53b1c4774 -> python
#06 0xbcb53b1cfaec -> python
...
#68 0xbe2cbdec495c -> python
#69 0xeaad695b259c -> other
#70 0x60eaad695b267c -> other
#71 0x6be2cbdbc63f0 -> other
{"length": 53, "python_frames": 50, "jit_frames": 0, "other_frames": 3, "jit_code_ranges": 0, "jit_backend": "jit"}

Output with PYTHON_JIT=1

JIT ranges:
  0xeaad6985c000-0xeaad6985e000
#00 0xbe2cbdc332f0 -> python
#01 0xbe2cbddc42b8 -> python
#02 0xbe2cbddce4b8 -> python
#03 0xbe2cbddd758c -> python
#04 0xbe2cbdc332f0 -> python
#05 0xbe2cbddc4774 -> python
#06 0xeaad6985c898 -> jit
...
#61 0xeaad6985b050 -> jit
#62 0xbe2cbddd42a4 -> python
#63 0xbe2cbddd72d4 -> python
#64 0xbe2cbde90d3c -> python
#65 0xbe2cbde910d0 -> python
#66 0xbe2cbde93490 -> python
#67 0xbe2cbdec3d30 -> python
#68 0xbe2cbdec495c -> python
#69 0xeaad695b259c -> other
#70 0x60eaad695b267c -> other
#71 0x6be2cbdbc63f0 -> other
{"length": 72, "python_frames": 49, "jit_frames": 20, "other_frames": 3, "jit_code_ranges": 1, "jit_backend": "jit"}

The core of the test has been taken from @pablogsal repository https://github.com/pablogsal/cpython-unwind

• Issue: Supporting stack unwinding in the JIT compiler #126910

[bedevere-bot]

🤖 New build scheduled with the buildbot fleet by @diegorusso for commit 5d53a15 🤖

Results will be shown at:

https://buildbot.python.org/all/#/grid?branch=refs%2Fpull%2F144137%2Fmerge

If you want to schedule another build, you need to add the 🔨 test-with-buildbots label again.

[bedevere-bot]

🤖 New build scheduled with the buildbot fleet by @diegorusso for commit c179848 🤖

Results will be shown at:

https://buildbot.python.org/all/#/grid?branch=refs%2Fpull%2F144137%2Fmerge

If you want to schedule another build, you need to add the 🔨 test-with-buildbots label again.

[pablogsal]

This is not used anywhere

[diegorusso]

that's a leftover of a previous logic to test the existence of JIT frames. Will be removing it.

[diegorusso]

I guess you referred only to jit_code_ranges = len(ranges). The rest is needed.

[Fidget-Spinner]

There's https://docs.python.org/3/library/sys.html#sys._jit which you can use instead of this.