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gh-118335: Configure Tier 2 interpreter at build time (#118339)

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The code for Tier 2 is now only compiled when configured
with `--enable-experimental-jit[=yes|interpreter]`.

We drop support for `PYTHON_UOPS` and -`Xuops`,
but you can disable the interpreter or JIT
at runtime by setting `PYTHON_JIT=0`.
You can also build it without enabling it by default
using `--enable-experimental-jit=yes-off`;
enable with `PYTHON_JIT=1`.

On Windows, the `build.bat` script supports
`--experimental-jit`, `--experimental-jit-off`,
`--experimental-interpreter`.

In the C code, `_Py_JIT` is defined as before
when the JIT is enabled; the new variable
`_Py_TIER2` is defined when the JIT *or* the
interpreter is enabled. It is actually a bitmask:
1: JIT; 2: default-off; 4: interpreter.
This commit is contained in:
Guido van Rossum 2024-04-30 18:26:34 -07:00 • committed by GitHub
parent 9c468e2c5d
commit 7d83f7bcc4
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GPG key ID: B5690EEEBB952194
32 changed files with 181 additions and 42 deletions
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6
Python/instrumentation.c
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@ -1705,10 +1705,12 @@ instrument_lock_held(PyCodeObject *code, PyInterpreterState *interp)
);
return 0;
}
#ifdef _Py_TIER2
if (code->co_executors != NULL) {
_PyCode_Clear_Executors(code);
}
_Py_Executors_InvalidateDependency(interp, code, 1);
#endif
int code_len = (int)Py_SIZE(code);
/* Exit early to avoid creating instrumentation
* data for potential statically allocated code
@ -1946,7 +1948,9 @@ _PyMonitoring_SetEvents(int tool_id, _PyMonitoringEventSet events)
goto done;
}
set_global_version(tstate, new_version);
#ifdef _Py_TIER2
_Py_Executors_InvalidateAll(interp, 1);
#endif
res = instrument_all_executing_code_objects(interp);
done:
_PyEval_StartTheWorld(interp);
@ -1986,7 +1990,9 @@ _PyMonitoring_SetLocalEvents(PyCodeObject *code, int tool_id, _PyMonitoringEvent
code->_co_instrumentation_version -= MONITORING_VERSION_INCREMENT;
}
#ifdef _Py_TIER2
_Py_Executors_InvalidateDependency(interp, code, 1);
#endif
res = instrument_lock_held(code, interp);