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gh-119258: Eliminate Type Guards in Tier 2 Optimizer with Watcher (GH-119365)
Co-authored-by: parmeggiani <parmeggiani@spaziodati.eu> Co-authored-by: dpdani <git@danieleparmeggiani.me> Co-authored-by: blurb-it[bot] <43283697+blurb-it[bot]@users.noreply.github.com> Co-authored-by: Brandt Bucher <brandtbucher@microsoft.com> Co-authored-by: Ken Jin <kenjin@python.org>
This commit is contained in:
parent
2080425154
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55402d3232
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@ -33,6 +33,7 @@ struct _Py_UopsSymbol {
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int flags; // 0 bits: Top; 2 or more bits: Bottom
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PyTypeObject *typ; // Borrowed reference
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PyObject *const_val; // Owned reference (!)
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unsigned int type_version; // currently stores type version
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};
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#define UOP_FORMAT_TARGET 0
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@ -123,9 +124,11 @@ extern _Py_UopsSymbol *_Py_uop_sym_new_const(_Py_UOpsContext *ctx, PyObject *con
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extern _Py_UopsSymbol *_Py_uop_sym_new_null(_Py_UOpsContext *ctx);
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extern bool _Py_uop_sym_has_type(_Py_UopsSymbol *sym);
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extern bool _Py_uop_sym_matches_type(_Py_UopsSymbol *sym, PyTypeObject *typ);
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extern bool _Py_uop_sym_matches_type_version(_Py_UopsSymbol *sym, unsigned int version);
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extern void _Py_uop_sym_set_null(_Py_UOpsContext *ctx, _Py_UopsSymbol *sym);
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extern void _Py_uop_sym_set_non_null(_Py_UOpsContext *ctx, _Py_UopsSymbol *sym);
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extern void _Py_uop_sym_set_type(_Py_UOpsContext *ctx, _Py_UopsSymbol *sym, PyTypeObject *typ);
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extern bool _Py_uop_sym_set_type_version(_Py_UOpsContext *ctx, _Py_UopsSymbol *sym, unsigned int version);
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extern void _Py_uop_sym_set_const(_Py_UOpsContext *ctx, _Py_UopsSymbol *sym, PyObject *const_val);
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extern bool _Py_uop_sym_is_bottom(_Py_UopsSymbol *sym);
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extern int _Py_uop_sym_truthiness(_Py_UopsSymbol *sym);
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@ -138,9 +141,9 @@ extern void _Py_uop_abstractcontext_fini(_Py_UOpsContext *ctx);
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extern _Py_UOpsAbstractFrame *_Py_uop_frame_new(
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_Py_UOpsContext *ctx,
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PyCodeObject *co,
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_Py_UopsSymbol **localsplus_start,
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int n_locals_already_filled,
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int curr_stackentries);
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int curr_stackentries,
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_Py_UopsSymbol **args,
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int arg_len);
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extern int _Py_uop_frame_pop(_Py_UOpsContext *ctx);
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PyAPI_FUNC(PyObject *) _Py_uop_symbols_test(PyObject *self, PyObject *ignored);
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@ -63,6 +63,8 @@ typedef struct {
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PyObject *tp_weaklist;
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} managed_static_type_state;
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#define TYPE_VERSION_CACHE_SIZE (1<<12) /* Must be a power of 2 */
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struct types_state {
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/* Used to set PyTypeObject.tp_version_tag.
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It starts at _Py_MAX_GLOBAL_TYPE_VERSION_TAG + 1,
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@ -118,6 +120,12 @@ struct types_state {
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managed_static_type_state initialized[_Py_MAX_MANAGED_STATIC_EXT_TYPES];
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} for_extensions;
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PyMutex mutex;
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// Borrowed references to type objects whose
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// tp_version_tag % TYPE_VERSION_CACHE_SIZE
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// once was equal to the index in the table.
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// They are cleared when the type object is deallocated.
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PyTypeObject *type_version_cache[TYPE_VERSION_CACHE_SIZE];
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};
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@ -230,6 +238,9 @@ extern void _PyType_SetFlags(PyTypeObject *self, unsigned long mask,
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extern void _PyType_SetFlagsRecursive(PyTypeObject *self, unsigned long mask,
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unsigned long flags);
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extern unsigned int _PyType_GetVersionForCurrentState(PyTypeObject *tp);
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PyAPI_FUNC(void) _PyType_SetVersion(PyTypeObject *tp, unsigned int version);
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PyTypeObject *_PyType_LookupByVersion(unsigned int version);
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#ifdef __cplusplus
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}
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@ -1333,6 +1333,153 @@ def test_modified_local_is_seen_by_optimized_code(self):
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self.assertIs(type(s), float)
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self.assertEqual(s, 1024.0)
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def test_guard_type_version_removed(self):
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def thing(a):
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x = 0
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for _ in range(100):
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x += a.attr
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x += a.attr
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return x
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class Foo:
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attr = 1
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res, ex = self._run_with_optimizer(thing, Foo())
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opnames = list(iter_opnames(ex))
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self.assertIsNotNone(ex)
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self.assertEqual(res, 200)
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guard_type_version_count = opnames.count("_GUARD_TYPE_VERSION")
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self.assertEqual(guard_type_version_count, 1)
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def test_guard_type_version_removed_inlined(self):
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"""
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Verify that the guard type version if we have an inlined function
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"""
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def fn():
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pass
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def thing(a):
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x = 0
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for _ in range(100):
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x += a.attr
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fn()
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x += a.attr
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return x
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class Foo:
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attr = 1
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res, ex = self._run_with_optimizer(thing, Foo())
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opnames = list(iter_opnames(ex))
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self.assertIsNotNone(ex)
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self.assertEqual(res, 200)
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guard_type_version_count = opnames.count("_GUARD_TYPE_VERSION")
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self.assertEqual(guard_type_version_count, 1)
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def test_guard_type_version_not_removed(self):
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"""
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Verify that the guard type version is not removed if we modify the class
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"""
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def thing(a):
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x = 0
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for i in range(100):
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x += a.attr
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# for the first 90 iterations we set the attribute on this dummy function which shouldn't
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# trigger the type watcher
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# then after 90 it should trigger it and stop optimizing
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# Note that the code needs to be in this weird form so it's optimized inline without any control flow
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setattr((Foo, Bar)[i < 90], "attr", 2)
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x += a.attr
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return x
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class Foo:
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attr = 1
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class Bar:
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pass
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res, ex = self._run_with_optimizer(thing, Foo())
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opnames = list(iter_opnames(ex))
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self.assertIsNotNone(ex)
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self.assertEqual(res, 219)
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guard_type_version_count = opnames.count("_GUARD_TYPE_VERSION")
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self.assertEqual(guard_type_version_count, 2)
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@unittest.expectedFailure
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def test_guard_type_version_not_removed_escaping(self):
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"""
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Verify that the guard type version is not removed if have an escaping function
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"""
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def thing(a):
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x = 0
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for i in range(100):
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x += a.attr
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# eval should be escaping and so should cause optimization to stop and preserve both type versions
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eval("None")
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x += a.attr
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return x
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class Foo:
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attr = 1
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res, ex = self._run_with_optimizer(thing, Foo())
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opnames = list(iter_opnames(ex))
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self.assertIsNotNone(ex)
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self.assertEqual(res, 200)
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guard_type_version_count = opnames.count("_GUARD_TYPE_VERSION")
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# Note: This will actually be 1 for noe
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# https://github.com/python/cpython/pull/119365#discussion_r1626220129
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self.assertEqual(guard_type_version_count, 2)
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def test_guard_type_version_executor_invalidated(self):
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"""
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Verify that the executor is invalided on a type change.
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"""
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def thing(a):
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x = 0
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for i in range(100):
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x += a.attr
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x += a.attr
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return x
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class Foo:
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attr = 1
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res, ex = self._run_with_optimizer(thing, Foo())
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self.assertEqual(res, 200)
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self.assertIsNotNone(ex)
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self.assertEqual(list(iter_opnames(ex)).count("_GUARD_TYPE_VERSION"), 1)
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self.assertTrue(ex.is_valid())
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Foo.attr = 0
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self.assertFalse(ex.is_valid())
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def test_type_version_doesnt_segfault(self):
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"""
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Tests that setting a type version doesn't cause a segfault when later looking at the stack.
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"""
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# Minimized from mdp.py benchmark
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class A:
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def __init__(self):
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self.attr = {}
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def method(self, arg):
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self.attr[arg] = None
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def fn(a):
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for _ in range(100):
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(_ for _ in [])
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(_ for _ in [a.method(None)])
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fn(A())
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if __name__ == "__main__":
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unittest.main()
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@ -282,8 +282,10 @@ class C: pass
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self.watch(wid, C)
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with catch_unraisable_exception() as cm:
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C.foo = "bar"
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self.assertEqual(cm.unraisable.err_msg,
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f"Exception ignored in type watcher callback #0 for {C!r}")
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self.assertEqual(
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cm.unraisable.err_msg,
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f"Exception ignored in type watcher callback #1 for {C!r}",
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)
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self.assertIs(cm.unraisable.object, None)
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self.assertEqual(str(cm.unraisable.exc_value), "boom!")
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self.assert_events([])
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@ -10,8 +10,9 @@
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# Skip this test if the _testcapi module isn't available.
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_testcapi = import_helper.import_module("_testcapi")
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_testinternalcapi = import_helper.import_module("_testinternalcapi")
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type_get_version = _testcapi.type_get_version
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type_assign_specific_version_unsafe = _testcapi.type_assign_specific_version_unsafe
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type_assign_specific_version_unsafe = _testinternalcapi.type_assign_specific_version_unsafe
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type_assign_version = _testcapi.type_assign_version
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type_modified = _testcapi.type_modified
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@ -0,0 +1,3 @@
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Eliminate type version guards in the tier two interpreter.
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Note that setting the ``tp_version_tag`` manually (which has never been supported) may result in crashes.
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@ -2403,21 +2403,6 @@ type_modified(PyObject *self, PyObject *type)
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Py_RETURN_NONE;
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}
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// Circumvents standard version assignment machinery - use with caution and only on
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// short-lived heap types
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static PyObject *
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type_assign_specific_version_unsafe(PyObject *self, PyObject *args)
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{
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PyTypeObject *type;
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unsigned int version;
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if (!PyArg_ParseTuple(args, "Oi:type_assign_specific_version_unsafe", &type, &version)) {
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return NULL;
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}
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assert(!PyType_HasFeature(type, Py_TPFLAGS_IMMUTABLETYPE));
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type->tp_version_tag = version;
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type->tp_flags |= Py_TPFLAGS_VALID_VERSION_TAG;
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Py_RETURN_NONE;
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}
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static PyObject *
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type_assign_version(PyObject *self, PyObject *type)
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@ -3427,8 +3412,6 @@ static PyMethodDef TestMethods[] = {
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{"test_py_is_funcs", test_py_is_funcs, METH_NOARGS},
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{"type_get_version", type_get_version, METH_O, PyDoc_STR("type->tp_version_tag")},
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{"type_modified", type_modified, METH_O, PyDoc_STR("PyType_Modified")},
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{"type_assign_specific_version_unsafe", type_assign_specific_version_unsafe, METH_VARARGS,
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PyDoc_STR("forcefully assign type->tp_version_tag")},
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{"type_assign_version", type_assign_version, METH_O, PyDoc_STR("PyUnstable_Type_AssignVersionTag")},
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{"type_get_tp_bases", type_get_tp_bases, METH_O},
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{"type_get_tp_mro", type_get_tp_mro, METH_O},
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@ -2002,6 +2002,22 @@ has_inline_values(PyObject *self, PyObject *obj)
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}
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// Circumvents standard version assignment machinery - use with caution and only on
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// short-lived heap types
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static PyObject *
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type_assign_specific_version_unsafe(PyObject *self, PyObject *args)
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{
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PyTypeObject *type;
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unsigned int version;
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if (!PyArg_ParseTuple(args, "Oi:type_assign_specific_version_unsafe", &type, &version)) {
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return NULL;
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}
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assert(!PyType_HasFeature(type, Py_TPFLAGS_IMMUTABLETYPE));
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_PyType_SetVersion(type, version);
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type->tp_flags |= Py_TPFLAGS_VALID_VERSION_TAG;
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Py_RETURN_NONE;
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}
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/*[clinic input]
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gh_119213_getargs
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@ -2102,6 +2118,9 @@ static PyMethodDef module_functions[] = {
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{"get_rare_event_counters", get_rare_event_counters, METH_NOARGS},
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{"reset_rare_event_counters", reset_rare_event_counters, METH_NOARGS},
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{"has_inline_values", has_inline_values, METH_O},
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{"type_assign_specific_version_unsafe", type_assign_specific_version_unsafe, METH_VARARGS,
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PyDoc_STR("forcefully assign type->tp_version_tag")},
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#ifdef Py_GIL_DISABLED
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{"py_thread_id", get_py_thread_id, METH_NOARGS},
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#endif
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@ -853,7 +853,8 @@ PyType_AddWatcher(PyType_WatchCallback callback)
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{
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PyInterpreterState *interp = _PyInterpreterState_GET();
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for (int i = 0; i < TYPE_MAX_WATCHERS; i++) {
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// start at 1, 0 is reserved for cpython optimizer
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for (int i = 1; i < TYPE_MAX_WATCHERS; i++) {
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if (!interp->type_watchers[i]) {
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interp->type_watchers[i] = callback;
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return i;
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@ -960,7 +961,7 @@ type_modification_starting_unlocked(PyTypeObject *type)
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}
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/* 0 is not a valid version tag */
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_Py_atomic_store_uint32_release(&type->tp_version_tag, 0);
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_PyType_SetVersion(type, 0);
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}
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#endif
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@ -1024,7 +1025,7 @@ type_modified_unlocked(PyTypeObject *type)
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}
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type->tp_flags &= ~Py_TPFLAGS_VALID_VERSION_TAG;
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FT_ATOMIC_STORE_UINT32_RELAXED(type->tp_version_tag, 0); /* 0 is not a valid version tag */
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_PyType_SetVersion(type, 0); /* 0 is not a valid version tag */
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if (PyType_HasFeature(type, Py_TPFLAGS_HEAPTYPE)) {
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// This field *must* be invalidated if the type is modified (see the
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// comment on struct _specialization_cache):
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@ -1101,7 +1102,7 @@ type_mro_modified(PyTypeObject *type, PyObject *bases) {
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clear:
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assert(!(type->tp_flags & _Py_TPFLAGS_STATIC_BUILTIN));
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type->tp_flags &= ~Py_TPFLAGS_VALID_VERSION_TAG;
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FT_ATOMIC_STORE_UINT32_RELAXED(type->tp_version_tag, 0); /* 0 is not a valid version tag */
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_PyType_SetVersion(type, 0); /* 0 is not a valid version tag */
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if (PyType_HasFeature(type, Py_TPFLAGS_HEAPTYPE)) {
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// This field *must* be invalidated if the type is modified (see the
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// comment on struct _specialization_cache):
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@ -1109,6 +1110,64 @@ type_mro_modified(PyTypeObject *type, PyObject *bases) {
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}
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}
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/*
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The Tier 2 interpreter requires looking up the type object by the type version, so it can install
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watchers to understand when they change.
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So we add a global cache from type version to borrowed references of type objects.
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This is similar to func_version_cache.
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*/
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void
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_PyType_SetVersion(PyTypeObject *tp, unsigned int version)
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{
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#ifndef Py_GIL_DISABLED
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PyInterpreterState *interp = _PyInterpreterState_GET();
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// lookup the old version and set to null
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if (tp->tp_version_tag != 0) {
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PyTypeObject **slot =
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interp->types.type_version_cache
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+ (tp->tp_version_tag % TYPE_VERSION_CACHE_SIZE);
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*slot = NULL;
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}
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#endif
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FT_ATOMIC_STORE_UINT32_RELAXED(tp->tp_version_tag, version);
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#ifndef Py_GIL_DISABLED
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if (version != 0) {
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PyTypeObject **slot =
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interp->types.type_version_cache
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+ (version % TYPE_VERSION_CACHE_SIZE);
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*slot = tp;
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}
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#endif
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}
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PyTypeObject *
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_PyType_LookupByVersion(unsigned int version)
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{
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#ifdef Py_GIL_DISABLED
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return NULL;
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#else
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PyInterpreterState *interp = _PyInterpreterState_GET();
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PyTypeObject **slot =
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interp->types.type_version_cache
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+ (version % TYPE_VERSION_CACHE_SIZE);
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if (*slot && (*slot)->tp_version_tag == version) {
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return *slot;
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}
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return NULL;
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#endif
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}
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unsigned int
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_PyType_GetVersionForCurrentState(PyTypeObject *tp)
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{
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return tp->tp_version_tag;
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}
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#define MAX_VERSIONS_PER_CLASS 1000
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static int
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@ -1137,8 +1196,7 @@ assign_version_tag(PyInterpreterState *interp, PyTypeObject *type)
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/* We have run out of version numbers */
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return 0;
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}
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FT_ATOMIC_STORE_UINT32_RELAXED(type->tp_version_tag,
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NEXT_GLOBAL_VERSION_TAG++);
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_PyType_SetVersion(type, NEXT_GLOBAL_VERSION_TAG++);
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assert (type->tp_version_tag <= _Py_MAX_GLOBAL_TYPE_VERSION_TAG);
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}
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else {
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||||
|
@ -1147,8 +1205,7 @@ assign_version_tag(PyInterpreterState *interp, PyTypeObject *type)
|
|||
/* We have run out of version numbers */
|
||||
return 0;
|
||||
}
|
||||
FT_ATOMIC_STORE_UINT32_RELAXED(type->tp_version_tag,
|
||||
NEXT_VERSION_TAG(interp)++);
|
||||
_PyType_SetVersion(type, NEXT_VERSION_TAG(interp)++);
|
||||
assert (type->tp_version_tag != 0);
|
||||
}
|
||||
|
||||
|
@ -5768,7 +5825,7 @@ fini_static_type(PyInterpreterState *interp, PyTypeObject *type,
|
|||
if (final) {
|
||||
type->tp_flags &= ~Py_TPFLAGS_READY;
|
||||
type->tp_flags &= ~Py_TPFLAGS_VALID_VERSION_TAG;
|
||||
type->tp_version_tag = 0;
|
||||
_PyType_SetVersion(type, 0);
|
||||
}
|
||||
|
||||
_PyStaticType_ClearWeakRefs(interp, type);
|
||||
|
@ -5798,7 +5855,6 @@ type_dealloc(PyObject *self)
|
|||
_PyObject_ASSERT((PyObject *)type, type->tp_flags & Py_TPFLAGS_HEAPTYPE);
|
||||
|
||||
_PyObject_GC_UNTRACK(type);
|
||||
|
||||
type_dealloc_common(type);
|
||||
|
||||
// PyObject_ClearWeakRefs() raises an exception if Py_REFCNT() != 0
|
||||
|
@ -8367,7 +8423,7 @@ init_static_type(PyInterpreterState *interp, PyTypeObject *self,
|
|||
self->tp_flags |= Py_TPFLAGS_IMMUTABLETYPE;
|
||||
|
||||
assert(NEXT_GLOBAL_VERSION_TAG <= _Py_MAX_GLOBAL_TYPE_VERSION_TAG);
|
||||
self->tp_version_tag = NEXT_GLOBAL_VERSION_TAG++;
|
||||
_PyType_SetVersion(self, NEXT_GLOBAL_VERSION_TAG++);
|
||||
self->tp_flags |= Py_TPFLAGS_VALID_VERSION_TAG;
|
||||
}
|
||||
else {
|
||||
|
|
|
@ -79,6 +79,7 @@ increment_mutations(PyObject* dict) {
|
|||
* so we don't need to check that they haven't been used */
|
||||
#define BUILTINS_WATCHER_ID 0
|
||||
#define GLOBALS_WATCHER_ID 1
|
||||
#define TYPE_WATCHER_ID 0
|
||||
|
||||
static int
|
||||
globals_watcher_callback(PyDict_WatchEvent event, PyObject* dict,
|
||||
|
@ -92,6 +93,14 @@ globals_watcher_callback(PyDict_WatchEvent event, PyObject* dict,
|
|||
return 0;
|
||||
}
|
||||
|
||||
static int
|
||||
type_watcher_callback(PyTypeObject* type)
|
||||
{
|
||||
_Py_Executors_InvalidateDependency(_PyInterpreterState_GET(), type, 1);
|
||||
PyType_Unwatch(TYPE_WATCHER_ID, (PyObject *)type);
|
||||
return 0;
|
||||
}
|
||||
|
||||
static PyObject *
|
||||
convert_global_to_const(_PyUOpInstruction *inst, PyObject *obj)
|
||||
{
|
||||
|
@ -167,6 +176,9 @@ remove_globals(_PyInterpreterFrame *frame, _PyUOpInstruction *buffer,
|
|||
if (interp->dict_state.watchers[GLOBALS_WATCHER_ID] == NULL) {
|
||||
interp->dict_state.watchers[GLOBALS_WATCHER_ID] = globals_watcher_callback;
|
||||
}
|
||||
if (interp->type_watchers[TYPE_WATCHER_ID] == NULL) {
|
||||
interp->type_watchers[TYPE_WATCHER_ID] = type_watcher_callback;
|
||||
}
|
||||
for (int pc = 0; pc < buffer_size; pc++) {
|
||||
_PyUOpInstruction *inst = &buffer[pc];
|
||||
int opcode = inst->opcode;
|
||||
|
@ -310,9 +322,11 @@ remove_globals(_PyInterpreterFrame *frame, _PyUOpInstruction *buffer,
|
|||
#define sym_has_type _Py_uop_sym_has_type
|
||||
#define sym_get_type _Py_uop_sym_get_type
|
||||
#define sym_matches_type _Py_uop_sym_matches_type
|
||||
#define sym_matches_type_version _Py_uop_sym_matches_type_version
|
||||
#define sym_set_null(SYM) _Py_uop_sym_set_null(ctx, SYM)
|
||||
#define sym_set_non_null(SYM) _Py_uop_sym_set_non_null(ctx, SYM)
|
||||
#define sym_set_type(SYM, TYPE) _Py_uop_sym_set_type(ctx, SYM, TYPE)
|
||||
#define sym_set_type_version(SYM, VERSION) _Py_uop_sym_set_type_version(ctx, SYM, VERSION)
|
||||
#define sym_set_const(SYM, CNST) _Py_uop_sym_set_const(ctx, SYM, CNST)
|
||||
#define sym_is_bottom _Py_uop_sym_is_bottom
|
||||
#define sym_truthiness _Py_uop_sym_truthiness
|
||||
|
@ -395,7 +409,7 @@ optimize_uops(
|
|||
_PyUOpInstruction *corresponding_check_stack = NULL;
|
||||
|
||||
_Py_uop_abstractcontext_init(ctx);
|
||||
_Py_UOpsAbstractFrame *frame = _Py_uop_frame_new(ctx, co, ctx->n_consumed, 0, curr_stacklen);
|
||||
_Py_UOpsAbstractFrame *frame = _Py_uop_frame_new(ctx, co, curr_stacklen, NULL, 0);
|
||||
if (frame == NULL) {
|
||||
return -1;
|
||||
}
|
||||
|
|
|
@ -21,11 +21,13 @@ typedef struct _Py_UOpsAbstractFrame _Py_UOpsAbstractFrame;
|
|||
#define sym_new_const _Py_uop_sym_new_const
|
||||
#define sym_new_null _Py_uop_sym_new_null
|
||||
#define sym_matches_type _Py_uop_sym_matches_type
|
||||
#define sym_matches_type_version _Py_uop_sym_matches_type_version
|
||||
#define sym_get_type _Py_uop_sym_get_type
|
||||
#define sym_has_type _Py_uop_sym_has_type
|
||||
#define sym_set_null(SYM) _Py_uop_sym_set_null(ctx, SYM)
|
||||
#define sym_set_non_null(SYM) _Py_uop_sym_set_non_null(ctx, SYM)
|
||||
#define sym_set_type(SYM, TYPE) _Py_uop_sym_set_type(ctx, SYM, TYPE)
|
||||
#define sym_set_type_version(SYM, VERSION) _Py_uop_sym_set_type_version(ctx, SYM, VERSION)
|
||||
#define sym_set_const(SYM, CNST) _Py_uop_sym_set_const(ctx, SYM, CNST)
|
||||
#define sym_is_bottom _Py_uop_sym_is_bottom
|
||||
#define frame_new _Py_uop_frame_new
|
||||
|
@ -113,6 +115,29 @@ dummy_func(void) {
|
|||
sym_set_type(right, &PyLong_Type);
|
||||
}
|
||||
|
||||
op(_GUARD_TYPE_VERSION, (type_version/2, owner -- owner)) {
|
||||
assert(type_version);
|
||||
if (sym_matches_type_version(owner, type_version)) {
|
||||
REPLACE_OP(this_instr, _NOP, 0, 0);
|
||||
} else {
|
||||
// add watcher so that whenever the type changes we invalidate this
|
||||
PyTypeObject *type = _PyType_LookupByVersion(type_version);
|
||||
// if the type is null, it was not found in the cache (there was a conflict)
|
||||
// with the key, in which case we can't trust the version
|
||||
if (type) {
|
||||
// if the type version was set properly, then add a watcher
|
||||
// if it wasn't this means that the type version was previously set to something else
|
||||
// and we set the owner to bottom, so we don't need to add a watcher because we must have
|
||||
// already added one earlier.
|
||||
if (sym_set_type_version(owner, type_version)) {
|
||||
PyType_Watch(TYPE_WATCHER_ID, (PyObject *)type);
|
||||
_Py_BloomFilter_Add(dependencies, type);
|
||||
}
|
||||
}
|
||||
|
||||
}
|
||||
}
|
||||
|
||||
op(_GUARD_BOTH_FLOAT, (left, right -- left, right)) {
|
||||
if (sym_matches_type(left, &PyFloat_Type)) {
|
||||
if (sym_matches_type(right, &PyFloat_Type)) {
|
||||
|
@ -563,16 +588,12 @@ dummy_func(void) {
|
|||
argcount++;
|
||||
}
|
||||
|
||||
_Py_UopsSymbol **localsplus_start = ctx->n_consumed;
|
||||
int n_locals_already_filled = 0;
|
||||
// Can determine statically, so we interleave the new locals
|
||||
// and make the current stack the new locals.
|
||||
// This also sets up for true call inlining.
|
||||
if (sym_is_null(self_or_null) || sym_is_not_null(self_or_null)) {
|
||||
localsplus_start = args;
|
||||
n_locals_already_filled = argcount;
|
||||
new_frame = frame_new(ctx, co, 0, args, argcount);
|
||||
} else {
|
||||
new_frame = frame_new(ctx, co, 0, NULL, 0);
|
||||
|
||||
}
|
||||
new_frame = frame_new(ctx, co, localsplus_start, n_locals_already_filled, 0);
|
||||
}
|
||||
|
||||
op(_PY_FRAME_GENERAL, (callable, self_or_null, args[oparg] -- new_frame: _Py_UOpsAbstractFrame *)) {
|
||||
|
|
33
Python/optimizer_cases.c.h
generated
33
Python/optimizer_cases.c.h
generated
|
@ -930,6 +930,28 @@
|
|||
}
|
||||
|
||||
case _GUARD_TYPE_VERSION: {
|
||||
_Py_UopsSymbol *owner;
|
||||
owner = stack_pointer[-1];
|
||||
uint32_t type_version = (uint32_t)this_instr->operand;
|
||||
assert(type_version);
|
||||
if (sym_matches_type_version(owner, type_version)) {
|
||||
REPLACE_OP(this_instr, _NOP, 0, 0);
|
||||
} else {
|
||||
// add watcher so that whenever the type changes we invalidate this
|
||||
PyTypeObject *type = _PyType_LookupByVersion(type_version);
|
||||
// if the type is null, it was not found in the cache (there was a conflict)
|
||||
// with the key, in which case we can't trust the version
|
||||
if (type) {
|
||||
// if the type version was set properly, then add a watcher
|
||||
// if it wasn't this means that the type version was previously set to something else
|
||||
// and we set the owner to bottom, so we don't need to add a watcher because we must have
|
||||
// already added one earlier.
|
||||
if (sym_set_type_version(owner, type_version)) {
|
||||
PyType_Watch(TYPE_WATCHER_ID, (PyObject *)type);
|
||||
_Py_BloomFilter_Add(dependencies, type);
|
||||
}
|
||||
}
|
||||
}
|
||||
break;
|
||||
}
|
||||
|
||||
|
@ -1583,16 +1605,11 @@
|
|||
args--;
|
||||
argcount++;
|
||||
}
|
||||
_Py_UopsSymbol **localsplus_start = ctx->n_consumed;
|
||||
int n_locals_already_filled = 0;
|
||||
// Can determine statically, so we interleave the new locals
|
||||
// and make the current stack the new locals.
|
||||
// This also sets up for true call inlining.
|
||||
if (sym_is_null(self_or_null) || sym_is_not_null(self_or_null)) {
|
||||
localsplus_start = args;
|
||||
n_locals_already_filled = argcount;
|
||||
new_frame = frame_new(ctx, co, 0, args, argcount);
|
||||
} else {
|
||||
new_frame = frame_new(ctx, co, 0, NULL, 0);
|
||||
}
|
||||
new_frame = frame_new(ctx, co, localsplus_start, n_locals_already_filled, 0);
|
||||
stack_pointer[-2 - oparg] = (_Py_UopsSymbol *)new_frame;
|
||||
stack_pointer += -1 - oparg;
|
||||
break;
|
||||
|
|
|
@ -52,7 +52,8 @@ static inline int get_lltrace(void) {
|
|||
static _Py_UopsSymbol NO_SPACE_SYMBOL = {
|
||||
.flags = IS_NULL | NOT_NULL | NO_SPACE,
|
||||
.typ = NULL,
|
||||
.const_val = NULL
|
||||
.const_val = NULL,
|
||||
.type_version = 0,
|
||||
};
|
||||
|
||||
_Py_UopsSymbol *
|
||||
|
@ -76,6 +77,7 @@ sym_new(_Py_UOpsContext *ctx)
|
|||
self->flags = 0;
|
||||
self->typ = NULL;
|
||||
self->const_val = NULL;
|
||||
self->type_version = 0;
|
||||
|
||||
return self;
|
||||
}
|
||||
|
@ -152,6 +154,18 @@ _Py_uop_sym_set_type(_Py_UOpsContext *ctx, _Py_UopsSymbol *sym, PyTypeObject *ty
|
|||
}
|
||||
}
|
||||
|
||||
bool
|
||||
_Py_uop_sym_set_type_version(_Py_UOpsContext *ctx, _Py_UopsSymbol *sym, unsigned int version)
|
||||
{
|
||||
// if the type version was already set, then it must be different and we should set it to bottom
|
||||
if (sym->type_version) {
|
||||
sym_set_bottom(ctx, sym);
|
||||
return false;
|
||||
}
|
||||
sym->type_version = version;
|
||||
return true;
|
||||
}
|
||||
|
||||
void
|
||||
_Py_uop_sym_set_const(_Py_UOpsContext *ctx, _Py_UopsSymbol *sym, PyObject *const_val)
|
||||
{
|
||||
|
@ -256,6 +270,12 @@ _Py_uop_sym_get_type(_Py_UopsSymbol *sym)
|
|||
return sym->typ;
|
||||
}
|
||||
|
||||
unsigned int
|
||||
_Py_uop_sym_get_type_version(_Py_UopsSymbol *sym)
|
||||
{
|
||||
return sym->type_version;
|
||||
}
|
||||
|
||||
bool
|
||||
_Py_uop_sym_has_type(_Py_UopsSymbol *sym)
|
||||
{
|
||||
|
@ -272,6 +292,13 @@ _Py_uop_sym_matches_type(_Py_UopsSymbol *sym, PyTypeObject *typ)
|
|||
return _Py_uop_sym_get_type(sym) == typ;
|
||||
}
|
||||
|
||||
bool
|
||||
_Py_uop_sym_matches_type_version(_Py_UopsSymbol *sym, unsigned int version)
|
||||
{
|
||||
return _Py_uop_sym_get_type_version(sym) == version;
|
||||
}
|
||||
|
||||
|
||||
int
|
||||
_Py_uop_sym_truthiness(_Py_UopsSymbol *sym)
|
||||
{
|
||||
|
@ -311,9 +338,9 @@ _Py_UOpsAbstractFrame *
|
|||
_Py_uop_frame_new(
|
||||
_Py_UOpsContext *ctx,
|
||||
PyCodeObject *co,
|
||||
_Py_UopsSymbol **localsplus_start,
|
||||
int n_locals_already_filled,
|
||||
int curr_stackentries)
|
||||
int curr_stackentries,
|
||||
_Py_UopsSymbol **args,
|
||||
int arg_len)
|
||||
{
|
||||
assert(ctx->curr_frame_depth < MAX_ABSTRACT_FRAME_DEPTH);
|
||||
_Py_UOpsAbstractFrame *frame = &ctx->frames[ctx->curr_frame_depth];
|
||||
|
@ -321,19 +348,22 @@ _Py_uop_frame_new(
|
|||
frame->stack_len = co->co_stacksize;
|
||||
frame->locals_len = co->co_nlocalsplus;
|
||||
|
||||
frame->locals = localsplus_start;
|
||||
frame->locals = ctx->n_consumed;
|
||||
frame->stack = frame->locals + co->co_nlocalsplus;
|
||||
frame->stack_pointer = frame->stack + curr_stackentries;
|
||||
ctx->n_consumed = localsplus_start + (co->co_nlocalsplus + co->co_stacksize);
|
||||
ctx->n_consumed = ctx->n_consumed + (co->co_nlocalsplus + co->co_stacksize);
|
||||
if (ctx->n_consumed >= ctx->limit) {
|
||||
ctx->done = true;
|
||||
ctx->out_of_space = true;
|
||||
return NULL;
|
||||
}
|
||||
|
||||
|
||||
// Initialize with the initial state of all local variables
|
||||
for (int i = n_locals_already_filled; i < co->co_nlocalsplus; i++) {
|
||||
for (int i = 0; i < arg_len; i++) {
|
||||
frame->locals[i] = args[i];
|
||||
}
|
||||
|
||||
for (int i = arg_len; i < co->co_nlocalsplus; i++) {
|
||||
_Py_UopsSymbol *local = _Py_uop_sym_new_unknown(ctx);
|
||||
frame->locals[i] = local;
|
||||
}
|
||||
|
|
Loading…
Reference in a new issue