Remove _get_tlbc_blocks

Author: mpage

Lib/test/test_thread_local_bytecode.py

@@ -193,43 +193,6 @@ def f(q):
         """)
         assert_python_ok("-X", "tlbc=1", "-c", code)
 
-    def test_tlbc_cleanup(self):
-        code = textwrap.dedent("""
-        import gc
-        import sys
-        import threading
-
-        def f(barrier, callee):
-            barrier.wait()
-            return callee()
-
-        # Define callee dynamically so that the module body's constants don't
-        # hold a strong reference to the code object.
-        ns = {}
-        exec('def func(): return 42', globals=ns)
-        callee = ns.pop('func')
-
-        # Create 5 copies of callee's bytecode
-        threads = []
-        barrier = threading.Barrier(5)
-        for _ in range(barrier.parties):
-            t = threading.Thread(target=f, args=(barrier, callee))
-            t.start()
-            threads.append(t)
-        for t in threads:
-            t.join()
-
-        # Destroy the only reference to callee's code object. All the tlbc
-        # copies should be destroyed when the code object is destroyed in the
-        # call to gc.collect below.
-        before = sys._get_tlbc_blocks()
-        callee.__code__ = f.__code__
-        gc.collect()
-        after = sys._get_tlbc_blocks()
-        assert (before - after) == len(threads)
-        """)
-        assert_python_ok("-X", "tlbc=1", "-c", code)
-
 
 if __name__ == "__main__":
     unittest.main()

Python/clinic/sysmodule.c.h

@@ -2448,41 +2448,6 @@ sys__is_gil_enabled_impl(PyObject *module)
 #endif
 }
 
-#ifdef Py_GIL_DISABLED
-static int
-count_tlbc_blocks(PyObject *obj, Py_ssize_t *count)
-{
-    if (PyCode_Check(obj)) {
-        _PyCodeArray *tlbc = ((PyCodeObject *)obj)->co_tlbc;
-        // First entry always points to the bytecode at the end of the code
-        // object. Exclude it from the count as it is allocated as part of
-        // creating the code object.
-        for (Py_ssize_t i = 1; i < tlbc->size; i++) {
-            if (tlbc->entries[i] != NULL) {
-                (*count)++;
-            }
-        }
-    }
-    return 1;
-}
-
-/*[clinic input]
-sys._get_tlbc_blocks -> Py_ssize_t
-
-Return the total number of thread-local bytecode copies, excluding the copies that are embedded in the code object.
-[clinic start generated code]*/
-
-static Py_ssize_t
-sys__get_tlbc_blocks_impl(PyObject *module)
-/*[clinic end generated code: output=4b4e350583cbd643 input=37c14e47d8905a95]*/
-{
-    Py_ssize_t count = 0;
-    PyUnstable_GC_VisitObjects((gcvisitobjects_t) count_tlbc_blocks, &count);
-    return count;
-}
-#endif   /* Py_GIL_DISABLED */
-
-
 
 static PerfMapState perf_map_state;
 
@@ -2658,7 +2623,6 @@ static PyMethodDef sys_methods[] = {
 #endif
     SYS__GET_CPU_COUNT_CONFIG_METHODDEF
     SYS__IS_GIL_ENABLED_METHODDEF
-    SYS__GET_TLBC_BLOCKS_METHODDEF
     {NULL, NULL}  // sentinel
 };