GH-103082: Implementation of PEP 669: Low Impact Monitoring for CPython (GH-103083)

* The majority of the monitoring code is in instrumentation.c

* The new instrumentation bytecodes are in bytecodes.c

* legacy_tracing.c adapts the new API to the old sys.setrace and sys.setprofile APIs

1 files changed, 11 insertions, 0 deletions

diff --git a/Python/sysmodule.c b/Python/sysmodule.c
index f1a294de598..4d693a1be1f 100644
--- a/Python/sysmodule.c
+++ b/Python/sysmodule.c
@@ -3409,6 +3409,7 @@ error:
     return _PyStatus_ERR("can't set preliminary stderr");
 }
 
+PyObject *_Py_CreateMonitoringObject(void);
 
 /* Create sys module without all attributes.
    _PySys_UpdateConfig() should be called later to add remaining attributes. */
@@ -3458,6 +3459,16 @@ _PySys_Create(PyThreadState *tstate, PyObject **sysmod_p)
         goto error;
     }
 
+    PyObject *monitoring = _Py_CreateMonitoringObject();
+    if (monitoring == NULL) {
+        goto error;
+    }
+    int err = PyDict_SetItemString(sysdict, "monitoring", monitoring);
+    Py_DECREF(monitoring);
+    if (err < 0) {
+        goto error;
+    }
+
     assert(!_PyErr_Occurred(tstate));
 
     *sysmod_p = sysmod;