https://github.com/python/cpython/pull/125019

--- Python-3.14.2/Python/bytecodes.c.orig
+++ Python-3.14.2/Python/bytecodes.c
@@ -1201,6 +1201,7 @@
             DEAD(retval);
             SAVE_STACK();
             assert(STACK_LEVEL() == 0);
+            DTRACE_FUNCTION_EXIT();
             _Py_LeaveRecursiveCallPy(tstate);
             // GH-99729: We need to unlink the frame *before* clearing it:
             _PyInterpreterFrame *dying = frame;
@@ -1376,6 +1377,7 @@
             _PyStackRef temp = retval;
             DEAD(retval);
             SAVE_STACK();
+            DTRACE_FUNCTION_EXIT();
             tstate->exc_info = gen->gi_exc_state.previous_item;
             gen->gi_exc_state.previous_item = NULL;
             _Py_LeaveRecursiveCallPy(tstate);
--- Python-3.14.2/Python/ceval.c.orig
+++ Python-3.14.2/Python/ceval.c
@@ -1197,6 +1197,7 @@
 #endif
         /* Because this avoids the RESUME, we need to update instrumentation */
         _Py_Instrument(_PyFrame_GetCode(frame), tstate->interp);
+        DTRACE_FUNCTION_ENTRY();
         next_instr = frame->instr_ptr;
         monitor_throw(tstate, frame, next_instr);
         stack_pointer = _PyFrame_GetStackPointer(frame);
@@ -1216,6 +1217,8 @@
     _PyExecutorObject *current_executor = NULL;
     const _PyUOpInstruction *next_uop = NULL;
 #endif
+    DTRACE_FUNCTION_ENTRY();
+
 #if Py_TAIL_CALL_INTERP
 #   if Py_STATS
         return _TAIL_CALL_start_frame(frame, NULL, tstate, NULL, 0, lastopcode);
@@ -3494,6 +3497,37 @@
     return new_index;
 }
 
+
+static void
+dtrace_function_entry(_PyInterpreterFrame *frame)
+{
+    const char *filename;
+    const char *funcname;
+    int lineno;
+
+    PyCodeObject *code = _PyFrame_GetCode(frame);
+    filename = PyUnicode_AsUTF8(code->co_filename);
+    funcname = PyUnicode_AsUTF8(code->co_name);
+    lineno = PyUnstable_InterpreterFrame_GetLine(frame);
+
+    PyDTrace_FUNCTION_ENTRY(filename, funcname, lineno);
+}
+
+static void
+dtrace_function_return(_PyInterpreterFrame *frame)
+{
+    const char *filename;
+    const char *funcname;
+    int lineno;
+
+    PyCodeObject *code = _PyFrame_GetCode(frame);
+    filename = PyUnicode_AsUTF8(code->co_filename);
+    funcname = PyUnicode_AsUTF8(code->co_name);
+    lineno = PyUnstable_InterpreterFrame_GetLine(frame);
+
+    PyDTrace_FUNCTION_RETURN(filename, funcname, lineno);
+}
+
 /* Implement Py_EnterRecursiveCall() and Py_LeaveRecursiveCall() as functions
    for the limited API. */
 
--- Python-3.14.2/Python/ceval_macros.h.orig
+++ Python-3.14.2/Python/ceval_macros.h
@@ -41,6 +41,8 @@
  * the CFG.
  */
 
+#include "pycore_frame.h"
+
 #ifdef WITH_DTRACE
 #define OR_DTRACE_LINE | (PyDTrace_LINE_ENABLED() ? 255 : 0)
 #else
@@ -274,6 +276,15 @@
 #define CONSTS() _PyFrame_GetCode(frame)->co_consts
 #define NAMES() _PyFrame_GetCode(frame)->co_names
 
+static void dtrace_function_entry(_PyInterpreterFrame *);
+static void dtrace_function_return(_PyInterpreterFrame *);
+
+#define DTRACE_FUNCTION_EXIT() \
+    if (PyDTrace_FUNCTION_RETURN_ENABLED()) { \
+        dtrace_function_return(frame); \
+    }
+
+
 #define DTRACE_FUNCTION_ENTRY()  \
     if (PyDTrace_FUNCTION_ENTRY_ENABLED()) { \
         dtrace_function_entry(frame); \
--- Python-3.14.2/Python/executor_cases.c.h.orig
+++ Python-3.14.2/Python/executor_cases.c.h
@@ -1812,6 +1812,7 @@
             assert(WITHIN_STACK_BOUNDS());
             _PyFrame_SetStackPointer(frame, stack_pointer);
             assert(STACK_LEVEL() == 0);
+            DTRACE_FUNCTION_EXIT();
             _Py_LeaveRecursiveCallPy(tstate);
             _PyInterpreterFrame *dying = frame;
             frame = tstate->current_frame = dying->previous;
@@ -1966,6 +1967,7 @@
             stack_pointer += -1;
             assert(WITHIN_STACK_BOUNDS());
             _PyFrame_SetStackPointer(frame, stack_pointer);
+            DTRACE_FUNCTION_EXIT();
             tstate->exc_info = gen->gi_exc_state.previous_item;
             gen->gi_exc_state.previous_item = NULL;
             _Py_LeaveRecursiveCallPy(tstate);
--- Python-3.14.2/Python/generated_cases.c.h.orig
+++ Python-3.14.2/Python/generated_cases.c.h
@@ -7590,6 +7590,7 @@
                 assert(WITHIN_STACK_BOUNDS());
                 _PyFrame_SetStackPointer(frame, stack_pointer);
                 assert(STACK_LEVEL() == 0);
+                DTRACE_FUNCTION_EXIT();
                 _Py_LeaveRecursiveCallPy(tstate);
                 _PyInterpreterFrame *dying = frame;
                 frame = tstate->current_frame = dying->previous;
@@ -7647,6 +7648,7 @@
                 stack_pointer += -1;
                 assert(WITHIN_STACK_BOUNDS());
                 _PyFrame_SetStackPointer(frame, stack_pointer);
+                DTRACE_FUNCTION_EXIT();
                 tstate->exc_info = gen->gi_exc_state.previous_item;
                 gen->gi_exc_state.previous_item = NULL;
                 _Py_LeaveRecursiveCallPy(tstate);
@@ -10627,6 +10629,7 @@
             assert(WITHIN_STACK_BOUNDS());
             _PyFrame_SetStackPointer(frame, stack_pointer);
             assert(STACK_LEVEL() == 0);
+            DTRACE_FUNCTION_EXIT();
             _Py_LeaveRecursiveCallPy(tstate);
             _PyInterpreterFrame *dying = frame;
             frame = tstate->current_frame = dying->previous;
@@ -12330,6 +12333,7 @@
             stack_pointer += -1;
             assert(WITHIN_STACK_BOUNDS());
             _PyFrame_SetStackPointer(frame, stack_pointer);
+            DTRACE_FUNCTION_EXIT();
             tstate->exc_info = gen->gi_exc_state.previous_item;
             gen->gi_exc_state.previous_item = NULL;
             _Py_LeaveRecursiveCallPy(tstate);
--- Python-3.14.2/Tools/jit/template.c.orig
+++ Python-3.14.2/Tools/jit/template.c
@@ -26,6 +26,7 @@
 #include "pycore_setobject.h"
 #include "pycore_sliceobject.h"
 #include "pycore_stackref.h"
+#include "pydtrace.h"
 #include "pycore_template.h"
 #include "pycore_tuple.h"
 #include "pycore_unicodeobject.h"