gh-118518: Allow perf to work without frame pointers (#112254)

1 files changed, 10 insertions, 0 deletions

diff --git a/Python/sysmodule.c b/Python/sysmodule.c
index bd7f821..17c4a5f 100644
--- a/Python/sysmodule.c
+++ b/Python/sysmodule.c
@@ -2282,6 +2282,16 @@ sys_activate_stack_trampoline_impl(PyObject *module, const char *backend)
                 return NULL;
             }
         }
+        else if (strcmp(backend, "perfjit") == 0) {
+            _PyPerf_Callbacks cur_cb;
+            _PyPerfTrampoline_GetCallbacks(&cur_cb);
+            if (cur_cb.write_state != _Py_perfmap_jit_callbacks.write_state) {
+                if (_PyPerfTrampoline_SetCallbacks(&_Py_perfmap_jit_callbacks) < 0 ) {
+                    PyErr_SetString(PyExc_ValueError, "can't activate perf jit trampoline");
+                    return NULL;
+                }
+            }
+        }
     }
     else {
         PyErr_Format(PyExc_ValueError, "invalid backend: %s", backend);