fix

Author: corona10

Include/internal/pycore_tstate.h

@@ -59,6 +59,7 @@ typedef struct _PyJitMetrics {
     uint16_t side_exit_initial_value;
     uint16_t side_exit_initial_backoff;
 } _PyJitMetrics;
+
 #endif
 
 // Every PyThreadState is actually allocated as a _PyThreadStateImpl. The

Python/pystate.c

@@ -1524,10 +1524,7 @@ init_threadstate(_PyThreadStateImpl *_tstate,
 
     _tstate->asyncio_running_loop = NULL;
     _tstate->asyncio_running_task = NULL;
-
 #ifdef _Py_TIER2
-    _tstate->jit_tracer_state.code_buffer = NULL;
-
     // Initialize JIT metrics from environment variables
     _tstate->jit_metrics.jump_backward_initial_value = JUMP_BACKWARD_INITIAL_VALUE;
     _tstate->jit_metrics.jump_backward_initial_backoff = JUMP_BACKWARD_INITIAL_BACKOFF;
@@ -1565,6 +1562,7 @@ init_threadstate(_PyThreadStateImpl *_tstate,
             _tstate->jit_metrics.side_exit_initial_backoff = (uint16_t)value;
         }
     }
+    _tstate->jit_tracer_state.code_buffer = NULL;
 #endif
     tstate->delete_later = NULL;
 

Python/specialize.c

@@ -47,11 +47,9 @@ _PyCode_Quicken(_Py_CODEUNIT *instructions, Py_ssize_t size, int enable_counters
     #if ENABLE_SPECIALIZATION_FT
     _Py_BackoffCounter jump_counter, adaptive_counter;
     if (enable_counters) {
-        PyThreadState *tstate = _PyThreadState_GET();
-        _PyThreadStateImpl *tstate_impl = (_PyThreadStateImpl *)tstate;
         jump_counter = initial_jump_backoff_counter(
-            tstate_impl->jit_metrics.jump_backward_initial_value,
-            tstate_impl->jit_metrics.jump_backward_initial_backoff);
+            JUMP_BACKWARD_INITIAL_VALUE,
+            JUMP_BACKWARD_INITIAL_BACKOFF);
         adaptive_counter = adaptive_counter_warmup();
     }
     else {