Fix reading gc_stats according last changes

Author: sergey-miryanov

Modules/_remote_debugging/gc_stats.h

@@ -115,13 +115,22 @@ get_gc_stats_from_interpreter_state(RuntimeOffsets *offsets,
                                     unsigned long iid,
                                     void *context)
 {
-    struct gc_stats stats;
-    uintptr_t gc_stats_address = interpreter_state_addr
+    uintptr_t gc_stats_addr;
+    uintptr_t gc_stats_pointer_address = interpreter_state_addr
         + offsets->debug_offsets.interpreter_state.gc
         + offsets->debug_offsets.gc.generation_stats;
+    if (_Py_RemoteDebug_ReadRemoteMemory(&offsets->handle,
+                                         gc_stats_pointer_address,
+                                         sizeof(gc_stats_addr),
+                                         &gc_stats_addr) < 0) {
+        PyErr_SetString(PyExc_RuntimeError, "Failed to read GC state address");
+        return -1;
+    }
+
+    struct gc_stats stats;
     uint64_t gc_stats_size = offsets->debug_offsets.gc.generation_stats_size;
     if (_Py_RemoteDebug_ReadRemoteMemory(&offsets->handle,
-                                         gc_stats_address,
+                                         gc_stats_addr,
                                          gc_stats_size,
                                          &stats) < 0) {
         PyErr_SetString(PyExc_RuntimeError, "Failed to read GC state");