1 files changed, 23 insertions, 1 deletions
diff --git a/Include/internal/pycore_interp_structs.h b/Include/internal/pycore_interp_structs.h
index af6ee3ab489..f1f427d99de 100644
--- a/Include/internal/pycore_interp_structs.h
+++ b/Include/internal/pycore_interp_structs.h
@@ -159,10 +159,11 @@ struct atexit_state {
 typedef struct {
     // Tagged pointer to next object in the list.
     // 0 means the object is not tracked
-    uintptr_t _gc_next;
+    _Py_ALIGNED_DEF(_PyObject_MIN_ALIGNMENT, uintptr_t) _gc_next;
 
     // Tagged pointer to previous object in the list.
     // Lowest two bits are used for flags documented later.
+    // Those bits are made available by the struct's minimum alignment.
     uintptr_t _gc_prev;
 } PyGC_Head;
 
@@ -245,6 +246,16 @@ struct _gc_runtime_state {
 
     /* True if gc.freeze() has been used. */
     int freeze_active;
+
+    /* Memory usage of the process (RSS + swap) after last GC. */
+    Py_ssize_t last_mem;
+
+    /* This accumulates the new object count whenever collection is deferred
+       due to the RSS increase condition not being meet.  Reset on collection. */
+    Py_ssize_t deferred_count;
+
+    /* Mutex held for gc_should_collect_mem_usage(). */
+    PyMutex mutex;
 #endif
 };
 
@@ -667,8 +678,11 @@ struct _Py_interp_cached_objects {
 
     /* object.__reduce__ */
     PyObject *objreduce;
+#ifndef Py_GIL_DISABLED
+    /* resolve_slotdups() */
     PyObject *type_slots_pname;
     pytype_slotdef *type_slots_ptrs[MAX_EQUIV];
+#endif
 
     /* TypeVar and related types */
     PyTypeObject *generic_type;
@@ -716,6 +730,10 @@ typedef struct _PyIndexPool {
 
     // Next index to allocate if no free indices are available
     int32_t next_index;
+
+    // Generation counter incremented on thread creation/destruction
+    // Used for TLBC cache invalidation in remote debugging
+    uint32_t tlbc_generation;
 } _PyIndexPool;
 
 typedef union _Py_unique_id_entry {
@@ -833,6 +851,8 @@ struct _is {
     /* The per-interpreter GIL, which might not be used. */
     struct _gil_runtime_state _gil;
 
+    uint64_t _code_object_generation;
+
      /* ---------- IMPORTANT ---------------------------
      The fields above this line are declared as early as
      possible to facilitate out-of-process observability
@@ -923,6 +943,8 @@ struct _is {
     PyObject *common_consts[NUM_COMMON_CONSTANTS];
     bool jit;
     struct _PyExecutorObject *executor_list_head;
+    struct _PyExecutorObject *executor_deletion_list_head;
+    int executor_deletion_list_remaining_capacity;
     size_t trace_run_counter;
     _rare_events rare_events;
     PyDict_WatchCallback builtins_dict_watcher;