Re-sync with internal repository

The internal and external repositories are out of sync. This Pull Request attempts to brings them back in sync by patching the GitHub repository. Please carefully review this patch. You must disable ShipIt for your project in order to merge this pull request. DO NOT IMPORT this pull request. Instead, merge it directly on GitHub using the MERGE BUTTON. Re-enable ShipIt after merging.

fbshipit-source-id: b65f103f320570ce1830743524ebd37b97374a04

Author: facebook-github-bot

.github/dependabot.yml

@@ -4,7 +4,7 @@ on:
   workflow_dispatch:
   push:
     branches:
-    - 'main'
+    - 'meta/main'
     - '3.*'
   pull_request:
     branches:

.github/workflows/build.yml

@@ -343,6 +343,55 @@ extern void _PyGC_VisitObjectsWorldStopped(PyInterpreterState *interp,
                                            gcvisitobjects_t callback, void *arg);
 #endif
 
+struct _Ci_PyGCImpl;
+
+/*
+ * Collect cyclic garbage.
+ *
+ * impl           - Pointer to the collection implementation.
+ * tstate         - Indirectly specifies (via tstate->interp) the interpreter
+                    for which collection should be performed.
+ * generation     - Collect generations <= this value
+ * reason         - Why we're collecting
+ */
+typedef Py_ssize_t (*Ci_gc_collect_t)(struct _Ci_PyGCImpl *impl, PyThreadState* tstate,
+                                      int generation, _PyGC_Reason reason);
+
+// Free a collector
+typedef void (*Ci_gc_finalize_t)(struct _Ci_PyGCImpl *impl);
+
+// An implementation of cyclic garbage collection
+typedef struct _Ci_PyGCImpl {
+    Ci_gc_collect_t collect;
+    Ci_gc_finalize_t finalize;
+} _Ci_PyGCImpl;
+
+struct _gc_runtime_state;
+
+/*
+ * Set the collection implementation.
+ *
+ * The callee takes ownership of impl.
+ *
+ * Returns a pointer to the previous impl, which the caller is responsible for freeing
+ * using the returned impl's finalize().
+ */
+PyAPI_FUNC(_Ci_PyGCImpl *) _Ci_PyGC_SetImpl(struct _gc_runtime_state *gc_state, _Ci_PyGCImpl *impl);
+
+/*
+ * Returns a pointer to the current GC implementation but does not transfer
+ * ownership to the caller.
+ */
+PyAPI_FUNC(_Ci_PyGCImpl *) _Ci_PyGC_GetImpl(struct _gc_runtime_state *gc_state);
+
+/*
+ * Clear free lists (e.g. frames, tuples, etc.) for the given interpreter.
+ *
+ * This should be called by GC implementations after collecting the highest
+ * generation.
+ */
+PyAPI_FUNC(void) _Ci_PyGC_ClearFreeLists(PyInterpreterState* interp);
+
 #ifdef __cplusplus
 }
 #endif

Include/internal/pycore_gc.h

@@ -90,7 +90,13 @@ _Py_ThreadCanHandleSignals(PyInterpreterState *interp)
    and interpreter state */
 
 #if !defined(Py_BUILD_CORE_MODULE)
+#  if defined(Py_ENABLE_SHARED) && _Py__has_attribute(tls_model)
+__attribute__((tls_model("initial-exec")))
+#  endif
 extern _Py_thread_local PyThreadState *_Py_tss_tstate;
+#  if defined(Py_ENABLE_SHARED) && _Py__has_attribute(tls_model)
+__attribute__((tls_model("initial-exec")))
+#  endif
 extern _Py_thread_local PyInterpreterState *_Py_tss_interp;
 #endif
 

Include/internal/pycore_pystate.h

@@ -27,7 +27,7 @@
 #define PY_RELEASE_SERIAL       0
 
 /* Version as a string */
-#define PY_VERSION              "3.16.0a0"
+#define PY_VERSION              "3.16.0a0+meta"
 /*--end constants--*/
 
 

Include/patchlevel.h

@@ -119,6 +119,8 @@ PyAPI_FUNC(void) PyGILState_Release(PyGILState_STATE);
 */
 PyAPI_FUNC(PyThreadState *) PyGILState_GetThisThreadState(void);
 
+// Sets the thread state for multi-threaded GC
+PyAPI_FUNC(void) Ci_SetTStateForGC(PyThreadState *tstate);
 
 /* PEP 788 -- Protection against interpreter finalization */
 

Include/pystate.h

@@ -1023,6 +1023,15 @@ def main():
     sethelper()
     if not sys.flags.isolated:
         enablerlcompleter()
+    # If we've been built with CinderX support there will be an init_cinderx.py
+    # included in the default module search path. In this case we import it
+    # which will have the side-effect of initializing CinderX. If this module
+    # is missing then we weren't build with CinderX so ignoring the import
+    # error is fine.
+    try:
+        import init_cinderx
+    except ImportError:
+        pass
     execsitecustomize()
     if ENABLE_USER_SITE:
         execusercustomize()