From 4e53abb0f4773e1cce68a4f41ddbb43e74364c5f Mon Sep 17 00:00:00 2001
From: Victor Stinner <vstinner@python.org>
Date: Tue, 10 Mar 2020 23:49:16 +0100
Subject: [PATCH] bpo-38631: _PyGILState_Init() returns PyStatus (GH-18908)

_PyGILState_Init() now returns PyStatus rather than calling
Py_FatalError() on failure.
---
 Include/internal/pycore_pylifecycle.h | 2 +-
 Python/pylifecycle.c                  | 5 ++++-
 Python/pystate.c                      | 5 +++--
 3 files changed, 8 insertions(+), 4 deletions(-)

diff --git a/Include/internal/pycore_pylifecycle.h b/Include/internal/pycore_pylifecycle.h
index 2dd6149a6b3..cf228033a72 100644
--- a/Include/internal/pycore_pylifecycle.h
+++ b/Include/internal/pycore_pylifecycle.h
@@ -83,7 +83,7 @@ extern void _PyHash_Fini(void);
 extern void _PyTraceMalloc_Fini(void);
 extern void _PyWarnings_Fini(PyInterpreterState *interp);
 
-extern void _PyGILState_Init(PyThreadState *tstate);
+extern PyStatus _PyGILState_Init(PyThreadState *tstate);
 extern void _PyGILState_Fini(PyThreadState *tstate);
 
 PyAPI_FUNC(void) _PyGC_DumpShutdownStats(PyThreadState *tstate);
diff --git a/Python/pylifecycle.c b/Python/pylifecycle.c
index d00bf821c57..bc32eff436e 100644
--- a/Python/pylifecycle.c
+++ b/Python/pylifecycle.c
@@ -551,7 +551,10 @@ pycore_create_interpreter(_PyRuntimeState *runtime,
     _PyEval_FiniThreads(&runtime->ceval);
 
     /* Auto-thread-state API */
-    _PyGILState_Init(tstate);
+    status = _PyGILState_Init(tstate);
+    if (_PyStatus_EXCEPTION(status)) {
+        return status;
+    }
 
     /* Create the GIL */
     status = _PyEval_InitThreads(tstate);
diff --git a/Python/pystate.c b/Python/pystate.c
index a926e9753cb..504f5f456dd 100644
--- a/Python/pystate.c
+++ b/Python/pystate.c
@@ -1147,7 +1147,7 @@ PyThreadState_IsCurrent(PyThreadState *tstate)
 /* Internal initialization/finalization functions called by
    Py_Initialize/Py_FinalizeEx
 */
-void
+PyStatus
 _PyGILState_Init(PyThreadState *tstate)
 {
     /* must init with valid states */
@@ -1157,13 +1157,14 @@ _PyGILState_Init(PyThreadState *tstate)
     struct _gilstate_runtime_state *gilstate = &tstate->interp->runtime->gilstate;
 
     if (PyThread_tss_create(&gilstate->autoTSSkey) != 0) {
-        Py_FatalError("Could not allocate TSS entry");
+        return _PyStatus_NO_MEMORY();
     }
     gilstate->autoInterpreterState = tstate->interp;
     assert(PyThread_tss_get(&gilstate->autoTSSkey) == NULL);
     assert(tstate->gilstate_counter == 0);
 
     _PyGILState_NoteThreadState(gilstate, tstate);
+    return _PyStatus_OK();
 }
 
 PyInterpreterState *