From b15d04cc1cd4f9c082a6a24b9c832b49d85968b6 Mon Sep 17 00:00:00 2001
From: cocolato <haiizhu@outlook.com>
Date: Tue, 20 Jan 2026 22:41:02 +0800
Subject: [PATCH 1/2] fix JIT tracer memory leak when daemon thread exits

---
 Lib/test/test_capi/test_opt.py | 23 +++++++++++++++++++++++
 Python/pystate.c               |  4 ++++
 2 files changed, 27 insertions(+)

diff --git a/Lib/test/test_capi/test_opt.py b/Lib/test/test_capi/test_opt.py
index 79c7f530b8ae89..8cf529c6eb4439 100644
--- a/Lib/test/test_capi/test_opt.py
+++ b/Lib/test/test_capi/test_opt.py
@@ -3792,6 +3792,29 @@ def __next__(self):
         """), PYTHON_JIT="1", PYTHON_JIT_STRESS="1")
         self.assertEqual(result[0].rc, 0, result)
 
+    def test_144068_daemon_thread_jit_cleanup(self):
+        result = script_helper.run_python_until_end('-c', textwrap.dedent("""
+        import threading
+        import time
+
+        def hot_loop():
+            end = time.time() + 5.0
+            while time.time() < end:
+                pass
+
+        # Create a daemon thread that will be abandoned at shutdown
+        t = threading.Thread(target=hot_loop, daemon=True)
+        t.start()
+
+        time.sleep(0.1)
+        """), PYTHON_JIT="1", ASAN_OPTIONS="detect_leaks=1")
+        self.assertEqual(result[0].rc, 0, result)
+        stderr = result[0].err.decode('utf-8', errors='replace')
+        self.assertNotIn('LeakSanitizer', stderr,
+                         f"Memory leak detected by ASan:\n{stderr}")
+        self.assertNotIn('_PyJit_TryInitializeTracing', stderr,
+                         f"JIT tracer memory leak detected:\n{stderr}")
+
 def global_identity(x):
     return x
 
diff --git a/Python/pystate.c b/Python/pystate.c
index 86dee70734a097..0993f9f906153d 100644
--- a/Python/pystate.c
+++ b/Python/pystate.c
@@ -1836,6 +1836,10 @@ PyThreadState_Clear(PyThreadState *tstate)
 
     _PyThreadState_ClearMimallocHeaps(tstate);
 
+#ifdef _Py_TIER2
+    _PyJit_TracerFree((_PyThreadStateImpl *)tstate);
+#endif
+
     tstate->_status.cleared = 1;
 
     // XXX Call _PyThreadStateSwap(runtime, NULL) here if "current".

From ffd281a66421d554da44f98b855e52475ef6822f Mon Sep 17 00:00:00 2001
From: "blurb-it[bot]" <43283697+blurb-it[bot]@users.noreply.github.com>
Date: Wed, 21 Jan 2026 02:30:07 +0000
Subject: [PATCH 2/2] =?UTF-8?q?=F0=9F=93=9C=F0=9F=A4=96=20Added=20by=20blu?=
 =?UTF-8?q?rb=5Fit.?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 .../2026-01-21-02-30-06.gh-issue-144068.9TTu7v.rst               | 1 +
 1 file changed, 1 insertion(+)
 create mode 100644 Misc/NEWS.d/next/Core_and_Builtins/2026-01-21-02-30-06.gh-issue-144068.9TTu7v.rst

diff --git a/Misc/NEWS.d/next/Core_and_Builtins/2026-01-21-02-30-06.gh-issue-144068.9TTu7v.rst b/Misc/NEWS.d/next/Core_and_Builtins/2026-01-21-02-30-06.gh-issue-144068.9TTu7v.rst
new file mode 100644
index 00000000000000..b3e5db64a368b3
--- /dev/null
+++ b/Misc/NEWS.d/next/Core_and_Builtins/2026-01-21-02-30-06.gh-issue-144068.9TTu7v.rst
@@ -0,0 +1 @@
+Fix JIT tracer memory leak, ensure the JIT tracer state is freed when daemon threads are cleaned up during interpreter shutdown.