From 1caa970b32f931f0ea65df8e63d3bbc1ae2bc28e Mon Sep 17 00:00:00 2001
From: alperyoney <alperyoney@fb.com>
Date: Thu, 4 Sep 2025 08:05:03 -0700
Subject: [PATCH 1/2] gh-116738: Test resource module on FT Python build

---
 Lib/test/test_free_threading/test_resource.py | 41 +++++++++++++++++++
 Modules/resource.c                            |  6 +--
 2 files changed, 44 insertions(+), 3 deletions(-)
 create mode 100644 Lib/test/test_free_threading/test_resource.py

diff --git a/Lib/test/test_free_threading/test_resource.py b/Lib/test/test_free_threading/test_resource.py
new file mode 100644
index 00000000000000..ecd0e535c442b4
--- /dev/null
+++ b/Lib/test/test_free_threading/test_resource.py
@@ -0,0 +1,41 @@
+import unittest
+from test.support import import_helper, threading_helper
+
+resource = import_helper.import_module("resource")
+
+
+NTHREADS = 10
+LOOP_PER_THREAD = 1000
+
+
+@threading_helper.requires_working_threading()
+class ResourceTest(unittest.TestCase):
+    @unittest.skipUnless(hasattr(resource, "getrusage"), "needs getrusage")
+    @unittest.skipUnless(
+        hasattr(resource, "RUSAGE_THREAD"), "needs RUSAGE_THREAD"
+    )
+    def test_getrusage(self):
+        ru_utime_lst = []
+
+        def dummy_work(ru_utime_lst):
+            for _ in range(LOOP_PER_THREAD):
+                pass
+
+            usage_process = resource.getrusage(resource.RUSAGE_SELF)
+            usage_thread = resource.getrusage(resource.RUSAGE_THREAD)
+            # Process user time should be greater than thread user time
+            self.assertGreater(usage_process.ru_utime, usage_thread.ru_utime)
+            ru_utime_lst.append(usage_thread.ru_utime)
+
+        threading_helper.run_concurrently(
+            worker_func=dummy_work, args=(ru_utime_lst,), nthreads=NTHREADS
+        )
+
+        usage_process = resource.getrusage(resource.RUSAGE_SELF)
+        self.assertEqual(len(ru_utime_lst), NTHREADS)
+        # Process user time should be greater than sum of all thread user times
+        self.assertGreater(usage_process.ru_utime, sum(ru_utime_lst))
+
+
+if __name__ == "__main__":
+    unittest.main()
diff --git a/Modules/resource.c b/Modules/resource.c
index a463355f424d48..b3f4f6c5598599 100644
--- a/Modules/resource.c
+++ b/Modules/resource.c
@@ -364,10 +364,10 @@ resource_getpagesize_impl(PyObject *module)
 /*[clinic end generated code: output=9ba93eb0f3d6c3a9 input=546545e8c1f42085]*/
 {
     long pagesize = 0;
-#if defined(HAVE_GETPAGESIZE)
-    pagesize = getpagesize();
-#elif defined(HAVE_SYSCONF) && defined(_SC_PAGE_SIZE)
+#if defined(HAVE_SYSCONF) && defined(_SC_PAGE_SIZE)
     pagesize = sysconf(_SC_PAGE_SIZE);
+#elif defined(HAVE_GETPAGESIZE)
+    pagesize = getpagesize();
 #else
 #   error "unsupported platform: resource.getpagesize()"
 #endif

From 7ab0c233120a3af0a8ff37c3f4814f7364090282 Mon Sep 17 00:00:00 2001
From: alperyoney <alperyoney@fb.com>
Date: Mon, 8 Sep 2025 09:47:36 -0700
Subject: [PATCH 2/2] gh-116738: Remove pagesize() change

---
 Modules/resource.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/Modules/resource.c b/Modules/resource.c
index b3f4f6c5598599..a463355f424d48 100644
--- a/Modules/resource.c
+++ b/Modules/resource.c
@@ -364,10 +364,10 @@ resource_getpagesize_impl(PyObject *module)
 /*[clinic end generated code: output=9ba93eb0f3d6c3a9 input=546545e8c1f42085]*/
 {
     long pagesize = 0;
-#if defined(HAVE_SYSCONF) && defined(_SC_PAGE_SIZE)
-    pagesize = sysconf(_SC_PAGE_SIZE);
-#elif defined(HAVE_GETPAGESIZE)
+#if defined(HAVE_GETPAGESIZE)
     pagesize = getpagesize();
+#elif defined(HAVE_SYSCONF) && defined(_SC_PAGE_SIZE)
+    pagesize = sysconf(_SC_PAGE_SIZE);
 #else
 #   error "unsupported platform: resource.getpagesize()"
 #endif