From bce9811abab7840e2784bf943ba8a2ae5ea10d30 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Ludvig=20Gunne=20Lindstr=C3=B6m?=
 <ludviggunnelindstrom@gmail.com>
Date: Mon, 27 Jul 2026 14:07:08 +0200
Subject: [PATCH 1/2] add test

---
 test/cfg/windows.cpp | 22 ++++++++++++++++++++++
 1 file changed, 22 insertions(+)

diff --git a/test/cfg/windows.cpp b/test/cfg/windows.cpp
index c01e57f6f91..37c580a0134 100644
--- a/test/cfg/windows.cpp
+++ b/test/cfg/windows.cpp
@@ -23,6 +23,7 @@
 #include <wchar.h>
 #include <atlstr.h>
 #include <string>
+#include <locale.h>
 
 bool UpdateTraceACalled(TRACEHANDLE traceHandle, LPCSTR loggerName, EVENT_TRACE_PROPERTIES* pProperties)
 {
@@ -615,6 +616,27 @@ void memleak_malloca()
     // cppcheck-suppress memleak
 }
 
+void memleak_create_locale()
+{
+    // cppcheck-suppress-begin valueFlowBailoutIncompleteVar
+    _locale_t locale = _create_locale(LC_ALL, "C");
+    _locale_t wlocale = _wcreate_locale(LC_ALL, L"C");
+    (void) locale;
+    (void) wlocale;
+    // cppcheck-suppress-end valueFlowBailoutIncompleteVar
+    // cppcheck-suppress memleak
+}
+
+void no_memleak_create_locale()
+{
+    // cppcheck-suppress-begin valueFlowBailoutIncompleteVar
+    _locale_t locale = _create_locale(LC_ALL, "C");
+    _locale_t wlocale = _wcreate_locale(LC_ALL, L"C");
+    _free_locale(locale);
+    _free_locale(wlocale);
+    // cppcheck-suppress-end valueFlowBailoutIncompleteVar
+}
+
 void memleak_AllocateAndInitializeSid()
 {
     PSID pEveryoneSID = NULL;

From 4d2c57614d95bc96dbc471374374c591b0d71803 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Ludvig=20Gunne=20Lindstr=C3=B6m?=
 <ludviggunnelindstrom@gmail.com>
Date: Mon, 27 Jul 2026 13:58:58 +0200
Subject: [PATCH 2/2] fix

---
 cfg/windows.cfg | 37 +++++++++++++++++++++++++++++++++++++
 1 file changed, 37 insertions(+)

diff --git a/cfg/windows.cfg b/cfg/windows.cfg
index 6a0bd111afa..b2251900d42 100644
--- a/cfg/windows.cfg
+++ b/cfg/windows.cfg
@@ -1331,6 +1331,11 @@
     <alloc init="true" arg="11">AllocateAndInitializeSid</alloc>
     <dealloc>FreeSid</dealloc>
   </memory>
+  <memory>
+    <alloc init="true">_create_locale</alloc>
+    <alloc init="true">_wcreate_locale</alloc>
+    <dealloc>_free_locale</dealloc>
+  </memory>
   <!--SIZE_T RtlCompareMemory(
   _In_ const VOID   *Source1,
   _In_ const VOID   *Source2,
@@ -5591,6 +5596,38 @@ HFONT CreateFont(
       <not-uninit/>
     </arg>
   </function>
+  <!--_locale_t _create_locale(int category, const char *locale);
+      _locale_t _wcreate_locale(int category, const wchar_t *locale);
+      void _free_locale(_locale_t locale);-->
+  <function name="_create_locale">
+    <returnValue type="_locale_t"/>
+    <noreturn>false</noreturn>
+    <use-retval/>
+    <arg nr="1" direction="in">
+      <not-uninit/>
+    </arg>
+    <arg nr="2" direction="in">
+      <not-uninit/>
+    </arg>
+  </function>
+  <function name="_wcreate_locale">
+    <returnValue type="_locale_t"/>
+    <noreturn>false</noreturn>
+    <use-retval/>
+    <arg nr="1" direction="in">
+      <not-uninit/>
+    </arg>
+    <arg nr="2" direction="in">
+      <not-uninit/>
+    </arg>
+  </function>
+  <function name="_free_locale">
+    <noreturn>false</noreturn>
+    <returnValue type="void"/>
+    <arg nr="1">
+      <not-uninit/>
+    </arg>
+  </function>
   <!--char * strlwr(_Inout_z_ char * _Str);-->
   <function name="strlwr">
     <returnValue type="char *">arg1</returnValue>