1 files changed, 23 insertions, 0 deletions
diff --git a/contrib/python/cryptography/next/rust/msan.cpp b/contrib/python/cryptography/next/rust/msan.cpp
new file mode 100644
index 00000000000..c653958f4b0
--- /dev/null
+++ b/contrib/python/cryptography/next/rust/msan.cpp
@@ -0,0 +1,23 @@
+#include <stdint.h>
+#include <cstddef>
+
+typedef size_t uptr;
+typedef uint32_t u32;
+
+// defined in clang{XX}-rt/msan
+extern "C" void __msan_set_alloca_origin_with_descr(void *a, uptr size, u32 *id_ptr, char *descr);
+extern "C" void __msan_unpoison(void *a, uptr size);
+
+
+extern "C" void __safe_msan_set_alloca_origin_with_descr(void *a, uptr size, u32 *id_ptr, char *descr) {
+  __msan_set_alloca_origin_with_descr(a, size, id_ptr, descr);
+  __msan_unpoison(a, size);
+}
+
+
+extern "C" void* malloc(size_t size);
+extern "C" void *__safe_malloc(size_t size) {
+    void* ret = malloc(size);
+    __msan_unpoison(ret, size);
+    return ret;
+}