chore: import upstream snapshot with attribution

vendored/mimalloc/src/static.c

@@ -0,0 +1,43 @@
+/* ----------------------------------------------------------------------------
+Copyright (c) 2018-2020, Microsoft Research, Daan Leijen
+This is free software; you can redistribute it and/or modify it under the
+terms of the MIT license. A copy of the license can be found in the file
+"LICENSE" at the root of this distribution.
+-----------------------------------------------------------------------------*/
+#ifndef _DEFAULT_SOURCE
+#define _DEFAULT_SOURCE
+#endif
+#if defined(__sun)
+// same remarks as os.c for the static's context.
+#undef _XOPEN_SOURCE
+#undef _POSIX_C_SOURCE
+#endif
+
+#include "mimalloc.h"
+#include "mimalloc/internal.h"
+
+// For a static override we create a single object file
+// containing the whole library. If it is linked first
+// it will override all the standard library allocation
+// functions (on Unix's).
+#include "alloc.c"          // includes alloc-override.c and free.c
+#include "alloc-aligned.c"
+#include "alloc-posix.c"
+#include "arena.c"
+#include "arena-meta.c"
+#include "bitmap.c"
+#include "heap.c"
+#include "init.c"
+#include "libc.c"
+#include "options.c"
+#include "os.c"
+#include "page.c"           // includes page-queue.c
+#include "page-map.c"
+#include "random.c"
+#include "stats.c"
+#include "theap.c"
+#include "threadlocal.c"
+#include "prim/prim.c"
+#if MI_OSX_ZONE
+#include "prim/osx/alloc-override-zone.c"
+#endif