[UCRT] Import Microsoft.Windows.SDK.CRTSource version 10.0.22621.3

Imported from https://www.nuget.org/packages/Microsoft.Windows.SDK.CRTSource/10.0.22621.3
License: MIT

sdk/lib/ucrt/heap/free.cpp

@@ -0,0 +1,32 @@
+//
+// free.cpp
+//
+//      Copyright (c) Microsoft Corporation. All rights reserved.
+//
+// Implementation of free().
+//
+#include <corecrt_internal.h>
+#include <malloc.h>
+
+// Frees a block in the heap.  The 'block' pointer must either be a null pointer
+// or must point to a valid block in the heap.
+//
+// This function supports patching and therefore must be marked noinline.
+// Both _free_dbg and _free_base must also be marked noinline
+// to prevent identical COMDAT folding from substituting calls to free
+// with either other function or vice versa.
+extern "C" _CRT_HYBRIDPATCHABLE __declspec(noinline) void __cdecl free(void* const block)
+{
+    // Some libraries that hook memory allocation routines (such as libtcmalloc)
+    // look for an appropriate place inside free to place a patch to its version
+    // of free. Without these extra instructions padding the call to _free_base,
+    // some libraries may choose to insert this patch in _free_base instead.
+    volatile int extra_instructions_for_patching_libraries = 0;
+    (void) extra_instructions_for_patching_libraries;
+
+    #ifdef _DEBUG
+    _free_dbg(block, _NORMAL_BLOCK);
+    #else
+    _free_base(block);
+    #endif
+}