[libcxx-commits] [PATCH] D116045: [libc++] Use arc4random instead of /dev/urandom on Apple platforms

[Louis Dionne via Phabricator via libcxx-commits]

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On Apple platforms, arc4random is faster than /dev/urandom, and it is the
recommended user-space RNG according to Apple's own OS folks.

rdar://86638350


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D116045

Files:
  libcxx/include/__config


Index: libcxx/include/__config
===================================================================
--- libcxx/include/__config
+++ libcxx/include/__config
@@ -333,7 +333,7 @@
 #  define _LIBCPP_SHORT_WCHAR   1
 #endif
 
-#if defined(__OpenBSD__)
+#if defined(__OpenBSD__) || defined(__APPLE__)
    // Certain architectures provide arc4random(). Prefer using
    // arc4random() over /dev/{u,}random to make it possible to obtain
    // random data even when using sandboxing mechanisms such as chroots,


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