[libc-commits] [libc] [libc] add basic lifetime annotations for support data structures (PR #145933)

[Michael Jones via libc-commits]

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@@ -91,4 +91,28 @@ LIBC_THREAD_MODE_EXTERNAL.
 #define LIBC_NO_SANITIZE_OOB_ACCESS
 #endif
 
+#if __has_attribute(lifetimebound)
+#define LIBC_LIFETIMEBOUND [[clang::lifetimebound]]
+#else
+#define LIBC_LIFETIMEBOUND
+#endif
+
+#if __has_attribute(lifetime_capture_by)
+#define LIBC_LIFETIME_CAPTURE_BY(X) [[clang::lifetime_capture_by(X)]]
+#else
+#define LIBC_LIFETIME_CAPTURE_BY(X)
+#endif
+
+#if defined(__clang__)
+#define LIBC_GSL_POINTER [[gsl::Pointer]]
+#else
+#define LIBC_GSL_POINTER
+#endif
+
+#if defined(__clang__)
+#define LIBC_GSL_OWNER [[gsl::Owner]]
+#else
+#define LIBC_GSL_OWNER
+#endif
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michaelrj-google wrote:

if you want people to use these you should add comments to this file either explaining what they mean or linking to the clang docs on what they mean.

https://github.com/llvm/llvm-project/pull/145933