stdlib: Mark `abort` as `cold`

This helps HotColdSplitting in GCC/LLVM.

Thought about doing `exit` as well since its only called once per
process, but since its easy to imagine a hot path leading into
`exit(0)`, its less clear if its profitable.

Reviewed-by: Carlos O'Donell <carlos@redhat.com>

diff --git a/stdlib/stdlib.h b/stdlib/stdlib.h
index 901926e8930e305178a06ef11952a7d66814db7a..17487c664055e585439e63843f4b0a6baac3fb5e 100644 (file)
--- a/stdlib/stdlib.h
+++ b/stdlib/stdlib.h
@@ -727,7 +727,7 @@ extern void *aligned_alloc (size_t __alignment, size_t __size)
 #endif
 
 /* Abort execution and generate a core-dump.  */
-extern void abort (void) __THROW __attribute__ ((__noreturn__));
+extern void abort (void) __THROW __attribute__ ((__noreturn__)) __COLD;
 
 
 /* Register a function to be called when `exit' is called.  */