[libc] Expand usage of libc null checks. (#116262)

Fixes #111546

---------

Co-authored-by: alyyelashram <150528548+alyyelashram@users.noreply.github.com>

1 files changed, 2 insertions, 0 deletions

diff --git a/libc/src/string/strcpy.cpp b/libc/src/string/strcpy.cpp
index 60b73ab3aa82..2013593db24a 100644
--- a/libc/src/string/strcpy.cpp
+++ b/libc/src/string/strcpy.cpp
@@ -8,6 +8,7 @@
 
 #include "src/string/strcpy.h"
 #include "src/__support/macros/config.h"
+#include "src/__support/macros/null_check.h"
 #include "src/string/memory_utils/inline_memcpy.h"
 #include "src/string/string_utils.h"
 
@@ -17,6 +18,7 @@ namespace LIBC_NAMESPACE_DECL {
 
 LLVM_LIBC_FUNCTION(char *, strcpy,
                    (char *__restrict dest, const char *__restrict src)) {
+  LIBC_CRASH_ON_NULLPTR(dest);
   size_t size = internal::string_length(src) + 1;
   inline_memcpy(dest, src, size);
   return dest;