diff options
Diffstat (limited to 'libc/src/string/strncpy.cpp')
| -rw-r--r-- | libc/src/string/strncpy.cpp | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/libc/src/string/strncpy.cpp b/libc/src/string/strncpy.cpp index 4976ad94708c..e271009502f2 100644 --- a/libc/src/string/strncpy.cpp +++ b/libc/src/string/strncpy.cpp @@ -10,6 +10,7 @@ #include "src/__support/common.h" #include "src/__support/macros/config.h" +#include "src/__support/macros/null_check.h" #include <stddef.h> // For size_t. namespace LIBC_NAMESPACE_DECL { @@ -17,6 +18,10 @@ namespace LIBC_NAMESPACE_DECL { LLVM_LIBC_FUNCTION(char *, strncpy, (char *__restrict dest, const char *__restrict src, size_t n)) { + if (n) { + LIBC_CRASH_ON_NULLPTR(dest); + LIBC_CRASH_ON_NULLPTR(src); + } size_t i = 0; // Copy up until \0 is found. for (; i < n && src[i] != '\0'; ++i) |