[clang] [Clang][Sema] Add fortify warnings for fread, fwrite, and fgets (PR #204337)

[Radovan Božić via cfe-commits]

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@@ -120,6 +126,16 @@ void call_bcopy_bzero(void) {
   __builtin_bzero(dst, 11); // expected-warning {{'bzero' will always overflow; destination buffer has size 10, but size argument is 11}}
 }
 
+void call_fread_fwrite_fgets(FILE *fp) {
+  char src[4];
+  fread(src, 2, 3, fp); // expected-warning {{'fread' will always overflow; destination buffer has size 4, but size argument is 6}}
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bozicrHT wrote:

Added.

https://github.com/llvm/llvm-project/pull/204337