[clang] [Clang][Sema] Add fortify warnings for bcopy and bzero (#168965) (PR #186522)

[via cfe-commits]

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@@ -508,7 +508,8 @@ void bcopy2 (void) {
   char src[] = {1, 2, 3, 4};
   char dst[1];
 
-  bcopy(src, dst, 4); // expected-warning{{overflow}}
+  bcopy(src, dst, 4); // expected-warning {{Memory copy function overflows the destination buffer}}
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bharsesh wrote:

bstring.c is an analyzer test (it is run with %clang_analyze_cc1 and the unix.cstring checker enabled), so you get the analyzer message (createOutOfBoundErrorMsg in clang/lib/StaticAnalyzer/Checkers/CStringChecker.cpp), and also see the frontend fortify warning. The other test file is Sema only test, so we see only the fortify warning.

https://github.com/llvm/llvm-project/pull/186522