xref: /llvm-project/clang/test/SemaCXX/warn-unsafe-buffer-usage-pragma-pch.cpp (revision 2e7b95e4c080426e5085c38cec01176b56798534)
1 // The original example from https://github.com/llvm/llvm-project/issues/90501
2 
3 // Test without PCH
4 // RUN: %clang_cc1 -Wno-unused-value -Wunsafe-buffer-usage -std=c++20 -include %s -verify %s
5 // Test with PCH
6 // RUN: %clang_cc1 -Wno-unused-value -std=c++20 -emit-pch -o %t %s
7 // RUN: %clang_cc1 -Wno-unused-value -Wunsafe-buffer-usage -std=c++20 -include-pch %t -verify %s
8 
9 #ifndef A_H
10 #define A_H
11 
a(int * s)12 int a(int *s) {
13   s[2];  // <- expected warning here
14 #pragma clang unsafe_buffer_usage begin
15   return s[1];
16 #pragma clang unsafe_buffer_usage end
17 }
18 
19 #else
20 // expected-warning@-7{{unsafe buffer access}}
21 // expected-note@-8{{pass -fsafe-buffer-usage-suggestions to receive code hardening suggestions}}
main()22 int main() {
23   int s[] = {1, 2, 3};
24   return a(s);
25 }
26 
27 #endif
28