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// RUN: %clang_cc1 -std=c++20 -Wno-everything -Wunsafe-buffer-usage \
// RUN: -fsafe-buffer-usage-suggestions \
// RUN: -verify %s
// CHECK-NOT: [-Wunsafe-buffer-usage]
void foo(unsigned idx) {
int buffer[10]; // expected-warning{{'buffer' is an unsafe buffer that does not perform bounds checks}}
// expected-note@-1{{change type of 'buffer' to 'std::array' to label it for hardening}}
buffer[idx] = 0; // expected-note{{used in buffer access here}}
}
int global_buffer[10]; // expected-warning{{'global_buffer' is an unsafe buffer that does not perform bounds checks}}
void foo2(unsigned idx) {
global_buffer[idx] = 0; // expected-note{{used in buffer access here}}
}
struct Foo {
int member_buffer[10];
};
void foo2(Foo& f, unsigned idx) {
f.member_buffer[idx] = 0; // expected-warning{{unsafe buffer access}}
}
void constant_idx_safe(unsigned idx) {
int buffer[10];
buffer[9] = 0;
}
void constant_idx_safe0(unsigned idx) {
int buffer[10];
buffer[0] = 0;
}
void constant_idx_unsafe(unsigned idx) {
int buffer[10]; // expected-warning{{'buffer' is an unsafe buffer that does not perform bounds checks}}
// expected-note@-1{{change type of 'buffer' to 'std::array' to label it for hardening}}
buffer[10] = 0; // expected-note{{used in buffer access here}}
}
void constant_id_string(unsigned idx) {
char safe_char = "abc"[1]; // no-warning
safe_char = ""[0];
safe_char = "\0"[0];
char abcd[5] = "abc";
abcd[2]; // no-warning
char unsafe_char = "abc"[3];
unsafe_char = "abc"[-1]; //expected-warning{{unsafe buffer access}}
unsafe_char = ""[1]; //expected-warning{{unsafe buffer access}}
unsafe_char = ""[idx]; //expected-warning{{unsafe buffer access}}
}
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