1// RUN: %clang_safestack %s -o %t
2// RUN: %run %t
3
4// RUN: %clang_nosafestack -fno-stack-protector %s -o %t
5// RUN: not %run %t
6
7// Test that buffer overflows on the unsafe stack do not affect variables on the
8// safe stack.
9
10// REQUIRES: stable-runtime
11
12__attribute__((noinline))
13void fct(volatile int *buffer)
14{
15 memset(buffer - 1, 0, 7 * sizeof(int));
16}
17
18int main(int argc, char **argv)
19{
20 int prebuf[7];
21 int value1 = 42;
22 int buffer[5];
23 int value2 = 42;
24 int postbuf[7];
25 fct(prebuf + 1);
26 fct(postbuf + 1);
27 fct(buffer);
28 return value1 != 42 || value2 != 42;
29}
30