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1 // RUN: %clang_asan -O2 %s -o %t
2 // RUN: env ASAN_OPTIONS=check_printf=1 not %run %t 2>&1 | FileCheck --check-prefix=CHECK-ON %s
3 // RUN: env ASAN_OPTIONS=check_printf=0 %run %t 2>&1 | FileCheck --check-prefix=CHECK-OFF %s
4 // RUN: not %run %t 2>&1 | FileCheck --check-prefix=CHECK-ON %s
5 
6 // FIXME: printf is not intercepted on Windows yet.
7 // XFAIL: win32
8 
9 #include <stdio.h>
main()10 int main() {
11   volatile char c = '0';
12   volatile int x = 12;
13   volatile float f = 1.239;
14   volatile char s[] = "34";
15   volatile int n[1];
16   printf("%c %d %.3f %s%n\n", c, x, f, s, &n[1]);
17   return 0;
18   // Check that %n is sanitized.
19   // CHECK-ON: stack-buffer-overflow
20   // CHECK-ON-NOT: 0 12 1.239 34
21   // CHECK-OFF: 0 12 1.239 34
22 }
23