compiler-rt/test/asan/TestCases/printf-3.c

   1 // RUN: %clang_asan -O2 %s -o %t
   2 // RUN: %env_asan_opts=check_printf=1 not %run %t 2>&1 | FileCheck --check-prefix=CHECK-ON %s
   3 // RUN: %env_asan_opts=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: target={{.*windows-(msvc.*|gnu)}}
   8
   9 // New Bionic rejects %n
  10 // https://android.googlesource.com/platform/bionic/+/41398d03b7e8e0dfb951660ae713e682e9fc0336
  11 // UNSUPPORTED: android
  12
  13 #include <stdio.h>
  14 int main() {
  15 #ifdef _MSC_VER
  16   // FIXME: The test raises a dialog even though it's XFAILd.
  17   return 42;
  18 #endif
  19   volatile char c = '0';
  20   volatile int x = 12;
  21   volatile float f = 1.239;
  22   volatile char s[] = "34";
  23   volatile int n[1];
  24   printf("%c %d %.3f %s%n\n", c, x, f, s, &n[1]);
  25   return 0;
  26   // Check that %n is sanitized.
  27   // CHECK-ON: stack-buffer-overflow
  28   // CHECK-ON-NOT: 0 12 1.239 34
  29   // CHECK-OFF: 0 12 1.239 34
  30 }