compiler-rt/test/asan/TestCases/printf-4.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: not %run %t 2>&1 | FileCheck --check-prefix=CHECK-ON %s
   4
   5 // FIXME: sprintf is not intercepted on Windows yet. But this test can
   6 // pass if sprintf calls memmove, which is intercepted, so we can't XFAIL it.
   7 // UNSUPPORTED: target={{.*windows-msvc.*}}
   8
   9 #include <stdio.h>
  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 char buf[2];
  16   fputs("before sprintf\n", stderr);
  17   sprintf((char *)buf, "%c %d %.3f %s\n", c, x, f, s);
  18   fputs("after sprintf", stderr);
  19   fputs((const char *)buf, stderr);
  20   return 0;
  21   // Check that size of output buffer is sanitized.
  22   // CHECK-ON: before sprintf
  23   // CHECK-ON-NOT: after sprintf
  24   // CHECK-ON: stack-buffer-overflow
  25   // CHECK-ON-NOT: 0 12 1.239 34
  26 }