src/compiler-rt/test/asan/TestCases/printf-5.c

   1 // RUN: %clang_asan -O2 %s -o %t
   2 // We need replace_intrin=0 to avoid reporting errors in memcpy.
   3 // RUN: %env_asan_opts=replace_intrin=0:check_printf=1 not %run %t 2>&1 | FileCheck --check-prefix=CHECK-ON %s
   4 // RUN: %env_asan_opts=replace_intrin=0:check_printf=0 %run %t 2>&1 | FileCheck --check-prefix=CHECK-OFF %s
   5 // RUN: %env_asan_opts=replace_intrin=0 not %run %t 2>&1 | FileCheck --check-prefix=CHECK-ON %s
   6
   7 // FIXME: printf is not intercepted on Windows yet.
   8 // XFAIL: win32
   9
  10 #include <stdio.h>
  11 #include <string.h>
  12 int main() {
  13   volatile char c = '0';
  14   volatile int x = 12;
  15   volatile float f = 1.239;
  16   volatile char s[] = "34";
  17   volatile char fmt[2];
  18   memcpy((char *)fmt, "%c %d %f %s\n", sizeof(fmt));
  19   printf((char *)fmt, c, x, f, s);
  20   return 0;
  21   // Check that format string is sanitized.
  22   // CHECK-ON: stack-buffer-overflow
  23   // CHECK-ON-NOT: 0 12 1.239 34
  24   // CHECK-OFF: 0
  25 }