compiler-rt/test/dfsan/vararg.c

   1 // RUN: %clang_dfsan %s -o %t
   2 // RUN: not %run %t 2>&1 | FileCheck %s
   3 // RUN: %run %t foo
   4
   5 #include <stdio.h>
   6
   7 int do_nothing(const char *format, ...) {
   8   return 0;
   9 }
  10
  11 int main(int argc, char **argv) {
  12   int (*fp)(const char *, ...);
  13
  14   if (argc > 1)
  15     fp = do_nothing;
  16   else
  17     fp = printf;
  18
  19   // CHECK: FATAL: DataFlowSanitizer: unsupported indirect call to vararg function printf
  20   fp("hello %s\n", "world");
  21 }