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 // REQUIRES: x86_64-target-arch
   6
   7 #include <stdio.h>
   8
   9 int do_nothing(const char *format, ...) {
  10   return 0;
  11 }
  12
  13 int main(int argc, char **argv) {
  14   int (*fp)(const char *, ...);
  15
  16   if (argc > 1)
  17     fp = do_nothing;
  18   else
  19     fp = printf;
  20
  21   // CHECK: FATAL: DataFlowSanitizer: unsupported indirect call to vararg function printf
  22   fp("hello %s\n", "world");
  23 }