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

   1 // RUN: %clang -shared -fPIC -D_DSO -O2 -D_FORTIFY_SOURCE=2 %s -o %t.so
   2 // RUN: %clang_asan %s -o %t %t.so
   3 // RUN: not %run %t 2>&1 | FileCheck %s
   4 // REQUIRES: glibc-2.27
   5 #ifdef _DSO
   6 #include <stdarg.h>
   7 #include <stdio.h>
   8 #include <stdlib.h>
   9 #include <string.h>
  10 __attribute__((noinline)) char foo(const char *format, ...) {
  11   char *write_buffer = (char *)malloc(1);
  12   va_list ap;
  13   va_start(ap, format);
  14   // CHECK: AddressSanitizer: heap-buffer-overflow
  15   vsprintf(write_buffer, format, ap);
  16   va_end(ap);
  17   return write_buffer[0];
  18 }
  19 #else
  20 extern int foo(const char *format, ...);
  21 int main() { return foo("%s_%s", "one", "two"); }
  22 #endif