compiler-rt/test/asan/TestCases/Linux/printf-fortify-2.c

   1 // RUN: %clang -fPIC -shared -O2 -D_FORTIFY_SOURCE=2 -D_DSO %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 <stdio.h>
   7 #include <stdlib.h>
   8 #include <string.h>
   9 __attribute__((noinline)) int foo() {
  10   char *write_buffer = (char *)malloc(1);
  11   // CHECK: AddressSanitizer: heap-buffer-overflow
  12   snprintf(write_buffer, 4096, "%s_%s", "one", "two");
  13   return write_buffer[0];
  14 }
  15 #else
  16 extern int foo();
  17 int main() { return foo(); }
  18 #endif