--- old/src/hotspot/os/linux/os_linux.cpp	2018-10-04 14:38:57.131316193 +0530
+++ new/src/hotspot/os/linux/os_linux.cpp	2018-10-04 14:38:57.003316194 +0530
@@ -5676,10 +5676,16 @@
 // or -1 on failure (e.g. can't fork a new process).
 // Unlike system(), this function can be called from signal handler. It
 // doesn't block SIGINT et al.
-int os::fork_and_exec(char* cmd) {
+int os::fork_and_exec(char* cmd, bool use_vfork_if_available) {
   const char * argv[4] = {"sh", "-c", cmd, NULL};
 
-  pid_t pid = fork();
+  pid_t pid ;
+
+  if (use_vfork_if_available) {
+    pid = vfork();
+  } else {
+    pid = fork();
+  }
 
   if (pid < 0) {
     // fork failed