--- old/src/hotspot/os/aix/os_aix.cpp	2018-10-04 14:38:56.335316196 +0530
+++ new/src/hotspot/os/aix/os_aix.cpp	2018-10-04 14:38:56.203316197 +0530
@@ -4259,7 +4259,7 @@
 // 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) {
   char * argv[4] = {"sh", "-c", cmd, NULL};
 
   pid_t pid = fork();