--- old/src/os/aix/vm/os_aix.cpp	2019-02-21 18:56:00.163415416 +0000
+++ new/src/os/aix/vm/os_aix.cpp	2019-02-21 18:56:00.053414692 +0000
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 1999, 2018, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 1999, 2019, Oracle and/or its affiliates. All rights reserved.
  * Copyright 2012, 2014 SAP AG. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
@@ -5142,7 +5142,7 @@
 // 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();
--- old/src/os/bsd/vm/os_bsd.cpp	2019-02-21 18:56:00.523417787 +0000
+++ new/src/os/bsd/vm/os_bsd.cpp	2019-02-21 18:56:00.413417064 +0000
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 1999, 2018, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 1999, 2019, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -4716,7 +4716,7 @@
 // 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) {
   const char * argv[4] = {"sh", "-c", cmd, NULL};
 
   // fork() in BsdThreads/NPTL is not async-safe. It needs to run
--- old/src/os/linux/vm/os_linux.cpp	2019-02-21 18:56:00.883420160 +0000
+++ new/src/os/linux/vm/os_linux.cpp	2019-02-21 18:56:00.773419435 +0000
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 1999, 2018, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 1999, 2019, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -6337,10 +6337,16 @@
 // 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
--- old/src/os/solaris/vm/os_solaris.cpp	2019-02-21 18:56:01.253422598 +0000
+++ new/src/os/solaris/vm/os_solaris.cpp	2019-02-21 18:56:01.143421873 +0000
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 1997, 2018, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 1997, 2019, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -6153,7 +6153,7 @@
 // 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];
   argv[0] = (char *)"sh";
   argv[1] = (char *)"-c";
--- old/src/os/windows/vm/os_windows.cpp	2019-02-21 18:56:01.623425035 +0000
+++ new/src/os/windows/vm/os_windows.cpp	2019-02-21 18:56:01.513424311 +0000
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 1997, 2018, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 1997, 2019, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -5034,7 +5034,7 @@
 
 // Run the specified command in a separate process. Return its exit value,
 // or -1 on failure (e.g. can't create a new process).
-int os::fork_and_exec(char* cmd) {
+int os::fork_and_exec(char* cmd, bool use_vfork_if_available) {
   STARTUPINFO si;
   PROCESS_INFORMATION pi;
 
--- old/src/share/vm/runtime/os.hpp	2019-02-21 18:56:01.993427473 +0000
+++ new/src/share/vm/runtime/os.hpp	2019-02-21 18:56:01.893426814 +0000
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 1997, 2018, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 1997, 2019, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -527,7 +527,7 @@
   static char* do_you_want_to_debug(const char* message);
 
   // run cmd in a separate process and return its exit code; or -1 on failures
-  static int fork_and_exec(char *cmd);
+  static int fork_and_exec(char *cmd, bool use_vfork_if_available = false);
 
   // os::exit() is merged with vm_exit()
   // static void exit(int num);
--- old/src/share/vm/utilities/vmError.cpp	2019-02-21 18:56:02.323429646 +0000
+++ new/src/share/vm/utilities/vmError.cpp	2019-02-21 18:56:02.223428988 +0000
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2003, 2018, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2003, 2019, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -1060,7 +1060,7 @@
       out.print_raw   (cmd);
       out.print_raw_cr("\" ...");
 
-      if (os::fork_and_exec(cmd) < 0) {
+      if (os::fork_and_exec(cmd, true) < 0) {
         out.print_cr("os::fork_and_exec failed: %s (%d)", strerror(errno), errno);
       }
     }