src/os/linux/vm/os_linux.cpp

@@ -1,7 +1,7 @@
 /*
- * 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
  * under the terms of the GNU General Public License version 2 only, as
  * published by the Free Software Foundation.

@@ -6335,14 +6335,20 @@
 
 // Run the specified command in a separate process. Return its exit value,
 // 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
     return -1;