--- old/src/java.base/unix/native/libjava/childproc.c	2019-05-20 16:11:16.825769201 +0200
+++ new/src/java.base/unix/native/libjava/childproc.c	2019-05-20 16:11:16.637770103 +0200
@@ -314,6 +314,13 @@
 {
     const ChildStuff* p = (const ChildStuff*) arg;
 
+    if (p->sendAlivePing) {
+        /* Child shall signal aliveness to parent at the very first
+         * moment. */
+        int code = CHILD_IS_ALIVE;
+        restartableWrite(p->fail[1], &code, sizeof(code));
+    }
+
     /* Close the parent sides of the pipes.
        Closing pipe fds here is redundant, since closeDescriptors()
        would do it anyways, but a little paranoia is a good thing. */