8041626: Shutdown tracing event

Reviewed-by: dholmes, alanb, rriggs

make/mapfiles/libjava/mapfile-vers

@@ -205,6 +205,7 @@ SUNWprivate_1.1 {
 		Java_java_lang_SecurityManager_currentClassLoader0;
 		Java_java_lang_SecurityManager_currentLoadedClass0;
 		Java_java_lang_SecurityManager_getClassContext;
+		Java_java_lang_Shutdown_beforeHalt;
 		Java_java_lang_Shutdown_halt0;
 		Java_java_lang_String_intern;
 		Java_java_lang_System_identityHashCode;

src/share/classes/java/lang/Runtime.java

@@ -272,6 +272,7 @@ public class Runtime {
         if (sm != null) {
             sm.checkExit(status);
         }
+        Shutdown.beforeHalt();
         Shutdown.halt(status);
     }
 

src/share/classes/java/lang/Shutdown.java

 /*
- * Copyright (c) 1999, 2005, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 1999, 2018, 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
@@ -130,6 +130,9 @@ class Shutdown {
         }
     }
 
+    /* Notify the VM that it's time to halt. */
+    static native void beforeHalt();
+
     /* The halt method is synchronized on the halt lock
      * to avoid corruption of the delete-on-shutdown file list.
      * It invokes the true native halt method.
@@ -209,6 +212,7 @@ class Shutdown {
             /* Synchronize on the class object, causing any other thread
              * that attempts to initiate shutdown to stall indefinitely
              */
+            beforeHalt();
             sequence();
             halt(status);
         }

src/share/javavm/export/jvm.h

@@ -131,6 +131,9 @@ JVM_CopySwapMemory(JNIEnv *env, jobject srcObj, jlong srcOffset,
 JNIEXPORT void JNICALL
 JVM_Exit(jint code);
 
+JNIEXPORT void JNICALL
+JVM_BeforeHalt();
+
 JNIEXPORT void JNICALL
 JVM_Halt(jint code);
 

src/share/native/java/lang/Shutdown.c

 /*
- * Copyright (c) 1999, 2003, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 1999, 2018, 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
@@ -29,6 +29,11 @@
 
 #include "java_lang_Shutdown.h"
 
+JNIEXPORT void JNICALL
+Java_java_lang_Shutdown_beforeHalt(JNIEnv *env, jclass ignored)
+{
+    JVM_BeforeHalt();
+}
 
 JNIEXPORT void JNICALL
 Java_java_lang_Shutdown_halt0(JNIEnv *env, jclass ignored, jint code)