[GR-64194] Invoke teardown hooks in Shutdown#exit substitution.

PullRequest: graal/20540

Author: DSouzaM

substratevm/src/com.oracle.svm.core/src/com/oracle/svm/core/jdk/Target_java_lang_Shutdown.java

@@ -62,6 +62,29 @@ static void beforeHalt() {
     private static void logRuntimeExit(int status) {
         // Disable exit logging (GR-45418/JDK-8301627)
     }
+
+    @Alias
+    static native void runHooks();
+
+    @Alias
+    static native void halt(int status);
+
+    /**
+     * This substitution makes a few modifications to {@code Shutdown#exit}:
+     * <ul>
+     * <li>it omits {@code logRuntimeExit} (exit logging is disabled: GR-45418/JDK-8301627).</li>
+     * <li>it omits {@code beforeHalt} (not implemented).</li>
+     * <li>it runs teardown hooks after running shutdown hooks and before halting.</li>
+     * </ul>
+     */
+    @Substitute
+    static void exit(int status) {
+        synchronized (Target_java_lang_Shutdown.class) {
+            runHooks();
+            RuntimeSupport.executeTearDownHooks();
+            halt(status);
+        }
+    }
 }
 
 /** Utility methods for Target_java_lang_Shutdown. */