[BAEL-4204] JNA (#10113)

* [BAEL-4203] JNA

* [BAEL-4203] JNA

java-native/src/test/java/com/baeldung/jna/StdCUnitTest.java

@@ -0,0 +1,47 @@
+package com.baeldung.jna;
+
+import static org.junit.jupiter.api.Assertions.*;
+
+import org.junit.BeforeClass;
+import org.junit.jupiter.api.Test;
+
+import com.sun.jna.Native;
+import com.sun.jna.Platform;
+import com.sun.jna.Pointer;
+
+class StdCUnitTest {
+    
+    @BeforeClass
+    public static void setupProtectedMode() {
+        Native.setProtected(true);
+    }
+
+    @Test
+    public void whenMalloc_thenSuccess() {
+        StdC lib = StdC.INSTANCE;
+        Pointer p = lib.malloc(1024);
+        p.setMemory(0l, 1024l, (byte) 0);
+        lib.free(p);
+    }
+    
+    @Test
+    public void whenAccessViolation_thenShouldThrowError() {
+        // Running this test on Linux requires additional setup using libjsig.so
+        // Details here: http://java-native-access.github.io/jna/5.6.0/javadoc/overview-summary.html#crash-protection
+        // IMPORTANT NOTICE: Code for illustration purposes only. DON'T DO THIS IN YOUR OWN CODE
+        if ( Platform.isWindows()) {
+            Error e = null;
+            Pointer p = new Pointer(0l);
+            
+            try {
+                p.setMemory(0, 100*1024, (byte) 0);
+            }
+            catch(Error err) {
+                e = err;
+            }
+            
+            assertNotNull(e, "Should throw Error");
+        }
+    }
+
+}