intercept SIGSEGV and throw NullPointerExceptions

test/NullPointer.java

@@ -0,0 +1,92 @@
+public class NullPointer {
+  private int x;
+  private Object y;
+
+  public static void main(String[] args) {
+    // invokeinterface
+    try {
+      ((Runnable) null).run();
+    } catch (NullPointerException e) {
+      e.printStackTrace();
+    }
+
+    // invokevirtual
+    try {
+      ((Object) null).toString();
+    } catch (NullPointerException e) {
+      e.printStackTrace();
+    }
+
+    // arraylength
+    try {
+      int a = ((byte[]) null).length;
+    } catch (NullPointerException e) {
+      e.printStackTrace();
+    }
+
+    // iaload
+    try {
+      int a = ((byte[]) null)[42];
+    } catch (NullPointerException e) {
+      e.printStackTrace();
+    }
+
+    // aaload
+    try {
+      Object a = ((Object[]) null)[42];
+    } catch (NullPointerException e) {
+      e.printStackTrace();
+    }
+
+    // getfield (int)
+    try {
+      int a = ((NullPointer) null).x;
+    } catch (NullPointerException e) {
+      e.printStackTrace();
+    }
+
+    // getfield (Object)
+    try {
+      Object a = ((NullPointer) null).y;
+    } catch (NullPointerException e) {
+      e.printStackTrace();
+    }
+
+    // iastore
+    try {
+      ((byte[]) null)[42] = 42;
+    } catch (NullPointerException e) {
+      e.printStackTrace();
+    }
+
+    // aastore
+    try {
+      ((Object[]) null)[42] = null;
+    } catch (NullPointerException e) {
+      e.printStackTrace();
+    }
+
+    // putfield (int)
+    try {
+      ((NullPointer) null).x = 42;
+    } catch (NullPointerException e) {
+      e.printStackTrace();
+    }
+
+    // putfield (Object)
+    try {
+      ((NullPointer) null).y = null;
+    } catch (NullPointerException e) {
+      e.printStackTrace();
+    }
+
+    // monitorenter
+    try {
+      synchronized ((Object) null) {
+        int a = 42;
+      }
+    } catch (NullPointerException e) {
+      e.printStackTrace();
+    }
+  }
+}