@PostConstruct
void init() {
SecurityManager security = System.getSecurityManager();
if (security == null) {
canKill = true;
} else {
try {
security.checkExit(0);
canKill = true;
} catch (Exception e) {
canKill = false;
}
}
}
/**
* {@inheritDoc}
*
* <p>This method inspects the stack trace and checks who is calling {@link System#exit(int)} and
* similar methods
*
* @throws SecurityException if the caller of this method is not the test runner itself.
*/
@Override
public void checkExit(final int status) {
AccessController.doPrivileged(
new PrivilegedAction<Void>() {
@Override
public Void run() {
final String systemClassName = System.class.getName(),
runtimeClassName = Runtime.class.getName();
String exitMethodHit = null;
for (final StackTraceElement se : Thread.currentThread().getStackTrace()) {
final String className = se.getClassName(), methodName = se.getMethodName();
if (("exit".equals(methodName) || "halt".equals(methodName))
&& (systemClassName.equals(className) || runtimeClassName.equals(className))) {
exitMethodHit = className + '#' + methodName + '(' + status + ')';
continue;
}
if (exitMethodHit != null) {
if (className.startsWith(TEST_RUNNER_PACKAGE)) {
// this exit point is allowed, we return normally from closure:
return /*void*/ null;
} else {
// anything else in stack trace is not allowed, break and throw SecurityException
// below:
break;
}
}
}
if (exitMethodHit == null) {
// should never happen, only if JVM hides stack trace - replace by generic:
exitMethodHit = "JVM exit method";
}
throw new SecurityException(
exitMethodHit
+ " calls are not allowed because they terminate the test runner's JVM.");
}
});
// we passed the stack check, delegate to super, so default policy can still deny permission:
super.checkExit(status);
}
private void build(Applet applet, String[] args, int width, int height) {
++instances;
this.applet = applet;
this.args = args;
applet.setStub(this);
name = applet.getClass().getName();
setTitle(name);
// Set up properties.
Properties props = System.getProperties();
props.put("browser", "Acme.MainFrame");
props.put("browser.version", "11jul96");
props.put("browser.vendor", "Acme Laboratories");
props.put("browser.vendor.url", "http://www.acme.com/");
// Turn args into parameters by way of the properties list.
if (args != null) parseArgs(args, props);
// If width and height are specified in the parameters, override
// the compiled-in values.
String widthStr = getParameter("width");
if (widthStr != null) width = Integer.parseInt(widthStr);
String heightStr = getParameter("height");
if (heightStr != null) height = Integer.parseInt(heightStr);
// Were width and height specified somewhere?
if (width == -1 || height == -1) {
System.err.println("Width and height must be specified.");
return;
}
// Lay out components.
Container contentPane = getContentPane();
contentPane.add(applet, BorderLayout.CENTER);
// Set up size.
pack();
validate();
appletSize = applet.getSize();
applet.setSize(width, height);
setVisible(true);
/*
Added WindowListener inner class to detect close events.
*/
SecurityManager sm = System.getSecurityManager();
boolean doExit = true;
if (sm != null) {
try {
sm.checkExit(0);
} catch (SecurityException e) {
doExit = false;
}
}
final boolean _doExit = doExit;
// WindowListener inner class to detect close events.
addWindowListener(
new WindowAdapter() {
@Override
public void windowClosing(WindowEvent winEvent) {
if (JMainFrame.this.applet != null) {
JMainFrame.this.applet.destroy();
}
hide();
try {
dispose();
} catch (IllegalStateException e) {
}
if (_doExit) {
System.exit(0);
}
}
});
// Start a separate thread to call the applet's init() and start()
// methods, in case they take a long time.
(new Thread(this)).start();
}
/**
* Tell the VM to run the finalize() method on every single Object before it exits. Note that the
* JVM may still exit abnormally and not perform this, so you still don't have a guarantee. And
* besides that, this is inherently unsafe in multi-threaded code, as it may result in deadlock as
* multiple threads compete to manipulate objects. This value defaults to <code>false</code>.
* There is a security check, <code>checkExit(0)</code>.
*
* @param finalizeOnExit whether to finalize all Objects on exit
* @throws SecurityException if permission is denied
* @see #exit(int)
* @see #gc()
* @since 1.1
* @deprecated never rely on finalizers to do a clean, thread-safe, mop-up from your code
*/
public static void runFinalizersOnExit(boolean finalizeOnExit) {
SecurityManager sm = SecurityManager.current; // Be thread-safe!
if (sm != null) sm.checkExit(0);
current.finalizeOnExit = finalizeOnExit;
}
/**
* Forcibly terminate the virtual machine. This call never returns. It is much more severe than
* <code>exit</code>, as it bypasses all shutdown hooks and initializers. Use caution in calling
* this! Of course, there is a security check, <code>checkExit(status)</code>.
*
* @param status the status to exit with
* @throws SecurityException if permission is denied
* @since 1.3
* @see #exit(int)
* @see #addShutdownHook(Thread)
*/
public void halt(int status) {
SecurityManager sm = SecurityManager.current; // Be thread-safe!
if (sm != null) sm.checkExit(status);
exitInternal(status);
}
/**
* Exit the Java runtime. This method will either throw a SecurityException or it will never
* return. The status code is returned to the system; often a non-zero status code indicates an
* abnormal exit. Of course, there is a security check, <code>checkExit(status)</code>.
*
* <p>First, all shutdown hooks are run, in unspecified order, and concurrently. Next, if
* finalization on exit has been enabled, all pending finalizers are run. Finally, the system
* calls <code>halt</code>.
*
* <p>If this is run a second time after shutdown has already started, there are two actions. If
* shutdown hooks are still executing, it blocks indefinitely. Otherwise, if the status is nonzero
* it halts immediately; if it is zero, it blocks indefinitely. This is typically called by <code>
* System.exit</code>.
*
* @param status the status to exit with
* @throws SecurityException if permission is denied
* @see #addShutdownHook(Thread)
* @see #runFinalizersOnExit(boolean)
* @see #runFinalization()
* @see #halt(int)
*/
public void exit(int status) {
SecurityManager sm = SecurityManager.current; // Be thread-safe!
if (sm != null) sm.checkExit(status);
exitNoChecks(status);
}
@Override
public void checkExit(int status) {
super.checkExit(status);
throw new RuntimeException("System.exit() was called. Raising exception.");
}
@Override
public void checkExit(final int pStatus) {
if (finalSecurityManager != null) finalSecurityManager.checkExit(pStatus);
}
@Override
public void checkExit(final int status) {
super.checkExit(status);
if (Thread.currentThread().getName().startsWith("interpreter")) throw new SecurityException();
if (securityManager != null) securityManager.checkExit(status);
}
