Patch: Remove exception catching from normal path in Arrays.equals.

[Tom Tromey]

>>>>> "Andrew" == Andrew Haley <aph@redhat.com> writes:

>> And this one would be even better:
>> Class* caller = t->tryTofindFirstNonNullClassStartingAtIndex (1);
>> if (caller)
>> caller_loader = caller->getClassLoaderInternal ();
>> ...where tryTofindFirstNonNullClassStartingAtIndex, a new method of
>> StackTrace, is replaced by a better name (I'm bad at names).

Andrew> This isn't a totally bad idea.  But findCallerClass might be a
Andrew> better name.

Classpath's VMSecurityManager already has:

  /**
   * Get the current ClassLoader. This is the first non-null class loader
   * on the stack, if one exists, stopping either at the end of the stack
   * or the first instance of a PrivilegedAction. In other words, this call
   * automatically unwinds past all classes loaded by the bootstrap loader,
   * where getClassLoader() returns null, to get to the user class that
   * really invoked the call that needs a classloader.
   *
   * @return the current ClassLoader
   */
  static native ClassLoader currentClassLoader();


If we specifically need the caller's class, and not the class loader,
we can add a new method to VMSecurityManager.

In general the Classpath VM* approach seems pretty good, and it will
benefit us if we adopt it in most cases.

Tom