[Bug 2032] [IcedTea7] CACAO lacks JVM_FindClassFromCaller introduced by security patch in 2.5.3

[bugzilla-daemon at icedtea.classpath.org]

http://icedtea.classpath.org/bugzilla/show_bug.cgi?id=2032

--- Comment #8 from Andrew John Hughes <gnu.andrew at redhat.com> ---
  // Tells whether the initiating class' protection can access the this _klass  
  bool is_valid_protection_domain(Handle protection_domain) {
    if (!ProtectionDomainVerification) return true;
    if (!SystemDictionary::has_checkPackageAccess()) return true;

    return protection_domain() == NULL
         ? true
         : contains_protection_domain(protection_domain());
  }

bool DictionaryEntry::contains_protection_domain(oop protection_domain) const {
  if (protection_domain == instanceKlass::cast(klass())->protection_domain()) {
    // Succeeds trivially                                                       
    return true;
  }

  for (ProtectionDomainEntry* current = _pd_set;
                              current != NULL;
                              current = current->next()) {
    if (current->protection_domain() == protection_domain) return true;
  }
  return false;
}

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