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#include "classfile/javaClasses.hpp"

#include "oops/instanceKlass.inline.hpp"

#include "oops/instanceMirrorKlass.hpp"

#include "oops/klass.hpp"

#include "oops/oop.inline.hpp"

#include "utilities/debug.hpp"

#include "utilities/globalDefinitions.hpp"

#include "utilities/macros.hpp"

template <typename T, class OopClosureType>

void InstanceMirrorKlass::oop_oop_iterate_statics(oop obj, OopClosureType* closure) {

  T* p         = (T*)start_of_static_fields(obj);

  T* const end = p + java_lang_Class::static_oop_field_count_raw(obj);

  for (; p < end; ++p) {

    Devirtualizer::do_oop(closure, p);

  }

}

template <typename T, class OopClosureType>

void InstanceMirrorKlass::oop_oop_iterate(oop obj, OopClosureType* closure) {

  InstanceKlass::oop_oop_iterate<T>(obj, closure);

  if (Devirtualizer::do_metadata(closure)) {

    Klass* klass = java_lang_Class::as_Klass_raw(obj);

    // We'll get NULL for primitive mirrors.

    if (klass != NULL) {

      if (klass->is_instance_klass() &&

          InstanceKlass::cast(klass)->is_unsafe_anonymous()) {

        // An unsafe anonymous class doesn't have its own class loader, so

        // when handling the java mirror for the class we need to make sure its class

        // loader data is claimed, this is done by calling do_cld explicitly.

        // For non-anonymous classes the call to do_cld is made when the class

        // loader itself is handled.

        Devirtualizer::do_cld(closure, klass->class_loader_data());

      } else {

        Devirtualizer::do_klass(closure, klass);

      }

    } else {

      // We would like to assert here (as below) that if klass has been NULL, then

      // this has been a mirror for a primitive type that we do not need to follow

      // as they are always strong roots.

      // However, we might get across a klass that just changed during CMS concurrent

      // marking if allocation occurred in the old generation.

      // This is benign here, as we keep alive all CLDs that were loaded during the

      // CMS concurrent phase in the class loading, i.e. they will be iterated over

      // and kept alive during remark.

      // assert(java_lang_Class::is_primitive(obj), "Sanity check");

    }

  }

  oop_oop_iterate_statics<T>(obj, closure);

}

template <typename T, class OopClosureType>

void InstanceMirrorKlass::oop_oop_iterate_reverse(oop obj, OopClosureType* closure) {

  InstanceKlass::oop_oop_iterate_reverse<T>(obj, closure);

  InstanceMirrorKlass::oop_oop_iterate_statics<T>(obj, closure);

}

template <typename T, class OopClosureType>

void InstanceMirrorKlass::oop_oop_iterate_statics_bounded(oop obj,

                                                          OopClosureType* closure,

                                                          MemRegion mr) {

  T* p   = (T*)start_of_static_fields(obj);

  T* end = p + java_lang_Class::static_oop_field_count_raw(obj);

  T* const l   = (T*)mr.start();

  T* const h   = (T*)mr.end();

  assert(mask_bits((intptr_t)l, sizeof(T)-1) == 0 &&

         mask_bits((intptr_t)h, sizeof(T)-1) == 0,

         "bounded region must be properly aligned");

  if (p < l) {

    p = l;

  }

  if (end > h) {

    end = h;

  }

  for (;p < end; ++p) {

    Devirtualizer::do_oop(closure, p);

  }

}

template <typename T, class OopClosureType>

void InstanceMirrorKlass::oop_oop_iterate_bounded(oop obj, OopClosureType* closure, MemRegion mr) {

  InstanceKlass::oop_oop_iterate_bounded<T>(obj, closure, mr);

  if (Devirtualizer::do_metadata(closure)) {

    if (mr.contains(obj)) {

      Klass* klass = java_lang_Class::as_Klass_raw(obj);

      // We'll get NULL for primitive mirrors.

      if (klass != NULL) {

        Devirtualizer::do_klass(closure, klass);

      }

    }

  }

  oop_oop_iterate_statics_bounded<T>(obj, closure, mr);

}