runtime/managed_stack.cc

/*
 * Copyright (C) 2011 The Android Open Source Project
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

#include "managed_stack-inl.h"

#include "android-base/stringprintf.h"

#include "art_method.h"
#include "mirror/object.h"
#include "stack_reference.h"

namespace art {

size_t ManagedStack::NumJniShadowFrameReferences() const {
  size_t count = 0;
  for (const ManagedStack* current_fragment = this; current_fragment != nullptr;
       current_fragment = current_fragment->GetLink()) {
    for (ShadowFrame* current_frame = current_fragment->top_shadow_frame_;
         current_frame != nullptr;
         current_frame = current_frame->GetLink()) {
      if (current_frame->GetMethod()->IsNative()) {
        // The JNI ShadowFrame only contains references. (For indirect reference.)
        count += current_frame->NumberOfVRegs();
      }
    }
  }
  return count;
}

bool ManagedStack::ShadowFramesContain(StackReference<mirror::Object>* shadow_frame_entry) const {
  for (const ManagedStack* current_fragment = this; current_fragment != nullptr;
       current_fragment = current_fragment->GetLink()) {
    for (ShadowFrame* current_frame = current_fragment->top_shadow_frame_;
         current_frame != nullptr;
         current_frame = current_frame->GetLink()) {
      if (current_frame->Contains(shadow_frame_entry)) {
        return true;
      }
    }
  }
  return false;
}

}  // namespace art