runtime/runtime_stats.h

/*
 * Copyright (C) 2008 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.
 */

#ifndef ART_RUNTIME_RUNTIME_STATS_H_
#define ART_RUNTIME_RUNTIME_STATS_H_

#include <stdint.h>

namespace art {

// These must match the values in dalvik.system.VMDebug.
enum StatKinds {
  KIND_ALLOCATED_OBJECTS      = 1<<0,
  KIND_ALLOCATED_BYTES        = 1<<1,
  KIND_FREED_OBJECTS          = 1<<2,
  KIND_FREED_BYTES            = 1<<3,
  KIND_GC_INVOCATIONS         = 1<<4,
  KIND_CLASS_INIT_COUNT       = 1<<5,
  KIND_CLASS_INIT_TIME        = 1<<6,

  // These values exist for backward compatibility.
  KIND_EXT_ALLOCATED_OBJECTS = 1<<12,
  KIND_EXT_ALLOCATED_BYTES   = 1<<13,
  KIND_EXT_FREED_OBJECTS     = 1<<14,
  KIND_EXT_FREED_BYTES       = 1<<15,

  KIND_GLOBAL_ALLOCATED_OBJECTS   = KIND_ALLOCATED_OBJECTS,
  KIND_GLOBAL_ALLOCATED_BYTES     = KIND_ALLOCATED_BYTES,
  KIND_GLOBAL_FREED_OBJECTS       = KIND_FREED_OBJECTS,
  KIND_GLOBAL_FREED_BYTES         = KIND_FREED_BYTES,
  KIND_GLOBAL_GC_INVOCATIONS      = KIND_GC_INVOCATIONS,
  KIND_GLOBAL_CLASS_INIT_COUNT    = KIND_CLASS_INIT_COUNT,
  KIND_GLOBAL_CLASS_INIT_TIME     = KIND_CLASS_INIT_TIME,

  KIND_THREAD_ALLOCATED_OBJECTS   = KIND_ALLOCATED_OBJECTS << 16,
  KIND_THREAD_ALLOCATED_BYTES     = KIND_ALLOCATED_BYTES << 16,
  KIND_THREAD_FREED_OBJECTS       = KIND_FREED_OBJECTS << 16,
  KIND_THREAD_FREED_BYTES         = KIND_FREED_BYTES << 16,

  KIND_THREAD_GC_INVOCATIONS      = KIND_GC_INVOCATIONS << 16,

  // TODO: failedAllocCount, failedAllocSize
};

/*
 * Memory allocation profiler state.  This is used both globally and
 * per-thread.
 */
struct PACKED(4) RuntimeStats {
  RuntimeStats() {
    Clear(~0);
  }

  void Clear(int flags) {
    if ((flags & KIND_ALLOCATED_OBJECTS) != 0) {
      allocated_objects = 0;
    }
    if ((flags & KIND_ALLOCATED_BYTES) != 0) {
      allocated_bytes = 0;
    }
    if ((flags & KIND_FREED_OBJECTS) != 0) {
      freed_objects = 0;
    }
    if ((flags & KIND_FREED_BYTES) != 0) {
      freed_bytes = 0;
    }
    if ((flags & KIND_GC_INVOCATIONS) != 0) {
      gc_for_alloc_count = 0;
    }
    if ((flags & KIND_CLASS_INIT_COUNT) != 0) {
      class_init_count = 0;
    }
    if ((flags & KIND_CLASS_INIT_TIME) != 0) {
      class_init_time_ns = 0;
    }
  }

  // Number of objects allocated.
  uint64_t allocated_objects;
  // Cumulative size of all objects allocated.
  uint64_t allocated_bytes;

  // Number of objects freed.
  uint64_t freed_objects;
  // Cumulative size of all freed objects.
  uint64_t freed_bytes;

  // Number of times an allocation triggered a GC.
  uint64_t gc_for_alloc_count;

  // Number of initialized classes.
  uint64_t class_init_count;
  // Cumulative time spent in class initialization.
  uint64_t class_init_time_ns;

  DISALLOW_COPY_AND_ASSIGN(RuntimeStats);
};

}  // namespace art

#endif  // ART_RUNTIME_RUNTIME_STATS_H_