1 /*

     2  * Copyright (c) 2014, 2017, Oracle and/or its affiliates. All rights reserved.

     3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

     4  *

     5  * This code is free software; you can redistribute it and/or modify it

     6  * under the terms of the GNU General Public License version 2 only, as

     7  * published by the Free Software Foundation.

     8  *

     9  * This code is distributed in the hope that it will be useful, but WITHOUT

    10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

    11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

    12  * version 2 for more details (a copy is included in the LICENSE file that

    13  * accompanied this code).

    14  *

    15  * You should have received a copy of the GNU General Public License version

    16  * 2 along with this work; if not, write to the Free Software Foundation,

    17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

    18  *

    19  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

    20  * or visit www.oracle.com if you need additional information or have any

    21  * questions.

    22  *

    23  */

    24 

    25 #ifndef SHARE_VM_SERVICES_NMT_COMMON_HPP

    26 #define SHARE_VM_SERVICES_NMT_COMMON_HPP

    27 

    28 #include "memory/allocation.hpp"

    29 #include "utilities/align.hpp"

    30 #include "utilities/globalDefinitions.hpp"

    31 

    32 #define CALC_OBJ_SIZE_IN_TYPE(obj, type) (align_up_(sizeof(obj), sizeof(type))/sizeof(type))

    33 

    34 // Native memory tracking level

    35 enum NMT_TrackingLevel {

    36   NMT_unknown = 0xFF,

    37   NMT_off     = 0x00,

    38   NMT_minimal = 0x01,

    39   NMT_summary = 0x02,

    40   NMT_detail  = 0x03

    41 };

    42 

    43 // Number of stack frames to capture. This is a

    44 // build time decision.

    45 const int NMT_TrackingStackDepth = 4;

    46 

    47 // A few common utilities for native memory tracking

    48 class NMTUtil : AllStatic {

    49  public:

    50   // Map memory type to index

    51   static inline int flag_to_index(MEMFLAGS flag) {

    52     const int index = flag & 0xff;

    53     assert(index >= 0 && index < (int)mt_number_of_types, "Index out of bounds");

    54     return index;

    55   }

    56 

    57   // Map memory type to human readable name

    58   static const char* flag_to_name(MEMFLAGS flag) {

    59     return _memory_type_names[flag_to_index(flag)];

    60   }

    61 

    62   // Map an index to memory type

    63   static MEMFLAGS index_to_flag(int index) {

    64     assert(index >= 0 && index < (int) mt_number_of_types, "Index out of bounds");

    65     return (MEMFLAGS)index;

    66   }

    67 

    68   // Memory size scale

    69   static const char* scale_name(size_t scale);

    70   static size_t scale_from_name(const char* scale);

    71 

    72   // Translate memory size in specified scale

    73   static size_t amount_in_scale(size_t amount, size_t scale) {

    74     return (amount + scale / 2) / scale;

    75   }

    76  private:

    77   static const char* _memory_type_names[mt_number_of_types];

    78 };

    79 

    80 

    81 #endif