LCOV - code coverage report
Current view: top level - src/heap - object-stats.h (source / functions) Hit Total Coverage
Test: app.info Lines: 0 4 0.0 %
Date: 2019-03-21 Functions: 0 0 -

          Line data    Source code
       1             : // Copyright 2015 the V8 project authors. All rights reserved.
       2             : // Use of this source code is governed by a BSD-style license that can be
       3             : // found in the LICENSE file.
       4             : 
       5             : #ifndef V8_HEAP_OBJECT_STATS_H_
       6             : #define V8_HEAP_OBJECT_STATS_H_
       7             : 
       8             : #include "src/objects.h"
       9             : #include "src/objects/code.h"
      10             : 
      11             : // These instance types do not exist for actual use but are merely introduced
      12             : // for object stats tracing. In contrast to Code and FixedArray sub types
      13             : // these types are not known to other counters outside of object stats
      14             : // tracing.
      15             : //
      16             : // Update LAST_VIRTUAL_TYPE below when changing this macro.
      17             : #define VIRTUAL_INSTANCE_TYPE_LIST(V)            \
      18             :   CODE_KIND_LIST(V)                              \
      19             :   V(ARRAY_BOILERPLATE_DESCRIPTION_ELEMENTS_TYPE) \
      20             :   V(BOILERPLATE_ELEMENTS_TYPE)                   \
      21             :   V(BOILERPLATE_PROPERTY_ARRAY_TYPE)             \
      22             :   V(BOILERPLATE_PROPERTY_DICTIONARY_TYPE)        \
      23             :   V(BYTECODE_ARRAY_CONSTANT_POOL_TYPE)           \
      24             :   V(BYTECODE_ARRAY_HANDLER_TABLE_TYPE)           \
      25             :   V(COW_ARRAY_TYPE)                              \
      26             :   V(DEOPTIMIZATION_DATA_TYPE)                    \
      27             :   V(DEPENDENT_CODE_TYPE)                         \
      28             :   V(ELEMENTS_TYPE)                               \
      29             :   V(EMBEDDED_OBJECT_TYPE)                        \
      30             :   V(ENUM_CACHE_TYPE)                             \
      31             :   V(ENUM_INDICES_CACHE_TYPE)                     \
      32             :   V(FEEDBACK_VECTOR_ENTRY_TYPE)                  \
      33             :   V(FEEDBACK_VECTOR_HEADER_TYPE)                 \
      34             :   V(FEEDBACK_VECTOR_CREATE_CLOSURE_ARRAY_TYPE)   \
      35             :   V(FEEDBACK_VECTOR_SLOT_CALL_TYPE)              \
      36             :   V(FEEDBACK_VECTOR_SLOT_CALL_UNUSED_TYPE)       \
      37             :   V(FEEDBACK_VECTOR_SLOT_ENUM_TYPE)              \
      38             :   V(FEEDBACK_VECTOR_SLOT_LOAD_TYPE)              \
      39             :   V(FEEDBACK_VECTOR_SLOT_LOAD_UNUSED_TYPE)       \
      40             :   V(FEEDBACK_VECTOR_SLOT_OTHER_TYPE)             \
      41             :   V(FEEDBACK_VECTOR_SLOT_STORE_TYPE)             \
      42             :   V(FEEDBACK_VECTOR_SLOT_STORE_UNUSED_TYPE)      \
      43             :   V(FUNCTION_TEMPLATE_INFO_ENTRIES_TYPE)         \
      44             :   V(GLOBAL_ELEMENTS_TYPE)                        \
      45             :   V(GLOBAL_PROPERTIES_TYPE)                      \
      46             :   V(JS_ARRAY_BOILERPLATE_TYPE)                   \
      47             :   V(JS_COLLECTION_TABLE_TYPE)                    \
      48             :   V(JS_OBJECT_BOILERPLATE_TYPE)                  \
      49             :   V(NOSCRIPT_SHARED_FUNCTION_INFOS_TYPE)         \
      50             :   V(NUMBER_STRING_CACHE_TYPE)                    \
      51             :   V(OBJECT_PROPERTY_DICTIONARY_TYPE)             \
      52             :   V(OBJECT_TO_CODE_TYPE)                         \
      53             :   V(OPTIMIZED_CODE_LITERALS_TYPE)                \
      54             :   V(OTHER_CONTEXT_TYPE)                          \
      55             :   V(PROTOTYPE_USERS_TYPE)                        \
      56             :   V(REGEXP_MULTIPLE_CACHE_TYPE)                  \
      57             :   V(RELOC_INFO_TYPE)                             \
      58             :   V(RETAINED_MAPS_TYPE)                          \
      59             :   V(SCRIPT_LIST_TYPE)                            \
      60             :   V(SCRIPT_SHARED_FUNCTION_INFOS_TYPE)           \
      61             :   V(SCRIPT_SOURCE_EXTERNAL_ONE_BYTE_TYPE)        \
      62             :   V(SCRIPT_SOURCE_EXTERNAL_TWO_BYTE_TYPE)        \
      63             :   V(SCRIPT_SOURCE_NON_EXTERNAL_ONE_BYTE_TYPE)    \
      64             :   V(SCRIPT_SOURCE_NON_EXTERNAL_TWO_BYTE_TYPE)    \
      65             :   V(SERIALIZED_OBJECTS_TYPE)                     \
      66             :   V(SINGLE_CHARACTER_STRING_CACHE_TYPE)          \
      67             :   V(STRING_SPLIT_CACHE_TYPE)                     \
      68             :   V(STRING_EXTERNAL_RESOURCE_ONE_BYTE_TYPE)      \
      69             :   V(STRING_EXTERNAL_RESOURCE_TWO_BYTE_TYPE)      \
      70             :   V(SOURCE_POSITION_TABLE_TYPE)                  \
      71             :   V(UNCOMPILED_JS_FUNCTION_TYPE)                 \
      72             :   V(UNCOMPILED_SHARED_FUNCTION_INFO_TYPE)        \
      73             :   V(WEAK_NEW_SPACE_OBJECT_TO_CODE_TYPE)
      74             : 
      75             : namespace v8 {
      76             : namespace internal {
      77             : 
      78             : class Heap;
      79             : class Isolate;
      80             : 
      81             : class ObjectStats {
      82             :  public:
      83             :   static const size_t kNoOverAllocation = 0;
      84             : 
      85           0 :   explicit ObjectStats(Heap* heap) : heap_(heap) { ClearObjectStats(); }
      86             : 
      87             :   // See description on VIRTUAL_INSTANCE_TYPE_LIST.
      88             :   enum VirtualInstanceType {
      89             : #define DEFINE_VIRTUAL_INSTANCE_TYPE(type) type,
      90             :     VIRTUAL_INSTANCE_TYPE_LIST(DEFINE_VIRTUAL_INSTANCE_TYPE)
      91             : #undef DEFINE_FIXED_ARRAY_SUB_INSTANCE_TYPE
      92             :         LAST_VIRTUAL_TYPE = WEAK_NEW_SPACE_OBJECT_TO_CODE_TYPE,
      93             :   };
      94             : 
      95             :   // ObjectStats are kept in two arrays, counts and sizes. Related stats are
      96             :   // stored in a contiguous linear buffer. Stats groups are stored one after
      97             :   // another.
      98             :   enum {
      99             :     FIRST_VIRTUAL_TYPE = LAST_TYPE + 1,
     100             :     OBJECT_STATS_COUNT = FIRST_VIRTUAL_TYPE + LAST_VIRTUAL_TYPE + 1,
     101             :   };
     102             : 
     103             :   void ClearObjectStats(bool clear_last_time_stats = false);
     104             : 
     105             :   void PrintJSON(const char* key);
     106             :   void Dump(std::stringstream& stream);
     107             : 
     108             :   void CheckpointObjectStats();
     109             :   void RecordObjectStats(InstanceType type, size_t size);
     110             :   void RecordVirtualObjectStats(VirtualInstanceType type, size_t size,
     111             :                                 size_t over_allocated);
     112             : 
     113             :   size_t object_count_last_gc(size_t index) {
     114           0 :     return object_counts_last_time_[index];
     115             :   }
     116             : 
     117             :   size_t object_size_last_gc(size_t index) {
     118           0 :     return object_sizes_last_time_[index];
     119             :   }
     120             : 
     121             :   Isolate* isolate();
     122             :   Heap* heap() { return heap_; }
     123             : 
     124             :  private:
     125             :   static const int kFirstBucketShift = 5;  // <32
     126             :   static const int kLastBucketShift = 20;  // >=1M
     127             :   static const int kFirstBucket = 1 << kFirstBucketShift;
     128             :   static const int kLastBucket = 1 << kLastBucketShift;
     129             :   static const int kNumberOfBuckets = kLastBucketShift - kFirstBucketShift + 1;
     130             :   static const int kLastValueBucketIndex = kLastBucketShift - kFirstBucketShift;
     131             : 
     132             :   void PrintKeyAndId(const char* key, int gc_count);
     133             :   // The following functions are excluded from inline to reduce the overall
     134             :   // binary size of VB. On x64 this save around 80KB.
     135             :   V8_NOINLINE void PrintInstanceTypeJSON(const char* key, int gc_count,
     136             :                                          const char* name, int index);
     137             :   V8_NOINLINE void DumpInstanceTypeData(std::stringstream& stream,
     138             :                                         const char* name, int index);
     139             : 
     140             :   int HistogramIndexFromSize(size_t size);
     141             : 
     142             :   Heap* heap_;
     143             :   // Object counts and used memory by InstanceType.
     144             :   size_t object_counts_[OBJECT_STATS_COUNT];
     145             :   size_t object_counts_last_time_[OBJECT_STATS_COUNT];
     146             :   size_t object_sizes_[OBJECT_STATS_COUNT];
     147             :   size_t object_sizes_last_time_[OBJECT_STATS_COUNT];
     148             :   // Approximation of overallocated memory by InstanceType.
     149             :   size_t over_allocated_[OBJECT_STATS_COUNT];
     150             :   // Detailed histograms by InstanceType.
     151             :   size_t size_histogram_[OBJECT_STATS_COUNT][kNumberOfBuckets];
     152             :   size_t over_allocated_histogram_[OBJECT_STATS_COUNT][kNumberOfBuckets];
     153             : 
     154             :   size_t tagged_fields_count_;
     155             :   size_t embedder_fields_count_;
     156             :   size_t unboxed_double_fields_count_;
     157             :   size_t raw_fields_count_;
     158             : 
     159             :   friend class ObjectStatsCollectorImpl;
     160             : };
     161             : 
     162             : class ObjectStatsCollector {
     163             :  public:
     164             :   ObjectStatsCollector(Heap* heap, ObjectStats* live, ObjectStats* dead)
     165           0 :       : heap_(heap), live_(live), dead_(dead) {
     166             :     DCHECK_NOT_NULL(heap_);
     167             :     DCHECK_NOT_NULL(live_);
     168             :     DCHECK_NOT_NULL(dead_);
     169             :   }
     170             : 
     171             :   // Collects type information of live and dead objects. Requires mark bits to
     172             :   // be present.
     173             :   void Collect();
     174             : 
     175             :  private:
     176             :   Heap* const heap_;
     177             :   ObjectStats* const live_;
     178             :   ObjectStats* const dead_;
     179             : };
     180             : 
     181             : }  // namespace internal
     182             : }  // namespace v8
     183             : 
     184             : #endif  // V8_HEAP_OBJECT_STATS_H_

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