PNG  IHDR pHYs   OiCCPPhotoshop ICC profilexڝSgTS=BKKoR RB&*! J!QEEȠQ, !{kּ> H3Q5 B.@ $pd!s#~<<+"x M0B\t8K@zB@F&S`cbP-`'{[! eDh;VEX0fK9-0IWfH  0Q){`##xFW<+*x<$9E[-qWW.(I+6aa@.y24x6_-"bbϫp@t~,/;m%h^ uf@Wp~<5j>{-]cK'Xto(hw?G%fIq^D$.Tʳ?D*A, `6B$BB dr`)B(Ͱ*`/@4Qhp.U=pa( Aa!ڈbX#!H$ ɈQ"K5H1RT UH=r9\F;2G1Q= C7F dt1r=6Ыhڏ>C03l0.B8, c˱" VcϱwE 6wB aAHXLXNH $4 7 Q'"K&b21XH,#/{C7$C2'ITFnR#,4H#dk9, +ȅ3![ b@qS(RjJ4e2AURݨT5ZBRQ4u9̓IKhhitݕNWGw Ljg(gwLӋT071oUX**| J&*/Tު UUT^S}FU3S ԖUPSSg;goT?~YYLOCQ_ cx,!k u5&|v*=9C3J3WRf?qtN (~))4L1e\kXHQG6EYAJ'\'GgSSݧ M=:.kDwn^Loy}/TmG X $ <5qo</QC]@Caaᄑ.ȽJtq]zۯ6iܟ4)Y3sCQ? 0k߬~OCOg#/c/Wװwa>>r><72Y_7ȷOo_C#dz%gA[z|!?:eAAA!h쐭!ΑiP~aa~ 'W?pX15wCsDDDޛg1O9-J5*>.j<74?.fYXXIlK9.*6nl {/]py.,:@LN8A*%w% yg"/6шC\*NH*Mz쑼5y$3,幄'L Lݛ:v m2=:1qB!Mggfvˬen/kY- BTZ(*geWf͉9+̳ې7ᒶKW-X潬j9(xoʿܔĹdff-[n ڴ VE/(ۻCɾUUMfeI?m]Nmq#׹=TR+Gw- 6 U#pDy  :v{vg/jBFS[b[O>zG499?rCd&ˮ/~јѡ򗓿m|x31^VwwO| (hSЧc3- cHRMz%u0`:o_F@8N ' p @8N@8}' p '#@8N@8N pQ9p!i~}|6-ӪG` VP.@*j>[ K^<֐Z]@8N'KQ<Q(`s" 'hgpKB`R@Dqj '  'P$a ( `D$Na L?u80e J,K˷NI'0eݷ(NI'؀ 2ipIIKp`:O'`ʤxB8Ѥx Ѥx $ $P6 :vRNb 'p,>NB 'P]-->P T+*^h& p '‰a ‰ (ĵt#u33;Nt̵'ޯ; [3W ~]0KH1q@8]O2]3*̧7# *p>us p _6]/}-4|t'|Smx= DoʾM×M_8!)6lq':l7!|4} '\ne t!=hnLn (~Dn\+‰_4k)0e@OhZ`F `.m1} 'vp{F`ON7Srx 'D˸nV`><;yMx!IS钦OM)Ե٥x 'DSD6bS8!" ODz#R >S8!7ّxEh0m$MIPHi$IvS8IN$I p$O8I,sk&I)$IN$Hi$I^Ah.p$MIN$IR8I·N "IF9Ah0m$MIN$IR8IN$I 3jIU;kO$ɳN$+ q.x* tEXtComment

Viewing File: /opt/alt/alt-nodejs18/root/usr/include/node/v8-statistics.h

// Copyright 2021 the V8 project authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#ifndef INCLUDE_V8_STATISTICS_H_
#define INCLUDE_V8_STATISTICS_H_

#include <stddef.h>
#include <stdint.h>

#include <memory>
#include <utility>
#include <vector>

#include "v8-local-handle.h"  // NOLINT(build/include_directory)
#include "v8-promise.h"       // NOLINT(build/include_directory)
#include "v8config.h"         // NOLINT(build/include_directory)

namespace v8 {

class Context;
class Isolate;

namespace internal {
class ReadOnlyHeap;
}  // namespace internal

/**
 * Controls how the default MeasureMemoryDelegate reports the result of
 * the memory measurement to JS. With kSummary only the total size is reported.
 * With kDetailed the result includes the size of each native context.
 */
enum class MeasureMemoryMode { kSummary, kDetailed };

/**
 * Controls how promptly a memory measurement request is executed.
 * By default the measurement is folded with the next scheduled GC which may
 * happen after a while and is forced after some timeout.
 * The kEager mode starts incremental GC right away and is useful for testing.
 * The kLazy mode does not force GC.
 */
enum class MeasureMemoryExecution { kDefault, kEager, kLazy };

/**
 * The delegate is used in Isolate::MeasureMemory API.
 *
 * It specifies the contexts that need to be measured and gets called when
 * the measurement is completed to report the results.
 */
class V8_EXPORT MeasureMemoryDelegate {
 public:
  virtual ~MeasureMemoryDelegate() = default;

  /**
   * Returns true if the size of the given context needs to be measured.
   */
  virtual bool ShouldMeasure(Local<Context> context) = 0;

  /**
   * This function is called when memory measurement finishes.
   *
   * \param context_sizes_in_bytes a vector of (context, size) pairs that
   *   includes each context for which ShouldMeasure returned true and that
   *   was not garbage collected while the memory measurement was in progress.
   *
   * \param unattributed_size_in_bytes total size of objects that were not
   *   attributed to any context (i.e. are likely shared objects).
   */
  virtual void MeasurementComplete(
      const std::vector<std::pair<Local<Context>, size_t>>&
          context_sizes_in_bytes,
      size_t unattributed_size_in_bytes) = 0;

  /**
   * Returns a default delegate that resolves the given promise when
   * the memory measurement completes.
   *
   * \param isolate the current isolate
   * \param context the current context
   * \param promise_resolver the promise resolver that is given the
   *   result of the memory measurement.
   * \param mode the detail level of the result.
   */
  static std::unique_ptr<MeasureMemoryDelegate> Default(
      Isolate* isolate, Local<Context> context,
      Local<Promise::Resolver> promise_resolver, MeasureMemoryMode mode);
};

/**
 * Collection of shared per-process V8 memory information.
 *
 * Instances of this class can be passed to
 * v8::V8::GetSharedMemoryStatistics to get shared memory statistics from V8.
 */
class V8_EXPORT SharedMemoryStatistics {
 public:
  SharedMemoryStatistics();
  size_t read_only_space_size() { return read_only_space_size_; }
  size_t read_only_space_used_size() { return read_only_space_used_size_; }
  size_t read_only_space_physical_size() {
    return read_only_space_physical_size_;
  }

 private:
  size_t read_only_space_size_;
  size_t read_only_space_used_size_;
  size_t read_only_space_physical_size_;

  friend class V8;
  friend class internal::ReadOnlyHeap;
};

/**
 * Collection of V8 heap information.
 *
 * Instances of this class can be passed to v8::Isolate::GetHeapStatistics to
 * get heap statistics from V8.
 */
class V8_EXPORT HeapStatistics {
 public:
  HeapStatistics();
  size_t total_heap_size() { return total_heap_size_; }
  size_t total_heap_size_executable() { return total_heap_size_executable_; }
  size_t total_physical_size() { return total_physical_size_; }
  size_t total_available_size() { return total_available_size_; }
  size_t total_global_handles_size() { return total_global_handles_size_; }
  size_t used_global_handles_size() { return used_global_handles_size_; }
  size_t used_heap_size() { return used_heap_size_; }
  size_t heap_size_limit() { return heap_size_limit_; }
  size_t malloced_memory() { return malloced_memory_; }
  size_t external_memory() { return external_memory_; }
  size_t peak_malloced_memory() { return peak_malloced_memory_; }
  size_t number_of_native_contexts() { return number_of_native_contexts_; }
  size_t number_of_detached_contexts() { return number_of_detached_contexts_; }

  /**
   * Returns a 0/1 boolean, which signifies whether the V8 overwrite heap
   * garbage with a bit pattern.
   */
  size_t does_zap_garbage() { return does_zap_garbage_; }

 private:
  size_t total_heap_size_;
  size_t total_heap_size_executable_;
  size_t total_physical_size_;
  size_t total_available_size_;
  size_t used_heap_size_;
  size_t heap_size_limit_;
  size_t malloced_memory_;
  size_t external_memory_;
  size_t peak_malloced_memory_;
  bool does_zap_garbage_;
  size_t number_of_native_contexts_;
  size_t number_of_detached_contexts_;
  size_t total_global_handles_size_;
  size_t used_global_handles_size_;

  friend class V8;
  friend class Isolate;
};

class V8_EXPORT HeapSpaceStatistics {
 public:
  HeapSpaceStatistics();
  const char* space_name() { return space_name_; }
  size_t space_size() { return space_size_; }
  size_t space_used_size() { return space_used_size_; }
  size_t space_available_size() { return space_available_size_; }
  size_t physical_space_size() { return physical_space_size_; }

 private:
  const char* space_name_;
  size_t space_size_;
  size_t space_used_size_;
  size_t space_available_size_;
  size_t physical_space_size_;

  friend class Isolate;
};

class V8_EXPORT HeapObjectStatistics {
 public:
  HeapObjectStatistics();
  const char* object_type() { return object_type_; }
  const char* object_sub_type() { return object_sub_type_; }
  size_t object_count() { return object_count_; }
  size_t object_size() { return object_size_; }

 private:
  const char* object_type_;
  const char* object_sub_type_;
  size_t object_count_;
  size_t object_size_;

  friend class Isolate;
};

class V8_EXPORT HeapCodeStatistics {
 public:
  HeapCodeStatistics();
  size_t code_and_metadata_size() { return code_and_metadata_size_; }
  size_t bytecode_and_metadata_size() { return bytecode_and_metadata_size_; }
  size_t external_script_source_size() { return external_script_source_size_; }
  size_t cpu_profiler_metadata_size() { return cpu_profiler_metadata_size_; }

 private:
  size_t code_and_metadata_size_;
  size_t bytecode_and_metadata_size_;
  size_t external_script_source_size_;
  size_t cpu_profiler_metadata_size_;

  friend class Isolate;
};

}  // namespace v8

#endif  // INCLUDE_V8_STATISTICS_H_
Back to Directory=ceiIENDB`