v8  5.1.281(node6.10.3)
V8 is Google's open source JavaScript engine
v8-profiler.h
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1 // Copyright 2010 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_V8_PROFILER_H_
6 #define V8_V8_PROFILER_H_
7 
8 #include <vector>
9 #include "v8.h" // NOLINT(build/include)
10 
11 /**
12  * Profiler support for the V8 JavaScript engine.
13  */
14 namespace v8 {
15 
16 class HeapGraphNode;
18 
19 typedef uint32_t SnapshotObjectId;
20 
21 
23  int script_id;
25 };
26 
27 } // namespace v8
28 
29 #ifdef V8_OS_WIN
30 template class V8_EXPORT std::vector<v8::CpuProfileDeoptFrame>;
31 #endif
32 
33 namespace v8 {
34 
36  /** A pointer to a static string owned by v8. */
37  const char* deopt_reason;
39 };
40 
41 } // namespace v8
42 
43 #ifdef V8_OS_WIN
44 template class V8_EXPORT std::vector<v8::CpuProfileDeoptInfo>;
45 #endif
46 
47 namespace v8 {
48 
49 /**
50  * CpuProfileNode represents a node in a call graph.
51  */
53  public:
54  struct LineTick {
55  /** The 1-based number of the source line where the function originates. */
56  int line;
57 
58  /** The count of samples associated with the source line. */
59  unsigned int hit_count;
60  };
61 
62  /** Returns function name (empty string for anonymous functions.) */
63  Local<String> GetFunctionName() const;
64 
65  /** Returns id of the script where function is located. */
66  int GetScriptId() const;
67 
68  /** Returns resource name for script from where the function originates. */
69  Local<String> GetScriptResourceName() const;
70 
71  /**
72  * Returns the number, 1-based, of the line where the function originates.
73  * kNoLineNumberInfo if no line number information is available.
74  */
75  int GetLineNumber() const;
76 
77  /**
78  * Returns 1-based number of the column where the function originates.
79  * kNoColumnNumberInfo if no column number information is available.
80  */
81  int GetColumnNumber() const;
82 
83  /**
84  * Returns the number of the function's source lines that collect the samples.
85  */
86  unsigned int GetHitLineCount() const;
87 
88  /** Returns the set of source lines that collect the samples.
89  * The caller allocates buffer and responsible for releasing it.
90  * True if all available entries are copied, otherwise false.
91  * The function copies nothing if buffer is not large enough.
92  */
93  bool GetLineTicks(LineTick* entries, unsigned int length) const;
94 
95  /** Returns bailout reason for the function
96  * if the optimization was disabled for it.
97  */
98  const char* GetBailoutReason() const;
99 
100  /**
101  * Returns the count of samples where the function was currently executing.
102  */
103  unsigned GetHitCount() const;
104 
105  /** Returns function entry UID. */
106  unsigned GetCallUid() const;
107 
108  /** Returns id of the node. The id is unique within the tree */
109  unsigned GetNodeId() const;
110 
111  /** Returns child nodes count of the node. */
112  int GetChildrenCount() const;
113 
114  /** Retrieves a child node by index. */
115  const CpuProfileNode* GetChild(int index) const;
116 
117  /** Retrieves deopt infos for the node. */
118  const std::vector<CpuProfileDeoptInfo>& GetDeoptInfos() const;
119 
122 };
123 
124 
125 /**
126  * CpuProfile contains a CPU profile in a form of top-down call tree
127  * (from main() down to functions that do all the work).
128  */
130  public:
131  /** Returns CPU profile title. */
132  Local<String> GetTitle() const;
133 
134  /** Returns the root node of the top down call tree. */
135  const CpuProfileNode* GetTopDownRoot() const;
136 
137  /**
138  * Returns number of samples recorded. The samples are not recorded unless
139  * |record_samples| parameter of CpuProfiler::StartCpuProfiling is true.
140  */
141  int GetSamplesCount() const;
142 
143  /**
144  * Returns profile node corresponding to the top frame the sample at
145  * the given index.
146  */
147  const CpuProfileNode* GetSample(int index) const;
148 
149  /**
150  * Returns the timestamp of the sample. The timestamp is the number of
151  * microseconds since some unspecified starting point.
152  * The point is equal to the starting point used by GetStartTime.
153  */
154  int64_t GetSampleTimestamp(int index) const;
155 
156  /**
157  * Returns time when the profile recording was started (in microseconds)
158  * since some unspecified starting point.
159  */
160  int64_t GetStartTime() const;
161 
162  /**
163  * Returns time when the profile recording was stopped (in microseconds)
164  * since some unspecified starting point.
165  * The point is equal to the starting point used by GetStartTime.
166  */
167  int64_t GetEndTime() const;
168 
169  /**
170  * Deletes the profile and removes it from CpuProfiler's list.
171  * All pointers to nodes previously returned become invalid.
172  */
173  void Delete();
174 };
175 
176 
177 /**
178  * Interface for controlling CPU profiling. Instance of the
179  * profiler can be retrieved using v8::Isolate::GetCpuProfiler.
180  */
182  public:
183  /**
184  * Changes default CPU profiler sampling interval to the specified number
185  * of microseconds. Default interval is 1000us. This method must be called
186  * when there are no profiles being recorded.
187  */
188  void SetSamplingInterval(int us);
189 
190  /**
191  * Starts collecting CPU profile. Title may be an empty string. It
192  * is allowed to have several profiles being collected at
193  * once. Attempts to start collecting several profiles with the same
194  * title are silently ignored. While collecting a profile, functions
195  * from all security contexts are included in it. The token-based
196  * filtering is only performed when querying for a profile.
197  *
198  * |record_samples| parameter controls whether individual samples should
199  * be recorded in addition to the aggregated tree.
200  */
201  void StartProfiling(Local<String> title, bool record_samples = false);
202 
203  /**
204  * Stops collecting CPU profile with a given title and returns it.
205  * If the title given is empty, finishes the last profile started.
206  */
207  CpuProfile* StopProfiling(Local<String> title);
208 
209  /**
210  * Force collection of a sample. Must be called on the VM thread.
211  * Recording the forced sample does not contribute to the aggregated
212  * profile statistics.
213  */
214  void CollectSample();
215 
216  /**
217  * Tells the profiler whether the embedder is idle.
218  */
219  void SetIdle(bool is_idle);
220 
221  private:
222  CpuProfiler();
223  ~CpuProfiler();
224  CpuProfiler(const CpuProfiler&);
225  CpuProfiler& operator=(const CpuProfiler&);
226 };
227 
228 
229 /**
230  * HeapSnapshotEdge represents a directed connection between heap
231  * graph nodes: from retainers to retained nodes.
232  */
234  public:
235  enum Type {
236  kContextVariable = 0, // A variable from a function context.
237  kElement = 1, // An element of an array.
238  kProperty = 2, // A named object property.
239  kInternal = 3, // A link that can't be accessed from JS,
240  // thus, its name isn't a real property name
241  // (e.g. parts of a ConsString).
242  kHidden = 4, // A link that is needed for proper sizes
243  // calculation, but may be hidden from user.
244  kShortcut = 5, // A link that must not be followed during
245  // sizes calculation.
246  kWeak = 6 // A weak reference (ignored by the GC).
247  };
248 
249  /** Returns edge type (see HeapGraphEdge::Type). */
250  Type GetType() const;
251 
252  /**
253  * Returns edge name. This can be a variable name, an element index, or
254  * a property name.
255  */
256  Local<Value> GetName() const;
257 
258  /** Returns origin node. */
259  const HeapGraphNode* GetFromNode() const;
260 
261  /** Returns destination node. */
262  const HeapGraphNode* GetToNode() const;
263 };
264 
265 
266 /**
267  * HeapGraphNode represents a node in a heap graph.
268  */
270  public:
271  enum Type {
272  kHidden = 0, // Hidden node, may be filtered when shown to user.
273  kArray = 1, // An array of elements.
274  kString = 2, // A string.
275  kObject = 3, // A JS object (except for arrays and strings).
276  kCode = 4, // Compiled code.
277  kClosure = 5, // Function closure.
278  kRegExp = 6, // RegExp.
279  kHeapNumber = 7, // Number stored in the heap.
280  kNative = 8, // Native object (not from V8 heap).
281  kSynthetic = 9, // Synthetic object, usualy used for grouping
282  // snapshot items together.
283  kConsString = 10, // Concatenated string. A pair of pointers to strings.
284  kSlicedString = 11, // Sliced string. A fragment of another string.
285  kSymbol = 12, // A Symbol (ES6).
286  kSimdValue = 13 // A SIMD value stored in the heap (Proposed ES7).
287  };
288 
289  /** Returns node type (see HeapGraphNode::Type). */
290  Type GetType() const;
291 
292  /**
293  * Returns node name. Depending on node's type this can be the name
294  * of the constructor (for objects), the name of the function (for
295  * closures), string value, or an empty string (for compiled code).
296  */
297  Local<String> GetName() const;
298 
299  /**
300  * Returns node id. For the same heap object, the id remains the same
301  * across all snapshots.
302  */
303  SnapshotObjectId GetId() const;
304 
305  /** Returns node's own size, in bytes. */
306  size_t GetShallowSize() const;
307 
308  /** Returns child nodes count of the node. */
309  int GetChildrenCount() const;
310 
311  /** Retrieves a child by index. */
312  const HeapGraphEdge* GetChild(int index) const;
313 };
314 
315 
316 /**
317  * An interface for exporting data from V8, using "push" model.
318  */
319 class V8_EXPORT OutputStream { // NOLINT
320  public:
321  enum WriteResult {
323  kAbort = 1
324  };
325  virtual ~OutputStream() {}
326  /** Notify about the end of stream. */
327  virtual void EndOfStream() = 0;
328  /** Get preferred output chunk size. Called only once. */
329  virtual int GetChunkSize() { return 1024; }
330  /**
331  * Writes the next chunk of snapshot data into the stream. Writing
332  * can be stopped by returning kAbort as function result. EndOfStream
333  * will not be called in case writing was aborted.
334  */
335  virtual WriteResult WriteAsciiChunk(char* data, int size) = 0;
336  /**
337  * Writes the next chunk of heap stats data into the stream. Writing
338  * can be stopped by returning kAbort as function result. EndOfStream
339  * will not be called in case writing was aborted.
340  */
341  virtual WriteResult WriteHeapStatsChunk(HeapStatsUpdate* data, int count) {
342  return kAbort;
343  }
344 };
345 
346 
347 /**
348  * HeapSnapshots record the state of the JS heap at some moment.
349  */
351  public:
353  kJSON = 0 // See format description near 'Serialize' method.
354  };
355 
356  /** Returns the root node of the heap graph. */
357  const HeapGraphNode* GetRoot() const;
358 
359  /** Returns a node by its id. */
360  const HeapGraphNode* GetNodeById(SnapshotObjectId id) const;
361 
362  /** Returns total nodes count in the snapshot. */
363  int GetNodesCount() const;
364 
365  /** Returns a node by index. */
366  const HeapGraphNode* GetNode(int index) const;
367 
368  /** Returns a max seen JS object Id. */
370 
371  /**
372  * Deletes the snapshot and removes it from HeapProfiler's list.
373  * All pointers to nodes, edges and paths previously returned become
374  * invalid.
375  */
376  void Delete();
377 
378  /**
379  * Prepare a serialized representation of the snapshot. The result
380  * is written into the stream provided in chunks of specified size.
381  * The total length of the serialized snapshot is unknown in
382  * advance, it can be roughly equal to JS heap size (that means,
383  * it can be really big - tens of megabytes).
384  *
385  * For the JSON format, heap contents are represented as an object
386  * with the following structure:
387  *
388  * {
389  * snapshot: {
390  * title: "...",
391  * uid: nnn,
392  * meta: { meta-info },
393  * node_count: nnn,
394  * edge_count: nnn
395  * },
396  * nodes: [nodes array],
397  * edges: [edges array],
398  * strings: [strings array]
399  * }
400  *
401  * Nodes reference strings, other nodes, and edges by their indexes
402  * in corresponding arrays.
403  */
404  void Serialize(OutputStream* stream,
405  SerializationFormat format = kJSON) const;
406 };
407 
408 
409 /**
410  * An interface for reporting progress and controlling long-running
411  * activities.
412  */
413 class V8_EXPORT ActivityControl { // NOLINT
414  public:
417  kAbort = 1
418  };
419  virtual ~ActivityControl() {}
420  /**
421  * Notify about current progress. The activity can be stopped by
422  * returning kAbort as the callback result.
423  */
424  virtual ControlOption ReportProgressValue(int done, int total) = 0;
425 };
426 
427 
428 /**
429  * AllocationProfile is a sampled profile of allocations done by the program.
430  * This is structured as a call-graph.
431  */
433  public:
434  struct Allocation {
435  /**
436  * Size of the sampled allocation object.
437  */
439 
440  /**
441  * The number of objects of such size that were sampled.
442  */
443  unsigned int count;
444  };
445 
446  /**
447  * Represents a node in the call-graph.
448  */
449  struct Node {
450  /**
451  * Name of the function. May be empty for anonymous functions or if the
452  * script corresponding to this function has been unloaded.
453  */
454  Local<String> name;
455 
456  /**
457  * Name of the script containing the function. May be empty if the script
458  * name is not available, or if the script has been unloaded.
459  */
461 
462  /**
463  * id of the script where the function is located. May be equal to
464  * v8::UnboundScript::kNoScriptId in cases where the script doesn't exist.
465  */
467 
468  /**
469  * Start position of the function in the script.
470  */
472 
473  /**
474  * 1-indexed line number where the function starts. May be
475  * kNoLineNumberInfo if no line number information is available.
476  */
478 
479  /**
480  * 1-indexed column number where the function starts. May be
481  * kNoColumnNumberInfo if no line number information is available.
482  */
484 
485  /**
486  * List of callees called from this node for which we have sampled
487  * allocations. The lifetime of the children is scoped to the containing
488  * AllocationProfile.
489  */
490  std::vector<Node*> children;
491 
492  /**
493  * List of self allocations done by this node in the call-graph.
494  */
495  std::vector<Allocation> allocations;
496  };
497 
498  /**
499  * Returns the root node of the call-graph. The root node corresponds to an
500  * empty JS call-stack. The lifetime of the returned Node* is scoped to the
501  * containing AllocationProfile.
502  */
503  virtual Node* GetRootNode() = 0;
504 
505  virtual ~AllocationProfile() {}
506 
509 };
510 
511 
512 /**
513  * Interface for controlling heap profiling. Instance of the
514  * profiler can be retrieved using v8::Isolate::GetHeapProfiler.
515  */
517  public:
518  /**
519  * Callback function invoked for obtaining RetainedObjectInfo for
520  * the given JavaScript wrapper object. It is prohibited to enter V8
521  * while the callback is running: only getters on the handle and
522  * GetPointerFromInternalField on the objects are allowed.
523  */
524  typedef RetainedObjectInfo* (*WrapperInfoCallback)(uint16_t class_id,
525  Local<Value> wrapper);
526 
527  /** Returns the number of snapshots taken. */
528  int GetSnapshotCount();
529 
530  /** Returns a snapshot by index. */
531  const HeapSnapshot* GetHeapSnapshot(int index);
532 
533  /**
534  * Returns SnapshotObjectId for a heap object referenced by |value| if
535  * it has been seen by the heap profiler, kUnknownObjectId otherwise.
536  */
537  SnapshotObjectId GetObjectId(Local<Value> value);
538 
539  /**
540  * Returns heap object with given SnapshotObjectId if the object is alive,
541  * otherwise empty handle is returned.
542  */
544 
545  /**
546  * Clears internal map from SnapshotObjectId to heap object. The new objects
547  * will not be added into it unless a heap snapshot is taken or heap object
548  * tracking is kicked off.
549  */
550  void ClearObjectIds();
551 
552  /**
553  * A constant for invalid SnapshotObjectId. GetSnapshotObjectId will return
554  * it in case heap profiler cannot find id for the object passed as
555  * parameter. HeapSnapshot::GetNodeById will always return NULL for such id.
556  */
558 
559  /**
560  * Callback interface for retrieving user friendly names of global objects.
561  */
563  public:
564  /**
565  * Returns name to be used in the heap snapshot for given node. Returned
566  * string must stay alive until snapshot collection is completed.
567  */
568  virtual const char* GetName(Local<Object> object) = 0;
569 
570  protected:
571  virtual ~ObjectNameResolver() {}
572  };
573 
574  /**
575  * Takes a heap snapshot and returns it.
576  */
578  ActivityControl* control = NULL,
579  ObjectNameResolver* global_object_name_resolver = NULL);
580 
581  /**
582  * Starts tracking of heap objects population statistics. After calling
583  * this method, all heap objects relocations done by the garbage collector
584  * are being registered.
585  *
586  * |track_allocations| parameter controls whether stack trace of each
587  * allocation in the heap will be recorded and reported as part of
588  * HeapSnapshot.
589  */
590  void StartTrackingHeapObjects(bool track_allocations = false);
591 
592  /**
593  * Adds a new time interval entry to the aggregated statistics array. The
594  * time interval entry contains information on the current heap objects
595  * population size. The method also updates aggregated statistics and
596  * reports updates for all previous time intervals via the OutputStream
597  * object. Updates on each time interval are provided as a stream of the
598  * HeapStatsUpdate structure instances.
599  * If |timestamp_us| is supplied, timestamp of the new entry will be written
600  * into it. The return value of the function is the last seen heap object Id.
601  *
602  * StartTrackingHeapObjects must be called before the first call to this
603  * method.
604  */
606  int64_t* timestamp_us = NULL);
607 
608  /**
609  * Stops tracking of heap objects population statistics, cleans up all
610  * collected data. StartHeapObjectsTracking must be called again prior to
611  * calling GetHeapStats next time.
612  */
614 
615  /**
616  * Starts gathering a sampling heap profile. A sampling heap profile is
617  * similar to tcmalloc's heap profiler and Go's mprof. It samples object
618  * allocations and builds an online 'sampling' heap profile. At any point in
619  * time, this profile is expected to be a representative sample of objects
620  * currently live in the system. Each sampled allocation includes the stack
621  * trace at the time of allocation, which makes this really useful for memory
622  * leak detection.
623  *
624  * This mechanism is intended to be cheap enough that it can be used in
625  * production with minimal performance overhead.
626  *
627  * Allocations are sampled using a randomized Poisson process. On average, one
628  * allocation will be sampled every |sample_interval| bytes allocated. The
629  * |stack_depth| parameter controls the maximum number of stack frames to be
630  * captured on each allocation.
631  *
632  * NOTE: This is a proof-of-concept at this point. Right now we only sample
633  * newspace allocations. Support for paged space allocation (e.g. pre-tenured
634  * objects, large objects, code objects, etc.) and native allocations
635  * doesn't exist yet, but is anticipated in the future.
636  *
637  * Objects allocated before the sampling is started will not be included in
638  * the profile.
639  *
640  * Returns false if a sampling heap profiler is already running.
641  */
642  bool StartSamplingHeapProfiler(uint64_t sample_interval = 512 * 1024,
643  int stack_depth = 16);
644 
645  /**
646  * Stops the sampling heap profile and discards the current profile.
647  */
649 
650  /**
651  * Returns the sampled profile of allocations allocated (and still live) since
652  * StartSamplingHeapProfiler was called. The ownership of the pointer is
653  * transfered to the caller. Returns nullptr if sampling heap profiler is not
654  * active.
655  */
657 
658  /**
659  * Deletes all snapshots taken. All previously returned pointers to
660  * snapshots and their contents become invalid after this call.
661  */
662  void DeleteAllHeapSnapshots();
663 
664  /** Binds a callback to embedder's class ID. */
666  uint16_t class_id,
667  WrapperInfoCallback callback);
668 
669  /**
670  * Default value of persistent handle class ID. Must not be used to
671  * define a class. Can be used to reset a class of a persistent
672  * handle.
673  */
674  static const uint16_t kPersistentHandleNoClassId = 0;
675 
676  /** Returns memory used for profiler internal data and snapshots. */
678 
679  /**
680  * Sets a RetainedObjectInfo for an object group (see V8::SetObjectGroupId).
681  */
683 
684  private:
685  HeapProfiler();
686  ~HeapProfiler();
687  HeapProfiler(const HeapProfiler&);
688  HeapProfiler& operator=(const HeapProfiler&);
689 };
690 
691 
692 /**
693  * Interface for providing information about embedder's objects
694  * held by global handles. This information is reported in two ways:
695  *
696  * 1. When calling AddObjectGroup, an embedder may pass
697  * RetainedObjectInfo instance describing the group. To collect
698  * this information while taking a heap snapshot, V8 calls GC
699  * prologue and epilogue callbacks.
700  *
701  * 2. When a heap snapshot is collected, V8 additionally
702  * requests RetainedObjectInfos for persistent handles that
703  * were not previously reported via AddObjectGroup.
704  *
705  * Thus, if an embedder wants to provide information about native
706  * objects for heap snapshots, he can do it in a GC prologue
707  * handler, and / or by assigning wrapper class ids in the following way:
708  *
709  * 1. Bind a callback to class id by calling SetWrapperClassInfoProvider.
710  * 2. Call SetWrapperClassId on certain persistent handles.
711  *
712  * V8 takes ownership of RetainedObjectInfo instances passed to it and
713  * keeps them alive only during snapshot collection. Afterwards, they
714  * are freed by calling the Dispose class function.
715  */
716 class V8_EXPORT RetainedObjectInfo { // NOLINT
717  public:
718  /** Called by V8 when it no longer needs an instance. */
719  virtual void Dispose() = 0;
720 
721  /** Returns whether two instances are equivalent. */
722  virtual bool IsEquivalent(RetainedObjectInfo* other) = 0;
723 
724  /**
725  * Returns hash value for the instance. Equivalent instances
726  * must have the same hash value.
727  */
728  virtual intptr_t GetHash() = 0;
729 
730  /**
731  * Returns human-readable label. It must be a null-terminated UTF-8
732  * encoded string. V8 copies its contents during a call to GetLabel.
733  */
734  virtual const char* GetLabel() = 0;
735 
736  /**
737  * Returns human-readable group label. It must be a null-terminated UTF-8
738  * encoded string. V8 copies its contents during a call to GetGroupLabel.
739  * Heap snapshot generator will collect all the group names, create
740  * top level entries with these names and attach the objects to the
741  * corresponding top level group objects. There is a default
742  * implementation which is required because embedders don't have their
743  * own implementation yet.
744  */
745  virtual const char* GetGroupLabel() { return GetLabel(); }
746 
747  /**
748  * Returns element count in case if a global handle retains
749  * a subgraph by holding one of its nodes.
750  */
751  virtual intptr_t GetElementCount() { return -1; }
752 
753  /** Returns embedder's object size in bytes. */
754  virtual intptr_t GetSizeInBytes() { return -1; }
755 
756  protected:
758  virtual ~RetainedObjectInfo() {}
759 
760  private:
761  RetainedObjectInfo(const RetainedObjectInfo&);
762  RetainedObjectInfo& operator=(const RetainedObjectInfo&);
763 };
764 
765 
766 /**
767  * A struct for exporting HeapStats data from V8, using "push" model.
768  * See HeapProfiler::GetHeapStats.
769  */
771  HeapStatsUpdate(uint32_t index, uint32_t count, uint32_t size)
772  : index(index), count(count), size(size) { }
773  uint32_t index; // Index of the time interval that was changed.
774  uint32_t count; // New value of count field for the interval with this index.
775  uint32_t size; // New value of size field for the interval with this index.
776 };
777 
778 
779 } // namespace v8
780 
781 
782 #endif // V8_V8_PROFILER_H_
void DeleteAllHeapSnapshots()
Local< Value > GetName() const
const HeapGraphNode * GetFromNode() const
void StopTrackingHeapObjects()
Local< String > GetScriptResourceName() const
int64_t GetSampleTimestamp(int index) const
void SetWrapperClassInfoProvider(uint16_t class_id, WrapperInfoCallback callback)
virtual intptr_t GetHash()=0
const HeapGraphNode * GetToNode() const
Definition: v8.h:1707
Local< String > GetTitle() const
virtual ~OutputStream()
Definition: v8-profiler.h:325
SnapshotObjectId GetId() const
int64_t GetStartTime() const
std::vector< Node * > children
Definition: v8-profiler.h:490
bool StartSamplingHeapProfiler(uint64_t sample_interval=512 *1024, int stack_depth=16)
static const int kNoColumnInfo
Definition: v8.h:1524
static const int kNoColumnNumberInfo
Definition: v8-profiler.h:508
CpuProfile * StopProfiling(Local< String > title)
unsigned GetNodeId() const
SnapshotObjectId GetObjectId(Local< Value > value)
const HeapSnapshot * TakeHeapSnapshot(ActivityControl *control=NULL, ObjectNameResolver *global_object_name_resolver=NULL)
size_t GetShallowSize() const
static const int kNoLineNumberInfo
Definition: v8.h:1523
void SetSamplingInterval(int us)
const HeapGraphEdge * GetChild(int index) const
virtual ControlOption ReportProgressValue(int done, int total)=0
SnapshotObjectId GetHeapStats(OutputStream *stream, int64_t *timestamp_us=NULL)
void StartProfiling(Local< String > title, bool record_samples=false)
unsigned GetCallUid() const
int GetChildrenCount() const
virtual bool IsEquivalent(RetainedObjectInfo *other)=0
const HeapGraphNode * GetRoot() const
static const int kNoColumnNumberInfo
Definition: v8-profiler.h:121
SnapshotObjectId GetMaxSnapshotJSObjectId() const
Definition: libplatform.h:10
virtual int GetChunkSize()
Definition: v8-profiler.h:329
static const uint16_t kPersistentHandleNoClassId
Definition: v8-profiler.h:674
virtual const char * GetLabel()=0
int64_t GetEndTime() const
HeapStatsUpdate(uint32_t index, uint32_t count, uint32_t size)
Definition: v8-profiler.h:771
Type GetType() const
std::vector< CpuProfileDeoptFrame > stack
Definition: v8-profiler.h:38
virtual WriteResult WriteHeapStatsChunk(HeapStatsUpdate *data, int count)
Definition: v8-profiler.h:341
const CpuProfileNode * GetChild(int index) const
virtual ~RetainedObjectInfo()
Definition: v8-profiler.h:758
void StopSamplingHeapProfiler()
const std::vector< CpuProfileDeoptInfo > & GetDeoptInfos() const
size_t GetProfilerMemorySize()
void CollectSample()
virtual ~ActivityControl()
Definition: v8-profiler.h:419
const CpuProfileNode * GetTopDownRoot() const
bool GetLineTicks(LineTick *entries, unsigned int length) const
static const int kNoLineNumberInfo
Definition: v8-profiler.h:507
void SetRetainedObjectInfo(UniqueId id, RetainedObjectInfo *info)
int GetScriptId() const
std::vector< Allocation > allocations
Definition: v8-profiler.h:495
int GetSamplesCount() const
virtual ~AllocationProfile()
Definition: v8-profiler.h:505
Local< Value > FindObjectById(SnapshotObjectId id)
void Serialize(OutputStream *stream, SerializationFormat format=kJSON) const
virtual WriteResult WriteAsciiChunk(char *data, int size)=0
const HeapGraphNode * GetNode(int index) const
virtual void Dispose()=0
const char * deopt_reason
Definition: v8-profiler.h:37
unsigned int GetHitLineCount() const
uint32_t SnapshotObjectId
Definition: v8-profiler.h:17
int GetNodesCount() const
int GetChildrenCount() const
const CpuProfileNode * GetSample(int index) const
Local< String > GetName() const
AllocationProfile * GetAllocationProfile()
int GetColumnNumber() const
virtual Node * GetRootNode()=0
virtual intptr_t GetElementCount()
Definition: v8-profiler.h:751
unsigned GetHitCount() const
void StartTrackingHeapObjects(bool track_allocations=false)
Type GetType() const
void SetIdle(bool is_idle)
virtual void EndOfStream()=0
static const int kNoLineNumberInfo
Definition: v8-profiler.h:120
virtual intptr_t GetSizeInBytes()
Definition: v8-profiler.h:754
Local< String > script_name
Definition: v8-profiler.h:460
virtual const char * GetName(Local< Object > object)=0
const HeapGraphNode * GetNodeById(SnapshotObjectId id) const
const HeapSnapshot * GetHeapSnapshot(int index)
#define V8_EXPORT
Definition: v8.h:60
const char * GetBailoutReason() const
virtual const char * GetGroupLabel()
Definition: v8-profiler.h:745
Local< String > GetFunctionName() const
int GetLineNumber() const
static const SnapshotObjectId kUnknownObjectId
Definition: v8-profiler.h:557