- Remove heap tracing.

runtime/vm/heap_trace.h

-// Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
-// for details. All rights reserved. Use of this source code is governed by a
-// BSD-style license that can be found in the LICENSE file.
-
-#ifndef VM_HEAP_TRACE_H_
-#define VM_HEAP_TRACE_H_
-
-#include "include/dart_api.h"
-#include "vm/globals.h"
-#include "vm/object_set.h"
-
-namespace dart {
-
-// Forward declarations.
-class HeapTraceVisitor;
-class Isolate;
-class RawClass;
-class RawObject;
-class RawString;
-class BaseZone;
-
-class HeapTrace {
- public:
-  enum RecordSize {
-    kRootSize = 5,
-    kAllocSize = 9,
-    kSnapshotAllocSize = 9,
-    kCopySize = 9,
-    kStoreSize = 13,
-    kSweepSize = 5,
-    kDeathRangeSize = 9,
-    kPromotionSize = 9,
-    kAllocZoneHandleSize = 9,
-    kDeleteZoneSize = 5,
-    kRegisterClassSize = 5,
-    kAllocScopedHandleSize = 5,
-    kDeleteScopedHandlesSize = 1,
-    kMarkSweepStartSize = 1,
-    kMarkSweepFinishSize = 1,
-    kObjectStoreSize = 5
-  };
-
-  enum RecordType {
-    kRootType = 'R',
-    kAllocType = 'A',
-    kSnapshotAllocType = 'B',
-    kCopyType = 'C',
-    kStoreType = 'U',
-    kSweepType = 'S',
-    kDeathRangeType = 'L',
-    kPromotionType = 'P',
-    kAllocZoneHandleType = 'Z',
-    kDeleteZoneType = 'z',
-    kRegisterClassType = 'K',
-    kAllocScopedHandleType = 'H',
-    kDeleteScopedHandlesType = 'h',
-    kMarkSweepStartType = '{',
-    kMarkSweepFinishType = '}',
-    kObjectStoreType = 'O'
-  };
-
-  template <RecordType T, RecordSize N>
-  class Record {
-   public:
-    explicit Record(HeapTrace* trace): cursor_(0), trace_(trace) {
-      ASSERT(N >= 1);
-      buffer_[0] = T;
-      ++cursor_;
-    }
-    ~Record() {
-      (*trace_->write_callback_)(Buffer(), Length(), trace_->output_stream_);
-    }
-
-    void Write(uword word) {
-      ASSERT(cursor_ + sizeof(word) <= N);
-      memmove(&buffer_[cursor_], &word, sizeof(word));
-      cursor_ += sizeof(word);
-    }
-
-    intptr_t Length() const { return cursor_; }
-
-    const uint8_t* Buffer() const {
-      ASSERT(cursor_ == N);
-      return buffer_;
-    }
-
-   private:
-    uint8_t buffer_[N];
-    intptr_t cursor_;
-    HeapTrace* trace_;
-    DISALLOW_COPY_AND_ASSIGN(Record);
-  };
-
-  typedef Record<kRootType, kRootSize> RootRecord;
-  typedef Record<kAllocType, kAllocSize> AllocationRecord;
-  typedef Record<kSnapshotAllocType, kSnapshotAllocSize>
-  SnapshotAllocationRecord;
-  typedef Record<kCopyType, kCopySize> CopyRecord;
-  typedef Record<kStoreType, kStoreSize> StoreRecord;
-  typedef Record<kSweepType, kSweepSize> SweepRecord;
-  typedef Record<kDeathRangeType, kDeathRangeSize> DeathRangeRecord;
-  typedef Record<kPromotionType, kPromotionSize> PromotionRecord;
-  typedef Record<kAllocZoneHandleType, kAllocZoneHandleSize>
-  AllocZoneHandleRecord;
-  typedef Record<kDeleteZoneType, kDeleteZoneSize>
-  DeleteZoneRecord;
-  typedef Record<kRegisterClassType, kRegisterClassSize> RegisterClassRecord;
-  typedef Record<kAllocScopedHandleType, kAllocScopedHandleSize>
-  AllocScopedHandleRecord;
-  typedef Record<kDeleteScopedHandlesType, kDeleteScopedHandlesSize>
-  DeleteScopedHandlesRecord;
-  typedef Record<kMarkSweepStartType, kMarkSweepStartSize> MarkSweepStartRecord;
-  typedef Record<kMarkSweepFinishType, kMarkSweepFinishSize>
-  MarkSweepFinishRecord;
-  typedef Record<kObjectStoreType, kObjectStoreSize> ObjectStoreRecord;
-
-  HeapTrace();
-  ~HeapTrace();
-
-  // Called by the isolate just before EnableGrowthControl.  Indicates
-  // the Isolate is initialized and enables tracing.
-  void Init(Isolate* isolate);
-
-  // Called when an object is allocated in the heap.
-  void TraceAllocation(uword addr, intptr_t size);
-
-  // Invoked after the snapshot is loaded at Isolate startup time.
-  void TraceSnapshotAlloc(RawObject* obj, intptr_t size);
-
-  // Rename to something like TraceAllocateZoneHandle (or whatever)
-  void TraceAllocateZoneHandle(uword handle, uword zone_addr);
-
-  // Invoked when a Zone block is deleted.
-  void TraceDeleteZone(Zone* zone);
-
-  // Invoked whenever the scoped handles are delelted.
-  void TraceDeleteScopedHandles();
-
-  // Invoked when objects are coped from the from space to the to space
-  // by the scavenger.
-  void TraceCopy(uword from_addr, uword to_addr);
-
-  // Invoked on each pointer in the object store.
-  void TraceObjectStorePointer(uword addr);
-
-  // Invoked when an object is promoted from the new space to the old space.
-  void TracePromotion(uword old_addr, uword promoted_addr);
-
-  // Invoked after a scavenge with the addressed range of from-space
-  void TraceDeathRange(uword inclusive_start, uword exclusive_end);
-
-  // Invoked whenever a class is registered in the class table.
-  void TraceRegisterClass(const Class& cls);
-
-  // Invoked when an address is swept.
-  void TraceSweep(uword sweept_addr);
-
-  // Invoked when storing value into origin, and value is an object.
-  void TraceStoreIntoObject(uword origin_object_addr,
-                            uword slot_addr,
-                            uword value);
-
-  // Invoked when starting a mark-sweep collection on old space
-  void TraceMarkSweepStart();
-
-  // Invoked after finishing a mark sweep collection on old space.
-  void TraceMarkSweepFinish();
-
-  // Initialize tracing globablly across the VM. Invidual isolates
-  // will still have to initialized themselves when they are started.
-  static void InitOnce(Dart_FileOpenCallback open_callback,
-                       Dart_FileWriteCallback write_callback,
-                       Dart_FileCloseCallback close_callback);
-
-  // Returns true if tracign is enabled for the VM.
-  static bool is_enabled() { return is_enabled_; }
-
- private:
-  ObjectSet* CreateEmptyObjectSet() const;
-  void ResizeObjectSet();
-
-  void TraceScopedHandle(uword handle);
-
-  // A helper for PutRoots, called by HeapTraceVisitor.
-  void TraceSingleRoot(uword root);
-
-  // Invoked while tracing an allocation.
-  void TraceRoots(Isolate* isolate);
-
-  // Is the isolate we are tracing initialized?
-  bool isolate_initialized_;
-
-  void* output_stream_;
-
-  ObjectSet object_set_;
-
-  static Dart_FileOpenCallback open_callback_;
-  static Dart_FileWriteCallback write_callback_;
-  static Dart_FileCloseCallback close_callback_;
-
-  static bool is_enabled_;
-
-  friend class HeapTraceVisitor;
-  friend class HeapTraceScopedHandleVisitor;
-  friend class HeapTraceObjectStoreVisitor;
-  friend class HeapTraceDebugObjectVisitor;
-
-  DISALLOW_COPY_AND_ASSIGN(HeapTrace);
-};
-
-}  // namespace dart
-
-#endif  // VM_HEAP_TRACE_H_