Class: Vernier::HeapTracker

Inherits:
Object
  • Object
show all
Defined in:
lib/vernier/heap_tracker.rb,
ext/vernier/heap_tracker.cc

Overview

Plan: The heap tracker can be in a few states:

* Idle
* Collecting
  * Watching for new objects
  * Watching for freed objects
* Draining
  * Ignoring new objects
  * Watching for freed objects
* Locked
  * Ignoring new objects
  * Ignoring freed objects
  * Marking all existing objects (not yet implemented)
  * N.B. This prevents any objects which the tracker has seen from being GC'd

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Instance Attribute Details

#stack_table ⇒ Object (readonly)

Returns the value of attribute stack_table.



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# File 'lib/vernier/heap_tracker.rb', line 18

def stack_table
  @stack_table
end

Class Method Details

.new(stack_table = StackTable.new) ⇒ Object 



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# File 'lib/vernier/heap_tracker.rb', line 20

def self.new(stack_table = StackTable.new)
  _new(stack_table)
end

.track(&block) ⇒ Object 



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# File 'lib/vernier/heap_tracker.rb', line 28

def self.track(&block)
  tracker = new
  tracker.track(&block)
  tracker
end

Instance Method Details

#inspect ⇒ Object 



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# File 'lib/vernier/heap_tracker.rb', line 24

def inspect
  "#<#{self.class} allocated_objects=#{allocated_objects} freed_objects=#{freed_objects} stack_table=#{stack_table.inspect}>"
end

#stack(obj) ⇒ Object 



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# File 'lib/vernier/heap_tracker.rb', line 41

def stack(obj)
  idx = stack_idx(obj)
  return nil unless idx
  stack_table.stack(idx)
end

#track ⇒ Object 



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# File 'lib/vernier/heap_tracker.rb', line 34

def track
  collect
  yield self
ensure
  lock
end