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Memory Validator Help

The Types tab summarises all the types of objects in the target program.


interactiveRead on, or click a part of the images below to jump straight to the help for that area.


The left hand side of the view shows controls and a variety of statistics:





 The right hand side of the view shows information about event sequence id:




The view lists of all the objects in the program with their type, size and number allocated as well as other information.


You can constrain the displayed objects to those in particular threads or DLLs, and those between watermarks or being tracked by tag trackers.


seeAlsoMuch of the statistics and settings here are also relevant for the Sizes tab.



Types tab


At the top of the Types tab is a set of five more tabs allowing you to change the scope within which objects and types are shown in the table.




Thread instructionStep show stats for an individual thread in the list or All threads (the default)


DLL instructionStep show stats for a chosen DLL or All of them (the default)


Watermark instructionStep filter the display to show objects used between two watermarks


Tag Tracker instructionStep display stats for an individual tag tracker or for All trackers


Tag Tracker Macro instructionStep shows amalgamated values of all object types in each tag tracker group, allowing overviews of memory use within each tag



Colours used in the display


Each object type's row is coloured according to whether the object has:


objects-colours-red  an increasing count

objects-colours-blue  a decreasing count

objects-colours-gray  a static count - i.e. not recently changed

objects-colours-white  a zero count


The importance of each value within most of the columns is highlighted with a percentage bar:


objects-colours-dkgreen  the object type with the maximum value in a given column

objects-colours-green  relative contribution of the object value in each column


seeAlsoSee also the Data Highlighting dialog to customise the first two colours.



The data columns


The data in each column is summarised below and described in more detail further down, with the help of examples.


Some of the header columns display a total for the column underneath the column name.



R Size

C Size




% R Size

% C Size

% Objects

R Total

C Total

Seq 1

Add Seq

Del Seq

Cur Seq


object type  

running allocation size

cumulative allocation size

number of live allocations

maximum number of live allocations

cumulative number of allocations

size as percentage of total running allocations

size as percentage of total cumulative allocations

object count as percentage of total number of objects

running total size (R Size x Count)

cumulative total size (C Size x Cumulative)

sequence id of first allocation of this type

id of most recent allocation

id of most recent deallocation

id of most recent allocation or deallocation

the span between first and most recent event sequence ids


To best explain the numbers in each column we'll use a simple example scenario which has a series of char[] allocations and deallocations shown in order of their event sequence id.


This event sequence below (not actual code) will be used to demonstrate how some of the figures in the columns would change with each event. Note this would leak allocations s4 and s5.







The type is simply that of the memory allocation, determined by parsing the source code at the allocation location, eg char[] in our example above.


When a type cannot be determined, a pseudo-type is created by merging the filename and the line number for the allocation:





About Running and Cumulative values (R & C)


Some of the columns make reference to R or C values.


Running (R) values increase with each allocation and then decrease with deallocations, thus giving a snapshot of the live or current state.


Cumulative (C) figures only ever increase, ignoring deallocations, so give a quantitative extent of overall or historical activity.




R Total and C Total


Although not first in the column order, these two values are used to calculate some of the other column values.


R Total instructionStep the running total gives the total size of all live objects of each type


C Total instructionStep the cumulative total tells you how much of each type has ever been allocated





R Size and C size


R Size instructionStep the running size for each object type is R Total / Count - i.e. the average size of all live objects





C Size instructionStep the cumulative size for each object type is C Total / Cumulative - i.e. the average size of all allocated objects whether live or freed




For objects with a fixed size these values will both always be the size of the object.


Objects with an average size calculation have the value prefixed with (Av.):





Count, Max and Cumulative


Count instructionStep the number of live objects of each type, so in our example the count increases and decreases, resulting in an overall increase of 2


Max instructionStep the maximum value that the count ever reaches - i.e. the peak number of live objects at any one time


Cumulative instructionStep increases with every single allocation, giving a historical total.





Percentage contributions: % R Size, % C Size and % Objects


The percentage figures give an indication of how important each type is relative to others:


% R Size instructionStep the percentage of total live object sizes represented by each type i.e. the contribution of R Total for each object to that of all object types combined


% C Size instructionStep similar to above but for cumulative figures - the contribution of each C Total to that of all object types combined


% Objects instructionStep the contribution of each object count to the combined counts of all objects



Sequence numbers: Seq 1, Add Seq, Del Seq and Cur Seq


The sequence numbers show significant event sequence ids relating to each object type:


Seq 1 instructionStep the first allocation sequence id for each object type


Add Seq instructionStep the sequence id for the most recent allocation

Del Seq instructionStep the sequence id for the most recent deallocation


If no objects of a type have ever been deleted, the value just shows a hyphen


Cur Seq instructionStep the most recent event sequence id related to each object type - usually the greater of Add Seq or Del Seq




Looking at the values for the range Seq 1 to Cur Seq helps give an indication of the span of activity of each object type.



Event sequence id markers


The four sequence id columns show markers visualizing the event's position relative to the the total number of events so far.


Each row shows green markers denoting the relative position of the first and most recent sequence ids for the object type.


In the following example there have been approximately 3000 events to date:




These markers can help you see the relative timing and order of object type allocation and deallocation much more quickly than scanning through the numbers alone.



Object activity


The 'activity' of an object type is the span between its first allocation id and the most recent event sequence id at which at least one object was still live.


The Activity column in the view shows a graph of that lifespan, with the value being the number of events spanned:




Below are some examples of what the activity graph means, where:


Start corresponds to the first known event in the target program

Now indicates the most recent event sequence id for any event in the target program


Example 1: Some objects of the given type have been allocated, but none freed





Example 2: Some objects of the given type have been allocated, and all have been freed





Example 3: Some objects of the given type have been allocated. Some of those have been freed, but not all




Sorting columns


Sorted columns are shown yellow. Just click on the column header to change the sorting column or it's sort direction order.




The sorted column takes effect in each of the five object tab views, Thread, DLL, etc.



Object tab options


Each of the five object tab views has different options at the top, with Tag Tracker Macro having none.


objects-thread-options   objects-dll-options   objects-wm-options   objects-tag-options


The first two tabs allow you to choose a single Thread or DLL for which to show object types used.


The Memory tab topic describes use of the Watermark and Tracker options in detail.


The following options are common to all five tabs:




Updating the display


Refresh instructionStep updates the display - as does the refresh button on the Tools menu and toolbar


With an update interval set to Never, you'll need to use this Refresh button to update the display.


Update Interval (s) instructionStep automatically updates the display at your choice of interval between 0.1 and 60 seconds - or never!





Allocator instructionStep updates the display to show types allocated by the specified allocator


The allocator can be one of the values in this table. The default is All.



All types

All Native Memory

All native memory types

All Native Handles

All native handle types

All .Net

All .Net types


All types from CRT allocations


All types from HeapAlloc allocations


All types from LocalAlloc allocations


All types from GlobalAlloc allocations


All types from SysAllocString allocations


All types from CoTaskMemAlloc allocations


All types from allocations tracked by IMalloc


All types from NetAPI allocations


All types from Misc allocations


All types from VirtualAlloc allocations


All types from VirtualAllocEx allocations


All types from VirtualAllocVlm allocations

User Defined (API)

All types from allocations reported by the User Defined Types API

Custom Hook

All types from allocations tracked by the Custom Hooks settings


All types from COM allocations

Com AddRef

All types from COM AddRef tracking


All types from OpenGL allocations


All types from Crypt API allocations


All types from handles not represented by other allocators in this list

GDI Handles

All types from GDI handle allocations

USER32 Handles

All types from USER32 handle allocations

Internet Handles

All types from internet related allocations (socket, WinHttp...)

Printer Handles

All types from WinSpool allocations


All types from Fortran allocations


All types from Delphi allocations

.Net Objects

All types from .Net objects

.Net Large Objects

All types from .Net large objects (>= 85,000 bytes in size)

.Net Handles

All types from .Net handles

.Net VTables

All types from .Net VTables



Local filters and settings


Filter... instructionStep shows the local filters dialog for the types tab, allowing you to fine tune what is included or excluded from the display


 The filter button also indicates the number of local filters, although not all of these may be enabled



seeAlsoSee also the popup menu options to create filters based on the selected object type


See the Data Highlighting settings dialog to set the appearance of rows in the table depending on the object count and whether it's increasing or decreasing




Types view popup menuright_mouse_button


The following popup menu is available over the data area to allow filter creation or data drill-down.





right_mouse_buttonMenu option: Filters


Filter By Type instructionStep creates a filter using the selected object type, so that it is removed from the view

Filter By Size instructionStep creates a filter based on the size of the selected object so all rows with an object type of this size are removed


Filters created this way are added to the local filters dialog where they can be modified or removed.


note Filters apply to each of the five object tabs and do not affect the values in each column - only whether the object type is actually shown in the view.



right_mouse_buttonMenu option: Showing locations - drilling down into the data


The following three options all open the Analysis Tab, adding a callstack for every allocation or deallocation of the selected object type.


This enables a deeper inspection of where and how instances of an object type is allocated or freed.


Show Allocation Locations instructionStep shows allocations only

Show Deallocation Locations instructionStep shows deallocations only

Show Allocation and Deallocation Locations instructionStep shows both


For example, showing allocations for the following row in the Types tab will show the callstacks for six allocations of various sizes in the Analysis tab below: