Root > Reference > All Functions > MemWipeStack

Procedure MemWipeStack

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Clears unused stack of the current thread.

 

Unit

ELowLevel

 

Syntax

 

Code (Delphi)

procedure MemWipeStack;

 

Remarks

This function wipes (clears) the content of the unused part of the stack. The wipe is performed with debug pattern ( $CCCCCCCC).

 

This means that when execution goes further - the uninitialized local variables will have non-0, non-nil, unaccessible value. This can help catch use of uninitialized variables.

 

Additionally, clearing stack can help to reduce number of false-positive entries with RAW stack tracing.

 

We recommend to call this function from time to time. For example, when application is idle, or about to do some heavy work.

 

Caution!

This function clears the entire unused stack to the end. E.g. if you use 1 Mb stack (default) - then 1 Mb of memory will be written (except the busy part of the stack). Therefore, do not call this function too frequently, otherwise your performance will suffer.

 

Use with caution when stack size is greatly increased.

 

Examples

 

Code (Delphi)

procedure TForm1.ClearStackOnIdle(Sender: TObject; var Done: Boolean);

begin

MemWipeStack;

Done := True;

end;

procedure TForm1.FormCreate(Sender: TObject);

begin

Application.OnIdle := Self.ClearStackOnIdle;

end;

 




Send feedback... Build date: 2018-11-26
Last edited: 2018-11-26
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