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|Home > DS-5 Debug Perspectives and Views > Expressions view|
Use the Expressions view to create and work with expressions.
If your expression contains side-effects when evaluating the expression, the results are unpredictable. Side-effects occur when the state of one or more inputs to the expression changes when the expression is evaluated.
For example, instead of
x+=1 you must use
To refresh or update the values in the view, click .
For ARMv7 in SVC mode, with 8K stack size:
(struct thread_info*)($SP_SVC &
For ARMv8 AArch64 in EL1, with 16K stack size:
(struct thread_info*)($SP_EL1 &
The following options are available from the toolbar or context menu:
Links this view to the selected connection in the Debug Control view. This is the default. Alternatively you can link the view to a different connection. If the connection you want is not shown in the drop-down list you might have to select it first in the Debug Control view.
Removes the selected expression from the list.
Removes all expressions from the list.
Copies and removes the selected expression.
Copies the selected expression.
To copy an expression for use in the Disassembly view or Memory view, first select the expression in the Name field.
Pastes expressions that you have previously cut or copied.
Deletes the selected expression.
Selects all expressions.
If the expression corresponds to a register, this displays the Registers view with that register selected.
Where enabled, this displays the Memory view with the address set to either:
The value of the selected expression, if the
value translates to an address, for example the address of an
The location of the expression, for example the
name of an array,
The memory size is set to the size of the expression,
If the selected expression is a pointer, this displays the Memory view with the address set to the value of the expression.
Where enabled, this displays the Disassembly view with the address set to the location of the expression.
Displays the MMU view and translates the address of the variable.
Enables you to add register filters to an Expressions view. Displays a sub menu that enables you to add to a specific Expressions view.
A list of formats you can use for the expression value.
The following View Menu options are available:
Displays a new instance of the Expressions view.
Enables the updating of the view when it is hidden behind other views. By default, this view does not update when hidden.
Toggles the freezing of data in the current view. This also disables and enables the Refresh option.
Right-click on the column headers to select the columns that you want displayed:
An expression that resolves to an address, such as
main+1024, or a register, for
The value of the expression. You can modify a value that has a white background. A yellow background indicates that the value has changed. This might result from you either performing a debug action such as stepping or by you editing the value directly.
If you freeze the view, then you cannot change a value.
The type associated with the value at the address identified by the expression.
The number of array or pointer elements. You can edit a pointer element count.
The size of the expression in bits.
The address in hexadecimal identified by the expression, or the name of a register, if the expression contains only a single register name.
The access type of the expression.
All columns are displayed by default.