H.3.2 Pragma Inspection_Point
An occurrence of a pragma Inspection_Point identifies
a set of objects each of whose values is to be available at the point(s)
during program execution corresponding to the position of the pragma
in the compilation unit. The purpose of such a pragma is to facilitate
The form of a pragma
Inspection_Point is as follows:
A pragma Inspection_Point is allowed wherever a declarative_item
is allowed. Each object_
name shall statically denote the declaration
of an object.
An inspection point
a point in the object code corresponding to the occurrence of a pragma
Inspection_Point in the compilation unit.
at an inspection point if the corresponding pragma
Inspection_Point either has an argument denoting that object, or has
no arguments and the declaration of the object is visible at the inspection
Execution of a pragma Inspection_Point has no effect.
Reaching an inspection point is an external interaction
with respect to the values of the inspectable objects at that point (see
For each inspection point, the implementation shall
identify a mapping between each inspectable object and the machine resources
(such as memory locations or registers) from which the object's value
can be obtained.
NOTE 1 The implementation is not
allowed to perform “dead store elimination” on the last assignment
to a variable prior to a point where the variable is inspectable. Thus
an inspection point has the effect of an implicit read of each of its
NOTE 2 Inspection points are useful
in maintaining a correspondence between the state of the program in source
code terms, and the machine state during the program's execution. Assertions
about the values of program objects can be tested in machine terms at
inspection points. Object code between inspection points can be processed
by automated tools to verify programs mechanically.
NOTE 3 The identification of the
mapping from source program objects to machine resources is allowed to
be in the form of an annotated object listing, in human-readable or tool-processable
Ada 2005 and 2012 Editions sponsored in part by Ada-Europe