Previous: Static Stack Usage Analysis, Up: Stack Related Facilities

8.6.3 Dynamic Stack Usage Analysis

It is possible to measure the maximum amount of stack used by a task, by adding a switch to `gnatbind', as:

    $ gnatbind -u0 file

With this option, at each task termination, its stack usage is output on stderr. It is not always convenient to output the stack usage when the program is still running. Hence, it is possible to delay this output until program termination. for a given number of tasks specified as the argument of the -u option. For instance:

    $ gnatbind -u100 file

will buffer the stack usage information of the first 100 tasks to terminate and output this info at program termination. Results are displayed in four columns:

    Index | Task Name | Stack Size | Stack Usage


The environment task stack, e.g., the stack that contains the main unit, is only processed when the environment variable GNAT_STACK_LIMIT is set.

The package GNAT.Task_Stack_Usage provides facilities to get stack usage reports at run-time. See its body for the details.