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Conference turris::ada

Title:	DEC Ada
Notice:	Ada is no longer a trademark of the US Government
Moderator:	KMOOSE::CMCCUTCHEON

Created:	Mon Jan 27 1986
Last Modified:	Fri Jun 06 1997
Last Successful Update:	Fri Jun 06 1997
Number of topics:	3874
Total number of notes:	16668

3845.0. "How can I know the stack in use in a task at run time." by AUBER::LORENZO (Philippe LORENZO: EVRY FRANCE TSSC Ultrix) Wed Feb 19 1997 05:18

    Hi,

    Using the GET_TASK_INFO package, I know how to obtain the current task's
    stack size, whith
        TOP := GET_TASK_INFO.GET_CURRENT_TASK_STACK_TOP;
        BAS := GET_TASK_INFO.GET_CURRENT_TASK_STACK_BASE;
        SIZ := BAS - TOP;

    This value is the same as shown with ada_debug> show -f 4

    But I don't know how to obtain the current "Stack in use:" ?

    Running DEC ADA.V3.3 on an Unix V4.0A system.

    Thanks for help.

Philippe.

T.R	Title	User	Personal Name	Date	Lines
3845.1	use the CMA interface	FLOYD::YODER	MFY	`Fri Feb 21 1997 10:36`	8
	There doesn't seem to be a routine in the PAL for this. An unsupported method is to use pragma Interface(C, ...) to get at the CMA routines directly--this is unsupported because, in theory, we might someday rewrite the RTL to use the POSIX interface rather than CMA. That is unlikely, but it is an option we will (probably) never officially give up. If you use this, be aware that passive tasks in effect borrow the stacks of their callers (there isn't always a 1-1 map from tasks to stacks).
3845.2	correction	FLOYD::YODER	MFY	`Fri Feb 21 1997 10:59`	4
	I have just realized that the advice in .1 is probably bad... there shouldn't be any reason you can't use the POSIX interface rather than the CMA interface for this particular operation. The CMA interface is just layered on it, and using the POSIX interface would keep working if we recoded the Ada RTL.