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Conference turris::decladebug

Title:	Digital Ladebug debugger

Moderator:	TLE::LUCIA

Created:	Fri Feb 28 1992
Last Modified:	Fri Jun 06 1997
Last Successful Update:	Fri Jun 06 1997
Number of topics:	969
Total number of notes:	3959

869.0. "watch (address) is great..." by ADA9X::BRETT () Fri Mar 07 1997 08:00

watch (address) is great!

It might be a simple 1+ to output the changed values in hex as well.

[3] The contents at address range 0x14017460 to 0x14017467
    was accessed by instruction 0x245e04b8
        Old value = 336136408	0x140908d8
        New value = 0           0x00000000

/Bevin

T.R	Title	User	Personal Name	Date	Lines
869.1		ADA9X::BRETT		`Fri Mar 07 1997 08:05`	11
	another 1+ would be to echo the original expression instead of the quickly boring boilerplate... watch (&current_needed_db) [3] Contents of 0x14017460..0x14017467 (&current_needed_db) written at $pc 0x245e04b8 Old value = 336136408 0x140908d8 New value = 0 0x00000000
869.2	Thanks for adding "watch" - it's wonderful!	WIDTH::MDAVIS	Mark Davis - compiler maniac	`Fri Mar 07 1997 13:59`	0
869.3		TLE::MURRAY	Wanfang Murray	`Fri Mar 07 1997 17:34`	5
	The suggestions sound good. We will add them for future enhancement. Wanfang
869.4		RDGENG::HAQUE	Shaheed R. Haque, 830-3531, reo2-f/b3	`Fri Mar 07 1997 18:22`	4
	>watch (address) is great! Is this supposed to be in 4.0-30?
869.5		DECCXL::OUELLETTE	crunch	`Fri Mar 07 1997 18:44`	2
	Hallway scuttlebutt is that it's in 4.0-31. Bevin gets an early copy since he's working on dst info with the ladebug team.
869.6	Can "stopi var" also use new implementation?	STEVEN::hobbs	Steven Hobbs	`Tue Mar 11 1997 14:01`	25
	I do not yet have access to a decladebug with the new watch command but I am interested in why we chose a new command name. On other Unix systems that I have used, I have executed the dbx command stopi current_need_db where decladebug requires watch (&current_need_db) Or I have used stopi (long)(0x14017460) where decladebug is using the slightly better syntax of watch (0x14017460) Now I know that different Unix dbx systems choose differing implementation techniques for stopi and I know that decladebug's choice for a stopi implementation has not been useful for my debugging. I.e., Other Unix systems have conditioned me to use stopi to find memory corruptions because this command works on other systems but my conditioning has not helped me when I migrated to decladebug. Is there any reason why decladebug cannot use the more standard stopi command to access the better implementation techniques used by the nonstandard watch command? Having the standard stopi command work as well or better than that command on competing systems would make it easy for Unix programmers to migrate their debugging skills to Digital Unix.
869.7		TLE::MURRAY	Wanfang Murray	`Tue Mar 11 1997 17:20`	9
	Well, there is no statndard dbx commands. Sun's uses stop watch command. The current stopi command has its own purpose even though it's a slow implementation. We have the similiar discussion among ourselves during the spec time too. We chose to go with watch command for clarity. Wanfang
869.8		DECC::MJHANS	Matthew Hanselman, DEC C/C++	`Fri Mar 14 1997 17:31`	8
	I remember seeing a sign in an Ann Arbor post office "Everybody remembers when I'm wrong, but nobody remembers when I'm right" The watch command is extremely useful. Tons of thanks for adding it. - Matt