forums.silverfrost.com Forum Index forums.silverfrost.com
Welcome to the Silverfrost forums
 
 FAQFAQ   SearchSearch   MemberlistMemberlist   UsergroupsUsergroups   RegisterRegister 
 ProfileProfile   Log in to check your private messagesLog in to check your private messages   Log inLog in 

Inconsistent debug information, 32-bit versus 64-bit

 
Post new topic   Reply to topic    forums.silverfrost.com Forum Index -> Support
View previous topic :: View next topic  
Author Message
mecej4



Joined: 31 Oct 2006
Posts: 1430

PostPosted: Wed Nov 11, 2020 2:10 am    Post subject: Inconsistent debug information, 32-bit versus 64-bit Reply with quote

The test program below has a peculiar property: it invokes an inquiry function whose return value depends on the type rather than the value of its argument. What should we see in the debugger when such an argument is undefined and we compile with /debug?

Code:
program trigrs
   implicit none
    integer:: m
     real :: ti,param(3)
   
   ti=tiny(param(m)) ! m as well as param are undefined
   print *,ti        ! but tiny() depends on type of arg, not value
end program trigrs


When this program is compiled using v8.66 with /debug or /undef for 32-bit and opened in the v8.64 debugger, we see entries for m and param in the variables panel. In the 64-bit version, these variables are not even present in the variables panel!

Pro and con arguments could be listed for showing entries for unused/unneeded variables in the variables panel. My preference would be to see more details when debugging, since seeing 'Undefined' for variables such as m and param may help to detect bugs more easily.


Last edited by mecej4 on Thu Nov 12, 2020 2:46 am; edited 1 time in total
Back to top
View user's profile Send private message
DietmarSiepmann



Joined: 03 Jun 2013
Posts: 244

PostPosted: Wed Nov 11, 2020 12:05 pm    Post subject: Reply with quote

I agree with mecej4 and this especially for another reason: to my opinion the information given by the 64 bit version of the debugger should be the same as that of the 32 bit version whenever possible.

This would make debugging easier when porting 32 bit code to 64 bit.

In this context I would like to ask if the streams command which is supported by Salford's 32 bit debugger (sdbg) will be supported by the 64 debugger (sdbg64), too.

For sdbg64 version 8.62a the streams command is not yet supported. I like this feature very much Smile

Regards,
Dietmar
Back to top
View user's profile Send private message
DanRRight



Joined: 10 Mar 2008
Posts: 2235
Location: South Pole, Antarctica

PostPosted: Thu Nov 12, 2020 2:23 am    Post subject: Reply with quote

I thought this was fixed, but looks like it was not
Back to top
View user's profile Send private message
Display posts from previous:   
Post new topic   Reply to topic    forums.silverfrost.com Forum Index -> Support All times are GMT + 1 Hour
Page 1 of 1

 
Jump to:  
You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot vote in polls in this forum


Powered by phpBB © 2001, 2005 phpBB Group