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Maximum size of object covered by hardware breakpoint

 
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StamK



Joined: 12 Oct 2016
Posts: 120

PostPosted: Fri Nov 27, 2020 1:13 am    Post subject: Maximum size of object covered by hardware breakpoint Reply with quote

In 32bit debugger no issue.
In 64bit, when trying to set a write break (in this case a string member of a derived type), I am getting the following error
The maximum sizee of object that can be covered by a hardware breakpoint is 32-bytes. Seems to be fine for numerical members of the derived type.
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mecej4



Joined: 31 Oct 2006
Posts: 1430

PostPosted: Fri Nov 27, 2020 5:26 am    Post subject: Reply with quote

Please show the declaration(s) of the derived type(s).
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Robert



Joined: 29 Nov 2006
Posts: 352
Location: Manchester

PostPosted: Fri Nov 27, 2020 10:03 am    Post subject: Reply with quote

The error is correct in that the maximum size is 32-bytes -- and the real value is less as sdbg64 uses some of these for things like step-out.

Does it work in 32-bit mode -- i.e. does it break when required?
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StamK



Joined: 12 Oct 2016
Posts: 120

PostPosted: Fri Nov 27, 2020 11:41 am    Post subject: Reply with quote

Code:

!ftn95$free

MODULE TYPES
TYPE MITM
  SEQUENCE
  CHARACTER*260            :: NAME
  END TYPE MITM
 CONTAINS

SUBROUTINE MI_Init (MI)
  TYPE (MITM), POINTER   :: MI
   MI%NAME      =  ' '          !set a write break on variable breakpoint here
END SUBROUTINE
 
END MODULE TYPES

program testmit
  USE TYPES
  TYPE (MITM), POINTER   :: MIT=>Null()
  ALLOCATE (MIT, stat=IST);  call mi_init(MIT)
end program 

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