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Full Discussion: Is there a limit for a code line length in C?
Top Forums Programming Is there a limit for a code line length in C? Post 302431666 by alex_5161 on Tuesday 22nd of June 2010 12:31:29 PM
Old 06-22-2010
I have a source where some weird condition unstably produces the Segmentation Violation.
The error could disappeared or be moved into different place by adding/removing some line of code (some printf() and additional declaration/definitions.)
By 'dbx’, I see how some variable changed unexpectedly into impossible values.
I see the resulted change when the variable is used, but I can't catch when it is happening (the variable change itself!)
It still could be a logical error in code, but working on that problem already couple weeks (before last changes it works fine when I have removed all debug-statements) I start to think about some extreme situation, related to system (maybe our, maybe the standard one.)

I have reviewed today the code with expanded all macros (thanks to JohnGraham for advise how to do that!) and I see some line after that reach 4096 characters long and I am not sure by now if the line is braked in code or it is done by the editor (I use UltraEdit )
Just realized, that it is right - the lines are braked by the editor and actually, in code they are longer: the one I have reviewed now is 4096+1537 = 5633.
There are some code lines, consist of couple of 4096-chars lines.

Therefore, I've been thinking if a long code line in some situations comes across the processing memory, having the debug option is on...

(... Writing, I've thing that the memory for code and the processing memory used in different time... and debugging information does not include the '-E'-code lines, but just references to the original source file..., but ... not completely sure if the so long lines of code is not a reson of that error ...)

Therefore, I've asked this question trying to review any possibility for that error...

If you would have some idea or advise what else I could do to catch the error, I will appreciate to hear it very much!
Last edited by alex_5161; 06-22-2010 at 01:38 PM..
 

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LEARN ABOUT REDHAT

error

error(n)						       Tcl Built-In Commands							  error(n)

__________________________________________________________________________________________________________________________________________________

NAME

       error - Generate an error

SYNOPSIS

       error message ?info? ?code?
_________________________________________________________________

DESCRIPTION

       Returns	a  TCL_ERROR  code, which causes command interpretation to be unwound.	Message is a string that is returned to the application to
       indicate what went wrong.

       If the info argument is provided and is non-empty, it is used to initialize the global variable errorInfo.  errorInfo is used to accumulate
       a stack trace of what was in progress when an error occurred; as nested commands unwind, the Tcl interpreter adds information to errorInfo.
       If the info argument is present, it is used to initialize errorInfo and the first increment of unwind information will not be added by  the
       Tcl  interpreter.   In other words, the command containing the error command will not appear in errorInfo; in its place will be info.  This
       feature is most useful in conjunction with the catch command: if a caught error cannot be handled successfully, info can be used to  return
       a stack trace reflecting the original point of occurrence of the error:
	      catch {...} errMsg
	      set savedInfo $errorInfo
	      ...
	      error $errMsg $savedInfo

       If  the	code argument is present, then its value is stored in the errorCode global variable.  This variable is intended to hold a machine-
       readable description of the error in cases where such information is available; see the tclvars manual page for information on  the  proper
       format  for the variable.  If the code argument is not present, then errorCode is automatically reset to ``NONE'' by the Tcl interpreter as
       part of processing the error generated by the command.

SEE ALSO

       catch(n), tclvars(n)

KEYWORDS

       error, errorCode, errorInfo

Tcl																	  error(n)
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