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07-28-2005 10:14 PM
07-28-2005 10:14 PM
Re: Interpreting Symbolic dump
You said:
[I] am using a variable inside a WHILE loop which is getting incremented but never initialized. Do think this should cause the error?
It certainly could. You also might not be able to reproduce the problem every time. As mentioned by Kris above, there's no telling what value an uninitialized variable might have.
Can you provide a bit more code for us? It might be helpful to see how the uninitialized variable is declared, its most recent use before the error, and the declaration of any struct object(s) it might be indexing within.
Also, where you have
DBG> go
%SYSTEM-F-ACCVIO, access violation, reason mask=01, virtual address=0000000A, PC =00003F3F, PSL=03C00000
break on unhandled exception at MY_FILE_READ\main\__17\%LINE 6144+24
6144: while(isalnum(rec_p.line_name[i][j])){
DBG> examine i
MY_FILE_READ\main\i: 0
DBG> examine j
MY_FILE_READ\main\i: 2293812
DBG>
Does the value of 2293812 look reasonable for j given the size of whatever line_name[i] points to?
Could you then give this command and see what happens:
DBG> examine rec_p.line_name[i][j]
Given the code you gave us, I wouldn't expect the values shown for i and j to give an accvio against address 10. But maybe we'll learn a little more.
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07-28-2005 10:44 PM
07-28-2005 10:44 PM
Re: Interpreting Symbolic dump
what i'll do is write a short program on the lines of my original code so that i could share with you guys. i should be able to reproduce that error again.
and i must say this forum has been very helpful in resolving my issues, thanks a bunch. i hope to get such support in future too.
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08-09-2005 11:29 PM
08-09-2005 11:29 PM
Re: Interpreting Symbolic dump
DBG> set break/exception
DBG> go
break at routine MY_FILE_READ\main
14600: int record_no = 0;
DBG> examine record_no
MY_FILE_READ\main\record_no: 2064480377
DBG>
could someone tell me what is going wrong here?
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08-09-2005 11:44 PM
08-09-2005 11:44 PM
Re: Interpreting Symbolic dump
this number looks like P1 space address:
SDA> eva ^d2064480377
Hex = 00000000.7B0D7879 Decimal = 2064480377
There is some bug in your program. Start with DBG> EXA/INS @PC-10:@PC to find the failing instruction stream.
Volker.
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08-10-2005 12:32 AM
08-10-2005 12:32 AM
Re: Interpreting Symbolic dump
> run my_file_read
DBG> EXA/INS @PC-10:@PC
%DEBUG-E-NOACCESSR, no read access to address 000000000002FFF6
DBG>
if i start off with GO and then EXA/INS, i get output as below
> run my_file_read
DBG> go
break at routine TQS_EXTRACTOR\main
14600: int record_no = 0;
DBG> exa/ins @pc-10:@pc
TQS_EXTRACTOR\main\%LINE 14592+42:
TQS_EXTRACTOR\main\%LINE 14592+46:
TQS_EXTRACTOR\main\%LINE 14592+50:
DBG>
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08-10-2005 12:41 AM
08-10-2005 12:41 AM
Re: Interpreting Symbolic dump
you have to look at the instruction stream AFTER the exception has happened. We need to see the instructions preceeding the actual exception PC:
DBG> SET LAN MACRO
DBG> EXA/INS @PC-10:@PC
Volker.
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