Mail #12564

Back to main page of archive

Previous mail   Next mail   Unformatted/full headers
Overview  10 days   Subject   Date   Thread   Author  

From: Tom Schneider
Subject: can't get dbx to find lines
Date: 4 Aug 2005, 03:22:35

Folks:

A program of mine is giving a segmentation fault and it's hard to
locate.  So I need to compile with debugging on and then run dbx to
find the line number.

I compiled as:

    gpc \
     -g \
     --transparent-file-names \
     --no-mixed-comments \
     -Wall \
     lister.p -o lister

When I run dbx

    dbx lister

I get 

(header stuff deleted)
Reading lister
Reading ld.so.1
Reading libm.so.1
Reading libc.so.1
Reading libdl.so.1
Reading libc_psr.so.1
dbx: warning: Unknown symbol type: /home/strawberry/toms/work/lister/bug2005aug3/lister:lister.p stab #5  char:t(0,2)=@s8;-20;
dbx: warning: Unknown symbol type: /home/strawberry/toms/work/lister/bug2005aug3/lister:lister.p stab #176 Sof:S(0,192)=@s24;@S;S(0,193)=r(0,1);0000000000001;0000000000003;
dbx: warning: can't find local function 'Digit': /home/strawberry/toms/work/lister/bug2005aug3/lister:lister.p stab #265 Digit:f(0,61),Digit,Pluckdigit
dbx: warning: can't find local function 'Pluckdigit': /home/strawberry/toms/work/lister/bug2005aug3/lister:lister.p stab #291 Pluckdigit:f(0,68),Pluckdigit,Getdatetime
dbx: warning: Unknown symbol type: /home/strawberry/toms/work/lister/bug2005aug3/lister:lister.p stab #1222 tmp_string_32:(0,210)=s12Capacity:(0,4),0,32;length:(0,4),32,32;_p_schema_:(0,211)=@s8;@S;S(0,212)=r(0,1);0000000000001;0000000000001;,64,8;;
dbx: number not found at /home/strawberry/toms/work/lister/bug2005aug3/lister:lister.p stab #1222 tmp_string_32:(0,210)=s12Capacity:(0,4),0,32;length:(0,4),32,32;_p_schema_:(0,211)=@s8;@S;S(0,212)=r(0,1);0000000000001;0000000000001;,64,8;;
(/opt/SUNWspro/bin/../WS6U2/bin/sparcv9/dbx)

and then tell it to

    run

It runs fine (up to the crash):

(expected output)
signal SEGV (no mapping at the fault address) in 272 at 0x3003c
0x0003003c: 272+0x0350: ld      [%o0 + 0x4], %o1
(/opt/SUNWspro/bin/../WS6U2/bin/sparcv9/dbx) 

but for the

    line

command I always get:

    dbx: no current source file

Somehow it does not locate the Pascal source.

What (perhaps obviously trivial) thing am I missing?

(I tried xping but it was not obvious how to get it to point to the
error.  I tried workshop on this sun machine and it gave me a machine
code location.)

Maybe there is a page somewhere that says how to do this?  I didn't
find it.

    gpc -g --transparent-file-names --no-mixed-comments -Wall lister.p -o lister

The command

    files

gives

    dbx: no program

Thanks!

Tom

  Dr. Thomas D. Schneider
  National Cancer Institute
  Laboratory of Experimental and Computational Biology
  Molecular Information Theory Group
  Frederick, Maryland  21702-1201
  toms@ncifcrf.gov
  permanent email: toms@alum.mit.edu (use only if first address fails)
  http://www.lecb.ncifcrf.gov/~toms/

Previous mail   Next mail   Unformatted/full headers
Overview  10 days   Subject   Date   Thread   Author  

Replies

Back to main page of archive

Note: This page contains information that does not originate from the owner of this web site, but from the authors of the mails archived. The owner of this web site is not responsible for the content of such information. Any use of that infomation requires the consent of the respective author.

Where WWW addresses (URLs) in the mails archived are marked as hyperlinks, this is only for the comfort of the reader. The content of the web pages linked to like this does not necessarily reflect the opinion of the owner of this web site or of the authors of the mails archived. The owner of this web site is not responsible for the content of such web pages. Those pages are explicitly not to be considered as part of the content of this page, but merely as references.

This page was created by Crystal 0.999 (Linux 2.4.27/i686).