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From gpc-owner@gnu.de  Thu Aug  4 09:23:22 2005
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From: Tom Schneider <toms@ncifcrf.gov>
Message-Id: <200508040722.j747MZ0r000654@strawberry.ncifcrf.gov>
To: gpc@gnu.de
Subject: can't get dbx to find lines
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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/

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