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Hi,

I am using gdb 6.1.1 on a SuSE professional 9.1 box.=20
gcc is 3.3.3
Kernel is 2.6.4-52 custom.

Problem:

(1) Source lines get messed up
(2) Just evaluated variables, are "out of context" (may be previous =
problem)

These 2 problems render gdb unusuable and I have to resort on printfs =
for debugging.

Conditions:

Files nbssh.c, libssh.a

libssh.a: ${OBJECTS}
             ar rv libssh.a ${OBJECTS}

auth.o:  auth.c
            gcc -g -O2 -Wall -I../include/ -c -o auth.o auth.c

nbssh: nbssh.c libssh.a
            gcc -Wall -g -I. -c nbssh.c
            gcc nbssh.o libssh.a -lcrypto -lz -o nbssh

Test run (line numbers omitted):

$ gdb nbssh
> b ssh_userauth_kbdint
> r 127.0.0.1
>> Breakpoint 1 file auth.c: function  ssh_userauth_kbdint ...
>>         int err =3D 0;
> n
>> int ssh_userautrh_kbdint(SESSION *session ...)
> n
>> if (!username)
> p err
>> variable "err" not available

Source of auth.c at this point is:

int ssh_userautrh_kbdint(SESSION *session, char *username, char =
*password){
   SESSION *session1;
   int err =3D 0;

   if (!username)
   {
....

Observations:=20

Gdb seems to enter the same function twice, without the source code =
saying so. Also, variable err is initialized and within context, when it =
reaches the username conditional. Gdb should know about it.

Also I remember sometime ago that in the todo list was on fork to be =
able to follow either the child or the parent. Has this been =
implemented?

Thanks,
Nikos Balkanas
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<BODY bgColor=3D#ffffff>
<DIV><FONT size=3D2>
<DIV>
<DIV><FONT size=3D2>Hi,</FONT></DIV>
<DIV><FONT size=3D2></FONT>&nbsp;</DIV>
<DIV><FONT size=3D2>I am using gdb 6.1.1 on a SuSE professional 9.1 box. =

</FONT></DIV>
<DIV><FONT size=3D2>gcc is 3.3.3</FONT></DIV>
<DIV><FONT size=3D2>Kernel is 2.6.4-52 custom.</FONT></DIV>
<DIV><FONT size=3D2></FONT>&nbsp;</DIV>
<DIV><FONT size=3D2>Problem:</FONT></DIV>
<DIV><FONT size=3D2></FONT>&nbsp;</DIV>
<DIV><FONT size=3D2>(1) Source lines get messed up</FONT></DIV>
<DIV><FONT size=3D2>(2) Just evaluated variables,&nbsp;are "out of =
context" (may=20
be previous problem)</FONT></DIV>
<DIV><FONT size=3D2></FONT>&nbsp;</DIV>
<DIV><FONT size=3D2>These 2 problems render gdb unusuable and I have to =
resort on=20
printfs for debugging.</FONT></DIV>
<DIV>&nbsp;</DIV>
<DIV><FONT size=3D2>Conditions:</FONT></DIV>
<DIV><FONT size=3D2></FONT>&nbsp;</DIV>
<DIV><FONT size=3D2>Files nbssh.c, libssh.a</FONT></DIV>
<DIV><FONT size=3D2></FONT>&nbsp;</DIV>
<DIV><FONT size=3D2>libssh.a: ${OBJECTS}</FONT></DIV>
<DIV><FONT size=3D2>&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; =
&nbsp;&nbsp;&nbsp;&nbsp;=20
ar rv libssh.a ${OBJECTS}</FONT></DIV>
<DIV><FONT size=3D2></FONT>&nbsp;</DIV>
<DIV><FONT size=3D2>auth.o:&nbsp; auth.c</FONT></DIV>
<DIV><FONT size=3D2>&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; =
&nbsp;&nbsp;&nbsp; gcc=20
-g -O2 -Wall -I../include/ -c -o auth.o auth.c</FONT></DIV>
<DIV><FONT size=3D2></FONT>&nbsp;</DIV>
<DIV><FONT size=3D2>nbssh: nbssh.c libssh.a</FONT></DIV>
<DIV><FONT size=3D2>&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; =
&nbsp;&nbsp;&nbsp; gcc=20
-Wall -g -I. -c nbssh.c</FONT></DIV>
<DIV><FONT size=3D2>&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; =
&nbsp;&nbsp;&nbsp; gcc=20
nbssh.o libssh.a -lcrypto -lz -o nbssh</FONT></DIV>
<DIV><FONT size=3D2></FONT>&nbsp;</DIV>
<DIV><FONT size=3D2>Test run (line numbers omitted):</FONT></DIV>
<DIV><FONT size=3D2></FONT>&nbsp;</DIV>
<DIV><FONT size=3D2>$ gdb nbssh</FONT></DIV>
<DIV><FONT size=3D2>&gt; b ssh_userauth_kbdint</FONT></DIV>
<DIV><FONT size=3D2>&gt; r 127.0.0.1</FONT></DIV>
<DIV><FONT size=3D2>&gt;&gt; Breakpoint 1 file auth.c:=20
function&nbsp;&nbsp;ssh_userauth_kbdint ...</FONT></DIV>
<DIV><FONT size=3D2>&gt;&gt; &nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; int =
err =3D=20
0;</FONT></DIV>
<DIV><FONT size=3D2>&gt; n</FONT></DIV>
<DIV><FONT size=3D2>&gt;&gt; int ssh_userautrh_kbdint(SESSION *session=20
...)</FONT></DIV>
<DIV><FONT size=3D2>&gt; n</FONT></DIV>
<DIV><FONT size=3D2>&gt;&gt; if (!username)</FONT></DIV>
<DIV><FONT size=3D2>&gt; p err</FONT></DIV>
<DIV><FONT size=3D2>&gt;&gt; variable "err" not available</FONT></DIV>
<DIV><FONT size=3D2></FONT>&nbsp;</DIV>
<DIV><FONT size=3D2>Source of auth.c at this point is:</FONT></DIV>
<DIV><FONT size=3D2></FONT>&nbsp;</DIV>
<DIV><FONT size=3D2>int ssh_userautrh_kbdint(SESSION *session, char =
*username,=20
char *password){</FONT></DIV>
<DIV><FONT size=3D2>&nbsp;&nbsp; SESSION *session1;</FONT></DIV>
<DIV><FONT size=3D2>&nbsp;&nbsp; int err =3D 0;</FONT></DIV>
<DIV><FONT size=3D2></FONT>&nbsp;</DIV>
<DIV><FONT size=3D2>&nbsp;&nbsp; if (!username)</FONT></DIV>
<DIV><FONT size=3D2>&nbsp;&nbsp; {</FONT></DIV>
<DIV><FONT size=3D2>....</FONT></DIV>
<DIV><FONT size=3D2></FONT>&nbsp;</DIV>
<DIV><FONT size=3D2>Observations: </FONT></DIV>
<DIV><FONT size=3D2></FONT>&nbsp;</DIV>
<DIV><FONT size=3D2>Gdb seems to enter the same function twice, without =
the source=20
code saying so. Also, variable err is initialized and within context, =
when it=20
reaches the username conditional. Gdb should know about it.</FONT></DIV>
<DIV><FONT size=3D2></FONT>&nbsp;</DIV>
<DIV><FONT size=3D2>Also I remember sometime ago that in the todo list =
was on fork=20
to be able to follow either the child or the parent. Has this been=20
implemented?</FONT></DIV>
<DIV><FONT size=3D2></FONT>&nbsp;</DIV>
<DIV><FONT size=3D2>Thanks,</FONT></DIV>
<DIV><FONT size=3D2>Nikos =
Balkanas</FONT></DIV></DIV></FONT></DIV></BODY></HTML>

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