Very Computer

It is really a big problem....

I am writing my final year project using Motif and C under Solaris and
it should work at home with Linux too I hope...

But the progarm is now ok at Solaris, but core dump at my Linux 2.0.17
with gcc 2.7.

Following is my procedure...
1) I make a pointer to a structure which have some strings and some other
structure pointer inside. I fill up all the field under a procedure using
strdup.

2) I run a procedure to free all resources like memory for pointer.

3) Then I run step 1) again. Core dump....

No problem at Solaris at university. I can create and destroy 100 times
at Solaris without any problem. The core dump is not out at the 1st
strdup under the creation routine... One of my testing program dump at
the 3rd one and one dump at the 6th one.

What's wrong.... It true to me and I am not telling lies. Pls help.

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Bestregards
Louis Chan

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Quote:>I am writing my final year project using Motif and C under Solaris and
>it should work at home with Linux too I hope...

>But the progarm is now ok at Solaris, but core dump at my Linux 2.0.17
>with gcc 2.7.

>Following is my procedure...
>1) I make a pointer to a structure which have some strings and some other
>structure pointer inside. I fill up all the field under a procedure using
>strdup.

>2) I run a procedure to free all resources like memory for pointer.

>3) Then I run step 1) again. Core dump....

Quote:>What's wrong.... It true to me and I am not telling lies. Pls help.

Please, please, please if you want help on Usenet *show* people the
problems don't *describe* the problems!

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 >Following is my procedure...
 >1) I make a pointer to a structure which have some strings and some other
 >structure pointer inside. I fill up all the field under a procedure using
 >strdup.
 >2) I run a procedure to free all resources like memory for pointer.
 >3) Then I run step 1) again. Core dump....

Perhaps it would be nice if you included some (notice the 'some'...it
means 'relevant' :) sourcecode.

                                                                robert

Quote:>I am writing my final year project using Motif and C under Solaris and
>it should work at home with Linux too I hope...

>But the progarm is now ok at Solaris, but core dump at my Linux 2.0.17
>with gcc 2.7.

[...]

>No problem at Solaris at university. I can create and destroy 100 times
>at Solaris without any problem. The core dump is not out at the 1st
>strdup under the creation routine... One of my testing program dump at
>the 3rd one and one dump at the 6th one.

>What's wrong.... It true to me and I am not telling lies. Pls help.

You should definitely at least get a stack trace in the de* to find
out what caused the core dump -- it could have been a bus error, a seg
violation, or a couple of other things.  And also, if you're not already,
double-check the pointers that are returned by strdup() to make sure
they're getting allocated correctly (at least in your test program).

Cheers,
-M

--
Michael J. Fromberger
Composer, Guitarist, Linguist, Mediaevalist
Dartmouth College, Hanover, New Hampshire, USA