>>> On 11/25/2009 at 11:12 AM, in message
<75fb37ae0911251012i328f8f00u5586dab199c97...@mail.gmail.com>, Sylvester Steele
<sylvesterste...@gmail.com> wrote:
>> I don't know why you would be getting a segfault on this line. Gmond
> expects the array to be NULL terminated so all you are doing is adding one
> extra entry and filling it will NULLs. With the array being NULL terminated,
> gmond doesn't have to keep track of the metric count, it only has to look for
> a NULL entry.
>>
>
>
> More modifications- and I can't figure out where the problem is.
>
> I tried
>
> gmi->name=NULL
>
> that didn't work either
>
> Then I thought I should remove the null metric and have only one metric
> like:
>
>
>
> gmi = (Ganglia_25metric*)apr_array_push(metric_info);
>
> gmi->name= apr_pstrdup (pool,"Random_Numbers_2");
> gmi->tmax=90;
> gmi->type=GANGLIA_VALUE_UNSIGNED_INT;
> gmi->msg_size= UDP_HEADER_SIZE+8;
> gmi->units= apr_pstrdup (pool,"Num");
> gmi->slope=apr_pstrdup (pool,"both");
> gmi->fmt=apr_pstrdup (pool,"%u");
> gmi->desc= apr_pstrdup (pool,"Example module metric (random numbers) 2");
> MMETRIC_INIT_METADATA(gmi, pool);
> MMETRIC_ADD_METADATA(gmi,MGROUP,"example_2");
>
> printf ("\n First metric done");
>
> /*
> gmi = (Ganglia_25metric*)apr_array_push(metric_info);
> printf ("\nStarted second metric..");
>
> gmi->name= apr_pstrdup (pool,"Constant_Number_2");
> gmi->tmax=90;
> gmi->type=GANGLIA_VALUE_UNSIGNED_INT;
> gmi->msg_size= UDP_HEADER_SIZE+8;
> gmi->units= apr_pstrdup (pool,"Num");
> gmi->slope=apr_pstrdup (pool,"zero");
> gmi->fmt=apr_pstrdup (pool,"%u");
> gmi->desc= apr_pstrdup (pool,"Example module metric (constant number) 2");
> MMETRIC_INIT_METADATA(gmi, pool);
> MMETRIC_ADD_METADATA(gmi,MGROUP,"example_2");
>
> printf ("\nSecond metric done");
> */
> //gmi = (Ganglia_25metric*)apr_array_push(metric_info);
> //printf ("\nStarted null metric");
>
> //gmi->name= apr_pstrdup (pool,NULL);
>
> //memset (gmi, 0, sizeof(*gmi));
> printf ("\nMetric initing done");
> return 0;
>
> And this gives a segfault too! And here is the output:
>
> In the ex_metric_init function
> Got first GMI
> First metric done
> Segmentation fault
>
>
> ie there is a segfault between the last and second last printf
> statements! Any clues?
>
Sorry, my only suggestion would be to run it in the debugger to get a better
idea of what is happening.
Brad
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