Configuring the fatal error handler

[soja-misc at aries.uberspace.de]

Am 2015-09-16 00:49, schrieb Nick Withers:
> On Tue, 2015-09-15 at 15:58 +0200, soja-misc at aries.uberspace.de wrote:
>> Hi,
>> 
>> We have problems configuring the fatal error handler in RTEMS.
>> Following
>> the documentation we did the following:
>> 
>> void
>> fatalErrorHandler(Internal_errors_Source source, bool isInternal,
>> uint32_t errorCode);
>> 
>> rtems_extensions_table User_extensions = {
>> 	NULL,	// task_create_extension,
>> 	NULL,	// task_start_extension
>> 	NULL,	// task_restart_extension
>> 	NULL,	// task_delete_extension,
>> 	NULL,	// task_switch_extension,
>> 	NULL,	// task_begin_extension
>> 	NULL,	// task_exitted_extension
>> 	&fatalErrorHandler		// fatal_extension
>> };
>> 
>> #define CONFIGURE_INITIAL_EXTENSIONS	User_extensions
>> 
>> #define CONFIGURE_INIT
>> 
>> #include "system.h"
>> 
>> void
>> fatalErrorHandler(Internal_errors_Source source, bool isInternal,
>> uint32_t errorCode)
>> {
>> 	printf("Fatal error handler: %i, %i, %lu\n", source,
>> isInternal,
>> errorCode);
>> 	while (1)
>> 	{
>> 	}
>> }
>> 
>> "system.h" has mainly the configuration options for number of
>> tasks/semaphores/etc.
>> 
>> Now if I call rtems_fatal_error_occurred in my init task like below I
>> would expect to get a printout of the fatalErrorHandler function, but
>> I
>> only get the message from before. Is there something else necessary
>> to
>> register the error handler?
> 
> Don't know that this helps, but I use this formulation successfully on
> the MVME3100:
> ____
> 
> void fatal_extension(Internal_errors_Source the_source,
>                      bool                   is_internal,
>                      Internal_errors_t      the_error);
> 
> #define CONFIGURE_INITIAL_EXTENSIONS { .fatal = fatal_extension }

We use the c++ compiler, but if I define the extensions like this
#define CONFIGURE_INITIAL_EXTENSIONS  { NULL, NULL, NULL, NULL, NULL, 
NULL, NULL, fatalErrorHandler }

it works and the error handler is called.
Weird that it is not possible to pass the variable name...
Anyways thank you very much for the tip. Now it works.

> ____
> 
> I think a printk() would be preferred over a printf() in the handler,
> too (but am not sure about that).
> 

Thanks, I tried printk before as well, but it didn't change anything.


>> rtems_task task_system_init(rtems_task_argument /*ignored*/)
>> {
>>      printf("Do fatal error\n");
>>      rtems_fatal_error_occurred(33);
>> 
>> }
>> 
>> Best regards,
>> 
>>     Jan
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