[Info-vax] TR_PRINT

[Robert A. Brooks]

On 3/27/2020 9:48 AM, Robert A. Brooks wrote:
> On 3/27/2020 9:10 AM, ergamenes at gmail.com wrote:
>> Beyond doing TR LOAD and TR START TRACE in SDA, is there anything else I need
>> to get TR_PRINT to start making entries? Apart from actually calling it, of
>> course.
> 
> No; that will do it.
> 
> Are you having trouble getting data into the ring buffer?

For debugging during boot . . .

To enable the capturing of data during boot (that is, before one can use SDA to LOAD and START tracing), you need to use SYSMAN to load the relevant execlet

SYSMAN> SYS_LOAD ADD TR$DEBUG TR$DEBUG/LOAD_STEP=INIT ! this command modifies SYS$UPDATE:VMS$SYSTEM_IMAGES.IDX

Once that command has been issued, issue the command

$ @SYS$UPDATE:VMS$SYSTEM_IMAGES

The above two commands only need to be issued once for a system; the effects of them are persistent across boots and VMS updates. 

-- 

                      -- Rob