Dtracing Nvidia Graphics driver

Dtracing Nvidia Graphics driver

[Till Wegmüller]

Hello All

OpenIndiana users are again having issues with loading the vbios and I 
wanted to see if I can get better information on what is happening I 
have a function called rm_init_adapter which I want to find out if I am 
running into ABI compatibility errors or if I can start debugging from 
there. It seems to be a generic error which just records that the card 
cannot load.

Can somebody point me to some kernel debugging tools to get started 
digging into it?

Thanks
Till

Re: Dtracing Nvidia Graphics driver

[Carsten Grzemba]

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Hi Till,
normally the following script could deliver some information:
#!/usr/sbin/dtrace -s
#pragma D option flowindent

fbt:nvidia:rm_init_adapter:entry
{
    self->trace = 1;
}

fbt:nvidia:rm_init_adapter:return
/self->trace/
{
    self->trace = 0
}

fbt:nvidia::enter,
fbt:nvidia::return
{
}
Unfortunately the function rm_init_adapter is not exposed as a dtrace probe. And if you look at the disassembly of this function, you can see that the names of subfunctions that are called by rm_init_adapter are mutilate.
An other possible function to start could be nv_attach instead.

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