Could you please supply the full script please? It might give some clue as to
where the problem is.
I have found my mistake: "action #7" means line 7 in the probe and has
nothing to do with the parameters of the probed function. So I could
handle this NULL-problem and now my probe fires correct. This is the
(corrected) probe:
fbt::breadn_flags:entry
/self->bread && args[6] == 0/
{
this->bread_vnode = args[0];
this->bread_blkno = (unsigned long)args[1];
this->bread_inode = (struct inode *)(this->bread_vnode->v_data);
this->bread_inum = this->bread_inode->i_number;
this->bread_gj = this->bread_vnode->v_mount->mnt_gjprovider != NULL ?
stringof(this->bread_vnode->v_mount->mnt_gjprovider) : "<NULL>";
printf(" gj=%s, inum=%u, blkno=%lu\n", this->bread_gj,
this->bread_inum, this->bread_blkno );
}
and now it fires like this:
1 31371 breadn_flags:entry gj=<NULL>, inum=0, blkno=320
Thaks for help!
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