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Message-ID: <30c154100603300331n50a03a3dyd1c9ea7a39b4a3df@mail.gmail.com>
Date: Thu, 30 Mar 2006 11:31:00 -0000
From: "Kevin Jia" <jiaminghao@gmail.com>
To: systemtap@sourceware.org
Subject: help-inode-watch error
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inode-watch.stp  (in systemtap tutorial) source code:

probe kernel.function ("vfs_write"),
      kernel.function ("vfs_read")
{
        dev_nr =3D $file->f_dentry->d_inode->i_sb->s_dev
        inode_nr =3D $file->f_dentry->d_inode->i_ino
        if (dev_nr =3D=3D ($1 << 20 | $2) && inode_nr =3D=3D $3)
        printf ("%s(%d) %s 0x%x/%u\n",
        execname(), pid(), probefunc(), dev_nr, inode_nr)
}

but have errors about $1,$2,$3, the information:

semantic error: unable to find local '1' near pc 0xc015b304:
identifier '$1' at inode-watch.stp:7:17
semantic error: unable to find local '2' near pc 0xc015b304:
identifier '$2' at inode-watch.stp:7:28
semantic error: unable to find local '3' near pc 0xc015b304:
identifier '$3' at inode-watch.stp:7:47
semantic error: due to failed target variable resolution
semantic error: no match for probe point
         while: resolving probe point kernel.function("vfs_write")
semantic error: unable to find local '1' near pc 0xc015b096:
identifier '$1' at inode-watch.stp:7:17
semantic error: unable to find local '2' near pc 0xc015b096:
identifier '$2' at inode-watch.stp:7:28
semantic error: unable to find local '3' near pc 0xc015b096:
identifier '$3' at inode-watch.stp:7:47
semantic error: due to failed target variable resolution
semantic error: no match for probe point
         while: resolving probe point kernel.function("vfs_read")
Pass 2: analysis failed.  Try again with '-v' (verbose) option.

Why? Thank you.