Date: Tue, 10 Dec 2013 15:47:14 -0800 From: David Wolfskill <david@catwhisker.org> To: hiren panchasara <hiren.panchasara@gmail.com> Cc: freebsd-dtrace@freebsd.org Subject: Re: Examples from www.dtracebook.com Message-ID: <20131210234714.GQ1681@albert.catwhisker.org> In-Reply-To: <CALCpEUFnwN%2BmwTDyq-_q3x8jkk8EBfzMMyRzVeHDrHq=j-nqVg@mail.gmail.com> References: <CALCpEUFnwN%2BmwTDyq-_q3x8jkk8EBfzMMyRzVeHDrHq=j-nqVg@mail.gmail.com>
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--gblAvmLjk8yGG9If Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: quoted-printable On Tue, Dec 10, 2013 at 03:43:16PM -0800, hiren panchasara wrote: > http://www.dtracebook.com/index.php/Introduction_to_DTrace:read-syscall.d >=20 > $ sudo dtrace -n 'syscall::read:entry /execname !=3D "dtrace"/ { > @reads[execname, fds[arg0].fi_pathname] =3D count(); }' > dtrace: invalid probe specifier syscall::read:entry /execname !=3D > "dtrace"/ { @reads[execname, fds[arg0].fi_pathname] =3D count(); }: in > action list: fds has not yet been declared or assigned >=20 > This is on FreeBSD -head. >=20 >=20 > $ sudo dtrace -l | grep " read entry" > 49341 syscall freebsd32 read entry > 50413 syscall freebsd read entry >=20 > What am I missing? What does "invalid probe specifier " mean here? > .... Exactly what the message says: "fds has not yet been declared or assigned". We don't presently have the fds array -- see p. 131 of the book. Peace, david --=20 David H. Wolfskill david@catwhisker.org Taliban: Evil cowards with guns afraid of truth from a 14-year old girl. See http://www.catwhisker.org/~david/publickey.gpg for my public key. --gblAvmLjk8yGG9If Content-Type: application/pgp-signature -----BEGIN PGP SIGNATURE----- Version: GnuPG v2.0.22 (FreeBSD) iQJ8BAEBCgBmBQJSp6gBXxSAAAAAAC4AKGlzc3Vlci1mcHJAbm90YXRpb25zLm9w ZW5wZ3AuZmlmdGhob3JzZW1hbi5uZXQ4RThEMDY4QTIxMjc1MDZFRDIzODYzRTc4 QTY3RjlDOERFRjQxOTNCAAoJEIpn+cje9Bk7CgAP/3Mldbj1RNv2bvG4kttnmK2k +jOt/NO9UG4S/wlQHX+VmkXXwv7DG9cT1WGO/kKwN+klnLXrtVAubWc+fpCbmHJ3 vc53gud5soEyhSIeFNnlmdhrnERyytVPC29hnCDcLaiOr7oVzbQYfNqJn4rbBJL8 6S6iEgzDMsFcuaS+v20ga4h/cenA/6NUyb97s9lWowdlmU2E+JS5v4i370NLrp43 scBFmCJjrWCklo9SvXTjtMSL/+Rsnhx1ZySXVuBXG8D48wXtic899F+GSPamJ53n FeyRwbCU/P/siJ08U2u9lCzTH4XN3f0Ys4StrFhEBhbKFpana/9CG4DA1CT/Mkw7 hoYTa/scJ+9ab4HhYHPuW9+3kgNcAnPsZO42gMqrNaT6rIMmvrD+HZ6mWQYVzWcl OVsWdN5IQv1kdF1w4mxD8CO0LoSZUnR+A/GPd5OS8a+W+bRuoHvT+IhZGSiA2R4+ TA030LwkAeK/R/cpemF09ZOAu43P5oCK5qOqlbEBTg96GgzjhuH4hfIHhwpWAYTj TxjKf4nkJqkbfELhw87ix0mOUyj/4cE0YuH3NrzF0/utAb+AW0Cey3w+RDGcpecS pzHc1jSMuu+tc3DoRVw8HMoyuPnp6QTEeiZY/vHLkutn/xoLp+GWsDx43fZ6Pp+x y+bKn8KZqmq21XaI+3m4 =lmaP -----END PGP SIGNATURE----- --gblAvmLjk8yGG9If--
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