common/dtrace/dtrace.c

165 static dtrace_probe_t	**dtrace_probes;	/* array of all probes */
166 static int		dtrace_nprobes;		/* number of probes */
172 static dtrace_hash_t	*dtrace_bymod;		/* probes hashed by module */
173 static dtrace_hash_t	*dtrace_byfunc;		/* probes hashed by function */
174 static dtrace_hash_t	*dtrace_byname;		/* probes hashed by name */
195  *     including enabling state, probes, ECBs, consumer state, helper state,
228  * provider of the BEGIN, END, and ERROR probes).
2772 				 * results for anchored probes.
3154 		 * probes will not activate in user contexts to which the
3186 		 * probes will not activate in user contexts to which the
3210 		 * probes will not activate in user contexts to which the
5564 	 * probes in its current context.
6167  * DTrace framework to look-up probes in, add probes to and remove probes from
6490  * These functions are used to match groups of probes, given some elements of
6832  * probes: if each field is the empty string, reset dtpk_fmatch to
7046 	 * probes, we refuse to let providers slither away, unless this
7061 	 * Attempt to destroy the probes associated with this provider.
7085 	 * All of the probes for this provider are disabled; we can safely
7111 	 * The provider's probes have been removed from the hash chains and
7159  * specified provider will fail, but its probes will not be removed.
7193  * Remove all the unenabled probes for the given provider.  This function is
7195  * -- just as many of its associated probes as it can.
7214 	 * Attempt to destroy the probes associated with this provider.
7251  * including functions to create probes, look-up probes, and call into the
7252  * providers to request that probes be provided.  Some of these functions are
7264 	dtrace_probe_t *probe, **probes;
7301 		probes = kmem_zalloc(nsize, KM_SLEEP);
7305 			dtrace_probes = probes;
7310 			bcopy(oprobes, probes, osize);
7312 			dtrace_probes = probes;
7317 			 * All CPUs are now seeing the new probes array; we can
7424  * Called to indicate that a probe -- or probes -- should be provided by a
7426  * be told to provide all of its probes.  (This is done whenever a new
7430  * to support the creation of probes on-the-fly.  (So-called _autocreated_
7431  * probes.)  If the provider is NULL, the operations will be applied to all
7631 	 * Create the probes.
7680 	 * We may have just created probes, so we must now rematch against
7795 	 * If there are providers and probes ready to go, pass them
10807 			 * probes, we kick out -- perhaps with some number of
10808 			 * them enabled.  Leaving enabled probes enabled may
10844 	 * Iterate over all retained enablings to see if any probes match
10866  * If an enabling is to be enabled without having matched probes (that is, if
10872  * enabling any probes, we create ECBs for every ECB decription, but with a
10907  * Called to indicate that probes should be provided due to retained
10910  * entry point explicitly to allow for autocreated probes.
11779 	 * set, do not permit sections relating to providers, probes, or args.
12255 			 * Make all probes in all zones visible.  However,
12415 	 * prereserved space to be the space required by the END probes.
12850 	 * Now we can safely disable and destroy any enabled probes.  Because
12851 	 * any DTRACE_PRIV_KERNEL probes may actually be slowing our progress
12853 	 * ECBs:  in the first, we disable just DTRACE_PRIV_KERNEL probes, and
13633 	 * Take a pass through the probes to check for errors.
14071 	 * Enabling probes requires that cpu_lock be held, and we cannot hold
14144 				    "enabled probes", ctl->mod_modname);
14173 	 * We've removed all of the module's probes from the hash chains and
14436 	 * probes, and then match any anonymous enabling against them.  Note
14450 		 * enable the probes.  We have to drop all of our locks, pick
14508 	 * Ask all providers to provide all their probes.