4 * The contents of this file are subject to the terms of the
5 * Common Development and Distribution License (the "License").
6 * You may not use this file except in compliance with the License.
8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
9 * or http://www.opensolaris.org/os/licensing.
10 * See the License for the specific language governing permissions
11 * and limitations under the License.
13 * When distributing Covered Code, include this CDDL HEADER in each
14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
15 * If applicable, add the following below this CDDL HEADER, with the
16 * fields enclosed by brackets "[]" replaced with your own identifying
17 * information: Portions Copyright [yyyy] [name of copyright owner]
25 #ifndef EARLY_AP_STARTUP
27 dtrace_ap_start(void *dummy)
31 mutex_enter(&cpu_lock);
33 /* Setup the rest of the CPUs. */
38 (void) dtrace_cpu_setup(CPU_CONFIG, i);
41 mutex_exit(&cpu_lock);
44 SYSINIT(dtrace_ap_start, SI_SUB_SMP, SI_ORDER_ANY, dtrace_ap_start, NULL);
48 dtrace_load(void *dummy)
50 dtrace_provider_id_t id;
51 #ifdef EARLY_AP_STARTUP
57 * DTrace uses negative logic for the destructive mode switch, so it
58 * is required to translate from the sysctl which uses positive logic.
60 if (dtrace_allow_destructive)
61 dtrace_destructive_disallow = 0;
63 dtrace_destructive_disallow = 1;
66 /* Hook into the trap handler. */
67 dtrace_trap_func = dtrace_trap;
69 /* Hang our hook for thread switches. */
70 dtrace_vtime_switch_func = dtrace_vtime_switch;
72 /* Hang our hook for exceptions. */
75 dtrace_taskq = taskq_create("dtrace_taskq", 1, maxclsyspri, 0, 0, 0);
77 dtrace_arena = new_unrhdr(1, INT_MAX, &dtrace_unr_mtx);
79 /* Register callbacks for linker file load and unload events. */
80 dtrace_kld_load_tag = EVENTHANDLER_REGISTER(kld_load,
81 dtrace_kld_load, NULL, EVENTHANDLER_PRI_ANY);
82 dtrace_kld_unload_try_tag = EVENTHANDLER_REGISTER(kld_unload_try,
83 dtrace_kld_unload_try, NULL, EVENTHANDLER_PRI_ANY);
86 * Initialise the mutexes without 'witness' because the dtrace
87 * code is mostly written to wait for memory. To have the
88 * witness code change a malloc() from M_WAITOK to M_NOWAIT
89 * because a lock is held would surely create a panic in a
90 * low memory situation. And that low memory situation might be
91 * the very problem we are trying to trace.
93 mutex_init(&dtrace_lock,"dtrace probe state", MUTEX_DEFAULT, NULL);
94 mutex_init(&dtrace_provider_lock,"dtrace provider state", MUTEX_DEFAULT, NULL);
95 mutex_init(&dtrace_meta_lock,"dtrace meta-provider state", MUTEX_DEFAULT, NULL);
97 mutex_init(&dtrace_errlock,"dtrace error lock", MUTEX_DEFAULT, NULL);
100 mutex_enter(&cpu_lock);
101 mutex_enter(&dtrace_provider_lock);
102 mutex_enter(&dtrace_lock);
104 dtrace_state_cache = kmem_cache_create("dtrace_state_cache",
105 sizeof (dtrace_dstate_percpu_t) * NCPU, DTRACE_STATE_ALIGN,
106 NULL, NULL, NULL, NULL, NULL, 0);
108 ASSERT(MUTEX_HELD(&cpu_lock));
109 dtrace_bymod = dtrace_hash_create(offsetof(dtrace_probe_t, dtpr_mod),
110 offsetof(dtrace_probe_t, dtpr_nextmod),
111 offsetof(dtrace_probe_t, dtpr_prevmod));
113 dtrace_byfunc = dtrace_hash_create(offsetof(dtrace_probe_t, dtpr_func),
114 offsetof(dtrace_probe_t, dtpr_nextfunc),
115 offsetof(dtrace_probe_t, dtpr_prevfunc));
117 dtrace_byname = dtrace_hash_create(offsetof(dtrace_probe_t, dtpr_name),
118 offsetof(dtrace_probe_t, dtpr_nextname),
119 offsetof(dtrace_probe_t, dtpr_prevname));
121 if (dtrace_retain_max < 1) {
122 cmn_err(CE_WARN, "illegal value (%lu) for dtrace_retain_max; "
123 "setting to 1", dtrace_retain_max);
124 dtrace_retain_max = 1;
128 * Now discover our toxic ranges.
130 dtrace_toxic_ranges(dtrace_toxrange_add);
133 * Before we register ourselves as a provider to our own framework,
134 * we would like to assert that dtrace_provider is NULL -- but that's
135 * not true if we were loaded as a dependency of a DTrace provider.
136 * Once we've registered, we can assert that dtrace_provider is our
139 (void) dtrace_register("dtrace", &dtrace_provider_attr,
140 DTRACE_PRIV_NONE, 0, &dtrace_provider_ops, NULL, &id);
142 ASSERT(dtrace_provider != NULL);
143 ASSERT((dtrace_provider_id_t)dtrace_provider == id);
145 dtrace_probeid_begin = dtrace_probe_create((dtrace_provider_id_t)
146 dtrace_provider, NULL, NULL, "BEGIN", 0, NULL);
147 dtrace_probeid_end = dtrace_probe_create((dtrace_provider_id_t)
148 dtrace_provider, NULL, NULL, "END", 0, NULL);
149 dtrace_probeid_error = dtrace_probe_create((dtrace_provider_id_t)
150 dtrace_provider, NULL, NULL, "ERROR", 1, NULL);
152 mutex_exit(&dtrace_lock);
153 mutex_exit(&dtrace_provider_lock);
155 #ifdef EARLY_AP_STARTUP
157 (void) dtrace_cpu_setup(CPU_CONFIG, i);
160 /* Setup the boot CPU */
161 (void) dtrace_cpu_setup(CPU_CONFIG, 0);
164 mutex_exit(&cpu_lock);
166 dtrace_dev = make_dev(&dtrace_cdevsw, 0, UID_ROOT, GID_WHEEL, 0600,
168 helper_dev = make_dev(&helper_cdevsw, 0, UID_ROOT, GID_WHEEL, 0660,