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
55 /* Hook into the trap handler. */
56 dtrace_trap_func = dtrace_trap;
58 /* Hang our hook for thread switches. */
59 dtrace_vtime_switch_func = dtrace_vtime_switch;
61 /* Hang our hook for exceptions. */
64 dtrace_taskq = taskq_create("dtrace_taskq", 1, maxclsyspri, 0, 0, 0);
66 dtrace_arena = new_unrhdr(1, INT_MAX, &dtrace_unr_mtx);
68 /* Register callbacks for linker file load and unload events. */
69 dtrace_kld_load_tag = EVENTHANDLER_REGISTER(kld_load,
70 dtrace_kld_load, NULL, EVENTHANDLER_PRI_ANY);
71 dtrace_kld_unload_try_tag = EVENTHANDLER_REGISTER(kld_unload_try,
72 dtrace_kld_unload_try, NULL, EVENTHANDLER_PRI_ANY);
75 * Initialise the mutexes without 'witness' because the dtrace
76 * code is mostly written to wait for memory. To have the
77 * witness code change a malloc() from M_WAITOK to M_NOWAIT
78 * because a lock is held would surely create a panic in a
79 * low memory situation. And that low memory situation might be
80 * the very problem we are trying to trace.
82 mutex_init(&dtrace_lock,"dtrace probe state", MUTEX_DEFAULT, NULL);
83 mutex_init(&dtrace_provider_lock,"dtrace provider state", MUTEX_DEFAULT, NULL);
84 mutex_init(&dtrace_meta_lock,"dtrace meta-provider state", MUTEX_DEFAULT, NULL);
86 mutex_init(&dtrace_errlock,"dtrace error lock", MUTEX_DEFAULT, NULL);
89 mutex_enter(&dtrace_provider_lock);
90 mutex_enter(&dtrace_lock);
91 mutex_enter(&cpu_lock);
93 ASSERT(MUTEX_HELD(&cpu_lock));
95 dtrace_state_cache = kmem_cache_create("dtrace_state_cache",
96 sizeof (dtrace_dstate_percpu_t) * NCPU, DTRACE_STATE_ALIGN,
97 NULL, NULL, NULL, NULL, NULL, 0);
99 ASSERT(MUTEX_HELD(&cpu_lock));
100 dtrace_bymod = dtrace_hash_create(offsetof(dtrace_probe_t, dtpr_mod),
101 offsetof(dtrace_probe_t, dtpr_nextmod),
102 offsetof(dtrace_probe_t, dtpr_prevmod));
104 dtrace_byfunc = dtrace_hash_create(offsetof(dtrace_probe_t, dtpr_func),
105 offsetof(dtrace_probe_t, dtpr_nextfunc),
106 offsetof(dtrace_probe_t, dtpr_prevfunc));
108 dtrace_byname = dtrace_hash_create(offsetof(dtrace_probe_t, dtpr_name),
109 offsetof(dtrace_probe_t, dtpr_nextname),
110 offsetof(dtrace_probe_t, dtpr_prevname));
112 if (dtrace_retain_max < 1) {
113 cmn_err(CE_WARN, "illegal value (%lu) for dtrace_retain_max; "
114 "setting to 1", dtrace_retain_max);
115 dtrace_retain_max = 1;
119 * Now discover our toxic ranges.
121 dtrace_toxic_ranges(dtrace_toxrange_add);
124 * Before we register ourselves as a provider to our own framework,
125 * we would like to assert that dtrace_provider is NULL -- but that's
126 * not true if we were loaded as a dependency of a DTrace provider.
127 * Once we've registered, we can assert that dtrace_provider is our
130 (void) dtrace_register("dtrace", &dtrace_provider_attr,
131 DTRACE_PRIV_NONE, 0, &dtrace_provider_ops, NULL, &id);
133 ASSERT(dtrace_provider != NULL);
134 ASSERT((dtrace_provider_id_t)dtrace_provider == id);
136 dtrace_probeid_begin = dtrace_probe_create((dtrace_provider_id_t)
137 dtrace_provider, NULL, NULL, "BEGIN", 0, NULL);
138 dtrace_probeid_end = dtrace_probe_create((dtrace_provider_id_t)
139 dtrace_provider, NULL, NULL, "END", 0, NULL);
140 dtrace_probeid_error = dtrace_probe_create((dtrace_provider_id_t)
141 dtrace_provider, NULL, NULL, "ERROR", 1, NULL);
143 mutex_exit(&cpu_lock);
145 mutex_exit(&dtrace_lock);
146 mutex_exit(&dtrace_provider_lock);
148 mutex_enter(&cpu_lock);
150 #ifdef EARLY_AP_STARTUP
152 (void) dtrace_cpu_setup(CPU_CONFIG, i);
155 /* Setup the boot CPU */
156 (void) dtrace_cpu_setup(CPU_CONFIG, 0);
159 mutex_exit(&cpu_lock);
161 dtrace_dev = make_dev(&dtrace_cdevsw, 0, UID_ROOT, GID_WHEEL, 0600,
163 helper_dev = make_dev(&helper_cdevsw, 0, UID_ROOT, GID_WHEEL, 0660,