1 /* 2 * CDDL HEADER START 3 * 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. 7 * 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. 12 * 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] 18 * 19 * CDDL HEADER END 20 * 21 * $FreeBSD$ 22 * 23 */ 24 25 int dtrace_debug = 0; 26 TUNABLE_INT("debug.dtrace.debug", &dtrace_debug); 27 SYSCTL_INT(_debug_dtrace, OID_AUTO, debug, CTLFLAG_RW, &dtrace_debug, 0, ""); 28 29 /* Report registered DTrace providers. */ 30 static int 31 sysctl_dtrace_providers(SYSCTL_HANDLER_ARGS) 32 { 33 char *p_name = NULL; 34 dtrace_provider_t 35 *prov = dtrace_provider; 36 int error = 0; 37 size_t len = 0; 38 39 mutex_enter(&dtrace_provider_lock); 40 mutex_enter(&dtrace_lock); 41 42 /* Compute the length of the space-separated provider name string. */ 43 while (prov != NULL) { 44 len += strlen(prov->dtpv_name) + 1; 45 prov = prov->dtpv_next; 46 } 47 48 if ((p_name = kmem_alloc(len, KM_SLEEP)) == NULL) 49 error = ENOMEM; 50 else { 51 /* Start with an empty string. */ 52 *p_name = '\0'; 53 54 /* Point to the first provider again. */ 55 prov = dtrace_provider; 56 57 /* Loop through the providers, appending the names. */ 58 while (prov != NULL) { 59 if (prov != dtrace_provider) 60 (void) strlcat(p_name, " ", len); 61 62 (void) strlcat(p_name, prov->dtpv_name, len); 63 64 prov = prov->dtpv_next; 65 } 66 } 67 68 mutex_exit(&dtrace_lock); 69 mutex_exit(&dtrace_provider_lock); 70 71 if (p_name != NULL) { 72 error = sysctl_handle_string(oidp, p_name, len, req); 73 74 kmem_free(p_name, 0); 75 } 76 77 return (error); 78 } 79 80 SYSCTL_PROC(_debug_dtrace, OID_AUTO, providers, CTLTYPE_STRING | CTLFLAG_RD, 81 0, 0, sysctl_dtrace_providers, "A", ""); 82 83