xref: /titanic_51/usr/src/uts/common/os/printf.c (revision f4a94ada79e5d2be49a574fa7fba9364c57b05d9)
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 /*
22  * Copyright 2009 Sun Microsystems, Inc.  All rights reserved.
23  * Use is subject to license terms.
24  */
25 
26 #include <sys/param.h>
27 #include <sys/types.h>
28 #include <sys/sysmacros.h>
29 #include <sys/inline.h>
30 #include <sys/varargs.h>
31 #include <sys/systm.h>
32 #include <sys/conf.h>
33 #include <sys/cmn_err.h>
34 #include <sys/syslog.h>
35 #include <sys/log.h>
36 #include <sys/proc.h>
37 #include <sys/vnode.h>
38 #include <sys/session.h>
39 #include <sys/stream.h>
40 #include <sys/kmem.h>
41 #include <sys/kobj.h>
42 #include <sys/atomic.h>
43 #include <sys/console.h>
44 #include <sys/cpuvar.h>
45 #include <sys/modctl.h>
46 #include <sys/reboot.h>
47 #include <sys/debug.h>
48 #include <sys/panic.h>
49 #include <sys/spl.h>
50 #include <sys/zone.h>
51 
52 /*
53  * In some debugging situations it's useful to log all messages to panicbuf,
54  * which is persistent across reboots (on most platforms).  The range
55  * panicbuf[panicbuf_log..PANICBUFSIZE-1] may be used for this purpose.
56  * By default, panicbuf_log == PANICBUFSIZE and no messages are logged.
57  * To enable panicbuf logging, set panicbuf_log to a small value, say 1K;
58  * this will reserve 1K for panic information and 7K for message logging.
59  */
60 uint32_t panicbuf_log = PANICBUFSIZE;
61 uint32_t panicbuf_index = PANICBUFSIZE;
62 
63 static int aask, aok;
64 static int ce_to_sl[CE_IGNORE] = { SL_NOTE, SL_NOTE, SL_WARN, SL_FATAL };
65 static char ce_prefix[CE_IGNORE][10] = { "", "NOTICE: ", "WARNING: ", "" };
66 static char ce_suffix[CE_IGNORE][2] = { "", "\n", "\n", "" };
67 
68 static void
69 cprintf(const char *fmt, va_list adx, int sl, const char *prefix,
70 	const char *suffix, void *site, int mid, int sid, int level,
71 	zoneid_t zoneid)
72 {
73 	uint32_t msgid;
74 	size_t bufsize = LOG_MSGSIZE;
75 	char buf[LOG_MSGSIZE];
76 	char *bufp = buf;
77 	char *body, *msgp, *bufend;
78 	mblk_t *mp;
79 	int s, on_intr;
80 	size_t len;
81 
82 	s = splhi();
83 	on_intr = CPU_ON_INTR(CPU) ||
84 	    (interrupts_unleashed && (spltoipl(s) > LOCK_LEVEL));
85 	splx(s);
86 
87 	ASSERT(zoneid == GLOBAL_ZONEID || !on_intr);
88 
89 	STRLOG_MAKE_MSGID(fmt, msgid);
90 
91 	if (strchr("^!?", fmt[0]) != NULL) {
92 		if (fmt[0] == '^')
93 			sl |= SL_CONSONLY;
94 		else if (fmt[0] == '!' ||
95 		    (prefix[0] == '\0' && !(boothowto & RB_VERBOSE)))
96 			sl = (sl & ~(SL_USER | SL_NOTE)) | SL_LOGONLY;
97 		fmt++;
98 	}
99 
100 	if ((sl & SL_USER) && (MUTEX_HELD(&pidlock) || on_intr)) {
101 		zoneid = getzoneid();
102 		sl = sl & ~(SL_USER | SL_LOGONLY) | SL_CONSOLE;
103 	}
104 
105 retry:
106 	bufend = bufp + bufsize;
107 	msgp = bufp;
108 	body = msgp += snprintf(msgp, bufend - msgp,
109 	    "%s: [ID %u FACILITY_AND_PRIORITY] ",
110 	    mod_containing_pc(site), msgid);
111 	msgp += snprintf(msgp, bufend - msgp, prefix);
112 	msgp += vsnprintf(msgp, bufend - msgp, fmt, adx);
113 	msgp += snprintf(msgp, bufend - msgp, suffix);
114 	len = strlen(body);
115 
116 	if (((sl & SL_CONSONLY) && panicstr) ||
117 	    (zoneid == GLOBAL_ZONEID && log_global.lz_active == 0)) {
118 		console_printf("%s", body);
119 		goto out;
120 	}
121 
122 	if (msgp - bufp >= bufsize && !on_intr) {
123 		ASSERT(bufp == buf);
124 		bufsize = msgp - bufp + 1;
125 		bufp = kmem_alloc(bufsize, KM_NOSLEEP);
126 		if (bufp != NULL)
127 			goto retry;
128 		bufsize = LOG_MSGSIZE;
129 		bufp = buf;
130 	}
131 
132 	mp = log_makemsg(mid, sid, level, sl, LOG_KERN, bufp,
133 	    MIN(bufsize, msgp - bufp + 1), on_intr);
134 	if (mp == NULL) {
135 		if ((sl & (SL_CONSOLE | SL_LOGONLY)) == SL_CONSOLE && !on_intr)
136 			console_printf("%s", body);
137 		goto out;
138 	}
139 
140 	if (sl & SL_USER) {
141 		ssize_t resid;
142 		sess_t *sp;
143 
144 		if ((sp = tty_hold()) != NULL) {
145 			if (sp->s_vp != NULL)
146 				(void) vn_rdwr(UIO_WRITE, sp->s_vp, body,
147 				    len, 0LL, UIO_SYSSPACE, FAPPEND,
148 				    (rlim64_t)LOG_HIWAT, kcred, &resid);
149 			tty_rele(sp);
150 		}
151 	}
152 
153 	if (on_intr && !panicstr) {
154 		(void) putq(log_intrq, mp);
155 		softcall((void (*)(void *))log_flushq, log_intrq);
156 	} else {
157 		log_sendmsg(mp, zoneid);
158 	}
159 out:
160 	if (panicbuf_log + len < PANICBUFSIZE) {
161 		uint32_t old, new;
162 		do {
163 			old = panicbuf_index;
164 			new = old + len;
165 			if (new >= PANICBUFSIZE)
166 				new = panicbuf_log + len;
167 		} while (cas32(&panicbuf_index, old, new) != old);
168 		bcopy(body, &panicbuf[new - len], len);
169 	}
170 	if (bufp != buf)
171 		kmem_free(bufp, bufsize);
172 }
173 
174 void
175 vzprintf(zoneid_t zoneid, const char *fmt, va_list adx)
176 {
177 	cprintf(fmt, adx, SL_CONSOLE | SL_NOTE, "", "", caller(), 0, 0, 0,
178 	    zoneid);
179 }
180 
181 void
182 vprintf(const char *fmt, va_list adx)
183 {
184 	vzprintf(GLOBAL_ZONEID, fmt, adx);
185 }
186 
187 /*PRINTFLIKE1*/
188 void
189 printf(const char *fmt, ...)
190 {
191 	va_list adx;
192 
193 	va_start(adx, fmt);
194 	cprintf(fmt, adx, SL_CONSOLE | SL_NOTE, "", "", caller(), 0, 0, 0,
195 	    GLOBAL_ZONEID);
196 	va_end(adx);
197 }
198 
199 /*PRINTFLIKE2*/
200 void
201 zprintf(zoneid_t zoneid, const char *fmt, ...)
202 {
203 	va_list adx;
204 
205 	va_start(adx, fmt);
206 	cprintf(fmt, adx, SL_CONSOLE | SL_NOTE, "", "", caller(), 0, 0, 0,
207 	    zoneid);
208 	va_end(adx);
209 }
210 
211 void
212 vuprintf(const char *fmt, va_list adx)
213 {
214 	va_list adxcp;
215 	va_copy(adxcp, adx);
216 
217 	/* Message the user tty, if any, and the global zone syslog */
218 	cprintf(fmt, adx, SL_CONSOLE | SL_LOGONLY | SL_USER | SL_NOTE,
219 	    "", "", caller(), 0, 0, 0, GLOBAL_ZONEID);
220 
221 	/* Now message the local zone syslog */
222 	if (!INGLOBALZONE(curproc))
223 		cprintf(fmt, adxcp, SL_CONSOLE | SL_LOGONLY | SL_NOTE,
224 		    "", "", caller(), 0, 0, 0, getzoneid());
225 
226 	va_end(adxcp);
227 }
228 
229 /*PRINTFLIKE1*/
230 void
231 uprintf(const char *fmt, ...)
232 {
233 	va_list adx;
234 
235 	va_start(adx, fmt);
236 
237 	vuprintf(fmt, adx);
238 
239 	va_end(adx);
240 }
241 
242 void
243 vzcmn_err(zoneid_t zoneid, int ce, const char *fmt, va_list adx)
244 {
245 	if (ce == CE_PANIC)
246 		vpanic(fmt, adx);
247 	if ((uint_t)ce < CE_IGNORE)
248 		cprintf(fmt, adx, ce_to_sl[ce] | SL_CONSOLE,
249 		    ce_prefix[ce], ce_suffix[ce], caller(), 0, 0, 0,
250 		    zoneid);
251 }
252 
253 void
254 vcmn_err(int ce, const char *fmt, va_list adx)
255 {
256 	vzcmn_err(GLOBAL_ZONEID, ce, fmt, adx);
257 }
258 
259 /*PRINTFLIKE2*/
260 void
261 cmn_err(int ce, const char *fmt, ...)
262 {
263 	va_list adx;
264 
265 	va_start(adx, fmt);
266 	if (ce == CE_PANIC)
267 		vpanic(fmt, adx);
268 	if ((uint_t)ce < CE_IGNORE)
269 		cprintf(fmt, adx, ce_to_sl[ce] | SL_CONSOLE,
270 		    ce_prefix[ce], ce_suffix[ce], caller(), 0, 0, 0,
271 		    GLOBAL_ZONEID);
272 	va_end(adx);
273 }
274 
275 /*PRINTFLIKE3*/
276 void
277 zcmn_err(zoneid_t zoneid, int ce, const char *fmt, ...)
278 {
279 	va_list adx;
280 
281 	va_start(adx, fmt);
282 	if (ce == CE_PANIC)
283 		vpanic(fmt, adx);
284 	if ((uint_t)ce < CE_IGNORE)
285 		cprintf(fmt, adx, ce_to_sl[ce] | SL_CONSOLE, ce_prefix[ce],
286 		    ce_suffix[ce], caller(), 0, 0, 0, zoneid);
287 	va_end(adx);
288 }
289 
290 int
291 assfail(const char *a, const char *f, int l)
292 {
293 	if (aask)  {
294 		printf("ASSERTION CAUGHT: %s, file: %s, line: %d", a, f, l);
295 		debug_enter(NULL);
296 	}
297 
298 	if (!aok && !panicstr)
299 		panic("assertion failed: %s, file: %s, line: %d", a, f, l);
300 
301 	return (0);
302 }
303 
304 void
305 assfail3(const char *a, uintmax_t lv, const char *op, uintmax_t rv,
306     const char *f, int l)
307 {
308 	if (aask)  {
309 		printf("ASSERTION CAUGHT: %s (0x%llx %s 0x%llx), file: %s, "
310 		    "line: %d", a, (u_longlong_t)lv, op, (u_longlong_t)rv,
311 		    f, l);
312 		debug_enter(NULL);
313 	}
314 
315 	if (!aok && !panicstr)
316 		panic("assertion failed: %s (0x%llx %s 0x%llx), file: %s, "
317 		    "line: %d", a, (u_longlong_t)lv, op, (u_longlong_t)rv,
318 		    f, l);
319 }
320 
321 int
322 strlog(short mid, short sid, char level, ushort_t sl, char *fmt, ...)
323 {
324 	if (sl & log_global.lz_active) {
325 		va_list adx;
326 		va_start(adx, fmt);
327 		cprintf(fmt, adx, sl, "", "", caller(), mid, sid, level,
328 		    GLOBAL_ZONEID);
329 		va_end(adx);
330 	}
331 	return (1);
332 }
333 
334 int
335 vstrlog(short mid, short sid, char level, ushort_t sl, char *fmt, va_list adx)
336 {
337 	if (sl & log_global.lz_active)
338 		cprintf(fmt, adx, sl, "", "", caller(), mid, sid, level,
339 		    GLOBAL_ZONEID);
340 	return (1);
341 }
342