1 /*
2 * Copyright (C) 2007 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 * http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16 #include <time.h>
17 #include <stdio.h>
18 #ifdef HAVE_PTHREADS
19 #include <pthread.h>
20 #endif
21 #include <unistd.h>
22 #include <errno.h>
23 #include <fcntl.h>
24 #include <string.h>
25 #include <stdlib.h>
26 #include <stdarg.h>
27 #include <sys/types.h>
28 #include <sys/stat.h>
29
30 #include <cutils/logger.h>
31 #include <cutils/logd.h>
32 #include <cutils/log.h>
33
34 #define LOG_BUF_SIZE 1024
35
36 #if FAKE_LOG_DEVICE
37 // This will be defined when building for the host.
38 #define log_open(pathname, flags) fakeLogOpen(pathname, flags)
39 #define log_writev(filedes, vector, count) fakeLogWritev(filedes, vector, count)
40 #define log_close(filedes) fakeLogClose(filedes)
41 #else
42 #define log_open(pathname, flags) open(pathname, (flags) | O_CLOEXEC)
43 #define log_writev(filedes, vector, count) writev(filedes, vector, count)
44 #define log_close(filedes) close(filedes)
45 #endif
46
47 static int __write_to_log_init(log_id_t, struct iovec *vec, size_t nr);
48 static int (*write_to_log)(log_id_t, struct iovec *vec, size_t nr) = __write_to_log_init;
49 #ifdef HAVE_PTHREADS
50 static pthread_mutex_t log_init_lock = PTHREAD_MUTEX_INITIALIZER;
51 #endif
52
53 static int log_fds[(int)LOG_ID_MAX] = { -1, -1, -1, -1 };
54
55 /*
56 * This is used by the C++ code to decide if it should write logs through
57 * the C code. Basically, if /dev/log/... is available, we're running in
58 * the simulator rather than a desktop tool and want to use the device.
59 */
60 static enum {
61 kLogUninitialized, kLogNotAvailable, kLogAvailable
62 } g_log_status = kLogUninitialized;
__android_log_dev_available(void)63 int __android_log_dev_available(void)
64 {
65 if (g_log_status == kLogUninitialized) {
66 if (access("/dev/"LOGGER_LOG_MAIN, W_OK) == 0)
67 g_log_status = kLogAvailable;
68 else
69 g_log_status = kLogNotAvailable;
70 }
71
72 return (g_log_status == kLogAvailable);
73 }
74
__write_to_log_null(log_id_t log_fd,struct iovec * vec,size_t nr)75 static int __write_to_log_null(log_id_t log_fd, struct iovec *vec, size_t nr)
76 {
77 return -1;
78 }
79
__write_to_log_kernel(log_id_t log_id,struct iovec * vec,size_t nr)80 static int __write_to_log_kernel(log_id_t log_id, struct iovec *vec, size_t nr)
81 {
82 ssize_t ret;
83 int log_fd;
84
85 if (/*(int)log_id >= 0 &&*/ (int)log_id < (int)LOG_ID_MAX) {
86 log_fd = log_fds[(int)log_id];
87 } else {
88 return EBADF;
89 }
90
91 do {
92 ret = log_writev(log_fd, vec, nr);
93 } while (ret < 0 && errno == EINTR);
94
95 return ret;
96 }
97
__write_to_log_init(log_id_t log_id,struct iovec * vec,size_t nr)98 static int __write_to_log_init(log_id_t log_id, struct iovec *vec, size_t nr)
99 {
100 #ifdef HAVE_PTHREADS
101 pthread_mutex_lock(&log_init_lock);
102 #endif
103
104 if (write_to_log == __write_to_log_init) {
105 log_fds[LOG_ID_MAIN] = log_open("/dev/"LOGGER_LOG_MAIN, O_WRONLY);
106 log_fds[LOG_ID_RADIO] = log_open("/dev/"LOGGER_LOG_RADIO, O_WRONLY);
107 log_fds[LOG_ID_EVENTS] = log_open("/dev/"LOGGER_LOG_EVENTS, O_WRONLY);
108 log_fds[LOG_ID_SYSTEM] = log_open("/dev/"LOGGER_LOG_SYSTEM, O_WRONLY);
109
110 write_to_log = __write_to_log_kernel;
111
112 if (log_fds[LOG_ID_MAIN] < 0 || log_fds[LOG_ID_RADIO] < 0 ||
113 log_fds[LOG_ID_EVENTS] < 0) {
114 log_close(log_fds[LOG_ID_MAIN]);
115 log_close(log_fds[LOG_ID_RADIO]);
116 log_close(log_fds[LOG_ID_EVENTS]);
117 log_fds[LOG_ID_MAIN] = -1;
118 log_fds[LOG_ID_RADIO] = -1;
119 log_fds[LOG_ID_EVENTS] = -1;
120 write_to_log = __write_to_log_null;
121 }
122
123 if (log_fds[LOG_ID_SYSTEM] < 0) {
124 log_fds[LOG_ID_SYSTEM] = log_fds[LOG_ID_MAIN];
125 }
126 }
127
128 #ifdef HAVE_PTHREADS
129 pthread_mutex_unlock(&log_init_lock);
130 #endif
131
132 return write_to_log(log_id, vec, nr);
133 }
134
__android_log_write(int prio,const char * tag,const char * msg)135 int __android_log_write(int prio, const char *tag, const char *msg)
136 {
137 struct iovec vec[3];
138 log_id_t log_id = LOG_ID_MAIN;
139 char tmp_tag[32];
140
141 if (!tag)
142 tag = "";
143
144 /* XXX: This needs to go! */
145 if (!strcmp(tag, "HTC_RIL") ||
146 !strncmp(tag, "RIL", 3) || /* Any log tag with "RIL" as the prefix */
147 !strncmp(tag, "IMS", 3) || /* Any log tag with "IMS" as the prefix */
148 !strcmp(tag, "AT") ||
149 !strcmp(tag, "GSM") ||
150 !strcmp(tag, "STK") ||
151 !strcmp(tag, "CDMA") ||
152 !strcmp(tag, "PHONE") ||
153 !strcmp(tag, "SMS")) {
154 log_id = LOG_ID_RADIO;
155 // Inform third party apps/ril/radio.. to use Rlog or RLOG
156 snprintf(tmp_tag, sizeof(tmp_tag), "use-Rlog/RLOG-%s", tag);
157 tag = tmp_tag;
158 }
159
160 vec[0].iov_base = (unsigned char *) &prio;
161 vec[0].iov_len = 1;
162 vec[1].iov_base = (void *) tag;
163 vec[1].iov_len = strlen(tag) + 1;
164 vec[2].iov_base = (void *) msg;
165 vec[2].iov_len = strlen(msg) + 1;
166
167 return write_to_log(log_id, vec, 3);
168 }
169
__android_log_buf_write(int bufID,int prio,const char * tag,const char * msg)170 int __android_log_buf_write(int bufID, int prio, const char *tag, const char *msg)
171 {
172 struct iovec vec[3];
173 char tmp_tag[32];
174
175 if (!tag)
176 tag = "";
177
178 /* XXX: This needs to go! */
179 if ((bufID != LOG_ID_RADIO) &&
180 (!strcmp(tag, "HTC_RIL") ||
181 !strncmp(tag, "RIL", 3) || /* Any log tag with "RIL" as the prefix */
182 !strncmp(tag, "IMS", 3) || /* Any log tag with "IMS" as the prefix */
183 !strcmp(tag, "AT") ||
184 !strcmp(tag, "GSM") ||
185 !strcmp(tag, "STK") ||
186 !strcmp(tag, "CDMA") ||
187 !strcmp(tag, "PHONE") ||
188 !strcmp(tag, "SMS"))) {
189 bufID = LOG_ID_RADIO;
190 // Inform third party apps/ril/radio.. to use Rlog or RLOG
191 snprintf(tmp_tag, sizeof(tmp_tag), "use-Rlog/RLOG-%s", tag);
192 tag = tmp_tag;
193 }
194
195 vec[0].iov_base = (unsigned char *) &prio;
196 vec[0].iov_len = 1;
197 vec[1].iov_base = (void *) tag;
198 vec[1].iov_len = strlen(tag) + 1;
199 vec[2].iov_base = (void *) msg;
200 vec[2].iov_len = strlen(msg) + 1;
201
202 return write_to_log(bufID, vec, 3);
203 }
204
__android_log_vprint(int prio,const char * tag,const char * fmt,va_list ap)205 int __android_log_vprint(int prio, const char *tag, const char *fmt, va_list ap)
206 {
207 char buf[LOG_BUF_SIZE];
208
209 vsnprintf(buf, LOG_BUF_SIZE, fmt, ap);
210
211 return __android_log_write(prio, tag, buf);
212 }
213
__android_log_print(int prio,const char * tag,const char * fmt,...)214 int __android_log_print(int prio, const char *tag, const char *fmt, ...)
215 {
216 va_list ap;
217 char buf[LOG_BUF_SIZE];
218
219 va_start(ap, fmt);
220 vsnprintf(buf, LOG_BUF_SIZE, fmt, ap);
221 va_end(ap);
222
223 return __android_log_write(prio, tag, buf);
224 }
225
__android_log_buf_print(int bufID,int prio,const char * tag,const char * fmt,...)226 int __android_log_buf_print(int bufID, int prio, const char *tag, const char *fmt, ...)
227 {
228 va_list ap;
229 char buf[LOG_BUF_SIZE];
230
231 va_start(ap, fmt);
232 vsnprintf(buf, LOG_BUF_SIZE, fmt, ap);
233 va_end(ap);
234
235 return __android_log_buf_write(bufID, prio, tag, buf);
236 }
237
__android_log_assert(const char * cond,const char * tag,const char * fmt,...)238 void __android_log_assert(const char *cond, const char *tag,
239 const char *fmt, ...)
240 {
241 char buf[LOG_BUF_SIZE];
242
243 if (fmt) {
244 va_list ap;
245 va_start(ap, fmt);
246 vsnprintf(buf, LOG_BUF_SIZE, fmt, ap);
247 va_end(ap);
248 } else {
249 /* Msg not provided, log condition. N.B. Do not use cond directly as
250 * format string as it could contain spurious '%' syntax (e.g.
251 * "%d" in "blocks%devs == 0").
252 */
253 if (cond)
254 snprintf(buf, LOG_BUF_SIZE, "Assertion failed: %s", cond);
255 else
256 strcpy(buf, "Unspecified assertion failed");
257 }
258
259 __android_log_write(ANDROID_LOG_FATAL, tag, buf);
260
261 __builtin_trap(); /* trap so we have a chance to debug the situation */
262 }
263
__android_log_bwrite(int32_t tag,const void * payload,size_t len)264 int __android_log_bwrite(int32_t tag, const void *payload, size_t len)
265 {
266 struct iovec vec[2];
267
268 vec[0].iov_base = &tag;
269 vec[0].iov_len = sizeof(tag);
270 vec[1].iov_base = (void*)payload;
271 vec[1].iov_len = len;
272
273 return write_to_log(LOG_ID_EVENTS, vec, 2);
274 }
275
276 /*
277 * Like __android_log_bwrite, but takes the type as well. Doesn't work
278 * for the general case where we're generating lists of stuff, but very
279 * handy if we just want to dump an integer into the log.
280 */
__android_log_btwrite(int32_t tag,char type,const void * payload,size_t len)281 int __android_log_btwrite(int32_t tag, char type, const void *payload,
282 size_t len)
283 {
284 struct iovec vec[3];
285
286 vec[0].iov_base = &tag;
287 vec[0].iov_len = sizeof(tag);
288 vec[1].iov_base = &type;
289 vec[1].iov_len = sizeof(type);
290 vec[2].iov_base = (void*)payload;
291 vec[2].iov_len = len;
292
293 return write_to_log(LOG_ID_EVENTS, vec, 3);
294 }
295