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
28 #include <cutils/logger.h>
29 #include <cutils/logd.h>
30 #include <cutils/log.h>
31
32 #define LOG_BUF_SIZE 1024
33
34 #if FAKE_LOG_DEVICE
35 // This will be defined when building for the host.
36 #define log_open(pathname, flags) fakeLogOpen(pathname, flags)
37 #define log_writev(filedes, vector, count) fakeLogWritev(filedes, vector, count)
38 #define log_close(filedes) fakeLogClose(filedes)
39 #else
40 #define log_open(pathname, flags) open(pathname, flags)
41 #define log_writev(filedes, vector, count) writev(filedes, vector, count)
42 #define log_close(filedes) close(filedes)
43 #endif
44
45 static int __write_to_log_init(log_id_t, struct iovec *vec, size_t nr);
46 static int (*write_to_log)(log_id_t, struct iovec *vec, size_t nr) = __write_to_log_init;
47 #ifdef HAVE_PTHREADS
48 static pthread_mutex_t log_init_lock = PTHREAD_MUTEX_INITIALIZER;
49 #endif
50
51 static int log_fds[(int)LOG_ID_MAX] = { -1, -1, -1, -1 };
52
53 /*
54 * This is used by the C++ code to decide if it should write logs through
55 * the C code. Basically, if /dev/log/... is available, we're running in
56 * the simulator rather than a desktop tool and want to use the device.
57 */
58 static enum {
59 kLogUninitialized, kLogNotAvailable, kLogAvailable
60 } g_log_status = kLogUninitialized;
__android_log_dev_available(void)61 int __android_log_dev_available(void)
62 {
63 if (g_log_status == kLogUninitialized) {
64 if (access("/dev/"LOGGER_LOG_MAIN, W_OK) == 0)
65 g_log_status = kLogAvailable;
66 else
67 g_log_status = kLogNotAvailable;
68 }
69
70 return (g_log_status == kLogAvailable);
71 }
72
__write_to_log_null(log_id_t log_fd,struct iovec * vec,size_t nr)73 static int __write_to_log_null(log_id_t log_fd, struct iovec *vec, size_t nr)
74 {
75 return -1;
76 }
77
__write_to_log_kernel(log_id_t log_id,struct iovec * vec,size_t nr)78 static int __write_to_log_kernel(log_id_t log_id, struct iovec *vec, size_t nr)
79 {
80 ssize_t ret;
81 int log_fd;
82
83 if (/*(int)log_id >= 0 &&*/ (int)log_id < (int)LOG_ID_MAX) {
84 log_fd = log_fds[(int)log_id];
85 } else {
86 return EBADF;
87 }
88
89 do {
90 ret = log_writev(log_fd, vec, nr);
91 } while (ret < 0 && errno == EINTR);
92
93 return ret;
94 }
95
__write_to_log_init(log_id_t log_id,struct iovec * vec,size_t nr)96 static int __write_to_log_init(log_id_t log_id, struct iovec *vec, size_t nr)
97 {
98 #ifdef HAVE_PTHREADS
99 pthread_mutex_lock(&log_init_lock);
100 #endif
101
102 if (write_to_log == __write_to_log_init) {
103 log_fds[LOG_ID_MAIN] = log_open("/dev/"LOGGER_LOG_MAIN, O_WRONLY);
104 log_fds[LOG_ID_RADIO] = log_open("/dev/"LOGGER_LOG_RADIO, O_WRONLY);
105 log_fds[LOG_ID_EVENTS] = log_open("/dev/"LOGGER_LOG_EVENTS, O_WRONLY);
106 log_fds[LOG_ID_SYSTEM] = log_open("/dev/"LOGGER_LOG_SYSTEM, O_WRONLY);
107
108 write_to_log = __write_to_log_kernel;
109
110 if (log_fds[LOG_ID_MAIN] < 0 || log_fds[LOG_ID_RADIO] < 0 ||
111 log_fds[LOG_ID_EVENTS] < 0) {
112 log_close(log_fds[LOG_ID_MAIN]);
113 log_close(log_fds[LOG_ID_RADIO]);
114 log_close(log_fds[LOG_ID_EVENTS]);
115 log_fds[LOG_ID_MAIN] = -1;
116 log_fds[LOG_ID_RADIO] = -1;
117 log_fds[LOG_ID_EVENTS] = -1;
118 write_to_log = __write_to_log_null;
119 }
120
121 if (log_fds[LOG_ID_SYSTEM] < 0) {
122 log_fds[LOG_ID_SYSTEM] = log_fds[LOG_ID_MAIN];
123 }
124 }
125
126 #ifdef HAVE_PTHREADS
127 pthread_mutex_unlock(&log_init_lock);
128 #endif
129
130 return write_to_log(log_id, vec, nr);
131 }
132
__android_log_write(int prio,const char * tag,const char * msg)133 int __android_log_write(int prio, const char *tag, const char *msg)
134 {
135 struct iovec vec[3];
136 log_id_t log_id = LOG_ID_MAIN;
137
138 if (!tag)
139 tag = "";
140
141 /* XXX: This needs to go! */
142 if (!strcmp(tag, "HTC_RIL") ||
143 !strncmp(tag, "RIL", 3) || /* Any log tag with "RIL" as the prefix */
144 !strncmp(tag, "IMS", 3) || /* Any log tag with "IMS" as the prefix */
145 !strcmp(tag, "AT") ||
146 !strcmp(tag, "GSM") ||
147 !strcmp(tag, "STK") ||
148 !strcmp(tag, "CDMA") ||
149 !strcmp(tag, "PHONE") ||
150 !strcmp(tag, "SMS"))
151 log_id = LOG_ID_RADIO;
152
153 vec[0].iov_base = (unsigned char *) &prio;
154 vec[0].iov_len = 1;
155 vec[1].iov_base = (void *) tag;
156 vec[1].iov_len = strlen(tag) + 1;
157 vec[2].iov_base = (void *) msg;
158 vec[2].iov_len = strlen(msg) + 1;
159
160 return write_to_log(log_id, vec, 3);
161 }
162
__android_log_buf_write(int bufID,int prio,const char * tag,const char * msg)163 int __android_log_buf_write(int bufID, int prio, const char *tag, const char *msg)
164 {
165 struct iovec vec[3];
166
167 if (!tag)
168 tag = "";
169
170 /* XXX: This needs to go! */
171 if (!strcmp(tag, "HTC_RIL") ||
172 !strncmp(tag, "RIL", 3) || /* Any log tag with "RIL" as the prefix */
173 !strncmp(tag, "IMS", 3) || /* Any log tag with "IMS" as the prefix */
174 !strcmp(tag, "AT") ||
175 !strcmp(tag, "GSM") ||
176 !strcmp(tag, "STK") ||
177 !strcmp(tag, "CDMA") ||
178 !strcmp(tag, "PHONE") ||
179 !strcmp(tag, "SMS"))
180 bufID = LOG_ID_RADIO;
181
182 vec[0].iov_base = (unsigned char *) &prio;
183 vec[0].iov_len = 1;
184 vec[1].iov_base = (void *) tag;
185 vec[1].iov_len = strlen(tag) + 1;
186 vec[2].iov_base = (void *) msg;
187 vec[2].iov_len = strlen(msg) + 1;
188
189 return write_to_log(bufID, vec, 3);
190 }
191
__android_log_vprint(int prio,const char * tag,const char * fmt,va_list ap)192 int __android_log_vprint(int prio, const char *tag, const char *fmt, va_list ap)
193 {
194 char buf[LOG_BUF_SIZE];
195
196 vsnprintf(buf, LOG_BUF_SIZE, fmt, ap);
197
198 return __android_log_write(prio, tag, buf);
199 }
200
__android_log_print(int prio,const char * tag,const char * fmt,...)201 int __android_log_print(int prio, const char *tag, const char *fmt, ...)
202 {
203 va_list ap;
204 char buf[LOG_BUF_SIZE];
205
206 va_start(ap, fmt);
207 vsnprintf(buf, LOG_BUF_SIZE, fmt, ap);
208 va_end(ap);
209
210 return __android_log_write(prio, tag, buf);
211 }
212
__android_log_buf_print(int bufID,int prio,const char * tag,const char * fmt,...)213 int __android_log_buf_print(int bufID, int prio, const char *tag, const char *fmt, ...)
214 {
215 va_list ap;
216 char buf[LOG_BUF_SIZE];
217
218 va_start(ap, fmt);
219 vsnprintf(buf, LOG_BUF_SIZE, fmt, ap);
220 va_end(ap);
221
222 return __android_log_buf_write(bufID, prio, tag, buf);
223 }
224
__android_log_assert(const char * cond,const char * tag,const char * fmt,...)225 void __android_log_assert(const char *cond, const char *tag,
226 const char *fmt, ...)
227 {
228 char buf[LOG_BUF_SIZE];
229
230 if (fmt) {
231 va_list ap;
232 va_start(ap, fmt);
233 vsnprintf(buf, LOG_BUF_SIZE, fmt, ap);
234 va_end(ap);
235 } else {
236 /* Msg not provided, log condition. N.B. Do not use cond directly as
237 * format string as it could contain spurious '%' syntax (e.g.
238 * "%d" in "blocks%devs == 0").
239 */
240 if (cond)
241 snprintf(buf, LOG_BUF_SIZE, "Assertion failed: %s", cond);
242 else
243 strcpy(buf, "Unspecified assertion failed");
244 }
245
246 __android_log_write(ANDROID_LOG_FATAL, tag, buf);
247
248 __builtin_trap(); /* trap so we have a chance to debug the situation */
249 }
250
__android_log_bwrite(int32_t tag,const void * payload,size_t len)251 int __android_log_bwrite(int32_t tag, const void *payload, size_t len)
252 {
253 struct iovec vec[2];
254
255 vec[0].iov_base = &tag;
256 vec[0].iov_len = sizeof(tag);
257 vec[1].iov_base = (void*)payload;
258 vec[1].iov_len = len;
259
260 return write_to_log(LOG_ID_EVENTS, vec, 2);
261 }
262
263 /*
264 * Like __android_log_bwrite, but takes the type as well. Doesn't work
265 * for the general case where we're generating lists of stuff, but very
266 * handy if we just want to dump an integer into the log.
267 */
__android_log_btwrite(int32_t tag,char type,const void * payload,size_t len)268 int __android_log_btwrite(int32_t tag, char type, const void *payload,
269 size_t len)
270 {
271 struct iovec vec[3];
272
273 vec[0].iov_base = &tag;
274 vec[0].iov_len = sizeof(tag);
275 vec[1].iov_base = &type;
276 vec[1].iov_len = sizeof(type);
277 vec[2].iov_base = (void*)payload;
278 vec[2].iov_len = len;
279
280 return write_to_log(LOG_ID_EVENTS, vec, 3);
281 }
282