| /* |
| * Copyright (C) 2007-2014 The Android Open Source Project |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| #include <errno.h> |
| #include <fcntl.h> |
| #ifdef HAVE_PTHREADS |
| #include <pthread.h> |
| #endif |
| #include <stdarg.h> |
| #include <stdio.h> |
| #include <stdlib.h> |
| #include <string.h> |
| #include <sys/stat.h> |
| #include <sys/types.h> |
| #if (FAKE_LOG_DEVICE == 0) |
| #include <sys/socket.h> |
| #include <sys/un.h> |
| #endif |
| #include <time.h> |
| #include <unistd.h> |
| |
| #include <log/logd.h> |
| #include <log/logger.h> |
| #include <log/log_read.h> |
| #include <private/android_filesystem_config.h> |
| |
| #define LOG_BUF_SIZE 1024 |
| |
| #if FAKE_LOG_DEVICE |
| /* This will be defined when building for the host. */ |
| #include "fake_log_device.h" |
| #endif |
| |
| static int __write_to_log_init(log_id_t, struct iovec *vec, size_t nr); |
| static int (*write_to_log)(log_id_t, struct iovec *vec, size_t nr) = __write_to_log_init; |
| #ifdef HAVE_PTHREADS |
| static pthread_mutex_t log_init_lock = PTHREAD_MUTEX_INITIALIZER; |
| #endif |
| |
| #define UNUSED __attribute__((__unused__)) |
| |
| static int logd_fd = -1; |
| #if FAKE_LOG_DEVICE |
| #define WEAK __attribute__((weak)) |
| static int log_fds[(int)LOG_ID_MAX] = { -1, -1, -1, -1, -1 }; |
| #endif |
| |
| /* |
| * This is used by the C++ code to decide if it should write logs through |
| * the C code. Basically, if /dev/socket/logd is available, we're running in |
| * the simulator rather than a desktop tool and want to use the device. |
| */ |
| static enum { |
| kLogUninitialized, kLogNotAvailable, kLogAvailable |
| } g_log_status = kLogUninitialized; |
| int __android_log_dev_available(void) |
| { |
| if (g_log_status == kLogUninitialized) { |
| if (access("/dev/socket/logdw", W_OK) == 0) |
| g_log_status = kLogAvailable; |
| else |
| g_log_status = kLogNotAvailable; |
| } |
| |
| return (g_log_status == kLogAvailable); |
| } |
| |
| /* give up, resources too limited */ |
| static int __write_to_log_null(log_id_t log_fd UNUSED, struct iovec *vec UNUSED, |
| size_t nr UNUSED) |
| { |
| return -1; |
| } |
| |
| /* log_init_lock assumed */ |
| static int __write_to_log_initialize() |
| { |
| int i, ret = 0; |
| |
| #if FAKE_LOG_DEVICE |
| for (i = 0; i < LOG_ID_MAX; i++) { |
| char buf[sizeof("/dev/log_system")]; |
| snprintf(buf, sizeof(buf), "/dev/log_%s", android_log_id_to_name(i)); |
| log_fds[i] = fakeLogOpen(buf, O_WRONLY); |
| } |
| #else |
| if (logd_fd >= 0) { |
| i = logd_fd; |
| logd_fd = -1; |
| close(i); |
| } |
| |
| i = socket(PF_UNIX, SOCK_DGRAM, 0); |
| if (i < 0) { |
| ret = -errno; |
| write_to_log = __write_to_log_null; |
| } else if (fcntl(i, F_SETFL, O_NONBLOCK) < 0) { |
| ret = -errno; |
| close(i); |
| i = -1; |
| write_to_log = __write_to_log_null; |
| } else { |
| struct sockaddr_un un; |
| memset(&un, 0, sizeof(struct sockaddr_un)); |
| un.sun_family = AF_UNIX; |
| strcpy(un.sun_path, "/dev/socket/logdw"); |
| |
| if (connect(i, (struct sockaddr *)&un, sizeof(struct sockaddr_un)) < 0) { |
| ret = -errno; |
| close(i); |
| i = -1; |
| } |
| } |
| logd_fd = i; |
| #endif |
| |
| return ret; |
| } |
| |
| static int __write_to_log_kernel(log_id_t log_id, struct iovec *vec, size_t nr) |
| { |
| ssize_t ret; |
| #if FAKE_LOG_DEVICE |
| int log_fd; |
| |
| if (/*(int)log_id >= 0 &&*/ (int)log_id < (int)LOG_ID_MAX) { |
| log_fd = log_fds[(int)log_id]; |
| } else { |
| return -EBADF; |
| } |
| do { |
| ret = fakeLogWritev(log_fd, vec, nr); |
| if (ret < 0) { |
| ret = -errno; |
| } |
| } while (ret == -EINTR); |
| #else |
| static const unsigned header_length = 3; |
| struct iovec newVec[nr + header_length]; |
| typeof_log_id_t log_id_buf; |
| uint16_t tid; |
| struct timespec ts; |
| log_time realtime_ts; |
| size_t i, payload_size; |
| |
| if (getuid() == AID_LOGD) { |
| /* |
| * ignore log messages we send to ourself. |
| * Such log messages are often generated by libraries we depend on |
| * which use standard Android logging. |
| */ |
| return 0; |
| } |
| |
| if (logd_fd < 0) { |
| return -EBADF; |
| } |
| |
| /* |
| * struct { |
| * // what we provide |
| * typeof_log_id_t log_id; |
| * u16 tid; |
| * log_time realtime; |
| * // caller provides |
| * union { |
| * struct { |
| * char prio; |
| * char payload[]; |
| * } string; |
| * struct { |
| * uint32_t tag |
| * char payload[]; |
| * } binary; |
| * }; |
| * }; |
| */ |
| |
| log_id_buf = log_id; |
| tid = gettid(); |
| |
| newVec[0].iov_base = (unsigned char *) &log_id_buf; |
| newVec[0].iov_len = sizeof_log_id_t; |
| newVec[1].iov_base = (unsigned char *) &tid; |
| newVec[1].iov_len = sizeof(tid); |
| |
| clock_gettime(CLOCK_REALTIME, &ts); |
| realtime_ts.tv_sec = ts.tv_sec; |
| realtime_ts.tv_nsec = ts.tv_nsec; |
| |
| newVec[2].iov_base = (unsigned char *) &realtime_ts; |
| newVec[2].iov_len = sizeof(log_time); |
| |
| for (payload_size = 0, i = header_length; i < nr + header_length; i++) { |
| newVec[i].iov_base = vec[i - header_length].iov_base; |
| payload_size += newVec[i].iov_len = vec[i - header_length].iov_len; |
| |
| if (payload_size > LOGGER_ENTRY_MAX_PAYLOAD) { |
| newVec[i].iov_len -= payload_size - LOGGER_ENTRY_MAX_PAYLOAD; |
| if (newVec[i].iov_len) { |
| ++i; |
| } |
| break; |
| } |
| } |
| |
| /* |
| * The write below could be lost, but will never block. |
| * |
| * ENOTCONN occurs if logd dies. |
| * EAGAIN occurs if logd is overloaded. |
| */ |
| ret = writev(logd_fd, newVec, i); |
| if (ret < 0) { |
| ret = -errno; |
| if (ret == -ENOTCONN) { |
| #ifdef HAVE_PTHREADS |
| pthread_mutex_lock(&log_init_lock); |
| #endif |
| ret = __write_to_log_initialize(); |
| #ifdef HAVE_PTHREADS |
| pthread_mutex_unlock(&log_init_lock); |
| #endif |
| |
| if (ret < 0) { |
| return ret; |
| } |
| |
| ret = writev(logd_fd, newVec, nr + header_length); |
| if (ret < 0) { |
| ret = -errno; |
| } |
| } |
| } |
| |
| if (ret > (ssize_t)(sizeof_log_id_t + sizeof(tid) + sizeof(log_time))) { |
| ret -= sizeof_log_id_t + sizeof(tid) + sizeof(log_time); |
| } |
| #endif |
| |
| return ret; |
| } |
| |
| #if FAKE_LOG_DEVICE |
| static const char *LOG_NAME[LOG_ID_MAX] = { |
| [LOG_ID_MAIN] = "main", |
| [LOG_ID_RADIO] = "radio", |
| [LOG_ID_EVENTS] = "events", |
| [LOG_ID_SYSTEM] = "system", |
| [LOG_ID_CRASH] = "crash" |
| }; |
| |
| const WEAK char *android_log_id_to_name(log_id_t log_id) |
| { |
| if (log_id >= LOG_ID_MAX) { |
| log_id = LOG_ID_MAIN; |
| } |
| return LOG_NAME[log_id]; |
| } |
| #endif |
| |
| static int __write_to_log_init(log_id_t log_id, struct iovec *vec, size_t nr) |
| { |
| #ifdef HAVE_PTHREADS |
| pthread_mutex_lock(&log_init_lock); |
| #endif |
| |
| if (write_to_log == __write_to_log_init) { |
| int ret; |
| |
| ret = __write_to_log_initialize(); |
| if (ret < 0) { |
| #ifdef HAVE_PTHREADS |
| pthread_mutex_unlock(&log_init_lock); |
| #endif |
| return ret; |
| } |
| |
| write_to_log = __write_to_log_kernel; |
| } |
| |
| #ifdef HAVE_PTHREADS |
| pthread_mutex_unlock(&log_init_lock); |
| #endif |
| |
| return write_to_log(log_id, vec, nr); |
| } |
| |
| int __android_log_write(int prio, const char *tag, const char *msg) |
| { |
| struct iovec vec[3]; |
| log_id_t log_id = LOG_ID_MAIN; |
| char tmp_tag[32]; |
| |
| if (!tag) |
| tag = ""; |
| |
| /* XXX: This needs to go! */ |
| if (!strcmp(tag, "HTC_RIL") || |
| !strncmp(tag, "RIL", 3) || /* Any log tag with "RIL" as the prefix */ |
| !strncmp(tag, "IMS", 3) || /* Any log tag with "IMS" as the prefix */ |
| !strcmp(tag, "AT") || |
| !strcmp(tag, "GSM") || |
| !strcmp(tag, "STK") || |
| !strcmp(tag, "CDMA") || |
| !strcmp(tag, "PHONE") || |
| !strcmp(tag, "SMS")) { |
| log_id = LOG_ID_RADIO; |
| /* Inform third party apps/ril/radio.. to use Rlog or RLOG */ |
| snprintf(tmp_tag, sizeof(tmp_tag), "use-Rlog/RLOG-%s", tag); |
| tag = tmp_tag; |
| } |
| |
| vec[0].iov_base = (unsigned char *) &prio; |
| vec[0].iov_len = 1; |
| vec[1].iov_base = (void *) tag; |
| vec[1].iov_len = strlen(tag) + 1; |
| vec[2].iov_base = (void *) msg; |
| vec[2].iov_len = strlen(msg) + 1; |
| |
| return write_to_log(log_id, vec, 3); |
| } |
| |
| int __android_log_buf_write(int bufID, int prio, const char *tag, const char *msg) |
| { |
| struct iovec vec[3]; |
| char tmp_tag[32]; |
| |
| if (!tag) |
| tag = ""; |
| |
| /* XXX: This needs to go! */ |
| if ((bufID != LOG_ID_RADIO) && |
| (!strcmp(tag, "HTC_RIL") || |
| !strncmp(tag, "RIL", 3) || /* Any log tag with "RIL" as the prefix */ |
| !strncmp(tag, "IMS", 3) || /* Any log tag with "IMS" as the prefix */ |
| !strcmp(tag, "AT") || |
| !strcmp(tag, "GSM") || |
| !strcmp(tag, "STK") || |
| !strcmp(tag, "CDMA") || |
| !strcmp(tag, "PHONE") || |
| !strcmp(tag, "SMS"))) { |
| bufID = LOG_ID_RADIO; |
| /* Inform third party apps/ril/radio.. to use Rlog or RLOG */ |
| snprintf(tmp_tag, sizeof(tmp_tag), "use-Rlog/RLOG-%s", tag); |
| tag = tmp_tag; |
| } |
| |
| vec[0].iov_base = (unsigned char *) &prio; |
| vec[0].iov_len = 1; |
| vec[1].iov_base = (void *) tag; |
| vec[1].iov_len = strlen(tag) + 1; |
| vec[2].iov_base = (void *) msg; |
| vec[2].iov_len = strlen(msg) + 1; |
| |
| return write_to_log(bufID, vec, 3); |
| } |
| |
| int __android_log_vprint(int prio, const char *tag, const char *fmt, va_list ap) |
| { |
| char buf[LOG_BUF_SIZE]; |
| |
| vsnprintf(buf, LOG_BUF_SIZE, fmt, ap); |
| |
| return __android_log_write(prio, tag, buf); |
| } |
| |
| int __android_log_print(int prio, const char *tag, const char *fmt, ...) |
| { |
| va_list ap; |
| char buf[LOG_BUF_SIZE]; |
| |
| va_start(ap, fmt); |
| vsnprintf(buf, LOG_BUF_SIZE, fmt, ap); |
| va_end(ap); |
| |
| return __android_log_write(prio, tag, buf); |
| } |
| |
| int __android_log_buf_print(int bufID, int prio, const char *tag, const char *fmt, ...) |
| { |
| va_list ap; |
| char buf[LOG_BUF_SIZE]; |
| |
| va_start(ap, fmt); |
| vsnprintf(buf, LOG_BUF_SIZE, fmt, ap); |
| va_end(ap); |
| |
| return __android_log_buf_write(bufID, prio, tag, buf); |
| } |
| |
| void __android_log_assert(const char *cond, const char *tag, |
| const char *fmt, ...) |
| { |
| char buf[LOG_BUF_SIZE]; |
| |
| if (fmt) { |
| va_list ap; |
| va_start(ap, fmt); |
| vsnprintf(buf, LOG_BUF_SIZE, fmt, ap); |
| va_end(ap); |
| } else { |
| /* Msg not provided, log condition. N.B. Do not use cond directly as |
| * format string as it could contain spurious '%' syntax (e.g. |
| * "%d" in "blocks%devs == 0"). |
| */ |
| if (cond) |
| snprintf(buf, LOG_BUF_SIZE, "Assertion failed: %s", cond); |
| else |
| strcpy(buf, "Unspecified assertion failed"); |
| } |
| |
| #if __BIONIC__ |
| // Ensure debuggerd gets to see what went wrong by keeping the C library in the loop. |
| extern __noreturn void __android_fatal(const char* tag, const char* format, ...) __printflike(2, 3); |
| __android_fatal(tag ? tag : "", "%s", buf); |
| #else |
| __android_log_write(ANDROID_LOG_FATAL, tag, buf); |
| __builtin_trap(); /* trap so we have a chance to debug the situation */ |
| #endif |
| /* NOTREACHED */ |
| } |
| |
| int __android_log_bwrite(int32_t tag, const void *payload, size_t len) |
| { |
| struct iovec vec[2]; |
| |
| vec[0].iov_base = &tag; |
| vec[0].iov_len = sizeof(tag); |
| vec[1].iov_base = (void*)payload; |
| vec[1].iov_len = len; |
| |
| return write_to_log(LOG_ID_EVENTS, vec, 2); |
| } |
| |
| /* |
| * Like __android_log_bwrite, but takes the type as well. Doesn't work |
| * for the general case where we're generating lists of stuff, but very |
| * handy if we just want to dump an integer into the log. |
| */ |
| int __android_log_btwrite(int32_t tag, char type, const void *payload, |
| size_t len) |
| { |
| struct iovec vec[3]; |
| |
| vec[0].iov_base = &tag; |
| vec[0].iov_len = sizeof(tag); |
| vec[1].iov_base = &type; |
| vec[1].iov_len = sizeof(type); |
| vec[2].iov_base = (void*)payload; |
| vec[2].iov_len = len; |
| |
| return write_to_log(LOG_ID_EVENTS, vec, 3); |
| } |
