TEST(libc, __libc_android_log_event_int) {
struct logger_list *logger_list;
pid_t pid = getpid();
ASSERT_TRUE(NULL != (logger_list = android_logger_list_open(
LOG_ID_EVENTS, O_RDONLY | O_NDELAY, 1000, pid)));
struct timespec ts;
clock_gettime(CLOCK_MONOTONIC, &ts);
int value = ts.tv_nsec;
__libc_android_log_event_int(0, value);
usleep(1000000);
int count = 0;
for (;;) {
log_msg log_msg;
if (android_logger_list_read(logger_list, &log_msg) <= 0) {
break;
}
ASSERT_EQ(log_msg.entry.pid, pid);
if ((log_msg.entry.len != (4 + 1 + 4))
|| ((int)log_msg.id() != LOG_ID_EVENTS)) {
continue;
}
char *eventData = log_msg.msg();
int incoming = (eventData[0] & 0xFF) |
((eventData[1] & 0xFF) << 8) |
((eventData[2] & 0xFF) << 16) |
((eventData[3] & 0xFF) << 24);
if (incoming != 0) {
continue;
}
if (eventData[4] != EVENT_TYPE_INT) {
continue;
}
incoming = (eventData[4 + 1 + 0] & 0xFF) |
((eventData[4 + 1 + 1] & 0xFF) << 8) |
((eventData[4 + 1 + 2] & 0xFF) << 16) |
((eventData[4 + 1 + 3] & 0xFF) << 24);
if (incoming == value) {
++count;
}
}
EXPECT_EQ(1, count);
android_logger_list_close(logger_list);
}
TEST(liblog, dual_reader) {
struct logger_list *logger_list1;
// >25 messages due to liblog.__android_log_buf_print__concurrentXX above.
ASSERT_TRUE(NULL != (logger_list1 = android_logger_list_open(
LOG_ID_MAIN, O_RDONLY | O_NDELAY, 25, 0)));
struct logger_list *logger_list2;
if (NULL == (logger_list2 = android_logger_list_open(
LOG_ID_MAIN, O_RDONLY | O_NDELAY, 15, 0))) {
android_logger_list_close(logger_list1);
ASSERT_TRUE(NULL != logger_list2);
}
int count1 = 0;
bool done1 = false;
int count2 = 0;
bool done2 = false;
do {
log_msg log_msg;
if (!done1) {
if (android_logger_list_read(logger_list1, &log_msg) <= 0) {
done1 = true;
} else {
++count1;
}
}
if (!done2) {
if (android_logger_list_read(logger_list2, &log_msg) <= 0) {
done2 = true;
} else {
++count2;
}
}
} while ((!done1) || (!done2));
android_logger_list_close(logger_list1);
android_logger_list_close(logger_list2);
EXPECT_EQ(25, count1);
EXPECT_EQ(15, count2);
}
/*
* Measure the time it takes for the logd posting call to make it into
* the logs. Expect this to be less than double the process wakeup time (2ms).
*/
static void BM_log_delay(benchmark::State& state) {
pid_t pid = getpid();
struct logger_list* logger_list =
android_logger_list_open(LOG_ID_EVENTS, ANDROID_LOG_RDONLY, 0, pid);
if (!logger_list) {
fprintf(stderr, "Unable to open events log: %s\n", strerror(errno));
exit(EXIT_FAILURE);
}
signal(SIGALRM, caught_delay);
alarm(alarm_time);
while (state.KeepRunning()) {
log_time ts(CLOCK_REALTIME);
LOG_FAILURE_RETRY(android_btWriteLog(0, EVENT_TYPE_LONG, &ts, sizeof(ts)));
for (;;) {
log_msg log_msg;
int ret = android_logger_list_read(logger_list, &log_msg);
alarm(alarm_time);
if (ret <= 0) {
state.SkipWithError("android_logger_list_read");
break;
}
if ((log_msg.entry.len != (4 + 1 + 8)) ||
(log_msg.id() != LOG_ID_EVENTS)) {
continue;
}
char* eventData = log_msg.msg();
if (!eventData || (eventData[4] != EVENT_TYPE_LONG)) {
continue;
}
log_time tx(eventData + 4 + 1);
if (ts != tx) {
if (0xDEADBEEFA55A5AA6ULL == caught_convert(eventData + 4 + 1)) {
state.SkipWithError("signal");
break;
}
continue;
}
break;
}
}
state.PauseTiming();
signal(SIGALRM, SIG_DFL);
alarm(0);
android_logger_list_free(logger_list);
}
TEST(liblog, too_big_payload) {
pid_t pid = getpid();
static const char big_payload_tag[] = "TEST_big_payload_XXXX";
char tag[sizeof(big_payload_tag)];
memcpy(tag, big_payload_tag, sizeof(tag));
snprintf(tag + sizeof(tag) - 5, 5, "%04X", pid & 0xFFFF);
std::string longString(3266519, 'x');
ssize_t ret = LOG_FAILURE_RETRY(__android_log_buf_write(LOG_ID_SYSTEM,
ANDROID_LOG_INFO, tag, longString.c_str()));
struct logger_list *logger_list;
ASSERT_TRUE(NULL != (logger_list = android_logger_list_open(
LOG_ID_SYSTEM, O_RDONLY | O_NDELAY, 100, 0)));
ssize_t max_len = 0;
for(;;) {
log_msg log_msg;
if (android_logger_list_read(logger_list, &log_msg) <= 0) {
break;
}
if ((log_msg.entry.pid != pid) || (log_msg.id() != LOG_ID_SYSTEM)) {
continue;
}
char *data = log_msg.msg() + 1;
if (strcmp(data, tag)) {
continue;
}
data += strlen(data) + 1;
const char *left = data;
const char *right = longString.c_str();
while (*left && *right && (*left == *right)) {
++left;
++right;
}
if (max_len <= (left - data)) {
max_len = left - data + 1;
}
}
android_logger_list_close(logger_list);
EXPECT_LE(LOGGER_ENTRY_MAX_PAYLOAD - sizeof(big_payload_tag),
static_cast<size_t>(max_len));
EXPECT_EQ(ret, max_len + sizeof(big_payload_tag));
}
TEST(liblog, __android_log_write__android_logger_list_read) {
#ifdef __ANDROID__
pid_t pid = getpid();
struct logger_list* logger_list;
ASSERT_TRUE(
NULL !=
(logger_list = android_logger_list_open(
LOG_ID_MAIN, ANDROID_LOG_RDONLY | ANDROID_LOG_NONBLOCK, 1000, pid)));
struct timespec ts;
clock_gettime(CLOCK_MONOTONIC, &ts);
std::string buf = android::base::StringPrintf("pid=%u ts=%ld.%09ld", pid,
ts.tv_sec, ts.tv_nsec);
static const char tag[] =
"liblog.__android_log_write__android_logger_list_read";
static const char prio = ANDROID_LOG_DEBUG;
ASSERT_LT(0, __android_log_write(prio, tag, buf.c_str()));
usleep(1000000);
buf = std::string(&prio, sizeof(prio)) + tag + std::string("", 1) + buf +
std::string("", 1);
int count = 0;
for (;;) {
log_msg log_msg;
if (android_logger_list_read(logger_list, &log_msg) <= 0) break;
EXPECT_EQ(log_msg.entry.pid, pid);
// There may be a future where we leak "liblog" tagged LOG_ID_EVENT
// binary messages through so that logger losses can be correlated?
EXPECT_EQ(log_msg.id(), LOG_ID_MAIN);
if (log_msg.entry.len != buf.length()) continue;
if (buf != std::string(log_msg.msg(), log_msg.entry.len)) continue;
++count;
}
android_logger_list_close(logger_list);
EXPECT_EQ(1, count);
#else
GTEST_LOG_(INFO) << "This test does nothing.\n";
#endif
}
TEST(liblog, __android_log_btwrite__android_logger_list_read) {
struct logger_list *logger_list;
pid_t pid = getpid();
ASSERT_EQ(0, NULL == (logger_list = android_logger_list_open(
LOG_ID_EVENTS, O_RDONLY | O_NDELAY, 1000, pid)));
log_time ts(CLOCK_MONOTONIC);
ASSERT_LT(0, __android_log_btwrite(0, EVENT_TYPE_LONG, &ts, sizeof(ts)));
usleep(1000000);
int count = 0;
for (;;) {
log_msg log_msg;
if (android_logger_list_read(logger_list, &log_msg) <= 0) {
break;
}
ASSERT_EQ(log_msg.entry.pid, pid);
if ((log_msg.entry.len != (4 + 1 + 8))
|| (log_msg.id() != LOG_ID_EVENTS)) {
continue;
}
char *eventData = log_msg.msg();
if (eventData[4] != EVENT_TYPE_LONG) {
continue;
}
log_time tx(eventData + 4 + 1);
if (ts == tx) {
++count;
}
}
ASSERT_EQ(1, count);
android_logger_list_close(logger_list);
}
TEST(libc, __libc_fatal_no_abort) {
struct logger_list *logger_list;
pid_t pid = getpid();
ASSERT_TRUE(NULL != (logger_list = android_logger_list_open(
(log_id_t)LOG_ID_MAIN, O_RDONLY | O_NDELAY, 1000, pid)));
char b[80];
struct timespec ts;
clock_gettime(CLOCK_MONOTONIC, &ts);
__libc_fatal_no_abort("%u.%09u", (unsigned)ts.tv_sec, (unsigned)ts.tv_nsec);
snprintf(b, sizeof(b),"%u.%09u", (unsigned)ts.tv_sec, (unsigned)ts.tv_nsec);
usleep(1000000);
int count = 0;
for (;;) {
log_msg log_msg;
if (android_logger_list_read(logger_list, &log_msg) <= 0) {
break;
}
ASSERT_EQ(log_msg.entry.pid, pid);
if ((int)log_msg.id() != LOG_ID_MAIN) {
continue;
}
char *data = log_msg.msg();
if ((*data == ANDROID_LOG_FATAL)
&& !strcmp(data + 1, "libc")
&& !strcmp(data + 1 + strlen(data + 1) + 1, b)) {
++count;
}
}
EXPECT_EQ(1, count);
android_logger_list_close(logger_list);
}
/*
* Measure the time it takes for the logd posting call to make it into
* the logs. Expect this to be less than double the process wakeup time (2ms).
*/
static void BM_log_delay(int iters) {
pid_t pid = getpid();
struct logger_list * logger_list = android_logger_list_open(LOG_ID_EVENTS,
O_RDONLY, 0, pid);
if (!logger_list) {
fprintf(stderr, "Unable to open events log: %s\n", strerror(errno));
exit(EXIT_FAILURE);
}
signal(SIGALRM, caught_delay);
alarm(alarm_time);
StartBenchmarkTiming();
for (int i = 0; i < iters; ++i) {
log_time ts(CLOCK_REALTIME);
LOG_FAILURE_RETRY(
android_btWriteLog(0, EVENT_TYPE_LONG, &ts, sizeof(ts)));
for (;;) {
log_msg log_msg;
int ret = android_logger_list_read(logger_list, &log_msg);
alarm(alarm_time);
if (ret <= 0) {
iters = i;
break;
}
if ((log_msg.entry.len != (4 + 1 + 8))
|| (log_msg.id() != LOG_ID_EVENTS)) {
continue;
}
char* eventData = log_msg.msg();
if (eventData[4] != EVENT_TYPE_LONG) {
continue;
}
log_time tx(eventData + 4 + 1);
if (ts != tx) {
if (0xDEADBEEFA55A5AA6ULL == caught_convert(eventData + 4 + 1)) {
iters = i;
break;
}
continue;
}
break;
}
}
signal(SIGALRM, SIG_DFL);
alarm(0);
StopBenchmarkTiming();
android_logger_list_free(logger_list);
}
TEST(liblog, android_logger_list_read__cpu) {
struct logger_list *logger_list;
unsigned long long v = 0xDEADBEEFA55A0000ULL;
pid_t pid = getpid();
v += pid & 0xFFFF;
ASSERT_EQ(0, NULL == (logger_list = android_logger_list_open(
LOG_ID_EVENTS, O_RDONLY, 1000, pid)));
int count = 0;
int signals = 0;
unsigned long long uticks_start;
unsigned long long sticks_start;
get_ticks(&uticks_start, &sticks_start);
const unsigned alarm_time = 10;
memset(&signal_time, 0, sizeof(signal_time));
signal(SIGALRM, caught_blocking);
alarm(alarm_time);
signaled = 0;
do {
log_msg log_msg;
if (android_logger_list_read(logger_list, &log_msg) <= 0) {
break;
}
alarm(alarm_time);
++count;
ASSERT_EQ(log_msg.entry.pid, pid);
if ((log_msg.entry.len != (4 + 1 + 8))
|| (log_msg.id() != LOG_ID_EVENTS)) {
continue;
}
char *eventData = log_msg.msg();
if (eventData[4] != EVENT_TYPE_LONG) {
continue;
}
unsigned long long l = eventData[4 + 1 + 0] & 0xFF;
l |= (unsigned long long) (eventData[4 + 1 + 1] & 0xFF) << 8;
l |= (unsigned long long) (eventData[4 + 1 + 2] & 0xFF) << 16;
l |= (unsigned long long) (eventData[4 + 1 + 3] & 0xFF) << 24;
l |= (unsigned long long) (eventData[4 + 1 + 4] & 0xFF) << 32;
l |= (unsigned long long) (eventData[4 + 1 + 5] & 0xFF) << 40;
l |= (unsigned long long) (eventData[4 + 1 + 6] & 0xFF) << 48;
l |= (unsigned long long) (eventData[4 + 1 + 7] & 0xFF) << 56;
if (l == v) {
++signals;
break;
}
} while (!signaled || ({log_time t(CLOCK_MONOTONIC); t < signal_time;}));
void __android_log_btwrite_multiple__helper(int count) {
log_time ts(CLOCK_MONOTONIC);
struct logger_list *logger_list;
ASSERT_TRUE(NULL != (logger_list = android_logger_list_open(
LOG_ID_EVENTS, ANDROID_LOG_RDONLY | ANDROID_LOG_NONBLOCK, 1000, 0)));
log_time ts1(CLOCK_MONOTONIC);
pid_t pid = fork();
if (pid == 0) {
// child
for (int i = count; i; --i) {
ASSERT_LT(0, __android_log_btwrite(0, EVENT_TYPE_LONG, &ts, sizeof(ts)));
usleep(100);
}
ASSERT_LT(0, __android_log_btwrite(0, EVENT_TYPE_LONG, &ts1, sizeof(ts1)));
usleep(1000000);
_exit(0);
}
siginfo_t info{};
ASSERT_EQ(0, TEMP_FAILURE_RETRY(waitid(P_PID, pid, &info, WEXITED)));
int expected_count = (count < 2) ? count : 2;
int expected_chatty_count = (count <= 2) ? 0 : 1;
int expected_expire_count = (count < 2) ? 0 : (count - 2);
count = 0;
int second_count = 0;
int chatty_count = 0;
int expire_count = 0;
for (;;) {
log_msg log_msg;
if (android_logger_list_read(logger_list, &log_msg) <= 0) break;
if ((log_msg.entry.pid != pid) ||
(log_msg.entry.len < (4 + 1 + 8)) ||
(log_msg.id() != LOG_ID_EVENTS)) continue;
char *eventData = log_msg.msg();
if (!eventData) continue;
uint32_t tag = get4LE(eventData);
if ((eventData[4] == EVENT_TYPE_LONG) && (log_msg.entry.len == (4 + 1 + 8))) {
if (tag != 0) continue;
log_time tx(eventData + 4 + 1);
if (ts == tx) {
++count;
} else if (ts1 == tx) {
++second_count;
}
} else if (eventData[4] == EVENT_TYPE_STRING) {
// chatty
if (tag != 1004) continue;
++chatty_count;
// int len = get4LE(eventData + 4 + 1);
const char *cp = strstr(eventData + 4 + 1 + 4, " expire ");
if (!cp) continue;
unsigned val = 0;
sscanf(cp, " expire %u lines", &val);
expire_count += val;
}
}
EXPECT_EQ(expected_count, count);
EXPECT_EQ(1, second_count);
EXPECT_EQ(expected_chatty_count, chatty_count);
EXPECT_EQ(expected_expire_count, expire_count);
android_logger_list_close(logger_list);
}
TEST(liblog, android_logger_list_read__cpu) {
struct logger_list *logger_list;
unsigned long long v = 0xDEADBEEFA55A0000ULL;
pid_t pid = getpid();
v += pid & 0xFFFF;
ASSERT_TRUE(NULL != (logger_list = android_logger_list_open(
LOG_ID_EVENTS, O_RDONLY, 1000, pid)));
int count = 0;
int signals = 0;
unsigned long long uticks_start;
unsigned long long sticks_start;
get_ticks(&uticks_start, &sticks_start);
const unsigned alarm_time = 10;
memset(&signal_time, 0, sizeof(signal_time));
signal(SIGALRM, caught_blocking);
alarm(alarm_time);
signaled = 0;
do {
log_msg log_msg;
if (android_logger_list_read(logger_list, &log_msg) <= 0) {
break;
}
alarm(alarm_time);
++count;
ASSERT_EQ(log_msg.entry.pid, pid);
if ((log_msg.entry.len != (4 + 1 + 8))
|| (log_msg.id() != LOG_ID_EVENTS)) {
continue;
}
char *eventData = log_msg.msg();
if (eventData[4] != EVENT_TYPE_LONG) {
continue;
}
unsigned long long l = eventData[4 + 1 + 0] & 0xFF;
l |= (unsigned long long) (eventData[4 + 1 + 1] & 0xFF) << 8;
l |= (unsigned long long) (eventData[4 + 1 + 2] & 0xFF) << 16;
l |= (unsigned long long) (eventData[4 + 1 + 3] & 0xFF) << 24;
l |= (unsigned long long) (eventData[4 + 1 + 4] & 0xFF) << 32;
l |= (unsigned long long) (eventData[4 + 1 + 5] & 0xFF) << 40;
l |= (unsigned long long) (eventData[4 + 1 + 6] & 0xFF) << 48;
l |= (unsigned long long) (eventData[4 + 1 + 7] & 0xFF) << 56;
if (l == v) {
++signals;
break;
}
} while (!signaled || (log_time(CLOCK_MONOTONIC) < signal_time));
alarm(0);
signal(SIGALRM, SIG_DFL);
EXPECT_LT(1, count);
EXPECT_EQ(1, signals);
android_logger_list_close(logger_list);
unsigned long long uticks_end;
unsigned long long sticks_end;
get_ticks(&uticks_end, &sticks_end);
// Less than 1% in either user or system time, or both
const unsigned long long one_percent_ticks = alarm_time;
unsigned long long user_ticks = uticks_end - uticks_start;
unsigned long long system_ticks = sticks_end - sticks_start;
EXPECT_GT(one_percent_ticks, user_ticks);
EXPECT_GT(one_percent_ticks, system_ticks);
EXPECT_GT(one_percent_ticks, user_ticks + system_ticks);
}
/*
* Measure the time it takes for the logd posting call to acquire the
* timestamp to place into the internal record. Expect this to be less than
* 4 syscalls (3us). This test uses manual injection of timing because it is
* comparing the timestamp at send, and then picking up the corresponding log
* end-to-end long path from logd to see what actual timestamp was submitted.
*/
static void BM_log_latency(benchmark::State& state) {
pid_t pid = getpid();
struct logger_list* logger_list =
android_logger_list_open(LOG_ID_EVENTS, ANDROID_LOG_RDONLY, 0, pid);
if (!logger_list) {
fprintf(stderr, "Unable to open events log: %s\n", strerror(errno));
exit(EXIT_FAILURE);
}
signal(SIGALRM, caught_latency);
alarm(alarm_time);
for (size_t j = 0; state.KeepRunning() && j < 10 * state.iterations(); ++j) {
retry: // We allow transitory errors (logd overloaded) to be retried.
log_time ts;
LOG_FAILURE_RETRY((ts = log_time(CLOCK_REALTIME),
android_btWriteLog(0, EVENT_TYPE_LONG, &ts, sizeof(ts))));
for (;;) {
log_msg log_msg;
int ret = android_logger_list_read(logger_list, &log_msg);
alarm(alarm_time);
if (ret <= 0) {
state.SkipWithError("android_logger_list_read");
break;
}
if ((log_msg.entry.len != (4 + 1 + 8)) ||
(log_msg.id() != LOG_ID_EVENTS)) {
continue;
}
char* eventData = log_msg.msg();
if (!eventData || (eventData[4] != EVENT_TYPE_LONG)) {
continue;
}
log_time tx(eventData + 4 + 1);
if (ts != tx) {
if (0xDEADBEEFA55A5AA5ULL == caught_convert(eventData + 4 + 1)) {
state.SkipWithError("signal");
break;
}
continue;
}
uint64_t start = ts.nsec();
uint64_t end = log_msg.nsec();
if (end < start) goto retry;
state.SetIterationTime((end - start) / (double)NS_PER_SEC);
break;
}
}
signal(SIGALRM, SIG_DFL);
alarm(0);
android_logger_list_free(logger_list);
}
/*
* In class android.util.EventLog:
* static native void readEvents(int[] tags, Collection<Event> output)
*
* Reads events from the event log
*/
static void android_util_EventLog_readEvents(JNIEnv* env, jobject clazz UNUSED,
jintArray tags,
jobject out) {
if (tags == NULL || out == NULL) {
jniThrowNullPointerException(env, NULL);
return;
}
struct logger_list *logger_list = android_logger_list_open(
LOG_ID_EVENTS, ANDROID_LOG_RDONLY | ANDROID_LOG_NONBLOCK, 0, 0);
if (!logger_list) {
jniThrowIOException(env, errno);
return;
}
jsize tagLength = env->GetArrayLength(tags);
jint *tagValues = env->GetIntArrayElements(tags, NULL);
while (1) {
log_msg log_msg;
int ret = android_logger_list_read(logger_list, &log_msg);
if (ret == 0) {
break;
}
if (ret < 0) {
if (ret == -EINTR) {
continue;
}
if (ret == -EINVAL) {
jniThrowException(env, "java/io/IOException", "Event too short");
} else if (ret != -EAGAIN) {
jniThrowIOException(env, -ret); // Will throw on return
}
break;
}
if (log_msg.id() != LOG_ID_EVENTS) {
continue;
}
int32_t tag = * (int32_t *) log_msg.msg();
int found = 0;
for (int i = 0; !found && i < tagLength; ++i) {
found = (tag == tagValues[i]);
}
if (found) {
jsize len = ret;
jbyteArray array = env->NewByteArray(len);
if (array == NULL) {
break;
}
jbyte *bytes = env->GetByteArrayElements(array, NULL);
memcpy(bytes, log_msg.buf, len);
env->ReleaseByteArrayElements(array, bytes, 0);
jobject event = env->NewObject(gEventClass, gEventInitID, array);
if (event == NULL) {
