audioserver: log system event for binder timeouts
Add event logging in case of audioserver watchdog to help
collect statistics.
Test: make. Simulate watchdog and check events in logcat.
Change-Id: I4716852c77d56703ad5f3dfc2500f598a2b80a12
diff --git a/media/utils/TimeCheck.cpp b/media/utils/TimeCheck.cpp
new file mode 100644
index 0000000..59cf4ef
--- /dev/null
+++ b/media/utils/TimeCheck.cpp
@@ -0,0 +1,93 @@
+/*
+ * Copyright (C) 2018 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 <utils/Log.h>
+#include <media/TimeCheck.h>
+#include <media/EventLog.h>
+
+namespace android {
+
+/* static */
+sp<TimeCheck::TimeCheckThread> TimeCheck::getTimeCheckThread()
+{
+ static sp<TimeCheck::TimeCheckThread> sTimeCheckThread = new TimeCheck::TimeCheckThread();
+ return sTimeCheckThread;
+}
+
+TimeCheck::TimeCheck(const char *tag, uint32_t timeoutMs)
+ : mEndTimeNs(getTimeCheckThread()->startMonitoring(tag, timeoutMs))
+{
+}
+
+TimeCheck::~TimeCheck() {
+ getTimeCheckThread()->stopMonitoring(mEndTimeNs);
+}
+
+TimeCheck::TimeCheckThread::~TimeCheckThread()
+{
+ AutoMutex _l(mMutex);
+ requestExit();
+ mMonitorRequests.clear();
+ mCond.signal();
+}
+
+nsecs_t TimeCheck::TimeCheckThread::startMonitoring(const char *tag, uint32_t timeoutMs) {
+ Mutex::Autolock _l(mMutex);
+ nsecs_t endTimeNs = systemTime() + milliseconds(timeoutMs);
+ for (; mMonitorRequests.indexOfKey(endTimeNs) >= 0; ++endTimeNs);
+ mMonitorRequests.add(endTimeNs, tag);
+ mCond.signal();
+ return endTimeNs;
+}
+
+void TimeCheck::TimeCheckThread::stopMonitoring(nsecs_t endTimeNs) {
+ Mutex::Autolock _l(mMutex);
+ mMonitorRequests.removeItem(endTimeNs);
+ mCond.signal();
+}
+
+bool TimeCheck::TimeCheckThread::threadLoop()
+{
+ status_t status = TIMED_OUT;
+ const char *tag;
+ {
+ AutoMutex _l(mMutex);
+
+ if (exitPending()) {
+ return false;
+ }
+
+ nsecs_t endTimeNs = INT64_MAX;
+ // KeyedVector mMonitorRequests is ordered so take first entry as next timeout
+ if (mMonitorRequests.size() != 0) {
+ endTimeNs = mMonitorRequests.keyAt(0);
+ tag = mMonitorRequests.valueAt(0);
+ }
+
+ const nsecs_t waitTimeNs = endTimeNs - systemTime();
+ if (waitTimeNs > 0) {
+ status = mCond.waitRelative(mMutex, waitTimeNs);
+ }
+ }
+ if (status != NO_ERROR) {
+ LOG_EVENT_STRING(LOGTAG_AUDIO_BINDER_TIMEOUT, tag);
+ LOG_ALWAYS_FATAL("TimeCheck timeout for %s", tag);
+ }
+ return true;
+}
+
+}; // namespace android