Fix a race condition for temperature_logger
It's a rare deadlock that happens on fugu when the updater exits too
fast due to a format error.
Bug: 62379170
Test: fake-ota fails gracefully without hanging.
Change-Id: Icbd6cff4f6b44ca20f4d75f8039332111f696cc5
diff --git a/install.cpp b/install.cpp
index a1f2e4f..db4ba93 100644
--- a/install.cpp
+++ b/install.cpp
@@ -27,6 +27,7 @@
#include <unistd.h>
#include <algorithm>
+#include <atomic>
#include <chrono>
#include <condition_variable>
#include <functional>
@@ -294,11 +295,12 @@
}
#endif // !AB_OTA_UPDATER
-static void log_max_temperature(int* max_temperature) {
+static void log_max_temperature(int* max_temperature, const std::atomic<bool>& logger_finished) {
CHECK(max_temperature != nullptr);
std::mutex mtx;
std::unique_lock<std::mutex> lck(mtx);
- while (finish_log_temperature.wait_for(lck, 20s) == std::cv_status::timeout) {
+ while (!logger_finished.load() &&
+ finish_log_temperature.wait_for(lck, 20s) == std::cv_status::timeout) {
*max_temperature = std::max(*max_temperature, GetMaxValueFromThermalZone());
}
}
@@ -403,7 +405,8 @@
}
close(pipefd[1]);
- std::thread temperature_logger(log_max_temperature, max_temperature);
+ std::atomic<bool> logger_finished(false);
+ std::thread temperature_logger(log_max_temperature, max_temperature, std::ref(logger_finished));
*wipe_cache = false;
bool retry_update = false;
@@ -467,6 +470,7 @@
int status;
waitpid(pid, &status, 0);
+ logger_finished.store(true);
finish_log_temperature.notify_one();
temperature_logger.join();