1 files changed, 51 insertions, 7 deletions

diff --git a/logging_android.cc b/logging_android.cc
index d5aac6df..88b068bc 100644
--- a/logging_android.cc
+++ b/logging_android.cc
@@ -39,6 +39,12 @@
 
 using std::string;
 
+#ifdef _UE_SIDELOAD
+constexpr bool kSideload = true;
+#else
+constexpr bool kSideload = false;
+#endif
+
 namespace chromeos_update_engine {
 namespace {
 
@@ -141,13 +147,11 @@ class FileLogger {
       return;
     }
 
-    // libchrome add a newline character to |message|. Strip it.
-    std::string_view message_no_newline =
+    std::string_view message_str =
         log_message->message != nullptr ? log_message->message : "";
-    ignore_result(android::base::ConsumeSuffix(&message_no_newline, "\n"));
 
     WriteToFd(GetPrefix(log_message));
-    WriteToFd(message_no_newline);
+    WriteToFd(message_str);
     WriteToFd("\n");
   }
 
@@ -187,7 +191,13 @@ class CombinedLogger {
  public:
   CombinedLogger(bool log_to_system, bool log_to_file) {
     if (log_to_system) {
-      loggers_.push_back(__android_log_logd_logger);
+      if (kSideload) {
+        // No logd in sideload. Use stdout.
+        // recovery has already redirected stdio properly.
+        loggers_.push_back(__android_log_stderr_logger);
+      } else {
+        loggers_.push_back(__android_log_logd_logger);
+      }
     }
     if (log_to_file) {
       loggers_.push_back(std::move(FileLogger(SetupLogFile(kSystemLogsRoot))));
@@ -203,6 +213,39 @@ class CombinedLogger {
   std::vector<LoggerFunction> loggers_;
 };
 
+// Redirect all libchrome logs to liblog using our custom handler that does
+// not call __android_log_write and explicitly write to stderr at the same
+// time. The preset CombinedLogger already writes to stderr properly.
+bool RedirectToLiblog(int severity,
+                      const char* file,
+                      int line,
+                      size_t message_start,
+                      const std::string& str_newline) {
+  android_LogPriority priority =
+      (severity < 0) ? ANDROID_LOG_VERBOSE : ANDROID_LOG_UNKNOWN;
+  switch (severity) {
+    case logging::LOG_INFO:
+      priority = ANDROID_LOG_INFO;
+      break;
+    case logging::LOG_WARNING:
+      priority = ANDROID_LOG_WARN;
+      break;
+    case logging::LOG_ERROR:
+      priority = ANDROID_LOG_ERROR;
+      break;
+    case logging::LOG_FATAL:
+      priority = ANDROID_LOG_FATAL;
+      break;
+  }
+  std::string_view sv = str_newline;
+  ignore_result(android::base::ConsumeSuffix(&sv, "\n"));
+  std::string str(sv.data(), sv.size());
+  // This will eventually be redirected to CombinedLogger.
+  // |tag| is ignored by CombinedLogger, so just leave it empty.
+  __android_log_write(priority, "" /* tag */, str.c_str());
+  return true;
+}
+
 }  // namespace
 
 void SetupLogging(bool log_to_system, bool log_to_file) {
@@ -219,14 +262,15 @@ void SetupLogging(bool log_to_system, bool log_to_file) {
   // libchrome logging should not log to file.
   logging::LoggingSettings log_settings;
   log_settings.lock_log = logging::DONT_LOCK_LOG_FILE;
-  log_settings.logging_dest = static_cast<logging::LoggingDestination>(
-      logging::LOG_TO_SYSTEM_DEBUG_LOG);
+  log_settings.logging_dest =
+      static_cast<logging::LoggingDestination>(logging::LOG_NONE);
   log_settings.log_file = nullptr;
   logging::InitLogging(log_settings);
   logging::SetLogItems(false /* enable_process_id */,
                        false /* enable_thread_id */,
                        false /* enable_timestamp */,
                        false /* enable_tickcount */);
+  logging::SetLogMessageHandler(&RedirectToLiblog);
 }
 
 }  // namespace chromeos_update_engine