adb: flush stderr after logging on Windows.
Test: set ADB_TRACE=1 & adb.exe server nodaemon
Change-Id: Ibb109618be7eaae49461a306e34ff79451ec330e
diff --git a/adb/adb_trace.cpp b/adb/adb_trace.cpp
index a8ec5fb..a024a89 100644
--- a/adb/adb_trace.cpp
+++ b/adb/adb_trace.cpp
@@ -41,6 +41,11 @@
const char* tag, const char* file, unsigned int line,
const char* message) {
android::base::StderrLogger(id, severity, tag, file, line, message);
+#if defined(_WIN32)
+ // stderr can be buffered on Windows (and setvbuf doesn't seem to work), so explicitly flush.
+ fflush(stderr);
+#endif
+
#if !ADB_HOST
// Only print logs of INFO or higher to logcat, so that `adb logcat` with adbd tracing on
// doesn't result in exponential logging.
