RRO: Synchronize access to overlays.list

am: 0fbb608110

Change-Id: I44a716df3954b6d2d58d7c9784f8b55cf041b10b

1 files changed, 13 insertions, 0 deletions

diff --git a/libs/androidfw/AssetManager.cpp b/libs/androidfw/AssetManager.cpp
index 043989874bc8..4c1c1b935980 100644
--- a/libs/androidfw/AssetManager.cpp
+++ b/libs/androidfw/AssetManager.cpp
@@ -35,6 +35,9 @@
 #include <utils/threads.h>
 #include <utils/Timers.h>
 #include <utils/Trace.h>
+#ifndef _WIN32
+#include <sys/file.h>
+#endif
 
 #include <assert.h>
 #include <dirent.h>
@@ -768,6 +771,12 @@ void AssetManager::addSystemOverlays(const char* pathOverlaysList,
         return;
     }
 
+#ifndef _WIN32
+    if (TEMP_FAILURE_RETRY(flock(fileno(fin), LOCK_SH)) != 0) {
+        fclose(fin);
+        return;
+    }
+#endif
     char buf[1024];
     while (fgets(buf, sizeof(buf), fin)) {
         // format of each line:
@@ -798,6 +807,10 @@ void AssetManager::addSystemOverlays(const char* pathOverlaysList,
             const_cast<AssetManager*>(this)->mZipSet.addOverlay(targetPackagePath, oap);
         }
     }
+
+#ifndef _WIN32
+    TEMP_FAILURE_RETRY(flock(fileno(fin), LOCK_UN));
+#endif
     fclose(fin);
 }