Add callback hack to find out when to reload system properties.

Every IBinder object can accept a new transaction to tell it that
it might want to reload system properties, and in the process
anyone can register a callback to be executed when this happens.

Use this to reload the trace property.

This is very much ONLY for debugging.

Change-Id: I55c67c46f8f3fa9073bef0dfaab4577ed1d47eb4

1 files changed, 7 insertions, 0 deletions

diff --git a/Binder.cpp b/Binder.cpp
index e20d8a3..1f21f9c 100644
--- a/Binder.cpp
+++ b/Binder.cpp
@@ -17,6 +17,7 @@
 #include <binder/Binder.h>
 
 #include <utils/Atomic.h>
+#include <utils/misc.h>
 #include <binder/BpBinder.h>
 #include <binder/IInterface.h>
 #include <binder/Parcel.h>
@@ -199,6 +200,12 @@ status_t BBinder::onTransact(
             }
             return dump(fd, args);
         }
+
+        case SYSPROPS_TRANSACTION: {
+            report_sysprop_change();
+            return NO_ERROR;
+        }
+
         default:
             return UNKNOWN_TRANSACTION;
     }