Start of work on passing around StrictMode policy over Binder calls.

This is (intendend to be) a no-op change.

At this stage, Binder RPCs just have an additional uint32 passed around
in the header, right before the interface name.  But nothing is actually
done with them yet.  That value should right now always be 0.

This now boots and seems to work.

Change-Id: I135b7c84f07575e6b9717fef2424d301a450df7b

2 files changed, 9 insertions, 2 deletions

diff --git a/include/binder/IPCThreadState.h b/include/binder/IPCThreadState.h
index 3ab985d..04e24d2 100644
--- a/include/binder/IPCThreadState.h
+++ b/include/binder/IPCThreadState.h
@@ -40,6 +40,9 @@ public:
 
             int                 getCallingPid();
             int                 getCallingUid();
+
+            void                setStrictModePolicy(int32_t policy);
+            int32_t             getStrictModePolicy() const;
             
             int64_t             clearCallingIdentity();
             void                restoreCallingIdentity(int64_t token);
@@ -109,8 +112,9 @@ private:
             status_t            mLastError;
             pid_t               mCallingPid;
             uid_t               mCallingUid;
+            int32_t             mStrictModePolicy;
 };
-    
+
 }; // namespace android
 
 // ---------------------------------------------------------------------------
diff --git a/include/binder/Parcel.h b/include/binder/Parcel.h
index 66c34b2..2cc4db9 100644
--- a/include/binder/Parcel.h
+++ b/include/binder/Parcel.h
@@ -56,9 +56,12 @@ public:
 
     bool                hasFileDescriptors() const;
 
+    // Writes the RPC header.
     status_t            writeInterfaceToken(const String16& interface);
+    // Parses the RPC header, returning true if the interface name
+    // in the header matches the expected interface from the caller.
     bool                enforceInterface(const String16& interface) const;
-    bool                checkInterface(IBinder*) const;    
+    bool                checkInterface(IBinder*) const;
 
     void                freeData();