Merge "libbinder: remove unused ProcessState mRootDir"
diff --git a/cmds/lshal/test.cpp b/cmds/lshal/test.cpp
index b6ff28d..7c1ca91 100644
--- a/cmds/lshal/test.cpp
+++ b/cmds/lshal/test.cpp
@@ -508,10 +508,10 @@
     EXPECT_THAT(output, HasSubstr("a.h.foo6@6.0::IFoo/6"));
     EXPECT_EQ("", err.str());
 
+    std::string error;
     vintf::HalManifest m;
-    EXPECT_EQ(true, vintf::gHalManifestConverter(&m, out.str()))
-        << "--init-vintf does not emit valid HAL manifest: "
-        << vintf::gHalManifestConverter.lastError();
+    EXPECT_EQ(true, vintf::gHalManifestConverter(&m, out.str(), &error))
+        << "--init-vintf does not emit valid HAL manifest: " << error;
 }
 
 // test default columns
diff --git a/libs/binder/Android.bp b/libs/binder/Android.bp
index 2715d6a..05c32b3 100644
--- a/libs/binder/Android.bp
+++ b/libs/binder/Android.bp
@@ -296,3 +296,14 @@
         "liblog",
     ],
 }
+
+// TODO(b/183654927): initially empty lib to work around some merge conflicts
+cc_library {
+    name: "libactivitymanager_aidl",
+    srcs: [],
+    shared_libs: [
+        "libbinder",
+        "libutils",
+        "liblog",
+    ],
+}
diff --git a/libs/binder/include/binder/Stability.h b/libs/binder/include/binder/Stability.h
index 1831ffc..f4bfac8 100644
--- a/libs/binder/include/binder/Stability.h
+++ b/libs/binder/include/binder/Stability.h
@@ -57,6 +57,9 @@
     // can be called to use that same interface within the local partition.
     static void forceDowngradeToLocalStability(const sp<IBinder>& binder);
 
+    // WARNING: Below APIs are only ever expected to be called by auto-generated code.
+    //     Instead of calling them, you should set the stability of a .aidl interface
+
     // WARNING: The only client of
     //      - forceDowngradeToSystemStability() and;
     //      - korceDowngradeToVendorStability()
@@ -82,9 +85,6 @@
     // can be called to use that same interface within the system partition.
     static void forceDowngradeToSystemStability(const sp<IBinder>& binder);
 
-    // WARNING: Below APIs are only ever expected to be called by auto-generated code.
-    //     Instead of calling them, you should set the stability of a .aidl interface
-
     // WARNING: This is only ever expected to be called by auto-generated code. You likely want to
     // change or modify the stability class of the interface you are using.
     // This must be called as soon as the binder in question is constructed. No thread safety
diff --git a/libs/binder/ndk/include_ndk/android/binder_ibinder.h b/libs/binder/ndk/include_ndk/android/binder_ibinder.h
index 8941e49..b9adc9a 100644
--- a/libs/binder/ndk/include_ndk/android/binder_ibinder.h
+++ b/libs/binder/ndk/include_ndk/android/binder_ibinder.h
@@ -36,6 +36,9 @@
 
 __BEGIN_DECLS
 
+/**
+ * Flags for AIBinder_transact.
+ */
 typedef uint32_t binder_flags_t;
 enum {
     /**
@@ -47,7 +50,10 @@
     FLAG_ONEWAY = 0x01,
 };
 
-// Also see IBinder.h in libbinder
+/**
+ * Codes for AIBinder_transact. This defines the range of codes available for
+ * usage. Other codes are used or reserved by the Android system.
+ */
 typedef uint32_t transaction_code_t;
 enum {
     /**
@@ -202,7 +208,8 @@
  *
  * Available since API level 29.
  *
- * \param dump function to call when an instance of this binder class is being dumped.
+ * \param clazz class which should use this dump function
+ * \param onDump function to call when an instance of this binder class is being dumped.
  */
 void AIBinder_Class_setOnDump(AIBinder_Class* clazz, AIBinder_onDump onDump) __INTRODUCED_IN(29);
 
diff --git a/libs/binder/ndk/include_ndk/android/binder_status.h b/libs/binder/ndk/include_ndk/android/binder_status.h
index b4dc08a..6f1fdfc 100644
--- a/libs/binder/ndk/include_ndk/android/binder_status.h
+++ b/libs/binder/ndk/include_ndk/android/binder_status.h
@@ -189,7 +189,7 @@
  *
  * Available since API level 29.
  *
- * \param a low-level error to associate with this status object.
+ * \param status a low-level error to associate with this status object.
  *
  * \return a newly constructed status object that the caller owns.
  */
diff --git a/libs/binder/tests/binderStabilityTest.cpp b/libs/binder/tests/binderStabilityTest.cpp
index dbd3f4e..cb309bd 100644
--- a/libs/binder/tests/binderStabilityTest.cpp
+++ b/libs/binder/tests/binderStabilityTest.cpp
@@ -132,7 +132,7 @@
     EXPECT_TRUE(Stability::requiresVintfDeclaration(BadStableBinder::vintf()));
 }
 
-TEST(BinderStability, ForceDowngradeStability) {
+TEST(BinderStability, ForceDowngradeToLocalStability) {
     sp<IBinder> someBinder = BadStableBinder::vintf();
 
     EXPECT_TRUE(Stability::requiresVintfDeclaration(someBinder));
@@ -143,7 +143,7 @@
     EXPECT_FALSE(Stability::requiresVintfDeclaration(someBinder));
 }
 
-TEST(BinderStability, NdkForceDowngradeStability) {
+TEST(BinderStability, NdkForceDowngradeToLocalStability) {
     sp<IBinder> someBinder = BadStableBinder::vintf();
 
     EXPECT_TRUE(Stability::requiresVintfDeclaration(someBinder));
@@ -154,6 +154,33 @@
     EXPECT_FALSE(Stability::requiresVintfDeclaration(someBinder));
 }
 
+TEST(BinderStability, ForceDowngradeToVendorStability) {
+    sp<IBinder> serverBinder = android::defaultServiceManager()->getService(kSystemStabilityServer);
+    auto server = interface_cast<IBinderStabilityTest>(serverBinder);
+
+    ASSERT_NE(nullptr, server.get());
+    ASSERT_NE(nullptr, IInterface::asBinder(server)->remoteBinder());
+
+    {
+        sp<BadStableBinder> binder = BadStableBinder::vintf();
+
+        EXPECT_TRUE(Stability::requiresVintfDeclaration(binder));
+        EXPECT_TRUE(server->sendAndCallBinder(binder).isOk());
+        EXPECT_TRUE(binder->gotUserTransaction);
+    }
+    {
+        sp<BadStableBinder> binder = BadStableBinder::vintf();
+
+        // This method should never be called directly. This is done only for the test.
+        Stability::forceDowngradeToVendorStability(binder);
+
+        // Binder downgraded to vendor stability, cannot be called from system context
+        EXPECT_FALSE(Stability::requiresVintfDeclaration(binder));
+        EXPECT_EQ(BAD_TYPE, server->sendAndCallBinder(binder).exceptionCode());
+        EXPECT_FALSE(binder->gotUserTransaction);
+    }
+}
+
 TEST(BinderStability, VintfStabilityServerMustBeDeclaredInManifest) {
     sp<IBinder> vintfServer = BadStableBinder::vintf();