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Commit 3b9ac062 authored by Kalesh Singh's avatar Kalesh Singh
Browse files

Add force downgrade to vendor stability test 

Bug: 183154648
Bug: 177664629
Test: atest binderStabilityTest
Change-Id: I8fdd4df355a0ca269fed2898e54088e8f55ccc37
parent 97589e43

libs/binder/include/binder/Stability.h

+3 −3
Original line number Diff line number Diff line
@@ -57,6 +57,9 @@ public: 
    // 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 @@ public: 
    // 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

libs/binder/tests/binderStabilityTest.cpp

+29 −2
Original line number Diff line number Diff line
@@ -132,7 +132,7 @@ TEST(BinderStability, OnlyVintfStabilityBinderNeedsVintfDeclaration) { 
    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 @@ TEST(BinderStability, ForceDowngradeStability) { 
    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 @@ TEST(BinderStability, NdkForceDowngradeStability) { 
    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();