summaryrefslogtreecommitdiff
diff options
context:
space:
mode:
Diffstat
-rw-r--r--libs/binder/ndk/Android.bp2
-rw-r--r--libs/binder/rust/src/binder.rs57
-rw-r--r--libs/binder/rust/src/lib.rs4
-rw-r--r--libs/binder/rust/tests/integration.rs108
4 files changed, 167 insertions, 4 deletions
diff --git a/libs/binder/ndk/Android.bp b/libs/binder/ndk/Android.bp
index ee46fcb884..42895740ea 100644
--- a/libs/binder/ndk/Android.bp
+++ b/libs/binder/ndk/Android.bp
@@ -38,7 +38,7 @@ cc_defaults {
host: {
cflags: [
"-D__INTRODUCED_IN(n)=",
- "-D__assert(a,b,c)=",
+ "-D__assert(a,b,c)=do { syslog(LOG_ERR, a \": \" c); abort(); } while(false)",
// We want all the APIs to be available on the host.
"-D__ANDROID_API__=10000",
],
diff --git a/libs/binder/rust/src/binder.rs b/libs/binder/rust/src/binder.rs
index 3d2eddf611..4d6b294000 100644
--- a/libs/binder/rust/src/binder.rs
+++ b/libs/binder/rust/src/binder.rs
@@ -66,6 +66,35 @@ pub trait Interface: Send + Sync {
}
}
+/// Implemented by sync interfaces to specify what the associated async interface is.
+/// Generic to handle the fact that async interfaces are generic over a thread pool.
+///
+/// The binder in any object implementing this trait should be compatible with the
+/// `Target` associated type, and using `FromIBinder` to convert it to the target
+/// should not fail.
+pub trait ToAsyncInterface<P>
+where
+ Self: Interface,
+ Self::Target: FromIBinder,
+{
+ /// The async interface associated with this sync interface.
+ type Target: ?Sized;
+}
+
+/// Implemented by async interfaces to specify what the associated sync interface is.
+///
+/// The binder in any object implementing this trait should be compatible with the
+/// `Target` associated type, and using `FromIBinder` to convert it to the target
+/// should not fail.
+pub trait ToSyncInterface
+where
+ Self: Interface,
+ Self::Target: FromIBinder,
+{
+ /// The sync interface associated with this async interface.
+ type Target: ?Sized;
+}
+
/// Interface stability promise
///
/// An interface can promise to be a stable vendor interface ([`Vintf`]), or
@@ -337,6 +366,26 @@ impl<I: FromIBinder + ?Sized> Strong<I> {
pub fn downgrade(this: &Strong<I>) -> Weak<I> {
Weak::new(this)
}
+
+ /// Convert this synchronous binder handle into an asynchronous one.
+ pub fn into_async<P>(self) -> Strong<<I as ToAsyncInterface<P>>::Target>
+ where
+ I: ToAsyncInterface<P>,
+ {
+ // By implementing the ToAsyncInterface trait, it is guaranteed that the binder
+ // object is also valid for the target type.
+ FromIBinder::try_from(self.0.as_binder()).unwrap()
+ }
+
+ /// Convert this asynchronous binder handle into a synchronous one.
+ pub fn into_sync(self) -> Strong<<I as ToSyncInterface>::Target>
+ where
+ I: ToSyncInterface,
+ {
+ // By implementing the ToSyncInterface trait, it is guaranteed that the binder
+ // object is also valid for the target type.
+ FromIBinder::try_from(self.0.as_binder()).unwrap()
+ }
}
impl<I: FromIBinder + ?Sized> Clone for Strong<I> {
@@ -1017,6 +1066,14 @@ macro_rules! declare_binder_interface {
.expect(concat!("Error cloning interface ", stringify!($async_interface)))
}
}
+
+ impl<P: $crate::BinderAsyncPool> $crate::ToAsyncInterface<P> for dyn $interface {
+ type Target = dyn $async_interface<P>;
+ }
+
+ impl<P: $crate::BinderAsyncPool> $crate::ToSyncInterface for dyn $async_interface<P> {
+ type Target = dyn $interface;
+ }
)?
};
}
diff --git a/libs/binder/rust/src/lib.rs b/libs/binder/rust/src/lib.rs
index b94dfa137e..7c04a7207b 100644
--- a/libs/binder/rust/src/lib.rs
+++ b/libs/binder/rust/src/lib.rs
@@ -109,8 +109,8 @@ pub mod parcel;
pub use crate::binder::{
BinderFeatures, FromIBinder, IBinder, IBinderInternal, Interface, InterfaceClass, Remotable,
- Stability, Strong, TransactionCode, TransactionFlags, Weak, FIRST_CALL_TRANSACTION,
- FLAG_CLEAR_BUF, FLAG_ONEWAY, FLAG_PRIVATE_LOCAL, LAST_CALL_TRANSACTION,
+ Stability, Strong, ToAsyncInterface, ToSyncInterface, TransactionCode, TransactionFlags, Weak,
+ FIRST_CALL_TRANSACTION, FLAG_CLEAR_BUF, FLAG_ONEWAY, FLAG_PRIVATE_LOCAL, LAST_CALL_TRANSACTION,
};
pub use crate::binder_async::{BoxFuture, BinderAsyncPool};
pub use error::{status_t, ExceptionCode, Result, Status, StatusCode};
diff --git a/libs/binder/rust/tests/integration.rs b/libs/binder/rust/tests/integration.rs
index 40359b4749..80dc47682c 100644
--- a/libs/binder/rust/tests/integration.rs
+++ b/libs/binder/rust/tests/integration.rs
@@ -100,6 +100,7 @@ enum TestTransactionCode {
Test = FIRST_CALL_TRANSACTION,
GetDumpArgs,
GetSelinuxContext,
+ GetIsHandlingTransaction,
}
impl TryFrom<u32> for TestTransactionCode {
@@ -112,6 +113,7 @@ impl TryFrom<u32> for TestTransactionCode {
_ if c == TestTransactionCode::GetSelinuxContext as u32 => {
Ok(TestTransactionCode::GetSelinuxContext)
}
+ _ if c == TestTransactionCode::GetIsHandlingTransaction as u32 => Ok(TestTransactionCode::GetIsHandlingTransaction),
_ => Err(StatusCode::UNKNOWN_TRANSACTION),
}
}
@@ -140,6 +142,10 @@ impl ITest for TestService {
ThreadState::with_calling_sid(|sid| sid.map(|s| s.to_string_lossy().into_owned()));
sid.ok_or(StatusCode::UNEXPECTED_NULL)
}
+
+ fn get_is_handling_transaction(&self) -> binder::Result<bool> {
+ Ok(binder::is_handling_transaction())
+ }
}
/// Trivial testing binder interface
@@ -152,6 +158,9 @@ pub trait ITest: Interface {
/// Returns the caller's SELinux context
fn get_selinux_context(&self) -> binder::Result<String>;
+
+ /// Returns the value of calling `is_handling_transaction`.
+ fn get_is_handling_transaction(&self) -> binder::Result<bool>;
}
/// Async trivial testing binder interface
@@ -164,6 +173,9 @@ pub trait IATest<P>: Interface {
/// Returns the caller's SELinux context
fn get_selinux_context(&self) -> binder::BoxFuture<'static, binder::Result<String>>;
+
+ /// Returns the value of calling `is_handling_transaction`.
+ fn get_is_handling_transaction(&self) -> binder::BoxFuture<'static, binder::Result<bool>>;
}
declare_binder_interface! {
@@ -186,6 +198,7 @@ fn on_transact(
TestTransactionCode::Test => reply.write(&service.test()?),
TestTransactionCode::GetDumpArgs => reply.write(&service.get_dump_args()?),
TestTransactionCode::GetSelinuxContext => reply.write(&service.get_selinux_context()?),
+ TestTransactionCode::GetIsHandlingTransaction => reply.write(&service.get_is_handling_transaction()?),
}
}
@@ -212,6 +225,15 @@ impl ITest for BpTest {
)?;
reply.read()
}
+
+ fn get_is_handling_transaction(&self) -> binder::Result<bool> {
+ let reply = self.binder.transact(
+ TestTransactionCode::GetIsHandlingTransaction as TransactionCode,
+ 0,
+ |_| Ok(()),
+ )?;
+ reply.read()
+ }
}
impl<P: binder::BinderAsyncPool> IATest<P> for BpTest {
@@ -238,6 +260,14 @@ impl<P: binder::BinderAsyncPool> IATest<P> for BpTest {
|reply| async move { reply?.read() }
)
}
+
+ fn get_is_handling_transaction(&self) -> binder::BoxFuture<'static, binder::Result<bool>> {
+ let binder = self.binder.clone();
+ P::spawn(
+ move || binder.transact(TestTransactionCode::GetIsHandlingTransaction as TransactionCode, 0, |_| Ok(())),
+ |reply| async move { reply?.read() }
+ )
+ }
}
impl ITest for Binder<BnTest> {
@@ -252,6 +282,10 @@ impl ITest for Binder<BnTest> {
fn get_selinux_context(&self) -> binder::Result<String> {
self.0.get_selinux_context()
}
+
+ fn get_is_handling_transaction(&self) -> binder::Result<bool> {
+ self.0.get_is_handling_transaction()
+ }
}
impl<P: binder::BinderAsyncPool> IATest<P> for Binder<BnTest> {
@@ -269,6 +303,11 @@ impl<P: binder::BinderAsyncPool> IATest<P> for Binder<BnTest> {
let res = self.0.get_selinux_context();
Box::pin(async move { res })
}
+
+ fn get_is_handling_transaction(&self) -> binder::BoxFuture<'static, binder::Result<bool>> {
+ let res = self.0.get_is_handling_transaction();
+ Box::pin(async move { res })
+ }
}
/// Trivial testing binder interface
@@ -500,7 +539,7 @@ mod tests {
#[tokio::test]
async fn get_selinux_context_async() {
- let service_name = "get_selinux_context";
+ let service_name = "get_selinux_context_async";
let _process = ScopedServiceProcess::new(service_name);
let test_client: Strong<dyn IATest<Tokio>> =
binder_tokio::get_interface(service_name).await.expect("Did not get manager binder service");
@@ -510,6 +549,32 @@ mod tests {
);
}
+ #[tokio::test]
+ async fn get_selinux_context_sync_to_async() {
+ let service_name = "get_selinux_context";
+ let _process = ScopedServiceProcess::new(service_name);
+ let test_client: Strong<dyn ITest> =
+ binder::get_interface(service_name).expect("Did not get manager binder service");
+ let test_client = test_client.into_async::<Tokio>();
+ assert_eq!(
+ test_client.get_selinux_context().await.unwrap(),
+ get_expected_selinux_context()
+ );
+ }
+
+ #[tokio::test]
+ async fn get_selinux_context_async_to_sync() {
+ let service_name = "get_selinux_context";
+ let _process = ScopedServiceProcess::new(service_name);
+ let test_client: Strong<dyn IATest<Tokio>> =
+ binder_tokio::get_interface(service_name).await.expect("Did not get manager binder service");
+ let test_client = test_client.into_sync();
+ assert_eq!(
+ test_client.get_selinux_context().unwrap(),
+ get_expected_selinux_context()
+ );
+ }
+
struct Bools {
binder_died: Arc<AtomicBool>,
binder_dealloc: Arc<AtomicBool>,
@@ -867,4 +932,45 @@ mod tests {
Err(err) => assert_eq!(err, binder::StatusCode::BAD_VALUE),
}
}
+
+ #[test]
+ fn get_is_handling_transaction() {
+ let service_name = "get_is_handling_transaction";
+ let _process = ScopedServiceProcess::new(service_name);
+ let test_client: Strong<dyn ITest> =
+ binder::get_interface(service_name).expect("Did not get manager binder service");
+ // Should be true externally.
+ assert!(test_client.get_is_handling_transaction().unwrap());
+
+ // Should be false locally.
+ assert!(!binder::is_handling_transaction());
+
+ // Should also be false in spawned thread.
+ std::thread::spawn(|| {
+ assert!(!binder::is_handling_transaction());
+ }).join().unwrap();
+ }
+
+ #[tokio::test]
+ async fn get_is_handling_transaction_async() {
+ let service_name = "get_is_handling_transaction_async";
+ let _process = ScopedServiceProcess::new(service_name);
+ let test_client: Strong<dyn IATest<Tokio>> =
+ binder_tokio::get_interface(service_name).await.expect("Did not get manager binder service");
+ // Should be true externally.
+ assert!(test_client.get_is_handling_transaction().await.unwrap());
+
+ // Should be false locally.
+ assert!(!binder::is_handling_transaction());
+
+ // Should also be false in spawned task.
+ tokio::spawn(async {
+ assert!(!binder::is_handling_transaction());
+ }).await.unwrap();
+
+ // And in spawn_blocking task.
+ tokio::task::spawn_blocking(|| {
+ assert!(!binder::is_handling_transaction());
+ }).await.unwrap();
+ }
}
generated by cgit v1.2.3-59-g8ed1b (git 2.39.0) at 2025-10-21 14:14:04 +0000