Merge "libbinder: avoid attached objects for stability" am: 1ed44fd5bb
Change-Id: Id9de508f423510a1c9682e252ac097217aa54203
diff --git a/libs/binder/Binder.cpp b/libs/binder/Binder.cpp
index 2f6e9c3..e0fb543 100644
--- a/libs/binder/Binder.cpp
+++ b/libs/binder/Binder.cpp
@@ -141,7 +141,7 @@
// ---------------------------------------------------------------------------
-BBinder::BBinder() : mExtras(nullptr)
+BBinder::BBinder() : mExtras(nullptr), mStability(0)
{
}
diff --git a/libs/binder/BpBinder.cpp b/libs/binder/BpBinder.cpp
index f16c39c..d2b9b8f 100644
--- a/libs/binder/BpBinder.cpp
+++ b/libs/binder/BpBinder.cpp
@@ -138,6 +138,7 @@
BpBinder::BpBinder(int32_t handle, int32_t trackedUid)
: mHandle(handle)
+ , mStability(0)
, mAlive(1)
, mObitsSent(0)
, mObituaries(nullptr)
diff --git a/libs/binder/Stability.cpp b/libs/binder/Stability.cpp
index 7ce5e36..e1565fa 100644
--- a/libs/binder/Stability.cpp
+++ b/libs/binder/Stability.cpp
@@ -15,6 +15,9 @@
*/
#include <binder/Stability.h>
+#include <binder/BpBinder.h>
+#include <binder/Binder.h>
+
namespace android {
namespace internal {
@@ -78,11 +81,12 @@
if (currentStability == stability) return OK;
- binder->attachObject(
- reinterpret_cast<void*>(&Stability::get),
- reinterpret_cast<void*>(stability),
- nullptr /*cleanupCookie*/,
- nullptr /*cleanup function*/);
+ BBinder* local = binder->localBinder();
+ if (local != nullptr) {
+ local->mStability = static_cast<int32_t>(stability);
+ } else {
+ binder->remoteBinder()->mStability = static_cast<int32_t>(stability);
+ }
return OK;
}
@@ -90,8 +94,12 @@
Stability::Level Stability::get(IBinder* binder) {
if (binder == nullptr) return UNDECLARED;
- return static_cast<Level>(reinterpret_cast<intptr_t>(
- binder->findObject(reinterpret_cast<void*>(&Stability::get))));
+ BBinder* local = binder->localBinder();
+ if (local != nullptr) {
+ return static_cast<Stability::Level>(local->mStability);
+ }
+
+ return static_cast<Stability::Level>(binder->remoteBinder()->mStability);
}
bool Stability::check(int32_t provided, Level required) {
diff --git a/libs/binder/include/binder/Binder.h b/libs/binder/include/binder/Binder.h
index 3be61f9..74e52db 100644
--- a/libs/binder/include/binder/Binder.h
+++ b/libs/binder/include/binder/Binder.h
@@ -24,6 +24,10 @@
// ---------------------------------------------------------------------------
namespace android {
+namespace internal {
+class Stability;
+}
+
class BBinder : public IBinder
{
public:
@@ -88,7 +92,12 @@
Extras* getOrCreateExtras();
std::atomic<Extras*> mExtras;
- void* mReserved0;
+
+ friend ::android::internal::Stability;
+ union {
+ int32_t mStability;
+ void* mReserved0;
+ };
};
// ---------------------------------------------------------------------------
diff --git a/libs/binder/include/binder/BpBinder.h b/libs/binder/include/binder/BpBinder.h
index 7dca733..8e871b8 100644
--- a/libs/binder/include/binder/BpBinder.h
+++ b/libs/binder/include/binder/BpBinder.h
@@ -27,6 +27,10 @@
// ---------------------------------------------------------------------------
namespace android {
+namespace internal {
+class Stability;
+};
+
using binder_proxy_limit_callback = void(*)(int);
class BpBinder : public IBinder
@@ -116,6 +120,9 @@
private:
const int32_t mHandle;
+ friend ::android::internal::Stability;
+ int32_t mStability;
+
struct Obituary {
wp<DeathRecipient> recipient;
void* cookie;
