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/*
* Copyright (C) 2019 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#pragma once
#include <binder/IBinder.h>
#include <string>
namespace android {
class BpBinder;
class ProcessState;
namespace internal {
// WARNING: These 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
class Stability final {
public:
// 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
// is provided.
// E.g. stability is according to libbinder compilation unit
static void markCompilationUnit(IBinder* binder);
// 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
// is provided.
// E.g. stability is according to libbinder_ndk or Java SDK AND the interface
// expressed here is guaranteed to be stable for multiple years (Stable AIDL)
static void markVintf(IBinder* binder);
// WARNING: for debugging only
static void debugLogStability(const std::string& tag, const sp<IBinder>& binder);
// WARNING: This is only ever expected to be called by auto-generated code or tests.
// You likely want to change or modify the stability of the interface you are using.
// This must be called as soon as the binder in question is constructed. No thread safety
// is provided.
// E.g. stability is according to libbinder_ndk or Java SDK AND the interface
// expressed here is guaranteed to be stable for multiple years (Stable AIDL)
// If this is called when __ANDROID_VNDK__ is not defined, then it is UB and will likely
// break the device during GSI or other tests.
static void markVndk(IBinder* binder);
// Returns true if the binder needs to be declared in the VINTF manifest or
// else false if the binder is local to the current partition.
static bool requiresVintfDeclaration(const sp<IBinder>& binder);
private:
// Parcel needs to read/write stability level in an unstable format.
friend ::android::Parcel;
// only expose internal APIs inside of libbinder, for checking stability
friend ::android::BpBinder;
// so that it can mark the context object (only the root object doesn't go
// through Parcel)
friend ::android::ProcessState;
static void tryMarkCompilationUnit(IBinder* binder);
enum Level : int32_t {
UNDECLARED = 0,
VENDOR = 0b000011,
SYSTEM = 0b001100,
VINTF = 0b111111,
};
#if defined(__ANDROID_VNDK__) && !defined(__ANDROID_APEX__)
static constexpr Level kLocalStability = Level::VENDOR;
#else
static constexpr Level kLocalStability = Level::SYSTEM;
#endif
// applies stability to binder if stability level is known
__attribute__((warn_unused_result))
static status_t set(IBinder* binder, int32_t stability, bool log);
static Level get(IBinder* binder);
static bool check(int32_t provided, Level required);
static bool isDeclaredStability(int32_t stability);
static std::string stabilityString(int32_t stability);
Stability();
};
} // namespace internal
} // namespace android
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