diff options
| -rw-r--r-- | include/binder/IProcessInfoService.h | 53 | ||||
| -rw-r--r-- | include/binder/ProcessInfoService.h | 65 | ||||
| -rw-r--r-- | libs/binder/Android.mk | 2 | ||||
| -rw-r--r-- | libs/binder/IProcessInfoService.cpp | 94 | ||||
| -rw-r--r-- | libs/binder/ProcessInfoService.cpp | 70 |
5 files changed, 284 insertions, 0 deletions
diff --git a/include/binder/IProcessInfoService.h b/include/binder/IProcessInfoService.h new file mode 100644 index 0000000..dc62f45 --- /dev/null +++ b/include/binder/IProcessInfoService.h @@ -0,0 +1,53 @@ +/* + * Copyright 2015 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. + */ + +#ifndef ANDROID_I_PROCESS_INFO_SERVICE_H +#define ANDROID_I_PROCESS_INFO_SERVICE_H + +#include <binder/IInterface.h> + +namespace android { + +// ---------------------------------------------------------------------- + +class IProcessInfoService : public IInterface { +public: + DECLARE_META_INTERFACE(ProcessInfoService); + + virtual status_t getProcessStatesFromPids( size_t length, + /*in*/ int32_t* pids, + /*out*/ int32_t* states) = 0; + + enum { + GET_PROCESS_STATES_FROM_PIDS = IBinder::FIRST_CALL_TRANSACTION, + }; +}; + +// ---------------------------------------------------------------------- + +class BnProcessInfoService : public BnInterface<IProcessInfoService> { +public: + virtual status_t onTransact( uint32_t code, + const Parcel& data, + Parcel* reply, + uint32_t flags = 0); +}; + +// ---------------------------------------------------------------------- + +}; // namespace android + +#endif // ANDROID_I_PROCESS_INFO_SERVICE_H diff --git a/include/binder/ProcessInfoService.h b/include/binder/ProcessInfoService.h new file mode 100644 index 0000000..c5ead20 --- /dev/null +++ b/include/binder/ProcessInfoService.h @@ -0,0 +1,65 @@ +/* + * Copyright 2015 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. + */ + +#ifndef ANDROID_PROCESS_INFO_SERVICE_H +#define ANDROID_PROCESS_INFO_SERVICE_H + +#include <binder/IProcessInfoService.h> +#include <utils/Errors.h> +#include <utils/Singleton.h> +#include <sys/types.h> + +namespace android { + +// ---------------------------------------------------------------------- + +class ProcessInfoService : public Singleton<ProcessInfoService> { + + friend class Singleton<ProcessInfoService>; + sp<IProcessInfoService> mProcessInfoService; + Mutex mProcessInfoLock; + + ProcessInfoService(); + + status_t getProcessStatesImpl(size_t length, /*in*/ int32_t* pids, /*out*/ int32_t* states); + void updateBinderLocked(); + + static const int BINDER_ATTEMPT_LIMIT = 5; + +public: + + /** + * For each PID in the given "pids" input array, write the current process state + * for that process into the "states" output array, or + * ActivityManager.PROCESS_STATE_NONEXISTENT * to indicate that no process with the given PID + * exists. + * + * Returns NO_ERROR if this operation was successful, or a negative error code otherwise. + */ + static status_t getProcessStatesFromPids(size_t length, /*in*/ int32_t* pids, + /*out*/ int32_t* states) { + return ProcessInfoService::getInstance().getProcessStatesImpl(length, /*in*/ pids, + /*out*/ states); + } + +}; + +// ---------------------------------------------------------------------- + +}; // namespace android + +#endif // ANDROID_PROCESS_INFO_SERVICE_H + diff --git a/libs/binder/Android.mk b/libs/binder/Android.mk index 79decfe..d5860ef 100644 --- a/libs/binder/Android.mk +++ b/libs/binder/Android.mk @@ -26,6 +26,8 @@ sources := \ IMemory.cpp \ IPCThreadState.cpp \ IPermissionController.cpp \ + IProcessInfoService.cpp \ + ProcessInfoService.cpp \ IServiceManager.cpp \ MemoryDealer.cpp \ MemoryBase.cpp \ diff --git a/libs/binder/IProcessInfoService.cpp b/libs/binder/IProcessInfoService.cpp new file mode 100644 index 0000000..d86eb27 --- /dev/null +++ b/libs/binder/IProcessInfoService.cpp @@ -0,0 +1,94 @@ +/* + * Copyright 2015 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. + */ + +#include <binder/IProcessInfoService.h> +#include <binder/Parcel.h> +#include <utils/Errors.h> +#include <sys/types.h> + +namespace android { + +// ---------------------------------------------------------------------- + +class BpProcessInfoService : public BpInterface<IProcessInfoService> { +public: + BpProcessInfoService(const sp<IBinder>& impl) + : BpInterface<IProcessInfoService>(impl) {} + + virtual status_t getProcessStatesFromPids(size_t length, /*in*/ int32_t* pids, + /*out*/ int32_t* states) + { + Parcel data, reply; + data.writeInterfaceToken(IProcessInfoService::getInterfaceDescriptor()); + data.writeInt32Array(length, pids); + data.writeInt32(length); // write length of output array, used by java AIDL stubs + status_t err = remote()->transact(GET_PROCESS_STATES_FROM_PIDS, data, &reply); + if (err != NO_ERROR || ((err = reply.readExceptionCode()) != NO_ERROR)) { + return err; + } + int32_t replyLen = reply.readInt32(); + if (static_cast<size_t>(replyLen) != length) { + return NOT_ENOUGH_DATA; + } + if (replyLen > 0 && (err = reply.read(states, length * sizeof(*states))) != NO_ERROR) { + return err; + } + return reply.readInt32(); + } + +}; + +IMPLEMENT_META_INTERFACE(ProcessInfoService, "android.os.IProcessInfoService"); + +// ---------------------------------------------------------------------- + +status_t BnProcessInfoService::onTransact( uint32_t code, const Parcel& data, Parcel* reply, + uint32_t flags) { + switch(code) { + case GET_PROCESS_STATES_FROM_PIDS: { + CHECK_INTERFACE(IProcessInfoService, data, reply); + int32_t arrayLen = data.readInt32(); + if (arrayLen <= 0) { + reply->writeNoException(); + reply->writeInt32(0); + reply->writeInt32(NOT_ENOUGH_DATA); + return NO_ERROR; + } + + size_t len = static_cast<size_t>(arrayLen); + int32_t pids[len]; + status_t res = data.read(pids, len * sizeof(*pids)); + + // Ignore output array length returned in the parcel here, as the states array must + // always be the same length as the input PIDs array. + int32_t states[len]; + for (size_t i = 0; i < len; i++) states[i] = -1; + if (res == NO_ERROR) { + res = getProcessStatesFromPids(len, /*in*/ pids, /*out*/ states); + } + reply->writeNoException(); + reply->writeInt32Array(len, states); + reply->writeInt32(res); + return NO_ERROR; + } break; + default: + return BBinder::onTransact(code, data, reply, flags); + } +} + +// ---------------------------------------------------------------------- + +}; // namespace android diff --git a/libs/binder/ProcessInfoService.cpp b/libs/binder/ProcessInfoService.cpp new file mode 100644 index 0000000..fb28643 --- /dev/null +++ b/libs/binder/ProcessInfoService.cpp @@ -0,0 +1,70 @@ +/* + * Copyright 2015 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. + */ + +#include <binder/ProcessInfoService.h> +#include <binder/IServiceManager.h> + +#include <utils/Log.h> +#include <utils/String16.h> + +namespace android { + +ProcessInfoService::ProcessInfoService() { + updateBinderLocked(); +} + +status_t ProcessInfoService::getProcessStatesImpl(size_t length, /*in*/ int32_t* pids, + /*out*/ int32_t* states) { + status_t err = NO_ERROR; + sp<IProcessInfoService> pis; + mProcessInfoLock.lock(); + pis = mProcessInfoService; + mProcessInfoLock.unlock(); + + for (int i = 0; i < BINDER_ATTEMPT_LIMIT; i++) { + + if (pis != NULL) { + err = pis->getProcessStatesFromPids(length, /*in*/ pids, /*out*/ states); + if (err == NO_ERROR) return NO_ERROR; // success + if (IInterface::asBinder(pis)->isBinderAlive()) return err; + } + sleep(1); + + mProcessInfoLock.lock(); + if (pis == mProcessInfoService) { + updateBinderLocked(); + } + pis = mProcessInfoService; + mProcessInfoLock.unlock(); + } + + ALOGW("%s: Could not retrieve process states from ProcessInfoService after %d retries.", + __FUNCTION__, BINDER_ATTEMPT_LIMIT); + + return TIMED_OUT; +} + +void ProcessInfoService::updateBinderLocked() { + const sp<IServiceManager> sm(defaultServiceManager()); + if (sm != NULL) { + const String16 name("processinfo"); + mProcessInfoService = interface_cast<IProcessInfoService>(sm->checkService(name)); + } +} + +ANDROID_SINGLETON_STATIC_INSTANCE(ProcessInfoService); + +}; // namespace android |