Add API for retrieving oom scores from ActivityManagerService (c72a90a3) · Commits · e / os / platform_frameworks_native

include/binder/IProcessInfoService.h

+6 −0

Original line number	Diff line number	Diff line
		@@ -31,8 +31,14 @@ public:
		/in/ int32_t* pids,
		/out/ int32_t* states) = 0;

		virtual status_t getProcessStatesAndOomScoresFromPids( size_t length,
		/in/ int32_t* pids,
		/out/ int32_t* states,
		/out/ int32_t* scores) = 0;

		enum {
		GET_PROCESS_STATES_FROM_PIDS = IBinder::FIRST_CALL_TRANSACTION,
		GET_PROCESS_STATES_AND_OOM_SCORES_FROM_PIDS,
		};
		};

libs/binder/IProcessInfoService.cpp

+65 −0

Original line number	Diff line number	Diff line
		@@ -49,6 +49,39 @@ public:
		return reply.readInt32();
		}

		virtual status_t getProcessStatesAndOomScoresFromPids(size_t length,
		/in/ int32_t* pids, /out/ int32_t* states, /out/ int32_t* scores)
		{
		Parcel data, reply;
		data.writeInterfaceToken(IProcessInfoService::getInterfaceDescriptor());
		data.writeInt32Array(length, pids);
		// write length of output arrays, used by java AIDL stubs
		data.writeInt32(length);
		data.writeInt32(length);
		status_t err = remote()->transact(
		GET_PROCESS_STATES_AND_OOM_SCORES_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;
		}
		replyLen = reply.readInt32();
		if (static_cast<size_t>(replyLen) != length) {
		return NOT_ENOUGH_DATA;
		}
		if (replyLen > 0 && (err = reply.read(
		scores, length * sizeof(*scores))) != NO_ERROR) {
		return err;
		}
		return reply.readInt32();
		}
		};

		IMPLEMENT_META_INTERFACE(ProcessInfoService, "android.os.IProcessInfoService");
		@@ -84,6 +117,38 @@ status_t BnProcessInfoService::onTransact( uint32_t code, const Parcel& data, Pa
		reply->writeInt32(res);
		return NO_ERROR;
		} break;
		case GET_PROCESS_STATES_AND_OOM_SCORES_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];
		int32_t scores[len];
		for (size_t i = 0; i < len; i++) {
		states[i] = -1;
		scores[i] = -10000;
		}
		if (res == NO_ERROR) {
		res = getProcessStatesAndOomScoresFromPids(
		len, /in/ pids, /out/ states, /out/ scores);
		}
		reply->writeNoException();
		reply->writeInt32Array(len, states);
		reply->writeInt32Array(len, scores);
		reply->writeInt32(res);
		return NO_ERROR;
		} break;
		default:
		return BBinder::onTransact(code, data, reply, flags);
		}