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Commit b09fc4ab authored by Marco Ballesio's avatar Marco Ballesio
Browse files

libbinder: adopt BINDER_GET_FROZEN_INFO 

Introduce a new function to use BINDER_GET_FROZEN_INFO and related
tests.

Bug: 143717177
Test: atest testBinderLib

Change-Id: I8a6c550fadef90b73a36a7931c2a8b2d00a64a04
parent e51e48b0

libs/binder/IPCThreadState.cpp

+16 −0
Original line number Diff line number Diff line
@@ -1320,6 +1320,22 @@ void IPCThreadState::threadDestructor(void *st) 
        }

}



status_t IPCThreadState::getProcessFreezeInfo(pid_t pid, bool *sync_received, bool *async_received)

{

    int ret = 0;

    binder_frozen_status_info info;

    info.pid = pid;



#if defined(__ANDROID__)

    if (ioctl(self()->mProcess->mDriverFD, BINDER_GET_FROZEN_INFO, &info) < 0)

        ret = -errno;

#endif

    *sync_received = info.sync_recv;

    *async_received = info.async_recv;



    return ret;

}



status_t IPCThreadState::freeze(pid_t pid, bool enable, uint32_t timeout_ms) {

    struct binder_freeze_info info;

    int ret = 0;

libs/binder/include/binder/IPCThreadState.h

+3 −0
Original line number Diff line number Diff line
@@ -49,6 +49,9 @@ public: 
    // returns: 0 in case of success, a value < 0 in case of error

    static  status_t            freeze(pid_t pid, bool enabled, uint32_t timeout_ms);



    // Provide information about the state of a frozen process

    static  status_t            getProcessFreezeInfo(pid_t pid, bool *sync_received,

                                                    bool *async_received);

            sp<ProcessState>    process();

            

            status_t            clearLastError();

libs/binder/include/private/binder/binder_module.h

+23 −0
Original line number Diff line number Diff line
@@ -66,6 +66,29 @@ struct binder_freeze_info { 
};

#endif //BINDER_FREEZE



#ifndef BINDER_GET_FROZEN_INFO



#define BINDER_GET_FROZEN_INFO          _IOWR('b', 15, struct binder_frozen_status_info)



struct binder_frozen_status_info {

    //

    // Group-leader PID of process to be queried

    //

    __u32            pid;

    //

    // Indicates whether the process has received any sync calls since last

    // freeze (cleared at freeze/unfreeze)

    //

    __u32            sync_recv;

    //

    // Indicates whether the process has received any async calls since last

    // freeze (cleared at freeze/unfreeze)

    //

    __u32            async_recv;

};

#endif //BINDER_GET_FROZEN_INFO







#ifdef __cplusplus

}   // namespace android

libs/binder/tests/binderLibTest.cpp

+9 −0
Original line number Diff line number Diff line
@@ -432,6 +432,15 @@ TEST_F(BinderLibTest, Freeze) { 
    EXPECT_EQ(-EAGAIN, IPCThreadState::self()->freeze(pid, 1, 0));

    EXPECT_EQ(NO_ERROR, IPCThreadState::self()->freeze(pid, 1, 1000));

    EXPECT_EQ(FAILED_TRANSACTION, m_server->transact(BINDER_LIB_TEST_NOP_TRANSACTION, data, &reply));



    bool sync_received, async_received;



    EXPECT_EQ(NO_ERROR, IPCThreadState::self()->getProcessFreezeInfo(pid, &sync_received,

                &async_received));



    EXPECT_EQ(sync_received, 1);

    EXPECT_EQ(async_received, 0);



    EXPECT_EQ(NO_ERROR, IPCThreadState::self()->freeze(pid, 0, 0));

    EXPECT_EQ(NO_ERROR, m_server->transact(BINDER_LIB_TEST_NOP_TRANSACTION, data, &reply));

}