/*BEGIN_LEGAL 
Intel Open Source License 

Copyright (c) 2002-2005 Intel Corporation 
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Redistributions of source code must retain the above copyright notice,
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END_LEGAL */
//#define USE_COND_INST


typedef VOID (*ALARM_HANDLER)(VOID *v, CONTEXT * ctxt, VOID *, VOID * tid);

class PINPOINT_ADDRESS_COUNT_ALARM
{
  inline friend ostream& operator<<(ostream& o, PINPOINT_ADDRESS_COUNT_ALARM & a)
    {
        o.setf(ios::showbase);
        o << hex << "Address: " << a._address << endl;
        o << (IMG_Valid(a._img)?IMG_Name(a._img):"InvalidImage") << " LowAddress: " << hex  << (IMG_Valid(a._img)?IMG_LowAddress(a._img):1) << " LoadOffset: " << hex << (IMG_Valid(a._img)?IMG_LoadOffset(a._img):0) << endl;
        // for (UINT64 i = 0; i < a._maxThreads; i++)
        for (UINT64 i = 0; i < 1; i++)
        {
            o << dec << "  threadid: " << i << " count: " << a.Count(i) << " alarm: ";
            if (a.Alarm(i) == PINPOINT_ADDRESS_COUNT_ALARM::NEVER)
                o << "off" << endl;
            else
                o << a.Alarm(i) << endl;
        }
     
        return o;
    }
  public:
    enum { NEVER = ~0ULL };
    
    PINPOINT_ADDRESS_COUNT_ALARM(BOOL passContext=false)
        : _passContext(passContext)
    {
        memset(this, 0, sizeof(*this));
    }
    VOID setPassContext(BOOL passContext)
    {
        _passContext = passContext;
    }

    VOID Activate(UINT64 address, UINT64 watchThread)
    {
        _address = address;
        _active = true;

        _watchThread = watchThread;
        _maxThreads = 10;
        ASSERTX((INT32)_watchThread < _maxThreads);


        _counts = new UINT64[_maxThreads];
        memset(_counts, 0, sizeof(_counts[0]) * _maxThreads);
    
        _alarms = new UINT64[_maxThreads];
        for(INT32 i = 0; i < _maxThreads; i++)
        {
            _alarms[i] = NEVER;
        }

        _handlers = new ALARM_HANDLER[_maxThreads];
        memset(_handlers, 0, sizeof(_handlers[0]) * _maxThreads);

        _vs = new VOID*[_maxThreads];
        memset(_vs, 0, sizeof(_vs[0]) * _maxThreads);

        INS_AddInstrumentFunction(Instruction, this);
    }
    bool IsActive() const { return _active; };
    
    UINT64 Address() const { return _address; };

    UINT64 Count(UINT64 threadid = 0) const { return _counts[threadid]; };
    VOID SetCount(UINT64 count, UINT64 threadid = 0) { _counts[threadid] = count; };


    VOID SetAlarm(UINT64 alarm, ALARM_HANDLER handler, VOID *v = 0, UINT64 threadid = 0)
    {
        ASSERTX(_counts[threadid] < alarm);
        _alarms[threadid] = alarm;
        _handlers[threadid] = handler;
        _vs[threadid] = v;
    }
    VOID Clear(UINT64 threadid = 0) { _alarms[threadid] = NEVER; };

    UINT64 Alarm(UINT64 threadid = 0) const { return _alarms[threadid]; };
    
  private:
    BOOL _passContext;
    INT32 _maxThreads;
    ADDRINT _watchThread;
    UINT64 _address;
    UINT64* _counts;
    ALARM_HANDLER* _handlers;
    UINT64* _alarms;
    VOID **_vs;
    bool _active;
    IMG _img;


    static VOID Instruction(INS ins, VOID *v)
    {
        PINPOINT_ADDRESS_COUNT_ALARM * al = static_cast<PINPOINT_ADDRESS_COUNT_ALARM*>(v);

        if (INS_Address(ins) == al->_address)
        {
            RTN rtn = INS_Rtn(ins);
            SEC sec = SEC_Invalid();
            IMG img = IMG_Invalid();
            if(RTN_Valid(rtn)) 
                sec = RTN_Sec(rtn);
            if(SEC_Valid(sec))
                img = SEC_Img(sec);

            al->_img = img;

#ifdef USE_COND_INST
            // Use conditional instrumentation to trigger partial inlining
            INS_InsertIfCall(ins, IPOINT_BEFORE, (AFUNPTR)doIf, IARG_THREAD_ID,
                             IARG_ADDRINT, al,
                             IARG_ADDRINT, &al->_counts[al->_watchThread],
                             IARG_ADDRINT, &al->_alarms[al->_watchThread],
                             IARG_END);
            if (al->_passContext)
            {
                INS_InsertThenCall(ins, IPOINT_BEFORE, (AFUNPTR)doThen,
                                   IARG_ADDRINT, al,
                                   IARG_CONTEXT,
                                   IARG_INST_PTR,
                                   IARG_UINT32, al->_watchThread,
                                   IARG_END);
            }
            else 
            {
                INS_InsertThenCall(ins, IPOINT_BEFORE, (AFUNPTR)doThen,
                                   IARG_ADDRINT, al,
                                   IARG_ADDRINT, static_cast<ADDRINT>(0), // PASS A NULL
                                   IARG_INST_PTR,
                                   IARG_UINT32, al->_watchThread,
                                   IARG_END);
            }

#else

            if (al->_passContext) 
            {
                INS_InsertCall(ins, IPOINT_BEFORE, 
                               (AFUNPTR)docountTat,
                               IARG_THREAD_ID,
                               IARG_ADDRINT, al,
                               IARG_CONTEXT,
                               IARG_INST_PTR,
                               IARG_UINT32, al->_watchThread,
                               IARG_END);
            }
            else
            {

                INS_InsertCall(ins, IPOINT_BEFORE, 
                               (AFUNPTR)docountTat,
                               IARG_THREAD_ID,
                               IARG_ADDRINT, al,
                               IARG_ADDRINT, static_cast<ADDRINT>(0), // PASS A NULL
                               IARG_INST_PTR,
                               IARG_UINT32, al->_watchThread,
                               IARG_END);
            }
#endif            
        }
    }

#ifdef USE_COND_INST
    static INT32 doIf(INT32 threadid, PINPOINT_ADDRESS_COUNT_ALARM *a, UINT64* watchedCount, UINT64* watchedAlarm)
    {
        a->_counts[threadid]++;

        // Originally is "return a->_counts[watchThread] == a->_alarms[watchThread]"
        // Here watchedCount is set to &a->_counts[watchThread] and watchedThread to &a->_alarms[watchThread]
        // at instrumentation time.
        
        return (*watchedCount == *watchedAlarm);
        
    }
    static VOID doThen(PINPOINT_ADDRESS_COUNT_ALARM *a, CONTEXT * ctxt, VOID *ip, INT32 watchThread)
    {
        //UINT64 alarm = a->_alarms[threadid];
        a->Clear(watchThread);
        a->_handlers[watchThread](a->_vs[watchThread], ctxt, ip, (VOID *)a->_watchThread);
    }
#else    
    // docountTat == Thread at a time
    // We have an alarm per (address,thread) combination.
    // However, each alarm has _maxThreads elements in _counts.
    // This function gets called for each thread and we increment
    // _counts for that thread. However, we only trigger hanlder
    // for the watchThread for the alarm passed in.
    // All this to avoid the comparison (threadid == watchThread)
    // for easier partial inlining.
    static VOID docountTat(INT32 threadid, PINPOINT_ADDRESS_COUNT_ALARM *a, CONTEXT * ctxt, VOID *ip, INT32 watchThread)
    {
        // We have a uniq alarm per (address, thread) combination
        // hence passing threadid 0 to always access the _counts[0]
        // docountT(threadid, watchThread, a, ctxt, ip);
        a->_counts[threadid]++;
        if (a->_counts[watchThread] == a->_alarms[watchThread])
        {
            //UINT64 alarm = a->_alarms[threadid];
            a->Clear(watchThread);
            a->_handlers[watchThread](a->_vs[watchThread], ctxt, ip, (VOID *)a->_watchThread);
        }
    }
#endif
};