自学教程：C++ BBL_Next函数代码示例

VOID Trace(TRACE trace, VOID *v){    for (BBL bbl = TRACE_BblHead(trace); BBL_Valid(bbl); bbl = BBL_Next(bbl))    {        BBL_InsertCall(bbl, IPOINT_ANYWHERE, (AFUNPTR)LogBBL, IARG_FAST_ANALYSIS_CALL, IARG_ADDRINT, BBL_Address(bbl), IARG_END);    }}

VOID Trace (TRACE trace, VOID *v){    for (BBL bbl = TRACE_BblHead(trace); BBL_Valid(bbl); bbl = BBL_Next(bbl))    {        for (INS ins = BBL_InsHead(bbl); INS_Valid(ins); ins = INS_Next(ins))        {            xed_iclass_enum_t iclass1 = static_cast<xed_iclass_enum_t>(INS_Opcode(ins));            if (iclass1 == XED_ICLASS_FLD1 && INS_Valid(INS_Next(ins)))            {                xed_iclass_enum_t iclass2 = static_cast<xed_iclass_enum_t>(INS_Opcode(INS_Next(ins)));                if (iclass2 == XED_ICLASS_FLD1 && INS_Valid(INS_Next(INS_Next(ins))))                {                    xed_iclass_enum_t iclass3 = static_cast<xed_iclass_enum_t>(INS_Opcode(INS_Next(INS_Next(ins))));                    if (iclass3 == XED_ICLASS_FLD1)                    {                        printf ("found fld1 sequence at %x/n", INS_Address(INS_Next(INS_Next(ins))));                                                {                            INS_InsertCall(INS_Next(INS_Next(ins)), IPOINT_AFTER, AFUNPTR(CallToFldzToTop3), IARG_END);                            printf ("Inserted call1 to FldzToTop3 after instruction at %x/n", INS_Address(INS_Next(INS_Next(ins))));                                                    }                    }                }            }        }    }}

VOID Trace (TRACE trace, VOID *v){    for (BBL bbl = TRACE_BblHead(trace); BBL_Valid(bbl); bbl = BBL_Next(bbl))    {        for (INS ins = BBL_InsHead(bbl); INS_Valid(ins); ins = INS_Next(ins))        {            xed_iclass_enum_t iclass1 = static_cast<xed_iclass_enum_t>(INS_Opcode(ins));            if (iclass1 == XED_ICLASS_FLD1 && INS_Valid(INS_Next(ins)))            {                xed_iclass_enum_t iclass2 = static_cast<xed_iclass_enum_t>(INS_Opcode(INS_Next(ins)));                if (iclass2 == XED_ICLASS_FLD1 && INS_Valid(INS_Next(INS_Next(ins))))                {                    xed_iclass_enum_t iclass3 = static_cast<xed_iclass_enum_t>(INS_Opcode(INS_Next(INS_Next(ins))));                    if (iclass3 == XED_ICLASS_FLD1)                    {                        printf ("tool: found fld1 sequence at %p/n", (void *)INS_Address(INS_Next(INS_Next(ins))));                        fflush (stdout);                        // Insert an analysis call that will cause the xmm scratch registers to be spilled                        INS_InsertCall(INS_Next(INS_Next(ins)), IPOINT_AFTER, (AFUNPTR)SetXmmScratchesFun, IARG_END);                        return;                    }                }            }        }    }}

// We have to instrument traces in order to instrument each BBL, the API doesn't have a BBL_AddInstrumentFunctionVOID trace_instrumentation(TRACE trace, VOID *v){    // We don't want to instrument the BBL contained in the Windows API    if(is_address_in_blacklisted_modules(TRACE_Address(trace)))        return;    for(BBL bbl = TRACE_BblHead(trace); BBL_Valid(bbl); bbl = BBL_Next(bbl))    {        // What's going on under the hood        // LOG("[INSTRU] BBL Address: " + hexstr(BBL_Address(bbl)) + ", " + hexstr(BBL_NumIns(bbl)) + "/n");                // Insert a call to handle_basic_block before every basic block, passing the number of instructions        BBL_InsertCall(            bbl,            IPOINT_ANYWHERE,            (AFUNPTR)handle_basic_block,            IARG_FAST_ANALYSIS_CALL, // Use a faster linkage for calls to analysis functions. Add PIN_FAST_ANALYSIS_CALL to the declaration between the return type and the function name. You must also add IARG_FAST_ANALYSIS_CALL to the InsertCall. For example:            IARG_UINT32,            BBL_NumIns(bbl),            IARG_ADDRINT,            BBL_Address(bbl),            IARG_END        );    }}

VOID Trace(TRACE trace, VOID *v){            for (BBL bbl = TRACE_BblHead(trace); BBL_Valid(bbl); bbl = BBL_Next(bbl))    {        INS tail = BBL_InsTail(bbl);                if( INS_IsCall(tail) )        {            INS_InsertCall(tail, IPOINT_BEFORE, AFUNPTR(do_call_indirect),                               IARG_BRANCH_TARGET_ADDR, IARG_BRANCH_TAKEN, IARG_END);        }        else        {            // sometimes code is not in an image            RTN rtn = TRACE_Rtn(trace);                        // also track stup jumps into share libraries            if( RTN_Valid(rtn) && !INS_IsDirectBranchOrCall(tail) && ".plt" == SEC_Name( RTN_Sec( rtn ) ))            {                INS_InsertCall(tail, IPOINT_BEFORE, AFUNPTR(do_call_indirect),                               IARG_BRANCH_TARGET_ADDR, IARG_BRANCH_TAKEN, IARG_END);            }        }            }}

VOID Trace (TRACE trace, VOID *v){    for (BBL bbl = TRACE_BblHead(trace); BBL_Valid(bbl); bbl = BBL_Next(bbl))    {        for (INS ins = BBL_InsHead(bbl); INS_Valid(ins); ins = INS_Next(ins))        {            xed_iclass_enum_t iclass1 = static_cast<xed_iclass_enum_t>(INS_Opcode(ins));            if (iclass1 == XED_ICLASS_FLD1 && INS_Valid(INS_Next(ins)))            {                xed_iclass_enum_t iclass2 = static_cast<xed_iclass_enum_t>(INS_Opcode(INS_Next(ins)));                if (iclass2 == XED_ICLASS_FLD1 && INS_Valid(INS_Next(INS_Next(ins))))                {                    xed_iclass_enum_t iclass3 = static_cast<xed_iclass_enum_t>(INS_Opcode(INS_Next(INS_Next(ins))));                    if (iclass3 == XED_ICLASS_FLD1)                    {                        printf ("found fld1 sequence at %lx/n", (unsigned long)(INS_Address(INS_Next(INS_Next(ins)))));                        if (testNum == 0)                        {                            INS_InsertCall(INS_Next(INS_Next(ins)), IPOINT_AFTER, AFUNPTR(CallToUnMaskZeroDivideInMxcsr), IARG_END);                            printf ("Inserted call1 to UnMaskZeroDivideInMxcsr after instruction at %lx/n",                                    (unsigned long)(INS_Address(INS_Next(INS_Next(ins)))));                            testNum++;                        }                        return;                    }                }            }        }    }}

VOID PolymorphicCodeHandlerModule::inspectTrace(TRACE trace){	// set the range of address in which the current trace resides	this->trace_head = TRACE_Address(trace);	this->trace_tail = trace_head + TRACE_Size(trace);	for (BBL bbl = TRACE_BblHead(trace); BBL_Valid(bbl); bbl = BBL_Next(bbl))    {        for (INS ins = BBL_InsHead(bbl); INS_Valid(ins); ins = INS_Next(ins))        {				// for ech instruction we have to check if it has been overwritten by a previous instruction of the current trace (polimiorfic code detection)			INS_InsertCall(ins, IPOINT_BEFORE, AFUNPTR(checkIfWrittenAddress), 				IARG_INST_PTR, 				IARG_CONTEXT, 				IARG_UINT32, INS_Size(ins), 				IARG_PTR, this,				IARG_END);							for (UINT32 op = 0; op<INS_MemoryOperandCount(ins); op++) {				if(INS_MemoryOperandIsWritten(ins,op)){						// for each write operation we have to check if the traget address is inside the current trace (attempt to write polimorfic code)					INS_InsertCall(ins, IPOINT_BEFORE, AFUNPTR(polimorficCodeHandler),						IARG_INST_PTR,						IARG_MEMORYOP_EA, op,						IARG_PTR, this,						IARG_END);						}				}					        }    }}

VOID Trace(TRACE trace, VOID *v){    for (BBL bbl = TRACE_BblHead(trace); BBL_Valid(bbl); bbl = BBL_Next(bbl))    {        INS_InsertCall(BBL_InsHead(bbl), IPOINT_BEFORE, (AFUNPTR)docount, IARG_UINT32, BBL_NumIns(bbl), IARG_END);    }}

VOID Trace(TRACE trace, VOID *v){    BOOL rewrite = false;        for (BBL bbl = TRACE_BblHead(trace); BBL_Valid(bbl); bbl = BBL_Next(bbl))    {        for (INS ins = BBL_InsHead(bbl); INS_Valid(ins); ins = INS_Next(ins))        {            // If we see an instruction that needs rewriting, then rewrite all            if (SwizzleRefs.find(INS_Address(ins)) != SwizzleRefs.end())                rewrite = true;                    if (rewrite)            {                // If we suspect this instruction needs to be swizzled, generate safe, but slow code                RewriteIns(ins);            }            else            {                // Generate code to check if swizzling is needed, but not do it                CheckIns(ins, TRACE_Address(trace));            }        }    }}

// Pin calls this function every time a new basic block is encountered// It inserts a call to docountVOID Trace(TRACE trace, VOID *v){    // Visit every basic block in the trace    for (BBL bbl = TRACE_BblHead(trace); BBL_Valid(bbl); bbl = BBL_Next(bbl))    {        for (INS ins = BBL_InsHead(bbl); INS_Valid(ins); ins = INS_Next(ins))        {            if (INS_IsMemoryRead(ins))            {                INS_InsertIfCall(ins, IPOINT_BEFORE, (AFUNPTR)ReadAlways, IARG_MEMORYREAD_EA, IARG_END);                INS_InsertThenCall(ins, IPOINT_BEFORE, (AFUNPTR)ReadRare, IARG_MEMORYREAD_EA, IARG_END);            }        }                    // Always()->Rare() are partially inlined        BBL_InsertIfCall(bbl,   IPOINT_BEFORE, (AFUNPTR)Always, IARG_END);        BBL_InsertThenCall(bbl, IPOINT_BEFORE, (AFUNPTR)Rare, IARG_END);        // Always()->Rare() are partially inlined        BBL_InsertIfCall(bbl,   IPOINT_BEFORE, (AFUNPTR)AlwaysNoinline, IARG_END);        BBL_InsertThenCall(bbl, IPOINT_BEFORE, (AFUNPTR)RareNoinline, IARG_END);        // Noinline() is not inlined        BBL_InsertCall(bbl, IPOINT_BEFORE, (AFUNPTR)Noinline, IARG_END);    }}

VOID Trace(TRACE trace, VOID *){    if (!EnableInstrumentation)        return;    for (BBL bbl = TRACE_BblHead(trace);  BBL_Valid(bbl);  bbl = BBL_Next(bbl))        BBL_InsertCall(bbl, IPOINT_BEFORE, AFUNPTR(CheckPC), IARG_INST_PTR, IARG_END);}

// Pin calls this function every time a new instruction is encounteredvoid Trace(TRACE trace , void *v){	for(BBL bbl= TRACE_BblHead(trace); BBL_Valid(bbl); bbl = BBL_Next(bbl)){		for( INS ins = BBL_InsHead(bbl); INS_Valid(ins) ; ins =INS_Next(ins)){			oepf.IsCurrentInOEP(ins);		}	}}

static VOID Trace(TRACE trace, VOID *v){    RTN rtn = TRACE_Rtn(trace);        ADDRINT version = TRACE_Version(trace);    // If we are not in watch_rtn, switch back to base version    if (!RTN_Valid(rtn) || RTN_Name(rtn) != watch_rtn)    {        if (version != VERSION_BASE)            BBL_SetTargetVersion(TRACE_BblHead(trace), VERSION_BASE);        return;    }    if (TRACE_Address(trace) == RTN_Address(rtn)) {        INS ins = BBL_InsHead(TRACE_BblHead(trace));        if (version == VERSION_BASE)         {            // version_reg is used to select the version, use the first            // argument of watch_rtn to set it            INS_InsertCall(ins, IPOINT_BEFORE, AFUNPTR(select_version),                           IARG_FUNCARG_ENTRYPOINT_VALUE, 0,                           IARG_RETURN_REGS, version_reg,                           IARG_END);            // IF we are in the base version, decide if we should go to the            // other versions            // Note that the version instrumentation will occur before any            // following instrumentation done on this ins            INS_InsertVersionCase(ins, version_reg, 10, VERSION_1, IARG_END);            INS_InsertVersionCase(ins, version_reg, 20, VERSION_2, IARG_END);            printf ("Instrumentation at %p/n", reinterpret_cast<void *>(INS_Address(ins)));        }    }    INS ins = BBL_InsHead(TRACE_BblHead(trace));    for (BBL bbl = TRACE_BblHead(trace); BBL_Valid(bbl); bbl = BBL_Next(bbl))     {        // Instrumentation depends on version        // These instrumentations occur after the preceeding version instrumentation        // (i.e. the instrumentation inserted by the above INS_InsertVersionCase calls        switch(version) {          case VERSION_BASE:            INS_InsertCall(ins, IPOINT_BEFORE, AFUNPTR(Emit),                             IARG_PTR, "version base", IARG_END);            break;          case VERSION_1:            INS_InsertCall(ins, IPOINT_BEFORE, AFUNPTR(Emit),                             IARG_PTR, "version 1", IARG_END);            break;          case VERSION_2:            INS_InsertCall(ins, IPOINT_BEFORE, AFUNPTR(Emit),                             IARG_PTR, "version 2", IARG_END);            break;          default:            assert(0);            break;        }    }}

VOID Trace(TRACE trace, VOID *v){    for (BBL bbl = TRACE_BblTail(trace); BBL_Valid(bbl); bbl = BBL_Next(bbl)) {        if (BBL_HasFallThrough(bbl)) {            INS ins = BBL_InsTail(bbl);            TEST(INS_HasFallThrough(ins), "BBL_HasFallThrough or INS_HasFallThrough failed");        }    }}

 static void instrument_trace(TRACE trace, VOID *v) {     sse_aligner_t* pthis = static_cast<sse_aligner_t*>(v);     bool is_read = false;     for (BBL bbl = TRACE_BblHead(trace); BBL_Valid(bbl); bbl = BBL_Next(bbl))         for (INS ins = BBL_InsHead(bbl); INS_Valid(ins); ins = INS_Next(ins))             if (check_for_sse_memop(ins, is_read, pthis))                 rewrite_instruction(ins, is_read, pthis); }

/*! * Insert call to the CountBbl() analysis routine before every basic block  * of the trace. * This function is called every time a new trace is encountered. * @param[in]   trace    trace to be instrumented * @param[in]   v        value specified by the tool in the TRACE_AddInstrumentFunction *                       function call */VOID Trace(TRACE trace, VOID *v){    // Visit every basic block in the trace    for (BBL bbl = TRACE_BblHead(trace); BBL_Valid(bbl); bbl = BBL_Next(bbl))    {        // Insert a call to CountBbl() before every basic bloc, passing the number of instructions        BBL_InsertCall(bbl, IPOINT_BEFORE, (AFUNPTR)CountBbl, IARG_UINT32, BBL_NumIns(bbl), IARG_END);    }}

VOID TraceInserted(TRACE trace, VOID *){    for (BBL bbl = TRACE_BblHead(trace); BBL_Valid(bbl); bbl = BBL_Next(bbl))    {        for (INS ins = BBL_InsHead(bbl); INS_Valid(ins); ins = INS_Next(ins))        {            cacheInstructions++;        }    }}

void Trace(TRACE trace, void *v) {    // for each bbl in the application trace...    for (BBL bbl = TRACE_BblHead(trace); BBL_Valid(bbl); bbl = BBL_Next(bbl))     {        // args:    bbl=bbl, IPOINT_BEFORE=insert before bbl, checkBBL=ptr to function to insert,         //          IARG_PTR=function argument type, BBL_Address(bbl)=function argument, IARG_END=end of arguement marker        BBL_InsertCall(bbl, IPOINT_BEFORE, (AFUNPTR)checkBBL, IARG_PTR, BBL_Address(bbl), IARG_END);    }} 

VOID Trace(TRACE trace, VOID *v){    for (BBL bbl = TRACE_BblHead(trace); BBL_Valid(bbl); bbl = BBL_Next(bbl))	BBL_InsertCall(bbl, IPOINT_ANYWHERE, AFUNPTR(Count),		IARG_FAST_ANALYSIS_CALL,		IARG_THREAD_ID,		IARG_UINT32, BBL_NumIns(bbl),		IARG_END);}

VOID Trace(TRACE trace, VOID *v){    for (BBL bbl = TRACE_BblHead(trace); BBL_Valid(bbl); bbl = BBL_Next(bbl))    {        for (INS ins = BBL_InsHead(bbl); INS_Valid(ins); ins = INS_Next(ins))        {            RewriteIns(ins);        }    }}

// Pin calls this function every time a new basic block is encountered// It inserts a call to docountVOID Trace(TRACE trace, VOID *v){    // Visit every basic block  in the trace    for (BBL bbl = TRACE_BblHead(trace); BBL_Valid(bbl); bbl = BBL_Next(bbl))    {        // Insert a call to docount for every bbl, passing the number of instructions.        // IPOINT_ANYWHERE allows Pin to schedule the call anywhere in the bbl to obtain best performance.        // Use a fast linkage for the call.        BBL_InsertCall(bbl, IPOINT_ANYWHERE, AFUNPTR(docount), IARG_FAST_ANALYSIS_CALL, IARG_UINT32, BBL_NumIns(bbl), IARG_END);    }}

// Pin calls this function every time a new basic block is encountered.// It inserts a call to docount.VOID Trace(TRACE trace, VOID *v){    // Visit every basic block  in the trace    for (BBL bbl = TRACE_BblHead(trace); BBL_Valid(bbl); bbl = BBL_Next(bbl))    {        // Insert a call to docount for every bbl, passing the number of instructions.                BBL_InsertCall(bbl, IPOINT_ANYWHERE, (AFUNPTR)docount, IARG_FAST_ANALYSIS_CALL,                       IARG_UINT32, BBL_NumIns(bbl), IARG_THREAD_ID, IARG_END);    }}

VOID DumpTrace(CHAR * message, TRACE trace){    fprintf(stderr,"/n%s:/n",message);        for (BBL bbl = TRACE_BblHead(trace); BBL_Valid(bbl); bbl = BBL_Next(bbl))    {        for (INS ins = BBL_InsHead(bbl); INS_Valid(ins); ins = INS_Next(ins))        {            fprintf(stderr,"%p %s/n",(void*)INS_Address(ins),INS_Disassemble(ins).c_str());        }    }}

VOID Trace(TRACE trace, VOID *v){    static BOOL programStart = TRUE;    if (programStart)    {        programStart = FALSE;        next_pc = (void*)INS_Address(BBL_InsHead(TRACE_BblHead(trace)));    }    for (BBL bbl = TRACE_BblHead(trace); BBL_Valid(bbl); bbl = BBL_Next(bbl))    {        // check BBL entry PC        INS_InsertCall(            BBL_InsHead(bbl), IPOINT_BEFORE, (AFUNPTR)CheckPc,            IARG_INST_PTR,            IARG_END);        INS tail = BBL_InsTail(bbl);                if (INS_IsBranchOrCall(tail))        {            // record taken branch targets            INS_InsertCall(                tail, IPOINT_BEFORE, AFUNPTR(RecordPc),                IARG_INST_PTR,                IARG_BRANCH_TARGET_ADDR,                IARG_BRANCH_TAKEN,                IARG_END);        }        if (INS_HasFallThrough(tail))        {            // record fall-through            INS_InsertCall(                tail, IPOINT_AFTER, (AFUNPTR)RecordPc,                IARG_INST_PTR,                IARG_FALLTHROUGH_ADDR,                IARG_BOOL,                TRUE,                IARG_END);        }#if defined(TARGET_IA32) || defined(TARGET_IA32E)        if (INS_IsSysenter(tail) ||            INS_HasRealRep(tail))        { // sysenter on x86 has some funny control flow that we can't correctly verify for now            // Genuinely REP prefixed instructions are also odd, they appear to stutter.            INS_InsertCall(tail, IPOINT_BEFORE, (AFUNPTR)Skip, IARG_END);        }#endif    }}

/** trace inspection (instrumentation function)** traverse the basic blocks (BBLs) on the trace and* inspect every instruction for instrumenting it* accordingly** @trace:      instructions trace; given by PIN* @v:		callback value*/static voidtrace_inspect(TRACE trace, VOID *v){	/* iterators */	BBL bbl;	INS ins;	xed_iclass_enum_t ins_indx;	/* versioning support */	ADDRINT version, version_mask = (ADDRINT)v;	if (version_mask) {		/* 		* ignore code cache versions that we		* are not supposed to instrument		*/		version = TRACE_Version(trace);		if ((version & version_mask) == 0)			return;	}	/* traverse all the BBLs in the trace */	for (bbl = TRACE_BblHead(trace); BBL_Valid(bbl); bbl = BBL_Next(bbl)) {		/* traverse all the instructions in the BBL */		for (ins = BBL_InsHead(bbl);			INS_Valid(ins);			ins = INS_Next(ins)) {				/*				* use XED to decode the instruction and				* extract its opcode				*/				ins_indx = (xed_iclass_enum_t)INS_Opcode(ins);				/* 				* invoke the pre-ins instrumentation callback				*/				if (ins_desc[ins_indx].pre != NULL)					ins_desc[ins_indx].pre(ins);				/*				* analyze the instruction (default handler)				*/				if (ins_desc[ins_indx].dflact == INSDFL_ENABLE)					ins_inspect(ins);				/* 				* invoke the post-ins instrumentation callback				*/				if (ins_desc[ins_indx].post != NULL)					ins_desc[ins_indx].post(ins);		}	}}

VOIDTrace(TRACE trace, VOID *v){	for (BBL bbl = TRACE_BblHead(trace); BBL_Valid(bbl); bbl = BBL_Next(bbl)) {		BasicBlockTrace(trace, bbl);	 	for (INS ins = BBL_InsHead(bbl); INS_Valid(ins); ins = INS_Next(ins)) {			CallTrace(trace, ins);			MemoryTrace(trace, ins);		}	}}

void trace (TRACE trace, void *v){	for (BBL bbl = TRACE_BblHead(trace); BBL_Valid(bbl); bbl = BBL_Next(bbl)) {		INS tail = BBL_InsTail(bbl);		if (INS_IsRet(tail)) {			INS_InsertCall(tail, IPOINT_BEFORE, AFUNPTR(before_return),					IARG_THREAD_ID, IARG_REG_VALUE, REG_ESP, IARG_END);		} else if (INS_IsCall(tail)) {			INS_InsertCall(tail, IPOINT_BEFORE, AFUNPTR(before_call),					IARG_THREAD_ID, IARG_REG_VALUE, REG_ESP, IARG_ADDRINT, INS_NextAddress(tail), IARG_BRANCH_TARGET_ADDR, IARG_END);		}	}}

VOID Trace(TRACE trace, VOID *v){    if (rand() % 100 > 80) {        UINT32 inscount = 0;        for (BBL bbl = TRACE_BblHead(trace); BBL_Valid(bbl); bbl = BBL_Next(bbl)) {            for (INS ins = BBL_InsHead(bbl); INS_Valid(ins); ins = INS_Next(ins)) {                inscount++;            }        }        TEST(inscount == 1, "CODECACHE_ChangeMaxInsPerTrace failed");        //cout << "trace in 0x" << TRACE_CodeCacheAddress(trace) << " has " << inscount << " INS. ";    }}

// Pin calls this function every time a new instruction is encounteredvoid Trace(TRACE trace , void *v){	for(BBL bbl= TRACE_BblHead(trace); BBL_Valid(bbl); bbl = BBL_Next(bbl)){		fprintf(file, "----BEGIN BBL---/n");				for( INS ins = BBL_InsHead(bbl); INS_Valid(ins) ; ins =INS_Next(ins)){		   fprintf(file , "%s/n" , INS_Disassemble(ins).c_str());		}				fprintf(file, "----END BBL---/n");	}}

//--------------------------------------------------------------------------static VOID trace_cb(TRACE trace, VOID *v){  // Visit every basic block in the trace  for ( BBL bbl = TRACE_BblHead(trace); BBL_Valid(bbl); bbl = BBL_Next(bbl) )  {    for( INS ins = BBL_InsHead(bbl); INS_Valid(ins); ins=INS_Next(ins) )    {      ADDRINT ea = INS_Address(ins);      if ( !valid_ea(ea) )        continue;      if ( was_writen(ea) )      {        INS_InsertCall(ins, IPOINT_BEFORE, (AFUNPTR)check_unpacked_cb,            IARG_INST_PTR,            IARG_CONST_CONTEXT,            IARG_THREAD_ID,            IARG_END);      }      // Instruments memory accesses using a predicated call, i.e.      // the instrumentation is called iff the instruction will actually be executed.      //      // The IA-64 architecture has explicitly predicated instructions.       // On the IA-32 and Intel(R) 64 architectures conditional moves and REP       // prefixed instructions appear as predicated instructions in Pin.      UINT32 mem_operands = INS_MemoryOperandCount(ins);      // Iterate over each memory operand of the instruction.      for ( UINT32 mem_op = 0; mem_op < mem_operands; mem_op++ )      {        // Note that in some architectures a single memory operand can be         // both read and written (for instance incl (%eax) on IA-32)        // In that case we instrument it once for read and once for write.        if ( INS_MemoryOperandIsWritten(ins, mem_op) )        {          INS_InsertIfPredicatedCall(ins, IPOINT_BEFORE, (AFUNPTR)valid_ea,            IARG_MEMORYOP_EA,            mem_op,             IARG_END);          INS_InsertThenPredicatedCall(              ins, IPOINT_BEFORE, (AFUNPTR)record_mem_write_cb,              IARG_INST_PTR,              IARG_MEMORYOP_EA, mem_op,              IARG_END);        }      }    }  }}