SMPDataFlowAnalysis.cpp

	MapEntry.second = (STARS_ARG_POS_0 | STARS_ARG_POS_1);
	InsertResult = PointerArgPositionMap.insert(MapEntry);
	assert(InsertResult.second);

	MapEntry.first = string("fscanf");
	MapEntry.second = (STARS_ARG_POS_0 | STARS_ARG_POS_1);
	InsertResult = PointerArgPositionMap.insert(MapEntry);
	assert(InsertResult.second);

	MapEntry.first = string("printf");
	MapEntry.second = STARS_ARG_POS_0;
	InsertResult = PointerArgPositionMap.insert(MapEntry);
	assert(InsertResult.second);

	MapEntry.first = string("scanf");
	MapEntry.second = STARS_ARG_POS_0;
	InsertResult = PointerArgPositionMap.insert(MapEntry);
	assert(InsertResult.second);

	MapEntry.first = string("sprintf");
	MapEntry.second = (STARS_ARG_POS_0 | STARS_ARG_POS_1);
	InsertResult = PointerArgPositionMap.insert(MapEntry);
	assert(InsertResult.second);

	MapEntry.first = string("sscanf");
	MapEntry.second = (STARS_ARG_POS_0 | STARS_ARG_POS_1);
	InsertResult = PointerArgPositionMap.insert(MapEntry);
	assert(InsertResult.second);

	MapEntry.first = string("vfprintf");
	MapEntry.second = (STARS_ARG_POS_0 | STARS_ARG_POS_1);
	InsertResult = PointerArgPositionMap.insert(MapEntry);
	assert(InsertResult.second);

	MapEntry.first = string("vprintf");
	MapEntry.second = STARS_ARG_POS_0;
	InsertResult = PointerArgPositionMap.insert(MapEntry);
	assert(InsertResult.second);

	MapEntry.first = string("vsprintf");
	MapEntry.second = (STARS_ARG_POS_0 | STARS_ARG_POS_1);
	InsertResult = PointerArgPositionMap.insert(MapEntry);
	assert(InsertResult.second);

	MapEntry.first = string("fgetc");
	MapEntry.second = STARS_ARG_POS_0;
	InsertResult = PointerArgPositionMap.insert(MapEntry);
	assert(InsertResult.second);

	MapEntry.first = string("fgets");
	MapEntry.second = (STARS_ARG_POS_0 | STARS_ARG_POS_2);
	InsertResult = PointerArgPositionMap.insert(MapEntry);
	assert(InsertResult.second);

	MapEntry.first = string("fputc");
	MapEntry.second = STARS_ARG_POS_1;
	InsertResult = PointerArgPositionMap.insert(MapEntry);
	assert(InsertResult.second);

	MapEntry.first = string("fputs");
	MapEntry.second = (STARS_ARG_POS_0 | STARS_ARG_POS_1);
	InsertResult = PointerArgPositionMap.insert(MapEntry);
	assert(InsertResult.second);

	MapEntry.first = string("getc");
	MapEntry.second = STARS_ARG_POS_0;
	InsertResult = PointerArgPositionMap.insert(MapEntry);
	assert(InsertResult.second);

	MapEntry.first = string("gets");
	MapEntry.second = STARS_ARG_POS_0;
	InsertResult = PointerArgPositionMap.insert(MapEntry);
	assert(InsertResult.second);

	MapEntry.first = string("putc");
	MapEntry.second = STARS_ARG_POS_1;
	InsertResult = PointerArgPositionMap.insert(MapEntry);
	assert(InsertResult.second);

	MapEntry.first = string("puts");
	MapEntry.second = STARS_ARG_POS_0;
	InsertResult = PointerArgPositionMap.insert(MapEntry);
	assert(InsertResult.second);

	MapEntry.first = string("ungetc");
	MapEntry.second = STARS_ARG_POS_1;
	InsertResult = PointerArgPositionMap.insert(MapEntry);
	assert(InsertResult.second);

	MapEntry.first = string("fread");
	MapEntry.second = (STARS_ARG_POS_0 | STARS_ARG_POS_3);
	InsertResult = PointerArgPositionMap.insert(MapEntry);
	assert(InsertResult.second);

	MapEntry.first = string("fwrite");
	MapEntry.second = (STARS_ARG_POS_0 | STARS_ARG_POS_3);
	InsertResult = PointerArgPositionMap.insert(MapEntry);
	assert(InsertResult.second);

	MapEntry.first = string("fgetpos");
	MapEntry.second = (STARS_ARG_POS_0 | STARS_ARG_POS_1);
	InsertResult = PointerArgPositionMap.insert(MapEntry);
	assert(InsertResult.second);

	MapEntry.first = string("fseek");
	MapEntry.second = STARS_ARG_POS_0;
	InsertResult = PointerArgPositionMap.insert(MapEntry);
	assert(InsertResult.second);

	MapEntry.first = string("fsetpos");
	MapEntry.second = (STARS_ARG_POS_0 | STARS_ARG_POS_1);
	InsertResult = PointerArgPositionMap.insert(MapEntry);
	assert(InsertResult.second);

	MapEntry.first = string("ftell");
	MapEntry.second = STARS_ARG_POS_0;
	InsertResult = PointerArgPositionMap.insert(MapEntry);
	assert(InsertResult.second);

	MapEntry.first = string("rewind");
	MapEntry.second = STARS_ARG_POS_0;
	InsertResult = PointerArgPositionMap.insert(MapEntry);
	assert(InsertResult.second);

	MapEntry.first = string("clearerr");
	MapEntry.second = STARS_ARG_POS_0;
	InsertResult = PointerArgPositionMap.insert(MapEntry);
	assert(InsertResult.second);

	MapEntry.first = string("feof");
	MapEntry.second = STARS_ARG_POS_0;
	InsertResult = PointerArgPositionMap.insert(MapEntry);
	assert(InsertResult.second);

	MapEntry.first = string("ferror");
	MapEntry.second = STARS_ARG_POS_0;
	InsertResult = PointerArgPositionMap.insert(MapEntry);
	assert(InsertResult.second);

	MapEntry.first = string("perror");
	MapEntry.second = STARS_ARG_POS_0;
	InsertResult = PointerArgPositionMap.insert(MapEntry);
	assert(InsertResult.second);

	// <time.h>
	MapEntry.first = string("mktime");
	MapEntry.second = STARS_ARG_POS_0;
	InsertResult = PointerArgPositionMap.insert(MapEntry);
	assert(InsertResult.second);

	MapEntry.first = string("time");
	MapEntry.second = STARS_ARG_POS_0;
	InsertResult = PointerArgPositionMap.insert(MapEntry);
	assert(InsertResult.second);

	MapEntry.first = string("asctime");
	MapEntry.second = STARS_ARG_POS_0;
	InsertResult = PointerArgPositionMap.insert(MapEntry);
	assert(InsertResult.second);

	MapEntry.first = string("ctime");
	MapEntry.second = STARS_ARG_POS_0;
	InsertResult = PointerArgPositionMap.insert(MapEntry);
	assert(InsertResult.second);

	MapEntry.first = string("gmtime");
	MapEntry.second = STARS_ARG_POS_0;
	InsertResult = PointerArgPositionMap.insert(MapEntry);
	assert(InsertResult.second);

	MapEntry.first = string("localtime");
	MapEntry.second = STARS_ARG_POS_0;
	InsertResult = PointerArgPositionMap.insert(MapEntry);
	assert(InsertResult.second);

	MapEntry.first = string("strftime");
	MapEntry.second = (STARS_ARG_POS_0 | STARS_ARG_POS_2 | STARS_ARG_POS_3);
	InsertResult = PointerArgPositionMap.insert(MapEntry);
	assert(InsertResult.second);

	return;
} // end of InitPointerArgPositionMap()

// Return POINTER arg position bitset for call name from the POINTER arg map.
// If we don't find the call name, we return 0 in ArgPosBits.
void GetPointerArgPositionsForCallName(string CalleeName, unsigned int &ArgPosBits) {
	map<string, unsigned int>::iterator MapIter;

	ArgPosBits = 0; // Change if found later
	MapIter = PointerArgPositionMap.find(CalleeName);

	if (MapIter != PointerArgPositionMap.end()) { // found it
		ArgPosBits = MapIter->second;
	}
	return;
}

// Utility to count bits set in an unsigned int, e.g. ArgPosBits.
unsigned int CountBitsSet(unsigned int ArgPosBits) {
	unsigned int count; // count accumulates the total bits set in ArgPosBits
	for (count = 0; ArgPosBits; ++count) {
		ArgPosBits &= (ArgPosBits - 1); // clear the least significant bit set
	}
	// Brian Kernighan's method goes through as many iterations as there are set bits. 
	//  So if we have a 32-bit word with only the high bit set, then it will only go once through the loop.
	// Published in 1988, the C Programming Language 2nd Ed. (by Brian W. Kernighan and Dennis M. Ritchie) mentions this in exercise 2-9.
	//  On April 19, 2006 Don Knuth pointed out to me that this method "was first published by Peter Wegner in CACM 3 (1960), 322.
	//  (Also discovered independently by Derrick Lehmer and published in 1964 in a book edited by Beckenbach.)"
	return count;
}

// Initialize the FG info for the return register from any library function
//  whose name implies that we know certain return values (e.g. atoi() returns
//  a signed integer, while strtoul() returns an unsigned long).
void GetLibFuncFGInfo(string FuncName, struct FineGrainedInfo &InitFGInfo) {
	map<string, struct FineGrainedInfo>::iterator FindIter;

	FindIter = ReturnRegisterTypeMap.find(FuncName);
	if (FindIter == ReturnRegisterTypeMap.end()) { // not found
		InitFGInfo.SignMiscInfo = 0;
		InitFGInfo.SizeInfo = 0;
	}
	else { // found
		InitFGInfo = FindIter->second;
	}
	return;
} // end of GetLibFuncFGInfo()