bool PathList::function_pointer_analysis()
{
// add by wh
// for add the global function pointer table command_table
// to the CallGraph
// get the global function table
GlobalVariable *func_table = module->getGlobalVariable("command_table");
if (func_table && func_table->getNumUses() > 0) {
errs()<<"[Global]: get command_table.\n";
}
else {
errs()<<"[Global]: miss command_table or command_table isn't used.\n";
return false;
}
// output the use list of func_table
for (Value::use_iterator ui = func_table->use_begin(); ui != func_table->use_end(); ui++) {
User *tmpuser = *ui;
// int coutn = 0;
if (tmpuser) {
//errs() << tmpuser->getName() << '\n';
//tmpuser->dump();
// find the function which calls command_table in Module module
for (Module::iterator mit = module->begin(); mit != module->end(); mit++) {
Function *ff = &*mit;
if (ff) {
for (inst_iterator fit = inst_begin(ff); fit != inst_end(ff); fit++) {
Instruction *tmpfi = &*fit;
// the function pointer table must be used in GetElementPtrInst
if (isa<GetElementPtrInst>(tmpfi)) {
//errs() << "tmpi has " << tmpfi->getNumOperands() << "operands.\n";
//tmpfi->dump();
//tmpfi->getOperand(0)->dump();
extend_calledFunctionMap(tmpfi, tmpuser, func_table, ff);
}
}
} else {
errs() << "Error: get function of module failed.\n";
mit->dump();
continue;
}
}
} else {
errs() << "get user failed.\n";
continue;
}
// errs() << "++++++there are " << coutn << " lines call command_table in all.\n";
}
return true;
// errs()<<"[Global]: "<<func_table->getName()<<"\n";
// errs()<<"[Global]: type ID is "<<func_table->getType()->getTypeID()<<'\n';
}
