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Fix FunC UB (#656)

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* Fix UB in func

* Improve optimizing int consts and unused variables in FunC

* Bump funC version to 0.4.3

* Fix analyzing repeat loop

---------

Co-authored-by: SpyCheese <mikle98@yandex.ru>
This commit is contained in:
EmelyanenkoK 2023-04-03 10:13:39 +03:00 • committed by GitHub
parent f51eb2d747
commit 8eb167b76a
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GPG key ID: 4AEE18F83AFDEB23
8 changed files with 31 additions and 8 deletions
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10
crypto/func/parse-func.cpp
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@ -172,6 +172,10 @@ FormalArg parse_formal_arg(Lexer& lex, int fa_idx) {
lex.expect(_Ident, "formal parameter name");
}
loc = lex.cur().loc;
if (prohibited_var_names.count(sym::symbols.get_name(lex.cur().val))) {
throw src::ParseError{
loc, PSTRING() << "symbol `" << sym::symbols.get_name(lex.cur().val) << "` cannot be redefined as a variable"};
}
SymDef* new_sym_def = sym::define_symbol(lex.cur().val, true, loc);
if (!new_sym_def) {
lex.cur().error_at("cannot define symbol `", "`");
@ -397,7 +401,7 @@ bool check_global_func(const Lexem& cur, sym_idx_t func_name = 0) {
def = sym::define_global_symbol(func_name, 0, cur.loc);
assert(def && "cannot define global function");
++undef_func_cnt;
make_new_glob_func(def, TypeExpr::new_hole()); // was: ... ::new_func()
make_new_glob_func(def, TypeExpr::new_func()); // was: ... ::new_func()
return true;
}
SymVal* val = dynamic_cast<SymVal*>(def->value);
@ -1369,6 +1373,10 @@ std::vector<TypeExpr*> parse_type_var_list(Lexer& lex) {
throw src::ParseError{lex.cur().loc, "free type identifier expected"};
}
auto loc = lex.cur().loc;
if (prohibited_var_names.count(sym::symbols.get_name(lex.cur().val))) {
throw src::ParseError{loc, PSTRING() << "symbol `" << sym::symbols.get_name(lex.cur().val)
<< "` cannot be redefined as a variable"};
}
SymDef* new_sym_def = sym::define_symbol(lex.cur().val, true, loc);
if (!new_sym_def || new_sym_def->value) {
lex.cur().error_at("redefined type variable `", "`");