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LibJS: Do not execute scripts with parse errors

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This adds missing checks in several LibJS consumers.
This commit is contained in:
Stephan Unverwerth 2020-04-13 02:05:21 +02:00 • committed by Andreas Kling
parent 50b6b6ef86
commit 984c290ec0
Notes: sideshowbarker 2024-07-19 07:38:28 +09:00
4 changed files with 36 additions and 7 deletions
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2
Libraries/LibJS/Parser.h
View file

@ -72,7 +72,7 @@ public:
NonnullRefPtr<NewExpression> parse_new_expression();
RefPtr<FunctionExpression> try_parse_arrow_function_expression(bool expect_parens);
bool has_errors() const { return m_parser_state.m_has_errors; }
bool has_errors() const { return m_parser_state.m_lexer.has_errors() || m_parser_state.m_has_errors; }
private:
int operator_precedence(TokenType) const;

6
Libraries/LibWeb/DOM/Document.cpp
View file

@ -374,7 +374,11 @@ JS::Interpreter& Document::interpreter()
JS::Value Document::run_javascript(const StringView& source)
{
auto program = JS::Parser(JS::Lexer(source)).parse_program();
auto parser = JS::Parser(JS::Lexer(source));
auto program = parser.parse_program();
if (parser.has_errors()) {
return JS::js_undefined();
}
dbg() << "Document::run_javascript('" << source << "') will run:";
program->dump(0);
return document().interpreter().run(*program);

12
Libraries/LibWeb/DOM/HTMLScriptElement.cpp
View file

@ -59,7 +59,11 @@ void HTMLScriptElement::children_changed()
if (source.is_empty())
return;
auto program = JS::Parser(JS::Lexer(source)).parse_program();
auto parser = JS::Parser(JS::Lexer(source));
auto program = parser.parse_program();
if (parser.has_errors())
return;
document().interpreter().run(*program);
}
@ -90,7 +94,11 @@ void HTMLScriptElement::inserted_into(Node& new_parent)
return;
}
auto program = JS::Parser(JS::Lexer(source)).parse_program();
auto parser = JS::Parser(JS::Lexer(source));
auto program = parser.parse_program();
if (parser.has_errors())
return;
document().interpreter().run(*program);
}

23
Userland/js.cpp
View file

@ -328,9 +328,14 @@ JS::Value ReplObject::load_file(JS::Interpreter& interpreter)
} else {
source = file_contents;
}
auto program = JS::Parser(JS::Lexer(source)).parse_program();
auto parser = JS::Parser(JS::Lexer(source));
auto program = parser.parse_program();
if (dump_ast)
program->dump(0);
if (parser.has_errors())
continue;
interpreter.run(*program);
if (print_last_result)
print(interpreter.last_value());
@ -345,10 +350,16 @@ void repl(JS::Interpreter& interpreter)
if (piece.is_empty())
continue;
repl_statements.append(piece);
auto program = JS::Parser(JS::Lexer(piece)).parse_program();
auto parser = JS::Parser(JS::Lexer(piece));
auto program = parser.parse_program();
if (dump_ast)
program->dump(0);
if (parser.has_errors()) {
printf("Parse error\n");
continue;
}
interpreter.run(*program);
if (interpreter.exception()) {
printf("Uncaught exception: ");
@ -634,11 +645,17 @@ int main(int argc, char** argv)
} else {
source = file_contents;
}
auto program = JS::Parser(JS::Lexer(source)).parse_program();
auto parser = JS::Parser(JS::Lexer(source));
auto program = parser.parse_program();
if (dump_ast)
program->dump(0);
if (parser.has_errors()) {
printf("Parse Error\n");
return 1;
}
auto result = interpreter->run(*program);
if (interpreter->exception()) {