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Merge pull request #6911 from ethereum/asmCallTrailingComma

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AsmParser: Disallow trailing commas in function call arguments.
This commit is contained in:
Mathias L. Baumann 2019-06-06 14:05:11 +02:00 committed by GitHub
commit 44c774af4b
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6 changed files with 32 additions and 8 deletions
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1
Changelog.md
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@ -9,6 +9,7 @@ Compiler Features:
Bugfixes:
* Yul / Inline Assembly Parser: Disallow trailing commas in function call arguments.
Build System:

5
libsolidity/codegen/ir/IRGeneratorForStatements.cpp
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@ -550,13 +550,14 @@ void IRGeneratorForStatements::endVisit(FunctionCall const& _functionCall)
solAssert(arguments.size() > 0, "Expected at least one parameter for require/assert");
solAssert(arguments.size() <= 2, "Expected no more than two parameters for require/assert");
Type const* messageArgumentType = arguments.size() > 1 ? arguments[1]->annotation().type : nullptr;
string requireOrAssertFunction = m_utils.requireOrAssertFunction(
functionType->kind() == FunctionType::Kind::Assert,
arguments.size() > 1 ? arguments[1]->annotation().type : nullptr
messageArgumentType
);
m_code << move(requireOrAssertFunction) << "(" << m_context.variable(*arguments[0]);
if (arguments.size() > 1)
if (messageArgumentType && messageArgumentType->sizeOnStack() > 0)
m_code << ", " << m_context.variable(*arguments[1]);
m_code << ")\n";

10
libyul/AsmParser.cpp
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@ -609,12 +609,14 @@ Expression Parser::parseCall(Parser::ElementaryOperation&& _initialOp)
else
ret = std::move(boost::get<FunctionCall>(_initialOp));
expectToken(Token::LParen);
while (currentToken() != Token::RParen)
if (currentToken() != Token::RParen)
{
ret.arguments.emplace_back(parseExpression());
if (currentToken() == Token::RParen)
break;
expectToken(Token::Comma);
while (currentToken() != Token::RParen)
{
expectToken(Token::Comma);
ret.arguments.emplace_back(parseExpression());
}
}
ret.location.end = endPosition();
expectToken(Token::RParen);

3
test/libsolidity/syntaxTests/inlineAssembly/invalid/empty_fun_arg.sol → test/libsolidity/syntaxTests/inlineAssembly/invalid/empty_fun_arg_beginning.sol
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@ -3,10 +3,9 @@ contract C {
assembly {
function f(a, b) {}
f()
f(1,)
f(,1)
}
}
}
// ----
// ParserError: (113-114): Literal, identifier or instruction expected.
// ParserError: (101-102): Literal, identifier or instruction expected.

11
test/libsolidity/syntaxTests/inlineAssembly/invalid/empty_fun_arg_end.sol Normal file
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@ -0,0 +1,11 @@
contract C {
function f() public pure {
assembly {
function f(a, b) {}
f()
f(1,)
}
}
}
// ----
// ParserError: (103-104): Literal, identifier or instruction expected.

10
test/libsolidity/syntaxTests/inlineAssembly/invalid/empty_fun_arg_middle.sol Normal file
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@ -0,0 +1,10 @@
contract C {
function f() public pure {
assembly {
function f(a, b, c) {}
f(1,,1)
}
}
}
// ----
// ParserError: (96-97): Literal, identifier or instruction expected.