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Merge pull request #1705 from ethereum/fixasmbug

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Bugfix: Deposit one stack item for non-value types in inline assembly type checking.
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chriseth 2017-02-20 15:20:12 +01:00 committed by GitHub
commit 32b7d17467
3 changed files with 15 additions and 1 deletions
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1
Changelog.md
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@ -11,6 +11,7 @@ Bugfixes:
* Commandline interface: Do not try creating paths ``.`` and ``..``.
* Type system: Fix a crash caused by continuing on fatal errors in the code.
* Type system: Disallow arrays with negative length.
* Inline assembly: Charge one stack slot for non-value types during analysis.
### 0.4.9 (2017-01-31)

2
libsolidity/analysis/TypeChecker.cpp
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@ -611,7 +611,7 @@ bool TypeChecker::visit(InlineAssembly const& _inlineAssembly)
fatalTypeError(SourceLocation(), "Constant variables not yet implemented for inline assembly.");
if (var->isLocalVariable())
pushes = var->type()->sizeOnStack();
else if (var->type()->isValueType())
else if (!var->type()->isValueType())
pushes = 1;
else
pushes = 2; // slot number, intra slot offset

13
test/libsolidity/SolidityNameAndTypeResolution.cpp
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@ -4852,6 +4852,19 @@ BOOST_AUTO_TEST_CASE(inline_assembly_unbalanced_negative_stack)
CHECK_WARNING(text, "Inline assembly block is not balanced");
}
BOOST_AUTO_TEST_CASE(inline_assembly_unbalanced_two_stack_load)
{
char const* text = R"(
contract c {
uint8 x;
function f() {
assembly { x pop }
}
}
)";
CHECK_WARNING(text, "Inline assembly block is not balanced");
}
BOOST_AUTO_TEST_CASE(inline_assembly_in_modifier)
{
char const* text = R"(