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| author | Alex Beregszaszi <alex@rtfs.hu> | 2018-02-20 18:17:58 +0800 |
|---|---|---|
| committer | GitHub <noreply@github.com> | 2018-02-20 18:17:58 +0800 |
| commit | a6b52fdc34650c74597c1bcdc5075b6375c62650 (patch) | |
| tree | 93a9f3fe5139033e4c858adccaa635db1ed73a76 | |
| parent | 2a58b44b8bdb802747ea6b908350cfb61dc75bb9 (diff) | |
| parent | 83692360b1a3213fbe8a65b08b892980312b7ac1 (diff) | |
| download | dexon-solidity-a6b52fdc34650c74597c1bcdc5075b6375c62650.tar.gz dexon-solidity-a6b52fdc34650c74597c1bcdc5075b6375c62650.tar.zst dexon-solidity-a6b52fdc34650c74597c1bcdc5075b6375c62650.zip | |
Merge pull request #3550 from ethereum/offsetconstantsasm
Properly warn when using ``_offset`` and ``_slot`` for constants in inline assembly.
| -rw-r--r-- | Changelog.md | 1 | ||||
| -rw-r--r-- | libsolidity/analysis/TypeChecker.cpp | 12 | ||||
| -rw-r--r-- | test/libsolidity/SolidityNameAndTypeResolution.cpp | 15 |
3 files changed, 22 insertions, 6 deletions
diff --git a/Changelog.md b/Changelog.md index de0b742e..d6b83d6e 100644 --- a/Changelog.md +++ b/Changelog.md @@ -8,6 +8,7 @@ Features: Bugfixes: * JSON-AST: Add "documentation" property to function, event and modifier definition. * Standard JSON: catch errors properly when invalid "sources" are passed + * Type Checker: Properly warn when using ``_offset`` and ``_slot`` for constants in inline assembly. ### 0.4.20 (2018-02-14) diff --git a/libsolidity/analysis/TypeChecker.cpp b/libsolidity/analysis/TypeChecker.cpp index f62ddeb9..0ee16c89 100644 --- a/libsolidity/analysis/TypeChecker.cpp +++ b/libsolidity/analysis/TypeChecker.cpp @@ -804,7 +804,12 @@ bool TypeChecker::visit(InlineAssembly const& _inlineAssembly) solAssert(!!declaration, ""); if (auto var = dynamic_cast<VariableDeclaration const*>(declaration)) { - if (ref->second.isSlot || ref->second.isOffset) + if (var->isConstant()) + { + m_errorReporter.typeError(_identifier.location, "Constant variables not supported by inline assembly."); + return size_t(-1); + } + else if (ref->second.isSlot || ref->second.isOffset) { if (!var->isStateVariable() && !var->type()->dataStoredIn(DataLocation::Storage)) { @@ -817,11 +822,6 @@ bool TypeChecker::visit(InlineAssembly const& _inlineAssembly) return size_t(-1); } } - else if (var->isConstant()) - { - m_errorReporter.typeError(_identifier.location, "Constant variables not supported by inline assembly."); - return size_t(-1); - } else if (!var->isLocalVariable()) { m_errorReporter.typeError(_identifier.location, "Only local variables are supported. To access storage variables, use the _slot and _offset suffixes."); diff --git a/test/libsolidity/SolidityNameAndTypeResolution.cpp b/test/libsolidity/SolidityNameAndTypeResolution.cpp index 2b102312..7c03d7cb 100644 --- a/test/libsolidity/SolidityNameAndTypeResolution.cpp +++ b/test/libsolidity/SolidityNameAndTypeResolution.cpp @@ -5776,6 +5776,21 @@ BOOST_AUTO_TEST_CASE(inline_assembly_storage_variable_access_out_of_functions) CHECK_SUCCESS_NO_WARNINGS(text); } +BOOST_AUTO_TEST_CASE(inline_assembly_constant_variable_via_offset) +{ + char const* text = R"( + contract test { + uint constant x = 2; + function f() pure public { + assembly { + let r := x_offset + } + } + } + )"; + CHECK_ERROR(text, TypeError, "Constant variables not supported by inline assembly."); +} + BOOST_AUTO_TEST_CASE(inline_assembly_calldata_variables) { char const* text = R"( |