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/*
This file is part of cpp-ethereum.
cpp-ethereum is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
cpp-ethereum is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with cpp-ethereum. If not, see <http://www.gnu.org/licenses/>.
*/
/**
* @author Christian <c@ethdev.com>
* @date 2014
* Unit tests for the solidity compiler.
*/
#include <string>
#include <iostream>
#include <boost/test/unit_test.hpp>
#include <libdevcore/Log.h>
#include <libsolidity/Scanner.h>
#include <libsolidity/Parser.h>
#include <libsolidity/NameAndTypeResolver.h>
#include <libsolidity/Compiler.h>
#include <libsolidity/AST.h>
using namespace std;
using namespace dev::eth;
namespace dev
{
namespace solidity
{
namespace test
{
namespace
{
bytes compileContract(const string& _sourceCode)
{
Parser parser;
ASTPointer<ContractDefinition> contract;
BOOST_REQUIRE_NO_THROW(contract = parser.parse(make_shared<Scanner>(CharStream(_sourceCode))));
NameAndTypeResolver resolver;
BOOST_REQUIRE_NO_THROW(resolver.resolveNamesAndTypes(*contract));
Compiler compiler;
compiler.compileContract(*contract);
// debug
//compiler.streamAssembly(cout);
return compiler.getAssembledBytecode();
}
/// Checks that @a _compiledCode is present starting from offset @a _offset in @a _expectation.
/// This is necessary since the compiler will add boilerplate add the beginning that is not
/// tested here.
void checkCodePresentAt(bytes const& _compiledCode, bytes const& _expectation, unsigned _offset)
{
BOOST_REQUIRE(_compiledCode.size() >= _offset + _expectation.size());
auto checkStart = _compiledCode.begin() + _offset;
BOOST_CHECK_EQUAL_COLLECTIONS(checkStart, checkStart + _expectation.size(),
_expectation.begin(), _expectation.end());
}
} // end anonymous namespace
BOOST_AUTO_TEST_SUITE(SolidityCompiler)
BOOST_AUTO_TEST_CASE(smoke_test)
{
char const* sourceCode = "contract test {\n"
" function f() { var x = 2; }\n"
"}\n";
bytes code = compileContract(sourceCode);
unsigned boilerplateSize = 51;
bytes expectation({byte(Instruction::JUMPDEST),
byte(Instruction::PUSH1), 0x0, // initialize local variable x
byte(Instruction::PUSH1), 0x2,
byte(Instruction::SWAP1),
byte(Instruction::POP),
byte(Instruction::JUMPDEST),
byte(Instruction::POP),
byte(Instruction::JUMP)});
checkCodePresentAt(code, expectation, boilerplateSize);
}
BOOST_AUTO_TEST_CASE(different_argument_numbers)
{
char const* sourceCode = "contract test {\n"
" function f(uint a, uint b, uint c) returns(uint d) { return b; }\n"
" function g() returns (uint e, uint h) { h = f(1, 2, 3); }\n"
"}\n";
bytes code = compileContract(sourceCode);
unsigned shift = 75;
unsigned boilerplateSize = 88;
bytes expectation({byte(Instruction::JUMPDEST),
byte(Instruction::PUSH1), 0x0, // initialize return variable d
byte(Instruction::DUP3),
byte(Instruction::SWAP1), // assign b to d
byte(Instruction::POP),
byte(Instruction::PUSH1), byte(0xa + shift), // jump to return
byte(Instruction::JUMP),
byte(Instruction::JUMPDEST),
byte(Instruction::SWAP4), // store d and fetch return address
byte(Instruction::SWAP3), // store return address
byte(Instruction::POP),
byte(Instruction::POP),
byte(Instruction::POP),
byte(Instruction::JUMP), // end of f
byte(Instruction::JUMPDEST), // beginning of g
byte(Instruction::PUSH1), 0x0,
byte(Instruction::DUP1), // initialized e and h
byte(Instruction::PUSH1), byte(0x20 + shift), // ret address
byte(Instruction::PUSH1), 0x1,
byte(Instruction::PUSH1), 0x2,
byte(Instruction::PUSH1), 0x3,
byte(Instruction::PUSH1), byte(0x1 + shift),
// stack here: ret e h 0x20 1 2 3 0x1
byte(Instruction::JUMP),
byte(Instruction::JUMPDEST),
// stack here: ret e h f(1,2,3)
byte(Instruction::DUP2),
byte(Instruction::POP),
byte(Instruction::SWAP1),
// stack here: ret e f(1,2,3) h
byte(Instruction::POP),
byte(Instruction::DUP1), // retrieve it again as "value of expression"
byte(Instruction::POP), // end of assignment
// stack here: ret e f(1,2,3)
byte(Instruction::JUMPDEST),
byte(Instruction::SWAP1),
// ret e f(1,2,3)
byte(Instruction::SWAP2),
// f(1,2,3) e ret
byte(Instruction::JUMP) // end of g
});
checkCodePresentAt(code, expectation, boilerplateSize);
}
BOOST_AUTO_TEST_CASE(ifStatement)
{
char const* sourceCode = "contract test {\n"
" function f() { bool x; if (x) 77; else if (!x) 78; else 79; }"
"}\n";
bytes code = compileContract(sourceCode);
unsigned shift = 38;
unsigned boilerplateSize = 51;
bytes expectation({byte(Instruction::JUMPDEST),
byte(Instruction::PUSH1), 0x0,
byte(Instruction::DUP1),
byte(Instruction::PUSH1), byte(0x1b + shift), // "true" target
byte(Instruction::JUMPI),
// new check "else if" condition
byte(Instruction::DUP1),
byte(Instruction::ISZERO),
byte(Instruction::PUSH1), byte(0x13 + shift),
byte(Instruction::JUMPI),
// "else" body
byte(Instruction::PUSH1), 0x4f,
byte(Instruction::POP),
byte(Instruction::PUSH1), byte(0x17 + shift), // exit path of second part
byte(Instruction::JUMP),
// "else if" body
byte(Instruction::JUMPDEST),
byte(Instruction::PUSH1), 0x4e,
byte(Instruction::POP),
byte(Instruction::JUMPDEST),
byte(Instruction::PUSH1), byte(0x1f + shift),
byte(Instruction::JUMP),
// "if" body
byte(Instruction::JUMPDEST),
byte(Instruction::PUSH1), 0x4d,
byte(Instruction::POP),
byte(Instruction::JUMPDEST),
byte(Instruction::JUMPDEST),
byte(Instruction::POP),
byte(Instruction::JUMP)});
checkCodePresentAt(code, expectation, boilerplateSize);
}
BOOST_AUTO_TEST_CASE(loops)
{
char const* sourceCode = "contract test {\n"
" function f() { while(true){1;break;2;continue;3;return;4;} }"
"}\n";
bytes code = compileContract(sourceCode);
unsigned shift = 38;
unsigned boilerplateSize = 51;
bytes expectation({byte(Instruction::JUMPDEST),
byte(Instruction::JUMPDEST),
byte(Instruction::PUSH1), 0x1,
byte(Instruction::ISZERO),
byte(Instruction::PUSH1), byte(0x21 + shift),
byte(Instruction::JUMPI),
byte(Instruction::PUSH1), 0x1,
byte(Instruction::POP),
byte(Instruction::PUSH1), byte(0x21 + shift),
byte(Instruction::JUMP), // break
byte(Instruction::PUSH1), 0x2,
byte(Instruction::POP),
byte(Instruction::PUSH1), byte(0x2 + shift),
byte(Instruction::JUMP), // continue
byte(Instruction::PUSH1), 0x3,
byte(Instruction::POP),
byte(Instruction::PUSH1), byte(0x22 + shift),
byte(Instruction::JUMP), // return
byte(Instruction::PUSH1), 0x4,
byte(Instruction::POP),
byte(Instruction::PUSH1), byte(0x2 + shift),
byte(Instruction::JUMP),
byte(Instruction::JUMPDEST),
byte(Instruction::JUMPDEST),
byte(Instruction::JUMP)});
checkCodePresentAt(code, expectation, boilerplateSize);
}
BOOST_AUTO_TEST_SUITE_END()
}
}
} // end namespaces
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