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/*
    This file is part of solidity.

    solidity 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.

    solidity 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 solidity.  If not, see <http://www.gnu.org/licenses/>.
*/
/**
 * @author Alex Beregszaszi
 * @date 2017
 * Unit tests for the LLL compiler.
 */

#include <string>
#include <memory>
#include <boost/test/unit_test.hpp>
#include <liblll/Compiler.h>
#include <libdevcore/FixedHash.h>

using namespace std;

namespace dev
{
namespace lll
{
namespace test
{

namespace
{

bool successCompile(string const& _sourceCode)
{
    vector<string> errors;
    bytes bytecode = eth::compileLLL(_sourceCode, false, &errors);
    if (!errors.empty())
        return false;
    if (bytecode.empty())
        return false;
    return true;
}

}

BOOST_AUTO_TEST_SUITE(LLLCompiler)

BOOST_AUTO_TEST_CASE(smoke_test)
{
    char const* sourceCode = "1";
    BOOST_CHECK(successCompile(sourceCode));
}

BOOST_AUTO_TEST_CASE(switch_valid)
{
    char const* sourceCode = R"(
        (switch (origin))
    )";
    BOOST_CHECK(successCompile(sourceCode));
    sourceCode = R"(
        (switch
            1 (panic)
            2 (panic))
    )";
    BOOST_CHECK(successCompile(sourceCode));
    sourceCode = R"(
        (switch
            1 (panic)
            2 (panic)
            (panic))
    )";
    BOOST_CHECK(successCompile(sourceCode));
    sourceCode = R"(
        (switch
            1 (origin)
            2 (origin)
            (origin))
    )";
    BOOST_CHECK(successCompile(sourceCode));
}

BOOST_AUTO_TEST_CASE(switch_invalid_arg_count)
{
    char const* sourceCode = R"(
        (switch)
    )";
    BOOST_CHECK(!successCompile(sourceCode));
}

BOOST_AUTO_TEST_CASE(switch_inconsistent_return_count)
{
    // cannot return stack items if the default case is not present
    char const* sourceCode = R"(
        (switch
            1 (origin)
            2 (origin)
    )";
    BOOST_CHECK(!successCompile(sourceCode));
    // return count mismatch
    sourceCode = R"(
        (switch
            1 (origin)
            2 (origin)
            (panic))
    )";
    BOOST_CHECK(!successCompile(sourceCode));
    // return count mismatch
    sourceCode = R"(
        (switch
            1 (panic)
            2 (panic)
            (origin))
    )";
    BOOST_CHECK(!successCompile(sourceCode));
}

BOOST_AUTO_TEST_CASE(disallowed_asm_instructions)
{
    for (unsigned i = 1; i <= 32; i++)
        BOOST_CHECK(!successCompile("(asm PUSH" + boost::lexical_cast<string>(i) + ")"));
}

BOOST_AUTO_TEST_CASE(disallowed_functional_asm_instructions)
{
    for (unsigned i = 1; i <= 32; i++)
        BOOST_CHECK(!successCompile("(PUSH" + boost::lexical_cast<string>(i) + ")"));
    for (unsigned i = 1; i <= 16; i++)
        BOOST_CHECK(!successCompile("(DUP" + boost::lexical_cast<string>(i) + ")"));
    for (unsigned i = 1; i <= 16; i++)
        BOOST_CHECK(!successCompile("(SWAP" + boost::lexical_cast<string>(i) + ")"));
    BOOST_CHECK(!successCompile("(JUMPDEST)"));
}

BOOST_AUTO_TEST_CASE(valid_opcodes_functional)
{
    vector<string> opcodes_bytecode {
        "00",
        "6000600001",
        "6000600002",
        "6000600003",
        "6000600004",
        "6000600005",
        "6000600006",
        "6000600007",
        "60006000600008",
        "60006000600009",
        "600060000a",
        "600060000b",
        "6000600010",
        "6000600011",
        "6000600012",
        "6000600013",
        "6000600014",
        "600015",
        "6000600016",
        "6000600017",
        "6000600018",
        "600019",
        "600060001a",
        "6000600020",
        "30",
        "600031",
        "32",
        "33",
        "34",
        "600035",
        "36",
        "60006000600037",
        "38",
        "60006000600039",
        "3a",
        "60003b",
        "60006000600060003c",
        "3d",
        "6000600060003e",
        "600040",
        "41",
        "42",
        "43",
        "44",
        "45",
        "600050",
        "600051",
        "6000600052",
        "6000600053",
        "600054",
        "6000600055",
        "600056",
        "6000600057",
        "58",
        "59",
        "5a",
        "60ff",
        "61ffff",
        "62ffffff",
        "63ffffffff",
        "64ffffffffff",
        "65ffffffffffff",
        "66ffffffffffffff",
        "67ffffffffffffffff",
        "68ffffffffffffffffff",
        "69ffffffffffffffffffff",
        "6affffffffffffffffffffff",
        "6bffffffffffffffffffffffff",
        "6cffffffffffffffffffffffffff",
        "6dffffffffffffffffffffffffffff",
        "6effffffffffffffffffffffffffffff",
        "6fffffffffffffffffffffffffffffffff",
        "70ffffffffffffffffffffffffffffffffff",
        "71ffffffffffffffffffffffffffffffffffff",
        "72ffffffffffffffffffffffffffffffffffffff",
        "73ffffffffffffffffffffffffffffffffffffffff",
        "74ffffffffffffffffffffffffffffffffffffffffff",
        "75ffffffffffffffffffffffffffffffffffffffffffff",
        "76ffffffffffffffffffffffffffffffffffffffffffffff",
        "77ffffffffffffffffffffffffffffffffffffffffffffffff",
        "78ffffffffffffffffffffffffffffffffffffffffffffffffff",
        "79ffffffffffffffffffffffffffffffffffffffffffffffffffff",
        "7affffffffffffffffffffffffffffffffffffffffffffffffffffff",
        "7bffffffffffffffffffffffffffffffffffffffffffffffffffffffff",
        "7cffffffffffffffffffffffffffffffffffffffffffffffffffffffffff",
        "7dffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff",
        "7effffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff",
        "7fffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff",
        "60006000a0",
        "600060006000a1",
        "6000600060006000a2",
        "60006000600060006000a3",
        "600060006000600060006000a4",
        "600060006000f0",
        "6000600060006000600060006000f1",
        "6000600060006000600060006000f2",
        "60006000f3",
        "600060006000600060006000f4",
        "600060006000600060006000fa",
        "60006000fd",
        "fe",
        "6000ff"
    };

    vector<string> opcodes_lll {
        "{ (STOP) }",
        "{ (ADD 0 0) }",
        "{ (MUL 0 0) }",
        "{ (SUB 0 0) }",
        "{ (DIV 0 0) }",
        "{ (SDIV 0 0) }",
        "{ (MOD 0 0) }",
        "{ (SMOD 0 0) }",
        "{ (ADDMOD 0 0 0) }",
        "{ (MULMOD 0 0 0) }",
        "{ (EXP 0 0) }",
        "{ (SIGNEXTEND 0 0) }",
        "{ (LT 0 0) }",
        "{ (GT 0 0) }",
        "{ (SLT 0 0) }",
        "{ (SGT 0 0) }",
        "{ (EQ 0 0) }",
        "{ (ISZERO 0) }",
        "{ (AND 0 0) }",
        "{ (OR 0 0) }",
        "{ (XOR 0 0) }",
        "{ (NOT 0) }",
        "{ (BYTE 0 0) }",
        "{ (KECCAK256 0 0) }",
        "{ (ADDRESS) }",
        "{ (BALANCE 0) }",
        "{ (ORIGIN) }",
        "{ (CALLER) }",
        "{ (CALLVALUE) }",
        "{ (CALLDATALOAD 0) }",
        "{ (CALLDATASIZE) }",
        "{ (CALLDATACOPY 0 0 0) }",
        "{ (CODESIZE) }",
        "{ (CODECOPY 0 0 0) }",
        "{ (GASPRICE) }",
        "{ (EXTCODESIZE 0) }",
        "{ (EXTCODECOPY 0 0 0 0) }",
        "{ (RETURNDATASIZE) }",
        "{ (RETURNDATACOPY 0 0 0) }",
        "{ (BLOCKHASH 0) }",
        "{ (COINBASE) }",
        "{ (TIMESTAMP) }",
        "{ (NUMBER) }",
        "{ (DIFFICULTY) }",
        "{ (GASLIMIT) }",
        "{ (POP 0) }",
        "{ (MLOAD 0) }",
        "{ (MSTORE 0 0) }",
        "{ (MSTORE8 0 0) }",
        "{ (SLOAD 0) }",
        "{ (SSTORE 0 0) }",
        "{ (JUMP 0) }",
        "{ (JUMPI 0 0) }",
        "{ (PC) }",
        "{ (MSIZE) }",
        "{ (GAS) }",
        "{ 0xff }",
        "{ 0xffff }",
        "{ 0xffffff }",
        "{ 0xffffffff }",
        "{ 0xffffffffff }",
        "{ 0xffffffffffff }",
        "{ 0xffffffffffffff }",
        "{ 0xffffffffffffffff }",
        "{ 0xffffffffffffffffff }",
        "{ 0xffffffffffffffffffff }",
        "{ 0xffffffffffffffffffffff }",
        "{ 0xffffffffffffffffffffffff }",
        "{ 0xffffffffffffffffffffffffff }",
        "{ 0xffffffffffffffffffffffffffff }",
        "{ 0xffffffffffffffffffffffffffffff }",
        "{ 0xffffffffffffffffffffffffffffffff }",
        "{ 0xffffffffffffffffffffffffffffffffff }",
        "{ 0xffffffffffffffffffffffffffffffffffff }",
        "{ 0xffffffffffffffffffffffffffffffffffffff }",
        "{ 0xffffffffffffffffffffffffffffffffffffffff }",
        "{ 0xffffffffffffffffffffffffffffffffffffffffff }",
        "{ 0xffffffffffffffffffffffffffffffffffffffffffff }",
        "{ 0xffffffffffffffffffffffffffffffffffffffffffffff }",
        "{ 0xffffffffffffffffffffffffffffffffffffffffffffffff }",
        "{ 0xffffffffffffffffffffffffffffffffffffffffffffffffff }",
        "{ 0xffffffffffffffffffffffffffffffffffffffffffffffffffff }",
        "{ 0xffffffffffffffffffffffffffffffffffffffffffffffffffffff }",
        "{ 0xffffffffffffffffffffffffffffffffffffffffffffffffffffffff }",
        "{ 0xffffffffffffffffffffffffffffffffffffffffffffffffffffffffff }",
        "{ 0xffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff }",
        "{ 0xffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff }",
        "{ 0xffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff }",
        "{ (LOG0 0 0) }",
        "{ (LOG1 0 0 0) }",
        "{ (LOG2 0 0 0 0) }",
        "{ (LOG3 0 0 0 0 0) }",
        "{ (LOG4 0 0 0 0 0 0) }",
        "{ (CREATE 0 0 0) }",
        "{ (CALL 0 0 0 0 0 0 0) }",
        "{ (CALLCODE 0 0 0 0 0 0 0) }",
        "{ (RETURN 0 0) }",
        "{ (DELEGATECALL 0 0 0 0 0 0) }",
        "{ (STATICCALL 0 0 0 0 0 0) }",
        "{ (REVERT 0 0) }",
        "{ (INVALID) }",
        "{ (SELFDESTRUCT 0) }"
    };

    for (size_t i = 0; i < opcodes_bytecode.size(); i++) {
        vector<string> errors;
        bytes code = eth::compileLLL(opcodes_lll[i], false, &errors);

        BOOST_REQUIRE_MESSAGE(errors.empty(), opcodes_lll[i]);

        BOOST_CHECK_EQUAL(toHex(code), opcodes_bytecode[i]);
    }
}

BOOST_AUTO_TEST_CASE(valid_opcodes_asm)
{
    vector<string> opcodes_bytecode {
        "00",
        "01",
        "02",
        "03",
        "04",
        "05",
        "06",
        "07",
        "08",
        "09",
        "0a",
        "0b",
        "10",
        "11",
        "12",
        "13",
        "14",
        "15",
        "16",
        "17",
        "18",
        "19",
        "1a",
        "20",
        "30",
        "31",
        "32",
        "33",
        "34",
        "35",
        "36",
        "37",
        "38",
        "39",
        "3a",
        "3b",
        "3c",
        "3d",
        "3e",
        "40",
        "41",
        "42",
        "43",
        "44",
        "45",
        "50",
        "51",
        "52",
        "53",
        "54",
        "55",
        "56",
        "57",
        "58",
        "59",
        "5a",
        "5b",
        "60ff",
        "61ffff",
        "62ffffff",
        "63ffffffff",
        "64ffffffffff",
        "65ffffffffffff",
        "66ffffffffffffff",
        "67ffffffffffffffff",
        "68ffffffffffffffffff",
        "69ffffffffffffffffffff",
        "6affffffffffffffffffffff",
        "6bffffffffffffffffffffffff",
        "6cffffffffffffffffffffffffff",
        "6dffffffffffffffffffffffffffff",
        "6effffffffffffffffffffffffffffff",
        "6fffffffffffffffffffffffffffffffff",
        "70ffffffffffffffffffffffffffffffffff",
        "71ffffffffffffffffffffffffffffffffffff",
        "72ffffffffffffffffffffffffffffffffffffff",
        "73ffffffffffffffffffffffffffffffffffffffff",
        "74ffffffffffffffffffffffffffffffffffffffffff",
        "75ffffffffffffffffffffffffffffffffffffffffffff",
        "76ffffffffffffffffffffffffffffffffffffffffffffff",
        "77ffffffffffffffffffffffffffffffffffffffffffffffff",
        "78ffffffffffffffffffffffffffffffffffffffffffffffffff",
        "79ffffffffffffffffffffffffffffffffffffffffffffffffffff",
        "7affffffffffffffffffffffffffffffffffffffffffffffffffffff",
        "7bffffffffffffffffffffffffffffffffffffffffffffffffffffffff",
        "7cffffffffffffffffffffffffffffffffffffffffffffffffffffffffff",
        "7dffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff",
        "7effffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff",
        "7fffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff",
        "80",
        "81",
        "82",
        "83",
        "84",
        "85",
        "86",
        "87",
        "88",
        "89",
        "8a",
        "8b",
        "8c",
        "8d",
        "8e",
        "8f",
        "90",
        "91",
        "92",
        "93",
        "94",
        "95",
        "96",
        "97",
        "98",
        "99",
        "9a",
        "9b",
        "9c",
        "9d",
        "9e",
        "9f",
        "a0",
        "a1",
        "a2",
        "a3",
        "a4",
        "f0",
        "f1",
        "f2",
        "f3",
        "f4",
        "fa",
        "fd",
        "fe",
        "ff"
    };

    vector<string> opcodes_lll {
        "{ (asm STOP) }",
        "{ (asm ADD) }",
        "{ (asm MUL) }",
        "{ (asm SUB) }",
        "{ (asm DIV) }",
        "{ (asm SDIV ) }",
        "{ (asm MOD) }",
        "{ (asm SMOD) }",
        "{ (asm ADDMOD) }",
        "{ (asm MULMOD) }",
        "{ (asm EXP) }",
        "{ (asm SIGNEXTEND) }",
        "{ (asm LT) }",
        "{ (asm GT) }",
        "{ (asm SLT) }",
        "{ (asm SGT) }",
        "{ (asm EQ) }",
        "{ (asm ISZERO) }",
        "{ (asm AND) }",
        "{ (asm OR) }",
        "{ (asm XOR) }",
        "{ (asm NOT) }",
        "{ (asm BYTE) }",
        "{ (asm KECCAK256) }",
        "{ (asm ADDRESS) }",
        "{ (asm BALANCE) }",
        "{ (asm ORIGIN) }",
        "{ (asm CALLER) }",
        "{ (asm CALLVALUE) }",
        "{ (asm CALLDATALOAD) }",
        "{ (asm CALLDATASIZE) }",
        "{ (asm CALLDATACOPY) }",
        "{ (asm CODESIZE) }",
        "{ (asm CODECOPY) }",
        "{ (asm GASPRICE) }",
        "{ (asm EXTCODESIZE)}",
        "{ (asm EXTCODECOPY) }",
        "{ (asm RETURNDATASIZE) }",
        "{ (asm RETURNDATACOPY) }",
        "{ (asm BLOCKHASH) }",
        "{ (asm COINBASE) }",
        "{ (asm TIMESTAMP) }",
        "{ (asm NUMBER) }",
        "{ (asm DIFFICULTY) }",
        "{ (asm GASLIMIT) }",
        "{ (asm POP) }",
        "{ (asm MLOAD) }",
        "{ (asm MSTORE) }",
        "{ (asm MSTORE8) }",
        "{ (asm SLOAD) }",
        "{ (asm SSTORE) }",
        "{ (asm JUMP ) }",
        "{ (asm JUMPI ) }",
        "{ (asm PC) }",
        "{ (asm MSIZE) }",
        "{ (asm GAS) }",
        "{ (asm JUMPDEST) }",
        "{ (asm 0xff) }",
        "{ (asm 0xffff) }",
        "{ (asm 0xffffff) }",
        "{ (asm 0xffffffff) }",
        "{ (asm 0xffffffffff) }",
        "{ (asm 0xffffffffffff) }",
        "{ (asm 0xffffffffffffff) }",
        "{ (asm 0xffffffffffffffff) }",
        "{ (asm 0xffffffffffffffffff) }",
        "{ (asm 0xffffffffffffffffffff) }",
        "{ (asm 0xffffffffffffffffffffff) }",
        "{ (asm 0xffffffffffffffffffffffff) }",
        "{ (asm 0xffffffffffffffffffffffffff) }",
        "{ (asm 0xffffffffffffffffffffffffffff) }",
        "{ (asm 0xffffffffffffffffffffffffffffff) }",
        "{ (asm 0xffffffffffffffffffffffffffffffff) }",
        "{ (asm 0xffffffffffffffffffffffffffffffffff) }",
        "{ (asm 0xffffffffffffffffffffffffffffffffffff) }",
        "{ (asm 0xffffffffffffffffffffffffffffffffffffff) }",
        "{ (asm 0xffffffffffffffffffffffffffffffffffffffff) }",
        "{ (asm 0xffffffffffffffffffffffffffffffffffffffffff) }",
        "{ (asm 0xffffffffffffffffffffffffffffffffffffffffffff) }",
        "{ (asm 0xffffffffffffffffffffffffffffffffffffffffffffff) }",
        "{ (asm 0xffffffffffffffffffffffffffffffffffffffffffffffff) }",
        "{ (asm 0xffffffffffffffffffffffffffffffffffffffffffffffffff) }",
        "{ (asm 0xffffffffffffffffffffffffffffffffffffffffffffffffffff) }",
        "{ (asm 0xffffffffffffffffffffffffffffffffffffffffffffffffffffff) }",
        "{ (asm 0xffffffffffffffffffffffffffffffffffffffffffffffffffffffff) }",
        "{ (asm 0xffffffffffffffffffffffffffffffffffffffffffffffffffffffffff) }",
        "{ (asm 0xffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff) }",
        "{ (asm 0xffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff) }",
        "{ (asm 0xffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff) }",
        "{ (asm DUP1) }",
        "{ (asm DUP2) }",
        "{ (asm DUP3) }",
        "{ (asm DUP4) }",
        "{ (asm DUP5) }",
        "{ (asm DUP6) }",
        "{ (asm DUP7) }",
        "{ (asm DUP8) }",
        "{ (asm DUP9) }",
        "{ (asm DUP10) }",
        "{ (asm DUP11) }",
        "{ (asm DUP12) }",
        "{ (asm DUP13) }",
        "{ (asm DUP14) }",
        "{ (asm DUP15) }",
        "{ (asm DUP16) }",
        "{ (asm SWAP1) }",
        "{ (asm SWAP2) }",
        "{ (asm SWAP3) }",
        "{ (asm SWAP4) }",
        "{ (asm SWAP5) }",
        "{ (asm SWAP6) }",
        "{ (asm SWAP7) }",
        "{ (asm SWAP8) }",
        "{ (asm SWAP9) }",
        "{ (asm SWAP10) }",
        "{ (asm SWAP11) }",
        "{ (asm SWAP12) }",
        "{ (asm SWAP13) }",
        "{ (asm SWAP14) }",
        "{ (asm SWAP15) }",
        "{ (asm SWAP16) }",
        "{ (asm LOG0) }",
        "{ (asm LOG1) }",
        "{ (asm LOG2) }",
        "{ (asm LOG3) }",
        "{ (asm LOG4) }",
        "{ (asm CREATE) }",
        "{ (asm CALL) }",
        "{ (asm CALLCODE) }",
        "{ (asm RETURN) }",
        "{ (asm DELEGATECALL) }",
        "{ (asm STATICCALL) }",
        "{ (asm REVERT) }",
        "{ (asm INVALID) }",
        "{ (asm SELFDESTRUCT) }"
    };

    for (size_t i = 0; i < opcodes_bytecode.size(); i++) {
        vector<string> errors;
        bytes code = eth::compileLLL(opcodes_lll[i], false, &errors);

        BOOST_REQUIRE_MESSAGE(errors.empty(), opcodes_lll[i]);

        BOOST_CHECK_EQUAL(toHex(code), opcodes_bytecode[i]);
    }
}

BOOST_AUTO_TEST_SUITE_END()

}
}
} // end namespaces