test_returndatasize_nonzero()

Documentation for tests/benchmark/compute/instruction/test_call_context.py::test_returndatasize_nonzero@892e6d1e.

Generate fixtures for these test cases for Amsterdam with:

fill -v tests/benchmark/compute/instruction/test_call_context.py::test_returndatasize_nonzero --gas-benchmark-values 1

Benchmark RETURNDATASIZE instruction with non-zero buffer.

• returned_size: the size of the returned data buffer.
• return_data_style: how returned data is produced for the opcode caller.

Source code in tests/benchmark/compute/instruction/test_call_context.py

@pytest.mark.repricing(
    return_data_style=ReturnDataStyle.IDENTITY,
)
@pytest.mark.parametrize(
    "return_data_style",
    [
        ReturnDataStyle.RETURN,
        ReturnDataStyle.REVERT,
        ReturnDataStyle.IDENTITY,
    ],
)
@pytest.mark.parametrize("returned_size", [0, 32, 256, 1024])
def test_returndatasize_nonzero(
    benchmark_test: BenchmarkTestFiller,
    pre: Alloc,
    returned_size: int,
    return_data_style: ReturnDataStyle,
) -> None:
    """
    Benchmark RETURNDATASIZE instruction with non-zero buffer.

    - returned_size: the size of the returned data buffer.
    - return_data_style: how returned data is produced for the opcode caller.
    """
    setup = Bytecode()
    if return_data_style != ReturnDataStyle.IDENTITY:
        setup += Op.STATICCALL(
            address=pre.deploy_contract(
                code=Op.REVERT(0, returned_size)
                if return_data_style == ReturnDataStyle.REVERT
                else Op.RETURN(0, returned_size)
            )
        )
    else:
        setup += Op.MSTORE8(0, 1) + Op.STATICCALL(
            address=0x04,  # Identity precompile
            args_size=returned_size,
        )

    benchmark_test(
        target_opcode=Op.RETURNDATASIZE,
        code_generator=JumpLoopGenerator(
            setup=setup, attack_block=Op.POP(Op.RETURNDATASIZE)
        ),
    )

Parametrized Test Cases

This test generates 12 parametrized test cases across 3 forks.