Function extcodecopy

category/vm/runtime/data.cpp:119–158

    template <Traits traits>
    void extcodecopy(
        Context *ctx, uint256_t const *address_ptr,
        uint256_t const *dest_offset_ptr, uint256_t const *offset_ptr,
        uint256_t const *size_ptr)
    {
        auto const size = ctx->get_memory_offset(*size_ptr);
        Memory::Offset dest_offset;

        if (*size > 0) {
            dest_offset = ctx->get_memory_offset(*dest_offset_ptr);

            ctx->expand_memory<traits>(dest_offset + size);

            auto const size_in_words = shr_ceil<5>(size);
            ctx->deduct_gas(size_in_words * bin<3>);
        }

        auto address = address_from_uint256(*address_ptr);

        if constexpr (traits::eip_2929_active()) {
            auto const access_status =
                ctx->host->access_account(ctx->context, &address);
            if (access_status == EVMC_ACCESS_COLD) {
                ctx->deduct_gas(traits::cold_account_cost());
            }
        }

        if (*size > 0) {
            auto const offset = clamp_cast<uint32_t>(*offset_ptr);

            auto *dest_ptr = ctx->memory.data + *dest_offset;
            auto const n = ctx->host->copy_code(
                ctx->context, &address, offset, dest_ptr, *size);

            auto *begin = dest_ptr + static_cast<uint32_t>(n);
            auto *end = dest_ptr + *size;

            std::fill(begin, end, 0);
        }
    }

    EXPLICIT_TRAITS(extcodecopy);