Record support in VPI

[Scafir]

Description
It is currently not possible to access records using the VPI. This is a known issue, but currently does not have a bug report associated to it. I hope making this one will help tracking and awareness of the issue.

Related materials:

• Merge request (WIP): WIP: Support records in vpi #1249
• Cocotb related issue: GHDL unable to access record types cocotb/cocotb#2591
• Related issue: Array support in VPI #237

Expected behaviour
Records should be accessible through the VPI.

How to reproduce?
records.zip

-- sample.vhd
library ieee;
use ieee.std_logic_1164.all;

package recordPkg is

    type myRecordT is record
        a : std_logic;
    end record myRecordT;

end package recordPkg;

library ieee;
use ieee.std_logic_1164.all;
use work.recordPkg.all;

entity sample is
    port(
        rec : in myRecordT
    );
end sample;

architecture structure of sample is
begin
end structure;

# test_sample.py
import cocotb
from cocotb.triggers import RisingEdge, ClockCycles, Timer, FallingEdge
from cocotb.clock import Clock

@cocotb.test()
async def type_test(dut):
    # Reading
    print(dut.rec.a)

    # Writing
    dut.rec.a = 0

    await Timer(1, 'step')

    assert dut.rec.a == 0, "rec.a was not updated"

# Makefile
VHDL_SOURCES = $(PWD)/sample.vhd
MODULE = test_sample
TOPLEVEL = sample
SIM = ghdl
SIM_ARGS = "--wave=a.ghw"

include $(shell cocotb-config --makefiles)/Makefile.sim

Context
Please, provide the following information:

• OS: Fedora Linux 37 (Workstation Edition)
• Origin:
  • Package manager: version
  • Released binaries: tarball_url
  • Built from sources: 65a40a0