Registering VHPI ValueChange callback on field of signal with record type doesn't work #1045
Description
I found this issue while working with cocotb and NVC.
It returns the following error:
2.00ns ERROR gpi VHPI Error level 3: class kind vhpiSelectedNameK is not an object declaration
FILE /home/verysecretuser/simple.vhd:11
2.00ns ERROR gpi VHPI: Unable to register a callback handle for VHPI type vhpiCbValueChange(1001)
2.00ns ERROR gpi Failed to register a value change callback
With the following VHDL file:
library IEEE;
use IEEE.std_logic_1164.all;
entity simple is
end entity;
architecture rtl of simple is
type record_t is record
field : std_logic;
end record;
signal record_signal : record_t;
begin
record_signal.field <= '0';
end architecture;And following cocotb test:
import cocotb
from cocotb.triggers import RisingEdge
@cocotb.test()
async def simple_test(dut):
await RisingEdge(dut.record_signal.field)I have tested this on the latest release version 1.14.1.
Let me know if you need more information, or a way to reproduce, but thanks again for this very cool simulator!
Btw, something unrelated which I ran into while trying to make a small reproduceable is the following:
Note, if you ask cocotb to trigger on the RisingEdge of the signal itself (i.e await RisingEdge(dut.record_signal)), which maybe doesn't make sense at all(?), you get the following backtrace:
*** Caught signal 11 (SEGV_MAPERR) [address=(nil), ip=0x7fd99f665da7] ***
[0x558272ca379d] ../src/util.c:872 signal_handler.lto_priv.0
[0x7fd9988f351f] (/usr/lib/x86_64-linux-gnu/libc.so.6)
[0x7fd99f665da7] (python3.10/site-packages/cocotb/libs/libgpi.so) cocotb/share/lib/gpi/GpiCommon.cpp:589 gpi_deregister_callback
[0x7fd9956fabfc] (python3.10/site-packages/cocotb/simulator.cpython-310-x86_64-linux-gnu.so) cocotb/share/lib/simulator/simulatormodule.cpp:835 _ZL10deregisterPN12_GLOBAL__N_114gpi_hdl_ObjectIP8GpiCbHdlEEP7_object
[0x7fd992f13bd9] (/usr/lib/x86_64-linux-gnu/libpython3.10.so.1.0)
[0x7fd992ea2efd] (/usr/lib/x86_64-linux-gnu/libpython3.10.so.1.0) _PyEval_EvalFrameDefault
[0x7fd992feb3ae] (/usr/lib/x86_64-linux-gnu/libpython3.10.so.1.0)
[0x7fd992ea2efd] (/usr/lib/x86_64-linux-gnu/libpython3.10.so.1.0) _PyEval_EvalFrameDefault
[0x7fd992feb3ae] (/usr/lib/x86_64-linux-gnu/libpython3.10.so.1.0)
[0x7fd992ea2efd] (/usr/lib/x86_64-linux-gnu/libpython3.10.so.1.0) _PyEval_EvalFrameDefault
[0x7fd992feb3ae] (/usr/lib/x86_64-linux-gnu/libpython3.10.so.1.0)
[0x7fd992ea2efd] (/usr/lib/x86_64-linux-gnu/libpython3.10.so.1.0) _PyEval_EvalFrameDefault
[0x7fd992feb3ae] (/usr/lib/x86_64-linux-gnu/libpython3.10.so.1.0)
[0x7fd992ea2efd] (/usr/lib/x86_64-linux-gnu/libpython3.10.so.1.0) _PyEval_EvalFrameDefault
[0x7fd992feb3ae] (/usr/lib/x86_64-linux-gnu/libpython3.10.so.1.0)
[0x7fd992f0b552] (/usr/lib/x86_64-linux-gnu/libpython3.10.so.1.0)
[0x7fd992f0bed0] (/usr/lib/x86_64-linux-gnu/libpython3.10.so.1.0) PyObject_CallFunction
[0x7fd9957380f6] (python3.10/site-packages/cocotb/libs/libcocotb.so) cocotb/share/lib/embed/gpi_embed.cpp:326 _embed_sim_event
[0x7fd9957380f6] (python3.10/site-packages/cocotb/libs/libcocotb.so) cocotb/share/lib/embed/gpi_embed.cpp:314 _embed_sim_event
[0x7fd99f6655ff] (python3.10/site-packages/cocotb/libs/libgpi.so) cocotb/share/lib/gpi/GpiCommon.cpp:127 _Z13gpi_embed_endv
[0x7fd9956d1060] (python3.10/site-packages/cocotb/libs/libcocotbvhpi_nvc.so) _ZTv0_n40_N17VhpiShutdownCbHdl12run_callbackEv
[0x7fd9956d15dd] (python3.10/site-packages/cocotb/libs/libcocotbvhpi_nvc.so) cocotb/share/lib/vhpi/VhpiImpl.cpp:1034 handle_vhpi_callback
[0x558272db5d20] ../src/vhpi/vhpi-model.c:1553 vhpi_global_cb
[0x558272c9fc82] ../src/rt/model.c:432 model_run
[0x558272c9fc82] ../src/rt/model.c:857 run_cmd
[0x558272c9af44] ../src/nvc.c:2117 process_command
[0x558272c9e169] ../src/nvc.c:533 elaborate
[0x558272c9ae99] ../src/nvc.c:2115 process_command
[0x558272c96e16] ../src/nvc.c:2257 main
nvc 1.14.1 (Using LLVM 14.0.0) [x86_64-pc-linux-gnu]