Environment

• Pythonnet version: 3.1.0-preview2023-04-03
• Python version: 3.8.10
• Operating System: Linux (ppc64le/s390x architecture)
• .NET Runtime: net7.0

Details

The delegates declared using NewReference or BorrowedReference structs are not working/crashing on ppc64le architecture as the delegate declaration and C function declaration are not matching. For e.g.:
unsafe internal static delegate* unmanaged[Cdecl]<long, NewReference> PyLong_FromLongLong { get; }

The above delegate does not work because the long value is getting passed in wrong register as NewReference is a struct type but the C function just returns a pointer to PyObject. Following is the C function declaration:
PyObject* PyLong_FromLongLong(long long v)

If we change the above delegate as below then it's works fine.
unsafe internal static delegate* unmanaged[Cdecl]<long, IntPtr> PyLong_FromLongLong { get; }

• Describe what you were trying to get done.

  TODO

• What commands did you run to trigger this issue? If you can provide a
  Minimal, Complete, and Verifiable example
  this will help us understand the issue.

print('TODO')

• If there was a crash, please include the traceback here.

Below is the Traceback:

Thread 1 (Thread 0x7603109c5400 (LWP 919128)):
#0 0x000076031036f318 in __GI___wait4 (pid=, stat_loc=0x7fffe1938990, options=, usage=0x0) at ../sysdeps/unix/sysv/linux/wait4.c:27
#1 0x000076031036f20c in __GI___waitpid (pid=, stat_loc=, options=) at waitpid.c:38
#2 0x0000760310014abc in dump_native_stacktrace (signal=, mctx=) at /root/alhad/Native_Build/runtime/src/mono/mono/mini/mini-posix.c:843
#3 mono_dump_native_crash_info (signal=, mctx=0x7fffe19394a8, info=) at /root/alhad/Native_Build/runtime/src/mono/mono/mini/mini-posix.c:870
#4 0x000076030ffc474c in mono_handle_native_crash (signal=0x7603100f2f5f "SIGSEGV", mctx=0x7fffe19394a8, info=) at /root/alhad/Native_Build/runtime/src/mono/mono/mini/mini-exceptions.c:3005
#5 0x000076030ff0e0a8 in mono_sigsegv_signal_handler_debug (_dummy=11, _info=0x7fffe193a4e8, context=0x7fffe1939770, debug_fault_addr=0xea6100f8ea4100f0) at /root/alhad/Native_Build/runtime/src/mono/mono/mini/mini-runtime.c:3773
#6
#7 _Py_INCREF (op=0xea6100f8ea4100f0) at ../Include/object.h:459
#8 insertdict (mp=mp@entry=0x76030c096590, key=key@entry=0x760305e0d040, hash=-8286388524546298114, value=value@entry=0xea6100f8ea4100f0) at ../Objects/dictobject.c:1034
#9 0x0000760305f34060 in PyDict_SetItem (op=0x76030c096590, key=0x760305e0d040, value=0xea6100f8ea4100f0) at ../Objects/dictobject.c:1545
#10 0x0000760305f390f4 in PyDict_SetItemString (v=0x76030c096590, key=, item=0xea6100f8ea4100f0) at ../Objects/dictobject.c:3417
#11 0x00007603060c5bc0 in PySys_SetObject (name=, v=) at ../Python/sysmodule.c:112
#12 0x000076030f525a14 in ?? ()
#13 0x000076030f524470 in ?? ()
#14 0x000076030f523ca4 in ?? ()
#15 0x000076030f511aac in ?? ()
#16 0x000076030f4dab18 in ?? ()
#17 0x000076030f4da74c in ?? ()
#18 0x000076030f4d7fc0 in ?? ()
#19 0x000076030f4d4b90 in ?? ()
#20 0x000076030f4d7dd0 in ?? ()
#21 0x000076030ff11874 in mono_jit_runtime_invoke (method=0x38e5de557e8, obj=0x0, params=, exc=, error=) at /root/alhad/Native_Build/runtime/src/mono/mono/mini/mini-runtime.c:3570
#22 0x000076030fdeca38 in do_runtime_invoke (method=0x38e5de557e8, obj=, params=0x7fffe193b580, exc=0x0, error=0x7fffe193b628) at /root/alhad/Native_Build/runtime/src/mono/mono/metadata/object.c:2415
#23 mono_runtime_invoke_checked (method=0x38e5de557e8, obj=, params=0x7fffe193b580, error=0x7fffe193b628) at /root/alhad/Native_Build/runtime/src/mono/mono/metadata/object.c:2583
#24 0x000076030fdf63b4 in do_exec_main_checked (method=0x38e5de557e8, args=, error=0x7fffe193b628) at /root/alhad/Native_Build/runtime/src/mono/mono/metadata/object.c:4435
#25 mono_runtime_exec_main_checked (method=, args=, error=) at /root/alhad/Native_Build/runtime/src/mono/mono/metadata/object.c:4541
#26 0x000076030ff76314 in mono_jit_exec_internal (domain=, assembly=, argc=1575548528, argv=) at /root/alhad/Native_Build/runtime/src/mono/mono/mini/driver.c:1365
#27 mono_jit_exec (domain=, assembly=, argc=1575548528, argv=) at /root/alhad/Native_Build/runtime/src/mono/mono/mini/driver.c:1310
#28 0x000076030ff79eb0 in main_thread_handler (user_data=) at /root/alhad/Native_Build/runtime/src/mono/mono/mini/driver.c:1442
#29 mono_main (argc=, argv=) at /root/alhad/Native_Build/runtime/src/mono/mono/mini/driver.c:2647
#30 0x000076030fffd668 in monovm_execute_assembly (argc=0, argv=0x0, managedAssemblyPath=, exitCode=0x7fffe193bdc8) at /root/alhad/Native_Build/runtime/src/mono/mono/mini/monovm.c:268
#31 0x000076030fefdbc8 in coreclr_execute_assembly (hostHandle=, domainId=, argc=, argv=, managedAssemblyPath=, exitCode=) at /root/alhad/Native_Build/runtime/src/mono/mono/mini/main-core.c:89
#32 0x0000760310179aa4 in ?? () from /root/alhad/Native_Build/output/.dotnet/shared/Microsoft.NETCore.App/7.0.4/libhostpolicy.so
#33 0x0000760310188654 in ?? () from /root/alhad/Native_Build/output/.dotnet/shared/Microsoft.NETCore.App/7.0.4/libhostpolicy.so
#34 0x0000760310188b80 in ?? () from /root/alhad/Native_Build/output/.dotnet/shared/Microsoft.NETCore.App/7.0.4/libhostpolicy.so
#35 0x00007603101898fc in corehost_main () from /root/alhad/Native_Build/output/.dotnet/shared/Microsoft.NETCore.App/7.0.4/libhostpolicy.so
#36 0x000076031020385c in ?? () from /root/alhad/Native_Build/output/.dotnet/host/fxr/7.0.4/libhostfxr.so
#37 0x0000760310202310 in ?? () from /root/alhad/Native_Build/output/.dotnet/host/fxr/7.0.4/libhostfxr.so
#38 0x00007603101fdc20 in hostfxr_main_startupinfo () from /root/alhad/Native_Build/output/.dotnet/host/fxr/7.0.4/libhostfxr.so
#39 0x0000038e23a41d68 in ?? ()
#40 0x0000038e23a421b8 in ?? ()
#41 0x0000760310294ccc in generic_start_main (main=0x38e23a420f0, argc=, argv=0x7fffe193cb48, auxvec=0x7fffe193cc18, init=, rtld_fini=, stack_end=, fini=) at ../csu/libc-start.c:308
#42 0x0000760310294ea4 in __libc_start_main (argc=, argv=, ev=, auxvec=, rtld_fini=, stinfo=, stack_on_entry=) at ../sysdeps/unix/sysv/linux/powerpc/libc-start.c:98
#43 0x0000000000000000 in ?? ()
[Inferior 1 (process 919128) detached]

print('TODO')