pyrenode3 crashes when creating an Action`2 and passing it to SetHook

[jwise]

I'm trying to get a hook attached through to pyrenode3 like I would in a resc file:

sysbus.cpu0 AddHook 0x8001d7c """
us = cpu.GetRegister(0).RawValue
print 'skipping delay of {} us'.format(us)
cpu.SetRegister(0, Antmicro.Renode.Peripherals.CPU.RegisterValue.Create(0, 32))
"""

But creating an Action by hand and passing it to AddHook causes pyrenode3 to crash anyway:

>>> def hook(cpu: "Antmicro.Renode.Peripherals.CPU.ICpuSupportingGdb", what: "System.UInt64") -> "UInt64":
...     print("fired!")
...     return 0
...
>>> import System
>>> import Antmicro.Renode.Peripherals.CPU
>>> getattr(System, "Action`2")[Antmicro.Renode.Peripherals.CPU.ICpuSupportingGdb, System.UInt64]
<class 'System.Action[ICpuSupportingGdb,UInt64]'>
>>> action = getattr(System, "Action`2")[Antmicro.Renode.Peripherals.CPU.ICpuSupportingGdb, System.UInt64](hook)
>>> ams.sysbus.cpu0.AddHook(0x8001d7c, action)
>>> e.StartAll()
Unhandled Exception:
Python.Runtime.PythonException: Cannot switch to a different thread
	Current:  <greenlet.greenlet object at 0x70399ad8b880 (otid=0x7039a6152c10) current active started main>
	Expected: <greenlet.greenlet object at 0x7039d7a9bd40 (otid=0x7039d7af2310) suspended active started main>
  at Python.Runtime.PythonException.ThrowLastAsClrException () [0x00025] in <4c57922ba7ce4753a801bba125b62f75>:0 
  at Python.Runtime.Dispatcher.TrueDispatch (System.Object[] args) [0x000ad] in <4c57922ba7ce4753a801bba125b62f75>:0 
  at Python.Runtime.Dispatcher.Dispatch (System.Object[] args) [0x00006] in <4c57922ba7ce4753a801bba125b62f75>:0 
  at __System_Action`2\[\[Antmicro_Renode_Peripherals_CPU_ICpuSupportingGdb\, Emulator\, Version=0_0_0_0\, Culture=neutral\, PublicKeyToken=null\]\,\[System_UInt64\, mscorlib\, Version=4_0_0_0\, Culture=neutral\, PublicKeyToken=b77a5c561934e089\]\]Dispatcher.Invoke (Antmicro.Renode.Peripherals.CPU.ICpuSupportingGdb , System.UInt64 ) [0x00022] in <3b6ae4eb72634353b0d26b4f0a61ee6e>:0 
  at Antmicro.Renode.Peripherals.CPU.TranslationCPU+HookDescriptor.ExecuteCallbacks () [0x0001a] in <efd51307fbcb4e0ab3e763837222423d>:0 
  at Antmicro.Renode.Peripherals.CPU.TranslationCPU.ExecuteHooks (System.UInt64 address) [0x00034] in <efd51307fbcb4e0ab3e763837222423d>:0 
  at Antmicro.Renode.Peripherals.CPU.TranslationCPU.ExecutionFinished (Antmicro.Renode.Peripherals.CPU.ExecutionResult result) [0x00011] in <efd51307fbcb4e0ab3e763837222423d>:0 
  at Antmicro.Renode.Peripherals.CPU.BaseCPU.CpuThreadBodyInner (System.Boolean singleStep) [0x00135] in <efd51307fbcb4e0ab3e763837222423d>:0 
  at Antmicro.Renode.Peripherals.CPU.BaseCPU.CpuThreadBody () [0x00155] in <efd51307fbcb4e0ab3e763837222423d>:0 
  at System.Threading.ThreadHelper.ThreadStart_Context (System.Object state) [0x00017] in <12b418a7818c4ca0893feeaaf67f1e7f>:0 
  at System.Threading.ExecutionContext.RunInternal (System.Threading.ExecutionContext executionContext, System.Threading.ContextCallback callback, System.Object state, System.Boolean preserveSyncCtx) [0x0008d] in <12b418a7818c4ca0893feeaaf67f1e7f>:0 
  at System.Threading.ExecutionContext.Run (System.Threading.ExecutionContext executionContext, System.Threading.ContextCallback callback, System.Object state, System.Boolean preserveSyncCtx) [0x00000] in <12b418a7818c4ca0893feeaaf67f1e7f>:0 
  at System.Threading.ExecutionContext.Run (System.Threading.ExecutionContext executionContext, System.Threading.ContextCallback callback, System.Object state) [0x00031] in <12b418a7818c4ca0893feeaaf67f1e7f>:0 
  at System.Threading.ThreadHelper.ThreadStart () [0x0000b] in <12b418a7818c4ca0893feeaaf67f1e7f>:0

Is there a known correct way to create a hook that calls into pyrenode3?

[sean-anderson-seco]

See also #15. I have a working implementation of the strategy I describe at the bottom of that issue. I am going to work on upstreaming it in the next few months, but it is low-priority for me right now.