private void PushCall(VMModule module, int functionIndex, byte[] argumentData)
{
// TODO: Need either better documentation about how bound functions must not re-retrieve arguments from
// the original argumentSource after a Call Continuation, or we need to use unique argument buffers for each
// bound function call (with pooling of course). I'd opt for the former, it's super easy to just grab your
// arguments as soon as you enter the bound function, and is the cleanest as well.
GetFunctionStackSizes(module, functionIndex,
out int _,
out int argumentMemorySize,
out int stackSize);
if (argumentData.Length != argumentMemorySize)
{
throw new ArgumentOutOfRangeException(nameof(argumentData), "Function argument size differs.");
}
// Function input + space for function index
_argumentBuffer.Recreate(stackSize + sizeof(int));
for (int i = 0, ilen = argumentData.Length; i < ilen; ++i)
{
_argumentBuffer.PushVal(argumentData[i]);
}
_argumentBuffer.PushValInt(functionIndex);
PushCall(module, _argumentBuffer);
}
private void GetFunctionStackSizes(
VMModule module,
int functionIndex,
out int returnValueSize,
out int argumentMemorySize,
out int stackSize)
{
int definedFunctionCount = module.ILModule.DefinedFunctions.Length;
if (functionIndex >= definedFunctionCount)
{
VMFunction function = module.VMFunctions[functionIndex];
returnValueSize = function.ReturnValueSize;
argumentMemorySize = function.ArgumentMemorySize;
stackSize = returnValueSize + argumentMemorySize;
//frame = AcquireFrame(function.ArgumentMemorySize);
//frame.BindingEnumerator = function.Delegate(this, new ArgumentSource(frame.Memory, 0));
}
else
{
ILFunction function = module.ILModule.DefinedFunctions[functionIndex];
returnValueSize = function.ReturnValueSize;
argumentMemorySize = function.ArgumentMemorySize;
stackSize = function.MaxStackSize;
//frame = AcquireFrame(function.MaxStackSize);
}
}
public bool Call(
VMModule module,
string functionName,
byte[] argumentData,
Action <bool>?finished = null)
{
if (IsRunning)
{
throw new InvalidOperationException("Cannot call function while running");
}
int functionIndex = LookupFunction(module.ILModule, functionName);
if (functionIndex == -1)
{
return(false);
}
int argumentsSize;
if (functionIndex < module.ILModule.DefinedFunctions.Length)
{
argumentsSize = module.ILModule.DefinedFunctions[functionIndex].ArgumentMemorySize;
}
else
{
argumentsSize = module.VMFunctions[functionIndex].ArgumentMemorySize;
}
if (argumentData.Length != argumentsSize)
{
// TODO: Should this be an exception? At the very least we need a result code to determine why it failed.
return(false);
}
if (finished == null)
{
finished = success => { };
}
IsRunning = true;
_finishedCallback = finished;
_cycleCount = 0;
PushCall(module, functionIndex, argumentData);
if (_isStepping)
{
Break();
}
else
{
Continue();
}
return(true);
}
public static Continuation Call(VMModule module, int functionIndex, IReadOnlyList <int> arguments)
{
return(new Continuation {
Action = ContinuationAction.CALL,
Module = module,
FunctionIndex = functionIndex,
Arguments = arguments
});
}
public static Continuation Call(VMModule module, string functionName, IReadOnlyList <int> arguments)
{
int index = VirtualMachine.LookupFunction(module.ILModule, functionName);
if (index == -1)
{
throw new ArgumentException($"Function {functionName} not found in given module", nameof(functionName));
}
return(Call(module, index, arguments));
}
private void PushCall(VMModule module, StackFrameMemory sourceStack)
{
int functionIndex = sourceStack.PopValInt();
GetFunctionStackSizes(module, functionIndex,
out int returnValueSize,
out int argumentMemorySize,
out int stackSize);
StackFrame frame = AcquireFrame(stackSize);
frame.Module = module;
frame.Function = functionIndex;
frame.Memory.CopyFrom(sourceStack, sourceStack.StackPointer - argumentMemorySize, returnValueSize, argumentMemorySize);
sourceStack.Discard(argumentMemorySize);
PushCallStack(frame);
// TODO: PERF: Try to optimize out calls to HandleModuleAdded when we can deduce that the module has already
// been seen.
// For calls pushed by the CALL instruction, we know that the module will be the same and that we don't need
// to call this function.
_debugger?.HandleModuleAdded(module);
}