/// <summary>
/// executes a single instruction in the current script, and returns the last script offset
/// </summary>
public DebuggerState Step()
{
if (lastState.state == DebuggerState.State.Finished || lastState.state == DebuggerState.State.Invalid)
{
return(lastState);
}
ExecuteSingleStep();
try
{
lastOffset = engine.CurrentContext.InstructionPointer;
var opcode = engine.lastOpcode;
decimal opCost;
if (opcode <= OpCode.PUSH16)
{
opCost = 0;
}
else
{
switch (opcode)
{
case OpCode.SYSCALL:
{
var callInfo = interop.FindCall(engine.lastSysCall);
opCost = (callInfo != null) ? callInfo.gasCost : 0;
if (engine.lastSysCall.EndsWith("Storage.Put"))
{
opCost *= (Storage.lastStorageLength / 1024.0m);
if (opCost < 1)
{
opCost = 1;
}
}
break;
}
case OpCode.CHECKMULTISIG:
case OpCode.CHECKSIG: opCost = 0.1m; break;
case OpCode.APPCALL:
case OpCode.TAILCALL:
case OpCode.SHA256:
case OpCode.SHA1: opCost = 0.01m; break;
case OpCode.HASH256:
case OpCode.HASH160: opCost = 0.02m; break;
case OpCode.NOP: opCost = 0; break;
default: opCost = 0.001m; break;
}
}
usedGas += opCost;
usedOpcodeCount++;
OnStep?.Invoke(new EmulatorStepInfo()
{
byteCode = engine.CurrentContext.Script, offset = engine.CurrentContext.InstructionPointer, opcode = opcode, gasCost = opCost, sysCall = opcode == OpCode.SYSCALL? engine.lastSysCall : null
});
}
catch
{
// failed to get instruction pointer
}
if (engine.State.HasFlag(VMState.FAULT))
{
lastState = new DebuggerState(DebuggerState.State.Exception, lastOffset);
return(lastState);
}
if (engine.State.HasFlag(VMState.BREAK))
{
lastState = new DebuggerState(DebuggerState.State.Break, lastOffset);
engine.State = VMState.NONE;
return(lastState);
}
if (engine.State.HasFlag(VMState.HALT))
{
lastState = new DebuggerState(DebuggerState.State.Finished, lastOffset);
return(lastState);
}
lastState = new DebuggerState(DebuggerState.State.Running, lastOffset);
return(lastState);
}
/// <summary>
/// executes a single instruction in the current script, and returns the last script offset
/// </summary>
public DebuggerState Step()
{
if (lastState.state == DebuggerState.State.Finished || lastState.state == DebuggerState.State.Invalid)
{
return(lastState);
}
engine.ExecuteSingleStep();
try
{
lastOffset = engine.CurrentContext.InstructionPointer;
var opcode = engine.lastOpcode;
double opCost;
if (opcode <= OpCode.PUSH16)
{
opCost = 0;
}
else
{
switch (opcode)
{
case OpCode.SYSCALL:
{
var callInfo = interop.FindCall(engine.lastSysCall);
opCost = (callInfo != null) ? callInfo.gasCost : 0;
if (engine.lastSysCall.EndsWith("Storage.Put"))
{
opCost *= (Storage.lastStorageLength / 1024.0);
}
break;
}
case OpCode.CHECKMULTISIG:
case OpCode.CHECKSIG: opCost = 0.1; break;
case OpCode.APPCALL:
case OpCode.TAILCALL:
case OpCode.SHA256:
case OpCode.SHA1: opCost = 0.01; break;
case OpCode.HASH256:
case OpCode.HASH160: opCost = 0.02; break;
case OpCode.NOP: opCost = 0; break;
default: opCost = 0.001; break;
}
}
_usedGas += opCost;
}
catch
{
// failed to get instruction pointer
}
if (engine.State.HasFlag(VMState.FAULT))
{
lastState = new DebuggerState(DebuggerState.State.Exception, lastOffset);
return(lastState);
}
if (engine.State.HasFlag(VMState.BREAK))
{
lastState = new DebuggerState(DebuggerState.State.Break, lastOffset);
return(lastState);
}
if (engine.State.HasFlag(VMState.HALT))
{
lastState = new DebuggerState(DebuggerState.State.Finished, lastOffset);
return(lastState);
}
lastState = new DebuggerState(DebuggerState.State.Running, lastOffset);
return(lastState);
}
