/// <summary>
/// executes the script until it finishes, fails or hits a breakpoint
/// </summary>
public DebuggerState Run()
{
do
{
lastState = Step();
} while (lastState.state == DebuggerState.State.Running);
return(lastState);
}
public void Reset(byte[] inputScript, ABI ABI, string methodName)
{
if (ContractByteCode == null || ContractByteCode.Length == 0)
{
throw new Exception("Contract bytecode is not set yet!");
}
if (lastState.state == DebuggerState.State.Reset)
{
return;
}
if (currentTransaction == null)
{
//throw new Exception("Transaction not set");
currentTransaction = new API.Transaction(this.blockchain.currentBlock);
}
usedGas = 0;
usedOpcodeCount = 0;
currentTransaction.emulator = this;
engine = new ExecutionEngine(currentTransaction, null, interop);
engine.LoadScript(ContractByteCode);
engine.LoadScript(inputScript);
this.currentMethod = methodName;
/*foreach (var output in currentTransaction.outputs)
* {
* if (output.hash == this.currentHash)
* {
* output.hash = engine.CurrentContext.ScriptHash;
* }
* }*/
foreach (var pos in _breakpoints)
{
engine.AddBreakPoint((uint)pos);
}
//engine.Reset();
lastState = new DebuggerState(DebuggerState.State.Reset, 0);
currentTransaction = null;
_variables.Clear();
this._ABI = ABI;
}
/// <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);
}
public void Reset(DataNode inputs, ABI ABI)
{
if (contractByteCode == null || contractByteCode.Length == 0)
{
throw new Exception("Contract bytecode is not set yet!");
}
if (lastState.state == DebuggerState.State.Reset)
{
return;
}
if (currentTransaction == null)
{
//throw new Exception("Transaction not set");
currentTransaction = new Transaction(this.blockchain.currentBlock);
}
usedGas = 0;
usedOpcodeCount = 0;
currentTransaction.emulator = this;
engine = new ExecutionEngine(currentTransaction, Crypto.Default, null, interop);
engine.LoadScript(contractByteCode);
foreach (var output in currentTransaction.outputs)
{
if (output.hash == this.currentHash)
{
output.hash = new UInt160(engine.CurrentContext.ScriptHash);
}
}
foreach (var pos in _breakpoints)
{
engine.AddBreakPoint((uint)pos);
}
using (ScriptBuilder sb = new ScriptBuilder())
{
var items = new Stack <object>();
if (inputs != null)
{
foreach (var item in inputs.Children)
{
var obj = Emulator.ConvertArgument(item);
items.Push(obj);
}
}
while (items.Count > 0)
{
var item = items.Pop();
EmitObject(sb, item);
}
var loaderScript = sb.ToArray();
//System.IO.File.WriteAllBytes("loader.avm", loaderScript);
engine.LoadScript(loaderScript);
}
//engine.Reset();
lastState = new DebuggerState(DebuggerState.State.Reset, 0);
currentTransaction = null;
_variables.Clear();
this._ABI = ABI;
}