public TraceManager(DkmProcess process)
{
_process = process;
_pyrtInfo = process.GetPythonRuntimeInfo();
_breakpointData = _pyrtInfo.DLLs.DebuggerHelper.GetExportedStaticVariable <ArrayProxy <CliStructProxy <BreakpointData> > >("breakpointData");
_currentBreakpointData = _pyrtInfo.DLLs.DebuggerHelper.GetExportedStaticVariable <ByteProxy>("currentBreakpointData");
_breakpointDataInUseByTraceFunc = _pyrtInfo.DLLs.DebuggerHelper.GetExportedStaticVariable <ByteProxy>("breakpointDataInUseByTraceFunc");
_currentSourceLocation = _pyrtInfo.DLLs.DebuggerHelper.GetExportedStaticVariable <CliStructProxy <CurrentSourceLocation> >("currentSourceLocation");
_stepKind = _pyrtInfo.DLLs.DebuggerHelper.GetExportedStaticVariable <Int32Proxy>("stepKind");
_stepThreadId = _pyrtInfo.DLLs.DebuggerHelper.GetExportedStaticVariable <UInt64Proxy>("stepThreadId");
_steppingStackDepth = _pyrtInfo.DLLs.DebuggerHelper.GetExportedStaticVariable <Int32Proxy>("steppingStackDepth");
var onBreakpointHit = _pyrtInfo.DLLs.DebuggerHelper.FindExportName("OnBreakpointHit", true);
_onBreakpointHitBP = DkmRuntimeInstructionBreakpoint.Create(Guids.PythonTraceManagerSourceGuid, null, onBreakpointHit, false, null);
_onBreakpointHitBP.Enable();
var onStepComplete = _pyrtInfo.DLLs.DebuggerHelper.FindExportName("OnStepComplete", true);
_onStepCompleteBP = DkmRuntimeInstructionBreakpoint.Create(Guids.PythonTraceManagerSourceGuid, null, onStepComplete, false, null);
_onStepCompleteBP.Enable();
var onStepFallThrough = _pyrtInfo.DLLs.DebuggerHelper.FindExportName("OnStepFallThrough", true);
_onStepFallThroughBP = DkmRuntimeInstructionBreakpoint.Create(Guids.PythonTraceManagerSourceGuid, null, onStepFallThrough, false, null);
_onStepFallThroughBP.Enable();
WriteBreakpoints();
}
void IFunctionTracer.OnEntryBreakpointHit(DkmRuntimeBreakpoint bp, DkmThread thread, bool hasException)
{
// The function was just entered. Install the exit breakpoint on the calling thread at the
// return address, and notify any listeners.
DkmStackWalkFrame frame = thread.GetTopStackWalkFrame(bp.RuntimeInstance);
bool suppressExitBreakpoint = false;
if (OnFunctionEntered != null)
{
OnFunctionEntered(frame, frameAnalyzer, out suppressExitBreakpoint);
}
if (!suppressExitBreakpoint)
{
ulong ret = frame.VscxGetReturnAddress();
DkmInstructionAddress retAddr = thread.Process.CreateNativeInstructionAddress(ret);
DkmRuntimeInstructionBreakpoint exitBp = DkmRuntimeInstructionBreakpoint.Create(
Guids.Source.FunctionTraceExit, thread, retAddr, false, null);
// Capture the value of every argument now, since when the exit breakpoint gets hit, the
// target function will have already returned and its frame will be cleaned up.
exitBp.SetDataItem(DkmDataCreationDisposition.CreateAlways,
new FunctionTraceEntryDataItem {
EntryArgumentValues = frameAnalyzer.GetAllArgumentValues(frame)
});
exitBp.SetDataItem(DkmDataCreationDisposition.CreateAlways,
new FunctionTraceDataItem {
Tracer = this
});
exitBp.Enable();
}
}
DkmRuntimeInstructionBreakpoint PlaceBreakpointAtAddress(NullcRemoteProcessDataItem processData, DkmThread thread, ulong instructionAddress)
{
var dkmInstruction = DkmNativeInstructionAddress.Create(processData.nativeRuntimeInstance, processData.nativeModuleInstance, (uint)(instructionAddress - processData.nativeModuleInstance.BaseAddress), new DkmInstructionAddress.CPUInstruction(instructionAddress));
var stepBreakpoint = DkmRuntimeInstructionBreakpoint.Create(DebugHelpers.NullcStepperBreakpointSourceId, thread, dkmInstruction, false, null);
stepBreakpoint.Enable();
return(stepBreakpoint);
}
public void Enable()
{
DkmNativeModuleInstance module = entryAddress.ModuleInstance;
FunctionTraceDataItem traceDataItem = new FunctionTraceDataItem {
Tracer = this
};
entryBp = DkmRuntimeInstructionBreakpoint.Create(
Guids.Source.FunctionTraceEnter, null, entryAddress, false, null);
entryBp.SetDataItem(DkmDataCreationDisposition.CreateAlways, traceDataItem);
entryBp.Enable();
}
public static DkmRuntimeBreakpoint CreateRuntimeDllExportedFunctionBreakpoint(DkmNativeModuleInstance moduleInstance, string funcName, RuntimeDllBreakpointHandler handler, bool enable = false)
{
var process = moduleInstance.Process;
var runtimeBreakpoints = process.GetOrCreateDataItem(() => new RuntimeDllBreakpoints());
var addr = moduleInstance.GetExportedFunctionAddress(funcName);
var bp = DkmRuntimeInstructionBreakpoint.Create(Guids.LocalComponentGuid, null, addr, false, null);
if (enable)
{
bp.Enable();
}
runtimeBreakpoints.Handlers.Add(bp.UniqueId, handler);
return(bp);
}
internal static Guid?CreateTargetFunctionBreakpointAtAddress(DkmProcess process, DkmNativeModuleInstance moduleWithLoadedLua, string name, string desc, ulong address)
{
if (address != 0)
{
LocalComponent.log.Debug($"Hooking Lua '{desc}' ({name}) function (address 0x{address:x})");
var nativeAddress = process.CreateNativeInstructionAddress(address);
var breakpoint = DkmRuntimeInstructionBreakpoint.Create(Guids.luaSupportBreakpointGuid, null, nativeAddress, false, null);
breakpoint.Enable();
return(breakpoint.UniqueId);
}
else
{
LocalComponent.log.Warning($"Failed to create breakpoint in '{name}' with missing address");
}
return(null);
}
internal static Guid?CreateHelperFunctionBreakpoint(DkmNativeModuleInstance nativeModuleInstance, string functionName)
{
var functionAddress = TryGetFunctionAddressAtDebugStart(nativeModuleInstance, functionName, out string error);
if (functionAddress != null)
{
LocalComponent.log.Debug($"Creating breakpoint in '{functionName}'");
var nativeAddress = nativeModuleInstance.Process.CreateNativeInstructionAddress(functionAddress.Value);
var breakpoint = DkmRuntimeInstructionBreakpoint.Create(Guids.luaSupportBreakpointGuid, null, nativeAddress, false, null);
breakpoint.Enable();
return(breakpoint.UniqueId);
}
else
{
var nativeFunctionAddress = FindFunctionAddress(nativeModuleInstance, functionName);
if (nativeFunctionAddress != 0)
{
LocalComponent.log.Debug($"Creating 'native' breakpoint in '{functionName}'");
var nativeAddress = nativeModuleInstance.Process.CreateNativeInstructionAddress(nativeFunctionAddress);
var breakpoint = DkmRuntimeInstructionBreakpoint.Create(Guids.luaSupportBreakpointGuid, null, nativeAddress, false, null);
breakpoint.Enable();
return(breakpoint.UniqueId);
}
else
{
LocalComponent.log.Warning($"Failed to create breakpoint in '{functionName}' with {error}");
}
}
return(null);
}
public void OnBeginStepOut(DkmThread thread)
{
// When we're stepping out while in Python code, there are two possibilities. Either the stack looks like this:
//
// PythonFrame1
// PythonFrame2
//
// or else it looks like this:
//
// PythonFrame
// [Native to Python transition]
// NativeFrame
//
// In both cases, we use native breakpoints on the return address to catch the end of step-out operation.
// For Python-to-native step-out, this is the only option. For Python-to-Python, it would seem that TraceFunc
// can detect it via PyTrace_RETURN, but it doesn't actually know whether the return is to Python or to
// native at the point where it's reported - and, in any case, we need to let PyEval_EvalFrameEx to return
// before reporting the completion of that step-out (otherwise we will show the returning frame in call stack).
// Find the destination for step-out by walking the call stack and finding either the first native frame
// outside of Python and helper DLLs, or the second Python frame.
var inspectionSession = DkmInspectionSession.Create(_process, null);
var frameFormatOptions = new DkmFrameFormatOptions(DkmVariableInfoFlags.None, DkmFrameNameFormatOptions.None, DkmEvaluationFlags.None, 10000, 10);
var stackContext = DkmStackContext.Create(inspectionSession, thread, DkmCallStackFilterOptions.None, frameFormatOptions, null, null);
DkmStackFrame frame = null;
for (int pyFrameCount = 0; pyFrameCount != 2;)
{
DkmStackFrame[] frames = null;
var workList = DkmWorkList.Create(null);
stackContext.GetNextFrames(workList, 1, (result) => { frames = result.Frames; });
workList.Execute();
if (frames == null || frames.Length != 1)
{
return;
}
frame = frames[0];
var frameModuleInstance = frame.ModuleInstance;
if (frameModuleInstance is DkmNativeModuleInstance &&
frameModuleInstance != _pyrtInfo.DLLs.Python &&
frameModuleInstance != _pyrtInfo.DLLs.DebuggerHelper &&
frameModuleInstance != _pyrtInfo.DLLs.CTypes)
{
break;
}
else if (frame.RuntimeInstance != null && frame.RuntimeInstance.Id.RuntimeType == Guids.PythonRuntimeTypeGuid)
{
++pyFrameCount;
}
}
var nativeAddr = frame.InstructionAddress as DkmNativeInstructionAddress;
if (nativeAddr == null)
{
var customAddr = frame.InstructionAddress as DkmCustomInstructionAddress;
if (customAddr == null)
{
return;
}
var loc = new SourceLocation(customAddr.AdditionalData, thread.Process);
nativeAddr = loc.NativeAddress;
if (nativeAddr == null)
{
return;
}
}
var bp = DkmRuntimeInstructionBreakpoint.Create(Guids.PythonStepTargetSourceGuid, thread, nativeAddr, false, null);
bp.Enable();
_stepOutTargetBreakpoints.Add(bp);
}
public static DkmRuntimeInstructionBreakpoint CreateBreakpoint(this DkmProcess process, Guid sourceId, ulong address)
{
var iaddr = process.CreateNativeInstructionAddress(address);
return(DkmRuntimeInstructionBreakpoint.Create(sourceId, null, iaddr, false, null));
}