bool TryGetNativeCodeCore(DmdMethodBase method, out DbgDotNetNativeCode nativeCode)
{
Dispatcher.VerifyAccess();
nativeCode = default;
if (!engine.IsPaused)
{
return(false);
}
var dbgModule = method.Module.GetDebuggerModule();
if (dbgModule == null)
{
return(false);
}
if (!engine.TryGetDnModule(dbgModule, out var dnModule))
{
return(false);
}
var func = dnModule.CorModule.GetFunctionFromToken((uint)method.MetadataToken);
if (func == null)
{
return(false);
}
var code = func.NativeCode;
if (code == null)
{
return(false);
}
return(TryGetNativeCodeCore(code, method, out nativeCode));
}
bool TryGetNativeCodeCore(ILDbgEngineStackFrame ilFrame, out DbgDotNetNativeCode nativeCode)
{
Dispatcher.VerifyAccess();
if (!engine.IsPaused)
{
nativeCode = default;
return(false);
}
var code = ilFrame.CorFrame.Code;
ilFrame.GetFrameMethodInfo(out var module, out var methodMetadataToken, out var genericTypeArguments, out var genericMethodArguments);
var reflectionMethod = TryGetMethod(module, methodMetadataToken, genericTypeArguments, genericMethodArguments);
return(TryGetNativeCodeCore(code, reflectionMethod, out nativeCode));
}
public bool TryGetNativeCode(DmdMethodBase method, out DbgDotNetNativeCode nativeCode)
{
if (Dispatcher.CheckAccess())
{
return(TryGetNativeCodeCore(method, out nativeCode));
}
return(TryGetNativeCode2(method, out nativeCode));
bool TryGetNativeCode2(DmdMethodBase method2, out DbgDotNetNativeCode nativeCode2)
{
DbgDotNetNativeCode nativeCodeTmp = default;
bool res = Dispatcher.InvokeRethrow(() => TryGetNativeCodeCore(method2, out nativeCodeTmp));
nativeCode2 = nativeCodeTmp;
return(res);
}
}
public bool TryGetNativeCode(DbgStackFrame frame, out DbgDotNetNativeCode nativeCode)
{
if (!ILDbgEngineStackFrame.TryGetEngineStackFrame(frame, out var ilFrame))
{
nativeCode = default;
return(false);
}
if (Dispatcher.CheckAccess())
{
return(TryGetNativeCodeCore(ilFrame, out nativeCode));
}
return(TryGetNativeCode2(ilFrame, out nativeCode));
bool TryGetNativeCode2(ILDbgEngineStackFrame ilFrame2, out DbgDotNetNativeCode nativeCode2)
{
DbgDotNetNativeCode nativeCodeTmp = default;
bool res = Dispatcher.InvokeRethrow(() => TryGetNativeCodeCore(ilFrame2, out nativeCodeTmp));
nativeCode2 = nativeCodeTmp;
return(res);
}
}
bool TryGetNativeCodeCore(CorCode code, DmdMethodBase reflectionMethod, out DbgDotNetNativeCode nativeCode)
{
nativeCode = default;
if (code == null)
{
return(false);
}
var process = code.Function?.Module?.Process;
if (process == null)
{
return(false);
}
// The returned chunks are sorted
var chunks = code.GetCodeChunks();
if (chunks.Length == 0)
{
return(false);
}
int totalLen = 0;
foreach (var chunk in chunks)
{
totalLen += (int)chunk.Length;
}
var allCodeBytes = new byte[totalLen];
int currentPos = 0;
foreach (var chunk in chunks)
{
int hr = process.ReadMemory(chunk.StartAddr, allCodeBytes, currentPos, (int)chunk.Length, out int sizeRead);
if (hr < 0 || sizeRead != (int)chunk.Length)
{
return(false);
}
currentPos += (int)chunk.Length;
}
Debug.Assert(currentPos == totalLen);
// We must get IL to native mappings before we get var homes, or the var
// homes array will be empty.
var map = code.GetILToNativeMapping();
var varHomes = code.GetVariables();
Array.Sort(varHomes, (a, b) => {
int c = a.StartOffset.CompareTo(b.StartOffset);
if (c != 0)
{
return(c);
}
return(a.Length.CompareTo(b.Length));
});
for (int i = 0, chunkIndex = 0, chunkOffset = 0; i < varHomes.Length; i++)
{
var startOffset = varHomes[i].StartOffset;
while (chunkIndex < chunks.Length)
{
if (startOffset < (uint)chunkOffset + chunks[chunkIndex].Length)
{
break;
}
chunkOffset += (int)chunks[chunkIndex].Length;
chunkIndex++;
}
Debug.Assert(chunkIndex < chunks.Length);
if (chunkIndex >= chunks.Length)
{
varHomes = Array.Empty <VariableHome>();
break;
}
varHomes[i].StartOffset += chunks[chunkIndex].StartAddr - (uint)chunkOffset;
}
Array.Sort(varHomes, (a, b) => {
int c = a.SlotIndex.CompareTo(b.SlotIndex);
if (c != 0)
{
return(c);
}
c = a.ArgumentIndex.CompareTo(b.ArgumentIndex);
if (c != 0)
{
return(c);
}
c = a.StartOffset.CompareTo(b.StartOffset);
if (c != 0)
{
return(c);
}
return(a.Length.CompareTo(b.Length));
});
Array.Sort(map, (a, b) => {
int c = a.nativeStartOffset.CompareTo(b.nativeStartOffset);
if (c != 0)
{
return(c);
}
return(a.nativeEndOffset.CompareTo(b.nativeEndOffset));
});
totalLen = 0;
for (int i = 0; i < chunks.Length; i++)
{
chunks[i].StartAddr -= (uint)totalLen;
totalLen += (int)chunks[i].Length;
}
var blocks = new DbgDotNetNativeCodeBlock[map.Length];
ulong baseAddress = chunks[0].StartAddr;
uint chunkByteOffset = 0;
for (int i = 0, chunkIndex = 0; i < blocks.Length; i++)
{
var info = map[i];
bool b = info.nativeEndOffset <= (uint)allCodeBytes.Length && info.nativeStartOffset <= info.nativeEndOffset && chunkIndex < chunks.Length;
Debug.Assert(b);
if (!b)
{
return(false);
}
int codeLen = (int)(info.nativeEndOffset - info.nativeStartOffset);
var rawCode = new ArraySegment <byte>(allCodeBytes, (int)info.nativeStartOffset, codeLen);
ulong address = baseAddress + info.nativeStartOffset;
if ((CorDebugIlToNativeMappingTypes)info.ilOffset == CorDebugIlToNativeMappingTypes.NO_MAPPING)
{
blocks[i] = new DbgDotNetNativeCodeBlock(NativeCodeBlockKind.Unknown, address, rawCode, -1);
}
else if ((CorDebugIlToNativeMappingTypes)info.ilOffset == CorDebugIlToNativeMappingTypes.PROLOG)
{
blocks[i] = new DbgDotNetNativeCodeBlock(NativeCodeBlockKind.Prolog, address, rawCode, -1);
}
else if ((CorDebugIlToNativeMappingTypes)info.ilOffset == CorDebugIlToNativeMappingTypes.EPILOG)
{
blocks[i] = new DbgDotNetNativeCodeBlock(NativeCodeBlockKind.Epilog, address, rawCode, -1);
}
else
{
blocks[i] = new DbgDotNetNativeCodeBlock(NativeCodeBlockKind.Code, address, rawCode, (int)info.ilOffset);
}
chunkByteOffset += (uint)codeLen;
for (;;)
{
if (chunkIndex >= chunks.Length)
{
if (i + 1 == blocks.Length)
{
break;
}
Debug.Assert(false);
return(false);
}
if (chunkByteOffset < chunks[chunkIndex].Length)
{
break;
}
chunkByteOffset -= chunks[chunkIndex].Length;
chunkIndex++;
if (chunkIndex < chunks.Length)
{
baseAddress = chunks[chunkIndex].StartAddr;
}
}
}
NativeCodeOptimization optimization;
switch (code.CompilerFlags)
{
case CorDebugJITCompilerFlags.CORDEBUG_JIT_DEFAULT:
optimization = NativeCodeOptimization.Optimized;
break;
case CorDebugJITCompilerFlags.CORDEBUG_JIT_DISABLE_OPTIMIZATION:
case CorDebugJITCompilerFlags.CORDEBUG_JIT_ENABLE_ENC:
optimization = NativeCodeOptimization.Unoptimized;
break;
default:
Debug.Fail($"Unknown optimization: {code.CompilerFlags}");
optimization = NativeCodeOptimization.Unknown;
break;
}
NativeCodeInfo codeInfo = null;
NativeCodeKind codeKind;
switch (Runtime.Process.Machine)
{
case DbgMachine.X64:
case DbgMachine.X86:
codeKind = Runtime.Process.Machine == DbgMachine.X86 ? NativeCodeKind.X86_32 : NativeCodeKind.X86_64;
var x86Variables = CreateVariablesX86(varHomes) ?? Array.Empty <X86Variable>();
if (x86Variables.Length != 0)
{
codeInfo = new X86NativeCodeInfo(x86Variables);
}
break;
case DbgMachine.Arm:
codeKind = NativeCodeKind.Arm;
Debug.Fail("Create variables like x86/x64 code above");
break;
case DbgMachine.Arm64:
codeKind = NativeCodeKind.Arm64;
Debug.Fail("Create variables like x86/x64 code above");
break;
default:
Debug.Fail($"Unsupported machine: {Runtime.Process.Machine}");
return(false);
}
var methodName = reflectionMethod?.ToString();
nativeCode = new DbgDotNetNativeCode(codeKind, optimization, blocks, codeInfo, methodName);
return(true);
}
