public async Task <SSymbolNameAndDisplacement> LookupSymbolName(ulong pointer)
{
try {
SModule module = await this.debuggerEngine.GetModuleForAddress(pointer);
Dia2Lib.IDiaSession session = await this.debuggerEngine.DiaLoader.LoadDiaSession(module.Name);
if (session != null)
{
// We have a DIA session; use it.
Dia2Lib.IDiaSymbol symbol;
ulong rva = pointer - module.BaseAddress;
session.findSymbolByRVA((uint)rva, Dia2Lib.SymTagEnum.SymTagNull, out symbol);
// Blocks don't have names. Walk up to the nearest non-block parent.
while ((Dia2Lib.SymTagEnum)symbol.symTag == Dia2Lib.SymTagEnum.SymTagBlock)
{
symbol = symbol.lexicalParent;
}
SymTagEnum symTag = (SymTagEnum)symbol.symTag;
string name;
if (symTag == SymTagEnum.SymTagPublicSymbol || symTag == SymTagEnum.SymTagThunk)
{
// Public symbols have decorated names that need to be undecorated (see dbghelp!diaFillSymbolInfo).
symbol.get_undecoratedNameEx(0x1000, out name);
}
else
{
name = symbol.name;
}
return(new SSymbolNameAndDisplacement()
{
Module = module.Name,
Name = name,
Displacement = (ulong)(rva - symbol.relativeVirtualAddress)
});
}
else
{
return(await this.debuggerEngine.LookupSymbolName(pointer));
}
} catch {
throw new DebuggerException(String.Format("Invalid symbol address: 0x{0:x8}", pointer));
}
}
public async Task <IEnumerable <SNamedSymbol> > GetSymbolsInStackFrame(ulong instructionAddress, ulong stackAddress, ulong frameAddress)
{
List <SNamedSymbol> results = new List <SNamedSymbol>();
SModule module = await this.debuggerEngine.GetModuleForAddress(instructionAddress);
Dia2Lib.IDiaSession session = await this.debuggerEngine.DiaLoader.LoadDiaSession(module.Name);
if (session == null)
{
throw new DebuggerException("Loading stack frame symbols directly from the debugger is not supported.");
}
Dia2Lib.IDiaSymbol symbol;
uint rva = (uint)(instructionAddress - module.BaseAddress);
try {
session.findSymbolByRVA(rva, Dia2Lib.SymTagEnum.SymTagNull, out symbol);
} catch {
throw new DebuggerException(string.Format("Invalid symbol address: 0x:{0:x8}", instructionAddress));
}
if ((SymTagEnum)symbol.symTag == SymTagEnum.SymTagFunction || (SymTagEnum)symbol.symTag == SymTagEnum.SymTagBlock)
{
do
{
IDiaEnumSymbols symbols = null;
symbol.findChildrenExByRVA(SymTagEnum.SymTagData, null, (uint)DiaHelpers.NameSearchOptions.nsNone, rva, out symbols);
foreach (IDiaSymbol localSymbol in symbols)
{
DiaHelpers.LocationType location = (DiaHelpers.LocationType)localSymbol.locationType;
if (location == DiaHelpers.LocationType.LocIsRegRel)
{
// Check if the offset is from the stack address or frame address.
DiaHelpers.CV_HREG_e register = (DiaHelpers.CV_HREG_e)localSymbol.registerId;
ulong relativeAddress = 0;
switch (register)
{
case DiaHelpers.CV_HREG_e.CV_AMD64_RSP:
case DiaHelpers.CV_HREG_e.CV_AMD64_ESP: // Also CV_REG_ESP
relativeAddress = stackAddress;
break;
case DiaHelpers.CV_HREG_e.CV_AMD64_RBP:
case DiaHelpers.CV_HREG_e.CV_AMD64_EBP: // Also CV_REG_EBP
case DiaHelpers.CV_HREG_e.CV_ALLREG_VFRAME:
relativeAddress = frameAddress;
break;
default:
// Relative to a register that's not the frame pointer or stack pointer. We don't have support for this yet.
continue;
}
int pointerAdjustment = 0;
if (localSymbol.name == "this")
{
pointerAdjustment = symbol.type.thisAdjust;
}
results.Add(new SNamedSymbol()
{
Symbol = new SSymbolResult()
{
Module = module.Name,
Pointer = (ulong)((long)relativeAddress + localSymbol.offset),
Type = DiaHelpers.GetTypeName(localSymbol.type, pointerAdjustment)
},
Name = localSymbol.name
});
}
}
// If the symbol wasn't a function (e.g. it was a block) keep going until we reach containing function.
} while ((SymTagEnum)symbol.symTag != SymTagEnum.SymTagFunction && ((symbol = symbol.lexicalParent) != null));
}
return(results);
}