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Ryujinx/Ryujinx.HLE/HOS/Kernel/HleProcessDebugger.cs

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using ChocolArm64.Memory;
using ChocolArm64.State;
using Ryujinx.Common.Logging;
using Ryujinx.HLE.HOS.Diagnostics.Demangler;
using Ryujinx.HLE.Loaders.Elf;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading;
namespace Ryujinx.HLE.HOS.Kernel
{
class HleProcessDebugger
{
private const int Mod0 = 'M' << 0 | 'O' << 8 | 'D' << 16 | '0' << 24;
private KProcess Owner;
private class Image
{
public long BaseAddress { get; private set; }
public ElfSymbol[] Symbols { get; private set; }
public Image(long BaseAddress, ElfSymbol[] Symbols)
{
this.BaseAddress = BaseAddress;
this.Symbols = Symbols;
}
}
private List<Image> Images;
private int Loaded;
public HleProcessDebugger(KProcess Owner)
{
this.Owner = Owner;
Images = new List<Image>();
}
public void PrintGuestStackTrace(CpuThreadState ThreadState)
{
EnsureLoaded();
StringBuilder Trace = new StringBuilder();
Trace.AppendLine("Guest stack trace:");
void AppendTrace(long Address)
{
Image Image = GetImage(Address, out int ImageIndex);
if (Image == null || !TryGetSubName(Image, Address, out string SubName))
{
SubName = $"Sub{Address:x16}";
}
else if (SubName.StartsWith("_Z"))
{
SubName = Demangler.Parse(SubName);
}
if (Image != null)
{
long Offset = Address - Image.BaseAddress;
string ImageName = GetGuessedNsoNameFromIndex(ImageIndex);
string ImageNameAndOffset = $"[{Owner.Name}] {ImageName}:0x{Offset:x8}";
Trace.AppendLine($" {ImageNameAndOffset} {SubName}");
}
else
{
Trace.AppendLine($" [{Owner.Name}] ??? {SubName}");
}
}
long FramePointer = (long)ThreadState.X29;
while (FramePointer != 0)
{
if ((FramePointer & 7) != 0 ||
!Owner.CpuMemory.IsMapped(FramePointer) ||
!Owner.CpuMemory.IsMapped(FramePointer + 8))
{
break;
}
//Note: This is the return address, we need to subtract one instruction
//worth of bytes to get the branch instruction address.
AppendTrace(Owner.CpuMemory.ReadInt64(FramePointer + 8) - 4);
FramePointer = Owner.CpuMemory.ReadInt64(FramePointer);
}
Logger.PrintInfo(LogClass.Cpu, Trace.ToString());
}
private bool TryGetSubName(Image Image, long Address, out string Name)
{
Address -= Image.BaseAddress;
int Left = 0;
int Right = Image.Symbols.Length - 1;
while (Left <= Right)
{
int Size = Right - Left;
int Middle = Left + (Size >> 1);
ElfSymbol Symbol = Image.Symbols[Middle];
long EndAddr = Symbol.Value + Symbol.Size;
if ((ulong)Address >= (ulong)Symbol.Value && (ulong)Address < (ulong)EndAddr)
{
Name = Symbol.Name;
return true;
}
if ((ulong)Address < (ulong)Symbol.Value)
{
Right = Middle - 1;
}
else
{
Left = Middle + 1;
}
}
Name = null;
return false;
}
private Image GetImage(long Address, out int Index)
{
lock (Images)
{
for (Index = Images.Count - 1; Index >= 0; Index--)
{
if ((ulong)Address >= (ulong)Images[Index].BaseAddress)
{
return Images[Index];
}
}
}
return null;
}
private string GetGuessedNsoNameFromIndex(int Index)
{
if ((uint)Index > 11)
{
return "???";
}
if (Index == 0)
{
return "rtld";
}
else if (Index == 1)
{
return "main";
}
else if (Index == GetImagesCount() - 1)
{
return "sdk";
}
else
{
return "subsdk" + (Index - 2);
}
}
private int GetImagesCount()
{
lock (Images)
{
return Images.Count;
}
}
private void EnsureLoaded()
{
if (Interlocked.CompareExchange(ref Loaded, 1, 0) == 0)
{
ScanMemoryForTextSegments();
}
}
private void ScanMemoryForTextSegments()
{
ulong OldAddress = 0;
ulong Address = 0;
while (Address >= OldAddress)
{
KMemoryInfo Info = Owner.MemoryManager.QueryMemory(Address);
if (Info.State == MemoryState.Reserved)
{
break;
}
if (Info.State == MemoryState.CodeStatic && Info.Permission == MemoryPermission.ReadAndExecute)
{
LoadMod0Symbols(Owner.CpuMemory, (long)Info.Address);
}
OldAddress = Address;
Address = Info.Address + Info.Size;
}
}
private void LoadMod0Symbols(MemoryManager Memory, long TextOffset)
{
long Mod0Offset = TextOffset + Memory.ReadUInt32(TextOffset + 4);
if (Mod0Offset < TextOffset || !Memory.IsMapped(Mod0Offset) || (Mod0Offset & 3) != 0)
{
return;
}
Dictionary<ElfDynamicTag, long> Dynamic = new Dictionary<ElfDynamicTag, long>();
int Mod0Magic = Memory.ReadInt32(Mod0Offset + 0x0);
if (Mod0Magic != Mod0)
{
return;
}
long DynamicOffset = Memory.ReadInt32(Mod0Offset + 0x4) + Mod0Offset;
long BssStartOffset = Memory.ReadInt32(Mod0Offset + 0x8) + Mod0Offset;
long BssEndOffset = Memory.ReadInt32(Mod0Offset + 0xc) + Mod0Offset;
long EhHdrStartOffset = Memory.ReadInt32(Mod0Offset + 0x10) + Mod0Offset;
long EhHdrEndOffset = Memory.ReadInt32(Mod0Offset + 0x14) + Mod0Offset;
long ModObjOffset = Memory.ReadInt32(Mod0Offset + 0x18) + Mod0Offset;
while (true)
{
long TagVal = Memory.ReadInt64(DynamicOffset + 0);
long Value = Memory.ReadInt64(DynamicOffset + 8);
DynamicOffset += 0x10;
ElfDynamicTag Tag = (ElfDynamicTag)TagVal;
if (Tag == ElfDynamicTag.DT_NULL)
{
break;
}
Dynamic[Tag] = Value;
}
if (!Dynamic.TryGetValue(ElfDynamicTag.DT_STRTAB, out long StrTab) ||
!Dynamic.TryGetValue(ElfDynamicTag.DT_SYMTAB, out long SymTab) ||
!Dynamic.TryGetValue(ElfDynamicTag.DT_SYMENT, out long SymEntSize))
{
return;
}
long StrTblAddr = TextOffset + StrTab;
long SymTblAddr = TextOffset + SymTab;
List<ElfSymbol> Symbols = new List<ElfSymbol>();
while ((ulong)SymTblAddr < (ulong)StrTblAddr)
{
ElfSymbol Sym = GetSymbol(Memory, SymTblAddr, StrTblAddr);
Symbols.Add(Sym);
SymTblAddr += SymEntSize;
}
lock (Images)
{
Images.Add(new Image(TextOffset, Symbols.OrderBy(x => x.Value).ToArray()));
}
}
private ElfSymbol GetSymbol(MemoryManager Memory, long Address, long StrTblAddr)
{
int NameIndex = Memory.ReadInt32(Address + 0);
int Info = Memory.ReadByte (Address + 4);
int Other = Memory.ReadByte (Address + 5);
int SHIdx = Memory.ReadInt16(Address + 6);
long Value = Memory.ReadInt64(Address + 8);
long Size = Memory.ReadInt64(Address + 16);
string Name = string.Empty;
for (int Chr; (Chr = Memory.ReadByte(StrTblAddr + NameIndex++)) != 0;)
{
Name += (char)Chr;
}
return new ElfSymbol(Name, Info, Other, SHIdx, Value, Size);
}
}
}