466 lines
14 KiB
C#
466 lines
14 KiB
C#
using Ryujinx.HLE.HOS.Diagnostics.Demangler;
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using Ryujinx.HLE.HOS.Kernel.Memory;
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using Ryujinx.HLE.HOS.Kernel.Threading;
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using Ryujinx.HLE.Loaders.Elf;
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using Ryujinx.Memory;
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using System.Collections.Generic;
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using System.Linq;
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using System.Text;
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using System.Threading;
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namespace Ryujinx.HLE.HOS.Kernel.Process
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{
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class HleProcessDebugger
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{
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private const int Mod0 = 'M' << 0 | 'O' << 8 | 'D' << 16 | '0' << 24;
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private KProcess _owner;
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private class Image
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{
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public ulong BaseAddress { get; }
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public ulong Size { get; }
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public ulong EndAddress => BaseAddress + Size;
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public ElfSymbol[] Symbols { get; }
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public Image(ulong baseAddress, ulong size, ElfSymbol[] symbols)
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{
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BaseAddress = baseAddress;
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Size = size;
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Symbols = symbols;
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}
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}
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private List<Image> _images;
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private int _loaded;
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public HleProcessDebugger(KProcess owner)
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{
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_owner = owner;
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_images = new List<Image>();
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}
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public string GetGuestStackTrace(KThread thread)
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{
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EnsureLoaded();
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var context = thread.Context;
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StringBuilder trace = new StringBuilder();
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trace.AppendLine($"Process: {_owner.Name}, PID: {_owner.Pid}");
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void AppendTrace(ulong address)
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{
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if(AnalyzePointer(out PointerInfo info, address, thread))
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{
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trace.AppendLine($" 0x{address:x16}\t{info.ImageDisplay}\t{info.SubDisplay}");
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}
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else
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{
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trace.AppendLine($" 0x{address:x16}");
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}
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}
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if (context.IsAarch32)
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{
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ulong framePointer = context.GetX(11);
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while (framePointer != 0)
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{
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if ((framePointer & 3) != 0 ||
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!_owner.CpuMemory.IsMapped(framePointer) ||
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!_owner.CpuMemory.IsMapped(framePointer + 4))
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{
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break;
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}
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AppendTrace(_owner.CpuMemory.Read<uint>(framePointer + 4));
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framePointer = _owner.CpuMemory.Read<uint>(framePointer);
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}
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}
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else
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{
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ulong framePointer = context.GetX(29);
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while (framePointer != 0)
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{
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if ((framePointer & 7) != 0 ||
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!_owner.CpuMemory.IsMapped(framePointer) ||
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!_owner.CpuMemory.IsMapped(framePointer + 8))
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{
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break;
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}
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AppendTrace(_owner.CpuMemory.Read<ulong>(framePointer + 8));
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framePointer = _owner.CpuMemory.Read<ulong>(framePointer);
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}
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}
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return trace.ToString();
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}
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public string GetCpuRegisterPrintout(KThread thread)
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{
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EnsureLoaded();
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var context = thread.Context;
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StringBuilder sb = new StringBuilder();
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string GetReg(int x)
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{
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var v = x == 32 ? (ulong)thread.LastPc : context.GetX(x);
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if (!AnalyzePointer(out PointerInfo info, v, thread))
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{
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return $"0x{v:x16}";
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}
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else
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{
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if (!string.IsNullOrEmpty(info.ImageName))
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{
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return $"0x{v:x16} ({info.ImageDisplay})\t=> {info.SubDisplay}";
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}
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else
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{
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return $"0x{v:x16} ({info.SpDisplay})";
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}
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}
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}
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for (int i = 0; i <= 28; i++)
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{
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sb.AppendLine($"\tX[{i:d2}]:\t{GetReg(i)}");
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}
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sb.AppendLine($"\tFP:\t{GetReg(29)}");
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sb.AppendLine($"\tLR:\t{GetReg(30)}");
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sb.AppendLine($"\tSP:\t{GetReg(31)}");
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sb.AppendLine($"\tPC:\t{GetReg(32)}");
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return sb.ToString();
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}
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private bool TryGetSubName(Image image, ulong address, out ElfSymbol symbol)
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{
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address -= image.BaseAddress;
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int left = 0;
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int right = image.Symbols.Length - 1;
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while (left <= right)
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{
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int size = right - left;
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int middle = left + (size >> 1);
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symbol = image.Symbols[middle];
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ulong endAddr = symbol.Value + symbol.Size;
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if (address >= symbol.Value && address < endAddr)
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{
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return true;
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}
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if (address < symbol.Value)
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{
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right = middle - 1;
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}
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else
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{
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left = middle + 1;
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}
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}
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symbol = default;
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return false;
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}
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struct PointerInfo
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{
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public string ImageName;
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public string SubName;
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public ulong Offset;
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public ulong SubOffset;
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public string ImageDisplay => $"{ImageName}:0x{Offset:x4}";
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public string SubDisplay => SubOffset == 0 ? SubName : $"{SubName}:0x{SubOffset:x4}";
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public string SpDisplay => SubOffset == 0 ? "SP" : $"SP:-0x{SubOffset:x4}";
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}
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private bool AnalyzePointer(out PointerInfo info, ulong address, KThread thread)
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{
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if (AnalyzePointerFromImages(out info, address))
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{
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return true;
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}
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if (AnalyzePointerFromStack(out info, address, thread))
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{
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return true;
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}
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return false;
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}
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private bool AnalyzePointerFromImages(out PointerInfo info, ulong address)
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{
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info = default;
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Image image = GetImage(address, out int imageIndex);
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if (image == null)
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{
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// Value isn't a pointer to a known image...
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return false;
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}
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info.Offset = address - image.BaseAddress;
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// Try to find what this pointer is referring to
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if (TryGetSubName(image, address, out ElfSymbol symbol))
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{
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info.SubName = symbol.Name;
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// Demangle string if possible
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if (info.SubName.StartsWith("_Z"))
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{
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info.SubName = Demangler.Parse(info.SubName);
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}
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info.SubOffset = info.Offset - symbol.Value;
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}
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else
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{
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info.SubName = "";
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}
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info.ImageName = GetGuessedNsoNameFromIndex(imageIndex);
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return true;
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}
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private bool AnalyzePointerFromStack(out PointerInfo info, ulong address, KThread thread)
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{
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info = default;
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ulong sp = thread.Context.GetX(31);
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var memoryInfo = _owner.MemoryManager.QueryMemory(address);
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MemoryState memoryState = memoryInfo.State;
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if (!memoryState.HasFlag(MemoryState.Stack)) // Is this pointer within the stack?
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{
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return false;
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}
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info.SubOffset = address - sp;
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return true;
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}
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private Image GetImage(ulong address, out int index)
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{
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lock (_images)
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{
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for (index = _images.Count - 1; index >= 0; index--)
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{
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if (address >= _images[index].BaseAddress && address < _images[index].EndAddress)
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{
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return _images[index];
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}
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}
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}
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return null;
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}
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private string GetGuessedNsoNameFromIndex(int index)
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{
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if ((uint)index > 11)
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{
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return "???";
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}
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if (index == 0)
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{
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return "rtld";
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}
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else if (index == 1)
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{
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return "main";
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}
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else if (index == GetImagesCount() - 1)
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{
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return "sdk";
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}
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else
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{
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return "subsdk" + (index - 2);
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}
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}
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private int GetImagesCount()
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{
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lock (_images)
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{
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return _images.Count;
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}
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}
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private void EnsureLoaded()
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{
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if (Interlocked.CompareExchange(ref _loaded, 1, 0) == 0)
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{
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ScanMemoryForTextSegments();
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}
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}
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private void ScanMemoryForTextSegments()
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{
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ulong oldAddress = 0;
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ulong address = 0;
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while (address >= oldAddress)
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{
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KMemoryInfo info = _owner.MemoryManager.QueryMemory(address);
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if (info.State == MemoryState.Reserved)
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{
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break;
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}
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if (info.State == MemoryState.CodeStatic && info.Permission == KMemoryPermission.ReadAndExecute)
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{
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LoadMod0Symbols(_owner.CpuMemory, info.Address, info.Size);
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}
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oldAddress = address;
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address = info.Address + info.Size;
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}
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}
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private void LoadMod0Symbols(IVirtualMemoryManager memory, ulong textOffset, ulong textSize)
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{
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ulong mod0Offset = textOffset + memory.Read<uint>(textOffset + 4);
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if (mod0Offset < textOffset || !memory.IsMapped(mod0Offset) || (mod0Offset & 3) != 0)
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{
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return;
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}
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Dictionary<ElfDynamicTag, ulong> dynamic = new Dictionary<ElfDynamicTag, ulong>();
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int mod0Magic = memory.Read<int>(mod0Offset + 0x0);
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if (mod0Magic != Mod0)
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{
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return;
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}
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ulong dynamicOffset = memory.Read<uint>(mod0Offset + 0x4) + mod0Offset;
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ulong bssStartOffset = memory.Read<uint>(mod0Offset + 0x8) + mod0Offset;
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ulong bssEndOffset = memory.Read<uint>(mod0Offset + 0xc) + mod0Offset;
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ulong ehHdrStartOffset = memory.Read<uint>(mod0Offset + 0x10) + mod0Offset;
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ulong ehHdrEndOffset = memory.Read<uint>(mod0Offset + 0x14) + mod0Offset;
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ulong modObjOffset = memory.Read<uint>(mod0Offset + 0x18) + mod0Offset;
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bool isAArch32 = memory.Read<ulong>(dynamicOffset) > 0xFFFFFFFF || memory.Read<ulong>(dynamicOffset + 0x10) > 0xFFFFFFFF;
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while (true)
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{
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ulong tagVal;
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ulong value;
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if (isAArch32)
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{
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tagVal = memory.Read<uint>(dynamicOffset + 0);
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value = memory.Read<uint>(dynamicOffset + 4);
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dynamicOffset += 0x8;
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}
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else
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{
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tagVal = memory.Read<ulong>(dynamicOffset + 0);
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value = memory.Read<ulong>(dynamicOffset + 8);
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dynamicOffset += 0x10;
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}
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ElfDynamicTag tag = (ElfDynamicTag)tagVal;
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if (tag == ElfDynamicTag.DT_NULL)
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{
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break;
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}
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dynamic[tag] = value;
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}
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if (!dynamic.TryGetValue(ElfDynamicTag.DT_STRTAB, out ulong strTab) ||
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!dynamic.TryGetValue(ElfDynamicTag.DT_SYMTAB, out ulong symTab) ||
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!dynamic.TryGetValue(ElfDynamicTag.DT_SYMENT, out ulong symEntSize))
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{
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return;
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}
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ulong strTblAddr = textOffset + strTab;
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ulong symTblAddr = textOffset + symTab;
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List<ElfSymbol> symbols = new List<ElfSymbol>();
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while (symTblAddr < strTblAddr)
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{
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ElfSymbol sym = isAArch32 ? GetSymbol32(memory, symTblAddr, strTblAddr) : GetSymbol64(memory, symTblAddr, strTblAddr);
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symbols.Add(sym);
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symTblAddr += symEntSize;
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}
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lock (_images)
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{
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_images.Add(new Image(textOffset, textSize, symbols.OrderBy(x => x.Value).ToArray()));
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}
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}
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private ElfSymbol GetSymbol64(IVirtualMemoryManager memory, ulong address, ulong strTblAddr)
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{
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ElfSymbol64 sym = memory.Read<ElfSymbol64>(address);
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uint nameIndex = sym.NameOffset;
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string name = string.Empty;
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for (int chr; (chr = memory.Read<byte>(strTblAddr + nameIndex++)) != 0;)
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{
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name += (char)chr;
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}
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return new ElfSymbol(name, sym.Info, sym.Other, sym.SectionIndex, sym.ValueAddress, sym.Size);
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}
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private ElfSymbol GetSymbol32(IVirtualMemoryManager memory, ulong address, ulong strTblAddr)
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{
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ElfSymbol32 sym = memory.Read<ElfSymbol32>(address);
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uint nameIndex = sym.NameOffset;
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string name = string.Empty;
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for (int chr; (chr = memory.Read<byte>(strTblAddr + nameIndex++)) != 0;)
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{
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name += (char)chr;
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}
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return new ElfSymbol(name, sym.Info, sym.Other, sym.SectionIndex, sym.ValueAddress, sym.Size);
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}
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}
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}
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