Extend info printed when guest crashes/breaks execution (#1845)
* Add CPU register printout when guest crashes/breaks execution * Print out registers when undefined instruction is hit * Apply suggestions from code review Co-authored-by: Ac_K <Acoustik666@gmail.com> * Fixes after rebase * Address gdkchan's comments Co-authored-by: Ac_K <Acoustik666@gmail.com> Co-authored-by: Mary <me@thog.eu>
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Somebody Whoisbored
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4 changed files with 170 additions and 35 deletions
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@ -1,5 +1,6 @@
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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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@ -18,12 +19,15 @@ namespace Ryujinx.HLE.HOS.Kernel.Process
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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, ElfSymbol[] symbols)
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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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@ -39,41 +43,28 @@ namespace Ryujinx.HLE.HOS.Kernel.Process
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_images = new List<Image>();
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}
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public string GetGuestStackTrace(ARMeilleure.State.ExecutionContext context)
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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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Image image = GetImage(address, out int imageIndex);
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if (image == null || !TryGetSubName(image, address, out string subName))
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if(AnalyzePointer(out PointerInfo info, address, thread))
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{
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subName = $"Sub{address:x16}";
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}
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else if (subName.StartsWith("_Z"))
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{
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subName = Demangler.Parse(subName);
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}
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if (image != null)
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{
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ulong offset = address - image.BaseAddress;
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string imageName = GetGuessedNsoNameFromIndex(imageIndex);
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trace.AppendLine($" {imageName}:0x{offset:x8} {subName}");
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trace.AppendLine($" 0x{address:x16}\t{info.ImageDisplay}\t{info.SubDisplay}");
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}
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else
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{
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trace.AppendLine($" ??? {subName}");
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trace.AppendLine($" 0x{address:x16}");
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}
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}
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trace.AppendLine($"Process: {_owner.Name}, PID: {_owner.Pid}");
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if (context.IsAarch32)
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{
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ulong framePointer = context.GetX(11);
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@ -114,7 +105,47 @@ namespace Ryujinx.HLE.HOS.Kernel.Process
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return trace.ToString();
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}
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private bool TryGetSubName(Image image, ulong address, out string name)
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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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@ -127,18 +158,27 @@ namespace Ryujinx.HLE.HOS.Kernel.Process
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int middle = left + (size >> 1);
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ElfSymbol symbol = image.Symbols[middle];
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symbol = image.Symbols[middle];
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ulong endAddr = symbol.Value + symbol.Size;
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if ((ulong)address >= symbol.Value && (ulong)address < endAddr)
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if (address >= symbol.Value && address < endAddr)
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{
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name = symbol.Name;
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return true;
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}
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if ((ulong)address < (ulong)symbol.Value)
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if (middle + 1 < image.Symbols.Length)
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{
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ElfSymbol next = image.Symbols[middle + 1];
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// If our symbol points inbetween two symbols, we can *guess* that it's referring to the first one
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if (address >= symbol.Value && address < next.Value)
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{
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return true;
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}
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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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@ -148,18 +188,100 @@ namespace Ryujinx.HLE.HOS.Kernel.Process
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}
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}
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name = null;
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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)
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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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@ -226,7 +348,7 @@ namespace Ryujinx.HLE.HOS.Kernel.Process
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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);
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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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@ -235,7 +357,7 @@ namespace Ryujinx.HLE.HOS.Kernel.Process
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}
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}
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private void LoadMod0Symbols(IVirtualMemoryManager memory, ulong textOffset)
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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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@ -315,7 +437,7 @@ namespace Ryujinx.HLE.HOS.Kernel.Process
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lock (_images)
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{
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_images.Add(new Image(textOffset, symbols.OrderBy(x => x.Value).ToArray()));
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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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@ -1073,6 +1073,7 @@ namespace Ryujinx.HLE.HOS.Kernel.Process
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private bool InvalidAccessHandler(ulong va)
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{
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KernelStatic.GetCurrentThread()?.PrintGuestStackTrace();
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KernelStatic.GetCurrentThread()?.PrintGuestRegisterPrintout();
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Logger.Error?.Print(LogClass.Cpu, $"Invalid memory access at virtual address 0x{va:X16}.");
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@ -1082,6 +1083,7 @@ namespace Ryujinx.HLE.HOS.Kernel.Process
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private void UndefinedInstructionHandler(object sender, InstUndefinedEventArgs e)
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{
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KernelStatic.GetCurrentThread().PrintGuestStackTrace();
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KernelStatic.GetCurrentThread()?.PrintGuestRegisterPrintout();
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throw new UndefinedInstructionException(e.Address, e.OpCode);
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}
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@ -1409,6 +1409,7 @@ namespace Ryujinx.HLE.HOS.Kernel.SupervisorCall
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if ((reason & (1UL << 31)) == 0)
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{
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currentThread.PrintGuestStackTrace();
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currentThread.PrintGuestRegisterPrintout();
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// As the process is exiting, this is probably caused by emulation termination.
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if (currentThread.Owner.State == ProcessState.Exiting)
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@ -991,7 +991,12 @@ namespace Ryujinx.HLE.HOS.Kernel.Threading
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public string GetGuestStackTrace()
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{
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return Owner.Debugger.GetGuestStackTrace(Context);
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return Owner.Debugger.GetGuestStackTrace(this);
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}
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public string GetGuestRegisterPrintout()
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{
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return Owner.Debugger.GetCpuRegisterPrintout(this);
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}
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public void PrintGuestStackTrace()
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@ -999,6 +1004,11 @@ namespace Ryujinx.HLE.HOS.Kernel.Threading
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Logger.Info?.Print(LogClass.Cpu, $"Guest stack trace:\n{GetGuestStackTrace()}\n");
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}
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public void PrintGuestRegisterPrintout()
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{
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Logger.Info?.Print(LogClass.Cpu, $"Guest CPU registers:\n{GetGuestRegisterPrintout()}\n");
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}
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public void AddCpuTime(long ticks)
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{
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Interlocked.Add(ref _totalTimeRunning, ticks);
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