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Add a C++ demangler (#119)
* Add a C++ demangler for PrintStackTrace This is a simple C++ demangler (only supporting name demangling) that will probably be enough for any stacktrace cases. * Create Ryujinx.Core.OsHle.Diagnostics.Demangler and move DemangleName * Rename Demangler -> Demangle + Fix coding style * Starting a real parsing for demangler (still simple and no compression support yet) * Partially implement decompression * Improve compression support (still need to fix errored compression indexing) * Some cleanup * Fix Demangle.Parse call in PrintStackTrace * Trim parameters result to get more clear prototypes * Rename Demangle -> Demangler and fix access level * Fix substitution possible issues also improve code readability * Redo compression indexing to be more accurate * Add support of not nested function name
This commit is contained in:
Thomas Guillemard
gdkchan
parent
7ac5f40532
commit
fa4b34bd19
2 changed files with 423 additions and 0 deletions
418
Ryujinx.Core/OsHle/Diagnostics/Demangler.cs
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418
Ryujinx.Core/OsHle/Diagnostics/Demangler.cs
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@ -0,0 +1,418 @@
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using System;
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using System.Collections;
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using System.Collections.Generic;
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using System.Globalization;
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using System.Linq;
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namespace Ryujinx.Core.OsHle.Diagnostics
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{
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static class Demangler
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{
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private static readonly Dictionary<string, string> BuiltinTypes = new Dictionary<string, string>
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{
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{ "v", "void" },
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{ "w", "wchar_t" },
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{ "b", "bool" },
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{ "c", "char" },
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{ "a", "signed char" },
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{ "h", "unsigned char" },
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{ "s", "short" },
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{ "t", "unsigned short" },
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{ "i", "int" },
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{ "j", "unsigned int" },
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{ "l", "long" },
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{ "m", "unsigned long" },
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{ "x", "long long" },
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{ "y", "unsigned long long" },
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{ "n", "__int128" },
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{ "o", "unsigned __int128" },
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{ "f", "float" },
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{ "d", "double" },
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{ "e", "long double" },
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{ "g", "__float128" },
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{ "z", "..." },
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{ "Dd", "__iec559_double" },
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{ "De", "__iec559_float128" },
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{ "Df", "__iec559_float" },
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{ "Dh", "__iec559_float16" },
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{ "Di", "char32_t" },
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{ "Ds", "char16_t" },
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{ "Da", "decltype(auto)" },
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{ "Dn", "std::nullptr_t" },
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};
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private static readonly Dictionary<string, string> SubstitutionExtra = new Dictionary<string, string>
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{
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{"Sa", "std::allocator"},
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{"Sb", "std::basic_string"},
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{"Ss", "std::basic_string<char, ::std::char_traits<char>, ::std::allocator<char>>"},
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{"Si", "std::basic_istream<char, ::std::char_traits<char>>"},
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{"So", "std::basic_ostream<char, ::std::char_traits<char>>"},
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{"Sd", "std::basic_iostream<char, ::std::char_traits<char>>"}
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};
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private static int FromBase36(string encoded)
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{
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string base36 = "0123456789abcdefghijklmnopqrstuvwxyz";
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char[] reversedEncoded = encoded.ToLower().ToCharArray().Reverse().ToArray();
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int result = 0;
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for (int i = 0; i < reversedEncoded.Length; i++)
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{
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char c = reversedEncoded[i];
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int value = base36.IndexOf(c);
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if (value == -1)
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return -1;
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result += value * (int)Math.Pow(36, i);
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}
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return result;
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}
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private static string GetCompressedValue(string compression, List<string> compressionData, out int pos)
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{
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string res = null;
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bool canHaveUnqualifiedName = false;
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pos = -1;
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if (compressionData.Count == 0 || !compression.StartsWith("S"))
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return null;
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if (compression.Length >= 2 && SubstitutionExtra.TryGetValue(compression.Substring(0, 2), out string substitutionValue))
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{
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pos = 1;
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res = substitutionValue;
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compression = compression.Substring(2);
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}
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else if (compression.StartsWith("St"))
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{
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pos = 1;
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canHaveUnqualifiedName = true;
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res = "std";
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compression = compression.Substring(2);
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}
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else if (compression.StartsWith("S_"))
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{
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pos = 1;
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res = compressionData[0];
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canHaveUnqualifiedName = true;
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compression = compression.Substring(2);
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}
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else
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{
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int id = -1;
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int underscorePos = compression.IndexOf('_');
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if (underscorePos == -1)
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return null;
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string partialId = compression.Substring(1, underscorePos - 1);
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id = FromBase36(partialId);
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if (id == -1 || compressionData.Count <= (id + 1))
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{
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return null;
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}
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res = compressionData[id + 1];
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pos = partialId.Length + 1;
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canHaveUnqualifiedName= true;
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compression = compression.Substring(pos);
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}
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if (res != null)
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{
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if (canHaveUnqualifiedName)
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{
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List<string> type = ReadName(compression, compressionData, out int endOfNameType);
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if (endOfNameType != -1 && type != null)
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{
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pos += endOfNameType;
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res = res + "::" + type[type.Count - 1];
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}
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}
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}
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return res;
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}
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private static List<string> ReadName(string mangled, List<string> compressionData, out int pos, bool isNested = true)
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{
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List<string> res = new List<string>();
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string charCountString = null;
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int charCount = 0;
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int i;
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pos = -1;
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for (i = 0; i < mangled.Length; i++)
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{
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char chr = mangled[i];
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if (charCountString == null)
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{
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if (ReadCVQualifiers(chr) != null)
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{
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continue;
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}
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if (chr == 'S')
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{
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string data = GetCompressedValue(mangled.Substring(i), compressionData, out pos);
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if (pos == -1)
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{
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return null;
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}
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if (res.Count == 0)
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res.Add(data);
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else
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res.Add(res[res.Count - 1] + "::" + data);
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i += pos;
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if (i < mangled.Length && mangled[i] == 'E')
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{
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break;
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}
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continue;
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}
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else if (chr == 'E')
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{
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break;
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}
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}
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if (Char.IsDigit(chr))
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{
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charCountString += chr;
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}
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else
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{
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if (!int.TryParse(charCountString, out charCount))
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{
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return null;
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}
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string demangledPart = mangled.Substring(i, charCount);
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if (res.Count == 0)
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res.Add(demangledPart);
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else
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res.Add(res[res.Count - 1] + "::" + demangledPart);
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i = i + charCount - 1;
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charCount = 0;
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charCountString = null;
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if (!isNested)
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break;
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}
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}
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if (res.Count == 0)
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{
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return null;
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}
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pos = i;
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return res;
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}
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private static string ReadBuiltinType(string mangledType, out int pos)
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{
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string res = null;
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string possibleBuiltinType;
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pos = -1;
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possibleBuiltinType = mangledType[0].ToString();
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if (!BuiltinTypes.TryGetValue(possibleBuiltinType, out res))
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{
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if (mangledType.Length >= 2)
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{
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// Try to match the first 2 chars if the first call failed
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possibleBuiltinType = mangledType.Substring(0, 2);
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BuiltinTypes.TryGetValue(possibleBuiltinType, out res);
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}
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}
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if (res != null)
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pos = possibleBuiltinType.Length;
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return res;
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}
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private static string ReadCVQualifiers(char qualifier)
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{
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if (qualifier == 'r')
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return "restricted";
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else if (qualifier == 'V')
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return "volatile";
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else if (qualifier == 'K')
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return "const";
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return null;
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}
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private static string ReadRefQualifiers(char qualifier)
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{
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if (qualifier == 'R')
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return "&";
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else if (qualifier == 'O')
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return "&&";
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return null;
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}
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private static string ReadSpecialQualifiers(char qualifier)
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{
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if (qualifier == 'P')
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return "*";
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else if (qualifier == 'C')
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return "complex";
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else if (qualifier == 'G')
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return "imaginary";
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return null;
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}
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private static List<string> ReadParameters(string mangledParams, List<string> compressionData, out int pos)
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{
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List<string> res = new List<string>();
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List<string> refQualifiers = new List<string>();
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string parsedTypePart = null;
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string currentRefQualifiers = null;
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string currentBuiltinType = null;
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string currentSpecialQualifiers = null;
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string currentCompressedValue = null;
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int i = 0;
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pos = -1;
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for (i = 0; i < mangledParams.Length; i++)
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{
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if (currentBuiltinType != null)
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{
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string currentCVQualifier = String.Join(" ", refQualifiers);
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// Try to mimic the compression indexing
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if (currentRefQualifiers != null)
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{
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compressionData.Add(currentBuiltinType + currentRefQualifiers);
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}
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if (refQualifiers.Count != 0)
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{
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compressionData.Add(currentBuiltinType + " " + currentCVQualifier + currentRefQualifiers);
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}
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if (currentSpecialQualifiers != null)
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{
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compressionData.Add(currentBuiltinType + " " + currentCVQualifier + currentRefQualifiers + currentSpecialQualifiers);
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}
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if (currentRefQualifiers == null && currentCVQualifier == null && currentSpecialQualifiers == null)
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{
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compressionData.Add(currentBuiltinType);
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}
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currentBuiltinType = null;
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currentCompressedValue = null;
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currentCVQualifier = null;
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currentRefQualifiers = null;
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refQualifiers.Clear();
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currentSpecialQualifiers = null;
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}
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char chr = mangledParams[i];
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string part = mangledParams.Substring(i);
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// Try to read qualifiers
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parsedTypePart = ReadCVQualifiers(chr);
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if (parsedTypePart != null)
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{
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refQualifiers.Add(parsedTypePart);
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// need more data
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continue;
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}
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parsedTypePart = ReadRefQualifiers(chr);
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if (parsedTypePart != null)
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{
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currentRefQualifiers = parsedTypePart;
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// need more data
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continue;
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}
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parsedTypePart = ReadSpecialQualifiers(chr);
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if (parsedTypePart != null)
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{
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currentSpecialQualifiers = parsedTypePart;
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// need more data
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continue;
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}
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// TODO: extended-qualifier?
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if (part.StartsWith("S"))
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{
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parsedTypePart = GetCompressedValue(part, compressionData, out pos);
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if (pos != -1 && parsedTypePart != null)
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{
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currentCompressedValue = parsedTypePart;
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i += pos;
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res.Add(currentCompressedValue + " " + String.Join(" ", refQualifiers) + currentRefQualifiers + currentSpecialQualifiers);
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currentBuiltinType = null;
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currentCompressedValue = null;
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currentRefQualifiers = null;
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refQualifiers.Clear();
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currentSpecialQualifiers = null;
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continue;
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}
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pos = -1;
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return null;
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}
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else if (part.StartsWith("N"))
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{
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part = part.Substring(1);
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List<string> name = ReadName(part, compressionData, out pos);
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if (pos != -1 && name != null)
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{
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i += pos + 1;
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res.Add(name[name.Count - 1] + " " + String.Join(" ", refQualifiers) + currentRefQualifiers + currentSpecialQualifiers);
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currentBuiltinType = null;
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currentCompressedValue = null;
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currentRefQualifiers = null;
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refQualifiers.Clear();
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currentSpecialQualifiers = null;
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continue;
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}
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}
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// Try builting
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parsedTypePart = ReadBuiltinType(part, out pos);
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if (pos == -1)
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{
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return null;
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}
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currentBuiltinType = parsedTypePart;
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res.Add(currentBuiltinType + " " + String.Join(" ", refQualifiers) + currentRefQualifiers + currentSpecialQualifiers);
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i = i + pos -1;
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}
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pos = i;
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return res;
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}
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private static string ParseFunctionName(string mangled)
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{
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List<string> compressionData = new List<string>();
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int pos = 0;
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string res;
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bool isNested = mangled.StartsWith("N");
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// If it's start with "N" it must be a nested function name
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if (isNested)
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mangled = mangled.Substring(1);
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compressionData = ReadName(mangled, compressionData, out pos, isNested);
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if (pos == -1)
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return null;
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res = compressionData[compressionData.Count - 1];
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compressionData.Remove(res);
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mangled = mangled.Substring(pos + 1);
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// more data? maybe not a data name so...
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if (mangled != String.Empty)
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{
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List<string> parameters = ReadParameters(mangled, compressionData, out pos);
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// parameters parsing error, we return the original data to avoid information loss.
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if (pos == -1)
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return null;
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parameters = parameters.Select(outer => outer.Trim()).ToList();
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res += "(" + String.Join(", ", parameters) + ")";
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}
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return res;
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}
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public static string Parse(string originalMangled)
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{
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if (originalMangled.StartsWith("_Z"))
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{
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// We assume that we have a name (TOOD: support special names)
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string res = ParseFunctionName(originalMangled.Substring(2));
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if (res == null)
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return originalMangled;
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return res;
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}
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return originalMangled;
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}
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}
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}
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@ -5,6 +5,7 @@ using ChocolArm64.State;
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using Ryujinx.Core.Loaders;
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using Ryujinx.Core.Loaders.Executables;
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using Ryujinx.Core.Logging;
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using Ryujinx.Core.OsHle.Diagnostics;
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using Ryujinx.Core.OsHle.Exceptions;
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using Ryujinx.Core.OsHle.Handles;
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using Ryujinx.Core.OsHle.Kernel;
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@ -306,6 +307,10 @@ namespace Ryujinx.Core.OsHle
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{
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SubName = $"Sub{Position: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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Trace.AppendLine(" " + SubName + " (" + GetNsoNameAndAddress(Position) + ")");
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}
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