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Add a C++ demangler (#119)

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* 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 2018-05-22 22:40:02 +02:00 committed by gdkchan
parent 7ac5f40532
commit fa4b34bd19
2 changed files with 423 additions and 0 deletions
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418
Ryujinx.Core/OsHle/Diagnostics/Demangler.cs Normal file
View file

@ -0,0 +1,418 @@
using System;
using System.Collections;
using System.Collections.Generic;
using System.Globalization;
using System.Linq;
namespace Ryujinx.Core.OsHle.Diagnostics
{
static class Demangler
{
private static readonly Dictionary<string, string> BuiltinTypes = new Dictionary<string, string>
{
{ "v", "void" },
{ "w", "wchar_t" },
{ "b", "bool" },
{ "c", "char" },
{ "a", "signed char" },
{ "h", "unsigned char" },
{ "s", "short" },
{ "t", "unsigned short" },
{ "i", "int" },
{ "j", "unsigned int" },
{ "l", "long" },
{ "m", "unsigned long" },
{ "x", "long long" },
{ "y", "unsigned long long" },
{ "n", "__int128" },
{ "o", "unsigned __int128" },
{ "f", "float" },
{ "d", "double" },
{ "e", "long double" },
{ "g", "__float128" },
{ "z", "..." },
{ "Dd", "__iec559_double" },
{ "De", "__iec559_float128" },
{ "Df", "__iec559_float" },
{ "Dh", "__iec559_float16" },
{ "Di", "char32_t" },
{ "Ds", "char16_t" },
{ "Da", "decltype(auto)" },
{ "Dn", "std::nullptr_t" },
};
private static readonly Dictionary<string, string> SubstitutionExtra = new Dictionary<string, string>
{
{"Sa", "std::allocator"},
{"Sb", "std::basic_string"},
{"Ss", "std::basic_string<char, ::std::char_traits<char>, ::std::allocator<char>>"},
{"Si", "std::basic_istream<char, ::std::char_traits<char>>"},
{"So", "std::basic_ostream<char, ::std::char_traits<char>>"},
{"Sd", "std::basic_iostream<char, ::std::char_traits<char>>"}
};
private static int FromBase36(string encoded)
{
string base36 = "0123456789abcdefghijklmnopqrstuvwxyz";
char[] reversedEncoded = encoded.ToLower().ToCharArray().Reverse().ToArray();
int result = 0;
for (int i = 0; i < reversedEncoded.Length; i++)
{
char c = reversedEncoded[i];
int value = base36.IndexOf(c);
if (value == -1)
return -1;
result += value * (int)Math.Pow(36, i);
}
return result;
}
private static string GetCompressedValue(string compression, List<string> compressionData, out int pos)
{
string res = null;
bool canHaveUnqualifiedName = false;
pos = -1;
if (compressionData.Count == 0 || !compression.StartsWith("S"))
return null;
if (compression.Length >= 2 && SubstitutionExtra.TryGetValue(compression.Substring(0, 2), out string substitutionValue))
{
pos = 1;
res = substitutionValue;
compression = compression.Substring(2);
}
else if (compression.StartsWith("St"))
{
pos = 1;
canHaveUnqualifiedName = true;
res = "std";
compression = compression.Substring(2);
}
else if (compression.StartsWith("S_"))
{
pos = 1;
res = compressionData[0];
canHaveUnqualifiedName = true;
compression = compression.Substring(2);
}
else
{
int id = -1;
int underscorePos = compression.IndexOf('_');
if (underscorePos == -1)
return null;
string partialId = compression.Substring(1, underscorePos - 1);
id = FromBase36(partialId);
if (id == -1 || compressionData.Count <= (id + 1))
{
return null;
}
res = compressionData[id + 1];
pos = partialId.Length + 1;
canHaveUnqualifiedName= true;
compression = compression.Substring(pos);
}
if (res != null)
{
if (canHaveUnqualifiedName)
{
List<string> type = ReadName(compression, compressionData, out int endOfNameType);
if (endOfNameType != -1 && type != null)
{
pos += endOfNameType;
res = res + "::" + type[type.Count - 1];
}
}
}
return res;
}
private static List<string> ReadName(string mangled, List<string> compressionData, out int pos, bool isNested = true)
{
List<string> res = new List<string>();
string charCountString = null;
int charCount = 0;
int i;
pos = -1;
for (i = 0; i < mangled.Length; i++)
{
char chr = mangled[i];
if (charCountString == null)
{
if (ReadCVQualifiers(chr) != null)
{
continue;
}
if (chr == 'S')
{
string data = GetCompressedValue(mangled.Substring(i), compressionData, out pos);
if (pos == -1)
{
return null;
}
if (res.Count == 0)
res.Add(data);
else
res.Add(res[res.Count - 1] + "::" + data);
i += pos;
if (i < mangled.Length && mangled[i] == 'E')
{
break;
}
continue;
}
else if (chr == 'E')
{
break;
}
}
if (Char.IsDigit(chr))
{
charCountString += chr;
}
else
{
if (!int.TryParse(charCountString, out charCount))
{
return null;
}
string demangledPart = mangled.Substring(i, charCount);
if (res.Count == 0)
res.Add(demangledPart);
else
res.Add(res[res.Count - 1] + "::" + demangledPart);
i = i + charCount - 1;
charCount = 0;
charCountString = null;
if (!isNested)
break;
}
}
if (res.Count == 0)
{
return null;
}
pos = i;
return res;
}
private static string ReadBuiltinType(string mangledType, out int pos)
{
string res = null;
string possibleBuiltinType;
pos = -1;
possibleBuiltinType = mangledType[0].ToString();
if (!BuiltinTypes.TryGetValue(possibleBuiltinType, out res))
{
if (mangledType.Length >= 2)
{
// Try to match the first 2 chars if the first call failed
possibleBuiltinType = mangledType.Substring(0, 2);
BuiltinTypes.TryGetValue(possibleBuiltinType, out res);
}
}
if (res != null)
pos = possibleBuiltinType.Length;
return res;
}
private static string ReadCVQualifiers(char qualifier)
{
if (qualifier == 'r')
return "restricted";
else if (qualifier == 'V')
return "volatile";
else if (qualifier == 'K')
return "const";
return null;
}
private static string ReadRefQualifiers(char qualifier)
{
if (qualifier == 'R')
return "&";
else if (qualifier == 'O')
return "&&";
return null;
}
private static string ReadSpecialQualifiers(char qualifier)
{
if (qualifier == 'P')
return "*";
else if (qualifier == 'C')
return "complex";
else if (qualifier == 'G')
return "imaginary";
return null;
}
private static List<string> ReadParameters(string mangledParams, List<string> compressionData, out int pos)
{
List<string> res = new List<string>();
List<string> refQualifiers = new List<string>();
string parsedTypePart = null;
string currentRefQualifiers = null;
string currentBuiltinType = null;
string currentSpecialQualifiers = null;
string currentCompressedValue = null;
int i = 0;
pos = -1;
for (i = 0; i < mangledParams.Length; i++)
{
if (currentBuiltinType != null)
{
string currentCVQualifier = String.Join(" ", refQualifiers);
// Try to mimic the compression indexing
if (currentRefQualifiers != null)
{
compressionData.Add(currentBuiltinType + currentRefQualifiers);
}
if (refQualifiers.Count != 0)
{
compressionData.Add(currentBuiltinType + " " + currentCVQualifier + currentRefQualifiers);
}
if (currentSpecialQualifiers != null)
{
compressionData.Add(currentBuiltinType + " " + currentCVQualifier + currentRefQualifiers + currentSpecialQualifiers);
}
if (currentRefQualifiers == null && currentCVQualifier == null && currentSpecialQualifiers == null)
{
compressionData.Add(currentBuiltinType);
}
currentBuiltinType = null;
currentCompressedValue = null;
currentCVQualifier = null;
currentRefQualifiers = null;
refQualifiers.Clear();
currentSpecialQualifiers = null;
}
char chr = mangledParams[i];
string part = mangledParams.Substring(i);
// Try to read qualifiers
parsedTypePart = ReadCVQualifiers(chr);
if (parsedTypePart != null)
{
refQualifiers.Add(parsedTypePart);
// need more data
continue;
}
parsedTypePart = ReadRefQualifiers(chr);
if (parsedTypePart != null)
{
currentRefQualifiers = parsedTypePart;
// need more data
continue;
}
parsedTypePart = ReadSpecialQualifiers(chr);
if (parsedTypePart != null)
{
currentSpecialQualifiers = parsedTypePart;
// need more data
continue;
}
// TODO: extended-qualifier?
if (part.StartsWith("S"))
{
parsedTypePart = GetCompressedValue(part, compressionData, out pos);
if (pos != -1 && parsedTypePart != null)
{
currentCompressedValue = parsedTypePart;
i += pos;
res.Add(currentCompressedValue + " " + String.Join(" ", refQualifiers) + currentRefQualifiers + currentSpecialQualifiers);
currentBuiltinType = null;
currentCompressedValue = null;
currentRefQualifiers = null;
refQualifiers.Clear();
currentSpecialQualifiers = null;
continue;
}
pos = -1;
return null;
}
else if (part.StartsWith("N"))
{
part = part.Substring(1);
List<string> name = ReadName(part, compressionData, out pos);
if (pos != -1 && name != null)
{
i += pos + 1;
res.Add(name[name.Count - 1] + " " + String.Join(" ", refQualifiers) + currentRefQualifiers + currentSpecialQualifiers);
currentBuiltinType = null;
currentCompressedValue = null;
currentRefQualifiers = null;
refQualifiers.Clear();
currentSpecialQualifiers = null;
continue;
}
}
// Try builting
parsedTypePart = ReadBuiltinType(part, out pos);
if (pos == -1)
{
return null;
}
currentBuiltinType = parsedTypePart;
res.Add(currentBuiltinType + " " + String.Join(" ", refQualifiers) + currentRefQualifiers + currentSpecialQualifiers);
i = i + pos -1;
}
pos = i;
return res;
}
private static string ParseFunctionName(string mangled)
{
List<string> compressionData = new List<string>();
int pos = 0;
string res;
bool isNested = mangled.StartsWith("N");
// If it's start with "N" it must be a nested function name
if (isNested)
mangled = mangled.Substring(1);
compressionData = ReadName(mangled, compressionData, out pos, isNested);
if (pos == -1)
return null;
res = compressionData[compressionData.Count - 1];
compressionData.Remove(res);
mangled = mangled.Substring(pos + 1);
// more data? maybe not a data name so...
if (mangled != String.Empty)
{
List<string> parameters = ReadParameters(mangled, compressionData, out pos);
// parameters parsing error, we return the original data to avoid information loss.
if (pos == -1)
return null;
parameters = parameters.Select(outer => outer.Trim()).ToList();
res += "(" + String.Join(", ", parameters) + ")";
}
return res;
}
public static string Parse(string originalMangled)
{
if (originalMangled.StartsWith("_Z"))
{
// We assume that we have a name (TOOD: support special names)
string res = ParseFunctionName(originalMangled.Substring(2));
if (res == null)
return originalMangled;
return res;
}
return originalMangled;
}
}
}

5
Ryujinx.Core/OsHle/Process.cs
View file

@ -5,6 +5,7 @@ using ChocolArm64.State;
using Ryujinx.Core.Loaders;
using Ryujinx.Core.Loaders.Executables;
using Ryujinx.Core.Logging;
using Ryujinx.Core.OsHle.Diagnostics;
using Ryujinx.Core.OsHle.Exceptions;
using Ryujinx.Core.OsHle.Handles;
using Ryujinx.Core.OsHle.Kernel;
@ -306,6 +307,10 @@ namespace Ryujinx.Core.OsHle
{
SubName = $"Sub{Position:x16}";
}
else if (SubName.StartsWith("_Z"))
{
SubName = Demangler.Parse(SubName);
}
Trace.AppendLine(" " + SubName + " (" + GetNsoNameAndAddress(Position) + ")");
}