blob: 8b3ec3f0138cc63c1b756337da5aa030cb99ebb4 (
plain) (
blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
|
using ChocolArm64.Memory;
using ChocolArm64.State;
using System;
using System.Collections.Generic;
using System.Collections.ObjectModel;
using System.Linq;
using System.Reflection;
using System.Reflection.Emit;
namespace ChocolArm64
{
class TranslatedSub
{
private delegate long Aa64Subroutine(CpuThreadState register, MemoryManager memory);
private const int MinCallCountForReJit = 250;
private Aa64Subroutine _execDelegate;
public static int StateArgIdx { get; private set; }
public static int MemoryArgIdx { get; private set; }
public static Type[] FixedArgTypes { get; private set; }
public DynamicMethod Method { get; private set; }
public ReadOnlyCollection<Register> Params { get; private set; }
private HashSet<long> _callers;
private TranslatedSubType _type;
private int _callCount;
private bool _needsReJit;
public TranslatedSub(DynamicMethod method, List<Register> Params)
{
if (method == null)
{
throw new ArgumentNullException(nameof(method));
}
if (Params == null)
{
throw new ArgumentNullException(nameof(Params));
}
Method = method;
this.Params = Params.AsReadOnly();
_callers = new HashSet<long>();
PrepareDelegate();
}
static TranslatedSub()
{
MethodInfo mthdInfo = typeof(Aa64Subroutine).GetMethod("Invoke");
ParameterInfo[] Params = mthdInfo.GetParameters();
FixedArgTypes = new Type[Params.Length];
for (int index = 0; index < Params.Length; index++)
{
Type paramType = Params[index].ParameterType;
FixedArgTypes[index] = paramType;
if (paramType == typeof(CpuThreadState))
{
StateArgIdx = index;
}
else if (paramType == typeof(MemoryManager))
{
MemoryArgIdx = index;
}
}
}
private void PrepareDelegate()
{
string name = $"{Method.Name}_Dispatch";
DynamicMethod mthd = new DynamicMethod(name, typeof(long), FixedArgTypes);
ILGenerator generator = mthd.GetILGenerator();
generator.EmitLdargSeq(FixedArgTypes.Length);
foreach (Register reg in Params)
{
generator.EmitLdarg(StateArgIdx);
generator.Emit(OpCodes.Ldfld, reg.GetField());
}
generator.Emit(OpCodes.Call, Method);
generator.Emit(OpCodes.Ret);
_execDelegate = (Aa64Subroutine)mthd.CreateDelegate(typeof(Aa64Subroutine));
}
public bool ShouldReJit()
{
if (_needsReJit && _callCount < MinCallCountForReJit)
{
_callCount++;
return false;
}
return _needsReJit;
}
public long Execute(CpuThreadState threadState, MemoryManager memory)
{
return _execDelegate(threadState, memory);
}
public void AddCaller(long position)
{
lock (_callers)
{
_callers.Add(position);
}
}
public long[] GetCallerPositions()
{
lock (_callers)
{
return _callers.ToArray();
}
}
public void SetType(TranslatedSubType type)
{
_type = type;
if (type == TranslatedSubType.SubTier0)
{
_needsReJit = true;
}
}
public void MarkForReJit() => _needsReJit = true;
}
}
|
