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
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
|
// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.
// See the LICENSE file in the project root for more information.
using System;
using System.Collections.Generic;
using System.Diagnostics;
using System.Linq;
using System.Reflection.Metadata;
using System.Reflection.PortableExecutable;
using Internal.Text;
using Internal.TypeSystem;
using Internal.TypeSystem.Ecma;
namespace ILCompiler.DependencyAnalysis
{
/// <summary>
/// Blob of data containing resources for all assemblies generated into the image.
/// Resources are simply copied from the inputs and concatenated into this blob.
/// All format information is provided by <see cref="ResourceIndexNode"/>
/// </summary>
internal class ResourceDataNode : ObjectNode, ISymbolDefinitionNode
{
/// <summary>
/// Resource index information generated while extracting resources into the data blob
/// </summary>
private List<ResourceIndexData> _indexData;
private int _totalLength;
public ResourceDataNode()
{
_endSymbol = new ObjectAndOffsetSymbolNode(this, 0, "__embedded_resourcedata_End", true);
}
private ObjectAndOffsetSymbolNode _endSymbol;
public ISymbolDefinitionNode EndSymbol => _endSymbol;
public override bool IsShareable => false;
public override ObjectNodeSection Section => ObjectNodeSection.ReadOnlyDataSection;
public override bool StaticDependenciesAreComputed => true;
public int Offset => 0;
public void AppendMangledName(NameMangler nameMangler, Utf8StringBuilder sb)
{
sb.Append(nameMangler.CompilationUnitPrefix).Append("__embedded_resourcedata");
}
protected override string GetName(NodeFactory factory) => this.GetMangledName(factory.NameMangler);
public override ObjectData GetData(NodeFactory factory, bool relocsOnly = false)
{
// This node has no relocations.
if (relocsOnly)
return new ObjectData(Array.Empty<byte>(), Array.Empty<Relocation>(), 1, new ISymbolDefinitionNode[] { this });
byte[] blob = GenerateResourceBlob(factory);
return new ObjectData(
blob,
Array.Empty<Relocation>(),
1,
new ISymbolDefinitionNode[]
{
this,
EndSymbol
});
}
public IReadOnlyList<ResourceIndexData> GetOrCreateIndexData(NodeFactory factory)
{
if (_indexData != null)
{
return _indexData;
}
_totalLength = 0;
_indexData = new List<ResourceIndexData>();
// Build up index information
foreach (EcmaAssembly module in factory.MetadataManager.GetCompilationModulesWithMetadata().OfType<EcmaAssembly>())
{
PEMemoryBlock resourceDirectory = module.PEReader.GetSectionData(module.PEReader.PEHeaders.CorHeader.ResourcesDirectory.RelativeVirtualAddress);
try
{
checked
{
foreach (var resourceHandle in module.MetadataReader.ManifestResources)
{
ManifestResource resource = module.MetadataReader.GetManifestResource(resourceHandle);
// Don't try to embed linked resources or resources in other assemblies
if (!resource.Implementation.IsNil)
{
continue;
}
string resourceName = module.MetadataReader.GetString(resource.Name);
// Check if emitting the manifest resource is blocked by policy.
if (factory.MetadataManager.IsManifestResourceBlocked(module, resourceName))
continue;
string assemblyName = module.GetName().FullName;
BlobReader reader = resourceDirectory.GetReader((int)resource.Offset, resourceDirectory.Length - (int)resource.Offset);
int length = (int)reader.ReadUInt32();
ResourceIndexData indexData = new ResourceIndexData(assemblyName, resourceName, _totalLength, (int)resource.Offset + sizeof(Int32), module, length);
_indexData.Add(indexData);
_totalLength += length;
}
}
}
catch (OverflowException)
{
throw new BadImageFormatException();
}
}
return _indexData;
}
/// <summary>
/// Extracts resources from all modules being compiled into a single blob and saves
/// the information needed to create an index into that blob.
/// </summary>
private byte[] GenerateResourceBlob(NodeFactory factory)
{
GetOrCreateIndexData(factory);
// Read resources into the blob
byte[] resourceBlob = new byte[_totalLength];
int currentPos = 0;
foreach (ResourceIndexData indexData in _indexData)
{
EcmaModule module = indexData.EcmaModule;
PEMemoryBlock resourceDirectory = module.PEReader.GetSectionData(module.PEReader.PEHeaders.CorHeader.ResourcesDirectory.RelativeVirtualAddress);
Debug.Assert(currentPos == indexData.NativeOffset);
BlobReader reader = resourceDirectory.GetReader(indexData.EcmaOffset, indexData.Length);
byte[] resourceData = reader.ReadBytes(indexData.Length);
Buffer.BlockCopy(resourceData, 0, resourceBlob, currentPos, resourceData.Length);
currentPos += resourceData.Length;
}
_endSymbol.SetSymbolOffset(resourceBlob.Length);
return resourceBlob;
}
protected internal override int Phase => (int)ObjectNodePhase.Ordered;
public override int ClassCode => (int)ObjectNodeOrder.ResourceDataNode;
}
/// <summary>
/// Data about individual manifest resources
/// </summary>
internal class ResourceIndexData
{
public ResourceIndexData(string assemblyName, string resourceName, int nativeOffset, int ecmaOffset, EcmaModule ecmaModule, int length)
{
AssemblyName = assemblyName;
ResourceName = resourceName;
NativeOffset = nativeOffset;
EcmaOffset = ecmaOffset;
EcmaModule = ecmaModule;
Length = length;
}
/// <summary>
/// Full name of the assembly that contains the resource
/// </summary>
public string AssemblyName { get; }
/// <summary>
/// Name of the resource
/// </summary>
public string ResourceName { get; }
/// <summary>
/// Offset of the resource within the native resource blob
/// </summary>
public int NativeOffset { get; }
/// <summary>
/// Offset of the resource within the .mresources section of the ECMA module
/// </summary>
public int EcmaOffset { get; }
/// <summary>
/// Module the resource is defined in
/// </summary>
public EcmaModule EcmaModule { get; }
/// <summary>
/// Length of the resource
/// </summary>
public int Length { get; }
}
}
|
