From 08bbd35a80bf7765fe0d3043f9eb5a2f2786b649 Mon Sep 17 00:00:00 2001
From: Dimitry Andric <dim@FreeBSD.org>
Date: Mon, 26 Jun 2017 20:32:52 +0000
Subject: Vendor import of llvm trunk r306325:
 https://llvm.org/svn/llvm-project/llvm/trunk@306325

---
 .../DebugInfo/CodeView/RandomAccessVisitorTest.cpp | 52 ++++++++++++++++++++++
 1 file changed, 52 insertions(+)

(limited to 'unittests/DebugInfo/CodeView/RandomAccessVisitorTest.cpp')

diff --git a/unittests/DebugInfo/CodeView/RandomAccessVisitorTest.cpp b/unittests/DebugInfo/CodeView/RandomAccessVisitorTest.cpp
index 4fa172a37ef2d..92134513b75b9 100644
--- a/unittests/DebugInfo/CodeView/RandomAccessVisitorTest.cpp
+++ b/unittests/DebugInfo/CodeView/RandomAccessVisitorTest.cpp
@@ -351,3 +351,55 @@ TEST_F(RandomAccessVisitorTest, InnerChunk) {
   for (auto &I : enumerate(IndicesToVisit))
     EXPECT_TRUE(ValidateVisitedRecord(I.index(), I.value()));
 }
+
+TEST_F(RandomAccessVisitorTest, CrossChunkName) {
+  TypeTableBuilder Builder(GlobalState->Allocator);
+
+  // TypeIndex 0
+  ClassRecord Class(TypeRecordKind::Class);
+  Class.Name = "FooClass";
+  Class.Options = ClassOptions::None;
+  Class.MemberCount = 0;
+  Class.Size = 4U;
+  Class.DerivationList = TypeIndex::fromArrayIndex(0);
+  Class.FieldList = TypeIndex::fromArrayIndex(0);
+  Class.VTableShape = TypeIndex::fromArrayIndex(0);
+  TypeIndex IndexZero = Builder.writeKnownType(Class);
+
+  // TypeIndex 1 refers to type index 0.
+  ModifierRecord Modifier(TypeRecordKind::Modifier);
+  Modifier.ModifiedType = TypeIndex::fromArrayIndex(0);
+  Modifier.Modifiers = ModifierOptions::Const;
+  TypeIndex IndexOne = Builder.writeKnownType(Modifier);
+
+  // set up a type stream that refers to the above two serialized records.
+  std::vector<CVType> TypeArray;
+  TypeArray.push_back(
+      CVType(static_cast<TypeLeafKind>(Class.Kind), Builder.records()[0]));
+  TypeArray.push_back(
+      CVType(static_cast<TypeLeafKind>(Modifier.Kind), Builder.records()[1]));
+  BinaryItemStream<CVType> ItemStream(llvm::support::little);
+  ItemStream.setItems(TypeArray);
+  VarStreamArray<CVType> TypeStream(ItemStream);
+
+  // Figure out the byte offset of the second item.
+  auto ItemOneIter = TypeStream.begin();
+  ++ItemOneIter;
+
+  // Set up a partial offsets buffer that contains the first and second items
+  // in separate chunks.
+  std::vector<TypeIndexOffset> TIO;
+  TIO.push_back({IndexZero, ulittle32_t(0u)});
+  TIO.push_back({IndexOne, ulittle32_t(ItemOneIter.offset())});
+  ArrayRef<uint8_t> Buffer(reinterpret_cast<const uint8_t *>(TIO.data()),
+                           TIO.size() * sizeof(TypeIndexOffset));
+
+  BinaryStreamReader Reader(Buffer, llvm::support::little);
+  FixedStreamArray<TypeIndexOffset> PartialOffsets;
+  ASSERT_THAT_ERROR(Reader.readArray(PartialOffsets, 2), Succeeded());
+
+  LazyRandomTypeCollection Types(TypeStream, 2, PartialOffsets);
+
+  StringRef Name = Types.getTypeName(IndexOne);
+  EXPECT_EQ("const FooClass", Name);
+}
\ No newline at end of file
-- 
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