[codeview] Add support for new types and symbols.

This patch adds support for:

S_EXPORT
LF_BITFIELD

With this patch, I have run through a couple of gigabytes of PDB
files and cannot find a type or symbol that we do not understand.

llvm-svn: 270637

2 files changed, 19 insertions, 0 deletions

diff --git a/llvm/lib/DebugInfo/CodeView/TypeDumper.cpp b/llvm/lib/DebugInfo/CodeView/TypeDumper.cpp
index 72e0e44ce26..74cb2d9e9c4 100644
--- a/llvm/lib/DebugInfo/CodeView/TypeDumper.cpp
+++ b/llvm/lib/DebugInfo/CodeView/TypeDumper.cpp
@@ -209,6 +209,7 @@ public:
 #include "llvm/DebugInfo/CodeView/TypeRecords.def"
 
   void visitUnknownMember(TypeLeafKind Leaf);
+  void visitUnknownType(TypeLeafKind Leaf, ArrayRef<uint8_t> LeafData);
 
   void visitTypeBegin(TypeLeafKind Leaf, ArrayRef<uint8_t> LeafData);
   void visitTypeEnd(TypeLeafKind Leaf, ArrayRef<uint8_t> LeafData);
@@ -493,6 +494,13 @@ void CVTypeDumperImpl::visitModifier(TypeLeafKind Leaf, ModifierRecord &Mod) {
   Name = CVTD.saveName(TypeName);
 }
 
+void CVTypeDumperImpl::visitBitField(TypeLeafKind Leaf,
+                                     BitFieldRecord &BitField) {
+  printTypeIndex("Type", BitField.getType());
+  W.printNumber("BitSize", BitField.getBitSize());
+  W.printNumber("BitOffset", BitField.getBitOffset());
+}
+
 void CVTypeDumperImpl::visitVFTableShape(TypeLeafKind Leaf,
                                          VFTableShapeRecord &Shape) {
   W.printNumber("VFEntryCount", Shape.getEntryCount());
@@ -538,6 +546,13 @@ void CVTypeDumperImpl::visitUnknownMember(TypeLeafKind Leaf) {
   W.printHex("UnknownMember", unsigned(Leaf));
 }
 
+void CVTypeDumperImpl::visitUnknownType(TypeLeafKind Leaf,
+                                        ArrayRef<uint8_t> RecordData) {
+  DictScope S(W, "UnknownType");
+  W.printEnum("Kind", uint16_t(Leaf), makeArrayRef(LeafTypeNames));
+  W.printNumber("Length", uint32_t(RecordData.size()));
+}
+
 void CVTypeDumperImpl::visitNestedType(TypeLeafKind Leaf,
                                        NestedTypeRecord &Nested) {
   DictScope S(W, "NestedType");
diff --git a/llvm/lib/DebugInfo/CodeView/TypeRecord.cpp b/llvm/lib/DebugInfo/CodeView/TypeRecord.cpp
index 57cd5b7e264..e9782978535 100644
--- a/llvm/lib/DebugInfo/CodeView/TypeRecord.cpp
+++ b/llvm/lib/DebugInfo/CodeView/TypeRecord.cpp
@@ -105,6 +105,10 @@ bool EnumRecord::remapTypeIndices(ArrayRef<TypeIndex> IndexMap) {
   return Success;
 }
 
+bool BitFieldRecord::remapTypeIndices(ArrayRef<TypeIndex> IndexMap) {
+  return remapIndex(IndexMap, Type);
+}
+
 bool VFTableShapeRecord::remapTypeIndices(ArrayRef<TypeIndex> IndexMap) {
   return true;
 }