[CodeView] Add more DebugSubsection implementations.
This adds implementations for Symbols and FrameData, and renames
the existing codeview::StringTable class to conform to the
DebugSectionStringTable convention.
llvm-svn: 304222
diff --git a/llvm/lib/DebugInfo/CodeView/DebugStringTableSubsection.cpp b/llvm/lib/DebugInfo/CodeView/DebugStringTableSubsection.cpp
new file mode 100644
index 0000000..b8741eb
--- /dev/null
+++ b/llvm/lib/DebugInfo/CodeView/DebugStringTableSubsection.cpp
@@ -0,0 +1,78 @@
+//===- DebugStringTableSubsection.cpp - CodeView String Table ---*- C++ -*-===//
+//
+// The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+
+#include "llvm/DebugInfo/CodeView/DebugStringTableSubsection.h"
+
+#include "llvm/Support/BinaryStream.h"
+#include "llvm/Support/BinaryStreamReader.h"
+#include "llvm/Support/BinaryStreamWriter.h"
+
+using namespace llvm;
+using namespace llvm::codeview;
+
+DebugStringTableSubsectionRef::DebugStringTableSubsectionRef()
+ : DebugSubsectionRef(DebugSubsectionKind::StringTable) {}
+
+Error DebugStringTableSubsectionRef::initialize(BinaryStreamRef Contents) {
+ Stream = Contents;
+ return Error::success();
+}
+
+Expected<StringRef>
+DebugStringTableSubsectionRef::getString(uint32_t Offset) const {
+ BinaryStreamReader Reader(Stream);
+ Reader.setOffset(Offset);
+ StringRef Result;
+ if (auto EC = Reader.readCString(Result))
+ return std::move(EC);
+ return Result;
+}
+
+DebugStringTableSubsection::DebugStringTableSubsection()
+ : DebugSubsection(DebugSubsectionKind::StringTable) {}
+
+uint32_t DebugStringTableSubsection::insert(StringRef S) {
+ auto P = Strings.insert({S, StringSize});
+
+ // If a given string didn't exist in the string table, we want to increment
+ // the string table size.
+ if (P.second)
+ StringSize += S.size() + 1; // +1 for '\0'
+ return P.first->second;
+}
+
+uint32_t DebugStringTableSubsection::calculateSerializedSize() const {
+ return StringSize;
+}
+
+Error DebugStringTableSubsection::commit(BinaryStreamWriter &Writer) const {
+ assert(Writer.bytesRemaining() == StringSize);
+ uint32_t MaxOffset = 1;
+
+ for (auto &Pair : Strings) {
+ StringRef S = Pair.getKey();
+ uint32_t Offset = Pair.getValue();
+ Writer.setOffset(Offset);
+ if (auto EC = Writer.writeCString(S))
+ return EC;
+ MaxOffset = std::max<uint32_t>(MaxOffset, Offset + S.size() + 1);
+ }
+
+ Writer.setOffset(MaxOffset);
+ assert(Writer.bytesRemaining() == 0);
+ return Error::success();
+}
+
+uint32_t DebugStringTableSubsection::size() const { return Strings.size(); }
+
+uint32_t DebugStringTableSubsection::getStringId(StringRef S) const {
+ auto P = Strings.find(S);
+ assert(P != Strings.end());
+ return P->second;
+}