vendor/llvm/llvm-trunk-r301939

1 files changed, 91 insertions, 0 deletions

diff --git a/include/llvm/DebugInfo/CodeView/ModuleDebugFileChecksumFragment.h b/include/llvm/DebugInfo/CodeView/ModuleDebugFileChecksumFragment.h
new file mode 100644
index 0000000000000..a5a3b851b8415
--- /dev/null
+++ b/include/llvm/DebugInfo/CodeView/ModuleDebugFileChecksumFragment.h
@@ -0,0 +1,91 @@
+//===- ModuleDebugFileChecksumFragment.h ------------------------*- C++ -*-===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef LLVM_DEBUGINFO_CODEVIEW_MODULEDEBUGFILECHECKSUMFRAGMENT_H
+#define LLVM_DEBUGINFO_CODEVIEW_MODULEDEBUGFILECHECKSUMFRAGMENT_H
+
+#include "llvm/ADT/ArrayRef.h"
+#include "llvm/ADT/DenseMap.h"
+#include "llvm/DebugInfo/CodeView/ModuleDebugFragment.h"
+#include "llvm/Support/Allocator.h"
+#include "llvm/Support/BinaryStreamArray.h"
+#include "llvm/Support/BinaryStreamReader.h"
+#include "llvm/Support/Endian.h"
+
+namespace llvm {
+namespace codeview {
+
+struct FileChecksumEntry {
+  uint32_t FileNameOffset;    // Byte offset of filename in global stringtable.
+  FileChecksumKind Kind;      // The type of checksum.
+  ArrayRef<uint8_t> Checksum; // The bytes of the checksum.
+};
+}
+}
+
+namespace llvm {
+template <> struct VarStreamArrayExtractor<codeview::FileChecksumEntry> {
+public:
+  typedef void ContextType;
+
+  static Error extract(BinaryStreamRef Stream, uint32_t &Len,
+                       codeview::FileChecksumEntry &Item, void *Ctx);
+};
+}
+
+namespace llvm {
+namespace codeview {
+class ModuleDebugFileChecksumFragmentRef final : public ModuleDebugFragmentRef {
+  typedef VarStreamArray<codeview::FileChecksumEntry> FileChecksumArray;
+  typedef FileChecksumArray::Iterator Iterator;
+
+public:
+  ModuleDebugFileChecksumFragmentRef()
+      : ModuleDebugFragmentRef(ModuleDebugFragmentKind::FileChecksums) {}
+
+  static bool classof(const ModuleDebugFragmentRef *S) {
+    return S->kind() == ModuleDebugFragmentKind::FileChecksums;
+  }
+
+  Error initialize(BinaryStreamReader Reader);
+
+  Iterator begin() const { return Checksums.begin(); }
+  Iterator end() const { return Checksums.end(); }
+
+  const FileChecksumArray &getArray() const { return Checksums; }
+
+private:
+  FileChecksumArray Checksums;
+};
+
+class ModuleDebugFileChecksumFragment final : public ModuleDebugFragment {
+public:
+  ModuleDebugFileChecksumFragment();
+
+  static bool classof(const ModuleDebugFragment *S) {
+    return S->kind() == ModuleDebugFragmentKind::FileChecksums;
+  }
+
+  void addChecksum(uint32_t StringTableOffset, FileChecksumKind Kind,
+                   ArrayRef<uint8_t> Bytes);
+
+  uint32_t calculateSerializedLength() override;
+  Error commit(BinaryStreamWriter &Writer) override;
+  uint32_t mapChecksumOffset(uint32_t StringTableOffset) const;
+
+private:
+  DenseMap<uint32_t, uint32_t> OffsetMap;
+  uint32_t SerializedSize = 0;
+  llvm::BumpPtrAllocator Storage;
+  std::vector<FileChecksumEntry> Checksums;
+};
+}
+}
+
+#endif