1 files changed, 84 insertions, 0 deletions
diff --git a/third_party/llvm-project/include/llvm/DebugInfo/DWARF/DWARFDebugAranges.h b/third_party/llvm-project/include/llvm/DebugInfo/DWARF/DWARFDebugAranges.h
new file mode 100644
index 000000000..172f1d2c9
--- /dev/null
+++ b/third_party/llvm-project/include/llvm/DebugInfo/DWARF/DWARFDebugAranges.h
@@ -0,0 +1,84 @@
+//===- DWARFDebugAranges.h --------------------------------------*- C++ -*-===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef LLVM_DEBUGINFO_DWARFDEBUGARANGES_H
+#define LLVM_DEBUGINFO_DWARFDEBUGARANGES_H
+
+#include "llvm/ADT/DenseSet.h"
+#include "llvm/Support/DataExtractor.h"
+#include <cstdint>
+#include <vector>
+
+namespace llvm {
+
+class DWARFContext;
+
+class DWARFDebugAranges {
+public:
+  void generate(DWARFContext *CTX);
+  uint32_t findAddress(uint64_t Address) const;
+
+private:
+  void clear();
+  void extract(DataExtractor DebugArangesData);
+
+  /// Call appendRange multiple times and then call construct.
+  void appendRange(uint64_t CUOffset, uint64_t LowPC, uint64_t HighPC);
+  void construct();
+
+  struct Range {
+    explicit Range(uint64_t LowPC = -1ULL, uint64_t HighPC = -1ULL,
+                   uint32_t CUOffset = -1U)
+      : LowPC(LowPC), Length(HighPC - LowPC), CUOffset(CUOffset) {}
+
+    void setHighPC(uint64_t HighPC) {
+      if (HighPC == -1ULL || HighPC <= LowPC)
+        Length = 0;
+      else
+        Length = HighPC - LowPC;
+    }
+
+    uint64_t HighPC() const {
+      if (Length)
+        return LowPC + Length;
+      return -1ULL;
+    }
+
+    bool operator<(const Range &other) const {
+      return LowPC < other.LowPC;
+    }
+
+    uint64_t LowPC; /// Start of address range.
+    uint32_t Length; /// End of address range (not including this address).
+    uint32_t CUOffset; /// Offset of the compile unit or die.
+  };
+
+  struct RangeEndpoint {
+    uint64_t Address;
+    uint64_t CUOffset;
+    bool IsRangeStart;
+
+    RangeEndpoint(uint64_t Address, uint64_t CUOffset, bool IsRangeStart)
+        : Address(Address), CUOffset(CUOffset), IsRangeStart(IsRangeStart) {}
+
+    bool operator<(const RangeEndpoint &Other) const {
+      return Address < Other.Address;
+    }
+  };
+
+  using RangeColl = std::vector<Range>;
+  using RangeCollIterator = RangeColl::const_iterator;
+
+  std::vector<RangeEndpoint> Endpoints;
+  RangeColl Aranges;
+  DenseSet<uint64_t> ParsedCUOffsets;
+};
+
+} // end namespace llvm
+
+#endif // LLVM_DEBUGINFO_DWARFDEBUGARANGES_H