intermediate changes

ref:cde9a383711a11544ce7e107a78147fb96cc4029

1 files changed, 147 insertions, 0 deletions

diff --git a/contrib/libs/llvm12/include/llvm/DebugInfo/DWARF/DWARFDebugMacro.h b/contrib/libs/llvm12/include/llvm/DebugInfo/DWARF/DWARFDebugMacro.h
new file mode 100644
index 0000000000..f731a7f8b3
--- /dev/null
+++ b/contrib/libs/llvm12/include/llvm/DebugInfo/DWARF/DWARFDebugMacro.h
@@ -0,0 +1,147 @@
+#pragma once
+
+#ifdef __GNUC__
+#pragma GCC diagnostic push
+#pragma GCC diagnostic ignored "-Wunused-parameter"
+#endif
+
+//===- DWARFDebugMacro.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_DWARF_DWARFDEBUGMACRO_H
+#define LLVM_DEBUGINFO_DWARF_DWARFDEBUGMACRO_H
+
+#include "llvm/ADT/SmallVector.h"
+#include "llvm/DebugInfo/DWARF/DWARFDataExtractor.h"
+#include "llvm/DebugInfo/DWARF/DWARFUnit.h"
+#include "llvm/Support/Errc.h"
+#include "llvm/Support/Error.h"
+#include <cstdint>
+
+namespace llvm {
+
+class raw_ostream;
+
+class DWARFDebugMacro {
+  /// DWARFv5 section 6.3.1 Macro Information Header.
+  enum HeaderFlagMask {
+#define HANDLE_MACRO_FLAG(ID, NAME) MACRO_##NAME = ID,
+#include "llvm/BinaryFormat/Dwarf.def"
+  };
+  struct MacroHeader {
+    /// Macro version information number.
+    uint16_t Version = 0;
+
+    /// The bits of the flags field are interpreted as a set of flags, some of
+    /// which may indicate that additional fields follow. The following flags,
+    /// beginning with the least significant bit, are defined:
+    /// offset_size_flag:
+    ///   If the offset_size_flag is zero, the header is for a 32-bit DWARF
+    ///   format macro section and all offsets are 4 bytes long; if it is one,
+    ///   the header is for a 64-bit DWARF format macro section and all offsets
+    ///   are 8 bytes long.
+    /// debug_line_offset_flag:
+    ///   If the debug_line_offset_flag is one, the debug_line_offset field (see
+    ///   below) is present. If zero, that field is omitted.
+    /// opcode_operands_table_flag:
+    ///   If the opcode_operands_table_flag is one, the opcode_operands_table
+    ///   field (see below) is present. If zero, that field is omitted.
+    uint8_t Flags = 0;
+
+    /// debug_line_offset
+    ///   An offset in the .debug_line section of the beginning of the line
+    ///   number information in the containing compilation unit, encoded as a
+    ///   4-byte offset for a 32-bit DWARF format macro section and an 8-byte
+    ///   offset for a 64-bit DWARF format macro section.
+    uint64_t DebugLineOffset;
+
+    /// Print the macro header from the debug_macro section.
+    void dumpMacroHeader(raw_ostream &OS) const;
+
+    /// Parse the debug_macro header.
+    Error parseMacroHeader(DWARFDataExtractor Data, uint64_t *Offset);
+
+    /// Get the DWARF format according to the flags.
+    dwarf::DwarfFormat getDwarfFormat() const;
+
+    /// Get the size of a reference according to the DWARF format.
+    uint8_t getOffsetByteSize() const;
+  };
+
+  /// A single macro entry within a macro list.
+  struct Entry {
+    /// The type of the macro entry.
+    uint32_t Type;
+    union {
+      /// The source line where the macro is defined.
+      uint64_t Line;
+      /// Vendor extension constant value.
+      uint64_t ExtConstant;
+      /// Macro unit import offset.
+      uint64_t ImportOffset;
+    };
+
+    union {
+      /// The string (name, value) of the macro entry.
+      const char *MacroStr;
+      // An unsigned integer indicating the identity of the source file.
+      uint64_t File;
+      /// Vendor extension string.
+      const char *ExtStr;
+    };
+  };
+
+  struct MacroList {
+    // A value 0 in the `Header.Version` field indicates that we're parsing
+    // a macinfo[.dwo] section which doesn't have header itself, hence
+    // for that case other fields in the `Header` are uninitialized.
+    MacroHeader Header;
+    SmallVector<Entry, 4> Macros;
+    uint64_t Offset;
+
+    /// Whether or not this is a .debug_macro section.
+    bool IsDebugMacro;
+  };
+
+  /// A list of all the macro entries in the debug_macinfo section.
+  std::vector<MacroList> MacroLists;
+
+public:
+  DWARFDebugMacro() = default;
+
+  /// Print the macro list found within the debug_macinfo/debug_macro section.
+  void dump(raw_ostream &OS) const;
+
+  Error parseMacro(DWARFUnitVector::compile_unit_range Units,
+                   DataExtractor StringExtractor,
+                   DWARFDataExtractor MacroData) {
+    return parseImpl(Units, StringExtractor, MacroData, /*IsMacro=*/true);
+  }
+
+  Error parseMacinfo(DWARFDataExtractor MacroData) {
+    return parseImpl(None, None, MacroData, /*IsMacro=*/false);
+  }
+
+  /// Return whether the section has any entries.
+  bool empty() const { return MacroLists.empty(); }
+
+private:
+  /// Parse the debug_macinfo/debug_macro section accessible via the 'MacroData'
+  /// parameter.
+  Error parseImpl(Optional<DWARFUnitVector::compile_unit_range> Units,
+                  Optional<DataExtractor> StringExtractor,
+                  DWARFDataExtractor Data, bool IsMacro);
+};
+
+} // end namespace llvm
+
+#endif // LLVM_DEBUGINFO_DWARF_DWARFDEBUGMACRO_H
+
+#ifdef __GNUC__
+#pragma GCC diagnostic pop
+#endif