upload android base code part8

android/toolchain/binutils/binutils-2.25/gold/gdb-index.h

@@ -0,0 +1,264 @@
+// gdb-index.h -- generate .gdb_index section for fast debug lookup  -*- C++ -*-
+
+// Copyright (C) 2012-2014 Free Software Foundation, Inc.
+// Written by Cary Coutant <ccoutant@google.com>.
+
+// This file is part of gold.
+
+// This program is free software; you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation; either version 3 of the License, or
+// (at your option) any later version.
+
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+
+// You should have received a copy of the GNU General Public License
+// along with this program; if not, write to the Free Software
+// Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
+// MA 02110-1301, USA.
+
+#include <sys/types.h>
+#include <vector>
+
+#include "gold.h"
+#include "output.h"
+#include "mapfile.h"
+#include "stringpool.h"
+
+#ifndef GOLD_GDB_INDEX_H
+#define GOLD_GDB_INDEX_H
+
+namespace gold
+{
+
+class Output_section;
+class Output_file;
+class Mapfile;
+template<int size, bool big_endian>
+class Sized_relobj;
+class Dwarf_range_list;
+template <typename T>
+class Gdb_hashtab;
+class Gdb_index_info_reader;
+class Dwarf_pubnames_table;
+
+// This class manages the .gdb_index section, which is a fast
+// lookup table for DWARF information used by the gdb debugger.
+// The format of this section is described in gdb/doc/gdb.texinfo.
+
+class Gdb_index : public Output_section_data
+{
+ public:
+  Gdb_index(Output_section* gdb_index_section);
+
+  ~Gdb_index();
+
+  // Scan a .debug_info or .debug_types input section.
+  void scan_debug_info(bool is_type_unit,
+		       Relobj* object,
+		       const unsigned char* symbols,
+		       off_t symbols_size,
+		       unsigned int shndx,
+		       unsigned int reloc_shndx,
+		       unsigned int reloc_type);
+
+  // Add a compilation unit.
+  int
+  add_comp_unit(off_t cu_offset, off_t cu_length)
+  {
+    this->comp_units_.push_back(Comp_unit(cu_offset, cu_length));
+    return this->comp_units_.size() - 1;
+  }
+
+  // Add a type unit.
+  int
+  add_type_unit(off_t tu_offset, off_t type_offset, uint64_t signature)
+  {
+    this->type_units_.push_back(Type_unit(tu_offset, type_offset, signature));
+    return this->type_units_.size() - 1;
+  }
+
+  // Add an address range.
+  void
+  add_address_range_list(Relobj* object, unsigned int cu_index,
+			 Dwarf_range_list* ranges)
+  {
+    this->ranges_.push_back(Per_cu_range_list(object, cu_index, ranges));
+  }
+
+  // Add a symbol.  FLAGS are the gdb_index version 7 flags to be stored in
+  // the high-byte of the cu_index field.
+  void
+  add_symbol(int cu_index, const char* sym_name, uint8_t flags);
+
+  // Return the offset into the pubnames table for the cu at the given
+  // offset.
+  off_t
+  find_pubname_offset(off_t cu_offset);
+
+  // Return the offset into the pubtypes table for the cu at the
+  // given offset.
+  off_t
+  find_pubtype_offset(off_t cu_offset);
+
+  // Return TRUE if we have already processed the pubnames and types
+  // set for OBJECT of the CUs and TUS associated with the statement
+  // list at OFFSET.
+  bool
+  pubnames_read(const Relobj* object, off_t offset);
+
+  // Record that we have already read the pubnames associated with
+  // OBJECT and OFFSET.
+  void
+  set_pubnames_read(const Relobj* object, off_t offset);
+
+  // Return a pointer to the given table.
+  Dwarf_pubnames_table*
+  pubnames_table()
+  { return pubnames_table_; }
+
+  Dwarf_pubnames_table*
+  pubtypes_table()
+  { return pubtypes_table_; }
+
+  // Print usage statistics.
+  static void
+  print_stats();
+
+ protected:
+  // This is called to update the section size prior to assigning
+  // the address and file offset.
+  void
+  update_data_size()
+  { this->set_final_data_size(); }
+
+  // Set the final data size.
+  void
+  set_final_data_size();
+
+  // Write the data to the file.
+  void
+  do_write(Output_file*);
+
+  // Write to a map file.
+  void
+  do_print_to_mapfile(Mapfile* mapfile) const
+  { mapfile->print_output_data(this, _("** gdb_index")); }
+
+  // Create a map from dies to pubnames.
+  Dwarf_pubnames_table*
+  map_pubtable_to_dies(unsigned int attr,
+                       Gdb_index_info_reader* dwinfo,
+                       Relobj* object,
+                       const unsigned char* symbols,
+                       off_t symbols_size);
+
+  // Wrapper for map_pubtable_to_dies
+  void
+  map_pubnames_and_types_to_dies(Gdb_index_info_reader* dwinfo,
+                                 Relobj* object,
+                                 const unsigned char* symbols,
+                                 off_t symbols_size);
+
+ private:
+  // An entry in the compilation unit list.
+  struct Comp_unit
+  {
+    Comp_unit(off_t off, off_t len)
+      : cu_offset(off), cu_length(len)
+    { }
+    uint64_t cu_offset;
+    uint64_t cu_length;
+  };
+
+  // An entry in the type unit list.
+  struct Type_unit
+  {
+    Type_unit(off_t off, off_t toff, uint64_t sig)
+      : tu_offset(off), type_offset(toff), type_signature(sig)
+    { }
+    uint64_t tu_offset;
+    uint64_t type_offset;
+    uint64_t type_signature;
+  };
+
+  // An entry in the address range list.
+  struct Per_cu_range_list
+  {
+    Per_cu_range_list(Relobj* obj, uint32_t index, Dwarf_range_list* r)
+      : object(obj), cu_index(index), ranges(r)
+    { }
+    Relobj* object;
+    uint32_t cu_index;
+    Dwarf_range_list* ranges;
+  };
+
+  // A symbol table entry.
+  struct Gdb_symbol
+  {
+    Stringpool::Key name_key;
+    unsigned int hashval;
+    unsigned int cu_vector_index;
+
+    // Return the hash value.
+    unsigned int
+    hash()
+    { return this->hashval; }
+
+    // Return true if this symbol is the same as SYMBOL.
+    bool
+    equal(Gdb_symbol* symbol)
+    { return this->name_key == symbol->name_key; }
+  };
+
+  typedef std::vector<std::pair<int, uint8_t> > Cu_vector;
+
+  typedef Unordered_map<off_t, off_t> Pubname_offset_map;
+  Pubname_offset_map cu_pubname_map_;
+  Pubname_offset_map cu_pubtype_map_;
+
+  // Scan the given pubtable and build a map of the various dies it
+  // refers to, so we can process the entries when we encounter the
+  // die.
+  void
+  map_pubtable_to_dies(Dwarf_pubnames_table* table,
+                       Pubname_offset_map* map);
+
+  // Tables to store the pubnames section of the current object.
+  Dwarf_pubnames_table* pubnames_table_;
+  Dwarf_pubnames_table* pubtypes_table_;
+
+  // The .gdb_index section.
+  Output_section* gdb_index_section_;
+  // The list of DWARF compilation units.
+  std::vector<Comp_unit> comp_units_;
+  // The list of DWARF type units.
+  std::vector<Type_unit> type_units_;
+  // The list of address ranges.
+  std::vector<Per_cu_range_list> ranges_;
+  // The symbol table.
+  Gdb_hashtab<Gdb_symbol>* gdb_symtab_;
+  // The CU vector portion of the constant pool.
+  std::vector<Cu_vector*> cu_vector_list_;
+  // An array to map from a CU vector index to an offset to the constant pool.
+  off_t* cu_vector_offsets_;
+  // The string portion of the constant pool.
+  Stringpool stringpool_;
+  // Offsets of the various pieces of the .gdb_index section.
+  off_t tu_offset_;
+  off_t addr_offset_;
+  off_t symtab_offset_;
+  off_t cu_pool_offset_;
+  off_t stringpool_offset_;
+  // Object, stmt list offset of the CUs and TUs associated with the
+  // last read pubnames and pubtypes sections.
+  const Relobj* pubnames_object_;
+  off_t stmt_list_offset_;
+};
+
+} // End namespace gold.
+
+#endif // !defined(GOLD_GDB_INDEX_H)