2013-07-22 Sterling Augustine <saugustine@google.com>

	* dwarf_reader.cc (Dwarf_pubnames_table::read_section):
	Convert parameter shndx to local variable. Add parameters symtab
	and symtab_size.  Scan over section names.  Find relocation
	section corresponding to current section.  Create and initialize
	reloc_mapper_ and reloc_type_.
	(Dwarf_pubnames_table::read_header):  Add assertion.  Change
	unit_length to off_t.  Initialize member unit_length_.  Fill in field
	cu_offset_.
	* dwarf_reader.h (Dwarf_pubnames_table::Dwarf_pubnames_table):
	Initialize new fields unit_length_ and cu_offset_.
	(Dwarf_pubnames_table::read_section): Update prototype.
	(Dwarf_pubnames_table::cu_offset): New member function.
	(Dwarf_pubnames_table::subsection_size): Likewise.
	(Dwarf_pubnames_table::cu_offset_, Dwarf_pubnames_table::unit_length):
	New fields.
	(Dwarf_info_reader::symtab, Dwarf_info_reader::symtab_size): Make
	member functions public.
	* gdb_index.cc (Gdb_index_info_reader::read_pubnames_and_pubtypes):
	Update comment.  Rework logic.  Move repeated parts to...
	(Gdb_index_info_reader::read_pubtable): ...here. New function.
	(Gdb_index::Gdb_index): Initialize new fields, pubnames_table_,
	pubtypes_table_, and stmt_list_offset.
	(Gdb_index::map_pubtable_to_dies, Gdb_index::find_pubname_offset,
	Gdb_index::find_pubtype_offset,
	Gdb_index::map_pubnames_and_types_to_dies): Define new functions.
	(Gdb_index::pubnames_read): Update prototype and rework logic.
	* gdb_index.h (Gdb_index_info_reader, Dwarf_pubnames_table):
	Forward declare.
	(Gdb_index::map_pubtable_to_dies, Gdb_index::find_pubname_offset,
	Gdb_index::find_pubtype_offset, Gdb_index::pubnames_table)
	Gdb_index::pubtypes_table, Gdb_index::map_pubnames_and_types_to_dies,
	Gdb_index::map_pubtable_to_dies):
	Declare functions.
	(Gdb_index::pubnames_read): Update declaration.
	(Gdb_index::Pubname_offset_map): New type.
	(Gdb_index::cu_pubname_map_, Gdb_index::cu_pubtype_map_,
	Gdb_index::pubnames_table_, Gdb_index::pubtypes_table_,
	Gdb_index::stmt_list_offset): Declare.
	(Gdb_index::pubnames_shndx_, Gdb_index::pubnames_offet_,
	Gdb_index::pubtypes_object_, Gdb_index::pubtypes_shndx_)
	Gdb_index::pubtypes_offset_): Remove.

1 files changed, 62 insertions, 14 deletions

diff --git a/gold/gdb-index.h b/gold/gdb-index.h
index 14c1583..5d9fe47 100644
--- a/gold/gdb-index.h
+++ b/gold/gdb-index.h
@@ -42,6 +42,8 @@ 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.
@@ -91,15 +93,35 @@ class Gdb_index : public Output_section_data
   void
   add_symbol(int cu_index, const char* sym_name);
 
-  // Return TRUE if we have already processed the pubnames set for
-  // OBJECT at OFFSET in section SHNDX
-  bool
-  pubnames_read(const Relobj* object, unsigned int shndx, off_t offset);
+  // 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 pubtypes set for
-  // OBJECT at OFFSET in section SHNDX
+  // 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
-  pubtypes_read(const Relobj* object,  unsigned int shndx, off_t offset);
+  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
@@ -125,6 +147,21 @@ class Gdb_index : public Output_section_data
   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
@@ -178,6 +215,21 @@ class Gdb_index : public Output_section_data
 
   typedef std::vector<int> 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.
@@ -200,14 +252,10 @@ class Gdb_index : public Output_section_data
   off_t symtab_offset_;
   off_t cu_pool_offset_;
   off_t stringpool_offset_;
-  // Object, section index and offset of last read pubnames section.
+  // Object, stmt list offset of the CUs and TUs associated with the
+  // last read pubnames and pubtypes sections.
   const Relobj* pubnames_object_;
-  unsigned int pubnames_shndx_;
-  off_t pubnames_offset_;
-  // Object, section index and offset of last read pubtypes section.
-  const Relobj* pubtypes_object_;
-  unsigned int pubtypes_shndx_;
-  off_t pubtypes_offset_;
+  off_t stmt_list_offset_;
 };
 
 } // End namespace gold.