Don't emit symbols seen only in dynamic object, don't read duplicate

dynamic object.

gold/dynobj.cc

@@ -1324,12 +1324,12 @@ Versions::finalize(const Target* target, Symbol_table* symtab,
       // Create a version symbol if necessary.
       if (!(*p)->is_symbol_created())
 	{
-	  Symbol* vsym =symtab->define_as_constant(target, (*p)->name(),
-						   (*p)->name(), 0, 0,
-						   elfcpp::STT_OBJECT,
-						   elfcpp::STB_GLOBAL,
-						   elfcpp::STV_DEFAULT, 0,
-						   false);
+	  Symbol* vsym = symtab->define_as_constant(target, (*p)->name(),
+						    (*p)->name(), 0, 0,
+						    elfcpp::STT_OBJECT,
+						    elfcpp::STB_GLOBAL,
+						    elfcpp::STV_DEFAULT, 0,
+						    false);
 	  vsym->set_needs_dynsym_entry();
 	  ++dynsym_index;
 	  syms->push_back(vsym);

gold/object.cc

@@ -718,15 +718,29 @@ Sized_relobj<size, big_endian>::write_local_symbols(Output_file* of,
 
 // Input_objects methods.
 
-// Add a regular relocatable object to the list.
+// Add a regular relocatable object to the list.  Return false if this
+// object should be ignored.
 
-void
+bool
 Input_objects::add_object(Object* obj)
 {
-  if (obj->is_dynamic())
-    this->dynobj_list_.push_back(static_cast<Dynobj*>(obj));
-  else
+  if (!obj->is_dynamic())
     this->relobj_list_.push_back(static_cast<Relobj*>(obj));
+  else
+    {
+      // See if this is a duplicate SONAME.
+      Dynobj* dynobj = static_cast<Dynobj*>(obj);
+
+      std::pair<Unordered_set<std::string>::iterator, bool> ins =
+	this->sonames_.insert(dynobj->soname());
+      if (!ins.second)
+	{
+	  // We have already seen a dynamic object with this soname.
+	  return false;
+	}
+
+      this->dynobj_list_.push_back(dynobj);
+    }
 
   Target* target = obj->target();
   if (this->target_ == NULL)
@@ -737,6 +751,8 @@ Input_objects::add_object(Object* obj)
 	      program_name, obj->name().c_str());
       gold_exit(false);
     }
+
+  return true;
 }
 
 // Relocate_info methods.

gold/object.h

@@ -600,7 +600,7 @@ class Input_objects
 {
  public:
   Input_objects()
-    : relobj_list_(), target_(NULL)
+    : relobj_list_(), dynobj_list_(), target_(NULL), sonames_()
   { }
 
   // The type of the list of input relocateable objects.
@@ -611,8 +611,9 @@ class Input_objects
   typedef std::vector<Dynobj*> Dynobj_list;
   typedef Dynobj_list::const_iterator Dynobj_iterator;
 
-  // Add an object to the list.
-  void
+  // Add an object to the list.  Return true if all is well, or false
+  // if this object should be ignored.
+  bool
   add_object(Object*);
 
   // Get the target we should use for the output file.
@@ -649,9 +650,14 @@ class Input_objects
   Input_objects(const Input_objects&);
   Input_objects& operator=(const Input_objects&);
 
+  // The list of ordinary objects included in the link.
   Relobj_list relobj_list_;
+  // The list of dynamic objects included in the link.
   Dynobj_list dynobj_list_;
+  // The target.
   Target* target_;
+  // SONAMEs that we have seen.
+  Unordered_set<std::string> sonames_;
 };
 
 // Some of the information we pass to the relocation routines.  We

gold/po/gold.pot

@@ -8,7 +8,7 @@ msgid ""
 msgstr ""
 "Project-Id-Version: PACKAGE VERSION\n"
 "Report-Msgid-Bugs-To: \n"
-"POT-Creation-Date: 2006-12-05 15:53-0800\n"
+"POT-Creation-Date: 2006-12-05 17:51-0800\n"
 "PO-Revision-Date: YEAR-MO-DA HO:MI+ZONE\n"
 "Last-Translator: FULL NAME <EMAIL@ADDRESS>\n"
 "Language-Team: LANGUAGE <LL@li.org>\n"
@@ -166,7 +166,7 @@ msgstr ""
 msgid "%s: %s: size of dynamic symbols is not multiple of symbol size\n"
 msgstr ""
 
-#: dynobj.cc:1240
+#: dynobj.cc:1241
 #, c-format
 msgid "%s: symbol %s has undefined version %s\n"
 msgstr ""
@@ -360,42 +360,42 @@ msgstr ""
 msgid "%s: %s: local symbol %u section name out of range: %u >= %u\n"
 msgstr ""
 
-#: object.cc:799
+#: object.cc:815
 #, c-format
 msgid "%s: %s: unsupported ELF file type %d\n"
 msgstr ""
 
-#: object.cc:818 object.cc:871 object.cc:892
+#: object.cc:834 object.cc:887 object.cc:908
 #, c-format
 msgid "%s: %s: ELF file too short\n"
 msgstr ""
 
-#: object.cc:827
+#: object.cc:843
 #, c-format
 msgid "%s: %s: invalid ELF version 0\n"
 msgstr ""
 
-#: object.cc:830
+#: object.cc:846
 #, c-format
 msgid "%s: %s: unsupported ELF version %d\n"
 msgstr ""
 
-#: object.cc:838
+#: object.cc:854
 #, c-format
 msgid "%s: %s: invalid ELF class 0\n"
 msgstr ""
 
-#: object.cc:845
+#: object.cc:861
 #, c-format
 msgid "%s: %s: unsupported ELF class %d\n"
 msgstr ""
 
-#: object.cc:853
+#: object.cc:869
 #, c-format
 msgid "%s: %s: invalid ELF data encoding\n"
 msgstr ""
 
-#: object.cc:860
+#: object.cc:876
 #, c-format
 msgid "%s: %s: unsupported ELF data encoding %d\n"
 msgstr ""
@@ -592,42 +592,42 @@ msgstr ""
 msgid "%s: %s: unsupported symbol binding %d for symbol %s\n"
 msgstr ""
 
-#: symtab.cc:445 symtab.cc:542
+#: symtab.cc:450 symtab.cc:547
 #, c-format
 msgid "%s: %s: mixing 32-bit and 64-bit ELF objects\n"
 msgstr ""
 
-#: symtab.cc:462
+#: symtab.cc:467
 #, c-format
 msgid "%s: %s: bad global symbol name offset %u at %lu\n"
 msgstr ""
 
-#: symtab.cc:549
+#: symtab.cc:554
 #, c-format
 msgid "%s: %s: too few symbol versions\n"
 msgstr ""
 
-#: symtab.cc:569
+#: symtab.cc:574
 #, c-format
 msgid "%s: %s: bad symbol name offset %u at %lu\n"
 msgstr ""
 
-#: symtab.cc:613
+#: symtab.cc:618
 #, c-format
 msgid "%s: %s: versym for symbol %zu out of range: %u\n"
 msgstr ""
 
-#: symtab.cc:621
+#: symtab.cc:626
 #, c-format
 msgid "%s: %s: versym for symbol %zu has no name: %u\n"
 msgstr ""
 
-#: symtab.cc:1093 symtab.cc:1265
+#: symtab.cc:1106 symtab.cc:1278
 #, c-format
 msgid "%s: %s: unsupported symbol section 0x%x\n"
 msgstr ""
 
-#: symtab.cc:1458
+#: symtab.cc:1471
 #, c-format
 msgid "%s: %s: warning: %s\n"
 msgstr ""

gold/readsyms.cc

@@ -240,10 +240,17 @@ Add_symbols::locks(Workqueue* workqueue)
 void
 Add_symbols::run(Workqueue*)
 {
-  this->input_objects_->add_object(this->object_);
-  this->object_->layout(this->options_, this->symtab_, this->layout_,
-			this->sd_);
-  this->object_->add_symbols(this->symtab_, this->sd_);
+  if (!this->input_objects_->add_object(this->object_))
+    {
+      // FIXME: We need to close the descriptor here.
+      delete this->object_;
+    }
+  else
+    {
+      this->object_->layout(this->options_, this->symtab_, this->layout_,
+			    this->sd_);
+      this->object_->add_symbols(this->symtab_, this->sd_);
+    }
   delete this->sd_;
   this->sd_ = NULL;
 }

gold/resolve.cc

@@ -156,7 +156,12 @@ Symbol_table::resolve(Sized_symbol<size>* to,
       gold_exit(false);
     }
 
-  if (object->is_dynamic())
+  if (!object->is_dynamic())
+    {
+      // Record that we've seen this symbol in a regular object.
+      to->set_in_reg();
+    }
+  else
     {
       frombits |= (1 << 1);
 

gold/symtab.cc

@@ -39,6 +39,7 @@ Symbol::init_fields(const char* name, const char* version,
   this->is_def_ = false;
   this->is_forwarder_ = false;
   this->needs_dynsym_entry_ = false;
+  this->in_reg_ = false;
   this->in_dyn_ = false;
   this->has_got_offset_ = false;
   this->has_warning_ = false;
@@ -57,6 +58,7 @@ Symbol::init_base(const char* name, const char* version, Object* object,
   // FIXME: Handle SHN_XINDEX.
   this->u_.from_object.shndx = sym.get_st_shndx();
   this->source_ = FROM_OBJECT;
+  this->in_reg_ = !object->is_dynamic();
   this->in_dyn_ = object->is_dynamic();
 }
 
@@ -72,6 +74,7 @@ Symbol::init_base(const char* name, Output_data* od, elfcpp::STT type,
   this->u_.in_output_data.output_data = od;
   this->u_.in_output_data.offset_is_from_end = offset_is_from_end;
   this->source_ = IN_OUTPUT_DATA;
+  this->in_reg_ = true;
 }
 
 // Initialize the fields in the base class Symbol for a symbol defined
@@ -86,6 +89,7 @@ Symbol::init_base(const char* name, Output_segment* os, elfcpp::STT type,
   this->u_.in_output_segment.output_segment = os;
   this->u_.in_output_segment.offset_base = offset_base;
   this->source_ = IN_OUTPUT_SEGMENT;
+  this->in_reg_ = true;
 }
 
 // Initialize the fields in the base class Symbol for a symbol defined
@@ -98,6 +102,7 @@ Symbol::init_base(const char* name, elfcpp::STT type,
 {
   this->init_fields(name, NULL, type, binding, visibility, nonvis);
   this->source_ = CONSTANT;
+  this->in_reg_ = true;
 }
 
 // Initialize the fields in Sized_symbol for SYM in OBJECT.
@@ -1078,6 +1083,14 @@ Symbol_table::sized_finalize(unsigned index, off_t off, Stringpool* pool)
       if (sym->has_symtab_index())
 	continue;
 
+      if (!sym->in_reg())
+	{
+	  gold_assert(!sym->has_symtab_index());
+	  sym->set_symtab_index(-1U);
+	  gold_assert(sym->dynsym_index() == -1U);
+	  continue;
+	}
+
       typename Sized_symbol<size>::Value_type value;
 
       switch (sym->source())

gold/symtab.h

@@ -185,6 +185,16 @@ class Symbol
   set_needs_dynsym_entry()
   { this->needs_dynsym_entry_ = true; }
 
+  // Return whether this symbol has been seen in a regular object.
+  bool
+  in_reg() const
+  { return this->in_reg_; }
+
+  // Mark this symbol as having been seen in a regular object.
+  void
+  set_in_reg()
+  { this->in_reg_ = true; }
+
   // Mark this symbol as having been seen in a dynamic object.
   void
   set_in_dyn()
@@ -469,6 +479,8 @@ class Symbol
   bool is_forwarder_ : 1;
   // True if this symbol needs to be in the dynamic symbol table.
   bool needs_dynsym_entry_ : 1;
+  // True if we've seen this symbol in a regular object.
+  bool in_reg_ : 1;
   // True if we've seen this symbol in a dynamic object.
   bool in_dyn_ : 1;
   // True if the symbol has an entry in the GOT section.