--- /dev/null
+// cref.cc -- cross reference for gold
+
+// Copyright 2008 Free Software Foundation, Inc.
+// Written by Ian Lance Taylor <iant@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 "gold.h"
+
+#include <cerrno>
+#include <cstdio>
+#include <cstring>
+#include <map>
+#include <string>
+#include <vector>
+
+#include "object.h"
+#include "archive.h"
+#include "cref.h"
+
+namespace gold
+{
+
+// Class Cref_inputs. This is used to hold the list of input files
+// for cross referencing.
+
+class Cref_inputs
+{
+ public:
+ Cref_inputs()
+ : objects_(), archives_(), current_(&this->objects_)
+ { }
+
+ // Add an input object file.
+ void
+ add_object(Object* object);
+
+ // Start adding an archive. We support nested archives for future
+ // flexibility.
+ void
+ add_archive_start(Archive*);
+
+ // Finish adding an archive.
+ void
+ add_archive_stop(Archive*);
+
+ // Report symbol counts.
+ void
+ print_symbol_counts(const Symbol_table*, FILE*) const;
+
+ private:
+ // A list of input objects.
+ typedef std::vector<Object*> Objects;
+
+ // Information we record for an archive.
+ struct Archive_info
+ {
+ // Archive name.
+ std::string name;
+ // List of objects included from the archive.
+ Objects* objects;
+ // Number of archive members.
+ size_t member_count;
+ };
+
+ // A mapping from the name of an archive to the list of objects in
+ // that archive.
+ typedef std::map<std::string, Archive_info> Archives;
+
+ // Report symbol counts for a list of Objects.
+ void
+ print_objects_symbol_counts(const Symbol_table*, FILE*, const Objects*) const;
+
+ // Report symbol counts for an object.
+ void
+ print_object_symbol_counts(const Symbol_table*, FILE*, const Object*) const;
+
+ // List of input objects.
+ Objects objects_;
+ // List of input archives. This is a mapping from the archive file
+ // name to the list of objects.
+ Archives archives_;
+ // The list to which we are currently adding objects.
+ Objects* current_;
+};
+
+// Add an object.
+
+void
+Cref_inputs::add_object(Object* object)
+{
+ this->current_->push_back(object);
+}
+
+// Start adding an archive.
+
+void
+Cref_inputs::add_archive_start(Archive* archive)
+{
+ gold_assert(this->current_ == &this->objects_);
+ if (this->archives_.find(archive->name()) == this->archives_.end())
+ {
+ Archive_info* pai = &this->archives_[archive->name()];
+ pai->name = archive->filename();
+ pai->objects = new Objects();
+ pai->member_count = archive->count_members();
+ }
+ this->current_ = this->archives_[archive->name()].objects;
+}
+
+// Stop adding an archive.
+
+void
+Cref_inputs::add_archive_stop(Archive*)
+{
+ gold_assert(this->current_ != &this->objects_);
+ this->current_ = &this->objects_;
+}
+
+// Report symbol counts for an object.
+
+void
+Cref_inputs::print_object_symbol_counts(const Symbol_table* symtab,
+ FILE* f,
+ const Object* object) const
+{
+ size_t defined, used;
+ object->get_global_symbol_counts(symtab, &defined, &used);
+ fprintf(f, "symbols %s %zu %zu\n", object->name().c_str(), defined, used);
+}
+
+// Report symbol counts for a list of Inputs.
+
+void
+Cref_inputs::print_objects_symbol_counts(const Symbol_table* symtab,
+ FILE* f,
+ const Objects* objects) const
+{
+ for (Objects::const_iterator p = objects->begin();
+ p != objects->end();
+ ++p)
+ this->print_object_symbol_counts(symtab, f, *p);
+}
+
+// Print symbol counts. This implements --print-symbol-counts. This
+// is intended to be easily read by a program. This outputs a series
+// of lines. There are two different types of lines.
+
+// The first is "symbols FILENAME DEFINED USED". FILENAME is the name
+// of an object file included in the link; for an archive, this will
+// be ARCHIVEFILENAME(MEMBERNAME). DEFINED is the number of symbols
+// which the object file defines. USED is the number of symbols which
+// are used in the final output; this is the number of symbols which
+// appear in the final output table as having been defined by this
+// object. These numbers will be different when weak symbols are
+// used, and they will be different for dynamic objects.
+
+// The second is "archives FILENAME MEMBERS USED". FILENAME is the
+// name of an archive file included in the link. MEMBERS is the
+// number of members of the archive. USED is the number of archive
+// members included in the link.
+
+void
+Cref_inputs::print_symbol_counts(const Symbol_table* symtab, FILE* f) const
+{
+ this->print_objects_symbol_counts(symtab, f, &this->objects_);
+ for (Archives::const_iterator p = this->archives_.begin();
+ p != this->archives_.end();
+ ++p)
+ {
+ fprintf(f, "archive %s %zu %zu\n", p->second.name.c_str(),
+ p->second.member_count, p->second.objects->size());
+ this->print_objects_symbol_counts(symtab, f, p->second.objects);
+ }
+}
+
+// Class Cref.
+
+// Make sure the Cref_inputs object has been created.
+
+void
+Cref::need_inputs()
+{
+ if (this->inputs_ == NULL)
+ this->inputs_ = new Cref_inputs();
+}
+
+// Add an input object file.
+
+void
+Cref::add_object(Object* object)
+{
+ this->need_inputs();
+ this->inputs_->add_object(object);
+}
+
+// Start adding an archive.
+
+void
+Cref::add_archive_start(Archive* archive)
+{
+ this->need_inputs();
+ this->inputs_->add_archive_start(archive);
+}
+
+// Stop adding an archive.
+
+void
+Cref::add_archive_stop(Archive* archive)
+{
+ this->inputs_->add_archive_stop(archive);
+}
+
+// Print symbol counts.
+
+void
+Cref::print_symbol_counts(const Symbol_table* symtab) const
+{
+ if (parameters->options().user_set_print_symbol_counts()
+ && this->inputs_ != NULL)
+ {
+ FILE* f;
+ if (strcmp(parameters->options().print_symbol_counts(), "-") == 0)
+ f = stdout;
+ else
+ {
+ f = fopen(parameters->options().print_symbol_counts(), "w");
+ if (f == NULL)
+ gold_error(_("cannot open symbol count file %s: %s"),
+ parameters->options().print_symbol_counts(),
+ strerror(errno));
+ }
+ if (f != NULL)
+ this->inputs_->print_symbol_counts(symtab, f);
+ }
+}
+
+} // End namespace gold.
projects / msp430-binutils.git / blobdiff