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author | Ian Lance Taylor <ian@airs.com> | 2008-07-22 22:08:43 +0000 |
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committer | Ian Lance Taylor <ian@airs.com> | 2008-07-22 22:08:43 +0000 |
commit | 92de84a60cbdb80b808c8571e709c1384c6ee6fc (patch) | |
tree | 850dc6691e2bef093d847da5d35241b98b04e2ea /gold/cref.cc | |
parent | 3f7c5e1d995c658ef8709e5fae244f25434db931 (diff) | |
download | fsf-binutils-gdb-92de84a60cbdb80b808c8571e709c1384c6ee6fc.zip fsf-binutils-gdb-92de84a60cbdb80b808c8571e709c1384c6ee6fc.tar.gz fsf-binutils-gdb-92de84a60cbdb80b808c8571e709c1384c6ee6fc.tar.bz2 |
* cref.cc: New file.
* cref.h: New file.
* options.h (class General_options): Add --print-symbol-counts.
* main.cc (main): Issue defined symbol report if requested.
* archive.cc (Archive::interpret_header): Make into a const member
function.
(Archive::add_symbols): Call Input_objects::archive_start and
archive_stop.
(Archive::const_iterator): Define new class.
(Archive::begin, Archive::end): New functions.
(Archive::include_all_members): Rewrite to use iterator.
(Archive::count_members): New function.
* archive.h (class Archive): Update declarations.
(Archive::filename): New function.
* object.cc: Include "cref.h".
(Sized_relobj::Sized_relobj): Initialize defined_count_.
(Sized_relobj::do_get_global_symbol_counts): New function.
(Input_objects::add_object): Add object to cross-referencer.
(Input_objects::archive_start): New function.
(Input_objects::archive_stop): New function.
(Input_objects::print_symbol_counts): New function.
* object.h: Declare Cref and Archive.
(Object::get_global_symbol_counts): New function.
(Object::do_get_global_symbol_counts): New pure virtual function.
(class Sized_relobj): Add defined_count_ field. Update
declarations.
(class Input_objects): Add cref_ field. Update constructor.
Update declarations.
* dynobj.cc (Sized_dynobj::Sized_dynobj): Initialize symbols_ and
defined_count_.
(Sized_dynobj::do_add_symbols): Allocate symbols_ if printing
symbol counts.
(Sized_dynobj::do_get_global_symbol_counts): New function.
* dynobj.h (class Sized_dynobj): Add fields symbols_ and
defined_count_. Update declarations. Define Symbols typedef.
* symtab.cc (Symbol_table::add_from_relobj): Add defined
parameter. Change all callers.
(Symbol_table::add_from_dynobj): Add sympointers and defined
parameters. Change all callers.
* symtab.h (class Symbol_table): Update declarations.
* Makefile.am (CCFILES): Add cref.cc.
(HFILES): Add cref.h.
* Makefile.in: Rebuild.
Diffstat (limited to 'gold/cref.cc')
-rw-r--r-- | gold/cref.cc | 253 |
1 files changed, 253 insertions, 0 deletions
diff --git a/gold/cref.cc b/gold/cref.cc new file mode 100644 index 0000000..ec95f36 --- /dev/null +++ b/gold/cref.cc @@ -0,0 +1,253 @@ +// 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. |