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Diffstat (limited to 'binutils-2.25/gold/readsyms.h')
| -rw-r--r-- | binutils-2.25/gold/readsyms.h | 492 |
1 files changed, 492 insertions, 0 deletions
diff --git a/binutils-2.25/gold/readsyms.h b/binutils-2.25/gold/readsyms.h new file mode 100644 index 00000000..99b2b164 --- /dev/null +++ b/binutils-2.25/gold/readsyms.h @@ -0,0 +1,492 @@ +// readsyms.h -- read input file symbols for gold -*- C++ -*- + +// Copyright 2006, 2007, 2008, 2009, 2010, 2011, 2013 +// 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. + +#ifndef GOLD_READSYMS_H +#define GOLD_READSYMS_H + +#include <vector> + +#include "workqueue.h" +#include "object.h" +#include "incremental.h" + +namespace gold +{ + +class Input_objects; +class Symbol_table; +class Input_group; +class Archive; +class Finish_group; + +// This Task is responsible for reading the symbols from an input +// file. This also includes reading the relocations so that we can +// check for any that require a PLT and/or a GOT. After the data has +// been read, this queues up another task to actually add the symbols +// to the symbol table. The tasks are separated because the file +// reading can occur in parallel but adding the symbols must be done +// in the order of the input files. + +class Read_symbols : public Task +{ + public: + // DIRPATH is the list of directories to search for libraries. + // INPUT is the file to read. INPUT_GROUP is not NULL if we are in + // the middle of an input group. THIS_BLOCKER is used to prevent + // the associated Add_symbols task from running before the previous + // one has completed; it will be NULL for the first task. + // NEXT_BLOCKER is used to block the next input file from adding + // symbols. + Read_symbols(Input_objects* input_objects, Symbol_table* symtab, + Layout* layout, Dirsearch* dirpath, int dirindex, + Mapfile* mapfile, const Input_argument* input_argument, + Input_group* input_group, Archive_member* member, + Task_token* this_blocker, Task_token* next_blocker) + : input_objects_(input_objects), symtab_(symtab), layout_(layout), + dirpath_(dirpath), dirindex_(dirindex), mapfile_(mapfile), + input_argument_(input_argument), input_group_(input_group), + member_(member), this_blocker_(this_blocker), + next_blocker_(next_blocker) + { } + + ~Read_symbols(); + + // If appropriate, issue a warning about skipping an incompatible + // object. + static void + incompatible_warning(const Input_argument*, const Input_file*); + + // Requeue a Read_symbols task to search for the next object with + // the same name. + static void + requeue(Workqueue*, Input_objects*, Symbol_table*, Layout*, Dirsearch*, + int dirindex, Mapfile*, const Input_argument*, Input_group*, + Task_token* next_blocker); + + // The standard Task methods. + + Task_token* + is_runnable(); + + void + locks(Task_locker*); + + void + run(Workqueue*); + + std::string + get_name() const; + + private: + // Handle an archive group. + void + do_group(Workqueue*); + + // Handle --start-lib ... --end-lib + bool + do_lib_group(Workqueue*); + + // Handle --whole-archive --start-lib ... --end-lib --no-whole-archive + bool + do_whole_lib_group(Workqueue*); + + // Open and identify the file. + bool + do_read_symbols(Workqueue*); + + Input_objects* input_objects_; + Symbol_table* symtab_; + Layout* layout_; + Dirsearch* dirpath_; + int dirindex_; + Mapfile* mapfile_; + const Input_argument* input_argument_; + Input_group* input_group_; + Archive_member* member_; + Task_token* this_blocker_; + Task_token* next_blocker_; +}; + +// This Task handles adding the symbols to the symbol table. These +// tasks must be run in the same order as the arguments appear on the +// command line. + +class Add_symbols : public Task +{ + public: + // THIS_BLOCKER is used to prevent this task from running before the + // one for the previous input file. NEXT_BLOCKER is used to prevent + // the next task from running. + Add_symbols(Input_objects* input_objects, Symbol_table* symtab, + Layout* layout, Dirsearch* /*dirpath*/, int /*dirindex*/, + Mapfile* /*mapfile*/, const Input_argument* input_argument, + Object* object, Incremental_library* library, + Read_symbols_data* sd, Task_token* this_blocker, + Task_token* next_blocker) + : input_objects_(input_objects), symtab_(symtab), layout_(layout), + input_argument_(input_argument), object_(object), library_(library), + sd_(sd), this_blocker_(this_blocker), next_blocker_(next_blocker) + { } + + ~Add_symbols(); + + // The standard Task methods. + + Task_token* + is_runnable(); + + void + locks(Task_locker*); + + void + run(Workqueue*); + + std::string + get_name() const + { return "Add_symbols " + this->object_->name(); } + +private: + Input_objects* input_objects_; + Symbol_table* symtab_; + Layout* layout_; + const Input_argument* input_argument_; + Object* object_; + Incremental_library* library_; + Read_symbols_data* sd_; + Task_token* this_blocker_; + Task_token* next_blocker_; +}; + +// This Task is responsible for reading the symbols from an archive +// member that has changed since the last incremental link. + +class Read_member : public Task +{ + public: + // INPUT is the file to read. INPUT_GROUP is not NULL if we are in + // the middle of an input group. THIS_BLOCKER is used to prevent + // the associated Add_symbols task from running before the previous + // one has completed; it will be NULL for the first task. + // NEXT_BLOCKER is used to block the next input file from adding + // symbols. + Read_member(Input_objects* /*input_objects*/, Symbol_table* /*symtab*/, + Layout* /*layout*/, Mapfile* /*mapfile*/, + const Incremental_binary::Input_reader* input_reader, + Task_token* this_blocker, Task_token* next_blocker) + : input_reader_(input_reader), + this_blocker_(this_blocker), next_blocker_(next_blocker) + { } + + ~Read_member(); + + // The standard Task methods. + + Task_token* + is_runnable(); + + void + locks(Task_locker*); + + void + run(Workqueue*); + + std::string + get_name() const + { + return (std::string("Read_member ") + this->input_reader_->filename()); + } + + private: + const Incremental_binary::Input_reader* input_reader_; + Task_token* this_blocker_; + Task_token* next_blocker_; +}; + +// This Task is responsible for processing an input script file that has +// not changed since the last incremental link. + +class Check_script : public Task +{ + public: + Check_script(Layout* layout, Incremental_binary* ibase, + unsigned int input_file_index, + const Incremental_binary::Input_reader* input_reader, + Task_token* this_blocker, Task_token* next_blocker) + : layout_(layout), ibase_(ibase), input_file_index_(input_file_index), + input_reader_(input_reader), this_blocker_(this_blocker), + next_blocker_(next_blocker) + { + this->filename_ = std::string(this->input_reader_->filename()); + } + + ~Check_script(); + + // The standard Task methods. + + Task_token* + is_runnable(); + + void + locks(Task_locker*); + + void + run(Workqueue*); + + std::string + get_name() const + { + return (std::string("Check_script ") + this->input_reader_->filename()); + } + + private: + std::string filename_; + Layout* layout_; + Incremental_binary* ibase_; + unsigned int input_file_index_; + const Incremental_binary::Input_reader* input_reader_; + Task_token* this_blocker_; + Task_token* next_blocker_; +}; + +// This Task is responsible for processing an archive library that has +// not changed since the last incremental link. + +class Check_library : public Task +{ + public: + Check_library(Symbol_table* /*symtab*/, Layout* layout, + Incremental_binary* ibase, + unsigned int input_file_index, + const Incremental_binary::Input_reader* input_reader, + Task_token* this_blocker, Task_token* next_blocker) + : layout_(layout), ibase_(ibase), + input_file_index_(input_file_index), input_reader_(input_reader), + this_blocker_(this_blocker), next_blocker_(next_blocker) + { } + + ~Check_library(); + + // The standard Task methods. + + Task_token* + is_runnable(); + + void + locks(Task_locker*); + + void + run(Workqueue*); + + std::string + get_name() const + { + return (std::string("Check_library ") + this->input_reader_->filename()); + } + + private: + Layout* layout_; + Incremental_binary* ibase_; + unsigned int input_file_index_; + const Incremental_binary::Input_reader* input_reader_; + Task_token* this_blocker_; + Task_token* next_blocker_; +}; + +// This class is used to track the archives in a group. + +class Input_group +{ + public: + typedef std::vector<Archive*> Archives; + typedef Archives::const_iterator const_iterator; + + Input_group() + : archives_() + { } + + ~Input_group(); + + // Add an archive to the group. + void + add_archive(Archive* arch) + { this->archives_.push_back(arch); } + + // Loop over the archives in the group. + + const_iterator + begin() const + { return this->archives_.begin(); } + + const_iterator + end() const + { return this->archives_.end(); } + + private: + Archives archives_; +}; + +// This class starts the handling of a group. It exists only to pick +// up the number of undefined symbols at that point, so that we only +// run back through the group if we saw a new undefined symbol. + +class Start_group : public Task +{ + public: + Start_group(Symbol_table* symtab, Finish_group* finish_group, + Task_token* this_blocker, Task_token* next_blocker) + : symtab_(symtab), finish_group_(finish_group), + this_blocker_(this_blocker), next_blocker_(next_blocker) + { } + + ~Start_group(); + + // The standard Task methods. + + Task_token* + is_runnable(); + + void + locks(Task_locker*); + + void + run(Workqueue*); + + std::string + get_name() const + { return "Start_group"; } + + private: + Symbol_table* symtab_; + Finish_group* finish_group_; + Task_token* this_blocker_; + Task_token* next_blocker_; +}; + +// This class is used to finish up handling a group. It is just a +// closure. + +class Finish_group : public Task +{ + public: + Finish_group(Input_objects* input_objects, Symbol_table* symtab, + Layout* layout, Mapfile* mapfile, Input_group* input_group, + Task_token* next_blocker) + : input_objects_(input_objects), symtab_(symtab), + layout_(layout), mapfile_(mapfile), input_group_(input_group), + saw_undefined_(0), this_blocker_(NULL), next_blocker_(next_blocker) + { } + + ~Finish_group(); + + // Set the number of undefined symbols when we start processing the + // group. This is called by the Start_group task. + void + set_saw_undefined(size_t saw_undefined) + { this->saw_undefined_ = saw_undefined; } + + // Set the blocker to use for this task. + void + set_blocker(Task_token* this_blocker) + { + gold_assert(this->this_blocker_ == NULL); + this->this_blocker_ = this_blocker; + } + + // The standard Task methods. + + Task_token* + is_runnable(); + + void + locks(Task_locker*); + + void + run(Workqueue*); + + std::string + get_name() const + { return "Finish_group"; } + + private: + Input_objects* input_objects_; + Symbol_table* symtab_; + Layout* layout_; + Mapfile* mapfile_; + Input_group* input_group_; + size_t saw_undefined_; + Task_token* this_blocker_; + Task_token* next_blocker_; +}; + +// This class is used to read a file which was not recognized as an +// object or archive. It tries to read it as a linker script, using +// the tokens to serialize with the calls to Add_symbols. + +class Read_script : public Task +{ + public: + Read_script(Symbol_table* symtab, Layout* layout, Dirsearch* dirpath, + int dirindex, Input_objects* input_objects, Mapfile* mapfile, + Input_group* input_group, const Input_argument* input_argument, + Input_file* input_file, Task_token* this_blocker, + Task_token* next_blocker) + : symtab_(symtab), layout_(layout), dirpath_(dirpath), dirindex_(dirindex), + input_objects_(input_objects), mapfile_(mapfile), + input_group_(input_group), input_argument_(input_argument), + input_file_(input_file), this_blocker_(this_blocker), + next_blocker_(next_blocker) + { } + + ~Read_script(); + + // The standard Task methods. + + Task_token* + is_runnable(); + + void + locks(Task_locker*); + + void + run(Workqueue*); + + std::string + get_name() const; + + private: + Symbol_table* symtab_; + Layout* layout_; + Dirsearch* dirpath_; + int dirindex_; + Input_objects* input_objects_; + Mapfile* mapfile_; + Input_group* input_group_; + const Input_argument* input_argument_; + Input_file* input_file_; + Task_token* this_blocker_; + Task_token* next_blocker_; +}; + +} // end namespace gold + +#endif // !defined(GOLD_READSYMS_H) |