// plugin.h -- plugin manager for gold -*- C++ -*-
-// Copyright 2008, 2009, 2010 Free Software Foundation, Inc.
+// Copyright (C) 2008-2016 Free Software Foundation, Inc.
// This file is part of gold.
class General_options;
class Input_file;
class Input_objects;
+class Archive;
+class Input_group;
+class Symbol;
class Symbol_table;
class Layout;
class Dirsearch;
class Mapfile;
+class Task;
class Task_token;
class Pluginobj;
+class Plugin_rescan;
// This class represents a single plugin library.
// Call the claim-file handler.
bool
- claim_file(struct ld_plugin_input_file *plugin_input_file);
+ claim_file(struct ld_plugin_input_file* plugin_input_file);
// Call the all-symbols-read handler.
void
// Add an argument
void
- add_option(const char *arg)
+ add_option(const char* arg)
{
this->args_.push_back(arg);
}
public:
Plugin_manager(const General_options& options)
: plugins_(), objects_(), deferred_layout_objects_(), input_file_(NULL),
- plugin_input_file_(), in_replacement_phase_(false),
+ plugin_input_file_(), rescannable_(), undefined_symbols_(),
+ any_claimed_(false), in_replacement_phase_(false), any_added_(false),
+ in_claim_file_handler_(false),
options_(options), workqueue_(NULL), task_(NULL), input_objects_(NULL),
symtab_(NULL), layout_(NULL), dirpath_(NULL), mapfile_(NULL),
- this_blocker_(NULL)
+ this_blocker_(NULL), extra_search_path_(), lock_(NULL),
+ initialize_lock_(&lock_)
{ this->current_ = plugins_.end(); }
~Plugin_manager();
// Load all plugin libraries.
void
- load_plugins();
+ load_plugins(Layout* layout);
// Call the plugin claim-file handlers in turn to see if any claim the file.
Pluginobj*
- claim_file(Input_file *input_file, off_t offset, off_t filesize);
+ claim_file(Input_file* input_file, off_t offset, off_t filesize,
+ Object* elf_object);
+
+ // Get the object associated with the handle and check if it is an elf object.
+ // If it is not a Pluginobj, it is an elf object.
+ Object*
+ get_elf_object(const void* handle);
+
+ // True if the claim_file handler of the plugins is being called.
+ bool
+ in_claim_file_handler()
+ { return in_claim_file_handler_; }
+
+ // Let the plugin manager save an archive for later rescanning.
+ // This takes ownership of the Archive pointer.
+ void
+ save_archive(Archive*);
+
+ // Let the plugin manager save an input group for later rescanning.
+ // This takes ownership of the Input_group pointer.
+ void
+ save_input_group(Input_group*);
// Call the all-symbols-read handlers.
void
all_symbols_read(Workqueue* workqueue, Task* task,
Input_objects* input_objects, Symbol_table* symtab,
- Layout* layout, Dirsearch* dirpath, Mapfile* mapfile,
+ Dirsearch* dirpath, Mapfile* mapfile,
Task_token** last_blocker);
+ // Tell the plugin manager that we've a new undefined symbol which
+ // may require rescanning.
+ void
+ new_undefined_symbol(Symbol*);
+
// Run deferred layout.
void
layout_deferred_objects();
Pluginobj*
make_plugin_object(unsigned int handle);
- // Return the Pluginobj associated with the given HANDLE.
- Pluginobj*
+ // Return the object associated with the given HANDLE.
+ Object*
object(unsigned int handle) const
{
if (handle >= this->objects_.size())
// and we are still in the initial input phase.
bool
should_defer_layout() const
- { return !this->objects_.empty() && !this->in_replacement_phase_; }
+ { return this->any_claimed_ && !this->in_replacement_phase_; }
// Add a regular object to the deferred layout list. These are
// objects whose layout has been deferred until after the
// Get input file information with an open (possibly re-opened)
// file descriptor.
ld_plugin_status
- get_input_file(unsigned int handle, struct ld_plugin_input_file *file);
+ get_input_file(unsigned int handle, struct ld_plugin_input_file* file);
+
+ ld_plugin_status
+ get_view(unsigned int handle, const void **viewp);
// Release an input file.
ld_plugin_status
// Add a new input file.
ld_plugin_status
- add_input_file(char *pathname, bool is_lib);
+ add_input_file(const char* pathname, bool is_lib);
+
+ // Set the extra library path.
+ ld_plugin_status
+ set_extra_library_path(const char* path);
// Return TRUE if we are in the replacement phase.
bool
in_replacement_phase() const
{ return this->in_replacement_phase_; }
+ Input_objects*
+ input_objects() const
+ { return this->input_objects_; }
+
+ Symbol_table*
+ symtab()
+ { return this->symtab_; }
+
+ Layout*
+ layout()
+ { return this->layout_; }
+
private:
Plugin_manager(const Plugin_manager&);
Plugin_manager& operator=(const Plugin_manager&);
+ // Plugin_rescan is a Task which calls the private rescan method.
+ friend class Plugin_rescan;
+
+ // An archive or input group which may have to be rescanned if a
+ // plugin adds a new file.
+ struct Rescannable
+ {
+ bool is_archive;
+ union
+ {
+ Archive* archive;
+ Input_group* input_group;
+ } u;
+
+ Rescannable(Archive* archive)
+ : is_archive(true)
+ { this->u.archive = archive; }
+
+ Rescannable(Input_group* input_group)
+ : is_archive(false)
+ { this->u.input_group = input_group; }
+ };
+
typedef std::list<Plugin*> Plugin_list;
- typedef std::vector<Pluginobj*> Object_list;
+ typedef std::vector<Object*> Object_list;
typedef std::vector<Relobj*> Deferred_layout_list;
+ typedef std::vector<Rescannable> Rescannable_list;
+ typedef std::vector<Symbol*> Undefined_symbol_list;
+
+ // Rescan archives for undefined symbols.
+ void
+ rescan(Task*);
+
+ // See whether the rescannable at index I defines SYM.
+ bool
+ rescannable_defines(size_t i, Symbol* sym);
// The list of plugin libraries.
Plugin_list plugins_;
Input_file* input_file_;
struct ld_plugin_input_file plugin_input_file_;
- // TRUE after the all symbols read event; indicates that we are
- // processing replacement files whose symbols should replace the
+ // A list of archives and input groups being saved for possible
+ // later rescanning.
+ Rescannable_list rescannable_;
+
+ // A list of undefined symbols found in added files.
+ Undefined_symbol_list undefined_symbols_;
+
+ // Whether any input files have been claimed by a plugin.
+ bool any_claimed_;
+
+ // Set to true after the all symbols read event; indicates that we
+ // are processing replacement files whose symbols should replace the
// placeholder symbols from the Pluginobj objects.
bool in_replacement_phase_;
+ // Whether any input files or libraries were added by a plugin.
+ bool any_added_;
+
+ // Set to true when the claim_file handler of a plugin is called.
+ bool in_claim_file_handler_;
+
const General_options& options_;
Workqueue* workqueue_;
Task* task_;
Dirsearch* dirpath_;
Mapfile* mapfile_;
Task_token* this_blocker_;
+
+ // An extra directory to search for the libraries passed by
+ // add_input_library.
+ std::string extra_search_path_;
+ Lock* lock_;
+ Initialize_lock initialize_lock_;
};
// Fill in the symbol resolution status for the given plugin symbols.
ld_plugin_status
- get_symbol_resolution_info(int nsyms, ld_plugin_symbol* syms) const;
+ get_symbol_resolution_info(Symbol_table* symtab,
+ int nsyms,
+ ld_plugin_symbol* syms,
+ int version) const;
// Store the incoming symbols from the plugin for later processing.
void
filesize()
{ return this->filesize_; }
+ // Return the word size of the object file.
+ int
+ elfsize() const
+ { gold_unreachable(); }
+
+ // Return TRUE if this is a big-endian object file.
+ bool
+ is_big_endian() const
+ { gold_unreachable(); }
+
protected:
// Return TRUE if this is an object claimed by a plugin.
virtual Pluginobj*
// The number of symbols provided by the plugin.
int nsyms_;
-
+
// The symbols provided by the plugin.
const struct ld_plugin_symbol* syms_;
void
do_add_symbols(Symbol_table*, Read_symbols_data*, Layout*);
+ Archive::Should_include
+ do_should_include_member(Symbol_table* symtab, Layout*, Read_symbols_data*,
+ std::string* why);
+
+ // Iterate over global symbols, calling a visitor class V for each.
+ void
+ do_for_all_global_symbols(Read_symbols_data* sd,
+ Library_base::Symbol_visitor_base* v);
+
+ // Iterate over local symbols, calling a visitor class V for each GOT offset
+ // associated with a local symbol.
+ void
+ do_for_all_local_got_entries(Got_offset_list::Visitor* v) const;
+
// Get the size of a section.
uint64_t
do_section_size(unsigned int shndx);
// Get the name of a section.
std::string
- do_section_name(unsigned int shndx);
+ do_section_name(unsigned int shndx) const;
// Return a view of the contents of a section.
- Object::Location
- do_section_contents(unsigned int shndx);
+ const unsigned char*
+ do_section_contents(unsigned int shndx, section_size_type* plen,
+ bool cache);
// Return section flags.
uint64_t
{
public:
Plugin_hook(const General_options& options, Input_objects* input_objects,
- Symbol_table* symtab, Layout* layout, Dirsearch* dirpath,
+ Symbol_table* symtab, Layout* /*layout*/, Dirsearch* dirpath,
Mapfile* mapfile, Task_token* this_blocker,
Task_token* next_blocker)
: options_(options), input_objects_(input_objects), symtab_(symtab),
- layout_(layout), dirpath_(dirpath), mapfile_(mapfile),
+ dirpath_(dirpath), mapfile_(mapfile),
this_blocker_(this_blocker), next_blocker_(next_blocker)
{ }
const General_options& options_;
Input_objects* input_objects_;
Symbol_table* symtab_;
- Layout* layout_;
Dirsearch* dirpath_;
Mapfile* mapfile_;
Task_token* this_blocker_;
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