// plugin.h -- plugin manager for gold -*- C++ -*-
-// Copyright 2008 Free Software Foundation, Inc.
+// Copyright 2008, 2009, 2010 Free Software Foundation, Inc.
// Written by Cary Coutant <ccoutant@google.com>.
// This file is part of gold.
class Plugin
{
public:
- Plugin(const char* args)
+ Plugin(const char* filename)
: handle_(NULL),
- args_(args),
+ filename_(filename),
+ args_(),
claim_file_handler_(NULL),
all_symbols_read_handler_(NULL),
- cleanup_handler_(NULL)
+ cleanup_handler_(NULL),
+ cleanup_done_(false)
{ }
~Plugin()
set_cleanup_handler(ld_plugin_cleanup_handler handler)
{ this->cleanup_handler_ = handler; }
+ // Add an argument
+ void
+ add_option(const char *arg)
+ {
+ this->args_.push_back(arg);
+ }
+
private:
Plugin(const Plugin&);
Plugin& operator=(const Plugin&);
// The shared library handle returned by dlopen.
void* handle_;
// The argument string given to --plugin.
- const char* args_;
+ std::string filename_;
+ // The list of argument string given to --plugin-opt.
+ std::vector<std::string> args_;
// The plugin's event handlers.
ld_plugin_claim_file_handler claim_file_handler_;
ld_plugin_all_symbols_read_handler all_symbols_read_handler_;
ld_plugin_cleanup_handler cleanup_handler_;
+ // TRUE if the cleanup handlers have been called.
+ bool cleanup_done_;
};
// A manager class for plugins.
{
public:
Plugin_manager(const General_options& options)
- : plugins_(), in_replacement_phase_(false), options_(options),
- workqueue_(NULL), input_objects_(NULL), symtab_(NULL), layout_(NULL),
- dirpath_(NULL), mapfile_(NULL), this_blocker_(NULL)
+ : plugins_(), objects_(), deferred_layout_objects_(), input_file_(NULL),
+ plugin_input_file_(), in_replacement_phase_(false),
+ options_(options), workqueue_(NULL), task_(NULL), input_objects_(NULL),
+ symtab_(NULL), layout_(NULL), dirpath_(NULL), mapfile_(NULL),
+ this_blocker_(NULL)
{ this->current_ = plugins_.end(); }
~Plugin_manager();
// Add a plugin library.
void
- add_plugin(const char* args)
- { this->plugins_.push_back(new Plugin(args)); }
+ add_plugin(const char* filename)
+ { this->plugins_.push_back(new Plugin(filename)); }
+
+ // Add an argument to the current plugin.
+ void
+ add_plugin_option(const char* opt)
+ {
+ Plugin* last = this->plugins_.back();
+ last->add_option(opt);
+ }
// Load all plugin libraries.
void
// Call the all-symbols-read handlers.
void
- all_symbols_read(Workqueue* workqueue, Input_objects* input_objects,
- Symbol_table* symtab, Layout* layout, Dirsearch* dirpath,
- Mapfile* mapfile, Task_token** last_blocker);
+ all_symbols_read(Workqueue* workqueue, Task* task,
+ Input_objects* input_objects, Symbol_table* symtab,
+ Layout* layout, Dirsearch* dirpath, Mapfile* mapfile,
+ Task_token** last_blocker);
+
+ // Run deferred layout.
+ void
+ layout_deferred_objects();
// Call the cleanup handlers.
void
return this->objects_[handle];
}
+ // Return TRUE if any input files have been claimed by a plugin
+ // and we are still in the initial input phase.
+ bool
+ should_defer_layout() const
+ { return !this->objects_.empty() && !this->in_replacement_phase_; }
+
+ // Add a regular object to the deferred layout list. These are
+ // objects whose layout has been deferred until after the
+ // replacement files have arrived.
+ void
+ add_deferred_layout_object(Relobj* obj)
+ { this->deferred_layout_objects_.push_back(obj); }
+
+ // 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);
+
+ // Release an input file.
+ ld_plugin_status
+ release_input_file(unsigned int handle);
+
// Add a new input file.
ld_plugin_status
- add_input_file(char *pathname);
+ add_input_file(char *pathname, bool is_lib);
// Return TRUE if we are in the replacement phase.
bool
typedef std::list<Plugin*> Plugin_list;
typedef std::vector<Pluginobj*> Object_list;
+ typedef std::vector<Relobj*> Deferred_layout_list;
// The list of plugin libraries.
Plugin_list plugins_;
// serves as the "handle" that we pass to the plugins.
Object_list objects_;
+ // The list of regular objects whose layout has been deferred.
+ Deferred_layout_list deferred_layout_objects_;
+
// The file currently up for claim by the plugins.
Input_file* input_file_;
struct ld_plugin_input_file plugin_input_file_;
const General_options& options_;
Workqueue* workqueue_;
+ Task* task_;
Input_objects* input_objects_;
Symbol_table* symtab_;
Layout* layout_;
typedef std::vector<Symbol*> Symbols;
- Pluginobj(const std::string& name, Input_file* input_file, off_t offset);
+ Pluginobj(const std::string& name, Input_file* input_file, off_t offset,
+ off_t filesize);
// 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;
- // Add symbol information to the global symbol table.
- void
- add_symbols(Symbol_table* symtab, Layout* layout)
- { this->do_add_symbols(symtab, layout); }
-
// Store the incoming symbols from the plugin for later processing.
void
store_incoming_symbols(int nsyms, const struct ld_plugin_symbol* syms)
bool
include_comdat_group(std::string comdat_key, Layout* layout);
+ // Return the filename.
+ const std::string&
+ filename() const
+ { return this->input_file()->filename(); }
+
+ // Return the file descriptor.
+ int
+ descriptor()
+ { return this->input_file()->file().descriptor(); }
+
+ // Return the size of the file or archive member.
+ off_t
+ filesize()
+ { return this->filesize_; }
+
protected:
// Return TRUE if this is an object claimed by a plugin.
virtual Pluginobj*
do_pluginobj()
{ return this; }
- // Add symbol information to the global symbol table--implemented by
- // child class.
- virtual void
- do_add_symbols(Symbol_table*, Layout*) = 0;
-
// The number of symbols provided by the plugin.
int nsyms_;
Symbols symbols_;
private:
+ // Size of the file (or archive member).
+ off_t filesize_;
// Map a comdat key symbol to a boolean indicating whether the comdat
// group in this object with that key should be kept.
typedef Unordered_map<std::string, bool> Comdat_map;
{
public:
Sized_pluginobj(const std::string& name, Input_file* input_file,
- off_t offset);
+ off_t offset, off_t filesize);
// Read the symbols.
void
// Add the symbols to the symbol table.
void
- do_add_symbols(Symbol_table*, Read_symbols_data*);
+ do_add_symbols(Symbol_table*, Read_symbols_data*, Layout*);
- void
- do_add_symbols(Symbol_table*, Layout*);
+ Archive::Should_include
+ do_should_include_member(Symbol_table* symtab, Read_symbols_data*,
+ std::string* why);
// Get the size of a section.
uint64_t
uint64_t
do_section_flags(unsigned int shndx);
+ // Return section entsize.
+ uint64_t
+ do_section_entsize(unsigned int shndx);
+
// Return section address.
uint64_t
do_section_address(unsigned int shndx);
void
do_get_global_symbol_counts(const Symbol_table*, size_t*, size_t*) const;
+ // Get global symbols.
+ const Symbols*
+ do_get_global_symbols() const;
+
// Add placeholder symbols from a claimed file.
ld_plugin_status
add_symbols_from_plugin(int nsyms, const ld_plugin_symbol* syms);
private:
};
-// 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_plugin_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_plugin_symbols(Symbol_table* symtab,
- Layout* layout,
- Pluginobj* obj,
- Task_token* this_blocker,
- Task_token* next_blocker)
- : symtab_(symtab), layout_(layout), obj_(obj),
- this_blocker_(this_blocker), next_blocker_(next_blocker)
- { }
-
- ~Add_plugin_symbols();
-
- // The standard Task methods.
-
- Task_token*
- is_runnable();
-
- void
- locks(Task_locker*);
-
- void
- run(Workqueue*);
-
- std::string
- get_name() const
- { return "Add_plugin_symbols " + this->obj_->name(); }
-
-private:
- Symbol_table* symtab_;
- Layout* layout_;
- Pluginobj* obj_;
- Task_token* this_blocker_;
- Task_token* next_blocker_;
-};
-
// This Task handles handles the "all symbols read" event hook.
// The plugin may add additional input files at this time, which must
// be queued for reading.
{ return "Plugin_hook"; }
private:
- // Call the plugin hook.
- void
- do_plugin_hook(Workqueue*);
-
const General_options& options_;
Input_objects* input_objects_;
Symbol_table* symtab_;
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