/* Program and address space management, for GDB, the GNU debugger.
- Copyright (C) 2009-2019 Free Software Foundation, Inc.
+ Copyright (C) 2009-2020 Free Software Foundation, Inc.
This file is part of GDB.
#define PROGSPACE_H
#include "target.h"
-#include "gdbsupport/vec.h"
#include "gdb_bfd.h"
#include "gdbsupport/gdb_vecs.h"
#include "registry.h"
#include "gdbsupport/next-iterator.h"
#include "gdbsupport/safe-iterator.h"
+#include <list>
struct target_ops;
struct bfd;
struct program_space_data;
struct address_space_data;
+typedef std::list<std::shared_ptr<objfile>> objfile_list;
+
+/* An iterator that wraps an iterator over std::shared_ptr<objfile>,
+ and dereferences the returned object. This is useful for iterating
+ over a list of shared pointers and returning raw pointers -- which
+ helped avoid touching a lot of code when changing how objfiles are
+ managed. */
+
+class unwrapping_objfile_iterator
+{
+public:
+
+ typedef unwrapping_objfile_iterator self_type;
+ typedef typename ::objfile *value_type;
+ typedef typename ::objfile &reference;
+ typedef typename ::objfile **pointer;
+ typedef typename objfile_list::iterator::iterator_category iterator_category;
+ typedef typename objfile_list::iterator::difference_type difference_type;
+
+ unwrapping_objfile_iterator (const objfile_list::iterator &iter)
+ : m_iter (iter)
+ {
+ }
+
+ objfile *operator* () const
+ {
+ return m_iter->get ();
+ }
+
+ unwrapping_objfile_iterator operator++ ()
+ {
+ ++m_iter;
+ return *this;
+ }
+
+ bool operator!= (const unwrapping_objfile_iterator &other) const
+ {
+ return m_iter != other.m_iter;
+ }
+
+private:
+
+ /* The underlying iterator. */
+ objfile_list::iterator m_iter;
+};
+
+
+/* A range that returns unwrapping_objfile_iterators. */
+
+struct unwrapping_objfile_range
+{
+ typedef unwrapping_objfile_iterator iterator;
+
+ unwrapping_objfile_range (objfile_list &ol)
+ : m_list (ol)
+ {
+ }
+
+ iterator begin () const
+ {
+ return iterator (m_list.begin ());
+ }
+
+ iterator end () const
+ {
+ return iterator (m_list.end ());
+ }
+
+private:
+
+ objfile_list &m_list;
+};
+
/* A program space represents a symbolic view of an address space.
Roughly speaking, it holds all the data associated with a
non-running-yet program (main executable, main symbols), and when
struct program_space
{
- program_space (address_space *aspace_);
+ /* Constructs a new empty program space, binds it to ASPACE, and
+ adds it to the program space list. */
+ explicit program_space (address_space *aspace);
+
+ /* Releases a program space, and all its contents (shared libraries,
+ objfiles, and any other references to the program space in other
+ modules). It is an internal error to call this when the program
+ space is the current program space, since there should always be
+ a program space. */
~program_space ();
- typedef next_adapter<struct objfile> objfiles_range;
+ typedef unwrapping_objfile_range objfiles_range;
- /* Return an iterarable object that can be used to iterate over all
+ /* Return an iterable object that can be used to iterate over all
objfiles. The basic use is in a foreach, like:
for (objfile *objf : pspace->objfiles ()) { ... } */
objfiles_range objfiles ()
{
- return objfiles_range (objfiles_head);
+ return unwrapping_objfile_range (objfiles_list);
}
- typedef next_adapter<struct objfile,
- basic_safe_iterator<next_iterator<objfile>>>
- objfiles_safe_range;
+ typedef basic_safe_range<objfiles_range> objfiles_safe_range;
/* An iterable object that can be used to iterate over all objfiles.
The basic use is in a foreach, like:
deleted during iteration. */
objfiles_safe_range objfiles_safe ()
{
- return objfiles_safe_range (objfiles_head);
+ return objfiles_safe_range (objfiles_list);
+ }
+
+ /* Add OBJFILE to the list of objfiles, putting it just before
+ BEFORE. If BEFORE is nullptr, it will go at the end of the
+ list. */
+ void add_objfile (std::shared_ptr<objfile> &&objfile,
+ struct objfile *before);
+
+ /* Remove OBJFILE from the list of objfiles. */
+ void remove_objfile (struct objfile *objfile);
+
+ /* Return true if there is more than one object file loaded; false
+ otherwise. */
+ bool multi_objfile_p () const
+ {
+ return objfiles_list.size () > 1;
}
+ /* Free all the objfiles associated with this program space. */
+ void free_all_objfiles ();
+
+
/* Pointer to next in linked list. */
struct program_space *next = NULL;
(e.g. the argument to the "symbol-file" or "file" command). */
struct objfile *symfile_object_file = NULL;
- /* All known objfiles are kept in a linked list. This points to
- the head of this list. */
- struct objfile *objfiles_head = NULL;
+ /* All known objfiles are kept in a linked list. */
+ std::list<std::shared_ptr<objfile>> objfiles_list;
/* The set of target sections matching the sections mapped into
this program space. Managed by both exec_ops and solib.c. */
#define symfile_objfile current_program_space->symfile_object_file
-/* All known objfiles are kept in a linked list. This points to the
- root of this list. */
-#define object_files current_program_space->objfiles_head
-
/* The set of target sections matching the sections mapped into the
current program space. */
#define current_target_sections (¤t_program_space->target_sections)
#define ALL_PSPACES(pspace) \
for ((pspace) = program_spaces; (pspace) != NULL; (pspace) = (pspace)->next)
-/* Remove a program space from the program spaces list and release it. It is
- an error to call this function while PSPACE is the current program space. */
-extern void delete_program_space (struct program_space *pspace);
-
/* Returns the number of program spaces listed. */
extern int number_of_program_spaces (void);
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