/* Program and address space management, for GDB, the GNU debugger.
- Copyright (C) 2009-2017 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 "vec.h"
-#include "gdb_vecs.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>
+#include <vector>
struct target_ops;
struct bfd;
struct address_space;
struct program_space_data;
struct address_space_data;
+struct so_list;
-typedef struct so_list *so_list_ptr;
-DEF_VEC_P (so_list_ptr);
+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
/* The program space structure. */
struct program_space
+{
+ /* 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 unwrapping_objfile_range objfiles_range;
+
+ /* 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 ()
{
- /* Pointer to next in linked list. */
- struct program_space *next;
-
- /* Unique ID number. */
- int num;
-
- /* The main executable loaded into this program space. This is
- managed by the exec target. */
-
- /* The BFD handle for the main executable. */
- bfd *ebfd;
- /* The last-modified time, from when the exec was brought in. */
- long ebfd_mtime;
- /* Similar to bfd_get_filename (exec_bfd) but in original form given
- by user, without symbolic links and pathname resolved.
- It needs to be freed by xfree. It is not NULL iff EBFD is not NULL. */
- char *pspace_exec_filename;
-
- /* The address space attached to this program space. More than one
- program space may be bound to the same address space. In the
- traditional unix-like debugging scenario, this will usually
- match the address space bound to the inferior, and is mostly
- used by the breakpoints module for address matches. If the
- target shares a program space for all inferiors and breakpoints
- are global, then this field is ignored (we don't currently
- support inferiors sharing a program space if the target doesn't
- make breakpoints global). */
- struct address_space *aspace;
-
- /* True if this program space's section offsets don't yet represent
- the final offsets of the "live" address space (that is, the
- section addresses still require the relocation offsets to be
- applied, and hence we can't trust the section addresses for
- anything that pokes at live memory). E.g., for qOffsets
- targets, or for PIE executables, until we connect and ask the
- target for the final relocation offsets, the symbols we've used
- to set breakpoints point at the wrong addresses. */
- int executing_startup;
-
- /* True if no breakpoints should be inserted in this program
- space. */
- int breakpoints_not_allowed;
-
- /* The object file that the main symbol table was loaded from
- (e.g. the argument to the "symbol-file" or "file" command). */
- struct objfile *symfile_object_file;
-
- /* All known objfiles are kept in a linked list. This points to
- the head of this list. */
- struct objfile *objfiles;
-
- /* The set of target sections matching the sections mapped into
- this program space. Managed by both exec_ops and solib.c. */
- struct target_section_table target_sections;
-
- /* List of shared objects mapped into this space. Managed by
- solib.c. */
- struct so_list *so_list;
-
- /* Number of calls to solib_add. */
- unsigned solib_add_generation;
-
- /* When an solib is added, it is also added to this vector. This
- is so we can properly report solib changes to the user. */
- VEC (so_list_ptr) *added_solibs;
-
- /* When an solib is removed, its name is added to this vector.
- This is so we can properly report solib changes to the user. */
- VEC (char_ptr) *deleted_solibs;
-
- /* Per pspace data-pointers required by other GDB modules. */
- REGISTRY_FIELDS;
- };
+ return unwrapping_objfile_range (objfiles_list);
+ }
+
+ 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:
+
+ for (objfile *objf : pspace->objfiles_safe ()) { ... }
+
+ This variant uses a basic_safe_iterator so that objfiles can be
+ deleted during iteration. */
+ objfiles_safe_range objfiles_safe ()
+ {
+ 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 ();
+
+ /* Return a range adapter for iterating over all the solibs in this
+ program space. Use it like:
+
+ for (so_list *so : pspace->solibs ()) { ... } */
+ next_adapter<struct so_list> solibs () const;
+
+
+ /* Unique ID number. */
+ int num = 0;
+
+ /* The main executable loaded into this program space. This is
+ managed by the exec target. */
+
+ /* The BFD handle for the main executable. */
+ bfd *ebfd = NULL;
+ /* The last-modified time, from when the exec was brought in. */
+ long ebfd_mtime = 0;
+ /* Similar to bfd_get_filename (exec_bfd) but in original form given
+ by user, without symbolic links and pathname resolved.
+ It needs to be freed by xfree. It is not NULL iff EBFD is not NULL. */
+ char *pspace_exec_filename = NULL;
+
+ /* Binary file diddling handle for the core file. */
+ gdb_bfd_ref_ptr cbfd;
+
+ /* The address space attached to this program space. More than one
+ program space may be bound to the same address space. In the
+ traditional unix-like debugging scenario, this will usually
+ match the address space bound to the inferior, and is mostly
+ used by the breakpoints module for address matches. If the
+ target shares a program space for all inferiors and breakpoints
+ are global, then this field is ignored (we don't currently
+ support inferiors sharing a program space if the target doesn't
+ make breakpoints global). */
+ struct address_space *aspace = NULL;
+
+ /* True if this program space's section offsets don't yet represent
+ the final offsets of the "live" address space (that is, the
+ section addresses still require the relocation offsets to be
+ applied, and hence we can't trust the section addresses for
+ anything that pokes at live memory). E.g., for qOffsets
+ targets, or for PIE executables, until we connect and ask the
+ target for the final relocation offsets, the symbols we've used
+ to set breakpoints point at the wrong addresses. */
+ int executing_startup = 0;
+
+ /* True if no breakpoints should be inserted in this program
+ space. */
+ int breakpoints_not_allowed = 0;
+
+ /* The object file that the main symbol table was loaded from
+ (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. */
+ 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. */
+ struct target_section_table target_sections {};
+
+ /* List of shared objects mapped into this space. Managed by
+ solib.c. */
+ struct so_list *so_list = NULL;
+
+ /* Number of calls to solib_add. */
+ unsigned int solib_add_generation = 0;
+
+ /* When an solib is added, it is also added to this vector. This
+ is so we can properly report solib changes to the user. */
+ std::vector<struct so_list *> added_solibs;
+
+ /* When an solib is removed, its name is added to this vector.
+ This is so we can properly report solib changes to the user. */
+ std::vector<std::string> deleted_solibs;
+
+ /* Per pspace data-pointers required by other GDB modules. */
+ REGISTRY_FIELDS {};
+};
/* An address space. It is used for comparing if
pspaces/inferior/threads see the same address space and for
#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
-
/* The set of target sections matching the sections mapped into the
current program space. */
#define current_target_sections (¤t_program_space->target_sections)
/* The list of all program spaces. There's always at least one. */
-extern struct program_space *program_spaces;
+extern std::vector<struct program_space *>program_spaces;
/* The current program space. This is always non-null. */
extern struct program_space *current_program_space;
-#define ALL_PSPACES(pspace) \
- for ((pspace) = program_spaces; (pspace) != NULL; (pspace) = (pspace)->next)
-
-/* Add a new empty program space, and assign ASPACE to it. Returns the
- pointer to the new object. */
-extern struct program_space *add_program_space (struct address_space *aspace);
-
-/* 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);
-
/* Returns true iff there's no inferior bound to PSPACE. */
extern int program_space_empty_p (struct program_space *pspace);