/* Program and address space management, for GDB, the GNU debugger.
- Copyright (C) 2009 Free Software Foundation, Inc.
+ Copyright (C) 2009-2019 Free Software Foundation, Inc.
This file is part of GDB.
#define PROGSPACE_H
#include "target.h"
-#include "vec.h"
+#include "gdb_bfd.h"
+#include "gdbsupport/gdb_vecs.h"
+#include "registry.h"
+#include "gdbsupport/next-iterator.h"
+#include "gdbsupport/safe-iterator.h"
struct target_ops;
struct bfd;
struct exec;
struct address_space;
struct program_space_data;
+struct address_space_data;
/* 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
+{
+ program_space (address_space *aspace_);
+ ~program_space ();
+
+ typedef next_adapter<struct objfile> 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;
-
- /* 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;
-
- /* Per pspace data-pointers required by other GDB modules. */
- void **data;
- unsigned num_data;
- };
+ return objfiles_range (objfiles_head);
+ }
+
+ typedef next_adapter<struct objfile,
+ basic_safe_iterator<next_iterator<objfile>>>
+ 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_head);
+ }
+
+ /* 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 (struct objfile *objfile, struct objfile *before);
+
+
+ /* Pointer to next in linked list. */
+ struct program_space *next = NULL;
+
+ /* 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. This points to
+ the head of this list. */
+ struct objfile *objfiles_head = NULL;
+
+ /* 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
+ associating caches to each address space. */
+struct address_space
+{
+ int num;
+
+ /* Per aspace data-pointers required by other GDB modules. */
+ REGISTRY_FIELDS;
+};
/* The object file that the main symbol table was loaded from (e.g. the
argument to the "symbol-file" or "file" command). */
#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
+ 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 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);
-
-/* Release PSPACE and removes it from the pspace list. */
-extern void remove_program_space (struct program_space *pspace);
+/* 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);
+
/* Copies program space SRC to DEST. Copies the main executable file,
and the main symbol file. Returns DEST. */
extern struct program_space *clone_program_space (struct program_space *dest,
struct program_space *src);
-/* Save the current program space so that it may be restored by a later
- call to do_cleanups. Returns the struct cleanup pointer needed for
- later doing the cleanup. */
-extern struct cleanup *save_current_program_space (void);
-
/* Sets PSPACE as the current program space. This is usually used
instead of set_current_space_and_thread when the current
thread/inferior is not important for the operations that follow.
space. */
extern void set_current_program_space (struct program_space *pspace);
-/* Saves the current thread (may be null), frame and program space in
- the current cleanup chain. */
-extern struct cleanup *save_current_space_and_thread (void);
+/* Save/restore the current program space. */
+
+class scoped_restore_current_program_space
+{
+public:
+ scoped_restore_current_program_space ()
+ : m_saved_pspace (current_program_space)
+ {}
+
+ ~scoped_restore_current_program_space ()
+ { set_current_program_space (m_saved_pspace); }
-/* Switches full context to program space PSPACE. Switches to the
- first thread found bound to PSPACE. */
-extern void switch_to_program_space_and_thread (struct program_space *pspace);
+ DISABLE_COPY_AND_ASSIGN (scoped_restore_current_program_space);
+
+private:
+ program_space *m_saved_pspace;
+};
/* Create a new address space object, and add it to the list. */
extern struct address_space *new_address_space (void);
mappings. */
extern void update_address_spaces (void);
-/* Prune away automatically added program spaces that aren't required
- anymore. */
-extern void prune_program_spaces (void);
+/* Reset saved solib data at the start of an solib event. This lets
+ us properly collect the data when calling solib_add, so it can then
+ later be printed. */
+extern void clear_program_space_solib_cache (struct program_space *);
/* Keep a registry of per-pspace data-pointers required by other GDB
modules. */
-extern const struct program_space_data *register_program_space_data (void);
-extern const struct program_space_data *register_program_space_data_with_cleanup
- (void (*cleanup) (struct program_space *, void *));
-extern void clear_program_space_data (struct program_space *pspace);
-extern void set_program_space_data (struct program_space *pspace,
- const struct program_space_data *data, void *value);
-extern void *program_space_data (struct program_space *pspace,
- const struct program_space_data *data);
+DECLARE_REGISTRY (program_space);
+
+/* Keep a registry of per-aspace data-pointers required by other GDB
+ modules. */
+
+DECLARE_REGISTRY (address_space);
#endif
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