/* Variables that describe the inferior process running under GDB:
Where it is, why it stopped, and how to step it.
- Copyright (C) 1986-2015 Free Software Foundation, Inc.
+ Copyright (C) 1986-2017 Free Software Foundation, Inc.
This file is part of GDB.
struct ui_out;
struct terminal_info;
struct target_desc_info;
+struct continuation;
+struct inferior;
/* For bpstat. */
#include "breakpoint.h"
/* For struct frame_id. */
#include "frame.h"
+/* For gdb_environ. */
+#include "environ.h"
+
#include "progspace.h"
#include "registry.h"
+#include "symfile-add-flags.h"
+#include "common/refcounted-object.h"
+
+#include "common-inferior.h"
+
struct infcall_suspend_state;
struct infcall_control_state;
extern struct regcache *
get_infcall_suspend_state_regcache (struct infcall_suspend_state *);
-/* Save value of inferior_ptid 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_inferior_ptid (void);
-
extern void set_sigint_trap (void);
extern void clear_sigint_trap (void);
extern void child_terminal_info (struct target_ops *self, const char *, int);
-extern void term_info (char *, int);
+extern void info_terminal_command (char *, int);
extern void child_terminal_ours (struct target_ops *self);
/* From fork-child.c */
-extern int fork_inferior (char *, char *, char **,
- void (*)(void),
- void (*)(int), void (*)(void), char *,
- void (*)(const char *,
- char * const *, char * const *));
-
-
-extern void startup_inferior (int);
+/* Helper function to call STARTUP_INFERIOR with PID and NUM_TRAPS.
+ This function already calls set_executing. Return the ptid_t from
+ STARTUP_INFERIOR. */
+extern ptid_t gdb_startup_inferior (pid_t pid, int num_traps);
extern char *construct_inferior_arguments (int, char **);
/* From infcmd.c */
+/* Initial inferior setup. Determines the exec file is not yet known,
+ takes any necessary post-attaching actions, fetches the target
+ description and syncs the shared library list. */
+
+extern void setup_inferior (int from_tty);
+
extern void post_create_inferior (struct target_ops *, int);
extern void attach_command (char *, int);
extern void notice_new_inferior (ptid_t, int, int);
-struct dummy_frame_context_saver;
-extern struct value *get_return_value
- (struct value *function, struct type *value_type,
- struct dummy_frame_context_saver *ctx_saver);
+extern struct value *get_return_value (struct value *function,
+ struct type *value_type);
/* Prepare for execution command. TARGET is the target that will run
the command. BACKGROUND determines whether this is a foreground
#define ON_STACK 1
#define AT_ENTRY_POINT 4
-/* Number of traps that happen between exec'ing the shell to run an
- inferior and when we finally get to the inferior code, not counting
- the exec for the shell. This is 1 on all supported
- implementations. */
-#define START_INFERIOR_TRAPS_EXPECTED 1
-
struct private_inferior;
/* Inferior process specific part of `struct infcall_control_state'.
enum stop_kind stop_soon;
};
-/* Inferior process specific part of `struct infcall_suspend_state'.
-
- Inferior thread counterpart is `struct thread_suspend_state'. */
+/* Return a pointer to the current inferior. */
+extern inferior *current_inferior ();
-#if 0 /* Currently unused and empty structures are not valid C. */
-struct inferior_suspend_state
-{
-};
-#endif
+extern void set_current_inferior (inferior *);
/* GDB represents the state of each program execution with an object
called an inferior. An inferior typically corresponds to a process
inferior, as does each attachment to an existing process.
Inferiors have unique internal identifiers that are different from
target process ids. Each inferior may in turn have multiple
- threads running in it. */
-
-struct inferior
+ threads running in it.
+
+ Inferiors are intrusively refcounted objects. Unlike thread
+ objects, being the user-selected inferior is considered a strong
+ reference and is thus accounted for in the inferior object's
+ refcount (see set_current_inferior). When GDB needs to remember
+ the selected inferior to later restore it, GDB temporarily bumps
+ the inferior object's refcount, to prevent something deleting the
+ inferior object before reverting back (e.g., due to a
+ "remove-inferiors" command (see
+ make_cleanup_restore_current_thread). All other inferior
+ references are considered weak references. Inferiors are always
+ listed exactly once in the inferior list, so placing an inferior in
+ the inferior list is an implicit, not counted strong reference. */
+
+class inferior : public refcounted_object
{
+public:
+ explicit inferior (int pid);
+ ~inferior ();
+
+ /* Returns true if we can delete this inferior. */
+ bool deletable () const { return refcount () == 0; }
+
/* Pointer to next inferior in singly-linked list of inferiors. */
- struct inferior *next;
+ struct inferior *next = NULL;
/* Convenient handle (GDB inferior id). Unique across all
inferiors. */
- int num;
+ int num = 0;
/* Actual target inferior id, usually, a process id. This matches
the ptid_t.pid member of threads of this inferior. */
- int pid;
+ int pid = 0;
/* True if the PID was actually faked by GDB. */
- int fake_pid_p;
+ bool fake_pid_p = false;
+
+ /* The highest thread number this inferior ever had. */
+ int highest_thread_num = 0;
/* State of GDB control of inferior process execution.
See `struct inferior_control_state'. */
- struct inferior_control_state control;
-
- /* State of inferior process to restore after GDB is done with an inferior
- call. See `struct inferior_suspend_state'. */
-#if 0 /* Currently unused and empty structures are not valid C. */
- struct inferior_suspend_state suspend;
-#endif
+ inferior_control_state control {NO_STOP_QUIETLY};
/* True if this was an auto-created inferior, e.g. created from
following a fork; false, if this inferior was manually added by
the user, and we should not attempt to prune it
automatically. */
- int removable;
+ bool removable = false;
/* The address space bound to this inferior. */
- struct address_space *aspace;
+ struct address_space *aspace = NULL;
/* The program space bound to this inferior. */
- struct program_space *pspace;
+ struct program_space *pspace = NULL;
/* The arguments string to use when running. */
- char *args;
+ char *args = NULL;
/* The size of elements in argv. */
- int argc;
+ int argc = 0;
/* The vector version of arguments. If ARGC is nonzero,
then we must compute ARGS from this (via the target).
This is always coming from main's argv and therefore
should never be freed. */
- char **argv;
+ char **argv = NULL;
+
+ /* The current working directory that will be used when starting
+ this inferior. */
+ gdb::unique_xmalloc_ptr<char> cwd;
/* The name of terminal device to use for I/O. */
- char *terminal;
+ char *terminal = NULL;
/* Environment to use for running inferior,
in format described in environ.h. */
- struct gdb_environ *environment;
+ gdb_environ environment;
- /* Nonzero if this child process was attached rather than
- forked. */
- int attach_flag;
+ /* True if this child process was attached rather than forked. */
+ bool attach_flag = false;
/* If this inferior is a vfork child, then this is the pointer to
its vfork parent, if GDB is still attached to it. */
- struct inferior *vfork_parent;
+ inferior *vfork_parent = NULL;
/* If this process is a vfork parent, this is the pointer to the
child. Since a vfork parent is left frozen by the kernel until
the child execs or exits, a process can only have one vfork child
at a given time. */
- struct inferior *vfork_child;
+ inferior *vfork_child = NULL;
/* True if this inferior should be detached when it's vfork sibling
exits or execs. */
- int pending_detach;
+ bool pending_detach = false;
/* True if this inferior is a vfork parent waiting for a vfork child
not under our control to be done with the shared memory region,
either by exiting or execing. */
- int waiting_for_vfork_done;
+ bool waiting_for_vfork_done = false;
/* True if we're in the process of detaching from this inferior. */
- int detaching;
+ bool detaching = false;
/* What is left to do for an execution command after any thread of
this inferior stops. For continuations associated with a
specific thread, see `struct thread_info'. */
- struct continuation *continuations;
+ continuation *continuations = NULL;
+
+ /* True if setup_inferior wasn't called for this inferior yet.
+ Until that is done, we must not access inferior memory or
+ registers, as we haven't determined the target
+ architecture/description. */
+ bool needs_setup = false;
/* Private data used by the target vector implementation. */
- struct private_inferior *priv;
+ private_inferior *priv = NULL;
/* HAS_EXIT_CODE is true if the inferior exited with an exit code.
In this case, the EXIT_CODE field is also valid. */
- int has_exit_code;
- LONGEST exit_code;
+ bool has_exit_code = false;
+ LONGEST exit_code = 0;
/* Default flags to pass to the symbol reading functions. These are
- used whenever a new objfile is created. The valid values come
- from enum symfile_add_flags. */
- int symfile_flags;
+ used whenever a new objfile is created. */
+ symfile_add_flags symfile_flags = 0;
/* Info about an inferior's target description (if it's fetched; the
user supplied description's filename, if any; etc.). */
- struct target_desc_info *tdesc_info;
+ target_desc_info *tdesc_info = NULL;
/* The architecture associated with the inferior through the
connection to the target.
per-thread/per-frame/per-objfile properties, accesses to
per-inferior/target properties should be made through
this gdbarch. */
- struct gdbarch *gdbarch;
+ struct gdbarch *gdbarch = NULL;
/* Per inferior data-pointers required by other GDB modules. */
REGISTRY_FIELDS;
DECLARE_REGISTRY (inferior);
-/* Create an empty inferior list, or empty the existing one. */
-extern void init_inferior_list (void);
-
/* Add an inferior to the inferior list, print a message that a new
inferior is found, and return the pointer to the new inferior.
Caller may use this pointer to initialize the private inferior
the CLI. */
extern struct inferior *add_inferior_silent (int pid);
-/* Delete an existing inferior list entry, due to inferior exit. */
-extern void delete_inferior (int pid);
-
-extern void delete_inferior_1 (struct inferior *todel, int silent);
-
-/* Same as delete_inferior, but don't print new inferior notifications
- to the CLI. */
-extern void delete_inferior_silent (int pid);
+extern void delete_inferior (struct inferior *todel);
/* Delete an existing inferior list entry, due to inferior detaching. */
extern void detach_inferior (int pid);
/* Returns true if the inferior list is not empty. */
extern int have_inferiors (void);
+/* Returns the number of live inferiors (real live processes). */
+extern int number_of_live_inferiors (void);
+
/* Returns true if there are any live inferiors in the inferior list
(not cores, not executables, real live processes). */
extern int have_live_inferiors (void);
-/* Return a pointer to the current inferior. It is an error to call
- this if there is no current inferior. */
-extern struct inferior *current_inferior (void);
+/* Save/restore the current inferior. */
-extern void set_current_inferior (struct inferior *);
+class scoped_restore_current_inferior
+{
+public:
+ scoped_restore_current_inferior ()
+ : m_saved_inf (current_inferior ())
+ {}
+
+ ~scoped_restore_current_inferior ()
+ { set_current_inferior (m_saved_inf); }
+
+ DISABLE_COPY_AND_ASSIGN (scoped_restore_current_inferior);
+
+private:
+ inferior *m_saved_inf;
+};
-extern struct cleanup *save_current_inferior (void);
/* Traverse all inferiors. */
#define ALL_INFERIORS(I) \
for ((I) = inferior_list; (I); (I) = (I)->next)
+/* Traverse all non-exited inferiors. */
+
+#define ALL_NON_EXITED_INFERIORS(I) \
+ ALL_INFERIORS (I) \
+ if ((I)->pid != 0)
+
extern struct inferior *inferior_list;
/* Prune away automatically added inferiors that aren't required
extern struct inferior *add_inferior_with_spaces (void);
+/* Print the current selected inferior. */
+extern void print_selected_inferior (struct ui_out *uiout);
+
#endif /* !defined (INFERIOR_H) */
projects / deliverable / binutils-gdb.git / blobdiff