/* Variables that describe the inferior process running under GDB:
Where it is, why it stopped, and how to step it.
- Copyright (C) 1986, 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995,
- 1996, 1998, 1999, 2000, 2001, 2003, 2004, 2005, 2006
- Free Software Foundation, Inc.
+ Copyright (C) 1986-2019 Free Software Foundation, Inc.
This file is part of GDB.
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
- the Free Software Foundation; either version 2 of the License, or
+ the Free Software Foundation; either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
- along with this program; if not, write to the Free Software
- Foundation, Inc., 51 Franklin Street, Fifth Floor,
- Boston, MA 02110-1301, USA. */
+ along with this program. If not, see <http://www.gnu.org/licenses/>. */
#if !defined (INFERIOR_H)
#define INFERIOR_H 1
struct type;
struct gdbarch;
struct regcache;
+struct ui_out;
+struct terminal_info;
+struct target_desc_info;
+struct continuation;
+struct inferior;
+struct thread_info;
/* For bpstat. */
#include "breakpoint.h"
-/* For enum target_signal. */
+/* For enum gdb_signal. */
#include "target.h"
/* For struct frame_id. */
#include "frame.h"
-/* Structure in which to save the status of the inferior. Create/Save
- through "save_inferior_status", restore through
- "restore_inferior_status".
+/* For gdb_environ. */
+#include "gdbsupport/environ.h"
- This pair of routines should be called around any transfer of
- control to the inferior which you don't want showing up in your
- control variables. */
+#include "progspace.h"
+#include "registry.h"
-struct inferior_status;
+#include "symfile-add-flags.h"
+#include "gdbsupport/refcounted-object.h"
+#include "gdbsupport/forward-scope-exit.h"
-extern struct inferior_status *save_inferior_status (int);
+#include "gdbsupport/common-inferior.h"
+#include "gdbthread.h"
-extern void restore_inferior_status (struct inferior_status *);
+struct infcall_suspend_state;
+struct infcall_control_state;
-extern struct cleanup *make_cleanup_restore_inferior_status (struct inferior_status *);
+extern void restore_infcall_suspend_state (struct infcall_suspend_state *);
+extern void restore_infcall_control_state (struct infcall_control_state *);
-extern void discard_inferior_status (struct inferior_status *);
-
-extern void write_inferior_status_register (struct inferior_status
- *inf_status, int regno,
- LONGEST val);
-
-/* The -1 ptid, often used to indicate either an error condition
- or a "don't care" condition, i.e, "run all threads." */
-extern ptid_t minus_one_ptid;
-
-/* The null or zero ptid, often used to indicate no process. */
-extern ptid_t null_ptid;
-
-/* Attempt to find and return an existing ptid with the given PID, LWP,
- and TID components. If none exists, create a new one and return
- that. */
-ptid_t ptid_build (int pid, long lwp, long tid);
-
-/* Find/Create a ptid from just a pid. */
-ptid_t pid_to_ptid (int pid);
-
-/* Fetch the pid (process id) component from a ptid. */
-int ptid_get_pid (ptid_t ptid);
+/* A deleter for infcall_suspend_state that calls
+ restore_infcall_suspend_state. */
+struct infcall_suspend_state_deleter
+{
+ void operator() (struct infcall_suspend_state *state) const
+ {
+ try
+ {
+ restore_infcall_suspend_state (state);
+ }
+ catch (const gdb_exception_error &e)
+ {
+ /* If we are restoring the inferior state due to an exception,
+ some error message will be printed. So, only warn the user
+ when we cannot restore during normal execution. */
+ if (!std::uncaught_exception ())
+ warning (_("Failed to restore inferior state: %s"), e.what ());
+ }
+ }
+};
+
+/* A unique_ptr specialization for infcall_suspend_state. */
+typedef std::unique_ptr<infcall_suspend_state, infcall_suspend_state_deleter>
+ infcall_suspend_state_up;
+
+extern infcall_suspend_state_up save_infcall_suspend_state ();
+
+/* A deleter for infcall_control_state that calls
+ restore_infcall_control_state. */
+struct infcall_control_state_deleter
+{
+ void operator() (struct infcall_control_state *state) const
+ {
+ restore_infcall_control_state (state);
+ }
+};
-/* Fetch the lwp (lightweight process) component from a ptid. */
-long ptid_get_lwp (ptid_t ptid);
+/* A unique_ptr specialization for infcall_control_state. */
+typedef std::unique_ptr<infcall_control_state, infcall_control_state_deleter>
+ infcall_control_state_up;
-/* Fetch the tid (thread id) component from a ptid. */
-long ptid_get_tid (ptid_t ptid);
+extern infcall_control_state_up save_infcall_control_state ();
-/* Compare two ptids to see if they are equal */
-extern int ptid_equal (ptid_t p1, ptid_t p2);
+extern void discard_infcall_suspend_state (struct infcall_suspend_state *);
+extern void discard_infcall_control_state (struct infcall_control_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 readonly_detached_regcache *
+ get_infcall_suspend_state_regcache (struct infcall_suspend_state *);
extern void set_sigint_trap (void);
extern void clear_sigint_trap (void);
-extern void set_sigio_trap (void);
-
-extern void clear_sigio_trap (void);
-
/* Set/get file name for default use for standard in/out in the inferior. */
extern void set_inferior_io_terminal (const char *terminal_name);
extern const char *get_inferior_io_terminal (void);
/* Collected pid, tid, etc. of the debugged inferior. When there's
- no inferior, PIDGET (inferior_ptid) will be 0. */
+ no inferior, inferior_ptid.pid () will be 0. */
extern ptid_t inferior_ptid;
-/* Is the inferior running right now, as a result of a 'run&',
- 'continue&' etc command? This is used in asycn gdb to determine
- whether a command that the user enters while the target is running
- is allowed or not. */
-extern int target_executing;
-
-/* Are we simulating synchronous execution? This is used in async gdb
- to implement the 'run', 'continue' etc commands, which will not
- redisplay the prompt until the execution is actually over. */
-extern int sync_execution;
-
-/* This is only valid when inferior_ptid is non-zero.
-
- If this is 0, then exec events should be noticed and responded to
- by the debugger (i.e., be reported to the user).
-
- If this is > 0, then that many subsequent exec events should be
- ignored (i.e., not be reported to the user).
- */
-extern int inferior_ignoring_startup_exec_events;
+extern void generic_mourn_inferior (void);
-/* This is only valid when inferior_ignoring_startup_exec_events is
- zero.
+extern CORE_ADDR unsigned_pointer_to_address (struct gdbarch *gdbarch,
+ struct type *type,
+ const gdb_byte *buf);
+extern void unsigned_address_to_pointer (struct gdbarch *gdbarch,
+ struct type *type, gdb_byte *buf,
+ CORE_ADDR addr);
+extern CORE_ADDR signed_pointer_to_address (struct gdbarch *gdbarch,
+ struct type *type,
+ const gdb_byte *buf);
+extern void address_to_signed_pointer (struct gdbarch *gdbarch,
+ struct type *type, gdb_byte *buf,
+ CORE_ADDR addr);
- Some targets (stupidly) report more than one exec event per actual
- call to an event() system call. If only the last such exec event
- need actually be noticed and responded to by the debugger (i.e.,
- be reported to the user), then this is the number of "leading"
- exec events which should be ignored.
- */
-extern int inferior_ignoring_leading_exec_events;
+extern void reopen_exec_file (void);
-/* Inferior environment. */
+/* From misc files */
-extern struct gdb_environ *inferior_environ;
+extern void default_print_registers_info (struct gdbarch *gdbarch,
+ struct ui_file *file,
+ struct frame_info *frame,
+ int regnum, int all);
-extern void clear_proceed_status (void);
+/* Default implementation of gdbarch_print_float_info. Print
+ the values of all floating point registers. */
-extern void proceed (CORE_ADDR, enum target_signal, int);
+extern void default_print_float_info (struct gdbarch *gdbarch,
+ struct ui_file *file,
+ struct frame_info *frame,
+ const char *args);
-/* When set, stop the 'step' command if we enter a function which has
- no line number information. The normal behavior is that we step
- over such function. */
-extern int step_stop_if_no_debug;
+extern void child_terminal_info (struct target_ops *self, const char *, int);
-extern void kill_inferior (void);
+extern void child_terminal_ours (struct target_ops *self);
-extern void generic_mourn_inferior (void);
+extern void child_terminal_ours_for_output (struct target_ops *self);
-extern void terminal_save_ours (void);
+extern void child_terminal_inferior (struct target_ops *self);
-extern void terminal_ours (void);
+extern void child_terminal_save_inferior (struct target_ops *self);
-extern CORE_ADDR read_pc (void);
+extern void child_terminal_init (struct target_ops *self);
-extern CORE_ADDR read_pc_pid (ptid_t);
+extern void child_terminal_init_with_pgrp (int pgrp);
-extern void write_pc (CORE_ADDR);
+extern void child_pass_ctrlc (struct target_ops *self);
-extern void write_pc_pid (CORE_ADDR, ptid_t);
+extern void child_interrupt (struct target_ops *self);
-extern void generic_target_write_pc (CORE_ADDR, ptid_t);
+/* From fork-child.c */
-extern CORE_ADDR read_sp (void);
+/* 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 CORE_ADDR unsigned_pointer_to_address (struct type *type,
- const gdb_byte *buf);
-extern void unsigned_address_to_pointer (struct type *type, gdb_byte *buf,
- CORE_ADDR addr);
-extern CORE_ADDR signed_pointer_to_address (struct type *type,
- const gdb_byte *buf);
-extern void address_to_signed_pointer (struct type *type, gdb_byte *buf,
- CORE_ADDR addr);
+extern char *construct_inferior_arguments (int, char **);
-extern void wait_for_inferior (void);
+/* From infcmd.c */
-extern void fetch_inferior_event (void *);
+/* 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 init_wait_for_inferior (void);
+extern void setup_inferior (int from_tty);
-extern void close_exec_file (void);
+extern void post_create_inferior (struct target_ops *, int);
-extern void reopen_exec_file (void);
+extern void attach_command (const char *, int);
-/* The `resume' routine should only be called in special circumstances.
- Normally, use `proceed', which handles a lot of bookkeeping. */
+extern const char *get_inferior_args (void);
-extern void resume (int, enum target_signal);
+extern void set_inferior_args (const char *);
-/* From misc files */
+extern void set_inferior_args_vector (int, char **);
-extern void default_print_registers_info (struct gdbarch *gdbarch,
- struct ui_file *file,
- struct frame_info *frame,
- int regnum, int all);
+extern void registers_info (const char *, int);
-extern void store_inferior_registers (int);
+extern void continue_1 (int all_threads);
-extern void fetch_inferior_registers (int);
+extern void interrupt_target_1 (int all_threads);
-extern void child_terminal_info (char *, int);
+using delete_longjmp_breakpoint_cleanup
+ = FORWARD_SCOPE_EXIT (delete_longjmp_breakpoint);
-extern void term_info (char *, int);
+extern void detach_command (const char *, int);
-extern void terminal_ours_for_output (void);
+extern void notice_new_inferior (struct thread_info *, int, int);
-extern void terminal_inferior (void);
+extern struct value *get_return_value (struct value *function,
+ struct type *value_type);
-extern void terminal_init_inferior (void);
+/* Prepare for execution command. TARGET is the target that will run
+ the command. BACKGROUND determines whether this is a foreground
+ (synchronous) or background (asynchronous) command. */
-extern void terminal_init_inferior_with_pgrp (int pgrp);
+extern void prepare_execution_command (struct target_ops *target,
+ int background);
-/* From infptrace.c or infttrace.c */
+/* Nonzero if stopped due to completion of a stack dummy routine. */
-extern int attach (int);
+extern enum stop_stack_kind stop_stack_dummy;
-extern void detach (int);
+/* Nonzero if program stopped due to a random (unexpected) signal in
+ inferior process. */
-/* PTRACE method of waiting for inferior process. */
-int ptrace_wait (ptid_t, int *);
+extern int stopped_by_random_signal;
-extern void child_resume (ptid_t, int, enum target_signal);
+/* Print notices on inferior events (attach, detach, etc.), set with
+ `set print inferior-events'. */
+extern bool print_inferior_events;
-#ifndef PTRACE_ARG3_TYPE
-#define PTRACE_ARG3_TYPE PTRACE_TYPE_ARG3
-#endif
+/* Anything but NO_STOP_QUIETLY means we expect a trap and the caller
+ will handle it themselves. STOP_QUIETLY is used when running in
+ the shell before the child program has been exec'd and when running
+ through shared library loading. STOP_QUIETLY_REMOTE is used when
+ setting up a remote connection; it is like STOP_QUIETLY_NO_SIGSTOP
+ except that there is no need to hide a signal. */
-extern int call_ptrace (int, int, PTRACE_ARG3_TYPE, int);
+/* STOP_QUIETLY_NO_SIGSTOP is used to handle a tricky situation with attach.
+ When doing an attach, the kernel stops the debuggee with a SIGSTOP.
+ On newer GNU/Linux kernels (>= 2.5.61) the handling of SIGSTOP for
+ a ptraced process has changed. Earlier versions of the kernel
+ would ignore these SIGSTOPs, while now SIGSTOP is treated like any
+ other signal, i.e. it is not muffled.
-extern void pre_fork_inferior (void);
+ If the gdb user does a 'continue' after the 'attach', gdb passes
+ the global variable stop_signal (which stores the signal from the
+ attach, SIGSTOP) to the ptrace(PTRACE_CONT,...) call. This is
+ problematic, because the kernel doesn't ignore such SIGSTOP
+ now. I.e. it is reported back to gdb, which in turn presents it
+ back to the user.
-/* From procfs.c */
+ To avoid the problem, we use STOP_QUIETLY_NO_SIGSTOP, which allows
+ gdb to clear the value of stop_signal after the attach, so that it
+ is not passed back down to the kernel. */
-extern int proc_iterate_over_mappings (int (*)(int, CORE_ADDR));
+enum stop_kind
+ {
+ NO_STOP_QUIETLY = 0,
+ STOP_QUIETLY,
+ STOP_QUIETLY_REMOTE,
+ STOP_QUIETLY_NO_SIGSTOP
+ };
-extern ptid_t procfs_first_available (void);
+\f
+/* Possible values for gdbarch_call_dummy_location. */
+#define ON_STACK 1
+#define AT_ENTRY_POINT 4
-/* From fork-child.c */
+/* Base class for target-specific inferior data. */
-extern void fork_inferior (char *, char *, char **,
- void (*)(void),
- void (*)(int), void (*)(void), char *);
+struct private_inferior
+{
+ virtual ~private_inferior () = 0;
+};
+/* Inferior process specific part of `struct infcall_control_state'.
-extern void startup_inferior (int);
+ Inferior thread counterpart is `struct thread_control_state'. */
-extern char *construct_inferior_arguments (struct gdbarch *, int, char **);
+struct inferior_control_state
+{
+ inferior_control_state ()
+ : stop_soon (NO_STOP_QUIETLY)
+ {
+ }
-/* From inflow.c */
+ explicit inferior_control_state (enum stop_kind when)
+ : stop_soon (when)
+ {
+ }
+
+ /* See the definition of stop_kind above. */
+ enum stop_kind stop_soon;
+};
+
+/* Return a pointer to the current inferior. */
+extern inferior *current_inferior ();
+
+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
+ but is more general and applies also to targets that do not have a
+ notion of processes. Each run of an executable creates a new
+ 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.
+
+ 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
+ scoped_restore_current_inferior). 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 = NULL;
+
+ /* This inferior's thread list. */
+ thread_info *thread_list = nullptr;
+
+ /* Returns a range adapter covering the inferior's threads,
+ including exited threads. Used like this:
+
+ for (thread_info *thr : inf->threads ())
+ { .... }
+ */
+ inf_threads_range threads ()
+ { return inf_threads_range (this->thread_list); }
+
+ /* Returns a range adapter covering the inferior's non-exited
+ threads. Used like this:
+
+ for (thread_info *thr : inf->non_exited_threads ())
+ { .... }
+ */
+ inf_non_exited_threads_range non_exited_threads ()
+ { return inf_non_exited_threads_range (this->thread_list); }
+
+ /* Like inferior::threads(), but returns a range adapter that can be
+ used with range-for, safely. I.e., it is safe to delete the
+ currently-iterated thread, like this:
+
+ for (thread_info *t : inf->threads_safe ())
+ if (some_condition ())
+ delete f;
+ */
+ inline safe_inf_threads_range threads_safe ()
+ { return safe_inf_threads_range (this->thread_list); }
+
+ /* Convenient handle (GDB inferior id). Unique across all
+ inferiors. */
+ 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 = 0;
+ /* True if the PID was actually faked by GDB. */
+ 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'. */
+ inferior_control_state control;
+
+ /* 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. */
+ bool removable = false;
+
+ /* The address space bound to this inferior. */
+ struct address_space *aspace = NULL;
+
+ /* The program space bound to this inferior. */
+ struct program_space *pspace = NULL;
+
+ /* The arguments string to use when running. */
+ char *args = NULL;
+
+ /* The size of elements in argv. */
+ 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 = 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 = NULL;
+
+ /* The terminal state as set by the last target_terminal::terminal_*
+ call. */
+ target_terminal_state terminal_state = target_terminal_state::is_ours;
+
+ /* Environment to use for running inferior,
+ in format described in environ.h. */
+ gdb_environ environment;
-extern void new_tty_prefork (const char *);
+ /* True if this child process was attached rather than forked. */
+ bool attach_flag = false;
-extern int gdb_has_a_terminal (void);
+ /* If this inferior is a vfork child, then this is the pointer to
+ its vfork parent, if GDB is still attached to it. */
+ inferior *vfork_parent = NULL;
-/* From infrun.c */
+ /* 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. */
+ inferior *vfork_child = NULL;
-extern void start_remote (void);
+ /* True if this inferior should be detached when it's vfork sibling
+ exits or execs. */
+ bool pending_detach = false;
-extern void normal_stop (void);
+ /* 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. */
+ bool waiting_for_vfork_done = false;
-extern int signal_stop_state (int);
+ /* True if we're in the process of detaching from this inferior. */
+ bool detaching = false;
-extern int signal_print_state (int);
+ /* 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'. */
+ continuation *continuations = NULL;
-extern int signal_pass_state (int);
+ /* 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;
-extern int signal_stop_update (int, int);
+ /* Private data used by the target vector implementation. */
+ std::unique_ptr<private_inferior> priv;
-extern int signal_print_update (int, int);
+ /* HAS_EXIT_CODE is true if the inferior exited with an exit code.
+ In this case, the EXIT_CODE field is also valid. */
+ bool has_exit_code = false;
+ LONGEST exit_code = 0;
-extern int signal_pass_update (int, int);
+ /* Default flags to pass to the symbol reading functions. These are
+ used whenever a new objfile is created. */
+ symfile_add_flags symfile_flags = 0;
-extern void get_last_target_status(ptid_t *ptid,
- struct target_waitstatus *status);
+ /* Info about an inferior's target description (if it's fetched; the
+ user supplied description's filename, if any; etc.). */
+ target_desc_info *tdesc_info = NULL;
-extern void follow_inferior_reset_breakpoints (void);
+ /* The architecture associated with the inferior through the
+ connection to the target.
-/* From infcmd.c */
+ The architecture vector provides some information that is really
+ a property of the inferior, accessed through a particular target:
+ ptrace operations; the layout of certain RSP packets; the
+ solib_ops vector; etc. To differentiate architecture accesses to
+ per-inferior/target properties from
+ per-thread/per-frame/per-objfile properties, accesses to
+ per-inferior/target properties should be made through
+ this gdbarch. */
+ struct gdbarch *gdbarch = NULL;
-extern void tty_command (char *, int);
+ /* Data related to displaced stepping. */
+ displaced_step_inferior_state displaced_step_state;
-extern void post_create_inferior (struct target_ops *, int);
+ /* Per inferior data-pointers required by other GDB modules. */
+ REGISTRY_FIELDS;
+};
-extern void attach_command (char *, int);
+/* Keep a registry of per-inferior data-pointers required by other GDB
+ modules. */
-extern char *get_inferior_args (void);
+DECLARE_REGISTRY (inferior);
-extern char *set_inferior_args (char *);
+/* 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
+ data. */
+extern struct inferior *add_inferior (int pid);
-extern void set_inferior_args_vector (int, char **);
+/* Same as add_inferior, but don't print new inferior notifications to
+ the CLI. */
+extern struct inferior *add_inferior_silent (int pid);
-extern void registers_info (char *, int);
+extern void delete_inferior (struct inferior *todel);
-extern void nexti_command (char *, int);
+/* Delete an existing inferior list entry, due to inferior detaching. */
+extern void detach_inferior (inferior *inf);
-extern void stepi_command (char *, int);
+extern void exit_inferior (inferior *inf);
-extern void continue_command (char *, int);
+extern void exit_inferior_silent (inferior *inf);
-extern void interrupt_target_command (char *args, int from_tty);
+extern void exit_inferior_num_silent (int num);
-/* Last signal that the inferior received (why it stopped). */
+extern void inferior_appeared (struct inferior *inf, int pid);
-extern enum target_signal stop_signal;
+/* Get rid of all inferiors. */
+extern void discard_all_inferiors (void);
-/* Address at which inferior stopped. */
+/* Search function to lookup an inferior by target 'pid'. */
+extern struct inferior *find_inferior_pid (int pid);
-extern CORE_ADDR stop_pc;
+/* Search function to lookup an inferior whose pid is equal to 'ptid.pid'. */
+extern struct inferior *find_inferior_ptid (ptid_t ptid);
-/* Chain containing status of breakpoint(s) that we have stopped at. */
+/* Search function to lookup an inferior by GDB 'num'. */
+extern struct inferior *find_inferior_id (int num);
-extern bpstat stop_bpstat;
+/* Find an inferior bound to PSPACE, giving preference to the current
+ inferior. */
+extern struct inferior *
+ find_inferior_for_program_space (struct program_space *pspace);
-/* Flag indicating that a command has proceeded the inferior past the
- current breakpoint. */
+/* Inferior iterator function.
-extern int breakpoint_proceeded;
+ Calls a callback function once for each inferior, so long as the
+ callback function returns false. If the callback function returns
+ true, the iteration will end and the current inferior will be
+ returned. This can be useful for implementing a search for a
+ inferior with arbitrary attributes, or for applying some operation
+ to every inferior.
-/* Nonzero if stopped due to a step command. */
+ It is safe to delete the iterated inferior from the callback. */
+extern struct inferior *iterate_over_inferiors (int (*) (struct inferior *,
+ void *),
+ void *);
-extern int stop_step;
+/* Returns true if the inferior list is not empty. */
+extern int have_inferiors (void);
-/* Nonzero if stopped due to completion of a stack dummy routine. */
+/* Returns the number of live inferiors (real live processes). */
+extern int number_of_live_inferiors (void);
-extern int stop_stack_dummy;
+/* 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);
-/* Nonzero if program stopped due to a random (unexpected) signal in
- inferior process. */
+/* Save/restore the current inferior. */
-extern int stopped_by_random_signal;
+class scoped_restore_current_inferior
+{
+public:
+ scoped_restore_current_inferior ()
+ : m_saved_inf (current_inferior ())
+ {}
-/* Range to single step within.
- If this is nonzero, respond to a single-step signal
- by continuing to step if the pc is in this range.
+ ~scoped_restore_current_inferior ()
+ { set_current_inferior (m_saved_inf); }
- If step_range_start and step_range_end are both 1, it means to step for
- a single instruction (FIXME: it might clean up wait_for_inferior in a
- minor way if this were changed to the address of the instruction and
- that address plus one. But maybe not.). */
+ DISABLE_COPY_AND_ASSIGN (scoped_restore_current_inferior);
-extern CORE_ADDR step_range_start; /* Inclusive */
-extern CORE_ADDR step_range_end; /* Exclusive */
+private:
+ inferior *m_saved_inf;
+};
-/* Stack frame address as of when stepping command was issued.
- This is how we know when we step into a subroutine call,
- and how to set the frame for the breakpoint used to step out. */
-extern struct frame_id step_frame_id;
+/* Traverse all inferiors. */
-/* 1 means step over all subroutine calls.
- -1 means step over calls to undebuggable functions. */
+extern struct inferior *inferior_list;
-enum step_over_calls_kind
- {
- STEP_OVER_NONE,
- STEP_OVER_ALL,
- STEP_OVER_UNDEBUGGABLE
- };
+/* Pull in the internals of the inferiors ranges and iterators. Must
+ be done after struct inferior is defined. */
+#include "inferior-iter.h"
-extern enum step_over_calls_kind step_over_calls;
+/* Return a range that can be used to walk over all inferiors
+ inferiors, with range-for, safely. I.e., it is safe to delete the
+ currently-iterated inferior. When combined with range-for, this
+ allow convenient patterns like this:
-/* If stepping, nonzero means step count is > 1
- so don't print frame next time inferior stops
- if it stops due to stepping. */
+ for (inferior *inf : all_inferiors_safe ())
+ if (some_condition ())
+ delete inf;
+*/
-extern int step_multi;
+inline all_inferiors_safe_range
+all_inferiors_safe ()
+{
+ return {};
+}
-/* Nonzero means expecting a trap and caller will handle it
- themselves. It is used when running in the shell before the child
- program has been exec'd; and when running some kinds of remote
- stuff (FIXME?). */
+/* Returns a range representing all inferiors, suitable to use with
+ range-for, like this:
-/* It is also used after attach, due to attaching to a process. This
- is a bit trickier. When doing an attach, the kernel stops the
- debuggee with a SIGSTOP. On newer GNU/Linux kernels (>= 2.5.61)
- the handling of SIGSTOP for a ptraced process has changed. Earlier
- versions of the kernel would ignore these SIGSTOPs, while now
- SIGSTOP is treated like any other signal, i.e. it is not muffled.
-
- If the gdb user does a 'continue' after the 'attach', gdb passes
- the global variable stop_signal (which stores the signal from the
- attach, SIGSTOP) to the ptrace(PTRACE_CONT,...) call. This is
- problematic, because the kernel doesn't ignore such SIGSTOP
- now. I.e. it is reported back to gdb, which in turn presents it
- back to the user.
-
- To avoid the problem, we use STOP_QUIETLY_NO_SIGSTOP, which allows
- gdb to clear the value of stop_signal after the attach, so that it
- is not passed back down to the kernel. */
+ for (inferior *inf : all_inferiors ())
+ [...]
+*/
-enum stop_kind
- {
- NO_STOP_QUIETLY = 0,
- STOP_QUIETLY,
- STOP_QUIETLY_NO_SIGSTOP
- };
+inline all_inferiors_range
+all_inferiors ()
+{
+ return {};
+}
-extern enum stop_kind stop_soon;
+/* Return a range that can be used to walk over all inferiors with PID
+ not zero, with range-for. */
-/* Nonzero if proceed is being used for a "finish" command or a similar
- situation when stop_registers should be saved. */
+inline all_non_exited_inferiors_range
+all_non_exited_inferiors ()
+{
+ return {};
+}
-extern int proceed_to_finish;
+/* Prune away automatically added inferiors that aren't required
+ anymore. */
+extern void prune_inferiors (void);
-/* Save register contents here when about to pop a stack dummy frame,
- if-and-only-if proceed_to_finish is set.
- Thus this contains the return value from the called function (assuming
- values are returned in a register). */
+extern int number_of_inferiors (void);
-extern struct regcache *stop_registers;
+extern struct inferior *add_inferior_with_spaces (void);
-/* Nonzero if the child process in inferior_ptid was attached rather
- than forked. */
+/* Print the current selected inferior. */
+extern void print_selected_inferior (struct ui_out *uiout);
-extern int attach_flag;
-\f
-/* Possible values for CALL_DUMMY_LOCATION. */
-#define ON_STACK 1
-#define AT_ENTRY_POINT 4
-#define AT_SYMBOL 5
-
-/* If STARTUP_WITH_SHELL is set, GDB's "run"
- will attempts to start up the debugee under a shell.
- This is in order for argument-expansion to occur. E.g.,
- (gdb) run *
- The "*" gets expanded by the shell into a list of files.
- While this is a nice feature, it turns out to interact badly
- with some of the catch-fork/catch-exec features we have added.
- In particular, if the shell does any fork/exec's before
- the exec of the target program, that can confuse GDB.
- To disable this feature, set STARTUP_WITH_SHELL to 0.
- To enable this feature, set STARTUP_WITH_SHELL to 1.
- The catch-exec traps expected during start-up will
- be 1 if target is not started up with a shell, 2 if it is.
- - RT
- If you disable this, you need to decrement
- START_INFERIOR_TRAPS_EXPECTED in tm.h. */
-#define STARTUP_WITH_SHELL 1
-#if !defined(START_INFERIOR_TRAPS_EXPECTED)
-#define START_INFERIOR_TRAPS_EXPECTED 2
-#endif
#endif /* !defined (INFERIOR_H) */
projects / deliverable / binutils-gdb.git / blobdiff