531 lines
17 KiB
C
531 lines
17 KiB
C
/* 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.
|
||
|
||
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 3 of the License, or
|
||
(at your option) any later version.
|
||
|
||
This program is distributed in the hope that it will be useful,
|
||
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
||
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, see <http://www.gnu.org/licenses/>. */
|
||
|
||
#if !defined (INFERIOR_H)
|
||
#define INFERIOR_H 1
|
||
|
||
struct target_waitstatus;
|
||
struct frame_info;
|
||
struct ui_file;
|
||
struct type;
|
||
struct gdbarch;
|
||
struct regcache;
|
||
struct ui_out;
|
||
struct terminal_info;
|
||
struct target_desc_info;
|
||
|
||
/* For bpstat. */
|
||
#include "breakpoint.h"
|
||
|
||
/* For enum gdb_signal. */
|
||
#include "target.h"
|
||
|
||
/* For struct frame_id. */
|
||
#include "frame.h"
|
||
|
||
#include "progspace.h"
|
||
#include "registry.h"
|
||
|
||
struct infcall_suspend_state;
|
||
struct infcall_control_state;
|
||
|
||
extern struct infcall_suspend_state *save_infcall_suspend_state (void);
|
||
extern struct infcall_control_state *save_infcall_control_state (void);
|
||
|
||
extern void restore_infcall_suspend_state (struct infcall_suspend_state *);
|
||
extern void restore_infcall_control_state (struct infcall_control_state *);
|
||
|
||
extern struct cleanup *make_cleanup_restore_infcall_suspend_state
|
||
(struct infcall_suspend_state *);
|
||
extern struct cleanup *make_cleanup_restore_infcall_control_state
|
||
(struct infcall_control_state *);
|
||
|
||
extern void discard_infcall_suspend_state (struct infcall_suspend_state *);
|
||
extern void discard_infcall_control_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);
|
||
|
||
/* 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, ptid_get_pid (inferior_ptid) will be 0. */
|
||
|
||
extern ptid_t inferior_ptid;
|
||
|
||
extern void generic_mourn_inferior (void);
|
||
|
||
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);
|
||
|
||
extern void reopen_exec_file (void);
|
||
|
||
/* From misc files */
|
||
|
||
extern void default_print_registers_info (struct gdbarch *gdbarch,
|
||
struct ui_file *file,
|
||
struct frame_info *frame,
|
||
int regnum, int all);
|
||
|
||
/* Default implementation of gdbarch_print_float_info. Print
|
||
the values of all floating point registers. */
|
||
|
||
extern void default_print_float_info (struct gdbarch *gdbarch,
|
||
struct ui_file *file,
|
||
struct frame_info *frame,
|
||
const char *args);
|
||
|
||
extern void child_terminal_info (struct target_ops *self, const char *, int);
|
||
|
||
extern void term_info (char *, int);
|
||
|
||
extern void child_terminal_ours (struct target_ops *self);
|
||
|
||
extern void child_terminal_ours_for_output (struct target_ops *self);
|
||
|
||
extern void child_terminal_inferior (struct target_ops *self);
|
||
|
||
extern void child_terminal_init (struct target_ops *self);
|
||
|
||
extern void child_terminal_init_with_pgrp (int pgrp);
|
||
|
||
/* 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);
|
||
|
||
extern char *construct_inferior_arguments (int, char **);
|
||
|
||
/* From infcmd.c */
|
||
|
||
extern void post_create_inferior (struct target_ops *, int);
|
||
|
||
extern void attach_command (char *, int);
|
||
|
||
extern char *get_inferior_args (void);
|
||
|
||
extern void set_inferior_args (char *);
|
||
|
||
extern void set_inferior_args_vector (int, char **);
|
||
|
||
extern void registers_info (char *, int);
|
||
|
||
extern void continue_1 (int all_threads);
|
||
|
||
extern void interrupt_target_1 (int all_threads);
|
||
|
||
extern void delete_longjmp_breakpoint_cleanup (void *arg);
|
||
|
||
extern void detach_command (char *, int);
|
||
|
||
extern void notice_new_inferior (ptid_t, int, int);
|
||
|
||
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
|
||
(synchronous) or background (asynchronous) command. */
|
||
|
||
extern void prepare_execution_command (struct target_ops *target,
|
||
int background);
|
||
|
||
/* Whether to start up the debuggee under a shell.
|
||
|
||
If startup-with-shell is set, GDB's "run" will attempt to start up
|
||
the debuggee 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 may be handy to bypass the shell
|
||
in some cases. To disable this feature, do "set startup-with-shell
|
||
false".
|
||
|
||
The catch-exec traps expected during start-up will be one more if
|
||
the target is started up with a shell. */
|
||
extern int startup_with_shell;
|
||
|
||
/* Address at which inferior stopped. */
|
||
|
||
extern CORE_ADDR stop_pc;
|
||
|
||
/* Nonzero if stopped due to completion of a stack dummy routine. */
|
||
|
||
extern enum stop_stack_kind stop_stack_dummy;
|
||
|
||
/* Nonzero if program stopped due to a random (unexpected) signal in
|
||
inferior process. */
|
||
|
||
extern int stopped_by_random_signal;
|
||
|
||
/* STEP_OVER_ALL means step over all subroutine calls.
|
||
STEP_OVER_UNDEBUGGABLE means step over calls to undebuggable functions.
|
||
STEP_OVER_NONE means don't step over any subroutine calls. */
|
||
|
||
enum step_over_calls_kind
|
||
{
|
||
STEP_OVER_NONE,
|
||
STEP_OVER_ALL,
|
||
STEP_OVER_UNDEBUGGABLE
|
||
};
|
||
|
||
/* 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. */
|
||
|
||
/* 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.
|
||
|
||
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. */
|
||
|
||
enum stop_kind
|
||
{
|
||
NO_STOP_QUIETLY = 0,
|
||
STOP_QUIETLY,
|
||
STOP_QUIETLY_REMOTE,
|
||
STOP_QUIETLY_NO_SIGSTOP
|
||
};
|
||
|
||
|
||
/* Possible values for gdbarch_call_dummy_location. */
|
||
#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'.
|
||
|
||
Inferior thread counterpart is `struct thread_control_state'. */
|
||
|
||
struct inferior_control_state
|
||
{
|
||
/* See the definition of stop_kind above. */
|
||
enum stop_kind stop_soon;
|
||
};
|
||
|
||
/* Inferior process specific part of `struct infcall_suspend_state'.
|
||
|
||
Inferior thread counterpart is `struct thread_suspend_state'. */
|
||
|
||
#if 0 /* Currently unused and empty structures are not valid C. */
|
||
struct inferior_suspend_state
|
||
{
|
||
};
|
||
#endif
|
||
|
||
/* 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. */
|
||
|
||
struct inferior
|
||
{
|
||
/* Pointer to next inferior in singly-linked list of inferiors. */
|
||
struct inferior *next;
|
||
|
||
/* Convenient handle (GDB inferior id). Unique across all
|
||
inferiors. */
|
||
int num;
|
||
|
||
/* Actual target inferior id, usually, a process id. This matches
|
||
the ptid_t.pid member of threads of this inferior. */
|
||
int pid;
|
||
/* True if the PID was actually faked by GDB. */
|
||
int fake_pid_p;
|
||
|
||
/* 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
|
||
|
||
/* 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;
|
||
|
||
/* The address space bound to this inferior. */
|
||
struct address_space *aspace;
|
||
|
||
/* The program space bound to this inferior. */
|
||
struct program_space *pspace;
|
||
|
||
/* The arguments string to use when running. */
|
||
char *args;
|
||
|
||
/* The size of elements in argv. */
|
||
int argc;
|
||
|
||
/* 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;
|
||
|
||
/* The name of terminal device to use for I/O. */
|
||
char *terminal;
|
||
|
||
/* Environment to use for running inferior,
|
||
in format described in environ.h. */
|
||
struct gdb_environ *environment;
|
||
|
||
/* Nonzero if this child process was attached rather than
|
||
forked. */
|
||
int attach_flag;
|
||
|
||
/* 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;
|
||
|
||
/* 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;
|
||
|
||
/* True if this inferior should be detached when it's vfork sibling
|
||
exits or execs. */
|
||
int pending_detach;
|
||
|
||
/* 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;
|
||
|
||
/* True if we're in the process of detaching from this inferior. */
|
||
int detaching;
|
||
|
||
/* 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;
|
||
|
||
/* Private data used by the target vector implementation. */
|
||
struct private_inferior *private;
|
||
|
||
/* 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;
|
||
|
||
/* 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;
|
||
|
||
/* 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;
|
||
|
||
/* The architecture associated with the inferior through the
|
||
connection to the target.
|
||
|
||
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;
|
||
|
||
/* Per inferior data-pointers required by other GDB modules. */
|
||
REGISTRY_FIELDS;
|
||
};
|
||
|
||
/* Keep a registry of per-inferior data-pointers required by other GDB
|
||
modules. */
|
||
|
||
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
|
||
data. */
|
||
extern struct inferior *add_inferior (int pid);
|
||
|
||
/* Same as add_inferior, but don't print new inferior notifications to
|
||
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);
|
||
|
||
/* Delete an existing inferior list entry, due to inferior detaching. */
|
||
extern void detach_inferior (int pid);
|
||
|
||
extern void exit_inferior (int pid);
|
||
|
||
extern void exit_inferior_silent (int pid);
|
||
|
||
extern void exit_inferior_num_silent (int num);
|
||
|
||
extern void inferior_appeared (struct inferior *inf, int pid);
|
||
|
||
/* Get rid of all inferiors. */
|
||
extern void discard_all_inferiors (void);
|
||
|
||
/* Translate the integer inferior id (GDB's homegrown id, not the system's)
|
||
into a "pid" (which may be overloaded with extra inferior information). */
|
||
extern int gdb_inferior_id_to_pid (int);
|
||
|
||
/* Translate a target 'pid' into the integer inferior id (GDB's
|
||
homegrown id, not the system's). */
|
||
extern int pid_to_gdb_inferior_id (int pid);
|
||
|
||
/* Boolean test for an already-known pid. */
|
||
extern int in_inferior_list (int pid);
|
||
|
||
/* Boolean test for an already-known inferior id (GDB's homegrown id,
|
||
not the system's). */
|
||
extern int valid_gdb_inferior_id (int num);
|
||
|
||
/* Search function to lookup an inferior by target 'pid'. */
|
||
extern struct inferior *find_inferior_pid (int pid);
|
||
|
||
/* Search function to lookup an inferior whose pid is equal to 'ptid.pid'. */
|
||
extern struct inferior *find_inferior_ptid (ptid_t ptid);
|
||
|
||
/* Search function to lookup an inferior by GDB 'num'. */
|
||
extern struct inferior *find_inferior_id (int num);
|
||
|
||
/* Find an inferior bound to PSPACE, giving preference to the current
|
||
inferior. */
|
||
extern struct inferior *
|
||
find_inferior_for_program_space (struct program_space *pspace);
|
||
|
||
/* Inferior iterator function.
|
||
|
||
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.
|
||
|
||
It is safe to delete the iterated inferior from the callback. */
|
||
extern struct inferior *iterate_over_inferiors (int (*) (struct inferior *,
|
||
void *),
|
||
void *);
|
||
|
||
/* Returns true if the inferior list is not empty. */
|
||
extern int have_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);
|
||
|
||
extern void set_current_inferior (struct inferior *);
|
||
|
||
extern struct cleanup *save_current_inferior (void);
|
||
|
||
/* Traverse all inferiors. */
|
||
|
||
#define ALL_INFERIORS(I) \
|
||
for ((I) = inferior_list; (I); (I) = (I)->next)
|
||
|
||
extern struct inferior *inferior_list;
|
||
|
||
/* Prune away automatically added inferiors that aren't required
|
||
anymore. */
|
||
extern void prune_inferiors (void);
|
||
|
||
extern int number_of_inferiors (void);
|
||
|
||
extern struct inferior *add_inferior_with_spaces (void);
|
||
|
||
#endif /* !defined (INFERIOR_H) */
|