/* Variables that describe the inferior process running under GDB:
Where it is, why it stopped, and how to step it.
- Copyright 1986, 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995,
- 1996, 1998, 1999, 2000, 2001, 2003 Free Software Foundation, Inc.
+ Copyright (C) 1986, 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995, 1996,
+ 1998, 1999, 2000, 2001, 2003, 2004, 2005, 2006, 2007, 2008, 2009
+ 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., 59 Temple Place - Suite 330,
- Boston, MA 02111-1307, 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;
/* For bpstat. */
#include "breakpoint.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".
+/* Two structures are used to record inferior state.
- 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. */
+ inferior_thread_state contains state about the program itself like its
+ registers and any signal it received when it last stopped.
+ This state must be restored regardless of how the inferior function call
+ ends (either successfully, or after it hits a breakpoint or signal)
+ if the program is to properly continue where it left off.
+ inferior_status contains state regarding gdb's control of the inferior
+ itself like stepping control. It also contains session state like the
+ user's currently selected frame.
+
+ Call these routines around hand called functions, including function calls
+ in conditional breakpoints for example. */
+
+struct inferior_thread_state;
struct inferior_status;
-extern struct inferior_status *save_inferior_status (int);
+extern struct inferior_thread_state *save_inferior_thread_state (void);
+extern struct inferior_status *save_inferior_status (void);
+extern void restore_inferior_thread_state (struct inferior_thread_state *);
extern void restore_inferior_status (struct inferior_status *);
+extern struct cleanup *make_cleanup_restore_inferior_thread_state (struct inferior_thread_state *);
extern struct cleanup *make_cleanup_restore_inferior_status (struct inferior_status *);
+extern void discard_inferior_thread_state (struct inferior_thread_state *);
extern void discard_inferior_status (struct inferior_status *);
-extern void write_inferior_status_register (struct inferior_status
- *inf_status, int regno,
- LONGEST val);
+extern struct regcache *get_inferior_thread_state_regcache (struct inferior_thread_state *);
/* The -1 ptid, often used to indicate either an error condition
or a "don't care" condition, i.e, "run all threads." */
/* Compare two ptids to see if they are equal */
extern int ptid_equal (ptid_t p1, ptid_t p2);
+/* Return true if PTID represents a process id. */
+extern int ptid_is_pid (ptid_t ptid);
+
/* 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 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. */
-/* File name for default use for standard in/out in the inferior. */
-
-extern char *inferior_io_terminal;
+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. */
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;
-
-/* This is only valid when inferior_ignoring_startup_exec_events is
- zero.
-
- 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;
-
/* Inferior environment. */
-extern struct environ *inferior_environ;
+extern struct gdb_environ *inferior_environ;
extern void clear_proceed_status (void);
extern void proceed (CORE_ADDR, enum target_signal, int);
+extern int sched_multi;
+
/* 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 kill_inferior (void);
+/* If set, the inferior should be controlled in non-stop mode. In
+ this mode, each thread is controlled independently. Execution
+ commands apply only to the the selected thread by default, and stop
+ events stop only the thread that had the event -- the other threads
+ are kept running freely. */
+extern int non_stop;
extern void generic_mourn_inferior (void);
extern void terminal_ours (void);
-extern CORE_ADDR read_pc (void);
-
-extern CORE_ADDR read_pc_pid (ptid_t);
-
-extern void write_pc (CORE_ADDR);
-
-extern void write_pc_pid (CORE_ADDR, ptid_t);
-
-extern void generic_target_write_pc (CORE_ADDR, ptid_t);
-
-extern CORE_ADDR read_sp (void);
-
-extern void deprecated_write_sp (CORE_ADDR);
-
-extern CORE_ADDR deprecated_read_fp (void);
-
-extern CORE_ADDR unsigned_pointer_to_address (struct type *type, const void *buf);
-
-extern void unsigned_address_to_pointer (struct type *type, void *buf,
+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 type *type,
- const void *buf);
-extern void address_to_signed_pointer (struct type *type, void *buf,
+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 wait_for_inferior (void);
+extern void wait_for_inferior (int treat_exec_as_sigtrap);
extern void fetch_inferior_event (void *);
struct frame_info *frame,
int regnum, int all);
-extern void store_inferior_registers (int);
-
-extern void fetch_inferior_registers (int);
-
-extern void solib_create_inferior_hook (void);
-
extern void child_terminal_info (char *, int);
extern void term_info (char *, int);
extern void terminal_init_inferior_with_pgrp (int pgrp);
-/* From infptrace.c or infttrace.c */
-
-extern int attach (int);
-
-extern void detach (int);
-
-/* PTRACE method of waiting for inferior process. */
-int ptrace_wait (ptid_t, int *);
-
-extern void child_resume (ptid_t, int, enum target_signal);
-
-#ifndef PTRACE_ARG3_TYPE
-#define PTRACE_ARG3_TYPE int /* Correct definition for most systems. */
-#endif
-
-extern int call_ptrace (int, int, PTRACE_ARG3_TYPE, int);
-
-extern void pre_fork_inferior (void);
-
-/* From procfs.c */
-
-extern int proc_iterate_over_mappings (int (*)(int, CORE_ADDR));
-
-extern ptid_t procfs_first_available (void);
-
/* From fork-child.c */
-extern void fork_inferior (char *, char *, char **,
- void (*)(void),
- void (*)(int), void (*)(void), char *);
+extern int fork_inferior (char *, char *, char **,
+ void (*)(void),
+ void (*)(int), void (*)(void), char *);
extern void startup_inferior (int);
-extern char *construct_inferior_arguments (struct gdbarch *, int, char **);
-
-/* From inflow.c */
-
-extern void new_tty_prefork (char *);
-
-extern int gdb_has_a_terminal (void);
+extern char *construct_inferior_arguments (int, char **);
/* From infrun.c */
-extern void start_remote (void);
+extern void start_remote (int from_tty);
extern void normal_stop (void);
extern void follow_inferior_reset_breakpoints (void);
+/* Throw an error indicating the current thread is running. */
+extern void error_is_running (void);
+
+/* Calls error_is_running if the current thread is running. */
+extern void ensure_not_running (void);
+
+void set_step_info (struct frame_info *frame, struct symtab_and_line sal);
+
/* From infcmd.c */
extern void tty_command (char *, int);
+extern void post_create_inferior (struct target_ops *, int);
+
extern void attach_command (char *, int);
extern char *get_inferior_args (void);
extern void stepi_command (char *, int);
+extern void continue_1 (int all_threads);
+
extern void continue_command (char *, int);
extern void interrupt_target_command (char *args, int from_tty);
-/* Last signal that the inferior received (why it stopped). */
+extern void interrupt_target_1 (int all_threads);
+
+extern void detach_command (char *, int);
-extern enum target_signal stop_signal;
+extern void notice_new_inferior (ptid_t, int, int);
/* Address at which inferior stopped. */
extern CORE_ADDR stop_pc;
-/* Chain containing status of breakpoint(s) that we have stopped at. */
-
-extern bpstat stop_bpstat;
-
-/* Flag indicating that a command has proceeded the inferior past the
- current breakpoint. */
-
-extern int breakpoint_proceeded;
-
-/* Nonzero if stopped due to a step command. */
-
-extern int stop_step;
-
/* Nonzero if stopped due to completion of a stack dummy routine. */
extern int stop_stack_dummy;
extern int stopped_by_random_signal;
-/* 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.
-
- 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.). */
-
-extern CORE_ADDR step_range_start; /* Inclusive */
-extern CORE_ADDR step_range_end; /* Exclusive */
-
-/* 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;
-
-/* 1 means step over all subroutine calls.
- -1 means step over calls to undebuggable functions. */
+/* 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_UNDEBUGGABLE
};
-extern enum step_over_calls_kind step_over_calls;
-
-/* If stepping, nonzero means step count is > 1
- so don't print frame next time inferior stops
- if it stops due to stepping. */
-
-extern int step_multi;
-
-/* 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?). */
+/* 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. */
/* 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
{
NO_STOP_QUIETLY = 0,
STOP_QUIETLY,
+ STOP_QUIETLY_REMOTE,
STOP_QUIETLY_NO_SIGSTOP
};
-extern enum stop_kind stop_soon;
-
-/* Nonzero if proceed is being used for a "finish" command or a similar
- situation when stop_registers should be saved. */
+/* Reverse execution. */
+enum exec_direction_kind
+ {
+ EXEC_FORWARD,
+ EXEC_REVERSE,
+ EXEC_ERROR
+ };
-extern int proceed_to_finish;
+extern enum exec_direction_kind execution_direction;
-/* Save register contents here when about to pop a stack dummy frame,
- if-and-only-if proceed_to_finish is set.
+/* Save register contents here when executing a "finish" command or are
+ 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 struct regcache *stop_registers;
-/* Nonzero if the child process in inferior_ptid was attached rather
- than forked. */
+/* True if we are debugging displaced stepping. */
+extern int debug_displaced;
+
+/* Dump LEN bytes at BUF in hex to FILE, followed by a newline. */
+void displaced_step_dump_bytes (struct ui_file *file,
+ const gdb_byte *buf, size_t len);
-extern int attach_flag;
\f
-/* Possible values for CALL_DUMMY_LOCATION. */
+/* Possible values for gdbarch_call_dummy_location. */
#define ON_STACK 1
#define AT_ENTRY_POINT 4
#define AT_SYMBOL 5
-/* FIXME: cagney/2000-04-17: gdbarch should manage this. The default
- shouldn't be necessary. */
-
-#if !defined STORE_STRUCT_RETURN
-#define STORE_STRUCT_RETURN(a1,a2) (internal_error (__FILE__, __LINE__, "STORE_STRUCT_RETURN"), 0)
-#endif
-
-
/* 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.,
#if !defined(START_INFERIOR_TRAPS_EXPECTED)
#define START_INFERIOR_TRAPS_EXPECTED 2
#endif
+
+struct private_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. */
+
+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;
+
+ /* See the definition of stop_kind above. */
+ enum stop_kind stop_soon;
+
+ /* Nonzero if this child process was attached rather than
+ forked. */
+ int attach_flag;
+
+ /* 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;
+
+ /* Terminal info and state managed by inflow.c. */
+ struct terminal_info *terminal_info;
+
+ /* Private data used by the target vector implementation. */
+ struct private_inferior *private;
+};
+
+/* 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);
+
+/* 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);
+
+/* 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 a inferior by target 'pid'. */
+extern struct inferior *find_inferior_pid (int pid);
+
+/* 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 *);
+
+/* Prints the list of inferiors and their details on UIOUT.
+
+ If REQUESTED_INFERIOR is not -1, it's the GDB id of the inferior
+ that should be printed. Otherwise, all inferiors are printed. */
+extern void print_inferior (struct ui_out *uiout, int requested_inferior);
+
+/* 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);
+
#endif /* !defined (INFERIOR_H) */
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