632 lines
21 KiB
C
632 lines
21 KiB
C
/* Variables that describe the inferior process running under GDB:
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Where it is, why it stopped, and how to step it.
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Copyright (C) 1986, 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995, 1996,
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1998, 1999, 2000, 2001, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010
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Free Software Foundation, Inc.
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This file is part of GDB.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>. */
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#if !defined (INFERIOR_H)
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#define INFERIOR_H 1
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struct target_waitstatus;
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struct frame_info;
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struct ui_file;
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struct type;
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struct gdbarch;
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struct regcache;
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struct ui_out;
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struct terminal_info;
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/* For bpstat. */
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#include "breakpoint.h"
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/* For enum target_signal. */
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#include "target.h"
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/* For struct frame_id. */
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#include "frame.h"
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#include "progspace.h"
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/* Two structures are used to record inferior state.
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inferior_thread_state contains state about the program itself like its
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registers and any signal it received when it last stopped.
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This state must be restored regardless of how the inferior function call
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ends (either successfully, or after it hits a breakpoint or signal)
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if the program is to properly continue where it left off.
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inferior_status contains state regarding gdb's control of the inferior
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itself like stepping control. It also contains session state like the
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user's currently selected frame.
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Call these routines around hand called functions, including function calls
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in conditional breakpoints for example. */
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struct inferior_thread_state;
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struct inferior_status;
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extern struct inferior_thread_state *save_inferior_thread_state (void);
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extern struct inferior_status *save_inferior_status (void);
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extern void restore_inferior_thread_state (struct inferior_thread_state *);
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extern void restore_inferior_status (struct inferior_status *);
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extern struct cleanup *make_cleanup_restore_inferior_thread_state (struct inferior_thread_state *);
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extern struct cleanup *make_cleanup_restore_inferior_status (struct inferior_status *);
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extern void discard_inferior_thread_state (struct inferior_thread_state *);
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extern void discard_inferior_status (struct inferior_status *);
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extern struct regcache *get_inferior_thread_state_regcache (struct inferior_thread_state *);
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/* The -1 ptid, often used to indicate either an error condition
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or a "don't care" condition, i.e, "run all threads." */
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extern ptid_t minus_one_ptid;
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/* The null or zero ptid, often used to indicate no process. */
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extern ptid_t null_ptid;
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/* Attempt to find and return an existing ptid with the given PID, LWP,
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and TID components. If none exists, create a new one and return
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that. */
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ptid_t ptid_build (int pid, long lwp, long tid);
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/* Find/Create a ptid from just a pid. */
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ptid_t pid_to_ptid (int pid);
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/* Fetch the pid (process id) component from a ptid. */
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int ptid_get_pid (ptid_t ptid);
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/* Fetch the lwp (lightweight process) component from a ptid. */
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long ptid_get_lwp (ptid_t ptid);
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/* Fetch the tid (thread id) component from a ptid. */
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long ptid_get_tid (ptid_t ptid);
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/* Compare two ptids to see if they are equal */
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extern int ptid_equal (ptid_t p1, ptid_t p2);
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/* Return true if PTID represents a process id. */
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extern int ptid_is_pid (ptid_t ptid);
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/* Returns true if PTID matches filter FILTER. FILTER can be the wild
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card MINUS_ONE_PTID (all ptid match it); can be a ptid representing
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a process (ptid_is_pid returns true), in which case, all lwps and
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threads of that given process match, lwps and threads of other
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processes do not; or, it can represent a specific thread, in which
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case, only that thread will match true. PTID must represent a
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specific LWP or THREAD, it can never be a wild card. */
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extern int ptid_match (ptid_t ptid, ptid_t filter);
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/* Save value of inferior_ptid so that it may be restored by
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a later call to do_cleanups(). Returns the struct cleanup
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pointer needed for later doing the cleanup. */
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extern struct cleanup * save_inferior_ptid (void);
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extern void set_sigint_trap (void);
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extern void clear_sigint_trap (void);
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/* Set/get file name for default use for standard in/out in the inferior. */
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extern void set_inferior_io_terminal (const char *terminal_name);
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extern const char *get_inferior_io_terminal (void);
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/* Collected pid, tid, etc. of the debugged inferior. When there's
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no inferior, PIDGET (inferior_ptid) will be 0. */
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extern ptid_t inferior_ptid;
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/* Are we simulating synchronous execution? This is used in async gdb
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to implement the 'run', 'continue' etc commands, which will not
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redisplay the prompt until the execution is actually over. */
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extern int sync_execution;
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/* Inferior environment. */
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extern void clear_proceed_status (void);
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extern void proceed (CORE_ADDR, enum target_signal, int);
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extern int sched_multi;
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/* When set, stop the 'step' command if we enter a function which has
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no line number information. The normal behavior is that we step
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over such function. */
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extern int step_stop_if_no_debug;
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/* If set, the inferior should be controlled in non-stop mode. In
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this mode, each thread is controlled independently. Execution
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commands apply only to the the selected thread by default, and stop
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events stop only the thread that had the event -- the other threads
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are kept running freely. */
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extern int non_stop;
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/* If set (default), when following a fork, GDB will detach from one
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the fork branches, child or parent. Exactly which branch is
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detached depends on 'set follow-fork-mode' setting. */
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extern int detach_fork;
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extern void generic_mourn_inferior (void);
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extern void terminal_save_ours (void);
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extern void terminal_ours (void);
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extern CORE_ADDR unsigned_pointer_to_address (struct gdbarch *gdbarch,
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struct type *type,
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const gdb_byte *buf);
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extern void unsigned_address_to_pointer (struct gdbarch *gdbarch,
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struct type *type, gdb_byte *buf,
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CORE_ADDR addr);
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extern CORE_ADDR signed_pointer_to_address (struct gdbarch *gdbarch,
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struct type *type,
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const gdb_byte *buf);
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extern void address_to_signed_pointer (struct gdbarch *gdbarch,
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struct type *type, gdb_byte *buf,
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CORE_ADDR addr);
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extern void wait_for_inferior (int treat_exec_as_sigtrap);
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extern void prepare_for_detach (void);
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extern void fetch_inferior_event (void *);
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extern void init_wait_for_inferior (void);
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extern void close_exec_file (void);
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extern void reopen_exec_file (void);
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/* The `resume' routine should only be called in special circumstances.
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Normally, use `proceed', which handles a lot of bookkeeping. */
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extern void resume (int, enum target_signal);
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/* From misc files */
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extern void default_print_registers_info (struct gdbarch *gdbarch,
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struct ui_file *file,
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struct frame_info *frame,
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int regnum, int all);
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extern void child_terminal_info (char *, int);
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extern void term_info (char *, int);
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extern void terminal_ours_for_output (void);
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extern void terminal_inferior (void);
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extern void terminal_init_inferior (void);
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extern void terminal_init_inferior_with_pgrp (int pgrp);
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/* From fork-child.c */
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extern int fork_inferior (char *, char *, char **,
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void (*)(void),
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void (*)(int), void (*)(void), char *);
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extern void startup_inferior (int);
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extern char *construct_inferior_arguments (int, char **);
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/* From infrun.c */
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extern void start_remote (int from_tty);
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extern void normal_stop (void);
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extern int signal_stop_state (int);
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extern int signal_print_state (int);
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extern int signal_pass_state (int);
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extern int signal_stop_update (int, int);
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extern int signal_print_update (int, int);
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extern int signal_pass_update (int, int);
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extern void get_last_target_status(ptid_t *ptid,
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struct target_waitstatus *status);
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extern void follow_inferior_reset_breakpoints (void);
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/* Throw an error indicating the current thread is running. */
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extern void error_is_running (void);
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/* Calls error_is_running if the current thread is running. */
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extern void ensure_not_running (void);
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void set_step_info (struct frame_info *frame, struct symtab_and_line sal);
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/* From infcmd.c */
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extern void post_create_inferior (struct target_ops *, int);
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extern void attach_command (char *, int);
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extern char *get_inferior_args (void);
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extern void set_inferior_args (char *);
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extern void set_inferior_args_vector (int, char **);
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extern void registers_info (char *, int);
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extern void nexti_command (char *, int);
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extern void stepi_command (char *, int);
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extern void continue_1 (int all_threads);
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extern void continue_command (char *, int);
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extern void interrupt_target_command (char *args, int from_tty);
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extern void interrupt_target_1 (int all_threads);
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extern void detach_command (char *, int);
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extern void notice_new_inferior (ptid_t, int, int);
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/* Address at which inferior stopped. */
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extern CORE_ADDR stop_pc;
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/* Nonzero if stopped due to completion of a stack dummy routine. */
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extern int stop_stack_dummy;
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/* Nonzero if program stopped due to a random (unexpected) signal in
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inferior process. */
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extern int stopped_by_random_signal;
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/* STEP_OVER_ALL means step over all subroutine calls.
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STEP_OVER_UNDEBUGGABLE means step over calls to undebuggable functions.
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STEP_OVER_NONE means don't step over any subroutine calls. */
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enum step_over_calls_kind
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{
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STEP_OVER_NONE,
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STEP_OVER_ALL,
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STEP_OVER_UNDEBUGGABLE
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};
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/* Anything but NO_STOP_QUIETLY means we expect a trap and the caller
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will handle it themselves. STOP_QUIETLY is used when running in
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the shell before the child program has been exec'd and when running
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through shared library loading. STOP_QUIETLY_REMOTE is used when
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setting up a remote connection; it is like STOP_QUIETLY_NO_SIGSTOP
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except that there is no need to hide a signal. */
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/* It is also used after attach, due to attaching to a process. This
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is a bit trickier. When doing an attach, the kernel stops the
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debuggee with a SIGSTOP. On newer GNU/Linux kernels (>= 2.5.61)
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the handling of SIGSTOP for a ptraced process has changed. Earlier
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versions of the kernel would ignore these SIGSTOPs, while now
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SIGSTOP is treated like any other signal, i.e. it is not muffled.
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If the gdb user does a 'continue' after the 'attach', gdb passes
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the global variable stop_signal (which stores the signal from the
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attach, SIGSTOP) to the ptrace(PTRACE_CONT,...) call. This is
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problematic, because the kernel doesn't ignore such SIGSTOP
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now. I.e. it is reported back to gdb, which in turn presents it
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back to the user.
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To avoid the problem, we use STOP_QUIETLY_NO_SIGSTOP, which allows
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gdb to clear the value of stop_signal after the attach, so that it
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is not passed back down to the kernel. */
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enum stop_kind
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{
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NO_STOP_QUIETLY = 0,
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STOP_QUIETLY,
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STOP_QUIETLY_REMOTE,
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STOP_QUIETLY_NO_SIGSTOP
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};
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/* Reverse execution. */
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enum exec_direction_kind
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{
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EXEC_FORWARD,
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EXEC_REVERSE,
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EXEC_ERROR
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};
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extern enum exec_direction_kind execution_direction;
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/* Save register contents here when executing a "finish" command or are
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about to pop a stack dummy frame, if-and-only-if proceed_to_finish is set.
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Thus this contains the return value from the called function (assuming
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values are returned in a register). */
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extern struct regcache *stop_registers;
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/* True if we are debugging displaced stepping. */
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extern int debug_displaced;
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/* Dump LEN bytes at BUF in hex to FILE, followed by a newline. */
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void displaced_step_dump_bytes (struct ui_file *file,
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const gdb_byte *buf, size_t len);
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/* Possible values for gdbarch_call_dummy_location. */
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#define ON_STACK 1
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#define AT_ENTRY_POINT 4
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#define AT_SYMBOL 5
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/* If STARTUP_WITH_SHELL is set, GDB's "run"
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will attempts to start up the debugee under a shell.
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This is in order for argument-expansion to occur. E.g.,
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(gdb) run *
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The "*" gets expanded by the shell into a list of files.
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While this is a nice feature, it turns out to interact badly
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with some of the catch-fork/catch-exec features we have added.
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In particular, if the shell does any fork/exec's before
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the exec of the target program, that can confuse GDB.
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To disable this feature, set STARTUP_WITH_SHELL to 0.
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To enable this feature, set STARTUP_WITH_SHELL to 1.
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The catch-exec traps expected during start-up will
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be 1 if target is not started up with a shell, 2 if it is.
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- RT
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If you disable this, you need to decrement
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START_INFERIOR_TRAPS_EXPECTED in tm.h. */
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#define STARTUP_WITH_SHELL 1
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#if !defined(START_INFERIOR_TRAPS_EXPECTED)
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#define START_INFERIOR_TRAPS_EXPECTED 2
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#endif
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struct private_inferior;
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/* GDB represents the state of each program execution with an object
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called an inferior. An inferior typically corresponds to a process
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but is more general and applies also to targets that do not have a
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notion of processes. Each run of an executable creates a new
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inferior, as does each attachment to an existing process.
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Inferiors have unique internal identifiers that are different from
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target process ids. Each inferior may in turn have multiple
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threads running in it. */
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struct inferior
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{
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/* Pointer to next inferior in singly-linked list of inferiors. */
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struct inferior *next;
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/* Convenient handle (GDB inferior id). Unique across all
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inferiors. */
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int num;
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/* Actual target inferior id, usually, a process id. This matches
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the ptid_t.pid member of threads of this inferior. */
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int pid;
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/* True if this was an auto-created inferior, e.g. created from
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following a fork; false, if this inferior was manually added by
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the user, and we should not attempt to prune it
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automatically. */
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int removable;
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/* The address space bound to this inferior. */
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struct address_space *aspace;
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/* The program space bound to this inferior. */
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struct program_space *pspace;
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/* The arguments string to use when running. */
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char *args;
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/* The size of elements in argv. */
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int argc;
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/* The vector version of arguments. If ARGC is nonzero,
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then we must compute ARGS from this (via the target).
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This is always coming from main's argv and therefore
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should never be freed. */
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char **argv;
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/* The name of terminal device to use for I/O. */
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char *terminal;
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/* Environment to use for running inferior,
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in format described in environ.h. */
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struct gdb_environ *environment;
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/* See the definition of stop_kind above. */
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enum stop_kind stop_soon;
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/* Nonzero if this child process was attached rather than
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forked. */
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int attach_flag;
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/* If this inferior is a vfork child, then this is the pointer to
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its vfork parent, if GDB is still attached to it. */
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struct inferior *vfork_parent;
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/* If this process is a vfork parent, this is the pointer to the
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child. Since a vfork parent is left frozen by the kernel until
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the child execs or exits, a process can only have one vfork child
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at a given time. */
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struct inferior *vfork_child;
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/* True if this inferior should be detached when it's vfork sibling
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exits or execs. */
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int pending_detach;
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/* True if this inferior is a vfork parent waiting for a vfork child
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not under our control to be done with the shared memory region,
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either by exiting or execing. */
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int waiting_for_vfork_done;
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/* True if we're in the process of detaching from this inferior. */
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int detaching;
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/* What is left to do for an execution command after any thread of
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this inferior stops. For continuations associated with a
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specific thread, see `struct thread_info'. */
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struct continuation *continuations;
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/* Private data used by the target vector implementation. */
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struct private_inferior *private;
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/* We keep a count of the number of times the user has requested a
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particular syscall to be tracked, and pass this information to the
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target. This lets capable targets implement filtering directly. */
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/* Number of times that "any" syscall is requested. */
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int any_syscall_count;
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/* Count of each system call. */
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VEC(int) *syscalls_counts;
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/* This counts all syscall catch requests, so we can readily determine
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if any catching is necessary. */
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int total_syscalls_count;
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/* Per inferior data-pointers required by other GDB modules. */
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void **data;
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unsigned num_data;
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};
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/* Keep a registry of per-inferior data-pointers required by other GDB
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modules. */
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extern const struct inferior_data *register_inferior_data (void);
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extern const struct inferior_data *register_inferior_data_with_cleanup
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(void (*cleanup) (struct inferior *, void *));
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extern void clear_inferior_data (struct inferior *inf);
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extern void set_inferior_data (struct inferior *inf,
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const struct inferior_data *data, void *value);
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extern void *inferior_data (struct inferior *inf,
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const struct inferior_data *data);
|
||
|
||
/* 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 by GDB 'num'. */
|
||
extern struct inferior *find_inferior_id (int num);
|
||
|
||
/* Find an inferior bound to PSPACE. */
|
||
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 *);
|
||
|
||
/* 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);
|
||
|
||
extern void set_current_inferior (struct inferior *);
|
||
|
||
extern struct cleanup *save_current_inferior (void);
|
||
|
||
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) */
|