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, 2007, 2008, 2009
- Free Software Foundation, Inc.
+ 1998, 1999, 2000, 2001, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010,
+ 2011 Free Software Foundation, Inc.
This file is part of GDB.
/* For struct frame_id. */
#include "frame.h"
-/* Two structures are used to record inferior state.
+#include "progspace.h"
- 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.
+struct infcall_suspend_state;
+struct infcall_control_state;
- 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.
+extern struct infcall_suspend_state *save_infcall_suspend_state (void);
+extern struct infcall_control_state *save_infcall_control_state (void);
- Call these routines around hand called functions, including function calls
- in conditional breakpoints for example. */
+extern void restore_infcall_suspend_state (struct infcall_suspend_state *);
+extern void restore_infcall_control_state (struct infcall_control_state *);
-struct inferior_thread_state;
-struct inferior_status;
+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 struct inferior_thread_state *save_inferior_thread_state (void);
-extern struct inferior_status *save_inferior_status (void);
+extern void discard_infcall_suspend_state (struct infcall_suspend_state *);
+extern void discard_infcall_control_state (struct infcall_control_state *);
-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 struct regcache *get_inferior_thread_state_regcache (struct inferior_thread_state *);
+extern struct regcache *
+ get_infcall_suspend_state_regcache (struct infcall_suspend_state *);
/* 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. */
+/* 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,
that. */
ptid_t ptid_build (int pid, long lwp, long tid);
-/* Find/Create a ptid from just a pid. */
+/* Find/Create a ptid from just a pid. */
ptid_t pid_to_ptid (int pid);
-/* Fetch the pid (process id) component from a ptid. */
+/* Fetch the pid (process id) component from a ptid. */
int ptid_get_pid (ptid_t ptid);
-/* Fetch the lwp (lightweight process) component from a ptid. */
+/* Fetch the lwp (lightweight process) component from a ptid. */
long ptid_get_lwp (ptid_t ptid);
-/* Fetch the tid (thread id) component from a ptid. */
+/* Fetch the tid (thread id) component from a ptid. */
long ptid_get_tid (ptid_t ptid);
-/* Compare two ptids to see if they are equal */
+/* 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);
+/* Returns true if PTID matches filter FILTER. FILTER can be the wild
+ card MINUS_ONE_PTID (all ptid match it); can be a ptid representing
+ a process (ptid_is_pid returns true), in which case, all lwps and
+ threads of that given process match, lwps and threads of other
+ processes do not; or, it can represent a specific thread, in which
+ case, only that thread will match true. PTID must represent a
+ specific LWP or THREAD, it can never be a wild card. */
+
+extern int ptid_match (ptid_t ptid, ptid_t filter);
+
/* 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 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, PIDGET (inferior_ptid) will be 0. */
extern ptid_t inferior_ptid;
/* 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. */
+ redisplay the prompt until the execution is actually over. */
extern int sync_execution;
-/* Inferior environment. */
-
-extern struct gdb_environ *inferior_environ;
+/* Inferior environment. */
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. */
are kept running freely. */
extern int non_stop;
+/* If set (default), when following a fork, GDB will detach from one
+ the fork branches, child or parent. Exactly which branch is
+ detached depends on 'set follow-fork-mode' setting. */
+extern int detach_fork;
+
extern void generic_mourn_inferior (void);
extern void terminal_save_ours (void);
extern void terminal_ours (void);
-extern CORE_ADDR unsigned_pointer_to_address (struct type *type,
+extern CORE_ADDR unsigned_pointer_to_address (struct gdbarch *gdbarch,
+ struct type *type,
const gdb_byte *buf);
-extern void unsigned_address_to_pointer (struct type *type, 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,
+extern CORE_ADDR signed_pointer_to_address (struct gdbarch *gdbarch,
+ struct type *type,
const gdb_byte *buf);
-extern void address_to_signed_pointer (struct type *type, 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 (int treat_exec_as_sigtrap);
+extern void prepare_for_detach (void);
+
extern void fetch_inferior_event (void *);
extern void init_wait_for_inferior (void);
extern void terminal_init_inferior_with_pgrp (int pgrp);
-/* 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 int fork_inferior (char *, char *, char **,
extern void startup_inferior (int);
-extern char *construct_inferior_arguments (struct gdbarch *, int, char **);
+extern char *construct_inferior_arguments (int, char **);
/* From infrun.c */
+extern int debug_infrun;
+
+extern int stop_on_solib_events;
+
extern void start_remote (int from_tty);
extern void normal_stop (void);
/* Calls error_is_running if the current thread is running. */
extern void ensure_not_running (void);
-/* From infcmd.c */
+void set_step_info (struct frame_info *frame, struct symtab_and_line sal);
-extern void tty_command (char *, int);
+/* From infcmd.c */
extern void post_create_inferior (struct target_ops *, int);
extern char *get_inferior_args (void);
-extern char *set_inferior_args (char *);
+extern void set_inferior_args (char *);
extern void set_inferior_args_vector (int, char **);
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);
/* Nonzero if stopped due to completion of a stack dummy routine. */
-extern int stop_stack_dummy;
+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;
-/* 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
{
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
+/* 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
+ 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.
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
+ 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
/* 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.,
+ 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
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. */
+ START_INFERIOR_TRAPS_EXPECTED in tm.h. */
#define STARTUP_WITH_SHELL 1
#if !defined(START_INFERIOR_TRAPS_EXPECTED)
#define START_INFERIOR_TRAPS_EXPECTED 2
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'. */
+
+struct inferior_suspend_state
+{
+};
+
/* 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
the ptid_t.pid member of threads of this inferior. */
int pid;
- /* See the definition of stop_kind above. */
- enum stop_kind stop_soon;
+ /* 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'. */
+ struct inferior_suspend_state suspend;
+
+ /* 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;
- /* 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;
+
+ /* We keep a count of the number of times the user has requested a
+ particular syscall to be tracked, and pass this information to the
+ target. This lets capable targets implement filtering directly. */
+
+ /* Number of times that "any" syscall is requested. */
+ int any_syscall_count;
+
+ /* Count of each system call. */
+ VEC(int) *syscalls_counts;
+
+ /* This counts all syscall catch requests, so we can readily determine
+ if any catching is necessary. */
+ int total_syscalls_count;
+
+ /* Per inferior data-pointers required by other GDB modules. */
+ void **data;
+ unsigned num_data;
};
+/* Keep a registry of per-inferior data-pointers required by other GDB
+ modules. */
+
+extern const struct inferior_data *register_inferior_data (void);
+extern const struct inferior_data *register_inferior_data_with_cleanup
+ (void (*cleanup) (struct inferior *, void *));
+extern void clear_inferior_data (struct inferior *inf);
+extern void set_inferior_data (struct inferior *inf,
+ const struct inferior_data *data, void *value);
+extern void *inferior_data (struct inferior *inf,
+ const struct inferior_data *data);
+
/* Create an empty inferior list, or empty the existing one. */
extern void init_inferior_list (void);
/* 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);
not the system's). */
extern int valid_gdb_inferior_id (int num);
-/* Search function to lookup a inferior by target 'pid'. */
+/* 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
/* 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);
+
+extern void update_observer_mode (void);
+
#endif /* !defined (INFERIOR_H) */
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