/* Variables that describe the inferior process running under GDB:
Where it is, why it stopped, and how to step it.
- Copyright (C) 1986, 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995, 1996,
- 1998, 1999, 2000, 2001, 2003, 2004, 2005, 2006, 2007, 2008
- Free Software Foundation, Inc.
+ Copyright (C) 1986-2014 Free Software Foundation, Inc.
This file is part of GDB.
struct gdbarch;
struct regcache;
struct ui_out;
+struct terminal_info;
+struct target_desc_info;
+
+#include "ptid.h"
/* For bpstat. */
#include "breakpoint.h"
-/* For enum target_signal. */
+/* For enum gdb_signal. */
#include "target.h"
/* For struct frame_id. */
#include "frame.h"
-/* Structure in which to save the status of the inferior. Create/Save
- through "save_inferior_status", restore through
- "restore_inferior_status".
-
- 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. */
-
-struct inferior_status;
-
-extern struct inferior_status *save_inferior_status (int);
-
-extern void restore_inferior_status (struct inferior_status *);
-
-extern struct cleanup *make_cleanup_restore_inferior_status (struct inferior_status *);
-
-extern void discard_inferior_status (struct inferior_status *);
-
-/* 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;
+#include "progspace.h"
+#include "registry.h"
-/* The null or zero ptid, often used to indicate no process. */
-extern ptid_t null_ptid;
+struct infcall_suspend_state;
+struct infcall_control_state;
-/* Attempt to find and return an existing ptid with the given PID, LWP,
- and TID components. If none exists, create a new one and return
- that. */
-ptid_t ptid_build (int pid, long lwp, long tid);
+extern struct infcall_suspend_state *save_infcall_suspend_state (void);
+extern struct infcall_control_state *save_infcall_control_state (void);
-/* Find/Create a ptid from just a pid. */
-ptid_t pid_to_ptid (int pid);
+extern void restore_infcall_suspend_state (struct infcall_suspend_state *);
+extern void restore_infcall_control_state (struct infcall_control_state *);
-/* Fetch the pid (process id) component from a ptid. */
-int ptid_get_pid (ptid_t ptid);
+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 *);
-/* Fetch the lwp (lightweight process) component from a ptid. */
-long ptid_get_lwp (ptid_t ptid);
+extern void discard_infcall_suspend_state (struct infcall_suspend_state *);
+extern void discard_infcall_control_state (struct infcall_control_state *);
-/* 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 */
-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);
+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
extern void clear_sigint_trap (void);
-extern void set_sigio_trap (void);
-
-extern void clear_sigio_trap (void);
-
/* Set/get file name for default use for standard in/out in the inferior. */
extern void set_inferior_io_terminal (const char *terminal_name);
extern const char *get_inferior_io_terminal (void);
/* Collected pid, tid, etc. of the debugged inferior. When there's
- no inferior, PIDGET (inferior_ptid) will be 0. */
+ no inferior, ptid_get_pid (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. */
-extern int sync_execution;
-
-/* Inferior environment. */
-
-extern struct gdb_environ *inferior_environ;
-
-extern void clear_proceed_status (void);
-
-extern void proceed (CORE_ADDR, enum target_signal, int);
-
-/* 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;
-
-/* 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_save_ours (void);
-
-extern void terminal_ours (void);
-
-extern CORE_ADDR read_pc (void);
-
-extern void write_pc (CORE_ADDR);
-
-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 fetch_inferior_event (void *);
-
-extern void init_wait_for_inferior (void);
-
-extern void close_exec_file (void);
-
extern void reopen_exec_file (void);
-/* The `resume' routine should only be called in special circumstances.
- Normally, use `proceed', which handles a lot of bookkeeping. */
-
-extern void resume (int, enum target_signal);
-
/* From misc files */
extern void default_print_registers_info (struct gdbarch *gdbarch,
struct frame_info *frame,
int regnum, int all);
-extern void child_terminal_info (char *, int);
+extern void child_terminal_info (struct target_ops *self, const char *, int);
extern void term_info (char *, int);
-extern void terminal_ours_for_output (void);
-
-extern void terminal_inferior (void);
+extern void child_terminal_save_ours (struct target_ops *self);
-extern void terminal_init_inferior (void);
+extern void child_terminal_ours (struct target_ops *self);
-extern void terminal_init_inferior_with_pgrp (int pgrp);
+extern void child_terminal_ours_for_output (struct target_ops *self);
-/* From procfs.c */
+extern void child_terminal_inferior (struct target_ops *self);
-extern int proc_iterate_over_mappings (int (*)(int, CORE_ADDR));
+extern void child_terminal_init (struct target_ops *self);
-extern ptid_t procfs_first_available (void);
+extern void child_terminal_init_with_pgrp (int pgrp);
/* 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 *,
+ void (*)(const char *,
+ char * const *, char * const *));
extern void startup_inferior (int);
-extern char *construct_inferior_arguments (struct gdbarch *, int, char **);
-
-/* From inflow.c */
-
-extern void new_tty_prefork (const char *);
+extern char *construct_inferior_arguments (int, char **);
-extern int gdb_has_a_terminal (void);
-
-/* From infrun.c */
-
-extern void start_remote (int from_tty);
-
-extern void normal_stop (void);
-
-extern int signal_stop_state (int);
-
-extern int signal_print_state (int);
-
-extern int signal_pass_state (int);
-
-extern int signal_stop_update (int, int);
-
-extern int signal_print_update (int, int);
+/* From infcmd.c */
-extern int signal_pass_update (int, int);
+extern void post_create_inferior (struct target_ops *, int);
-extern void get_last_target_status(ptid_t *ptid,
- struct target_waitstatus *status);
+extern void attach_command (char *, int);
-extern void follow_inferior_reset_breakpoints (void);
+extern char *get_inferior_args (void);
-/* Throw an error indicating the current thread is running. */
-extern void error_is_running (void);
+extern void set_inferior_args (char *);
-/* Calls error_is_running if the current thread is running. */
-extern void ensure_not_running (void);
+extern void set_inferior_args_vector (int, char **);
-/* From infcmd.c */
+extern void registers_info (char *, int);
-extern void tty_command (char *, int);
+extern void continue_1 (int all_threads);
-extern void post_create_inferior (struct target_ops *, int);
+extern void interrupt_target_1 (int all_threads);
-extern void attach_command (char *, int);
+extern void delete_longjmp_breakpoint_cleanup (void *arg);
-extern char *get_inferior_args (void);
+extern void detach_command (char *, int);
-extern char *set_inferior_args (char *);
+extern void notice_new_inferior (ptid_t, int, int);
-extern void set_inferior_args_vector (int, char **);
+extern struct value *get_return_value (struct value *function,
+ struct type *value_type);
-extern void registers_info (char *, int);
+/* Whether to start up the debuggee under a shell.
-extern void nexti_command (char *, int);
+ If startup-with-shell is set, GDB's "run" will attempt to start up
+ the debuggee under a shell.
-extern void stepi_command (char *, int);
+ This is in order for argument-expansion to occur. E.g.,
-extern void continue_1 (int all_threads);
+ (gdb) run *
-extern void continue_command (char *, int);
+ The "*" gets expanded by the shell into a list of files.
-extern void interrupt_target_command (char *args, int from_tty);
+ 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".
-extern void interrupt_target_1 (int all_threads);
+ 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;
-/* Flag indicating that a command has proceeded the inferior past the
- current breakpoint. */
-
-extern int breakpoint_proceeded;
-
/* 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
- is a bit trickier. When doing an attach, the kernel stops the
- debuggee with a SIGSTOP. On newer GNU/Linux kernels (>= 2.5.61)
- the handling of SIGSTOP for a ptraced process has changed. Earlier
- versions of the kernel would ignore these SIGSTOPs, while now
- SIGSTOP is treated like any other signal, i.e. it is not muffled.
-
+/* 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
+ 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. */
STOP_QUIETLY_NO_SIGSTOP
};
-/* Reverse execution. */
-enum exec_direction_kind
- {
- EXEC_FORWARD,
- EXEC_REVERSE,
- EXEC_ERROR
- };
-
-extern enum exec_direction_kind execution_direction;
-
-/* Nonzero if proceed is being used for a "finish" command or a similar
- situation when stop_registers should be saved. */
-
-extern int proceed_to_finish;
-
-/* Save register contents here when about to pop a stack dummy frame,
- if-and-only-if proceed_to_finish is set.
- Thus this contains the return value from the called function (assuming
- values are returned in a register). */
-
-extern struct regcache *stop_registers;
-
-/* 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);
-
-
-/* When set, normal_stop will not call the normal_stop observer. */
-extern int suppress_stop_observer;
-
-/* When set, no calls to target_resumed observer will be made. */
-extern int suppress_resume_observer;
-
\f
/* Possible values for gdbarch_call_dummy_location. */
#define ON_STACK 1
#define AT_ENTRY_POINT 4
-#define AT_SYMBOL 5
-/* If STARTUP_WITH_SHELL is set, GDB's "run"
- will attempts to start up the debugee under a shell.
- This is in order for argument-expansion to occur. E.g.,
- (gdb) run *
- The "*" gets expanded by the shell into a list of files.
- While this is a nice feature, it turns out to interact badly
- with some of the catch-fork/catch-exec features we have added.
- In particular, if the shell does any fork/exec's before
- the exec of the target program, that can confuse GDB.
- To disable this feature, set STARTUP_WITH_SHELL to 0.
- To enable this feature, set STARTUP_WITH_SHELL to 1.
- The catch-exec traps expected during start-up will
- be 1 if target is not started up with a shell, 2 if it is.
- - RT
- If you disable this, you need to decrement
- START_INFERIOR_TRAPS_EXPECTED in tm.h. */
-#define STARTUP_WITH_SHELL 1
+/* 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 most implementations.
+ Overridden in nm.h files. */
#if !defined(START_INFERIOR_TRAPS_EXPECTED)
-#define START_INFERIOR_TRAPS_EXPECTED 2
+#define START_INFERIOR_TRAPS_EXPECTED 1
#endif
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
/* 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;
- /* 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'. */
+#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'. */
/* 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);
/* 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);
/* Boolean test for an already-known inferior id (GDB's homegrown id,
not the system's). */
-extern int valid_inferior_id (int num);
+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
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);
+
+/* 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) */
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