/* 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, 2009, 2010,
- 2011 Free Software Foundation, Inc.
+ Copyright (C) 1986-2014 Free Software Foundation, Inc.
This file is part of GDB.
struct regcache;
struct ui_out;
struct terminal_info;
+struct target_desc_info;
/* For bpstat. */
#include "breakpoint.h"
-/* For enum target_signal. */
+/* For enum gdb_signal. */
#include "target.h"
/* For struct frame_id. */
#include "frame.h"
#include "progspace.h"
+#include "registry.h"
struct infcall_suspend_state;
struct infcall_control_state;
extern struct 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. */
-extern ptid_t null_ptid;
-
-/* 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);
-
-/* Find/Create a ptid from just a pid. */
-ptid_t pid_to_ptid (int pid);
-
-/* 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. */
-long ptid_get_lwp (ptid_t 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. */
-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, 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 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;
-
-/* 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 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;
-
-/* 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 gdbarch *gdbarch,
struct type *type,
const gdb_byte *buf);
struct type *type, gdb_byte *buf,
CORE_ADDR addr);
-extern void wait_for_inferior (void);
-
-extern void prepare_for_detach (void);
-
-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);
-
-extern ptid_t user_visible_resume_ptid (int step);
-
-extern void insert_step_resume_breakpoint_at_sal (struct gdbarch *,
- struct symtab_and_line ,
- struct frame_id);
-
/* 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 child_terminal_ours (struct target_ops *self);
+
+extern void child_terminal_ours_for_output (struct target_ops *self);
-extern void terminal_inferior (void);
+extern void child_terminal_inferior (struct target_ops *self);
-extern void terminal_init_inferior (void);
+extern void child_terminal_init (struct target_ops *self);
-extern void terminal_init_inferior_with_pgrp (int pgrp);
+extern void child_terminal_init_with_pgrp (int pgrp);
/* From fork-child.c */
extern int fork_inferior (char *, char *, char **,
void (*)(void),
- void (*)(int), void (*)(void), char *);
+ void (*)(int), void (*)(void), char *,
+ void (*)(const char *,
+ char * const *, char * const *));
extern void startup_inferior (int);
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);
-
-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);
-
-extern int signal_pass_update (int, int);
-
-extern void get_last_target_status(ptid_t *ptid,
- struct target_waitstatus *status);
-
-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 post_create_inferior (struct target_ops *, int);
extern void registers_info (char *, int);
-extern void nexti_command (char *, int);
-
-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);
-
extern void interrupt_target_1 (int all_threads);
extern void delete_longjmp_breakpoint_cleanup (void *arg);
extern void notice_new_inferior (ptid_t, int, int);
+extern struct value *get_return_value (struct value *function,
+ struct type *value_type);
+
+/* Prepare for execution command. TARGET is the target that will run
+ the command. BACKGROUND determines whether this is a foreground
+ (synchronous) or background (asynchronous) command. */
+
+extern void prepare_execution_command (struct target_ops *target,
+ int background);
+
+/* Whether to start up the debuggee under a shell.
+
+ If startup-with-shell is set, GDB's "run" will attempt to start up
+ the debuggee under a shell.
+
+ This is in order for argument-expansion to occur. E.g.,
+
+ (gdb) run *
+
+ The "*" gets expanded by the shell into a list of files.
+
+ While this is a nice feature, it may be handy to bypass the shell
+ in some cases. To disable this feature, do "set startup-with-shell
+ false".
+
+ The catch-exec traps expected during start-up will be one more if
+ the target is started up with a shell. */
+extern int startup_with_shell;
+
/* Address at which inferior stopped. */
extern CORE_ADDR stop_pc;
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
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
- };
-
-/* The current execution direction. This should only be set to enum
- exec_direction_kind values. It is only an int to make it
- compatible with make_cleanup_restore_integer. */
-extern int execution_direction;
-
-/* 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;
-
-/* 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);
-
-struct displaced_step_closure *get_displaced_step_closure_by_addr (CORE_ADDR addr);
\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 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
/* Actual target inferior id, usually, a process id. This matches
the ptid_t.pid member of threads of this inferior. */
int pid;
+ /* True if the PID was actually faked by GDB. */
+ int fake_pid_p;
/* State of GDB control of inferior process execution.
See `struct inferior_control_state'. */
/* 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
int has_exit_code;
LONGEST exit_code;
- /* 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. */
+ /* 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;
- /* Number of times that "any" syscall is requested. */
- int any_syscall_count;
+ /* 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;
- /* Count of each system call. */
- VEC(int) *syscalls_counts;
+ /* The architecture associated with the inferior through the
+ connection to the target.
- /* This counts all syscall catch requests, so we can readily determine
- if any catching is necessary. */
- int total_syscalls_count;
+ 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. */
- void **data;
- unsigned num_data;
+ REGISTRY_FIELDS;
};
/* 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);
+DECLARE_REGISTRY (inferior);
/* Create an empty inferior list, or empty the existing one. */
extern void init_inferior_list (void);
/* Search function to lookup an inferior by GDB 'num'. */
extern struct inferior *find_inferior_id (int num);
-/* Find an inferior bound to PSPACE. */
+/* Find an inferior bound to PSPACE, giving preference to the current
+ inferior. */
extern struct inferior *
find_inferior_for_program_space (struct program_space *pspace);
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
extern struct inferior *add_inferior_with_spaces (void);
-extern void update_observer_mode (void);
-
#endif /* !defined (INFERIOR_H) */
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