X-Git-Url: http://drtracing.org/?a=blobdiff_plain;f=gdb%2Finferior.h;h=571d26a1f84b80905f62eaf739847e8b01abc31f;hb=35fd2deb6916e972248d52b1bc1d584fa9059f8f;hp=77262eb9ea45bc12e10886185cada8d9ab90e531;hpb=d914c394a99165d5406c625a3675761e728b33b7;p=deliverable%2Fbinutils-gdb.git diff --git a/gdb/inferior.h b/gdb/inferior.h index 77262eb9ea..571d26a1f8 100644 --- a/gdb/inferior.h +++ b/gdb/inferior.h @@ -1,9 +1,7 @@ /* 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 - Free Software Foundation, Inc. + Copyright (C) 1986-2016 Free Software Foundation, Inc. This file is part of GDB. @@ -31,89 +29,39 @@ struct gdbarch; 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" -/* Two structures are used to record inferior state. +struct infcall_suspend_state; +struct infcall_control_state; - 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. +extern struct infcall_suspend_state *save_infcall_suspend_state (void); +extern struct infcall_control_state *save_infcall_control_state (void); - 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 void restore_infcall_suspend_state (struct infcall_suspend_state *); +extern void restore_infcall_control_state (struct infcall_control_state *); - Call these routines around hand called functions, including function calls - in conditional breakpoints for example. */ +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 *); -struct inferior_thread_state; -struct inferior_status; +extern void discard_infcall_suspend_state (struct infcall_suspend_state *); +extern void discard_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 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 *); - -/* 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); +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 @@ -130,46 +78,12 @@ 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 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 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); @@ -183,23 +97,8 @@ 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 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, @@ -207,89 +106,99 @@ extern void default_print_registers_info (struct gdbarch *gdbarch, struct frame_info *frame, int regnum, int all); -extern void child_terminal_info (char *, int); +/* Default implementation of gdbarch_print_float_info. Print + the values of all floating point registers. */ + +extern void default_print_float_info (struct gdbarch *gdbarch, + struct ui_file *file, + struct frame_info *frame, + const char *args); + +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 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); +/* From infcmd.c */ -extern int signal_stop_update (int, int); +/* Initial inferior setup. Determines the exec file is not yet known, + takes any necessary post-attaching actions, fetches the target + description and syncs the shared library list. */ -extern int signal_print_update (int, int); +extern void setup_inferior (int from_tty); -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 **); -void set_step_info (struct frame_info *frame, struct symtab_and_line sal); +extern void registers_info (char *, int); -/* From infcmd.c */ +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 void 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); +/* 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 nexti_command (char *, int); +extern void prepare_execution_command (struct target_ops *target, + int background); -extern void stepi_command (char *, int); +/* Whether to start up the debuggee under a shell. -extern void continue_1 (int all_threads); + If startup-with-shell is set, GDB's "run" will attempt to start up + the debuggee under a shell. -extern void continue_command (char *, int); + This is in order for argument-expansion to occur. E.g., -extern void interrupt_target_command (char *args, int from_tty); + (gdb) run * -extern void interrupt_target_1 (int all_threads); + The "*" gets expanded by the shell into a list of files. -extern void detach_command (char *, int); + 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 notice_new_inferior (ptid_t, int, int); + 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. */ @@ -322,20 +231,20 @@ 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. */ @@ -348,59 +257,29 @@ enum stop_kind STOP_QUIETLY_NO_SIGSTOP }; -/* Reverse execution. */ -enum exec_direction_kind - { - EXEC_FORWARD, - EXEC_REVERSE, - EXEC_ERROR - }; - -extern enum exec_direction_kind 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); - /* 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 -#if !defined(START_INFERIOR_TRAPS_EXPECTED) -#define START_INFERIOR_TRAPS_EXPECTED 2 -#endif +/* 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 all supported + implementations. */ +#define START_INFERIOR_TRAPS_EXPECTED 1 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; +}; + /* 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 @@ -422,6 +301,15 @@ struct inferior /* 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; + + /* The highest thread number this inferior ever had. */ + int highest_thread_num; + + /* State of GDB control of inferior process execution. + See `struct inferior_control_state'. */ + struct inferior_control_state control; /* True if this was an auto-created inferior, e.g. created from following a fork; false, if this inferior was manually added by @@ -454,9 +342,6 @@ struct inferior in format described in environ.h. */ struct gdb_environ *environment; - /* See the definition of stop_kind above. */ - enum stop_kind stop_soon; - /* Nonzero if this child process was attached rather than forked. */ int attach_flag; @@ -488,39 +373,50 @@ struct inferior specific thread, see `struct thread_info'. */ struct continuation *continuations; - /* 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. */ + /* True if setup_inferior wasn't called for this inferior yet. + Until that is done, we must not access inferior memory or + registers, as we haven't determined the target + architecture/description. */ + int needs_setup; - /* 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; + /* Private data used by the target vector implementation. */ + struct private_inferior *priv; + + /* 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. */ - 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); @@ -535,14 +431,7 @@ extern struct inferior *add_inferior (int pid); 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); +extern void delete_inferior (struct inferior *todel); /* Delete an existing inferior list entry, due to inferior detaching. */ extern void detach_inferior (int pid); @@ -576,10 +465,14 @@ 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 whose pid is equal to 'ptid.pid'. */ +extern struct inferior *find_inferior_ptid (ptid_t ptid); + /* 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); @@ -597,15 +490,12 @@ 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 the number of live inferiors (real live processes). */ +extern int number_of_live_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); @@ -618,6 +508,11 @@ 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 @@ -628,6 +523,4 @@ extern int number_of_inferiors (void); extern struct inferior *add_inferior_with_spaces (void); -extern void update_observer_mode (void); - #endif /* !defined (INFERIOR_H) */