X-Git-Url: http://git.efficios.com/?a=blobdiff_plain;f=gdb%2Finferior.h;h=fff072bbb7068dc13ef9bc1a0c411943afd209ad;hb=0c5571793a8e3dbd0f99b8e4759bd201f5fe75b7;hp=cc5bf9f5bddbb3113873bb511253632944f0b0ce;hpb=2fdf0e429d785ec1096543ca06b9945ade3f7090;p=deliverable%2Fbinutils-gdb.git diff --git a/gdb/inferior.h b/gdb/inferior.h index cc5bf9f5bd..fff072bbb7 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 - Free Software Foundation, Inc. + Copyright (C) 1986-2013 Free Software Foundation, Inc. This file is part of GDB. @@ -30,63 +28,52 @@ struct type; 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 *); +#include "progspace.h" +#include "registry.h" -extern void discard_inferior_status (struct inferior_status *); +struct infcall_suspend_state; +struct infcall_control_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; +extern struct infcall_suspend_state *save_infcall_suspend_state (void); +extern struct infcall_control_state *save_infcall_control_state (void); -/* The null or zero ptid, often used to indicate no process. */ -extern ptid_t null_ptid; +extern void restore_infcall_suspend_state (struct infcall_suspend_state *); +extern void restore_infcall_control_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 cleanup *make_cleanup_restore_infcall_suspend_state + (struct infcall_suspend_state *); +extern struct cleanup *make_cleanup_restore_infcall_control_state + (struct infcall_control_state *); -/* Find/Create a ptid from just a pid. */ -ptid_t pid_to_ptid (int pid); +extern void discard_infcall_suspend_state (struct infcall_suspend_state *); +extern void discard_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 regcache * + get_infcall_suspend_state_regcache (struct infcall_suspend_state *); -/* Fetch the lwp (lightweight process) component from a ptid. */ -long ptid_get_lwp (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. */ -/* 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 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 @@ -97,32 +84,28 @@ extern void set_sigint_trap (void); 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. */ + 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 void proceed (CORE_ADDR, enum gdb_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 @@ -131,44 +114,54 @@ 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 + 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; +/* When set (default), the target should attempt to disable the operating + system's address space randomization feature when starting an inferior. */ +extern int disable_randomization; + 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 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 void resume (int, enum gdb_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 */ @@ -177,7 +170,7 @@ 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 (const char *, int); extern void term_info (char *, int); @@ -189,30 +182,24 @@ extern void terminal_init_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 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 char *construct_inferior_arguments (int, char **); -extern void new_tty_prefork (const char *); +/* From infrun.c */ -extern int gdb_has_a_terminal (void); +extern unsigned int debug_infrun; -/* From infrun.c */ +extern int stop_on_solib_events; extern void start_remote (int from_tty); @@ -235,15 +222,15 @@ extern void get_last_target_status(ptid_t *ptid, extern void follow_inferior_reset_breakpoints (void); -/* Throw an error indicating the current thread is running. */ -extern void error_is_running (void); +void set_step_info (struct frame_info *frame, struct symtab_and_line sal); -/* Calls error_is_running if the current thread is running. */ -extern void ensure_not_running (void); +/* Clear the convenience variables associated with the exit of the + inferior. Currently, those variables are $_exitcode and + $_exitsignal. */ -/* From infcmd.c */ +extern void clear_exit_convenience_vars (void); -extern void tty_command (char *, int); +/* From infcmd.c */ extern void post_create_inferior (struct target_ops *, int); @@ -251,44 +238,41 @@ extern void attach_command (char *, 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 registers_info (char *, int); -extern void nexti_command (char *, int); +extern void continue_1 (int all_threads); -extern void stepi_command (char *, int); +extern void interrupt_target_1 (int all_threads); -extern void continue_1 (int all_threads); +extern void delete_longjmp_breakpoint_cleanup (void *arg); -extern void continue_command (char *, int); +extern void detach_command (char *, int); -extern void interrupt_target_command (char *args, int from_tty); +extern void notice_new_inferior (ptid_t, int, int); -extern void interrupt_target_1 (int all_threads); +extern struct value *get_return_value (struct value *function, + struct type *value_type); /* 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 { @@ -304,10 +288,10 @@ 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. @@ -315,7 +299,7 @@ enum step_over_calls_kind 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 @@ -334,19 +318,16 @@ enum stop_kind enum exec_direction_kind { EXEC_FORWARD, - EXEC_REVERSE, - EXEC_ERROR + EXEC_REVERSE }; -extern enum exec_direction_kind execution_direction; +/* 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; -/* 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. +/* 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). */ @@ -359,22 +340,15 @@ extern int debug_displaced; 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; - +struct displaced_step_closure *get_displaced_step_closure_by_addr (CORE_ADDR addr); /* 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., + 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 @@ -387,7 +361,7 @@ extern int suppress_resume_observer; 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 @@ -395,6 +369,26 @@ extern int suppress_resume_observer; 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 @@ -416,18 +410,120 @@ 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; - /* 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'. */ + struct continuation *continuations; + /* 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); @@ -444,6 +540,8 @@ 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); @@ -451,6 +549,14 @@ 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); @@ -467,11 +573,18 @@ 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_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 @@ -486,17 +599,50 @@ 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); + +/* 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); + +extern void update_observer_mode (void); + +extern void update_signals_program_target (void); + +extern void signal_catch_update (const unsigned int *); + +/* In some circumstances we allow a command to specify a numeric + signal. The idea is to keep these circumstances limited so that + users (and scripts) develop portable habits. For comparison, + POSIX.2 `kill' requires that 1,2,3,6,9,14, and 15 work (and using a + numeric signal at all is obsolescent. We are slightly more lenient + and allow 1-15 which should match host signal numbers on most + systems. Use of symbolic signal names is strongly encouraged. */ + +enum gdb_signal gdb_signal_from_command (int num); + #endif /* !defined (INFERIOR_H) */