X-Git-Url: http://git.efficios.com/?a=blobdiff_plain;f=gdb%2Finferior.h;h=f8d358d4af336db83e1be0557d4eb8c50b296b43;hb=322f9c2100806387b8ace4df7a2b940b03b3d703;hp=7cebcbf6bfa10337a47d7b4a06a6b53094914cf7;hpb=1777feb0fea5ec350a86eecf81f71ccc60d4cf6f;p=deliverable%2Fbinutils-gdb.git diff --git a/gdb/inferior.h b/gdb/inferior.h index 7cebcbf6bf..f8d358d4af 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, - 2011 Free Software Foundation, Inc. + Copyright (C) 1986-2014 Free Software Foundation, Inc. This file is part of GDB. @@ -31,17 +29,21 @@ 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" #include "progspace.h" +#include "registry.h" struct infcall_suspend_state; struct infcall_control_state; @@ -63,46 +65,6 @@ extern void discard_infcall_control_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. */ @@ -118,7 +80,7 @@ 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; @@ -131,7 +93,7 @@ extern int sync_execution; 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; @@ -142,22 +104,17 @@ 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; -/* 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; +/* 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 unsigned_pointer_to_address (struct gdbarch *gdbarch, struct type *type, const gdb_byte *buf); @@ -171,7 +128,7 @@ 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); @@ -179,14 +136,18 @@ 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 */ @@ -195,23 +156,29 @@ 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_save_ours (struct target_ops *self); + +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); @@ -220,7 +187,7 @@ extern char *construct_inferior_arguments (int, char **); /* From infrun.c */ -extern int debug_infrun; +extern unsigned int debug_infrun; extern int stop_on_solib_events; @@ -228,6 +195,8 @@ extern void start_remote (int from_tty); extern void normal_stop (void); +extern void print_stop_event (struct target_waitstatus *ws); + extern int signal_stop_state (int); extern int signal_print_state (int); @@ -245,13 +214,19 @@ 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. */ -void set_step_info (struct frame_info *frame, struct symtab_and_line sal); +extern void clear_exit_convenience_vars (void); + +/* Returns true if we're trying to step past the instruction at + ADDRESS in ASPACE. */ + +extern int stepping_past_instruction_at (struct address_space *aspace, + CORE_ADDR address); /* From infcmd.c */ @@ -267,16 +242,8 @@ extern void set_inferior_args_vector (int, char **); 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); @@ -285,6 +252,28 @@ extern void detach_command (char *, int); extern void notice_new_inferior (ptid_t, int, int); +extern struct value *get_return_value (struct value *function, + struct type *value_type); + +/* 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; @@ -316,20 +305,20 @@ 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 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. */ @@ -346,11 +335,13 @@ 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; /* 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. @@ -366,31 +357,18 @@ extern int debug_displaced; 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); /* 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; @@ -409,9 +387,11 @@ struct inferior_control_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 @@ -434,6 +414,8 @@ 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; /* State of GDB control of inferior process execution. See `struct inferior_control_state'. */ @@ -441,7 +423,9 @@ struct inferior /* 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 @@ -508,36 +492,41 @@ struct inferior /* 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; + /* 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); @@ -614,12 +603,6 @@ 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); @@ -635,6 +618,11 @@ 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 @@ -647,4 +635,18 @@ 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) */