-/* Copyright (C) 1986-2014 Free Software Foundation, Inc.
+/* Copyright (C) 1986-2020 Free Software Foundation, Inc.
This file is part of GDB.
#ifndef INFRUN_H
#define INFRUN_H 1
-#include "ptid.h"
#include "symtab.h"
+#include "gdbsupport/byte-vector.h"
struct target_waitstatus;
struct frame_info;
struct address_space;
+struct return_value_info;
+struct process_stratum_target;
/* True if we are debugging run control. */
extern unsigned int debug_infrun;
/* True if we are debugging displaced stepping. */
-extern int debug_displaced;
+extern bool debug_displaced;
/* Nonzero if we want to give control to the user when we're notified
of shared library events by the dynamic linker. */
extern int stop_on_solib_events;
-/* 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;
-
/* True if execution commands resume all threads of all processes by
default; otherwise, resume only threads of the current inferior
process. */
-extern int sched_multi;
+extern bool 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;
+extern bool 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;
+extern bool 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 bool disable_randomization;
+
+/* Returns a unique identifier for the current stop. This can be used
+ to tell whether a command has proceeded the inferior past the
+ current location. */
+extern ULONGEST get_stop_id (void);
/* Reverse execution. */
enum exec_direction_kind
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;
+/* The current execution direction. */
+extern enum exec_direction_kind execution_direction;
extern void start_remote (int from_tty);
-extern void clear_proceed_status (void);
-
-extern void proceed (CORE_ADDR, enum gdb_signal, int);
-
-/* The `resume' routine should only be called in special circumstances.
- Normally, use `proceed', which handles a lot of bookkeeping. */
-extern void resume (int, enum gdb_signal);
-
+/* Clear out all variables saying what to do when inferior is
+ continued or stepped. First do this, then set the ones you want,
+ then call `proceed'. STEP indicates whether we're preparing for a
+ step/stepi command. */
+extern void clear_proceed_status (int step);
+
+extern void proceed (CORE_ADDR, enum gdb_signal);
+
+/* Return a ptid representing the set of threads that we will proceed,
+ in the perspective of the user/frontend. We may actually resume
+ fewer threads at first, e.g., if a thread is stopped at a
+ breakpoint that needs stepping-off, but that should not be visible
+ to the user/frontend, and neither should the frontend/user be
+ allowed to proceed any of the threads that happen to be stopped for
+ internal run control handling, if a previous command wanted them
+ resumed. */
extern ptid_t user_visible_resume_ptid (int step);
-extern void wait_for_inferior (void);
+/* Return the process_stratum target that we will proceed, in the
+ perspective of the user/frontend. If RESUME_PTID is
+ MINUS_ONE_PTID, then we'll resume all threads of all targets, so
+ the function returns NULL. Otherwise, we'll be resuming a process
+ or thread of the current process, so we return the current
+ inferior's process stratum target. */
+extern process_stratum_target *user_visible_resume_target (ptid_t resume_ptid);
+
+/* Return control to GDB when the inferior stops for real. Print
+ appropriate messages, remove breakpoints, give terminal our modes,
+ and run the stop hook. Returns true if the stop hook proceeded the
+ target, false otherwise. */
+extern int normal_stop (void);
+
+/* Return the cached copy of the last target/ptid/waitstatus returned
+ by target_wait()/deprecated_target_wait_hook(). The data is
+ actually cached by handle_inferior_event(), which gets called
+ immediately after target_wait()/deprecated_target_wait_hook(). */
+extern void get_last_target_status (process_stratum_target **target,
+ ptid_t *ptid,
+ struct target_waitstatus *status);
-extern void normal_stop (void);
+/* Set the cached copy of the last target/ptid/waitstatus. */
+extern void set_last_target_status (process_stratum_target *target, ptid_t ptid,
+ struct target_waitstatus status);
-extern void get_last_target_status (ptid_t *ptid,
- struct target_waitstatus *status);
+/* Clear the cached copy of the last ptid/waitstatus returned by
+ target_wait(). */
+extern void nullify_last_target_wait_ptid ();
+
+/* Stop all threads. Only returns after everything is halted. */
+extern void stop_all_threads (void);
extern void prepare_for_detach (void);
struct symtab_and_line ,
struct frame_id);
-extern void follow_inferior_reset_breakpoints (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);
+/* Returns true if thread whose thread number is THREAD is stepping
+ over a breakpoint. */
+extern int thread_is_stepping_over_breakpoint (int thread);
+
+/* Returns true if we're trying to step past an instruction that
+ triggers a non-steppable watchpoint. */
+extern int stepping_past_nonsteppable_watchpoint (void);
+
extern void set_step_info (struct frame_info *frame,
struct symtab_and_line sal);
inferior has stopped. */
extern void print_no_history_reason (struct ui_out *uiout);
-extern void print_stop_event (struct target_waitstatus *ws);
+/* Print the result of a function at the end of a 'finish' command.
+ RV points at an object representing the captured return value/type
+ and its position in the value history. */
+
+extern void print_return_value (struct ui_out *uiout,
+ struct return_value_info *rv);
+
+/* Print current location without a level number, if we have changed
+ functions or hit a breakpoint. Print source line if we have one.
+ If the execution command captured a return value, print it. If
+ DISPLAYS is false, do not call 'do_displays'. */
+
+extern void print_stop_event (struct ui_out *uiout, bool displays = true);
+
+/* Pretty print the results of target_wait, for debugging purposes. */
+
+extern void print_target_wait_results (ptid_t waiton_ptid, ptid_t result_ptid,
+ const struct target_waitstatus *ws);
extern int signal_stop_state (int);
systems. Use of symbolic signal names is strongly encouraged. */
enum gdb_signal gdb_signal_from_command (int num);
+/* Enables/disables infrun's async event source in the event loop. */
+extern void infrun_async (int enable);
+
+/* Call infrun's event handler the next time through the event
+ loop. */
+extern void mark_infrun_async_event_handler (void);
+
+/* The global queue of threads that need to do a step-over operation
+ to get past e.g., a breakpoint. */
+extern struct thread_info *step_over_queue_head;
+
+/* Remove breakpoints if possible (usually that means, if everything
+ is stopped). On failure, print a message. */
+extern void maybe_remove_breakpoints (void);
+
+/* If a UI was in sync execution mode, and now isn't, restore its
+ prompt (a synchronous execution command has finished, and we're
+ ready for input). */
+extern void all_uis_check_sync_execution_done (void);
+
+/* If a UI was in sync execution mode, and hasn't displayed the prompt
+ yet, re-disable its prompt (a synchronous execution command was
+ started or re-started). */
+extern void all_uis_on_sync_execution_starting (void);
+
+/* Base class for displaced stepping closures (the arch-specific data). */
+
+struct displaced_step_closure
+{
+ virtual ~displaced_step_closure () = 0;
+};
+
+/* A simple displaced step closure that contains only a byte buffer. */
+
+struct buf_displaced_step_closure : displaced_step_closure
+{
+ buf_displaced_step_closure (int buf_size)
+ : buf (buf_size)
+ {}
+
+ gdb::byte_vector buf;
+};
+
+/* Per-inferior displaced stepping state. */
+struct displaced_step_inferior_state
+{
+ displaced_step_inferior_state ()
+ {
+ reset ();
+ }
+
+ /* Put this object back in its original state. */
+ void reset ()
+ {
+ failed_before = 0;
+ step_thread = nullptr;
+ step_gdbarch = nullptr;
+ step_closure = nullptr;
+ step_original = 0;
+ step_copy = 0;
+ step_saved_copy.clear ();
+ }
+
+ /* True if preparing a displaced step ever failed. If so, we won't
+ try displaced stepping for this inferior again. */
+ int failed_before;
+
+ /* If this is not nullptr, this is the thread carrying out a
+ displaced single-step in process PID. This thread's state will
+ require fixing up once it has completed its step. */
+ thread_info *step_thread;
+
+ /* The architecture the thread had when we stepped it. */
+ gdbarch *step_gdbarch;
+
+ /* The closure provided gdbarch_displaced_step_copy_insn, to be used
+ for post-step cleanup. */
+ displaced_step_closure *step_closure;
+
+ /* The address of the original instruction, and the copy we
+ made. */
+ CORE_ADDR step_original, step_copy;
+
+ /* Saved contents of copy area. */
+ gdb::byte_vector step_saved_copy;
+};
+
#endif /* INFRUN_H */
projects / deliverable / binutils-gdb.git / blobdiff