-/* Copyright (C) 1986-2016 Free Software Foundation, Inc.
+/* Copyright (C) 1986-2021 Free Software Foundation, Inc.
This file is part of GDB.
#define INFRUN_H 1
#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;
+struct thread_info;
/* True if we are debugging run control. */
-extern unsigned int debug_infrun;
+extern bool debug_infrun;
-/* True if we are debugging displaced stepping. */
-extern int debug_displaced;
+/* Print an "infrun" debug statement. */
+
+#define infrun_debug_printf(fmt, ...) \
+ debug_prefixed_printf_cond (debug_infrun, "infrun", fmt, ##__VA_ARGS__)
+
+/* Print "infrun" start/end debug statements. */
+
+#define INFRUN_SCOPED_DEBUG_START_END(msg) \
+ scoped_debug_start_end (debug_infrun, "infrun", msg)
+
+/* Print "infrun" enter/exit debug statements. */
+
+#define INFRUN_SCOPED_DEBUG_ENTER_EXIT \
+ scoped_debug_enter_exit (debug_infrun, "infrun")
/* Nonzero if we want to give control to the user when we're notified
of shared library events by the dynamic linker. */
/* 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
extern void proceed (CORE_ADDR, enum gdb_signal);
-/* The `resume' routine should only be called in special circumstances.
- Normally, use `proceed', which handles a lot of bookkeeping. */
-extern void resume (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
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,
target, false otherwise. */
extern int normal_stop (void);
-extern void get_last_target_status (ptid_t *ptid,
+/* 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 set_last_target_status (ptid_t ptid,
+/* 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);
+/* 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);
-extern void fetch_inferior_event (void *);
+extern void fetch_inferior_event ();
extern void init_wait_for_inferior (void);
triggers a non-steppable watchpoint. */
extern int stepping_past_nonsteppable_watchpoint (void);
-extern void set_step_info (struct frame_info *frame,
+/* Record in TP the frame and location we're currently stepping through. */
+extern void set_step_info (thread_info *tp,
+ struct frame_info *frame,
struct symtab_and_line sal);
/* Several print_*_reason helper functions to print why the inferior
/* 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 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);
+extern void print_stop_event (struct ui_out *uiout, bool displays = true);
/* Pretty print the results of target_wait, for debugging purposes. */
$_exitsignal. */
extern void clear_exit_convenience_vars (void);
-/* Dump LEN bytes at BUF in hex to FILE, followed by a newline. */
-extern void displaced_step_dump_bytes (struct ui_file *file,
- const gdb_byte *buf, size_t len);
-
-extern struct displaced_step_closure *get_displaced_step_closure_by_addr
- (CORE_ADDR addr);
+/* Dump LEN bytes at BUF in hex to a string and return it. */
+extern std::string displaced_step_dump_bytes (const gdb_byte *buf, size_t len);
extern void update_observer_mode (void);
loop. */
extern void mark_infrun_async_event_handler (void);
-/* The global queue of threads that need to do a step-over operation
+/* The global chain 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;
+extern struct thread_info *global_thread_step_over_chain_head;
/* Remove breakpoints if possible (usually that means, if everything
is stopped). On failure, print a message. */
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);
+
+/* In all-stop, restart the target if it had to be stopped to
+ detach. */
+extern void restart_after_all_stop_detach (process_stratum_target *proc_target);
+
+/* RAII object to temporarily disable the requirement for target
+ stacks to commit their resumed threads.
+
+ On construction, set process_stratum_target::commit_resumed_state
+ to false for all process_stratum targets in all target
+ stacks.
+
+ On destruction (or if reset_and_commit() is called), set
+ process_stratum_target::commit_resumed_state to true for all
+ process_stratum targets in all target stacks, except those that:
+
+ - have no resumed threads
+ - have a resumed thread with a pending status
+
+ target_commit_resumed is not called in the destructor, because its
+ implementations could throw, and we don't to swallow that error in
+ a destructor. Instead, the caller should call the
+ reset_and_commit_resumed() method so that an eventual exception can
+ propagate. "reset" in the method name refers to the fact that this
+ method has the same effect as the destructor, in addition to
+ committing resumes.
+
+ The creation of nested scoped_disable_commit_resumed objects is
+ tracked, such that only the outermost instance actually does
+ something, for cases like this:
+
+ void
+ inner_func ()
+ {
+ scoped_disable_commit_resumed disable;
+
+ // do stuff
+
+ disable.reset_and_commit ();
+ }
+
+ void
+ outer_func ()
+ {
+ scoped_disable_commit_resumed disable;
+
+ for (... each thread ...)
+ inner_func ();
+
+ disable.reset_and_commit ();
+ }
+
+ In this case, we don't want the `disable` destructor in
+ `inner_func` to require targets to commit resumed threads, so that
+ the `reset_and_commit()` call in `inner_func` doesn't actually
+ resume threads. */
+
+struct scoped_disable_commit_resumed
+{
+ explicit scoped_disable_commit_resumed (const char *reason);
+ ~scoped_disable_commit_resumed ();
+
+ DISABLE_COPY_AND_ASSIGN (scoped_disable_commit_resumed);
+
+ /* Undoes the disabling done by the ctor, and calls
+ maybe_call_commit_resumed_all_targets(). */
+ void reset_and_commit ();
+
+private:
+ /* Undoes the disabling done by the ctor. */
+ void reset ();
+
+ /* Whether this object has been reset. */
+ bool m_reset = false;
+
+ const char *m_reason;
+ bool m_prev_enable_commit_resumed;
+};
+
+/* Call target_commit_resumed method on all target stacks whose
+ process_stratum target layer has COMMIT_RESUME_STATE set. */
+
+extern void maybe_call_commit_resumed_all_targets ();
+
+/* RAII object to temporarily enable the requirement for target stacks
+ to commit their resumed threads. This is the inverse of
+ scoped_disable_commit_resumed. The constructor calls the
+ maybe_call_commit_resumed_all_targets function itself, since it's
+ OK to throw from a constructor. */
+
+struct scoped_enable_commit_resumed
+{
+ explicit scoped_enable_commit_resumed (const char *reason);
+ ~scoped_enable_commit_resumed ();
+
+ DISABLE_COPY_AND_ASSIGN (scoped_enable_commit_resumed);
+
+private:
+ const char *m_reason;
+ bool m_prev_enable_commit_resumed;
+};
+
+
#endif /* INFRUN_H */