/* Variables that describe the inferior process running under GDB:
Where it is, why it stopped, and how to step it.
- Copyright (C) 1986-2019 Free Software Foundation, Inc.
+ Copyright (C) 1986-2022 Free Software Foundation, Inc.
This file is part of GDB.
#if !defined (INFERIOR_H)
#define INFERIOR_H 1
+#include <exception>
+#include <list>
+
struct target_waitstatus;
struct frame_info;
struct ui_file;
struct ui_out;
struct terminal_info;
struct target_desc_info;
-struct continuation;
struct inferior;
struct thread_info;
#include "frame.h"
/* For gdb_environ. */
-#include "environ.h"
+#include "gdbsupport/environ.h"
#include "progspace.h"
#include "registry.h"
#include "symfile-add-flags.h"
-#include "common/refcounted-object.h"
+#include "gdbsupport/refcounted-object.h"
+#include "gdbsupport/forward-scope-exit.h"
+#include "gdbsupport/gdb_unique_ptr.h"
+#include "gdbsupport/intrusive_list.h"
-#include "common-inferior.h"
+#include "gdbsupport/common-inferior.h"
#include "gdbthread.h"
+#include "process-stratum-target.h"
+#include "displaced-stepping.h"
+
+#include <unordered_map>
+
struct infcall_suspend_state;
struct infcall_control_state;
{
void operator() (struct infcall_suspend_state *state) const
{
- restore_infcall_suspend_state (state);
+ try
+ {
+ restore_infcall_suspend_state (state);
+ }
+ catch (const gdb_exception_error &e)
+ {
+ /* If we are restoring the inferior state due to an exception,
+ some error message will be printed. So, only warn the user
+ when we cannot restore during normal execution. */
+ bool unwinding;
+#if __cpp_lib_uncaught_exceptions
+ unwinding = std::uncaught_exceptions () > 0;
+#else
+ unwinding = std::uncaught_exception ();
+#endif
+ if (!unwinding)
+ warning (_("Failed to restore inferior state: %s"), e.what ());
+ }
}
};
extern void clear_sigint_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, inferior_ptid.pid () will be 0. */
extern void child_terminal_info (struct target_ops *self, const char *, int);
-extern void info_terminal_command (char *, int);
-
extern void child_terminal_ours (struct target_ops *self);
extern void child_terminal_ours_for_output (struct target_ops *self);
STARTUP_INFERIOR. */
extern ptid_t gdb_startup_inferior (pid_t pid, int num_traps);
-extern char *construct_inferior_arguments (int, char **);
-
/* From infcmd.c */
/* Initial inferior setup. Determines the exec file is not yet known,
extern void setup_inferior (int from_tty);
-extern void post_create_inferior (struct target_ops *, int);
+extern void post_create_inferior (int from_tty);
extern void attach_command (const char *, int);
-extern const char *get_inferior_args (void);
-
-extern void set_inferior_args (const char *);
-
extern void set_inferior_args_vector (int, char **);
extern void registers_info (const char *, int);
extern void continue_1 (int all_threads);
-extern void interrupt_target_1 (int all_threads);
+extern void interrupt_target_1 (bool all_threads);
-extern void delete_longjmp_breakpoint_cleanup (void *arg);
+using delete_longjmp_breakpoint_cleanup
+ = FORWARD_SCOPE_EXIT (delete_longjmp_breakpoint);
extern void detach_command (const char *, int);
-extern void notice_new_inferior (struct thread_info *, int, int);
+extern void notice_new_inferior (struct thread_info *, bool, int);
+
+/* Return the value of the result of a function at the end of a 'finish'
+ command/BP. If the result's value cannot be retrieved, return NULL.
-extern struct value *get_return_value (struct value *function,
- struct type *value_type);
+ FUNC_SYMBOL is the symbol of the function being returned from. FUNCTION is
+ a value containing the address of the function. */
+
+extern struct value *get_return_value (struct symbol *func_symbol,
+ struct value *function);
/* Prepare for execution command. TARGET is the target that will run
the command. BACKGROUND determines whether this is a foreground
extern void prepare_execution_command (struct target_ops *target,
int background);
-/* 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;
-
/* Nonzero if stopped due to completion of a stack dummy routine. */
extern enum stop_stack_kind stop_stack_dummy;
/* Print notices on inferior events (attach, detach, etc.), set with
`set print inferior-events'. */
-extern int print_inferior_events;
+extern bool print_inferior_events;
/* Anything but NO_STOP_QUIETLY means we expect a trap and the caller
will handle it themselves. STOP_QUIETLY is used when running in
extern void set_current_inferior (inferior *);
+/* Switch inferior (and program space) to INF, and switch to no thread
+ selected. */
+extern void switch_to_inferior_no_thread (inferior *inf);
+
/* 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
the inferior object's refcount, to prevent something deleting the
inferior object before reverting back (e.g., due to a
"remove-inferiors" command (see
- make_cleanup_restore_current_thread). All other inferior
+ scoped_restore_current_inferior). All other inferior
references are considered weak references. Inferiors are always
listed exactly once in the inferior list, so placing an inferior in
the inferior list is an implicit, not counted strong reference. */
-class inferior : public refcounted_object
+class inferior : public refcounted_object,
+ public intrusive_list_node<inferior>
{
public:
explicit inferior (int pid);
/* Returns true if we can delete this inferior. */
bool deletable () const { return refcount () == 0; }
- /* Pointer to next inferior in singly-linked list of inferiors. */
- struct inferior *next = NULL;
+ /* Push T in this inferior's target stack. */
+ void push_target (struct target_ops *t)
+ { m_target_stack.push (t); }
- /* This inferior's thread list. */
- thread_info *thread_list = nullptr;
+ /* An overload that deletes the target on failure. */
+ void push_target (target_ops_up &&t)
+ {
+ m_target_stack.push (t.get ());
+ t.release ();
+ }
+
+ /* Unpush T from this inferior's target stack. */
+ int unpush_target (struct target_ops *t);
+
+ /* Returns true if T is pushed in this inferior's target stack. */
+ bool target_is_pushed (target_ops *t)
+ { return m_target_stack.is_pushed (t); }
+
+ /* Find the target beneath T in this inferior's target stack. */
+ target_ops *find_target_beneath (const target_ops *t)
+ { return m_target_stack.find_beneath (t); }
+
+ /* Return the target at the top of this inferior's target stack. */
+ target_ops *top_target ()
+ { return m_target_stack.top (); }
+
+ /* Return the target at process_stratum level in this inferior's
+ target stack. */
+ struct process_stratum_target *process_target ()
+ { return (process_stratum_target *) m_target_stack.at (process_stratum); }
+
+ /* Return the target at STRATUM in this inferior's target stack. */
+ target_ops *target_at (enum strata stratum)
+ { return m_target_stack.at (stratum); }
+
+ bool has_execution ()
+ { return target_has_execution (this); }
+
+ /* This inferior's thread list, sorted by creation order. */
+ intrusive_list<thread_info> thread_list;
+
+ /* A map of ptid_t to thread_info*, for average O(1) ptid_t lookup.
+ Exited threads do not appear in the map. */
+ std::unordered_map<ptid_t, thread_info *, hash_ptid> ptid_thread_map;
/* Returns a range adapter covering the inferior's threads,
including exited threads. Used like this:
{ .... }
*/
inf_threads_range threads ()
- { return inf_threads_range (this->thread_list); }
+ { return inf_threads_range (this->thread_list.begin ()); }
/* Returns a range adapter covering the inferior's non-exited
threads. Used like this:
{ .... }
*/
inf_non_exited_threads_range non_exited_threads ()
- { return inf_non_exited_threads_range (this->thread_list); }
+ { return inf_non_exited_threads_range (this->thread_list.begin ()); }
/* Like inferior::threads(), but returns a range adapter that can be
used with range-for, safely. I.e., it is safe to delete the
delete f;
*/
inline safe_inf_threads_range threads_safe ()
- { return safe_inf_threads_range (this->thread_list); }
+ { return safe_inf_threads_range (this->thread_list.begin ()); }
+
+ /* Delete all threads in the thread list. If SILENT, exit threads
+ silently. */
+ void clear_thread_list (bool silent);
+
+ /* Continuations-related methods. A continuation is an std::function
+ to be called to finish the execution of a command when running
+ GDB asynchronously. A continuation is executed after any thread
+ of this inferior stops. Continuations are used by the attach
+ command and the remote target when a new inferior is detected. */
+ void add_continuation (std::function<void ()> &&cont);
+ void do_all_continuations ();
+
+ /* Set/get file name for default use for standard in/out in the inferior.
+
+ On Unix systems, we try to make TERMINAL_NAME the inferior's controlling
+ terminal.
+
+ If TERMINAL_NAME is the empty string, then the inferior inherits GDB's
+ terminal (or GDBserver's if spawning a remote process). */
+ void set_tty (std::string terminal_name);
+ const std::string &tty ();
+
+ /* Set the argument string to use when running this inferior.
+
+ An empty string can be used to represent "no arguments". */
+ void set_args (std::string args)
+ {
+ m_args = std::move (args);
+ };
+
+ /* Get the argument string to use when running this inferior.
+
+ No arguments is represented by an empty string. */
+ const std::string &args () const
+ {
+ return m_args;
+ }
+
+ /* Set the inferior current working directory.
+
+ If CWD is empty, unset the directory. */
+ void set_cwd (std::string cwd)
+ {
+ m_cwd = std::move (cwd);
+ }
+
+ /* Get the inferior current working directory.
+
+ Return an empty string if the current working directory is not
+ specified. */
+ const std::string &cwd () const
+ {
+ return m_cwd;
+ }
/* Convenient handle (GDB inferior id). Unique across all
inferiors. */
/* The program space bound to this inferior. */
struct program_space *pspace = NULL;
- /* The arguments string to use when running. */
- char *args = NULL;
-
- /* The size of elements in argv. */
- int argc = 0;
-
- /* 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 = NULL;
-
- /* The current working directory that will be used when starting
- this inferior. */
- gdb::unique_xmalloc_ptr<char> cwd;
-
- /* The name of terminal device to use for I/O. */
- char *terminal = NULL;
-
/* The terminal state as set by the last target_terminal::terminal_*
call. */
target_terminal_state terminal_state = target_terminal_state::is_ours;
exits or execs. */
bool pending_detach = false;
- /* 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. */
- bool waiting_for_vfork_done = false;
+ /* If non-nullptr, points to a thread that called vfork and is now waiting
+ for a vfork child not under our control to be done with the shared memory
+ region, either by exiting or execing. */
+ thread_info *thread_waiting_for_vfork_done = nullptr;
/* True if we're in the process of detaching from this inferior. */
bool detaching = false;
- /* 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'. */
- continuation *continuations = NULL;
-
/* 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. */
bool needs_setup = false;
+ /* True when we are reading the library list of the inferior during an
+ attach or handling a fork child. */
+ bool in_initial_library_scan = false;
+
/* Private data used by the target vector implementation. */
std::unique_ptr<private_inferior> priv;
/* Per inferior data-pointers required by other GDB modules. */
REGISTRY_FIELDS;
+
+private:
+ /* The inferior's target stack. */
+ target_stack m_target_stack;
+
+ /* The name of terminal device to use for I/O. */
+ std::string m_terminal;
+
+ /* The list of continuations. */
+ std::list<std::function<void ()>> m_continuations;
+
+ /* The arguments string to use when running. */
+ std::string m_args;
+
+ /* The current working directory that will be used when starting
+ this inferior. */
+ std::string m_cwd;
};
/* Keep a registry of per-inferior data-pointers required by other GDB
extern void inferior_appeared (struct inferior *inf, int pid);
-/* Get rid of all inferiors. */
-extern void discard_all_inferiors (void);
+/* Search function to lookup an inferior of TARG by target 'pid'. */
+extern struct inferior *find_inferior_pid (process_stratum_target *targ,
+ int pid);
-/* 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 of TARG whose pid is equal to
+ 'ptid.pid'. */
+extern struct inferior *find_inferior_ptid (process_stratum_target *targ,
+ ptid_t ptid);
/* Search function to lookup an inferior by GDB 'num'. */
extern struct inferior *find_inferior_id (int num);
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
- callback function returns false. If the callback function returns
- true, the iteration will end and the current inferior will be
- returned. This can be useful for implementing a search for a
- inferior with arbitrary attributes, or for applying some operation
- to every inferior.
-
- It is safe to delete the iterated inferior from the callback. */
-extern struct inferior *iterate_over_inferiors (int (*) (struct inferior *,
- void *),
- void *);
-
/* 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 the number of live inferiors running on PROC_TARGET (real
+ live processes with execution). */
+extern int number_of_live_inferiors (process_stratum_target *proc_target);
/* Returns true if there are any live inferiors in the inferior list
(not cores, not executables, real live processes). */
/* Traverse all inferiors. */
-extern struct inferior *inferior_list;
+extern intrusive_list<inferior> inferior_list;
/* Pull in the internals of the inferiors ranges and iterators. Must
be done after struct inferior is defined. */
inline all_inferiors_safe_range
all_inferiors_safe ()
{
- return {};
+ return all_inferiors_safe_range (nullptr, inferior_list);
}
/* Returns a range representing all inferiors, suitable to use with
*/
inline all_inferiors_range
-all_inferiors ()
+all_inferiors (process_stratum_target *proc_target = nullptr)
{
- return {};
+ return all_inferiors_range (proc_target, inferior_list);
}
/* Return a range that can be used to walk over all inferiors with PID
not zero, with range-for. */
inline all_non_exited_inferiors_range
-all_non_exited_inferiors ()
+all_non_exited_inferiors (process_stratum_target *proc_target = nullptr)
{
- return {};
+ return all_non_exited_inferiors_range (proc_target, inferior_list);
}
/* Prune away automatically added inferiors that aren't required
/* Print the current selected inferior. */
extern void print_selected_inferior (struct ui_out *uiout);
+/* Switch to inferior NEW_INF, a new inferior, and unless
+ NO_CONNECTION is true, push the process_stratum_target of ORG_INF
+ to NEW_INF. */
+
+extern void switch_to_inferior_and_push_target
+ (inferior *new_inf, bool no_connection, inferior *org_inf);
+
#endif /* !defined (INFERIOR_H) */
projects / binutils-gdb.git / blobdiff