e04ee09e24
This patch adds a target method named `to_thread_handle_to_thread_info'. It is intended to map a thread library specific thread handle (such as pthread_t for the pthread library) to the corresponding GDB internal thread_info struct (pointer). An implementation is provided for Linux pthreads; see linux-thread-db.c. gdb/ChangeLog: * target.h (struct target_ops): Add to_thread_handle_to_thread_info. (target_thread_handle_to_thread_info): Declare. * target.c (target_thread_handle_to_thread_info): New function. * target-delegates.c: Regenerate. * gdbthread.h (find_thread_by_handle): Declare. * thread.c (find_thread_by_handle): New function. * linux-thread-db.c (thread_db_thread_handle_to_thread_info): New function. (init_thread_db_ops): Register thread_db_thread_handle_to_thread_info.
685 lines
26 KiB
C++
685 lines
26 KiB
C++
/* Multi-process/thread control defs for GDB, the GNU debugger.
|
|
Copyright (C) 1987-2017 Free Software Foundation, Inc.
|
|
Contributed by Lynx Real-Time Systems, Inc. Los Gatos, CA.
|
|
|
|
|
|
This file is part of GDB.
|
|
|
|
This program is free software; you can redistribute it and/or modify
|
|
it under the terms of the GNU General Public License as published by
|
|
the Free Software Foundation; either version 3 of the License, or
|
|
(at your option) any later version.
|
|
|
|
This program is distributed in the hope that it will be useful,
|
|
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
GNU General Public License for more details.
|
|
|
|
You should have received a copy of the GNU General Public License
|
|
along with this program. If not, see <http://www.gnu.org/licenses/>. */
|
|
|
|
#ifndef GDBTHREAD_H
|
|
#define GDBTHREAD_H
|
|
|
|
struct symtab;
|
|
|
|
#include "breakpoint.h"
|
|
#include "frame.h"
|
|
#include "ui-out.h"
|
|
#include "inferior.h"
|
|
#include "btrace.h"
|
|
#include "common/vec.h"
|
|
#include "target/waitstatus.h"
|
|
#include "cli/cli-utils.h"
|
|
#include "common/refcounted-object.h"
|
|
#include "common-gdbthread.h"
|
|
|
|
/* Frontend view of the thread state. Possible extensions: stepping,
|
|
finishing, until(ling),... */
|
|
enum thread_state
|
|
{
|
|
THREAD_STOPPED,
|
|
THREAD_RUNNING,
|
|
THREAD_EXITED,
|
|
};
|
|
|
|
/* Inferior thread specific part of `struct infcall_control_state'.
|
|
|
|
Inferior process counterpart is `struct inferior_control_state'. */
|
|
|
|
struct thread_control_state
|
|
{
|
|
/* User/external stepping state. */
|
|
|
|
/* Step-resume or longjmp-resume breakpoint. */
|
|
struct breakpoint *step_resume_breakpoint;
|
|
|
|
/* Exception-resume breakpoint. */
|
|
struct breakpoint *exception_resume_breakpoint;
|
|
|
|
/* Breakpoints used for software single stepping. Plural, because
|
|
it may have multiple locations. E.g., if stepping over a
|
|
conditional branch instruction we can't decode the condition for,
|
|
we'll need to put a breakpoint at the branch destination, and
|
|
another at the instruction after the branch. */
|
|
struct breakpoint *single_step_breakpoints;
|
|
|
|
/* Range to single step within.
|
|
|
|
If this is nonzero, respond to a single-step signal by continuing
|
|
to step if the pc is in this range.
|
|
|
|
If step_range_start and step_range_end are both 1, it means to
|
|
step for a single instruction (FIXME: it might clean up
|
|
wait_for_inferior in a minor way if this were changed to the
|
|
address of the instruction and that address plus one. But maybe
|
|
not). */
|
|
CORE_ADDR step_range_start; /* Inclusive */
|
|
CORE_ADDR step_range_end; /* Exclusive */
|
|
|
|
/* Function the thread was in as of last it started stepping. */
|
|
struct symbol *step_start_function;
|
|
|
|
/* If GDB issues a target step request, and this is nonzero, the
|
|
target should single-step this thread once, and then continue
|
|
single-stepping it without GDB core involvement as long as the
|
|
thread stops in the step range above. If this is zero, the
|
|
target should ignore the step range, and only issue one single
|
|
step. */
|
|
int may_range_step;
|
|
|
|
/* Stack frame address as of when stepping command was issued.
|
|
This is how we know when we step into a subroutine call, and how
|
|
to set the frame for the breakpoint used to step out. */
|
|
struct frame_id step_frame_id;
|
|
|
|
/* Similarly, the frame ID of the underlying stack frame (skipping
|
|
any inlined frames). */
|
|
struct frame_id step_stack_frame_id;
|
|
|
|
/* Nonzero if we are presently stepping over a breakpoint.
|
|
|
|
If we hit a breakpoint or watchpoint, and then continue, we need
|
|
to single step the current thread with breakpoints disabled, to
|
|
avoid hitting the same breakpoint or watchpoint again. And we
|
|
should step just a single thread and keep other threads stopped,
|
|
so that other threads don't miss breakpoints while they are
|
|
removed.
|
|
|
|
So, this variable simultaneously means that we need to single
|
|
step the current thread, keep other threads stopped, and that
|
|
breakpoints should be removed while we step.
|
|
|
|
This variable is set either:
|
|
- in proceed, when we resume inferior on user's explicit request
|
|
- in keep_going, if handle_inferior_event decides we need to
|
|
step over breakpoint.
|
|
|
|
The variable is cleared in normal_stop. The proceed calls
|
|
wait_for_inferior, which calls handle_inferior_event in a loop,
|
|
and until wait_for_inferior exits, this variable is changed only
|
|
by keep_going. */
|
|
int trap_expected;
|
|
|
|
/* Nonzero if the thread is being proceeded for a "finish" command
|
|
or a similar situation when return value should be printed. */
|
|
int proceed_to_finish;
|
|
|
|
/* Nonzero if the thread is being proceeded for an inferior function
|
|
call. */
|
|
int in_infcall;
|
|
|
|
enum step_over_calls_kind step_over_calls;
|
|
|
|
/* Nonzero if stopped due to a step command. */
|
|
int stop_step;
|
|
|
|
/* Chain containing status of breakpoint(s) the thread stopped
|
|
at. */
|
|
bpstat stop_bpstat;
|
|
|
|
/* Whether the command that started the thread was a stepping
|
|
command. This is used to decide whether "set scheduler-locking
|
|
step" behaves like "on" or "off". */
|
|
int stepping_command;
|
|
};
|
|
|
|
/* Inferior thread specific part of `struct infcall_suspend_state'. */
|
|
|
|
struct thread_suspend_state
|
|
{
|
|
/* Last signal that the inferior received (why it stopped). When
|
|
the thread is resumed, this signal is delivered. Note: the
|
|
target should not check whether the signal is in pass state,
|
|
because the signal may have been explicitly passed with the
|
|
"signal" command, which overrides "handle nopass". If the signal
|
|
should be suppressed, the core will take care of clearing this
|
|
before the target is resumed. */
|
|
enum gdb_signal stop_signal;
|
|
|
|
/* The reason the thread last stopped, if we need to track it
|
|
(breakpoint, watchpoint, etc.) */
|
|
enum target_stop_reason stop_reason;
|
|
|
|
/* The waitstatus for this thread's last event. */
|
|
struct target_waitstatus waitstatus;
|
|
/* If true WAITSTATUS hasn't been handled yet. */
|
|
int waitstatus_pending_p;
|
|
|
|
/* Record the pc of the thread the last time it stopped. (This is
|
|
not the current thread's PC as that may have changed since the
|
|
last stop, e.g., "return" command, or "p $pc = 0xf000"). This is
|
|
used in coordination with stop_reason and waitstatus_pending_p:
|
|
if the thread's PC is changed since it last stopped, a pending
|
|
breakpoint waitstatus is discarded. */
|
|
CORE_ADDR stop_pc;
|
|
};
|
|
|
|
typedef struct value *value_ptr;
|
|
DEF_VEC_P (value_ptr);
|
|
typedef VEC (value_ptr) value_vec;
|
|
|
|
/* Threads are intrusively refcounted objects. Being the
|
|
user-selected thread is normally considered an implicit strong
|
|
reference and is thus not accounted in the refcount, unlike
|
|
inferior objects. This is necessary, because there's no "current
|
|
thread" pointer. Instead the current thread is inferred from the
|
|
inferior_ptid global. However, when GDB needs to remember the
|
|
selected thread to later restore it, GDB bumps the thread object's
|
|
refcount, to prevent something deleting the thread object before
|
|
reverting back (e.g., due to a "kill" command). If the thread
|
|
meanwhile exits before being re-selected, then the thread object is
|
|
left listed in the thread list, but marked with state
|
|
THREAD_EXITED. (See make_cleanup_restore_current_thread and
|
|
delete_thread). All other thread references are considered weak
|
|
references. Placing a thread in the thread list is an implicit
|
|
strong reference, and is thus not accounted for in the thread's
|
|
refcount. */
|
|
|
|
class thread_info : public refcounted_object
|
|
{
|
|
public:
|
|
explicit thread_info (inferior *inf, ptid_t ptid);
|
|
~thread_info ();
|
|
|
|
bool deletable () const
|
|
{
|
|
/* If this is the current thread, or there's code out there that
|
|
relies on it existing (refcount > 0) we can't delete yet. */
|
|
return (refcount () == 0 && !ptid_equal (ptid, inferior_ptid));
|
|
}
|
|
|
|
struct thread_info *next = NULL;
|
|
ptid_t ptid; /* "Actual process id";
|
|
In fact, this may be overloaded with
|
|
kernel thread id, etc. */
|
|
|
|
/* Each thread has two GDB IDs.
|
|
|
|
a) The thread ID (Id). This consists of the pair of:
|
|
|
|
- the number of the thread's inferior and,
|
|
|
|
- the thread's thread number in its inferior, aka, the
|
|
per-inferior thread number. This number is unique in the
|
|
inferior but not unique between inferiors.
|
|
|
|
b) The global ID (GId). This is a a single integer unique
|
|
between all inferiors.
|
|
|
|
E.g.:
|
|
|
|
(gdb) info threads -gid
|
|
Id GId Target Id Frame
|
|
* 1.1 1 Thread A 0x16a09237 in foo () at foo.c:10
|
|
1.2 3 Thread B 0x15ebc6ed in bar () at foo.c:20
|
|
1.3 5 Thread C 0x15ebc6ed in bar () at foo.c:20
|
|
2.1 2 Thread A 0x16a09237 in foo () at foo.c:10
|
|
2.2 4 Thread B 0x15ebc6ed in bar () at foo.c:20
|
|
2.3 6 Thread C 0x15ebc6ed in bar () at foo.c:20
|
|
|
|
Above, both inferiors 1 and 2 have threads numbered 1-3, but each
|
|
thread has its own unique global ID. */
|
|
|
|
/* The thread's global GDB thread number. This is exposed to MI,
|
|
Python/Scheme, visible with "info threads -gid", and is also what
|
|
the $_gthread convenience variable is bound to. */
|
|
int global_num;
|
|
|
|
/* The per-inferior thread number. This is unique in the inferior
|
|
the thread belongs to, but not unique between inferiors. This is
|
|
what the $_thread convenience variable is bound to. */
|
|
int per_inf_num;
|
|
|
|
/* The inferior this thread belongs to. */
|
|
struct inferior *inf;
|
|
|
|
/* The name of the thread, as specified by the user. This is NULL
|
|
if the thread does not have a user-given name. */
|
|
char *name = NULL;
|
|
|
|
/* Non-zero means the thread is executing. Note: this is different
|
|
from saying that there is an active target and we are stopped at
|
|
a breakpoint, for instance. This is a real indicator whether the
|
|
thread is off and running. */
|
|
int executing = 0;
|
|
|
|
/* Non-zero if this thread is resumed from infrun's perspective.
|
|
Note that a thread can be marked both as not-executing and
|
|
resumed at the same time. This happens if we try to resume a
|
|
thread that has a wait status pending. We shouldn't let the
|
|
thread really run until that wait status has been processed, but
|
|
we should not process that wait status if we didn't try to let
|
|
the thread run. */
|
|
int resumed = 0;
|
|
|
|
/* Frontend view of the thread state. Note that the THREAD_RUNNING/
|
|
THREAD_STOPPED states are different from EXECUTING. When the
|
|
thread is stopped internally while handling an internal event,
|
|
like a software single-step breakpoint, EXECUTING will be false,
|
|
but STATE will still be THREAD_RUNNING. */
|
|
enum thread_state state = THREAD_STOPPED;
|
|
|
|
/* State of GDB control of inferior thread execution.
|
|
See `struct thread_control_state'. */
|
|
thread_control_state control {};
|
|
|
|
/* State of inferior thread to restore after GDB is done with an inferior
|
|
call. See `struct thread_suspend_state'. */
|
|
thread_suspend_state suspend {};
|
|
|
|
int current_line = 0;
|
|
struct symtab *current_symtab = NULL;
|
|
|
|
/* Internal stepping state. */
|
|
|
|
/* Record the pc of the thread the last time it was resumed. (It
|
|
can't be done on stop as the PC may change since the last stop,
|
|
e.g., "return" command, or "p $pc = 0xf000"). This is maintained
|
|
by proceed and keep_going, and among other things, it's used in
|
|
adjust_pc_after_break to distinguish a hardware single-step
|
|
SIGTRAP from a breakpoint SIGTRAP. */
|
|
CORE_ADDR prev_pc = 0;
|
|
|
|
/* Did we set the thread stepping a breakpoint instruction? This is
|
|
used in conjunction with PREV_PC to decide whether to adjust the
|
|
PC. */
|
|
int stepped_breakpoint = 0;
|
|
|
|
/* Should we step over breakpoint next time keep_going is called? */
|
|
int stepping_over_breakpoint = 0;
|
|
|
|
/* Should we step over a watchpoint next time keep_going is called?
|
|
This is needed on targets with non-continuable, non-steppable
|
|
watchpoints. */
|
|
int stepping_over_watchpoint = 0;
|
|
|
|
/* Set to TRUE if we should finish single-stepping over a breakpoint
|
|
after hitting the current step-resume breakpoint. The context here
|
|
is that GDB is to do `next' or `step' while signal arrives.
|
|
When stepping over a breakpoint and signal arrives, GDB will attempt
|
|
to skip signal handler, so it inserts a step_resume_breakpoint at the
|
|
signal return address, and resume inferior.
|
|
step_after_step_resume_breakpoint is set to TRUE at this moment in
|
|
order to keep GDB in mind that there is still a breakpoint to step over
|
|
when GDB gets back SIGTRAP from step_resume_breakpoint. */
|
|
int step_after_step_resume_breakpoint = 0;
|
|
|
|
/* Pointer to the state machine manager object that handles what is
|
|
left to do for the thread's execution command after the target
|
|
stops. Several execution commands use it. */
|
|
struct thread_fsm *thread_fsm = NULL;
|
|
|
|
/* This is used to remember when a fork or vfork event was caught by
|
|
a catchpoint, and thus the event is to be followed at the next
|
|
resume of the thread, and not immediately. */
|
|
struct target_waitstatus pending_follow;
|
|
|
|
/* True if this thread has been explicitly requested to stop. */
|
|
int stop_requested = 0;
|
|
|
|
/* The initiating frame of a nexting operation, used for deciding
|
|
which exceptions to intercept. If it is null_frame_id no
|
|
bp_longjmp or bp_exception but longjmp has been caught just for
|
|
bp_longjmp_call_dummy. */
|
|
struct frame_id initiating_frame = null_frame_id;
|
|
|
|
/* Private data used by the target vector implementation. */
|
|
struct private_thread_info *priv = NULL;
|
|
|
|
/* Function that is called to free PRIVATE. If this is NULL, then
|
|
xfree will be called on PRIVATE. */
|
|
void (*private_dtor) (struct private_thread_info *) = NULL;
|
|
|
|
/* Branch trace information for this thread. */
|
|
struct btrace_thread_info btrace {};
|
|
|
|
/* Flag which indicates that the stack temporaries should be stored while
|
|
evaluating expressions. */
|
|
int stack_temporaries_enabled = 0;
|
|
|
|
/* Values that are stored as temporaries on stack while evaluating
|
|
expressions. */
|
|
value_vec *stack_temporaries = NULL;
|
|
|
|
/* Step-over chain. A thread is in the step-over queue if these are
|
|
non-NULL. If only a single thread is in the chain, then these
|
|
fields point to self. */
|
|
struct thread_info *step_over_prev = NULL;
|
|
struct thread_info *step_over_next = NULL;
|
|
};
|
|
|
|
/* Create an empty thread list, or empty the existing one. */
|
|
extern void init_thread_list (void);
|
|
|
|
/* Add a thread to the thread list, print a message
|
|
that a new thread is found, and return the pointer to
|
|
the new thread. Caller my use this pointer to
|
|
initialize the private thread data. */
|
|
extern struct thread_info *add_thread (ptid_t ptid);
|
|
|
|
/* Same as add_thread, but does not print a message
|
|
about new thread. */
|
|
extern struct thread_info *add_thread_silent (ptid_t ptid);
|
|
|
|
/* Same as add_thread, and sets the private info. */
|
|
extern struct thread_info *add_thread_with_info (ptid_t ptid,
|
|
struct private_thread_info *);
|
|
|
|
/* Delete an existing thread list entry. */
|
|
extern void delete_thread (ptid_t);
|
|
|
|
/* Delete an existing thread list entry, and be quiet about it. Used
|
|
after the process this thread having belonged to having already
|
|
exited, for example. */
|
|
extern void delete_thread_silent (ptid_t);
|
|
|
|
/* Delete a step_resume_breakpoint from the thread database. */
|
|
extern void delete_step_resume_breakpoint (struct thread_info *);
|
|
|
|
/* Delete an exception_resume_breakpoint from the thread database. */
|
|
extern void delete_exception_resume_breakpoint (struct thread_info *);
|
|
|
|
/* Delete the single-step breakpoints of thread TP, if any. */
|
|
extern void delete_single_step_breakpoints (struct thread_info *tp);
|
|
|
|
/* Check if the thread has software single stepping breakpoints
|
|
set. */
|
|
extern int thread_has_single_step_breakpoints_set (struct thread_info *tp);
|
|
|
|
/* Check whether the thread has software single stepping breakpoints
|
|
set at PC. */
|
|
extern int thread_has_single_step_breakpoint_here (struct thread_info *tp,
|
|
struct address_space *aspace,
|
|
CORE_ADDR addr);
|
|
|
|
/* Translate the global integer thread id (GDB's homegrown id, not the
|
|
system's) into a "pid" (which may be overloaded with extra thread
|
|
information). */
|
|
extern ptid_t global_thread_id_to_ptid (int num);
|
|
|
|
/* Translate a 'pid' (which may be overloaded with extra thread
|
|
information) into the global integer thread id (GDB's homegrown id,
|
|
not the system's). */
|
|
extern int ptid_to_global_thread_id (ptid_t ptid);
|
|
|
|
/* Returns whether to show inferior-qualified thread IDs, or plain
|
|
thread numbers. Inferior-qualified IDs are shown whenever we have
|
|
multiple inferiors, or the only inferior left has number > 1. */
|
|
extern int show_inferior_qualified_tids (void);
|
|
|
|
/* Return a string version of THR's thread ID. If there are multiple
|
|
inferiors, then this prints the inferior-qualifier form, otherwise
|
|
it only prints the thread number. The result is stored in a
|
|
circular static buffer, NUMCELLS deep. */
|
|
const char *print_thread_id (struct thread_info *thr);
|
|
|
|
/* Boolean test for an already-known pid (which may be overloaded with
|
|
extra thread information). */
|
|
extern int in_thread_list (ptid_t ptid);
|
|
|
|
/* Boolean test for an already-known global thread id (GDB's homegrown
|
|
global id, not the system's). */
|
|
extern int valid_global_thread_id (int global_id);
|
|
|
|
/* Search function to lookup a thread by 'pid'. */
|
|
extern struct thread_info *find_thread_ptid (ptid_t ptid);
|
|
|
|
/* Find thread by GDB global thread ID. */
|
|
struct thread_info *find_thread_global_id (int global_id);
|
|
|
|
/* Find thread by thread library specific handle in inferior INF. */
|
|
struct thread_info *find_thread_by_handle (struct value *thread_handle,
|
|
struct inferior *inf);
|
|
|
|
/* Finds the first thread of the inferior given by PID. If PID is -1,
|
|
returns the first thread in the list. */
|
|
struct thread_info *first_thread_of_process (int pid);
|
|
|
|
/* Returns any thread of process PID, giving preference to the current
|
|
thread. */
|
|
extern struct thread_info *any_thread_of_process (int pid);
|
|
|
|
/* Returns any non-exited thread of process PID, giving preference to
|
|
the current thread, and to not executing threads. */
|
|
extern struct thread_info *any_live_thread_of_process (int pid);
|
|
|
|
/* Change the ptid of thread OLD_PTID to NEW_PTID. */
|
|
void thread_change_ptid (ptid_t old_ptid, ptid_t new_ptid);
|
|
|
|
/* Iterator function to call a user-provided callback function
|
|
once for each known thread. */
|
|
typedef int (*thread_callback_func) (struct thread_info *, void *);
|
|
extern struct thread_info *iterate_over_threads (thread_callback_func, void *);
|
|
|
|
/* Traverse all threads. */
|
|
#define ALL_THREADS(T) \
|
|
for (T = thread_list; T; T = T->next) \
|
|
|
|
/* Traverse over all threads, sorted by inferior. */
|
|
#define ALL_THREADS_BY_INFERIOR(inf, tp) \
|
|
ALL_INFERIORS (inf) \
|
|
ALL_THREADS (tp) \
|
|
if (inf == tp->inf)
|
|
|
|
/* Traverse all threads, except those that have THREAD_EXITED
|
|
state. */
|
|
|
|
#define ALL_NON_EXITED_THREADS(T) \
|
|
for (T = thread_list; T; T = T->next) \
|
|
if ((T)->state != THREAD_EXITED)
|
|
|
|
/* Traverse all threads, including those that have THREAD_EXITED
|
|
state. Allows deleting the currently iterated thread. */
|
|
#define ALL_THREADS_SAFE(T, TMP) \
|
|
for ((T) = thread_list; \
|
|
(T) != NULL ? ((TMP) = (T)->next, 1): 0; \
|
|
(T) = (TMP))
|
|
|
|
extern int thread_count (void);
|
|
|
|
/* Switch from one thread to another. Does not read registers and
|
|
sets STOP_PC to -1. */
|
|
extern void switch_to_thread_no_regs (struct thread_info *thread);
|
|
|
|
/* Marks or clears thread(s) PTID as resumed. If PTID is
|
|
MINUS_ONE_PTID, applies to all threads. If ptid_is_pid(PTID) is
|
|
true, applies to all threads of the process pointed at by PTID. */
|
|
extern void set_resumed (ptid_t ptid, int resumed);
|
|
|
|
/* Marks thread PTID is running, or stopped.
|
|
If PTID is minus_one_ptid, marks all threads. */
|
|
extern void set_running (ptid_t ptid, int running);
|
|
|
|
/* Marks or clears thread(s) PTID as having been requested to stop.
|
|
If PTID is MINUS_ONE_PTID, applies to all threads. If
|
|
ptid_is_pid(PTID) is true, applies to all threads of the process
|
|
pointed at by PTID. If STOP, then the THREAD_STOP_REQUESTED
|
|
observer is called with PTID as argument. */
|
|
extern void set_stop_requested (ptid_t ptid, int stop);
|
|
|
|
/* NOTE: Since the thread state is not a boolean, most times, you do
|
|
not want to check it with negation. If you really want to check if
|
|
the thread is stopped,
|
|
|
|
use (good):
|
|
|
|
if (is_stopped (ptid))
|
|
|
|
instead of (bad):
|
|
|
|
if (!is_running (ptid))
|
|
|
|
The latter also returns true on exited threads, most likelly not
|
|
what you want. */
|
|
|
|
/* Reports if in the frontend's perpective, thread PTID is running. */
|
|
extern int is_running (ptid_t ptid);
|
|
|
|
/* Is this thread listed, but known to have exited? We keep it listed
|
|
(but not visible) until it's safe to delete. */
|
|
extern int is_exited (ptid_t ptid);
|
|
|
|
/* In the frontend's perpective, is this thread stopped? */
|
|
extern int is_stopped (ptid_t ptid);
|
|
|
|
/* Marks thread PTID as executing, or not. If PTID is minus_one_ptid,
|
|
marks all threads.
|
|
|
|
Note that this is different from the running state. See the
|
|
description of state and executing fields of struct
|
|
thread_info. */
|
|
extern void set_executing (ptid_t ptid, int executing);
|
|
|
|
/* Reports if thread PTID is executing. */
|
|
extern int is_executing (ptid_t ptid);
|
|
|
|
/* True if any (known or unknown) thread is or may be executing. */
|
|
extern int threads_are_executing (void);
|
|
|
|
/* Merge the executing property of thread PTID over to its thread
|
|
state property (frontend running/stopped view).
|
|
|
|
"not executing" -> "stopped"
|
|
"executing" -> "running"
|
|
"exited" -> "exited"
|
|
|
|
If PTID is minus_one_ptid, go over all threads.
|
|
|
|
Notifications are only emitted if the thread state did change. */
|
|
extern void finish_thread_state (ptid_t ptid);
|
|
|
|
/* Same as FINISH_THREAD_STATE, but with an interface suitable to be
|
|
registered as a cleanup. PTID_P points to the ptid_t that is
|
|
passed to FINISH_THREAD_STATE. */
|
|
extern void finish_thread_state_cleanup (void *ptid_p);
|
|
|
|
/* Commands with a prefix of `thread'. */
|
|
extern struct cmd_list_element *thread_cmd_list;
|
|
|
|
extern void thread_command (char *tidstr, int from_tty);
|
|
|
|
/* Print notices on thread events (attach, detach, etc.), set with
|
|
`set print thread-events'. */
|
|
extern int print_thread_events;
|
|
|
|
/* Prints the list of threads and their details on UIOUT. If
|
|
REQUESTED_THREADS, a list of GDB ids/ranges, is not NULL, only
|
|
print threads whose ID is included in the list. If PID is not -1,
|
|
only print threads from the process PID. Otherwise, threads from
|
|
all attached PIDs are printed. If both REQUESTED_THREADS is not
|
|
NULL and PID is not -1, then the thread is printed if it belongs to
|
|
the specified process. Otherwise, an error is raised. */
|
|
extern void print_thread_info (struct ui_out *uiout, char *requested_threads,
|
|
int pid);
|
|
|
|
/* Save/restore current inferior/thread/frame. */
|
|
|
|
class scoped_restore_current_thread
|
|
{
|
|
public:
|
|
scoped_restore_current_thread ();
|
|
~scoped_restore_current_thread ();
|
|
|
|
DISABLE_COPY_AND_ASSIGN (scoped_restore_current_thread);
|
|
|
|
private:
|
|
thread_info *m_thread;
|
|
inferior *m_inf;
|
|
frame_id m_selected_frame_id;
|
|
int m_selected_frame_level;
|
|
bool m_was_stopped;
|
|
};
|
|
|
|
/* Returns a pointer into the thread_info corresponding to
|
|
INFERIOR_PTID. INFERIOR_PTID *must* be in the thread list. */
|
|
extern struct thread_info* inferior_thread (void);
|
|
|
|
extern void update_thread_list (void);
|
|
|
|
/* Delete any thread the target says is no longer alive. */
|
|
|
|
extern void prune_threads (void);
|
|
|
|
/* Delete threads marked THREAD_EXITED. Unlike prune_threads, this
|
|
does not consult the target about whether the thread is alive right
|
|
now. */
|
|
extern void delete_exited_threads (void);
|
|
|
|
/* Return true if PC is in the stepping range of THREAD. */
|
|
|
|
int pc_in_thread_step_range (CORE_ADDR pc, struct thread_info *thread);
|
|
|
|
extern struct cleanup *enable_thread_stack_temporaries (ptid_t ptid);
|
|
|
|
extern int thread_stack_temporaries_enabled_p (ptid_t ptid);
|
|
|
|
extern void push_thread_stack_temporary (ptid_t ptid, struct value *v);
|
|
|
|
extern struct value *get_last_thread_stack_temporary (ptid_t);
|
|
|
|
extern int value_in_thread_stack_temporaries (struct value *, ptid_t);
|
|
|
|
/* Add TP to the end of its inferior's pending step-over chain. */
|
|
|
|
extern void thread_step_over_chain_enqueue (struct thread_info *tp);
|
|
|
|
/* Remove TP from its inferior's pending step-over chain. */
|
|
|
|
extern void thread_step_over_chain_remove (struct thread_info *tp);
|
|
|
|
/* Return the next thread in the step-over chain starting at TP. NULL
|
|
if TP is the last entry in the chain. */
|
|
|
|
extern struct thread_info *thread_step_over_chain_next (struct thread_info *tp);
|
|
|
|
/* Return true if TP is in the step-over chain. */
|
|
|
|
extern int thread_is_in_step_over_chain (struct thread_info *tp);
|
|
|
|
/* Cancel any ongoing execution command. */
|
|
|
|
extern void thread_cancel_execution_command (struct thread_info *thr);
|
|
|
|
/* Check whether it makes sense to access a register of the current
|
|
thread at this point. If not, throw an error (e.g., the thread is
|
|
executing). */
|
|
extern void validate_registers_access (void);
|
|
|
|
/* Check whether it makes sense to access a register of PTID at this point.
|
|
Returns true if registers may be accessed; false otherwise. */
|
|
extern bool can_access_registers_ptid (ptid_t ptid);
|
|
|
|
/* Returns whether to show which thread hit the breakpoint, received a
|
|
signal, etc. and ended up causing a user-visible stop. This is
|
|
true iff we ever detected multiple threads. */
|
|
extern int show_thread_that_caused_stop (void);
|
|
|
|
/* Print the message for a thread or/and frame selected. */
|
|
extern void print_selected_thread_frame (struct ui_out *uiout,
|
|
user_selected_what selection);
|
|
|
|
extern struct thread_info *thread_list;
|
|
|
|
#endif /* GDBTHREAD_H */
|