mirror of
https://sourceware.org/git/binutils-gdb.git
synced 2024-11-28 20:43:45 +08:00
203 lines
6.5 KiB
C
203 lines
6.5 KiB
C
/* Native debugging support for GNU/Linux (LWP layer).
|
|
|
|
Copyright (C) 2000-2012 Free Software Foundation, Inc.
|
|
|
|
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/>. */
|
|
|
|
#include "target.h"
|
|
|
|
#include <signal.h>
|
|
|
|
struct arch_lwp_info;
|
|
|
|
/* Ways to "resume" a thread. */
|
|
|
|
enum resume_kind
|
|
{
|
|
/* Thread should continue. */
|
|
resume_continue,
|
|
|
|
/* Thread should single-step. */
|
|
resume_step,
|
|
|
|
/* Thread should be stopped. */
|
|
resume_stop
|
|
};
|
|
|
|
/* Structure describing an LWP. This is public only for the purposes
|
|
of ALL_LWPS; target-specific code should generally not access it
|
|
directly. */
|
|
|
|
struct lwp_info
|
|
{
|
|
/* The process id of the LWP. This is a combination of the LWP id
|
|
and overall process id. */
|
|
ptid_t ptid;
|
|
|
|
/* Non-zero if this LWP is cloned. In this context "cloned" means
|
|
that the LWP is reporting to its parent using a signal other than
|
|
SIGCHLD. */
|
|
int cloned;
|
|
|
|
/* Non-zero if we sent this LWP a SIGSTOP (but the LWP didn't report
|
|
it back yet). */
|
|
int signalled;
|
|
|
|
/* Non-zero if this LWP is stopped. */
|
|
int stopped;
|
|
|
|
/* Non-zero if this LWP will be/has been resumed. Note that an LWP
|
|
can be marked both as stopped and resumed at the same time. This
|
|
happens if we try to resume an LWP that has a wait status
|
|
pending. We shouldn't let the LWP run until that wait status has
|
|
been processed, but we should not report that wait status if GDB
|
|
didn't try to let the LWP run. */
|
|
int resumed;
|
|
|
|
/* The last resume GDB requested on this thread. */
|
|
enum resume_kind last_resume_kind;
|
|
|
|
/* If non-zero, a pending wait status. */
|
|
int status;
|
|
|
|
/* Non-zero if we were stepping this LWP. */
|
|
int step;
|
|
|
|
/* Non-zero si_signo if this LWP stopped with a trap. si_addr may
|
|
be the address of a hardware watchpoint. */
|
|
struct siginfo siginfo;
|
|
|
|
/* STOPPED_BY_WATCHPOINT is non-zero if this LWP stopped with a data
|
|
watchpoint trap. */
|
|
int stopped_by_watchpoint;
|
|
|
|
/* On architectures where it is possible to know the data address of
|
|
a triggered watchpoint, STOPPED_DATA_ADDRESS_P is non-zero, and
|
|
STOPPED_DATA_ADDRESS contains such data address. Otherwise,
|
|
STOPPED_DATA_ADDRESS_P is false, and STOPPED_DATA_ADDRESS is
|
|
undefined. Only valid if STOPPED_BY_WATCHPOINT is true. */
|
|
int stopped_data_address_p;
|
|
CORE_ADDR stopped_data_address;
|
|
|
|
/* Non-zero if we expect a duplicated SIGINT. */
|
|
int ignore_sigint;
|
|
|
|
/* If WAITSTATUS->KIND != TARGET_WAITKIND_SPURIOUS, the waitstatus
|
|
for this LWP's last event. This may correspond to STATUS above,
|
|
or to a local variable in lin_lwp_wait. */
|
|
struct target_waitstatus waitstatus;
|
|
|
|
/* Signal wether we are in a SYSCALL_ENTRY or
|
|
in a SYSCALL_RETURN event.
|
|
Values:
|
|
- TARGET_WAITKIND_SYSCALL_ENTRY
|
|
- TARGET_WAITKIND_SYSCALL_RETURN */
|
|
int syscall_state;
|
|
|
|
/* The processor core this LWP was last seen on. */
|
|
int core;
|
|
|
|
/* Arch-specific additions. */
|
|
struct arch_lwp_info *arch_private;
|
|
|
|
/* Next LWP in list. */
|
|
struct lwp_info *next;
|
|
};
|
|
|
|
/* The global list of LWPs, for ALL_LWPS. Unlike the threads list,
|
|
there is always at least one LWP on the list while the GNU/Linux
|
|
native target is active. */
|
|
extern struct lwp_info *lwp_list;
|
|
|
|
/* Iterate over each active thread (light-weight process). */
|
|
#define ALL_LWPS(LP) \
|
|
for ((LP) = lwp_list; \
|
|
(LP) != NULL; \
|
|
(LP) = (LP)->next)
|
|
|
|
#define GET_LWP(ptid) ptid_get_lwp (ptid)
|
|
#define GET_PID(ptid) ptid_get_pid (ptid)
|
|
#define is_lwp(ptid) (GET_LWP (ptid) != 0)
|
|
#define BUILD_LWP(lwp, pid) ptid_build (pid, lwp, 0)
|
|
|
|
/* Attempt to initialize libthread_db. */
|
|
void check_for_thread_db (void);
|
|
|
|
int thread_db_attach_lwp (ptid_t ptid);
|
|
|
|
/* Return the set of signals used by the threads library. */
|
|
extern void lin_thread_get_thread_signals (sigset_t *mask);
|
|
|
|
/* Find process PID's pending signal set from /proc/pid/status. */
|
|
void linux_proc_pending_signals (int pid, sigset_t *pending,
|
|
sigset_t *blocked, sigset_t *ignored);
|
|
|
|
/* linux-nat functions for handling fork events. */
|
|
extern void linux_enable_event_reporting (ptid_t ptid);
|
|
|
|
extern int lin_lwp_attach_lwp (ptid_t ptid);
|
|
|
|
extern void linux_stop_lwp (struct lwp_info *lwp);
|
|
|
|
/* Iterator function for lin-lwp's lwp list. */
|
|
struct lwp_info *iterate_over_lwps (ptid_t filter,
|
|
int (*callback) (struct lwp_info *,
|
|
void *),
|
|
void *data);
|
|
|
|
/* Create a prototype generic GNU/Linux target. The client can
|
|
override it with local methods. */
|
|
struct target_ops * linux_target (void);
|
|
|
|
/* Create a generic GNU/Linux target using traditional
|
|
ptrace register access. */
|
|
struct target_ops *
|
|
linux_trad_target (CORE_ADDR (*register_u_offset)(struct gdbarch *, int, int));
|
|
|
|
/* Register the customized GNU/Linux target. This should be used
|
|
instead of calling add_target directly. */
|
|
void linux_nat_add_target (struct target_ops *);
|
|
|
|
/* Register a method to call whenever a new thread is attached. */
|
|
void linux_nat_set_new_thread (struct target_ops *, void (*) (struct lwp_info *));
|
|
|
|
/* Register a method that converts a siginfo object between the layout
|
|
that ptrace returns, and the layout in the architecture of the
|
|
inferior. */
|
|
void linux_nat_set_siginfo_fixup (struct target_ops *,
|
|
int (*) (struct siginfo *,
|
|
gdb_byte *,
|
|
int));
|
|
|
|
/* Register a method to call prior to resuming a thread. */
|
|
|
|
void linux_nat_set_prepare_to_resume (struct target_ops *,
|
|
void (*) (struct lwp_info *));
|
|
|
|
/* Update linux-nat internal state when changing from one fork
|
|
to another. */
|
|
void linux_nat_switch_fork (ptid_t new_ptid);
|
|
|
|
/* Return the saved siginfo associated with PTID. */
|
|
struct siginfo *linux_nat_get_siginfo (ptid_t ptid);
|
|
|
|
/* Compute and return the processor core of a given thread. */
|
|
int linux_nat_core_of_thread_1 (ptid_t ptid);
|
|
|
|
/* Set alternative SIGTRAP-like events recognizer. */
|
|
void linux_nat_set_status_is_event (struct target_ops *t,
|
|
int (*status_is_event) (int status));
|