/* Native debugging support for GNU/Linux (LWP layer).
- Copyright (C) 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009
- Free Software Foundation, Inc.
+ Copyright (C) 2000-2016 Free Software Foundation, Inc.
This file is part of GDB.
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 "nat/linux-nat.h"
#include "target.h"
-
#include <signal.h>
+struct arch_lwp_info;
+
/* Structure describing an LWP. This is public only for the purposes
of ALL_LWPS; target-specific code should generally not access it
directly. */
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;
+ /* If this flag is set, we need to set the event request flags the
+ next time we see this LWP stop. */
+ int must_set_ptrace_flags;
/* Non-zero if we sent this LWP a SIGSTOP (but the LWP didn't report
it back yet). */
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;
+ /* When 'stopped' is set, this is where the lwp last stopped, with
+ decr_pc_after_break already accounted for. If the LWP is
+ running, and stepping, this is the address at which the lwp was
+ resumed (that is, it's the previous stop PC). If the LWP is
+ running and not stepping, this is 0. */
+ CORE_ADDR stop_pc;
+
/* 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;
+ /* The reason the LWP last stopped, if we need to track it
+ (breakpoint, watchpoint, etc.) */
+ enum target_stop_reason stop_reason;
/* On architectures where it is possible to know the data address of
a triggered watchpoint, STOPPED_DATA_ADDRESS_P is non-zero, and
Values:
- TARGET_WAITKIND_SYSCALL_ENTRY
- TARGET_WAITKIND_SYSCALL_RETURN */
- int syscall_state;
+ enum target_waitkind 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;
native target is active. */
extern struct lwp_info *lwp_list;
-/* Iterate over the PTID each active thread (light-weight process). There
- must be at least one. */
-#define ALL_LWPS(LP, PTID) \
- for ((LP) = lwp_list, (PTID) = (LP)->ptid; \
- (LP) != NULL; \
- (LP) = (LP)->next, (PTID) = (LP) ? (LP)->ptid : (PTID))
+/* Does the current host support PTRACE_GETREGSET? */
+extern enum tribool have_ptrace_getregset;
-#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)
+/* Iterate over each active thread (light-weight process). */
+#define ALL_LWPS(LP) \
+ for ((LP) = lwp_list; \
+ (LP) != NULL; \
+ (LP) = (LP)->next)
/* Attempt to initialize libthread_db. */
void check_for_thread_db (void);
-int thread_db_attach_lwp (ptid_t ptid);
+/* Called from the LWP layer to inform the thread_db layer that PARENT
+ spawned CHILD. Both LWPs are currently stopped. This function
+ does whatever is required to have the child LWP under the
+ thread_db's control --- e.g., enabling event reporting. Returns
+ true on success, false if the process isn't using libpthread. */
+extern int thread_db_notice_clone (ptid_t parent, ptid_t child);
-/* 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);
+/* Return the set of signals used by the threads library. */
+extern void lin_thread_get_thread_signals (sigset_t *mask);
-/* Return the TGID of LWPID from /proc/pid/status. Returns -1 if not
- found. */
-extern int linux_proc_get_tgid (int lwpid);
+/* 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);
+/* For linux_stop_lwp see nat/linux-nat.h. */
-extern int lin_lwp_attach_lwp (ptid_t ptid);
+/* Stop all LWPs, synchronously. (Any events that trigger while LWPs
+ are being stopped are left pending.) */
+extern void linux_stop_and_wait_all_lwps (void);
-/* 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);
+/* Set resumed LWPs running again, as they were before being stopped
+ with linux_stop_and_wait_all_lwps. (LWPS with pending events are
+ left stopped.) */
+extern void linux_unstop_all_lwps (void);
/* Create a prototype generic GNU/Linux target. The client can
override it with local methods. */
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 (*) (ptid_t));
+void linux_nat_set_new_thread (struct target_ops *, void (*) (struct lwp_info *));
+
+
+/* Register a method to call whenever a new fork is attached. */
+typedef void (linux_nat_new_fork_ftype) (struct lwp_info *parent,
+ pid_t child_pid);
+void linux_nat_set_new_fork (struct target_ops *ops,
+ linux_nat_new_fork_ftype *fn);
+
+/* Register a method to call whenever a process is killed or
+ detached. */
+typedef void (linux_nat_forget_process_ftype) (pid_t pid);
+void linux_nat_set_forget_process (struct target_ops *ops,
+ linux_nat_forget_process_ftype *fn);
+
+/* Call the method registered with the function above. PID is the
+ process to forget about. */
+void linux_nat_forget_process (pid_t pid);
/* 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 *,
+ int (*) (siginfo_t *,
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);
+/* Store the saved siginfo associated with PTID in *SIGINFO.
+ Return 1 if it was retrieved successfully, 0 otherwise (*SIGINFO is
+ uninitialized in such case). */
+int linux_nat_get_siginfo (ptid_t ptid, siginfo_t *siginfo);
+
+/* Set alternative SIGTRAP-like events recognizer. */
+void linux_nat_set_status_is_event (struct target_ops *t,
+ int (*status_is_event) (int status));
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