/* Native-dependent code for FreeBSD.
- Copyright (C) 2002-2016 Free Software Foundation, Inc.
+ Copyright (C) 2002-2017 Free Software Foundation, Inc.
This file is part of GDB.
FreeBSD's first thread support was via a "reentrant" version of libc
(libc_r) that first shipped in 2.2.7. This library multiplexed all
of the threads in a process onto a single kernel thread. This
- library is supported via the bsd-uthread target.
+ library was supported via the bsd-uthread target.
FreeBSD 5.1 introduced two new threading libraries that made use of
multiple kernel threads. The first (libkse) scheduled M user
/* Convert PTID to a string. Returns the string in a static
buffer. */
-static char *
+static const char *
fbsd_pid_to_str (struct target_ops *ops, ptid_t ptid)
{
lwpid_t lwp;
sizeof (events)) == -1)
perror_with_name (("ptrace"));
events |= PTRACE_FORK | PTRACE_LWP;
+#ifdef PTRACE_VFORK
+ events |= PTRACE_VFORK;
+#endif
if (ptrace (PT_SET_EVENT_MASK, pid, (PTRACE_TYPE_ARG3)&events,
sizeof (events)) == -1)
perror_with_name (("ptrace"));
return null_ptid;
}
+#ifndef PTRACE_VFORK
static struct fbsd_fork_info *fbsd_pending_vfork_done;
/* Record a pending vfork done event. */
return null_ptid;
}
#endif
-
-static int
-resume_one_thread_cb (struct thread_info *tp, void *data)
-{
- ptid_t *ptid = (ptid_t *) data;
- int request;
-
- if (ptid_get_pid (tp->ptid) != ptid_get_pid (*ptid))
- return 0;
-
- if (ptid_get_lwp (tp->ptid) == ptid_get_lwp (*ptid))
- request = PT_RESUME;
- else
- request = PT_SUSPEND;
-
- if (ptrace (request, ptid_get_lwp (tp->ptid), NULL, 0) == -1)
- perror_with_name (("ptrace"));
- return 0;
-}
-
-static int
-resume_all_threads_cb (struct thread_info *tp, void *data)
-{
- ptid_t *filter = (ptid_t *) data;
-
- if (!ptid_match (tp->ptid, *filter))
- return 0;
-
- if (ptrace (PT_RESUME, ptid_get_lwp (tp->ptid), NULL, 0) == -1)
- perror_with_name (("ptrace"));
- return 0;
-}
+#endif
/* Implement the "to_resume" target_ops method. */
fbsd_resume (struct target_ops *ops,
ptid_t ptid, int step, enum gdb_signal signo)
{
-#ifdef TDP_RFPPWAIT
+#if defined(TDP_RFPPWAIT) && !defined(PTRACE_VFORK)
pid_t pid;
/* Don't PT_CONTINUE a process which has a pending vfork done event. */
if (ptid_lwp_p (ptid))
{
/* If ptid is a specific LWP, suspend all other LWPs in the process. */
- iterate_over_threads (resume_one_thread_cb, &ptid);
+ struct thread_info *tp;
+ int request;
+
+ ALL_NON_EXITED_THREADS (tp)
+ {
+ if (ptid_get_pid (tp->ptid) != ptid_get_pid (ptid))
+ continue;
+
+ if (ptid_get_lwp (tp->ptid) == ptid_get_lwp (ptid))
+ request = PT_RESUME;
+ else
+ request = PT_SUSPEND;
+
+ if (ptrace (request, ptid_get_lwp (tp->ptid), NULL, 0) == -1)
+ perror_with_name (("ptrace"));
+ }
}
else
{
/* If ptid is a wildcard, resume all matching threads (they won't run
until the process is continued however). */
- iterate_over_threads (resume_all_threads_cb, &ptid);
+ struct thread_info *tp;
+
+ ALL_NON_EXITED_THREADS (tp)
+ {
+ if (!ptid_match (tp->ptid, ptid))
+ continue;
+
+ if (ptrace (PT_RESUME, ptid_get_lwp (tp->ptid), NULL, 0) == -1)
+ perror_with_name (("ptrace"));
+ }
ptid = inferior_ptid;
}
super_resume (ops, ptid, step, signo);
while (1)
{
+#ifndef PTRACE_VFORK
wptid = fbsd_next_vfork_done ();
if (!ptid_equal (wptid, null_ptid))
{
ourstatus->kind = TARGET_WAITKIND_VFORK_DONE;
return wptid;
}
+#endif
wptid = super_wait (ops, ptid, ourstatus, target_options);
if (ourstatus->kind == TARGET_WAITKIND_STOPPED)
{
#ifdef TDP_RFPPWAIT
if (pl.pl_flags & PL_FLAG_FORKED)
{
+#ifndef PTRACE_VFORK
struct kinfo_proc kp;
+#endif
ptid_t child_ptid;
pid_t child;
child = pl.pl_child_pid;
ourstatus->kind = TARGET_WAITKIND_FORKED;
+#ifdef PTRACE_VFORK
+ if (pl.pl_flags & PL_FLAG_VFORKED)
+ ourstatus->kind = TARGET_WAITKIND_VFORKED;
+#endif
/* Make sure the other end of the fork is stopped too. */
child_ptid = fbsd_is_child_pending (child);
child_ptid = ptid_build (child, pl.pl_lwpid, 0);
}
+ /* Enable additional events on the child process. */
+ fbsd_enable_proc_events (ptid_get_pid (child_ptid));
+
+#ifndef PTRACE_VFORK
/* For vfork, the child process will have the P_PPWAIT
flag set. */
fbsd_fetch_kinfo_proc (child, &kp);
if (kp.ki_flag & P_PPWAIT)
ourstatus->kind = TARGET_WAITKIND_VFORKED;
+#endif
ourstatus->value.related_pid = child_ptid;
return wptid;
fbsd_remember_child (wptid);
continue;
}
+
+#ifdef PTRACE_VFORK
+ if (pl.pl_flags & PL_FLAG_VFORK_DONE)
+ {
+ ourstatus->kind = TARGET_WAITKIND_VFORK_DONE;
+ return wptid;
+ }
+#endif
#endif
#ifdef PL_FLAG_EXEC
if (!follow_child && detach_fork)
{
struct thread_info *tp = inferior_thread ();
- int has_vforked = tp->pending_follow.kind == TARGET_WAITKIND_VFORKED;
pid_t child_pid = ptid_get_pid (tp->pending_follow.value.related_pid);
/* Breakpoints have already been detached from the child by
if (ptrace (PT_DETACH, child_pid, (PTRACE_TYPE_ARG3)1, 0) == -1)
perror_with_name (("ptrace"));
- if (has_vforked)
+#ifndef PTRACE_VFORK
+ if (tp->pending_follow.kind == TARGET_WAITKIND_VFORKED)
{
/* We can't insert breakpoints until the child process has
finished with the shared memory region. The parent
wait. */
fbsd_add_vfork_done (inferior_ptid);
}
+#endif
}
return 0;
projects / deliverable / binutils-gdb.git / blobdiff