bool
fbsd_nat_target::thread_alive (ptid_t ptid)
{
if (ptid.lwp_p ())
{
struct ptrace_lwpinfo pl;
if (ptrace (PT_LWPINFO, ptid.lwp (), (caddr_t) &pl, sizeof pl)
== -1)
return false;
#ifdef PL_FLAG_EXITED
if (pl.pl_flags & PL_FLAG_EXITED)
return false;
#endif
}
return true;
}
void
fbsd_nat_target::resume (ptid_t ptid, int step, enum gdb_signal signo)
{
#if defined(TDP_RFPPWAIT) && !defined(PTRACE_VFORK)
pid_t pid;
/* Don't PT_CONTINUE a process which has a pending vfork done event. */
if (minus_one_ptid == ptid)
pid = inferior_ptid.pid ();
else
pid = ptid.pid ();
if (fbsd_is_vfork_done_pending (pid))
return;
#endif
if (debug_fbsd_lwp)
fprintf_unfiltered (gdb_stdlog,
"FLWP: fbsd_resume for ptid (%d, %ld, %ld)\n",
ptid.pid (), ptid.lwp (),
ptid.tid ());
if (ptid.lwp_p ())
{
/* If ptid is a specific LWP, suspend all other LWPs in the process. */
struct thread_info *tp;
int request;
ALL_NON_EXITED_THREADS (tp)
{
if (tp->ptid.pid () != ptid.pid ())
continue;
if (tp->ptid.lwp () == ptid.lwp ())
request = PT_RESUME;
else
request = PT_SUSPEND;
if (ptrace (request, tp->ptid.lwp (), NULL, 0) == -1)
perror_with_name (("ptrace"));
}
}
else
{
namespace ptid {
/* Check that the ptid_t class is POD.
This is a requirement for as long as we have ptids embedded in
structures allocated with malloc. */
static_assert (std::is_pod<ptid_t>::value, "ptid_t is POD");
/* We want to avoid implicit conversion from int to ptid_t. */
static_assert (!std::is_convertible<int, ptid_t>::value,
"constructor is explicit");
/* Build some useful ptids. */
static constexpr ptid_t pid = ptid_t (1);
static constexpr ptid_t lwp = ptid_t (1, 2, 0);
static constexpr ptid_t tid = ptid_t (1, 0, 2);
static constexpr ptid_t both = ptid_t (1, 2, 2);
/* Build some constexpr version of null_ptid and minus_one_ptid to use in
static_assert. Once the real ones are made constexpr, we can get rid of
these. */
static constexpr ptid_t null = ptid_t::make_null ();
static constexpr ptid_t minus_one = ptid_t::make_minus_one ();
/* Verify pid. */
static_assert (pid.pid () == 1, "pid's pid is right");
static_assert (lwp.pid () == 1, "lwp's pid is right");
static_assert (tid.pid () == 1, "tid's pid is right");
static_assert (both.pid () == 1, "both's pid is right");
/* Verify lwp_p. */
static_assert (!pid.lwp_p (), "pid's lwp_p is right");
static_assert (lwp.lwp_p (), "lwp's lwp_p is right");
static_assert (!tid.lwp_p (), "tid's lwp_p is right");
static_assert (both.lwp_p (), "both's lwp_p is right");
/* Verify lwp. */
static_assert (pid.lwp () == 0, "pid's lwp is right");
static_assert (lwp.lwp () == 2, "lwp's lwp is right");
static_assert (tid.lwp () == 0, "tid's lwp is right");
static_assert (both.lwp () == 2, "both's lwp is right");
/* Verify tid_p. */
static_assert (!pid.tid_p (), "pid's tid_p is right");
static_assert (!lwp.tid_p (), "lwp's tid_p is right");
static_assert (tid.tid_p (), "tid's tid_p is right");
static_assert (both.tid_p (), "both's tid_p is right");
/* Verify tid. */
static_assert (pid.tid () == 0, "pid's tid is right");
static_assert (lwp.tid () == 0, "lwp's tid is right");
static_assert (tid.tid () == 2, "tid's tid is right");
static_assert (both.tid () == 2, "both's tid is right");
/* Verify is_pid. */
static_assert (pid.is_pid (), "pid is a pid");
static_assert (!lwp.is_pid (), "lwp isn't a pid");
static_assert (!tid.is_pid (), "tid isn't a pid");
static_assert (!both.is_pid (), "both isn't a pid");
static_assert (!null.is_pid (), "null ptid isn't a pid");
static_assert (!minus_one.is_pid (), "minus one ptid isn't a pid");
/* Verify operator ==. */
static_assert (pid == ptid_t (1, 0, 0), "pid operator== is right");
static_assert (lwp == ptid_t (1, 2, 0), "lwp operator== is right");
static_assert (tid == ptid_t (1, 0, 2), "tid operator== is right");
static_assert (both == ptid_t (1, 2, 2), "both operator== is right");
/* Verify operator !=. */
static_assert (pid != ptid_t (2, 0, 0), "pid isn't equal to a different pid");
static_assert (pid != lwp, "pid isn't equal to one of its thread");
static_assert (lwp != tid, "lwp isn't equal to tid");
static_assert (both != lwp, "both isn't equal to lwp");
static_assert (both != tid, "both isn't equal to tid");
/* Verify matches against minus_one. */
static_assert (pid.matches (minus_one), "pid matches minus one");
static_assert (lwp.matches (minus_one), "lwp matches minus one");
static_assert (tid.matches (minus_one), "tid matches minus one");
static_assert (both.matches (minus_one), "both matches minus one");
/* Verify matches against pid. */
static_assert (pid.matches (pid), "pid matches pid");
static_assert (lwp.matches (pid), "lwp matches pid");
static_assert (tid.matches (pid), "tid matches pid");
static_assert (both.matches (pid), "both matches pid");
static_assert (!ptid_t (2, 0, 0).matches (pid), "other pid doesn't match pid");
static_assert (!ptid_t (2, 2, 0).matches (pid), "other lwp doesn't match pid");
static_assert (!ptid_t (2, 0, 2).matches (pid), "other tid doesn't match pid");
static_assert (!ptid_t (2, 2, 2).matches (pid), "other both doesn't match pid");
/* Verify matches against exact matches. */
static_assert (!pid.matches (lwp), "pid doesn't match lwp");
static_assert (lwp.matches (lwp), "lwp matches lwp");
static_assert (!tid.matches (lwp), "tid doesn't match lwp");
static_assert (!both.matches (lwp), "both doesn't match lwp");
static_assert (!ptid_t (2, 2, 0).matches (lwp), "other lwp doesn't match lwp");
static_assert (!pid.matches (tid), "pid doesn't match tid");
static_assert (!lwp.matches (tid), "lwp doesn't match tid");
static_assert (tid.matches (tid), "tid matches tid");
static_assert (!both.matches (tid), "both doesn't match tid");
static_assert (!ptid_t (2, 0, 2).matches (tid), "other tid doesn't match tid");
static_assert (!pid.matches (both), "pid doesn't match both");
static_assert (!lwp.matches (both), "lwp doesn't match both");
static_assert (!tid.matches (both), "tid doesn't match both");
static_assert (both.matches (both), "both matches both");
static_assert (!ptid_t (2, 2, 2).matches (both),
"other both doesn't match both");
} /* namespace ptid */
int
ptid_lwp_p (const ptid_t &ptid)
{
return ptid.lwp_p ();
}