/* Low-level child interface to ptrace.
- Copyright (C) 1988-2021 Free Software Foundation, Inc.
+ Copyright (C) 1988-2023 Free Software Foundation, Inc.
This file is part of GDB.
#endif
}
+/* The event pipe registered as a waitable file in the event loop. */
+event_pipe inf_ptrace_target::m_event_pipe;
+
inf_ptrace_target::~inf_ptrace_target ()
{}
/* On some targets, there must be some explicit actions taken after
the inferior has been started up. */
- target_post_startup_inferior (ptid);
+ post_startup_inferior (ptid);
}
/* Clean up a rotting corpse of an inferior after it died. */
unpusher.reset (this);
}
- if (from_tty)
- {
- const char *exec_file = get_exec_file (0);
-
- if (exec_file)
- printf_unfiltered (_("Attaching to program: %s, %s\n"), exec_file,
- target_pid_to_str (ptid_t (pid)).c_str ());
- else
- printf_unfiltered (_("Attaching to %s\n"),
- target_pid_to_str (ptid_t (pid)).c_str ());
- }
+ target_announce_attach (from_tty, pid);
#ifdef PT_ATTACH
errno = 0;
#endif
inferior_appeared (inf, pid);
- inf->attach_flag = 1;
+ inf->attach_flag = true;
/* Always add a main thread. If some target extends the ptrace
target, it should decorate the ptid later with more info. */
ptid_t
inf_ptrace_target::wait (ptid_t ptid, struct target_waitstatus *ourstatus,
- target_wait_flags options)
+ target_wait_flags target_options)
{
pid_t pid;
- int status, save_errno;
+ int options, status, save_errno;
+
+ options = 0;
+ if (target_options & TARGET_WNOHANG)
+ options |= WNOHANG;
do
{
do
{
- pid = waitpid (ptid.pid (), &status, 0);
+ pid = waitpid (ptid.pid (), &status, options);
save_errno = errno;
}
while (pid == -1 && errno == EINTR);
clear_sigint_trap ();
+ if (pid == 0)
+ {
+ gdb_assert (target_options & TARGET_WNOHANG);
+ ourstatus->set_ignore ();
+ return minus_one_ptid;
+ }
+
if (pid == -1)
{
- fprintf_unfiltered (gdb_stderr,
- _("Child process unexpectedly missing: %s.\n"),
- safe_strerror (save_errno));
+ /* In async mode the SIGCHLD might have raced and triggered
+ a check for an event that had already been reported. If
+ the event was the exit of the only remaining child,
+ waitpid() will fail with ECHILD. */
+ if (ptid == minus_one_ptid && save_errno == ECHILD)
+ {
+ ourstatus->set_no_resumed ();
+ return minus_one_ptid;
+ }
+
+ gdb_printf (gdb_stderr,
+ _("Child process unexpectedly missing: %s.\n"),
+ safe_strerror (save_errno));
- /* Claim it exited with unknown signal. */
- ourstatus->set_signalled (GDB_SIGNAL_UNKNOWN);
- return inferior_ptid;
+ ourstatus->set_ignore ();
+ return minus_one_ptid;
}
/* Ignore terminated detached child processes. */
{
struct inferior *inf = current_inferior ();
- printf_filtered (_("\tUsing the running image of %s %s.\n"),
- inf->attach_flag ? "attached" : "child",
- target_pid_to_str (inferior_ptid).c_str ());
+ gdb_printf (_("\tUsing the running image of %s %s.\n"),
+ inf->attach_flag ? "attached" : "child",
+ target_pid_to_str (ptid_t (inf->pid)).c_str ());
}
std::string
{
return normal_pid_to_str (ptid);
}
+
+/* Implement the "close" target method. */
+
+void
+inf_ptrace_target::close ()
+{
+ /* Unregister from the event loop. */
+ if (is_async_p ())
+ async (false);
+
+ inf_child_target::close ();
+}