diff options
Diffstat (limited to 'gdb/linux-nat.c')
| -rw-r--r-- | gdb/linux-nat.c | 144 |
1 files changed, 0 insertions, 144 deletions
diff --git a/gdb/linux-nat.c b/gdb/linux-nat.c index 9bc1324..95192f6 100644 --- a/gdb/linux-nat.c +++ b/gdb/linux-nat.c @@ -345,17 +345,6 @@ add_to_pid_list (struct simple_pid_list **listp, int pid, int status) } static int -in_pid_list_p (struct simple_pid_list *list, int pid) -{ - struct simple_pid_list *p; - - for (p = list; p != NULL; p = p->next) - if (p->pid == pid) - return 1; - return 0; -} - -static int pull_pid_from_list (struct simple_pid_list **listp, int pid, int *statusp) { struct simple_pid_list **p; @@ -1044,139 +1033,6 @@ linux_nat_post_attach_wait (ptid_t ptid, int first, int *cloned, return status; } -/* Attach to the LWP specified by PID. Return 0 if successful, -1 if - the new LWP could not be attached, or 1 if we're already auto - attached to this thread, but haven't processed the - PTRACE_EVENT_CLONE event of its parent thread, so we just ignore - its existance, without considering it an error. */ - -int -lin_lwp_attach_lwp (ptid_t ptid) -{ - struct lwp_info *lp; - int lwpid; - - gdb_assert (ptid_lwp_p (ptid)); - - lp = find_lwp_pid (ptid); - lwpid = ptid_get_lwp (ptid); - - /* We assume that we're already attached to any LWP that is already - in our list of LWPs. If we're not seeing exit events from threads - and we've had PID wraparound since we last tried to stop all threads, - this assumption might be wrong; fortunately, this is very unlikely - to happen. */ - if (lp == NULL) - { - int status, cloned = 0, signalled = 0; - - if (ptrace (PTRACE_ATTACH, lwpid, 0, 0) < 0) - { - if (linux_supports_tracefork ()) - { - /* If we haven't stopped all threads when we get here, - we may have seen a thread listed in thread_db's list, - but not processed the PTRACE_EVENT_CLONE yet. If - that's the case, ignore this new thread, and let - normal event handling discover it later. */ - if (in_pid_list_p (stopped_pids, lwpid)) - { - /* We've already seen this thread stop, but we - haven't seen the PTRACE_EVENT_CLONE extended - event yet. */ - if (debug_linux_nat) - fprintf_unfiltered (gdb_stdlog, - "LLAL: attach failed, but already seen " - "this thread %s stop\n", - target_pid_to_str (ptid)); - return 1; - } - else - { - int new_pid; - int status; - - if (debug_linux_nat) - fprintf_unfiltered (gdb_stdlog, - "LLAL: attach failed, and haven't seen " - "this thread %s stop yet\n", - target_pid_to_str (ptid)); - - /* We may or may not be attached to the LWP already. - Try waitpid on it. If that errors, we're not - attached to the LWP yet. Otherwise, we're - already attached. */ - gdb_assert (lwpid > 0); - new_pid = my_waitpid (lwpid, &status, WNOHANG); - if (new_pid == -1 && errno == ECHILD) - new_pid = my_waitpid (lwpid, &status, __WCLONE | WNOHANG); - if (new_pid != -1) - { - if (new_pid == 0) - { - /* The child hasn't stopped for its initial - SIGSTOP stop yet. */ - if (debug_linux_nat) - fprintf_unfiltered (gdb_stdlog, - "LLAL: child hasn't " - "stopped yet\n"); - } - else if (WIFSTOPPED (status)) - { - if (debug_linux_nat) - fprintf_unfiltered (gdb_stdlog, - "LLAL: adding to stopped_pids\n"); - add_to_pid_list (&stopped_pids, lwpid, status); - } - return 1; - } - } - } - - /* If we fail to attach to the thread, issue a warning, - but continue. One way this can happen is if thread - creation is interrupted; as of Linux kernel 2.6.19, a - bug may place threads in the thread list and then fail - to create them. */ - warning (_("Can't attach %s: %s"), target_pid_to_str (ptid), - safe_strerror (errno)); - return -1; - } - - if (debug_linux_nat) - fprintf_unfiltered (gdb_stdlog, - "LLAL: PTRACE_ATTACH %s, 0, 0 (OK)\n", - target_pid_to_str (ptid)); - - status = linux_nat_post_attach_wait (ptid, 0, &cloned, &signalled); - if (!WIFSTOPPED (status)) - return 1; - - lp = add_lwp (ptid); - lp->stopped = 1; - lp->last_resume_kind = resume_stop; - lp->cloned = cloned; - lp->signalled = signalled; - if (WSTOPSIG (status) != SIGSTOP) - { - lp->resumed = 1; - lp->status = status; - } - - target_post_attach (ptid_get_lwp (lp->ptid)); - - if (debug_linux_nat) - { - fprintf_unfiltered (gdb_stdlog, - "LLAL: waitpid %s received %s\n", - target_pid_to_str (ptid), - status_to_str (status)); - } - } - - return 0; -} - static void linux_nat_create_inferior (struct target_ops *ops, char *exec_file, char *allargs, char **env, |