diff options
Diffstat (limited to 'gdb/gdbserver')
| -rw-r--r-- | gdb/gdbserver/ChangeLog | 6 | ||||
| -rw-r--r-- | gdb/gdbserver/linux-low.c | 68 |
2 files changed, 48 insertions, 26 deletions
diff --git a/gdb/gdbserver/ChangeLog b/gdb/gdbserver/ChangeLog index cd5aa0f..e6b0a84 100644 --- a/gdb/gdbserver/ChangeLog +++ b/gdb/gdbserver/ChangeLog @@ -1,3 +1,9 @@ +2014-07-11 Pedro Alves <palves@redhat.com> + + * linux-low.c (kill_wait_lwp): New function, based on + kill_one_lwp_callback, but use my_waitpid directly. + (kill_one_lwp_callback, linux_kill): Use it. + 2014-06-23 Pedro Alves <palves@redhat.com> * linux-x86-low.c (x86_linux_prepare_to_resume): Clear DR_CONTROL diff --git a/gdb/gdbserver/linux-low.c b/gdb/gdbserver/linux-low.c index 61552f4..215a80c 100644 --- a/gdb/gdbserver/linux-low.c +++ b/gdb/gdbserver/linux-low.c @@ -909,6 +909,46 @@ linux_kill_one_lwp (struct lwp_info *lwp) errno ? strerror (errno) : "OK"); } +/* Kill LWP and wait for it to die. */ + +static void +kill_wait_lwp (struct lwp_info *lwp) +{ + struct thread_info *thr = get_lwp_thread (lwp); + int pid = ptid_get_pid (ptid_of (thr)); + int lwpid = ptid_get_lwp (ptid_of (thr)); + int wstat; + int res; + + if (debug_threads) + debug_printf ("kwl: killing lwp %d, for pid: %d\n", lwpid, pid); + + do + { + linux_kill_one_lwp (lwp); + + /* Make sure it died. Notes: + + - The loop is most likely unnecessary. + + - We don't use linux_wait_for_event as that could delete lwps + while we're iterating over them. We're not interested in + any pending status at this point, only in making sure all + wait status on the kernel side are collected until the + process is reaped. + + - We don't use __WALL here as the __WALL emulation relies on + SIGCHLD, and killing a stopped process doesn't generate + one, nor an exit status. + */ + res = my_waitpid (lwpid, &wstat, 0); + if (res == -1 && errno == ECHILD) + res = my_waitpid (lwpid, &wstat, __WCLONE); + } while (res > 0 && WIFSTOPPED (wstat)); + + gdb_assert (res > 0); +} + /* Callback for `find_inferior'. Kills an lwp of a given process, except the leader. */ @@ -917,7 +957,6 @@ kill_one_lwp_callback (struct inferior_list_entry *entry, void *args) { struct thread_info *thread = (struct thread_info *) entry; struct lwp_info *lwp = get_thread_lwp (thread); - int wstat; int pid = * (int *) args; if (ptid_get_pid (entry->id) != pid) @@ -936,14 +975,7 @@ kill_one_lwp_callback (struct inferior_list_entry *entry, void *args) return 0; } - do - { - linux_kill_one_lwp (lwp); - - /* Make sure it died. The loop is most likely unnecessary. */ - pid = linux_wait_for_event (thread->entry.id, &wstat, __WALL); - } while (pid > 0 && WIFSTOPPED (wstat)); - + kill_wait_lwp (lwp); return 0; } @@ -952,8 +984,6 @@ linux_kill (int pid) { struct process_info *process; struct lwp_info *lwp; - int wstat; - int lwpid; process = find_process_pid (pid); if (process == NULL) @@ -976,21 +1006,7 @@ linux_kill (int pid) pid); } else - { - struct thread_info *thr = get_lwp_thread (lwp); - - if (debug_threads) - debug_printf ("lk_1: killing lwp %ld, for pid: %d\n", - lwpid_of (thr), pid); - - do - { - linux_kill_one_lwp (lwp); - - /* Make sure it died. The loop is most likely unnecessary. */ - lwpid = linux_wait_for_event (thr->entry.id, &wstat, __WALL); - } while (lwpid > 0 && WIFSTOPPED (wstat)); - } + kill_wait_lwp (lwp); the_target->mourn (process); |