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| author | Samuel Thibault <samuel.thibault@ens-lyon.org> | 2020-05-27 23:42:24 +0000 |
|---|---|---|
| committer | Samuel Thibault <samuel.thibault@ens-lyon.org> | 2020-05-28 09:11:12 +0000 |
| commit | f9011787497a276f84ef79ae233992692a626dc7 (patch) | |
| tree | 680f878010797f43048084ad75a59d26628866b6 /hurd/hurdsig.c | |
| parent | 31563b68410ff8e9490c5aafca31ec71b38f87a5 (diff) | |
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hurd: Fix pselect atomicity
In case the signal arrives before the __mach_msg call, we need to catch
between the sigprocmask call and the __mach_msg call. Let's just reuse
the support for sigsuspend to make the signal send a message that
our __mach_msg call will just receive.
* hurd/hurdselect.c (_hurd_select): Add sigport and ss variables. When
sigmask is not NULL, create a sigport port and register as
ss->suspended. Add it to the portset. When we receive a message on it,
set error to EINTR. Clean up sigport and portset appropriately.
* hurd/hurdsig.c (wake_sigsuspend): Note that pselect also uses it.
Diffstat (limited to 'hurd/hurdsig.c')
| -rw-r--r-- | hurd/hurdsig.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/hurd/hurdsig.c b/hurd/hurdsig.c index a2741bb7c8..4d819d9af2 100644 --- a/hurd/hurdsig.c +++ b/hurd/hurdsig.c @@ -564,8 +564,8 @@ abort_all_rpcs (int signo, struct machine_thread_all_state *state, int live) } } -/* Wake up any sigsuspend call that is blocking SS->thread. SS must be - locked. */ +/* Wake up any sigsuspend or pselect call that is blocking SS->thread. SS must + be locked. */ static void wake_sigsuspend (struct hurd_sigstate *ss) { |