[threading] Fix signal registration on posix.

diff --git a/mono/utils/mono-threads-posix.c b/mono/utils/mono-threads-posix.c
index dcb296fdbe9332c94a372808aa4e9e4a2c06e17f..7a3b977a539ebf10eb9df9bc6f1fec953b9f65f8 100644 (file)
--- a/mono/utils/mono-threads-posix.c
+++ b/mono/utils/mono-threads-posix.c
@@ -272,6 +272,7 @@ mono_threads_core_clear_interruption (void)
 int
 mono_threads_pthread_kill (MonoThreadInfo *info, int signum)
 {
+       THREADS_SUSPEND_DEBUG ("sending signal %d to %p[%p]\n", signum, info, mono_thread_info_get_tid (info));
 #ifdef USE_TKILL_ON_ANDROID
        int result, old_errno = errno;
        result = tkill (info->native_handle, signum);
@@ -312,16 +313,12 @@ mono_thread_search_alt_signal (int min_signal)
 #if !defined (SIGRTMIN)
        g_error ("signal search only works with RTMIN");
 #else
-       static int abort_signum = -1;
        int i;
-       if (abort_signum != -1)
-               return abort_signum;
        /* we try to avoid SIGRTMIN and any one that might have been set already, see bug #75387 */
        for (i = MAX (min_signal, SIGRTMIN) + 1; i < SIGRTMAX; ++i) {
                struct sigaction sinfo;
                sigaction (i, NULL, &sinfo);
                if (sinfo.sa_handler == SIG_DFL && (void*)sinfo.sa_sigaction == (void*)SIG_DFL) {
-                       abort_signum = i;
                        return i;
                }
        }
@@ -362,7 +359,7 @@ mono_thread_get_alt_resume_signal (void)
 #else
        static int resume_signum = -1;
        if (resume_signum == -1)
-               resume_signum = mono_thread_search_alt_signal (mono_thread_get_alt_suspend_signal ());
+               resume_signum = mono_thread_search_alt_signal (mono_thread_get_alt_suspend_signal () + 1);
        return resume_signum;
 #endif /* SIGRTMIN */
 }