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-rw-r--r--erts/emulator/beam/break.c2
-rw-r--r--erts/emulator/beam/erl_init.c1
-rw-r--r--erts/emulator/beam/sys.h3
-rw-r--r--erts/emulator/sys/unix/sys.c3
4 files changed, 6 insertions, 3 deletions
diff --git a/erts/emulator/beam/break.c b/erts/emulator/beam/break.c
index 6e1e94b95b..2fc61ab436 100644
--- a/erts/emulator/beam/break.c
+++ b/erts/emulator/beam/break.c
@@ -717,6 +717,8 @@ erl_crash_dump_v(char *file, int line, char* fmt, va_list args)
* We have to be very very careful when doing this as the schedulers
* could be anywhere.
*/
+ sys_init_suspend_handler();
+
for (i = 0; i < erts_no_schedulers; i++) {
erts_tid_t tid = ERTS_SCHEDULER_IX(i)->tid;
if (!erts_equal_tids(tid,erts_thr_self()))
diff --git a/erts/emulator/beam/erl_init.c b/erts/emulator/beam/erl_init.c
index c5904b375e..88bd002a8c 100644
--- a/erts/emulator/beam/erl_init.c
+++ b/erts/emulator/beam/erl_init.c
@@ -2220,7 +2220,6 @@ erl_start(int argc, char **argv)
init_break_handler();
if (replace_intr)
erts_replace_intr();
- sys_init_suspend_handler();
#endif
boot_argc = argc - i; /* Number of arguments to init */
diff --git a/erts/emulator/beam/sys.h b/erts/emulator/beam/sys.h
index ceea794cc4..a11fb16b39 100644
--- a/erts/emulator/beam/sys.h
+++ b/erts/emulator/beam/sys.h
@@ -851,9 +851,12 @@ int erts_sys_unsetenv(char *key);
char *erts_read_env(char *key);
void erts_free_read_env(void *value);
+#if defined(ERTS_SMP)
#if defined(ERTS_THR_HAVE_SIG_FUNCS) && !defined(ETHR_UNUSABLE_SIGUSRX)
extern void sys_thr_resume(erts_tid_t tid);
extern void sys_thr_suspend(erts_tid_t tid);
+#define ERTS_SYS_SUSPEND_SIGNAL SIGUSR2
+#endif
#endif
/* utils.c */
diff --git a/erts/emulator/sys/unix/sys.c b/erts/emulator/sys/unix/sys.c
index ce87e3c7a6..a25d865c91 100644
--- a/erts/emulator/sys/unix/sys.c
+++ b/erts/emulator/sys/unix/sys.c
@@ -110,9 +110,8 @@ erts_smp_atomic_t sys_misc_mem_sz;
static void smp_sig_notify(int signum);
static int sig_notify_fds[2] = {-1, -1};
-#if !defined(ETHR_UNUSABLE_SIGUSRX) && defined(ERTS_THR_HAVE_SIG_FUNCS)
+#ifdef ERTS_SYS_SUSPEND_SIGNAL
static int sig_suspend_fds[2] = {-1, -1};
-#define ERTS_SYS_SUSPEND_SIGNAL SIGUSR2
#endif
#endif