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-rw-r--r--erts/emulator/sys/unix/erl_unix_sys.h1
-rw-r--r--erts/emulator/sys/unix/sys.c24
2 files changed, 17 insertions, 8 deletions
diff --git a/erts/emulator/sys/unix/erl_unix_sys.h b/erts/emulator/sys/unix/erl_unix_sys.h
index 8d4e98bf3a..b55180c509 100644
--- a/erts/emulator/sys/unix/erl_unix_sys.h
+++ b/erts/emulator/sys/unix/erl_unix_sys.h
@@ -311,6 +311,7 @@ extern SIGFUNC sys_signal(int, SIGFUNC);
extern void sys_sigrelease(int);
extern void sys_sigblock(int);
extern void sys_stop_cat(void);
+extern void sys_init_suspend_handler(void);
/*
* Handling of floating point exceptions.
diff --git a/erts/emulator/sys/unix/sys.c b/erts/emulator/sys/unix/sys.c
index 8d7da3e47e..a57b69aa89 100644
--- a/erts/emulator/sys/unix/sys.c
+++ b/erts/emulator/sys/unix/sys.c
@@ -226,8 +226,10 @@ static erts_smp_atomic_t sys_misc_mem_sz;
static void smp_sig_notify(char c);
static int sig_notify_fds[2] = {-1, -1};
+#if !defined(ETHR_UNUSABLE_SIGUSRX) && defined(ERTS_THR_HAVE_SIG_FUNCS)
static int sig_suspend_fds[2] = {-1, -1};
#define ERTS_SYS_SUSPEND_SIGNAL SIGUSR2
+#endif
#endif
@@ -872,7 +874,7 @@ sigusr1_exit(void)
#else
-#ifdef ERTS_SMP
+#ifdef ERTS_SYS_SUSPEND_SIGNAL
void
sys_thr_suspend(erts_tid_t tid) {
erts_thr_kill(tid, ERTS_SYS_SUSPEND_SIGNAL);
@@ -900,7 +902,7 @@ static RETSIGTYPE user_signal1(int signum)
#endif
}
-#ifdef ERTS_SMP
+#ifdef ERTS_SYS_SUSPEND_SIGNAL
#if (defined(SIG_SIGSET) || defined(SIG_SIGNAL))
static RETSIGTYPE suspend_signal(void)
#else
@@ -913,7 +915,7 @@ static RETSIGTYPE suspend_signal(int signum)
res = read(sig_suspend_fds[0], buf, sizeof(int));
} while (res < 0 && errno == EINTR);
}
-#endif /* #ifdef ERTS_SMP */
+#endif /* #ifdef ERTS_SYS_SUSPEND_SIGNAL */
#endif /* #ifndef ETHR_UNUSABLE_SIGUSRX */
@@ -966,13 +968,17 @@ void init_break_handler(void)
sys_signal(SIGINT, request_break);
#ifndef ETHR_UNUSABLE_SIGUSRX
sys_signal(SIGUSR1, user_signal1);
-#ifdef ERTS_SMP
- sys_signal(ERTS_SYS_SUSPEND_SIGNAL, suspend_signal);
-#endif /* #ifdef ERTS_SMP */
#endif /* #ifndef ETHR_UNUSABLE_SIGUSRX */
sys_signal(SIGQUIT, do_quit);
}
+void sys_init_suspend_handler(void)
+{
+#ifdef ERTS_SYS_SUSPEND_SIGNAL
+ sys_signal(ERTS_SYS_SUSPEND_SIGNAL, suspend_signal);
+#endif
+}
+
int sys_max_files(void)
{
return(max_files);
@@ -990,7 +996,7 @@ static void block_signals(void)
#endif /* #ifndef ETHR_UNUSABLE_SIGUSRX */
#endif /* #ifndef ERTS_SMP */
-#if defined(ERTS_SMP) && !defined(ETHR_UNUSABLE_SIGUSRX)
+#ifdef ERTS_SYS_SUSPEND_SIGNAL
sys_sigblock(ERTS_SYS_SUSPEND_SIGNAL);
#endif
@@ -1009,7 +1015,7 @@ static void unblock_signals(void)
#endif /* #ifndef ETHR_UNUSABLE_SIGUSRX */
#endif /* #ifndef ERTS_SMP */
-#if defined(ERTS_SMP) && !defined(ETHR_UNUSABLE_SIGUSRX)
+#ifdef ERTS_SYS_SUSPEND_SIGNAL
sys_sigrelease(ERTS_SYS_SUSPEND_SIGNAL);
#endif
@@ -3248,12 +3254,14 @@ init_smp_sig_notify(void)
static void
init_smp_sig_suspend(void) {
+#ifdef ERTS_SYS_SUSPEND_SIGNAL
if (pipe(sig_suspend_fds) < 0) {
erl_exit(ERTS_ABORT_EXIT,
"Failed to create sig_suspend pipe: %s (%d)\n",
erl_errno_id(errno),
errno);
}
+#endif
}
#ifdef __DARWIN__