add watchdog thread to detect lockups

diff --git a/frontend/main.c b/frontend/main.c
index 5f8fd5c..cb37bd7 100644 (file)
--- a/frontend/main.c
+++ b/frontend/main.c
@@ -16,6 +16,7 @@
 
 #include "main.h"
 #include "plugin.h"
+#include "plugin_lib.h"
 #include "pcnt.h"
 #include "menu.h"
 #include "../libpcsxcore/misc.h"
@@ -243,6 +244,8 @@ int main(int argc, char *argv[])
        else
                menu_loop();
 
+       pl_start_watchdog();
+
        while (1)
        {
                psxCpu->Execute();

diff --git a/frontend/plugin_lib.c b/frontend/plugin_lib.c
index b4f26f6..287b551 100644 (file)
--- a/frontend/plugin_lib.c
+++ b/frontend/plugin_lib.c
@@ -14,6 +14,7 @@
 #include <sys/stat.h>
 #include <fcntl.h>
 #include <unistd.h>
+#include <pthread.h>
 
 #include "plugin_lib.h"
 #include "linux/fbdev.h"
@@ -146,6 +147,7 @@ static void update_input(void)
 void pl_frame_limit(void)
 {
        static struct timeval tv_old, tv_expect;
+       static int vsync_cnt_prev;
        struct timeval now;
        int diff;
 
@@ -162,9 +164,10 @@ void pl_frame_limit(void)
                diff = tvdiff(now, tv_old);
                vsps_cur = 0.0f;
                if (0 < diff && diff < 2000000)
-                       vsps_cur = 1000000.0f * vsync_cnt / diff;
+                       vsps_cur = 1000000.0f * (vsync_cnt - vsync_cnt_prev) / diff;
+               vsync_cnt_prev = vsync_cnt;
                flips_per_sec = flip_cnt;
-               vsync_cnt = flip_cnt = 0;
+               flip_cnt = 0;
                tv_old = now;
                if (g_opts & OPT_SHOWCPU)
                        tick_per_sec = get_cpu_ticks();
@@ -249,3 +252,53 @@ const struct rearmed_cbs pl_rearmed_cbs = {
        &UseFrameSkip,
 };
 
+/* watchdog */
+static void *watchdog_thread(void *unused)
+{
+       int vsync_cnt_old = 0;
+       int seen_dead = 0;
+       int sleep_time = 5;
+
+       while (1)
+       {
+               sleep(sleep_time);
+
+               if (stop) {
+                       seen_dead = 0;
+                       sleep_time = 5;
+                       continue;
+               }
+               if (vsync_cnt != vsync_cnt_old) {
+                       vsync_cnt_old = vsync_cnt;
+                       seen_dead = 0;
+                       sleep_time = 2;
+                       continue;
+               }
+
+               seen_dead++;
+               sleep_time = 1;
+               if (seen_dead > 1)
+                       fprintf(stderr, "watchdog: seen_dead %d\n", seen_dead);
+               if (seen_dead > 4) {
+                       fprintf(stderr, "watchdog: lockup detected, aborting\n");
+                       // we can't do any cleanup here really, the main thread is
+                       // likely touching resources and would crash anyway
+                       abort();
+               }
+       }
+}
+
+void pl_start_watchdog(void)
+{
+       pthread_attr_t attr;
+       pthread_t tid;
+       int ret;
+       
+       pthread_attr_init(&attr);
+       pthread_attr_setdetachstate(&attr, PTHREAD_CREATE_DETACHED);
+
+       ret = pthread_create(&tid, &attr, watchdog_thread, NULL);
+       if (ret != 0)
+               fprintf(stderr, "could not start watchdog: %d\n", ret);
+}
+

diff --git a/frontend/plugin_lib.h b/frontend/plugin_lib.h
index 22ab285..6b01cea 100644 (file)
--- a/frontend/plugin_lib.h
+++ b/frontend/plugin_lib.h
@@ -27,6 +27,7 @@ void *pl_fbdev_flip(void);
 void  pl_fbdev_close(void);
 
 void pl_text_out16(int x, int y, const char *texto, ...);
+void pl_start_watchdog(void);
 
 struct rearmed_cbs {
        void  (*pl_get_layer_pos)(int *x, int *y, int *w, int *h);