feature: added new dtrace static probe http-lua-user-thread-wait.

dtrace/ngx_lua_provider.d

@@ -47,6 +47,9 @@ provider nginx_lua {
 
     probe http__lua__coroutine__done(ngx_http_request_t *r, void *co,
             int success);
+
+    /* lua_State *parent, lua_State *child */
+    probe http__lua__user__thread__wait(void *parent, void *child);
 };
 
 

src/ngx_http_lua_probe.h

@@ -59,6 +59,9 @@
 #define ngx_http_lua_probe_coroutine_done(r, co, success)                    \
     NGINX_LUA_HTTP_LUA_COROUTINE_DONE(r, co, success)
 
+#define ngx_http_lua_probe_user_thread_wait(parent, child)                   \
+    NGINX_LUA_HTTP_LUA_USER_THREAD_WAIT(parent, child)
+
 #else /* !(NGX_DTRACE) */
 
 #define ngx_http_lua_probe_info(s)
@@ -75,6 +78,7 @@
 #define ngx_http_lua_probe_thread_delete(r, thread, ctx)
 #define ngx_http_lua_probe_run_posted_thread(r, thread, status)
 #define ngx_http_lua_probe_coroutine_done(r, co, success)
+#define ngx_http_lua_probe_user_thread_wait(parent, child)
 
 #endif
 

src/ngx_http_lua_uthread.c

@@ -175,6 +175,7 @@ ngx_http_lua_uthread_wait(lua_State *L)
             break;
         }
 
+        ngx_http_lua_probe_user_thread_wait(L, sub_coctx->co);
         sub_coctx->waited_by_parent = 1;
     }