diff --git a/deps/lvgl b/deps/lvgl
index 0e091f6..b8b7e29 160000
--- a/deps/lvgl
+++ b/deps/lvgl
@@ -1 +1 @@
-Subproject commit 0e091f644d102c82a265a9401d20e064a80c1359
+Subproject commit b8b7e291564985f34bd232acd836154378bff589
diff --git a/examples/test.lua b/examples/test.lua
new file mode 100644
index 0000000..581e863
--- /dev/null
+++ b/examples/test.lua
@@ -0,0 +1,17 @@
+local function Object(t)
+    local info = debug.getinfo(2, "nS") -- 2 refers to the caller of the function
+    print("Called from: " .. info.short_src .. ", function " .. (info.name or 'unknown'))
+    print("table content:")
+    obj = {table.unpack(t)}
+    for k, v in pairs(t) do
+        print(k, v)
+    end
+    return obj
+end
+
+Object({
+    a = "789",
+    Object({
+        a = "101112",
+    })
+})
diff --git a/simulator/lv_conf.h b/simulator/lv_conf.h
index a8be00c..7280c6b 100644
--- a/simulator/lv_conf.h
+++ b/simulator/lv_conf.h
@@ -210,7 +210,7 @@
     *LV_LOG_LEVEL_ERROR       Only critical issue, when the system may fail
     *LV_LOG_LEVEL_USER        Only logs added by the user
     *LV_LOG_LEVEL_NONE        Do not log anything*/
-    #define LV_LOG_LEVEL LV_LOG_LEVEL_WARN
+    #define LV_LOG_LEVEL LV_LOG_LEVEL_INFO
 
     /*1: Print the log with 'printf';
     *0: User need to register a callback with `lv_log_register_print_cb()`*/
@@ -664,7 +664,9 @@
 
 /* libjpeg-turbo decoder library.
  * Supports complete JPEG specifications and high-performance JPEG decoding. */
+#ifndef LV_USE_LIBJPEG_TURBO
 #define LV_USE_LIBJPEG_TURBO 0
+#endif
 
 /*GIF decoder library*/
 #define LV_USE_GIF 1
diff --git a/simulator/main.c b/simulator/main.c
index 24c3f59..083d01c 100644
--- a/simulator/main.c
+++ b/simulator/main.c
@@ -12,6 +12,7 @@
 #include "widgets/widgets.h"
 
 #include <string.h>
+#include <unistd.h>
 
 #if defined(WIN32) || defined(_WIN32) || defined(_WIN32_) || defined(WIN64) || defined(_WIN64) || defined(_WIN64_)
   #include <direct.h>
diff --git a/src/anim.c b/src/anim.c
index c0240ba..72cca85 100644
--- a/src/anim.c
+++ b/src/anim.c
@@ -94,19 +94,19 @@ static void _lv_anim_set_path(void *obj, lua_State *L)
   }
 
   a->path_cb = lv_anim_path_linear;
-  if (path == NULL || strcmp(path, "linear") == 0) {
+  if (path == NULL || lv_strcmp(path, "linear") == 0) {
     ; /* use default linear path */
-  } else if (strcmp(path, "ease_in") == 0) {
+  } else if (lv_strcmp(path, "ease_in") == 0) {
     a->path_cb = lv_anim_path_ease_in;
-  } else if (strcmp(path, "ease_out") == 0) {
+  } else if (lv_strcmp(path, "ease_out") == 0) {
     a->path_cb = lv_anim_path_ease_out;
-  } else if (strcmp(path, "ease_in_out") == 0) {
+  } else if (lv_strcmp(path, "ease_in_out") == 0) {
     a->path_cb = lv_anim_path_ease_in_out;
-  } else if (strcmp(path, "overshoot") == 0) {
+  } else if (lv_strcmp(path, "overshoot") == 0) {
     a->path_cb = lv_anim_path_overshoot;
-  } else if (strcmp(path, "bounce") == 0) {
+  } else if (lv_strcmp(path, "bounce") == 0) {
     a->path_cb = lv_anim_path_bounce;
-  } else if (strcmp(path, "step") == 0) {
+  } else if (lv_strcmp(path, "step") == 0) {
     a->path_cb = lv_anim_path_step;
   }
 }
diff --git a/src/disp.c b/src/disp.c
index f94f81f..ba68491 100644
--- a/src/disp.c
+++ b/src/disp.c
@@ -113,38 +113,38 @@ static int luavgl_disp_load_scr(lua_State *L)
   const char *str;
   lua_getfield(L, 2, "anim");
   str = lua_tostring(L, -1);
-  if (str == NULL || strcmp(str, "none") == 0) {
+  if (str == NULL || lv_strcmp(str, "none") == 0) {
     ; /* use default */
-  } else if (strcmp(str, "over_left") == 0) {
+  } else if (lv_strcmp(str, "over_left") == 0) {
     anim = LV_SCR_LOAD_ANIM_OVER_LEFT;
-  } else if (strcmp(str, "over_right") == 0) {
+  } else if (lv_strcmp(str, "over_right") == 0) {
     anim = LV_SCR_LOAD_ANIM_OVER_RIGHT;
-  } else if (strcmp(str, "over_top") == 0) {
+  } else if (lv_strcmp(str, "over_top") == 0) {
     anim = LV_SCR_LOAD_ANIM_OVER_TOP;
-  } else if (strcmp(str, "over_botto") == 0) {
+  } else if (lv_strcmp(str, "over_botto") == 0) {
     anim = LV_SCR_LOAD_ANIM_OVER_BOTTOM;
-  } else if (strcmp(str, "move_left") == 0) {
+  } else if (lv_strcmp(str, "move_left") == 0) {
     anim = LV_SCR_LOAD_ANIM_MOVE_LEFT;
-  } else if (strcmp(str, "move_right") == 0) {
+  } else if (lv_strcmp(str, "move_right") == 0) {
     anim = LV_SCR_LOAD_ANIM_MOVE_RIGHT;
-  } else if (strcmp(str, "move_top") == 0) {
+  } else if (lv_strcmp(str, "move_top") == 0) {
     anim = LV_SCR_LOAD_ANIM_MOVE_TOP;
-  } else if (strcmp(str, "move_botto") == 0) {
+  } else if (lv_strcmp(str, "move_botto") == 0) {
     anim = LV_SCR_LOAD_ANIM_MOVE_BOTTOM;
-  } else if (strcmp(str, "fade_on") == 0) {
+  } else if (lv_strcmp(str, "fade_on") == 0) {
     anim = LV_SCR_LOAD_ANIM_FADE_ON;
 #if LV_VERSION_CHECK(8, 3, 0)
-  } else if (strcmp(str, "fade_in") == 0) {
+  } else if (lv_strcmp(str, "fade_in") == 0) {
     anim = LV_SCR_LOAD_ANIM_FADE_IN;
-  } else if (strcmp(str, "fade_out") == 0) {
+  } else if (lv_strcmp(str, "fade_out") == 0) {
     anim = LV_SCR_LOAD_ANIM_FADE_OUT;
-  } else if (strcmp(str, "out_left") == 0) {
+  } else if (lv_strcmp(str, "out_left") == 0) {
     anim = LV_SCR_LOAD_ANIM_OUT_LEFT;
-  } else if (strcmp(str, "out_right") == 0) {
+  } else if (lv_strcmp(str, "out_right") == 0) {
     anim = LV_SCR_LOAD_ANIM_OUT_RIGHT;
-  } else if (strcmp(str, "out_top") == 0) {
+  } else if (lv_strcmp(str, "out_top") == 0) {
     anim = LV_SCR_LOAD_ANIM_OUT_TOP;
-  } else if (strcmp(str, "out_bottom") == 0) {
+  } else if (lv_strcmp(str, "out_bottom") == 0) {
     anim = LV_SCR_LOAD_ANIM_OUT_BOTTOM;
 #endif
   }
diff --git a/src/font.c b/src/font.c
index 369da39..a3d94e9 100644
--- a/src/font.c
+++ b/src/font.c
@@ -161,7 +161,7 @@ static int luavgl_get_named_weight(const char *name)
   }
 
   for (int i = 0; i < _ARRAY_LEN(g_named_weight); i++) {
-    if (strcmp(name, g_named_weight[i].name) == 0) {
+    if (lv_strcmp(name, g_named_weight[i].name) == 0) {
       return g_named_weight[i].value;
     }
   }
@@ -180,7 +180,7 @@ static const lv_font_t *_luavgl_font_create(lua_State *L, const char *name,
                                             int size, int weight)
 {
   /* check builtin font firstly. */
-  if (strcmp(name, "montserrat") == 0) {
+  if (lv_strcmp(name, "montserrat") == 0) {
     if (FONT_WEIGHT_NORMAL != weight)
       return NULL;
 
@@ -189,7 +189,7 @@ static const lv_font_t *_luavgl_font_create(lua_State *L, const char *name,
         return g_builtin_montserrat[i].font;
       }
     }
-  } else if (strcmp(name, "unscii") == 0) {
+  } else if (lv_strcmp(name, "unscii") == 0) {
     if (FONT_WEIGHT_NORMAL != weight)
       return NULL;
 #if LV_FONT_UNSCII_8
@@ -203,14 +203,14 @@ static const lv_font_t *_luavgl_font_create(lua_State *L, const char *name,
 #endif
   }
 #if LV_FONT_DEJAVU_16_PERSIAN_HEBREW
-  else if (strcmp(name, "dejavu_persian_hebrew") == 0) {
+  else if (lv_strcmp(name, "dejavu_persian_hebrew") == 0) {
     if (size == 16)
       return &lv_font_dejavu_16_persian_hebrew;
   }
 #endif
 
 #if LV_FONT_SIMSUN_16_CJK
-  else if (strcmp(name, "dejavu_persian_hebrew") == 0) {
+  else if (lv_strcmp(name, "dejavu_persian_hebrew") == 0) {
     if (size == 16)
       return &lv_font_simsun_16_cjk;
   }
@@ -225,6 +225,17 @@ static const lv_font_t *_luavgl_font_create(lua_State *L, const char *name,
   return NULL;
 }
 
+static char *luavgl_strchr(const char *s, char c)
+{
+  while (*s) {
+    if (c == *s) {
+      return (char *)s;
+    }
+    s++;
+  }
+  return NULL;
+}
+
 /**
  * Dynamic font family fallback is not supported.
  * The fallback only happen when font creation fails and continue to try next
@@ -254,7 +265,7 @@ static int luavgl_font_create(lua_State *L)
       weight = lua_tointeger(L, 3);
     } else {
       char *luastr = (char *)lua_tostring(L, 3);
-      int len = strlen(luastr);
+      int len = lv_strlen(luastr);
       if (len > 128) {
         /* not likely to happen */
         return luaL_argerror(L, 3, "too long");
@@ -271,7 +282,7 @@ static int luavgl_font_create(lua_State *L)
     weight = FONT_WEIGHT_NORMAL;
   }
 
-  str = strdup(lua_tostring(L, 1));
+  str = lv_strdup(lua_tostring(L, 1));
   if (str == NULL) {
     return luaL_error(L, "no memory");
   }
@@ -283,11 +294,11 @@ static int luavgl_font_create(lua_State *L)
       continue;
     }
 
-    char *end = strchr(name, ',');
+    char *end = luavgl_strchr(name, ',');
     if (end != NULL) {
       *end = '\0';
     } else {
-      end = name + strlen(name);
+      end = name + lv_strlen(name);
     }
 
     char *trim = end - 1;
diff --git a/src/fs.c b/src/fs.c
index e95f25c..4deec5e 100644
--- a/src/fs.c
+++ b/src/fs.c
@@ -47,10 +47,10 @@ static int luavgl_fs_open(lua_State *L)
   f->closed = false;
 
   lv_fs_mode_t lmode = 0;
-  if (strchr(mode, 'r'))
+  if (luavgl_strchr(mode, 'r'))
     lmode |= LV_FS_MODE_RD;
 
-  if (strchr(mode, 'w'))
+  if (luavgl_strchr(mode, 'w'))
     lmode |= LV_FS_MODE_WR;
 
   lv_fs_res_t res = lv_fs_open(&f->file, path, lmode);
diff --git a/src/luavgl.c b/src/luavgl.c
index ce11b20..0b2290f 100644
--- a/src/luavgl.c
+++ b/src/luavgl.c
@@ -42,7 +42,7 @@ LUALIB_API luavgl_ctx_t *luavgl_context(lua_State *L)
     /* create it if not exist in registry */
     lua_pushstring(L, luavglgl_key);
     ctx = (luavgl_ctx_t *)lua_newuserdata(L, sizeof(*ctx));
-    memset(ctx, 0, sizeof(*ctx));
+    lv_memset(ctx, 0, sizeof(*ctx));
     lua_rawset(L, LUA_REGISTRYINDEX);
   } else {
     ctx = (luavgl_ctx_t *)lua_touserdata(L, -1);
diff --git a/src/obj.c b/src/obj.c
index 2a25d61..15dddb8 100644
--- a/src/obj.c
+++ b/src/obj.c
@@ -866,7 +866,7 @@ LUALIB_API luavgl_obj_t *luavgl_add_lobj(lua_State *L, lv_obj_t *obj)
 
   lua_setmetatable(L, -2);
 
-  memset(lobj, 0, sizeof(*lobj));
+  lv_memset(lobj, 0, sizeof(*lobj));
   lobj->obj = obj;
 
   /* Init event array to store events added from lua. */
diff --git a/src/private.h b/src/private.h
index 5484e73..51a4625 100644
--- a/src/private.h
+++ b/src/private.h
@@ -6,7 +6,6 @@
 
 #include <stdbool.h>
 #include <stdint.h>
-#include <stdlib.h>
 
 static void dumpstack(lua_State *L);
 static void dumptable(lua_State *L, int index);
diff --git a/src/style.c b/src/style.c
index 7599b8a..95c9f36 100644
--- a/src/style.c
+++ b/src/style.c
@@ -198,27 +198,47 @@ static lv_flex_align_t luavgl_to_flex_align(lua_State *L, int idx)
     return LV_FLEX_ALIGN_START;
 
   const char *str = lua_tostring(L, idx);
-  if (strcmp("flex-start", str) == 0)
+  if (lv_strcmp("flex-start", str) == 0)
     return LV_FLEX_ALIGN_START;
 
-  if (strcmp("flex-end", str) == 0)
+  if (lv_strcmp("flex-end", str) == 0)
     return LV_FLEX_ALIGN_END;
 
-  if (strcmp("center", str) == 0)
+  if (lv_strcmp("center", str) == 0)
     return LV_FLEX_ALIGN_CENTER;
 
-  if (strcmp("space-evenly", str) == 0)
+  if (lv_strcmp("space-evenly", str) == 0)
     return LV_FLEX_ALIGN_SPACE_EVENLY;
 
-  if (strcmp("space-around", str) == 0)
+  if (lv_strcmp("space-around", str) == 0)
     return LV_FLEX_ALIGN_SPACE_AROUND;
 
-  if (strcmp("space-between", str) == 0)
+  if (lv_strcmp("space-between", str) == 0)
     return LV_FLEX_ALIGN_SPACE_BETWEEN;
 
   return LV_FLEX_ALIGN_START;
 }
 
+static char *luavgl_strstr(const char *haystack, const char *needle) {
+    while (*haystack != '\0') {
+        const char *h = haystack;
+        const char *n = needle;
+
+        while (*n != '\0' && *h == *n) {
+            h++;
+            n++;
+        }
+
+        if (*n == '\0') {
+            return (char *)haystack;
+        }
+
+        haystack++;
+    }
+
+    return NULL;
+}
+
 static int luavgl_set_flex_layout_kv(lua_State *L, style_set_cb_t cb,
                                      void *args)
 {
@@ -239,14 +259,14 @@ static int luavgl_set_flex_layout_kv(lua_State *L, style_set_cb_t cb,
   if (lua_type(L, -1) == LUA_TSTRING) {
     str = lua_tostring(L, -1);
     /* starts with  */
-    if (strncmp("row", str, 3) == 0) {
+    if (lv_strcmp("row", str) == 0) {
       flow = LV_FLEX_FLOW_ROW;
-    } else if (strncmp("column", str, 3) == 0) {
+    } else if (lv_strcmp("column", str) == 0) {
       flow = LV_FLEX_FLOW_COLUMN;
     }
 
     /* if reverse presents */
-    if (strstr(str, "-reverse")) {
+    if (luavgl_strstr(str, "-reverse")) {
       flow |= _LV_FLEX_REVERSE;
     }
   }
@@ -259,9 +279,9 @@ static int luavgl_set_flex_layout_kv(lua_State *L, style_set_cb_t cb,
   lua_getfield(L, -1, "flex_wrap");
   if (lua_type(L, -1) == LUA_TSTRING) {
     str = lua_tostring(L, -1);
-    if (strcmp("wrap", str) == 0) {
+    if (lv_strcmp("wrap", str) == 0) {
       flow |= _LV_FLEX_WRAP;
-    } else if (strcmp("wrap-reverse", str) == 0) {
+    } else if (lv_strcmp("wrap-reverse", str) == 0) {
       flow |= _LV_FLEX_WRAP | _LV_FLEX_REVERSE;
     }
     /* else: normal */
@@ -321,7 +341,7 @@ static inline bool luavgl_is_style_inherit(lua_State *L)
 {
   const char *str;
   return (lua_type(L, -1) == LUA_TSTRING) && (str = lua_tostring(L, -1)) &&
-         (strcmp(str, "inherit") == 0);
+         (lv_strcmp(str, "inherit") == 0);
 }
 
 /**
@@ -343,7 +363,7 @@ static int luavgl_set_style_kv(lua_State *L, style_set_cb_t cb, void *args)
   lv_style_value_t value = {0};
   const struct style_map_s *p = NULL;
   for (int i = 0; i < STYLE_MAP_LEN; i++) {
-    if (strcmp(key, g_style_map[i].name) == 0) {
+    if (lv_strcmp(key, g_style_map[i].name) == 0) {
       p = &g_style_map[i];
       break;
     }
@@ -548,7 +568,7 @@ static int luavgl_style_remove_prop(lua_State *L)
 
   for (int i = 0; i < STYLE_MAP_LEN; i++) {
     const struct style_map_s *p = &g_style_map[i];
-    if (strcmp(name, p->name) == 0) {
+    if (lv_strcmp(name, p->name) == 0) {
       lv_style_remove_prop(&s->style, p->prop);
       return 0;
     }
diff --git a/src/util.c b/src/util.c
index 05cdc60..26218e6 100644
--- a/src/util.c
+++ b/src/util.c
@@ -296,7 +296,7 @@ LUALIB_API lv_color_t luavgl_tocolor(lua_State *L, int idx)
       return color;
     }
 
-    int len = strlen(s);
+    int len = lv_strlen(s);
     if (len == 4 && s[0] == '#') {
       /* #RGB */
       int r = to_int(s[1]);
@@ -370,7 +370,7 @@ LUALIB_API int luavgl_set_property_array(lua_State *L, void *obj,
 
   for (int i = 0; i < len; i++) {
     const luavgl_value_setter_t *p = &table[i];
-    if (strcmp(key, p->key))
+    if (lv_strcmp(key, p->key))
       continue;
 
     if (p->type == SETTER_TYPE_INT) {
diff --git a/src/widgets/dropdown.c b/src/widgets/dropdown.c
index d9ccf47..d2bcfc0 100644
--- a/src/widgets/dropdown.c
+++ b/src/widgets/dropdown.c
@@ -72,7 +72,7 @@ static int luavgl_dropdown_get(lua_State *L)
   }
 
   const char *key = lua_tostring(L, 2);
-  if (strcmp(key, "list") == 0) {
+  if (lv_strcmp(key, "list") == 0) {
     lv_obj_t *list = lv_dropdown_get_list(obj);
     lua_pushlightuserdata(L, list);
     lua_rawget(L, LUA_REGISTRYINDEX);
@@ -83,27 +83,27 @@ static int luavgl_dropdown_get(lua_State *L)
     return 1;
   }
 
-  if (strcmp(key, "text") == 0) {
+  if (lv_strcmp(key, "text") == 0) {
     lua_pushstring(L, lv_dropdown_get_text(obj));
     return 1;
   }
 
-  if (strcmp(key, "options") == 0) {
+  if (lv_strcmp(key, "options") == 0) {
     lua_pushstring(L, lv_dropdown_get_options(obj));
     return 1;
   }
 
-  if (strcmp(key, "selected") == 0) {
+  if (lv_strcmp(key, "selected") == 0) {
     lua_pushinteger(L, lv_dropdown_get_selected(obj));
     return 1;
   }
 
-  if (strcmp(key, "option_cnt") == 0) {
+  if (lv_strcmp(key, "option_cnt") == 0) {
     lua_pushinteger(L, lv_dropdown_get_option_cnt(obj));
     return 1;
   }
 
-  if (strcmp(key, "selected_str") == 0) {
+  if (lv_strcmp(key, "selected_str") == 0) {
     char buf[64];
     lv_dropdown_get_selected_str(obj, buf, sizeof(buf));
     lua_pushstring(L, buf);
@@ -111,19 +111,19 @@ static int luavgl_dropdown_get(lua_State *L)
   }
 
 #if LV_VERSION_CHECK(8, 3, 0)
-  if (strcmp(key, "option_index") == 0) {
+  if (lv_strcmp(key, "option_index") == 0) {
     const char *option = lua_tostring(L, 3);
     lua_pushinteger(L, lv_dropdown_get_option_index(obj, option));
     return 1;
   }
 #endif
 
-  if (strcmp(key, "symbol") == 0) {
+  if (lv_strcmp(key, "symbol") == 0) {
     lua_pushlightuserdata(L, (void *)lv_dropdown_get_symbol(obj));
     return 1;
   }
 
-  if (strcmp(key, "dir") == 0) {
+  if (lv_strcmp(key, "dir") == 0) {
     lua_pushinteger(L, lv_dropdown_get_dir(obj));
     return 1;
   }