diff --git a/bsp/simulator/.config b/bsp/simulator/.config
index 3064f55a14..1cbd646211 100644
--- a/bsp/simulator/.config
+++ b/bsp/simulator/.config
@@ -77,7 +77,7 @@ CONFIG_RT_USING_DEVICE=y
 # CONFIG_RT_USING_DM is not set
 # CONFIG_RT_USING_INTERRUPT_INFO is not set
 CONFIG_RT_USING_CONSOLE=y
-CONFIG_RT_CONSOLEBUF_SIZE=128
+CONFIG_RT_CONSOLEBUF_SIZE=256
 CONFIG_RT_CONSOLE_DEVICE_NAME="console"
 CONFIG_RT_VER_NUM=0x50001
 # CONFIG_RT_USING_STDC_ATOMIC is not set
diff --git a/bsp/simulator/gcc_elf64.ld b/bsp/simulator/gcc_elf64.ld
index 26adaa86af..ad1ecac006 100644
--- a/bsp/simulator/gcc_elf64.ld
+++ b/bsp/simulator/gcc_elf64.ld
@@ -66,6 +66,12 @@ SECTIONS
 
   /* setction information for finsh shell begin */
   . = ALIGN(8);
+  UtestTcTab : {
+    __rt_utest_tc_tab_start = .;
+    KEEP(*(UtestTcTab))
+    __rt_utest_tc_tab_end = .;
+  }
+  . = ALIGN(8);
   FSymTab : {
       __fsymtab_start = .;
       KEEP(*(FSymTab))
diff --git a/bsp/simulator/rtconfig.h b/bsp/simulator/rtconfig.h
index a2b2cd15f9..034a402a5c 100755
--- a/bsp/simulator/rtconfig.h
+++ b/bsp/simulator/rtconfig.h
@@ -42,7 +42,7 @@
 
 #define RT_USING_DEVICE
 #define RT_USING_CONSOLE
-#define RT_CONSOLEBUF_SIZE 128
+#define RT_CONSOLEBUF_SIZE 256
 #define RT_CONSOLE_DEVICE_NAME "console"
 #define RT_VER_NUM 0x50001
 
diff --git a/components/utilities/utest/utest.c b/components/utilities/utest/utest.c
index 3c91fa8166..6b480dd1e1 100644
--- a/components/utilities/utest/utest.c
+++ b/components/utilities/utest/utest.c
@@ -88,19 +88,19 @@ int utest_init(void)
 #elif defined (__ICCARM__) || defined(__ICCRX__)    /* for IAR Compiler */
     tc_table = (utest_tc_export_t)__section_begin("UtestTcTab");
     tc_num = (utest_tc_export_t)__section_end("UtestTcTab") - tc_table;
-#elif defined (__GNUC__)                            /* for GCC Compiler */
+#else
+    unsigned int *ptr_begin, *ptr_end;
+#if defined(__GNUC__)
     extern const int __rt_utest_tc_tab_start;
     extern const int __rt_utest_tc_tab_end;
-    tc_table = (utest_tc_export_t)&__rt_utest_tc_tab_start;
-    tc_num = (utest_tc_export_t) &__rt_utest_tc_tab_end - tc_table;
+    ptr_begin = (unsigned int *)&__rt_utest_tc_tab_start;
+    ptr_end = (unsigned int *)&__rt_utest_tc_tab_end;
 #elif defined(_MSC_VER)
-    unsigned int* ptr_begin, * ptr_end;
-
-    ptr_begin = (unsigned int*)&__tc_export_begin;
+    ptr_begin = (unsigned int *)&__tc_export_begin;
+    ptr_end = (unsigned int *)&__tc_export_end;
     ptr_begin += (sizeof(struct utest_tc_export) / sizeof(unsigned int));
+#endif
     while (*ptr_begin == 0) ptr_begin++;
-
-    ptr_end = (unsigned int*)&__tc_export_end;
     ptr_end--;
     while (*ptr_end == 0) ptr_end--;
     /* copy tc_table from rodata section to ram */
diff --git a/src/kservice.c b/src/kservice.c
index 4f44183707..dddcdf6df3 100644
--- a/src/kservice.c
+++ b/src/kservice.c
@@ -1574,8 +1574,13 @@ rt_inline void _heap_unlock(rt_base_t level)
 
 #ifdef RT_USING_UTESTCASES
 /* export to utest to observe the inner statements */
+#ifdef _MSC_VER
+#define rt_heap_lock() _heap_lock()
+#define rt_heap_unlock() _heap_unlock()
+#else
 rt_base_t rt_heap_lock(void) __attribute__((alias("_heap_lock")));
 void rt_heap_unlock(rt_base_t level) __attribute__((alias("_heap_unlock")));
+#endif /* _MSC_VER */
 #endif
 
 #if defined(RT_USING_SMALL_MEM_AS_HEAP)