# lv_assert.h (/api/public/debugging/lv_assert_h)
Macros [#macros]
LV_ASSERT_HANDLER [#lv_assert_handler]
```c title=" " lineNumbers=1
#define LV_ASSERT_HANDLER while(1); /*halt by default*/
```
LV_ASSERT_INTERNAL [#lv_assert_internal]
```c title=" " lineNumbers=1
#define LV_ASSERT_INTERNAL(expr, msg) \
do { \
if(!(expr)) { \
LV_LOG_ERROR("Assertion `%s` failed." msg, #expr); \
LV_ASSERT_HANDLER \
} \
} while(0)
```
LV_ASSERT_FORMAT_INTERNAL [#lv_assert_format_internal]
```c title=" " lineNumbers=1
#define LV_ASSERT_FORMAT_INTERNAL(expr, format, ...) \
do { \
if(!(expr)) { \
LV_LOG_ERROR("Assertion `%s` failed." format, #expr, __VA_ARGS__); \
LV_ASSERT_HANDLER \
} \
} while(0)
```
LV_ASSERT [#lv_assert]
```c title=" " lineNumbers=1
#define LV_ASSERT(expr)
```
LV_ASSERT_MSG [#lv_assert_msg]
```c title=" " lineNumbers=1
#define LV_ASSERT_MSG(expr, msg)
```
LV_ASSERT_FORMAT_MSG [#lv_assert_format_msg]
```c title=" " lineNumbers=1
#define LV_ASSERT_FORMAT_MSG(expr, format, ...)
```
LV_ASSERT_NULL [#lv_assert_null]
```c title=" " lineNumbers=1
#define LV_ASSERT_NULL(p) \
LV_ASSERT_INTERNAL(p != NULL, " NULL pointer");
```
LV_ASSERT_MALLOC [#lv_assert_malloc]
```c title=" " lineNumbers=1
#define LV_ASSERT_MALLOC(p) \
LV_ASSERT_INTERNAL(p != NULL, " Out of memory");
```
LV_ASSERT_MEM_INTEGRITY [#lv_assert_mem_integrity]
```c title=" " lineNumbers=1
#define LV_ASSERT_MEM_INTEGRITY() \
LV_ASSERT_INTERNAL(lv_mem_test() == LV_RESULT_OK, " Memory integrity error");
```
Dependencies [#dependencies]