ztest: Add validation of zassert strings

Add __printf_like attribute to ztest assertion functions
zassert, zassume, zexpect to validate format strings and arguments
at compile time.

Signed-off-by: Tim Pambor <[email protected]>

Author: tpambor

subsys/testsuite/ztest/include/zephyr/ztest_assert.h

@@ -76,8 +76,9 @@ static inline bool z_zexpect_(bool cond, const char *file, int line)
 
 #else /* CONFIG_ZTEST_ASSERT_VERBOSE != 0 */
 
-static inline bool z_zassert(bool cond, const char *default_msg, const char *file, int line,
-			     const char *func, const char *msg, ...)
+static inline __printf_like(6, 7) bool z_zassert(bool cond, const char *default_msg,
+						 const char *file, int line, const char *func,
+						 const char *msg, ...)
 {
 	if (cond == false) {
 		va_list vargs;
@@ -100,8 +101,9 @@ static inline bool z_zassert(bool cond, const char *default_msg, const char *fil
 	return true;
 }
 
-static inline bool z_zassume(bool cond, const char *default_msg, const char *file, int line,
-			     const char *func, const char *msg, ...)
+static inline __printf_like(6, 7) bool z_zassume(bool cond, const char *default_msg,
+						 const char *file, int line, const char *func,
+						 const char *msg, ...)
 {
 	if (cond == false) {
 		va_list vargs;
@@ -124,8 +126,9 @@ static inline bool z_zassume(bool cond, const char *default_msg, const char *fil
 	return true;
 }
 
-static inline bool z_zexpect(bool cond, const char *default_msg, const char *file, int line,
-			     const char *func, const char *msg, ...)
+static inline __printf_like(6, 7) bool z_zexpect(bool cond, const char *default_msg,
+						 const char *file, int line, const char *func,
+						 const char *msg, ...)
 {
 	if (cond == false) {
 		va_list vargs;