1 // SPDX-License-Identifier: GPL-2.0
3  * Test cases for compiler-based stack variable zeroing via future
8 #include <linux/init.h>
75 #define INIT_STRUCT_dynamic_partial	= { .two = arg->two, }
76 #define INIT_STRUCT_dynamic_all		= { .one = arg->one,		\
77 					    .two = arg->two,		\
78 					    .three = arg->three,	\
79 					    .four = arg->four,		\
107 	/* Fill clone type with zero for per-field init. */	\
123 	/* Extract stack-defined variable contents. */		\
133 			(int)((ssize_t)(uintptr_t)fill_start -	\
152 /* no-op to force compiler into ignoring "uninitialized" vars */\
191 	return (int)buf[0] | (int)buf[sizeof(buf) - 1];		\
226 	/* "sizeof(unsigned long) - 1" byte padding hole here. */
237 #define DEFINE_SCALAR_TEST(name, init)				\  argument
238 		DEFINE_TEST(name ## _ ## init, name, SCALAR, init)
240 #define DEFINE_SCALAR_TESTS(init)				\  argument
241 		DEFINE_SCALAR_TEST(u8, init);			\
242 		DEFINE_SCALAR_TEST(u16, init);			\
243 		DEFINE_SCALAR_TEST(u32, init);			\
244 		DEFINE_SCALAR_TEST(u64, init);			\
245 		DEFINE_TEST(char_array_ ## init, unsigned char, STRING, init)
247 #define DEFINE_STRUCT_TEST(name, init)				\  argument
248 		DEFINE_TEST(name ## _ ## init,			\
249 			    struct test_ ## name, STRUCT, init)
251 #define DEFINE_STRUCT_TESTS(init)				\  argument
252 		DEFINE_STRUCT_TEST(small_hole, init);		\
253 		DEFINE_STRUCT_TEST(big_hole, init);		\
254 		DEFINE_STRUCT_TEST(trailing_hole, init);	\
255 		DEFINE_STRUCT_TEST(packed, init)
276  * which was noticed as a special case in porting earlier stack init
328  * non-code areas (i.e. in a switch statement before the first "case").
338 #define test_scalars(init)	do {				\  in test_stackinit_init()  argument
339 		failures += test_u8_ ## init ();		\  in test_stackinit_init()
340 		failures += test_u16_ ## init ();		\  in test_stackinit_init()
341 		failures += test_u32_ ## init ();		\  in test_stackinit_init()
342 		failures += test_u64_ ## init ();		\  in test_stackinit_init()
343 		failures += test_char_array_ ## init ();	\  in test_stackinit_init()
346 #define test_structs(init)	do {				\  in test_stackinit_init()  argument
347 		failures += test_small_hole_ ## init ();	\  in test_stackinit_init()
348 		failures += test_big_hole_ ## init ();		\  in test_stackinit_init()
349 		failures += test_trailing_hole_ ## init ();	\  in test_stackinit_init()
350 		failures += test_packed_ ## init ();		\  in test_stackinit_init()
381 	return failures ? -EINVAL : 0;  in test_stackinit_init()