Contributors: 3
Author Tokens Token Proportion Commits Commit Proportion
Lorenzo Stoakes 1733 58.47% 6 35.29%
Lorenzo Stoakes (Oracle) 1224 41.30% 10 58.82%
Suren Baghdasaryan 7 0.24% 1 5.88%
Total 2964 17 


// SPDX-License-Identifier: GPL-2.0-or-later

static bool compare_legacy_flags(vm_flags_t legacy_flags, vma_flags_t flags)
{
	const unsigned long legacy_val = legacy_flags;
	/* The lower word should contain the precise same value. */
	const unsigned long flags_lower = flags.__vma_flags[0];
	vma_flags_t converted_flags;
#if NUM_VMA_FLAG_BITS > BITS_PER_LONG
	int i;

	/* All bits in higher flag values should be zero. */
	for (i = 1; i < NUM_VMA_FLAG_BITS / BITS_PER_LONG; i++) {
		if (flags.__vma_flags[i] != 0)
			return false;
	}
#endif

	static_assert(sizeof(legacy_flags) == sizeof(unsigned long));

	/* Assert that legacy flag helpers work correctly. */
	converted_flags = legacy_to_vma_flags(legacy_flags);
	ASSERT_FLAGS_SAME_MASK(&converted_flags, flags);
	ASSERT_EQ(vma_flags_to_legacy(flags), legacy_flags);

	return legacy_val == flags_lower;
}

static bool test_copy_vma(void)
{
	vma_flags_t vma_flags = mk_vma_flags(VMA_READ_BIT, VMA_WRITE_BIT,
					     VMA_MAYREAD_BIT, VMA_MAYWRITE_BIT);
	struct mm_struct mm = {};
	bool need_locks = false;
	VMA_ITERATOR(vmi, &mm, 0);
	struct vm_area_struct *vma, *vma_new, *vma_next;

	/* Move backwards and do not merge. */

	vma = alloc_and_link_vma(&mm, 0x3000, 0x5000, 3, vma_flags);
	vma_new = copy_vma(&vma, 0, 0x2000, 0, &need_locks);
	ASSERT_NE(vma_new, vma);
	ASSERT_EQ(vma_new->vm_start, 0);
	ASSERT_EQ(vma_new->vm_end, 0x2000);
	ASSERT_EQ(vma_new->vm_pgoff, 0);
	vma_assert_attached(vma_new);

	cleanup_mm(&mm, &vmi);

	/* Move a VMA into position next to another and merge the two. */

	vma = alloc_and_link_vma(&mm, 0, 0x2000, 0, vma_flags);
	vma_next = alloc_and_link_vma(&mm, 0x6000, 0x8000, 6, vma_flags);
	vma_new = copy_vma(&vma, 0x4000, 0x2000, 4, &need_locks);
	vma_assert_attached(vma_new);

	ASSERT_EQ(vma_new, vma_next);

	cleanup_mm(&mm, &vmi);
	return true;
}

static bool test_vma_flags_unchanged(void)
{
	vma_flags_t flags = EMPTY_VMA_FLAGS;
	vm_flags_t legacy_flags = 0;
	int bit;
	struct vm_area_struct vma;
	struct vm_area_desc desc;

	vma.flags = EMPTY_VMA_FLAGS;
	desc.vma_flags = EMPTY_VMA_FLAGS;

	for (bit = 0; bit < BITS_PER_LONG; bit++) {
		vma_flags_t mask = mk_vma_flags(bit);

		legacy_flags |= (1UL << bit);

		/* Individual flags. */
		vma_flags_set(&flags, bit);
		ASSERT_TRUE(compare_legacy_flags(legacy_flags, flags));

		/* Via mask. */
		vma_flags_set_mask(&flags, mask);
		ASSERT_TRUE(compare_legacy_flags(legacy_flags, flags));

		/* Same for VMA. */
		vma_set_flags(&vma, bit);
		ASSERT_TRUE(compare_legacy_flags(legacy_flags, vma.flags));
		vma_set_flags_mask(&vma, mask);
		ASSERT_TRUE(compare_legacy_flags(legacy_flags, vma.flags));

		/* Same for VMA descriptor. */
		vma_desc_set_flags(&desc, bit);
		ASSERT_TRUE(compare_legacy_flags(legacy_flags, desc.vma_flags));
		vma_desc_set_flags_mask(&desc, mask);
		ASSERT_TRUE(compare_legacy_flags(legacy_flags, desc.vma_flags));
	}

	return true;
}

static bool test_vma_flags_cleared(void)
{
	const vma_flags_t empty = EMPTY_VMA_FLAGS;
	vma_flags_t flags;
	int i;

	/* Set all bits high. */
	memset(&flags, 1, sizeof(flags));
	/* Try to clear. */
	vma_flags_clear_all(&flags);
	/* Equal to EMPTY_VMA_FLAGS? */
	ASSERT_EQ(memcmp(&empty, &flags, sizeof(flags)), 0);
	/* Make sure every unsigned long entry in bitmap array zero. */
	for (i = 0; i < sizeof(flags) / BITS_PER_LONG; i++) {
		const unsigned long val = flags.__vma_flags[i];

		ASSERT_EQ(val, 0);
	}

	return true;
}

#if NUM_VMA_FLAG_BITS > 64
/*
 * Assert that VMA flag functions that operate at the system word level function
 * correctly.
 */
static bool test_vma_flags_word(void)
{
	vma_flags_t flags = EMPTY_VMA_FLAGS;
	const vma_flags_t comparison =
		mk_vma_flags(VMA_READ_BIT, VMA_WRITE_BIT

			     , 64, 65
			);

	/* Set some custom high flags. */
	vma_flags_set(&flags, 64, 65);

	/* Now overwrite the first word. */
	vma_flags_overwrite_word(&flags, VM_READ | VM_WRITE);
	/* Ensure they are equal. */
	ASSERT_EQ(memcmp(&flags, &comparison, sizeof(flags)), 0);

	flags = EMPTY_VMA_FLAGS;
	vma_flags_set(&flags, 64, 65);

	/* Do the same with the _once() equivalent. */
	vma_flags_overwrite_word_once(&flags, VM_READ | VM_WRITE);
	ASSERT_EQ(memcmp(&flags, &comparison, sizeof(flags)), 0);

	flags = EMPTY_VMA_FLAGS;
	vma_flags_set(&flags, 64, 65);

	/* Make sure we can set a word without disturbing other bits. */
	vma_flags_set(&flags, VMA_WRITE_BIT);
	vma_flags_set_word(&flags, VM_READ);
	ASSERT_EQ(memcmp(&flags, &comparison, sizeof(flags)), 0);

	flags = EMPTY_VMA_FLAGS;
	vma_flags_set(&flags, 64, 65);

	/* Make sure we can clear a word without disturbing other bits. */
	vma_flags_set(&flags, VMA_READ_BIT, VMA_WRITE_BIT, VMA_EXEC_BIT);
	vma_flags_clear_word(&flags, VM_EXEC);
	ASSERT_EQ(memcmp(&flags, &comparison, sizeof(flags)), 0);

	return true;
}
#endif /* NUM_VMA_FLAG_BITS > 64 */

/* Ensure that vma_flags_test() and friends works correctly. */
static bool test_vma_flags_test(void)
{
	vma_flags_t flags = mk_vma_flags(VMA_READ_BIT, VMA_WRITE_BIT,
					 VMA_EXEC_BIT
#if NUM_VMA_FLAG_BITS > 64
					 , 64, 65
#endif
		);
	struct vm_area_desc desc = {
		.vma_flags = flags,
	};
	struct vm_area_struct vma = {
		.flags = flags,
	};

#define do_test(_flag)							    \
	ASSERT_TRUE(vma_flags_test(&flags, _flag));			    \
	ASSERT_TRUE(vma_flags_test_single_mask(&flags, mk_vma_flags(_flag))); \
	ASSERT_TRUE(vma_test(&vma, _flag));				    \
	ASSERT_TRUE(vma_test_single_mask(&vma, mk_vma_flags(_flag)));	    \
	ASSERT_TRUE(vma_desc_test(&desc, _flag))

#define do_test_false(_flag)						     \
	ASSERT_FALSE(vma_flags_test(&flags, _flag));			     \
	ASSERT_FALSE(vma_flags_test_single_mask(&flags, mk_vma_flags(_flag))); \
	ASSERT_FALSE(vma_test(&vma, _flag));				     \
	ASSERT_FALSE(vma_test_single_mask(&vma, mk_vma_flags(_flag)));	     \
	ASSERT_FALSE(vma_desc_test(&desc, _flag))

	do_test(VMA_READ_BIT);
	do_test(VMA_WRITE_BIT);
	do_test(VMA_EXEC_BIT);
#if NUM_VMA_FLAG_BITS > 64
	do_test(64);
	do_test(65);
#endif
	do_test_false(VMA_MAYWRITE_BIT);
#if NUM_VMA_FLAG_BITS > 64
	do_test_false(66);
#endif

#undef do_test
#undef do_test_false

	/* We define the _single_mask() variants to return false if empty. */
	ASSERT_FALSE(vma_flags_test_single_mask(&flags, EMPTY_VMA_FLAGS));
	ASSERT_FALSE(vma_test_single_mask(&vma, EMPTY_VMA_FLAGS));
	/* Even when both flags and tested flag mask are empty! */
	flags = EMPTY_VMA_FLAGS;
	vma.flags = EMPTY_VMA_FLAGS;
	ASSERT_FALSE(vma_flags_test_single_mask(&flags, EMPTY_VMA_FLAGS));
	ASSERT_FALSE(vma_test_single_mask(&vma, EMPTY_VMA_FLAGS));

	return true;
}

/* Ensure that vma_flags_test_any() and friends works correctly. */
static bool test_vma_flags_test_any(void)
{
	const vma_flags_t flags = mk_vma_flags(VMA_READ_BIT, VMA_WRITE_BIT,
					       VMA_EXEC_BIT
#if NUM_VMA_FLAG_BITS > 64
					       , 64, 65
#endif
		);
	struct vm_area_struct vma = {
		.flags = flags,
	};
	struct vm_area_desc desc = {
		.vma_flags = flags,
	};

#define do_test(...)						\
	ASSERT_TRUE(vma_flags_test_any(&flags, __VA_ARGS__));	\
	ASSERT_TRUE(vma_desc_test_any(&desc, __VA_ARGS__));	\
	ASSERT_TRUE(vma_test_any(&vma, __VA_ARGS__));

#define do_test_all_true(...)					\
	ASSERT_TRUE(vma_flags_test_all(&flags, __VA_ARGS__));	\
	ASSERT_TRUE(vma_test_all(&vma, __VA_ARGS__))

#define do_test_all_false(...)					\
	ASSERT_FALSE(vma_flags_test_all(&flags, __VA_ARGS__));	\
	ASSERT_FALSE(vma_test_all(&vma, __VA_ARGS__))

	/*
	 * Testing for some flags that are present, some that are not - should
	 * pass. ANY flags matching should work.
	 */
	do_test(VMA_READ_BIT, VMA_MAYREAD_BIT, VMA_SEQ_READ_BIT);
	/* However, the ...test_all() variant should NOT pass. */
	do_test_all_false(VMA_READ_BIT, VMA_MAYREAD_BIT, VMA_SEQ_READ_BIT);
#if NUM_VMA_FLAG_BITS > 64
	/* But should pass for flags present. */
	do_test_all_true(VMA_READ_BIT, VMA_WRITE_BIT, VMA_EXEC_BIT, 64, 65);
	/* Also subsets... */
	do_test_all_true(VMA_READ_BIT, VMA_WRITE_BIT, VMA_EXEC_BIT, 64);
#endif
	do_test_all_true(VMA_READ_BIT, VMA_WRITE_BIT, VMA_EXEC_BIT);
	do_test_all_true(VMA_READ_BIT, VMA_WRITE_BIT);
	do_test_all_true(VMA_READ_BIT);
	/*
	 * Check _mask variant. We don't need to test extensively as macro
	 * helper is the equivalent.
	 */
	ASSERT_TRUE(vma_flags_test_any_mask(&flags, flags));
	ASSERT_TRUE(vma_flags_test_all_mask(&flags, flags));

	/* Single bits. */
	do_test(VMA_READ_BIT);
	do_test(VMA_WRITE_BIT);
	do_test(VMA_EXEC_BIT);
#if NUM_VMA_FLAG_BITS > 64
	do_test(64);
	do_test(65);
#endif

	/* Two bits. */
	do_test(VMA_READ_BIT, VMA_WRITE_BIT);
	do_test(VMA_READ_BIT, VMA_EXEC_BIT);
	do_test(VMA_WRITE_BIT, VMA_EXEC_BIT);
	/* Ordering shouldn't matter. */
	do_test(VMA_WRITE_BIT, VMA_READ_BIT);
	do_test(VMA_EXEC_BIT, VMA_READ_BIT);
	do_test(VMA_EXEC_BIT, VMA_WRITE_BIT);
#if NUM_VMA_FLAG_BITS > 64
	do_test(VMA_READ_BIT, 64);
	do_test(VMA_WRITE_BIT, 64);
	do_test(64, VMA_READ_BIT);
	do_test(64, VMA_WRITE_BIT);
	do_test(VMA_READ_BIT, 65);
	do_test(VMA_WRITE_BIT, 65);
	do_test(65, VMA_READ_BIT);
	do_test(65, VMA_WRITE_BIT);
#endif
	/* Three bits. */
	do_test(VMA_READ_BIT, VMA_WRITE_BIT, VMA_EXEC_BIT);
#if NUM_VMA_FLAG_BITS > 64
	/* No need to consider every single permutation. */
	do_test(VMA_READ_BIT, VMA_WRITE_BIT, 64);
	do_test(VMA_READ_BIT, VMA_WRITE_BIT, 65);

	/* Four bits. */
	do_test(VMA_READ_BIT, VMA_WRITE_BIT, VMA_EXEC_BIT, 64);
	do_test(VMA_READ_BIT, VMA_WRITE_BIT, VMA_EXEC_BIT, 65);

	/* Five bits. */
	do_test(VMA_READ_BIT, VMA_WRITE_BIT, VMA_EXEC_BIT, 64, 65);
#endif

	/* Testing all flags against none trivially succeeds. */
	ASSERT_TRUE(vma_flags_test_all_mask(&flags, EMPTY_VMA_FLAGS));
	ASSERT_TRUE(vma_test_all_mask(&vma, EMPTY_VMA_FLAGS));

#undef do_test
#undef do_test_all_true
#undef do_test_all_false

	return true;
}

/* Ensure that vma_flags_clear() and friends works correctly. */
static bool test_vma_flags_clear(void)
{
	vma_flags_t flags = mk_vma_flags(VMA_READ_BIT, VMA_WRITE_BIT,
					 VMA_EXEC_BIT
#if NUM_VMA_FLAG_BITS > 64
					       , 64, 65
#endif
		);
	vma_flags_t mask = mk_vma_flags(VMA_EXEC_BIT
#if NUM_VMA_FLAG_BITS > 64
					, 64
#endif
		);
	struct vm_area_struct vma = {
		.flags = flags,
	};
	struct vm_area_desc desc = {
		.vma_flags = flags,
	};

	/* Cursory check of _mask() variant, as the helper macros imply. */
	vma_flags_clear_mask(&flags, mask);
	vma_clear_flags_mask(&vma, mask);
	vma_desc_clear_flags_mask(&desc, mask);
#if NUM_VMA_FLAG_BITS > 64
	ASSERT_FALSE(vma_flags_test_any(&flags, VMA_EXEC_BIT, 64));
	ASSERT_FALSE(vma_test_any(&vma, VMA_EXEC_BIT, 64));
	ASSERT_FALSE(vma_desc_test_any(&desc, VMA_EXEC_BIT, 64));
	/* Reset. */
	vma_flags_set(&flags, VMA_EXEC_BIT, 64);
	vma_set_flags(&vma, VMA_EXEC_BIT, 64);
	vma_desc_set_flags(&desc, VMA_EXEC_BIT, 64);
#endif

	/*
	 * Clear the flags and assert clear worked, then reset flags back to
	 * include specified flags.
	 */
#define do_test_and_reset(...)						\
	vma_flags_clear(&flags, __VA_ARGS__);				\
	vma_clear_flags(&vma, __VA_ARGS__);				\
	vma_desc_clear_flags(&desc, __VA_ARGS__);			\
	ASSERT_FALSE(vma_flags_test_any(&flags, __VA_ARGS__));		\
	ASSERT_FALSE(vma_test_any(&vma, __VA_ARGS__));			\
	ASSERT_FALSE(vma_desc_test_any(&desc, __VA_ARGS__));		\
	vma_flags_set(&flags, __VA_ARGS__);				\
	vma_set_flags(&vma, __VA_ARGS__);				\
	vma_desc_set_flags(&desc, __VA_ARGS__)

	/* Single flags. */
	do_test_and_reset(VMA_READ_BIT);
	do_test_and_reset(VMA_WRITE_BIT);
	do_test_and_reset(VMA_EXEC_BIT);
#if NUM_VMA_FLAG_BITS > 64
	do_test_and_reset(64);
	do_test_and_reset(65);
#endif

	/* Two flags, in different orders. */
	do_test_and_reset(VMA_READ_BIT, VMA_WRITE_BIT);
	do_test_and_reset(VMA_READ_BIT, VMA_EXEC_BIT);
#if NUM_VMA_FLAG_BITS > 64
	do_test_and_reset(VMA_READ_BIT, 64);
	do_test_and_reset(VMA_READ_BIT, 65);
#endif
	do_test_and_reset(VMA_WRITE_BIT, VMA_READ_BIT);
	do_test_and_reset(VMA_WRITE_BIT, VMA_EXEC_BIT);
#if NUM_VMA_FLAG_BITS > 64
	do_test_and_reset(VMA_WRITE_BIT, 64);
	do_test_and_reset(VMA_WRITE_BIT, 65);
#endif
	do_test_and_reset(VMA_EXEC_BIT, VMA_READ_BIT);
	do_test_and_reset(VMA_EXEC_BIT, VMA_WRITE_BIT);
#if NUM_VMA_FLAG_BITS > 64
	do_test_and_reset(VMA_EXEC_BIT, 64);
	do_test_and_reset(VMA_EXEC_BIT, 65);
	do_test_and_reset(64, VMA_READ_BIT);
	do_test_and_reset(64, VMA_WRITE_BIT);
	do_test_and_reset(64, VMA_EXEC_BIT);
	do_test_and_reset(64, 65);
	do_test_and_reset(65, VMA_READ_BIT);
	do_test_and_reset(65, VMA_WRITE_BIT);
	do_test_and_reset(65, VMA_EXEC_BIT);
	do_test_and_reset(65, 64);
#endif

	/* Three flags. */

#undef do_test_some_missing
#undef do_test_and_reset

	return true;
}

/* Ensure that vma_flags_empty() works correctly. */
static bool test_vma_flags_empty(void)
{
	vma_flags_t flags = mk_vma_flags(VMA_READ_BIT, VMA_WRITE_BIT,
					 VMA_EXEC_BIT
#if NUM_VMA_FLAG_BITS > 64
					       , 64, 65
#endif
		);

	ASSERT_FLAGS_NONEMPTY(&flags);
	vma_flags_clear(&flags, VMA_READ_BIT, VMA_WRITE_BIT, VMA_EXEC_BIT);
#if NUM_VMA_FLAG_BITS > 64
	ASSERT_FLAGS_NONEMPTY(&flags);
	vma_flags_clear(&flags, 64, 65);
	ASSERT_FLAGS_EMPTY(&flags);
#else
	ASSERT_FLAGS_EMPTY(&flags);
#endif

	return true;
}

/* Ensure that vma_flags_diff_pair() works correctly. */
static bool test_vma_flags_diff(void)
{
	vma_flags_t flags1 = mk_vma_flags(VMA_READ_BIT, VMA_WRITE_BIT,
					  VMA_EXEC_BIT
#if NUM_VMA_FLAG_BITS > 64
					       , 64, 65
#endif
		);

	vma_flags_t flags2 = mk_vma_flags(VMA_READ_BIT, VMA_WRITE_BIT,
					  VMA_EXEC_BIT, VMA_MAYWRITE_BIT,
					  VMA_MAYEXEC_BIT
#if NUM_VMA_FLAG_BITS > 64
					  , 64, 65, 66, 67
#endif
		);
	vma_flags_t diff = vma_flags_diff_pair(&flags1, &flags2);

#if NUM_VMA_FLAG_BITS > 64
	ASSERT_FLAGS_SAME(&diff, VMA_MAYWRITE_BIT, VMA_MAYEXEC_BIT, 66, 67);
#else
	ASSERT_FLAGS_SAME(&diff, VMA_MAYWRITE_BIT, VMA_MAYEXEC_BIT);
#endif
	/* Should be the same even if re-ordered. */
	diff = vma_flags_diff_pair(&flags2, &flags1);
#if NUM_VMA_FLAG_BITS > 64
	ASSERT_FLAGS_SAME(&diff, VMA_MAYWRITE_BIT, VMA_MAYEXEC_BIT, 66, 67);
#else
	ASSERT_FLAGS_SAME(&diff, VMA_MAYWRITE_BIT, VMA_MAYEXEC_BIT);
#endif

	/* Should be no difference when applied against themselves. */
	diff = vma_flags_diff_pair(&flags1, &flags1);
	ASSERT_FLAGS_EMPTY(&diff);
	diff = vma_flags_diff_pair(&flags2, &flags2);
	ASSERT_FLAGS_EMPTY(&diff);

	/* One set of flags against an empty one should equal the original. */
	flags2 = EMPTY_VMA_FLAGS;
	diff = vma_flags_diff_pair(&flags1, &flags2);
	ASSERT_FLAGS_SAME_MASK(&diff, flags1);

	/* A subset should work too. */
	flags2 = mk_vma_flags(VMA_READ_BIT, VMA_WRITE_BIT);
	diff = vma_flags_diff_pair(&flags1, &flags2);
#if NUM_VMA_FLAG_BITS > 64
	ASSERT_FLAGS_SAME(&diff, VMA_EXEC_BIT, 64, 65);
#else
	ASSERT_FLAGS_SAME(&diff, VMA_EXEC_BIT);
#endif

	return true;
}

/* Ensure that vma_flags_and() and friends work correctly. */
static bool test_vma_flags_and(void)
{
	vma_flags_t flags1 = mk_vma_flags(VMA_READ_BIT, VMA_WRITE_BIT,
					  VMA_EXEC_BIT
#if NUM_VMA_FLAG_BITS > 64
					       , 64, 65
#endif
		);
	vma_flags_t flags2 = mk_vma_flags(VMA_READ_BIT, VMA_WRITE_BIT,
					  VMA_EXEC_BIT, VMA_MAYWRITE_BIT,
					  VMA_MAYEXEC_BIT
#if NUM_VMA_FLAG_BITS > 64
					  , 64, 65, 66, 67
#endif
		);
	vma_flags_t flags3 = mk_vma_flags(VMA_IO_BIT, VMA_MAYBE_GUARD_BIT
#if NUM_VMA_FLAG_BITS > 64
					  , 68, 69
#endif
		);
	vma_flags_t and = vma_flags_and_mask(&flags1, flags2);

#if NUM_VMA_FLAG_BITS > 64
	ASSERT_FLAGS_SAME(&and, VMA_READ_BIT, VMA_WRITE_BIT, VMA_EXEC_BIT,
			  64, 65);
#else
	ASSERT_FLAGS_SAME(&and, VMA_READ_BIT, VMA_WRITE_BIT, VMA_EXEC_BIT);
#endif

	and = vma_flags_and_mask(&flags1, flags1);
	ASSERT_FLAGS_SAME_MASK(&and, flags1);

	and = vma_flags_and_mask(&flags2, flags2);
	ASSERT_FLAGS_SAME_MASK(&and, flags2);

	and = vma_flags_and_mask(&flags1, flags3);
	ASSERT_FLAGS_EMPTY(&and);
	and = vma_flags_and_mask(&flags2, flags3);
	ASSERT_FLAGS_EMPTY(&and);

	and = vma_flags_and(&flags1, VMA_READ_BIT);
	ASSERT_FLAGS_SAME(&and, VMA_READ_BIT);

	and = vma_flags_and(&flags1, VMA_READ_BIT, VMA_WRITE_BIT);
	ASSERT_FLAGS_SAME(&and, VMA_READ_BIT, VMA_WRITE_BIT);

	and = vma_flags_and(&flags1, VMA_READ_BIT, VMA_WRITE_BIT, VMA_EXEC_BIT);
	ASSERT_FLAGS_SAME(&and, VMA_READ_BIT, VMA_WRITE_BIT, VMA_EXEC_BIT);

#if NUM_VMA_FLAG_BITS > 64
	and = vma_flags_and(&flags1, VMA_READ_BIT, VMA_WRITE_BIT, VMA_EXEC_BIT,
			    64);
	ASSERT_FLAGS_SAME(&and, VMA_READ_BIT, VMA_WRITE_BIT, VMA_EXEC_BIT, 64);

	and = vma_flags_and(&flags1, VMA_READ_BIT, VMA_WRITE_BIT, VMA_EXEC_BIT,
			    64, 65);
	ASSERT_FLAGS_SAME(&and, VMA_READ_BIT, VMA_WRITE_BIT, VMA_EXEC_BIT, 64,
			  65);
#endif

	/* And against some missing values. */

	and = vma_flags_and(&flags1, VMA_READ_BIT, VMA_WRITE_BIT, VMA_EXEC_BIT,
			    VMA_IO_BIT);
	ASSERT_FLAGS_SAME(&and, VMA_READ_BIT, VMA_WRITE_BIT, VMA_EXEC_BIT);

	and = vma_flags_and(&flags1, VMA_READ_BIT, VMA_WRITE_BIT, VMA_EXEC_BIT,
			    VMA_IO_BIT, VMA_RAND_READ_BIT);
	ASSERT_FLAGS_SAME(&and, VMA_READ_BIT, VMA_WRITE_BIT, VMA_EXEC_BIT);

#if NUM_VMA_FLAG_BITS > 64
	and = vma_flags_and(&flags1, VMA_READ_BIT, VMA_WRITE_BIT, VMA_EXEC_BIT,
			    VMA_IO_BIT, VMA_RAND_READ_BIT, 69);
	ASSERT_FLAGS_SAME(&and, VMA_READ_BIT, VMA_WRITE_BIT, VMA_EXEC_BIT);
#endif

	return true;
}

/* Ensure append_vma_flags() acts as expected. */
static bool test_append_vma_flags(void)
{
	vma_flags_t flags = append_vma_flags(VMA_REMAP_FLAGS, VMA_READ_BIT,
					     VMA_WRITE_BIT
#if NUM_VMA_FLAG_BITS > 64
					     , 64, 65
#endif
		);

	ASSERT_FLAGS_SAME(&flags, VMA_IO_BIT, VMA_PFNMAP_BIT,
			  VMA_DONTEXPAND_BIT, VMA_DONTDUMP_BIT, VMA_READ_BIT,
			  VMA_WRITE_BIT
#if NUM_VMA_FLAG_BITS > 64
					     , 64, 65
#endif
		);

	flags = append_vma_flags(EMPTY_VMA_FLAGS, VMA_READ_BIT, VMA_WRITE_BIT);
	ASSERT_FLAGS_SAME(&flags, VMA_READ_BIT, VMA_WRITE_BIT);

	return true;
}

/* Assert that vma_flags_count() behaves as expected. */
static bool test_vma_flags_count(void)
{
	vma_flags_t flags = mk_vma_flags(VMA_READ_BIT, VMA_WRITE_BIT,
					 VMA_EXEC_BIT
#if NUM_VMA_FLAG_BITS > 64
					 , 64, 65
#endif
		);

#if NUM_VMA_FLAG_BITS > 64
	ASSERT_EQ(vma_flags_count(&flags), 5);
	vma_flags_clear(&flags, 64);
	ASSERT_EQ(vma_flags_count(&flags), 4);
	vma_flags_clear(&flags, 65);
#endif
	ASSERT_EQ(vma_flags_count(&flags), 3);
	vma_flags_clear(&flags, VMA_EXEC_BIT);
	ASSERT_EQ(vma_flags_count(&flags), 2);
	vma_flags_clear(&flags, VMA_WRITE_BIT);
	ASSERT_EQ(vma_flags_count(&flags), 1);
	vma_flags_clear(&flags, VMA_READ_BIT);
	ASSERT_EQ(vma_flags_count(&flags), 0);

	return true;
}

static void run_vma_tests(int *num_tests, int *num_fail)
{
	TEST(copy_vma);
	TEST(vma_flags_unchanged);
	TEST(vma_flags_cleared);
#if NUM_VMA_FLAG_BITS > 64
	TEST(vma_flags_word);
#endif
	TEST(vma_flags_test);
	TEST(vma_flags_test_any);
	TEST(vma_flags_clear);
	TEST(vma_flags_empty);
	TEST(vma_flags_diff);
	TEST(vma_flags_and);
	TEST(append_vma_flags);
	TEST(vma_flags_count);
}