Commit e70a7bb5 authored by Thomas Weißschuh's avatar Thomas Weißschuh
Browse files

selftests/nolibc: test the memory allocator 



The memory allocator has not seen any testing so far.

Add a simple testcase for it.

Suggested-by: default avatarWilly Tarreau <w@1wt.eu>
Link: https://lore.kernel.org/lkml/adDRK8D6YBZgv36H@1wt.eu/


Signed-off-by: default avatarThomas Weißschuh <linux@weissschuh.net>
Acked-by: default avatarWilly Tarreau <w@1wt.eu>
Link: https://patch.msgid.link/20260404-nolibc-asprintf-v2-2-17d2d0df9763@weissschuh.net
parent 1e3c374e

tools/testing/selftests/nolibc/nolibc-test.c

+55 −0
Original line number Diff line number Diff line
@@ -1555,6 +1555,60 @@ int test_time_types(void) 
	return 0;

}



int test_malloc(void)

{

	size_t sz_array1, sz_array2, sz_array3;

	int *array1, *array2, *array3;

	int pagesize = getpagesize();

	size_t idx;



	if (pagesize < 0)

		return 1;



	/* Dependent on the page size, as that is the granularity of our allocator. */

	sz_array1 = pagesize / 2;

	array1 = malloc(sz_array1 * sizeof(*array1));

	if (!array1)

		return 2;



	for (idx = 0; idx < sz_array1; idx++)

		array1[idx] = idx;



	sz_array2 = pagesize * 2;

	array2 = calloc(sz_array2, sizeof(*array2));

	if (!array2) {

		free(array1);

		return 3;

	}



	for (idx = 0; idx < sz_array2; idx++) {

		if (array2[idx] != 0) {

			free(array2);

			return 4;

		}

		array2[idx] = idx + sz_array1;

	}



	/* Resize array1 into array3 and append array2 at the end. */

	sz_array3 = sz_array1 + sz_array2;

	array3 = realloc(array1, sz_array3 * sizeof(*array3));

	if (!array3) {

		free(array2);

		free(array1);

		return 5;

	}

	memcpy(array3 + sz_array1, array2, sizeof(*array2) * sz_array2);

	free(array2);



	/* The contents must be contiguous now. */

	for (idx = 0; idx < sz_array3; idx++)

		if (array3[idx] != (int)idx)

			return 6;



	free(array3);

	return 0;

}



int run_stdlib(int min, int max)

{

	int test;
@@ -1687,6 +1741,7 @@ int run_stdlib(int min, int max) 
		CASE_TEST(makedev_big);             EXPECT_EQ(1, makedev(0x11223344, 0x55667788), 0x1122355667734488); break;

		CASE_TEST(major_big);               EXPECT_EQ(1, major(0x1122355667734488), 0x11223344); break;

		CASE_TEST(minor_big);               EXPECT_EQ(1, minor(0x1122355667734488), 0x55667788); break;

		CASE_TEST(malloc);                  EXPECT_ZR(1, test_malloc()); break;



		case __LINE__:

			return ret; /* must be last */