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selftests/nolibc: test the memory allocator

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The memory allocator has not seen any testing so far.

Add a simple testcase for it.

Suggested-by: Willy Tarreau <w@1wt.eu>
Link: https://lore.kernel.org/lkml/adDRK8D6YBZgv36H@1wt.eu/
Signed-off-by: Thomas Weißschuh <linux@weissschuh.net>
Acked-by: Willy Tarreau <w@1wt.eu>
Link: https://patch.msgid.link/20260404-nolibc-asprintf-v2-2-17d2d0df9763@weissschuh.net
This commit is contained in:
Thomas Weißschuh
2026-04-04 13:50:20 +02:00
parent 1e3c374e9f
commit e70a7bb575
1 changed files with 55 additions and 0 deletions
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55
tools/testing/selftests/nolibc/nolibc-test.c
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@@ -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 */