[PATCH v2 22/22] selftests/nolibc: Add `getpagesize(2)` selftest

Willy Tarreau
2023-01-10T07:28:45Z

From: Ammar Faizi <ammarfaizi2@gnuweeb.org>

Test the getpagesize() function. Make sure it returns the correct
value.

Signed-off-by: Ammar Faizi <ammarfaizi2@gnuweeb.org>
Signed-off-by: Willy Tarreau <w@1wt.eu>
---
tools/testing/selftests/nolibc/nolibc-test.c | 30 ++++++++++++++++++++
1 file changed, 30 insertions(+)

diff --git a/tools/testing/selftests/nolibc/nolibc-test.c b/tools/testing/selftests/nolibc/nolibc-test.c
index f14f5076fb6d..c4a0c915139c 100644
--- a/tools/testing/selftests/nolibc/nolibc-test.c
+++ b/tools/testing/selftests/nolibc/nolibc-test.c
@@ -442,6 +442,35 @@ int test_getdents64(const char *dir)
return ret;
}

+static int test_getpagesize(void)
+{
+ long x = getpagesize();
+ int c;
+
+ if (x < 0)
+ return x;
+
+#if defined(__x86_64__) || defined(__i386__) || defined(__i486__) || defined(__i586__) || defined(__i686__)
+ /*
+ * x86 family is always 4K page.
+ */
+ c = (x == 4096);
+#elif defined(__aarch64__)
+ /*
+ * Linux aarch64 supports three values of page size: 4K, 16K, and 64K
+ * which are selected at kernel compilation time.
+ */
+ c = (x == 4096 || x == (16 * 1024) || x == (64 * 1024));
+#else
+ /*
+ * Assuming other architectures must have at least 4K page.
+ */
+ c = (x >= 4096);
+#endif
+
+ return !c;
+}
+
/* Run syscall tests between IDs <min> and <max>.
* Return 0 on success, non-zero on failure.
*/
@@ -502,6 +531,7 @@ int run_syscall(int min, int max)
CASE_TEST(gettimeofday_bad2); EXPECT_SYSER(1, gettimeofday(NULL, (void *)1), -1, EFAULT); break;
CASE_TEST(gettimeofday_bad2); EXPECT_SYSER(1, gettimeofday(NULL, (void *)1), -1, EFAULT); break;
#endif
+ CASE_TEST(getpagesize); EXPECT_SYSZR(1, test_getpagesize()); break;
CASE_TEST(ioctl_tiocinq); EXPECT_SYSZR(1, ioctl(0, TIOCINQ, &tmp)); break;
CASE_TEST(ioctl_tiocinq); EXPECT_SYSZR(1, ioctl(0, TIOCINQ, &tmp)); break;
CASE_TEST(link_root1); EXPECT_SYSER(1, link("/", "/"), -1, EEXIST); break;
--
2.17.5