On Wed, Apr 24, 2024 at 12:15:33AM +0200, Thomas Weißschuh wrote:
> On musl calls to brk() and sbrk() always fail with ENOMEM.
> Detect this and skip the tests on musl.
>
> Tested on glibc 2.39 and musl 1.2.5 in addition to nolibc.
>
> Signed-off-by: Thomas Weißschuh <linux@xxxxxxxxxxxxxx>
> ---
> tools/testing/selftests/nolibc/nolibc-test.c | 10 +++++++---
> 1 file changed, 7 insertions(+), 3 deletions(-)
>
> diff --git a/tools/testing/selftests/nolibc/nolibc-test.c b/tools/testing/selftests/nolibc/nolibc-test.c
> index 94bb6e11c16f..89be9ba95179 100644
> --- a/tools/testing/selftests/nolibc/nolibc-test.c
> +++ b/tools/testing/selftests/nolibc/nolibc-test.c
> @@ -942,6 +942,7 @@ int run_syscall(int min, int max)
> int ret = 0;
> void *p1, *p2;
> int has_gettid = 1;
> + int has_brk;
>
> /* <proc> indicates whether or not /proc is mounted */
> proc = stat("/proc", &stat_buf) == 0;
> @@ -954,6 +955,9 @@ int run_syscall(int min, int max)
> has_gettid = __GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 30);
> #endif
>
> + /* on musl setting brk()/sbrk() always fails */
> + has_brk = brk(0) == 0;
> +
> for (test = min; test >= 0 && test <= max; test++) {
> int llen = 0; /* line length */
>
> @@ -969,9 +973,9 @@ int run_syscall(int min, int max)
> CASE_TEST(kill_0); EXPECT_SYSZR(1, kill(getpid(), 0)); break;
> CASE_TEST(kill_CONT); EXPECT_SYSZR(1, kill(getpid(), 0)); break;
> CASE_TEST(kill_BADPID); EXPECT_SYSER(1, kill(INT_MAX, 0), -1, ESRCH); break;
> - CASE_TEST(sbrk_0); EXPECT_PTRNE(1, sbrk(0), (void *)-1); break;
> - CASE_TEST(sbrk); if ((p1 = p2 = sbrk(4096)) != (void *)-1) p2 = sbrk(-4096); EXPECT_SYSZR(1, (p2 == (void *)-1) || p2 == p1); break;
> - CASE_TEST(brk); EXPECT_SYSZR(1, brk(sbrk(0))); break;
> + CASE_TEST(sbrk_0); EXPECT_PTRNE(has_brk, sbrk(0), (void *)-1); break;
> + CASE_TEST(sbrk); if ((p1 = p2 = sbrk(4096)) != (void *)-1) p2 = sbrk(-4096); EXPECT_SYSZR(has_brk, (p2 == (void *)-1) || p2 == p1); break;
> + CASE_TEST(brk); EXPECT_SYSZR(has_brk, brk(sbrk(0))); break;
> CASE_TEST(chdir_root); EXPECT_SYSZR(1, chdir("/")); chdir(getenv("PWD")); break;
> CASE_TEST(chdir_dot); EXPECT_SYSZR(1, chdir(".")); break;
> CASE_TEST(chdir_blah); EXPECT_SYSER(1, chdir("/blah"), -1, ENOENT); break;
Looks good, thank you Thomas!
Willy
