Commit 6cada284 authored by Thomas Weißschuh's avatar Thomas Weißschuh
Browse files

selftests/nolibc: disable brk()/sbrk() tests on musl 



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: default avatarThomas Weißschuh <linux@weissschuh.net>
Acked-by: default avatarWilly Tarreau <w@1wt.eu>
Link: https://lore.kernel.org/r/20240424-nolibc-musl-brk-v1-1-b49882dd9a93@weissschuh.net
parent 92098b1c

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

+7 −3
Original line number Diff line number Diff line
@@ -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;