diff mbox series

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

Message ID 20240424-nolibc-musl-brk-v1-1-b49882dd9a93@weissschuh.net (mailing list archive)
State New
Headers show
Series selftests/nolibc: disable brk()/sbrk() tests on musl | expand

Commit Message

Thomas Weißschuh April 23, 2024, 10:15 p.m. UTC 
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@weissschuh.net>
---
 tools/testing/selftests/nolibc/nolibc-test.c | 10 +++++++---
 1 file changed, 7 insertions(+), 3 deletions(-)


---
base-commit: 0adab2b6b7336fb6ee3c6456a432dad3b1d25647
change-id: 20240423-nolibc-musl-brk-7784add29801

Best regards,

Comments

Willy Tarreau April 24, 2024, 2:13 a.m. UTC | #1 
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@weissschuh.net>
> ---
>  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
Willy Tarreau April 24, 2024, 10:02 p.m. UTC | #2 
On Wed, Apr 24, 2024 at 04:13:13AM +0200, Willy Tarreau wrote:
> 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@weissschuh.net>
> > ---
> >  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!

BTW, Acked-by: Willy Tarreau <w@1wt.eu>

Willy
diff mbox series

Patch

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;