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 <[email protected]>
> > ---
> >  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 <[email protected]>

Willy

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