Moritz Angermann pushed to branch wip/angerman/testsuite-fix-exec_signals at Glasgow Haskell Compiler / GHC Commits: 57f53914 by Moritz Angermann at 2025-09-08T13:03:39+09:00 testsuite: Fix broken exec_signals_child.c There is no signal 0. The signal mask is 1-32. - - - - - 1 changed file: - testsuite/tests/rts/exec_signals_child.c Changes: ===================================== testsuite/tests/rts/exec_signals_child.c ===================================== @@ -2,8 +2,11 @@ #include #include -// Prints the state of the signal handlers to stdout -int main() +// Prints the state of the signal handlers to stdout. +// NOTE: We intentionally start at signal 1 (not 0). Signal number 0 is not a +// real signal; passing 0 to sigismember/sigaction is undefined behaviour and +// on Darwin was observed to yield memory corruption / junk bytes in output. +int main(void) { int open = 0, i; sigset_t blockedsigs; @@ -11,7 +14,7 @@ int main() printf("ChildInfo { masked = ["); sigprocmask(SIG_BLOCK, NULL, &blockedsigs); - for(i = 0; i < NSIG; ++i) + for(i = 1; i < NSIG; ++i) { int ret = sigismember(&blockedsigs, i); if(ret >= 0) @@ -26,7 +29,7 @@ int main() printf("], handlers = ["); open = 0; - for(i = 0; i < NSIG; ++i) + for(i = 1; i < NSIG; ++i) { struct sigaction old; if(sigaction(i, NULL, &old) >= 0) View it on GitLab: https://gitlab.haskell.org/ghc/ghc/-/commit/57f53914a1011bdeeebb091c5e84d0ff... -- View it on GitLab: https://gitlab.haskell.org/ghc/ghc/-/commit/57f53914a1011bdeeebb091c5e84d0ff... You're receiving this email because of your account on gitlab.haskell.org.