SIGSEGV in unit controller process on CentOS 6.9 about unit HOT 5 CLOSED

Could you show your ./configure output and build/autoconf.err? It looks like you don't have any working shared memory facility in your system.

from unit.

Thank you for your prompt answer!

[kost@dev]% ./configure
configuring for Linux 4.9.50-x86_64-linode86 x86_64
checking for C compiler: cc

• using GNU C compiler
• gcc version 4.4.7 20120313 (Red Hat 4.4.7-18) (GCC)
  building an "echo" program
  checking for int size ... 4
  checking for long size ... 8
  checking for long long size ... 8
  checking for void * size ... 8
  checking for size_t size ... 8
  checking for off_t size ... 8
  checking for time_t size ... 8
  checking for C99 variadic macro ... found
  checking for GCC __builtin_expect() ... found
  checking for GCC __builtin_unreachable() ... found
  checking for GCC __builtin_prefetch() ... not found
  checking for GCC __builtin_clz() ... found
  checking for GCC attribute visibility ... found
  checking for GCC attribute aligned ... found
  checking for GCC attribute malloc ... found
  checking for GCC attribute packed ... found
  checking for GCC builtin atomic operations ... found
  checking for posix_memalign() ... found
  checking for Linux malloc_usable_size() ... found
  checking for alloca() ... found
  checking for Linux mallopt() ... found
  checking for MAP_ANON ... found
  checking for MAP_POPULATE ... found
  checking for MAP_PREFAULT_READ ... not found
  checking for shm_open() ... not found
  checking for shm_open() in librt ... found but is not working
  checking for memfd_create() ... not found
  checking for Linux clock_gettime(CLOCK_REALTIME_COARSE) ... found
  checking for FreeBSD clock_gettime(CLOCK_REALTIME_FAST) ... not found
  checking for clock_gettime(CLOCK_REALTIME) ... not found
  checking for clock_gettime(CLOCK_REALTIME) in librt ... found
  checking for Linux clock_gettime(CLOCK_MONOTONIC_COARSE) ... found
  checking for FreeBSD clock_gettime(CLOCK_MONOTONIC_FAST) ... not found
  checking for clock_gettime(CLOCK_MONOTONIC) ... not found
  checking for clock_gettime(CLOCK_MONOTONIC) in librt ... found
  checking for HP-UX hg_gethrtime() ... not found
  checking for struct tm.tm_gmtoff ... found
  checking for altzone ... not found
  checking for localtime_r() ... found
  checking for pthread_yield() ... found
  checking for pthread spinlock ... found
  checking for pthread spinlock zero initial value ... found but is not working
  checking for MacOSX spinlock ... not found
  checking for sem_timedwait() ... not found
  checking for sem_timedwait() in libpthread ... found
  checking for __thread ... found
  checking for Linux epoll ... found
  checking for Linux signalfd() ... found
  checking for Linux eventfd() ... found
  checking for kqueue ... not found
  checking for Solaris event port ... not found
  checking for /dev/poll ... not found
  checking for AIX pollset ... not found
  checking for AF_INET6 ... found
  checking for sockaddr.sa_len ... not found
  checking for struct sockaddr size ... 16
  checking for struct sockaddr_in size ... 16
  checking for struct sockaddr_in6 size ... 28
  checking for struct sockaddr_un size ... 110
  checking for struct sockaddr_storage size ... 128
  checking for socketpair(AF_UNIX, SOCK_SEQPACKET) ... found
  checking for struct msghdr.msg_control ... found
  checking for sys/filio.h ... not found
  checking for ioctl(FIONBIO) ... found
  checking for socket(SOCK_NONBLOCK) ... found
  checking for accept4() ... found
  checking for Linux sendfile() ... found
  checking for posix_fadvise() ... found
  checking for fcntl(F_READAHEAD) ... not found
  checking for fcntl(F_RDAHEAD) ... not found
  checking for getrandom() ... not found
  checking for ucontext ... found
  checking for dlopen() ... not found
  checking for dlopen() in libdl ... found
  checking for posix_spawn() ... found
  checking for setproctitle() ... not found
  creating build/Makefile

Configuration summary:

unit bin directory: "bin"
unit sbin directory: "sbin"
unit modules directory: "build"
unit state directory: "build"

unit pid file: "unit.pid"
unit log file: "unit.log"

unit control API socket: "unix:control.unit.sock"

non-privileged user: "nobody"
non-privileged group: ""

IPv6 support: YES
Unix domain sockets support: YES
debug logging: NO

autoconf.err.txt

from unit.

Right.

checking for shm_open() ... not found
checking for shm_open() in librt ... found but is not working
checking for memfd_create() ... not found

Are you building Unit in some very restricted environment? Do you have /dev/shm mounted? Could you provide more information about your system?

Also, it seems you don't have kernel header files:

checking for memfd_create()
build/autotest.c:1:25: error: linux/memfd.h: No such file or directory

from unit.

I'm using CentOS on Linode, KVM virtualization.

Thanks for idea about shared memory - /dev/shm permissions was 755 instead of 777, everything works like a charm after fixing that.

from unit.

After 5ed4d7b Unit won't be compiled on systems with no working shared memory. The build is dysfunctional in this case.

from unit.