[compiler-rt] fix OpenBSD and Solaris build with sigaltstack interception

[sugak]

Summary

sigaltstack interception is implemented D73816. This updated OpenBSD and Solaris bits to fix the build errors.

[sugak]

Hi @mgorny and @krytarowski! This is my best effort fixing build errors caused by D73816. I don't have a good way to build and test it on NetBSD and would need your help with this.

[eugenis]

I've been told that freebsd is also broken.

[sugak]

include likely fixes for FreeBSD and OpenBSD.

[krytarowski]

NetBSD fix landed here:

commit b79b7674eb470963d0b558022a843c55b0b0ffe0
Author: Kamil Rytarowski <[e-mail]>
Date:   Tue Feb 4 23:30:05 2020 +0100

    [compiler-rt] [netbsd] Fix build after "implement sigaltstack interception"
    
    Fallout after: https://reviews.llvm.org/D73816

For the other OSs that were added later I cannot tell neither test anything so I resign as a reviewer.

[sugak]

Looks like FreeBSD was also fixed in:

commit 8a1f4feb1b749529ef2349bb7879a38b8d31f5f5
Author: Dimitry Andric <[e-mail]>
Date:   Tue Feb 4 22:50:05 2020 +0100

    [compiler-rt] Fix sanitizer_common build for FreeBSD

    This was broken by 28c91219c7e2, which added `struct_stack_t_sz` only to
    sanitizer_platform_limits_posix.{cpp,h}.

@eugenis what do you suggest we do with the remaining changes that affect solaris and OpenBSD?

[sugak]

Rebase

[eugenis]

I always get confused with *bsd targets being under "posix" in most places, getting lumped together with linux in some other files, but having their own platform_limits.

I'm not going to test it, but this change is more likely to make things better than the opposite. May as well land it.

LGTM

[sugak]

@eugenis: good! Please push this for me. Thank you!

compiler-rt/lib/sanitizer_common/sanitizer_platform_limits_openbsd.h

 extern unsigned timeval_sz;
 extern unsigned uid_t_sz;
 extern unsigned gid_t_sz;
 extern unsigned mbstate_t_sz;
 extern unsigned struct_timezone_sz;
 extern unsigned struct_tms_sz;
 extern unsigned struct_itimerspec_sz;
 extern unsigned struct_sigevent_sz;
+extern unsigned struct_stack_t_sz;
 extern unsigned struct_statfs_sz;
 extern unsigned struct_sockaddr_sz;
 
 extern unsigned struct_rlimit_sz;
 extern unsigned struct_utimbuf_sz;
 extern unsigned struct_timespec_sz;
 
 struct __sanitizer_iocb {

compiler-rt/lib/sanitizer_common/sanitizer_platform_limits_openbsd.cpp

 unsigned struct_utsname_sz = sizeof(struct utsname);
 unsigned struct_stat_sz = sizeof(struct stat);
 unsigned struct_rusage_sz = sizeof(struct rusage);
 unsigned struct_tm_sz = sizeof(struct tm);
 unsigned struct_passwd_sz = sizeof(struct passwd);
 unsigned struct_group_sz = sizeof(struct group);
 unsigned siginfo_t_sz = sizeof(siginfo_t);
 unsigned struct_sigaction_sz = sizeof(struct sigaction);
+unsigned struct_stack_t_sz = sizeof(stack_t);
 unsigned struct_itimerval_sz = sizeof(struct itimerval);
 unsigned pthread_t_sz = sizeof(pthread_t);
 unsigned pthread_mutex_t_sz = sizeof(pthread_mutex_t);
 unsigned pthread_cond_t_sz = sizeof(pthread_cond_t);
 unsigned pid_t_sz = sizeof(pid_t);
 unsigned timeval_sz = sizeof(timeval);
 unsigned uid_t_sz = sizeof(uid_t);
 unsigned gid_t_sz = sizeof(gid_t);

compiler-rt/lib/sanitizer_common/sanitizer_platform_limits_solaris.h

 extern unsigned timeval_sz;
 extern unsigned uid_t_sz;
 extern unsigned gid_t_sz;
 extern unsigned mbstate_t_sz;
 extern unsigned struct_timezone_sz;
 extern unsigned struct_tms_sz;
 extern unsigned struct_itimerspec_sz;
 extern unsigned struct_sigevent_sz;
+extern unsigned struct_stack_t_sz;
 extern unsigned struct_sched_param_sz;
 extern unsigned struct_statfs64_sz;
 extern unsigned struct_statfs_sz;
 extern unsigned struct_sockaddr_sz;
 extern unsigned ucontext_t_sz;
 
 extern unsigned struct_timespec_sz;
 extern unsigned struct_rlimit_sz;

compiler-rt/lib/sanitizer_common/sanitizer_platform_limits_solaris.cpp

namespace __sanitizer {
   unsigned struct_stat_sz = sizeof(struct stat);
   unsigned struct_stat64_sz = sizeof(struct stat64);
   unsigned struct_rusage_sz = sizeof(struct rusage);
   unsigned struct_tm_sz = sizeof(struct tm);
   unsigned struct_passwd_sz = sizeof(struct passwd);
   unsigned struct_group_sz = sizeof(struct group);
   unsigned siginfo_t_sz = sizeof(siginfo_t);
   unsigned struct_sigaction_sz = sizeof(struct sigaction);
+  unsigned struct_stack_t_sz = sizeof(stack_t);
   unsigned struct_itimerval_sz = sizeof(struct itimerval);
   unsigned pthread_t_sz = sizeof(pthread_t);
   unsigned pthread_mutex_t_sz = sizeof(pthread_mutex_t);
   unsigned pthread_cond_t_sz = sizeof(pthread_cond_t);
   unsigned pid_t_sz = sizeof(pid_t);
   unsigned timeval_sz = sizeof(timeval);
   unsigned uid_t_sz = sizeof(uid_t);
   unsigned gid_t_sz = sizeof(gid_t);