[Bug sanitizer/89409] [9 Regression] FAIL: c-c++-common/ubsan/div-by-zero-[67].c

[hjl.tools at gmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=89409

H.J. Lu <hjl.tools at gmail dot com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |NEW
   Last reconfirmed|                            |2019-02-19
   Target Milestone|---                         |9.0
     Ever confirmed|0                           |1

--- Comment #2 from H.J. Lu <hjl.tools at gmail dot com> ---
It is caused by r265665, specially:

@@ -387,18 +388,19 @@ uptr internal_dup2(int oldfd, int newfd) {
 }

 uptr internal_readlink(const char *path, char *buf, uptr bufsize) {
-#if SANITIZER_NETBSD
-  return internal_syscall_ptr(SYSCALL(readlink), path, buf, bufsize);
-#elif SANITIZER_USES_CANONICAL_LINUX_SYSCALLS
-  return internal_syscall(SYSCALL(readlinkat), AT_FDCWD,
-                          (uptr)path, (uptr)buf, bufsize);
+#if SANITIZER_USES_CANONICAL_LINUX_SYSCALLS
+  return internal_syscall(SYSCALL(readlinkat), AT_FDCWD, (uptr)path,
(uptr)buf,+                          bufsize);
+#elif SANITIZER_OPENBSD
+  return internal_syscall(SYSCALL(readlinkat), AT_FDCWD, (uptr)path,
(uptr)buf,
+                          bufsize);
 #else
-  return internal_syscall(SYSCALL(readlink), (uptr)path, (uptr)buf, bufsize);
+  return internal_syscall(SYSCALL(readlink), path, buf, bufsize);
                                              ^^^^^^^^^ These are bad for x32.
 #endif
 }