Fix assertion failure in libsanitizer when using glibc 2.31 and later.

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=92154
https://reviews.llvm.org/D69104

Adapted from these upstream revision:

https://gcc.gnu.org/viewcvs/gcc?view=revision&revision=277981
https://gcc.gnu.org/viewcvs/gcc?view=revision&revision=279653

diff --git a/libsanitizer/sanitizer_common/sanitizer_platform_limits_posix.cc b/libsanitizer/sanitizer_common/sanitizer_platform_limits_posix.cc
index 196eb3b3c64..b588e07e5ab 100644
--- a/libsanitizer/sanitizer_common/sanitizer_platform_limits_posix.cc
+++ b/libsanitizer/sanitizer_common/sanitizer_platform_limits_posix.cc
@@ -928,7 +928,11 @@ CHECK_SIZE_AND_OFFSET(ipc_perm, uid);
 CHECK_SIZE_AND_OFFSET(ipc_perm, gid);
 CHECK_SIZE_AND_OFFSET(ipc_perm, cuid);
 CHECK_SIZE_AND_OFFSET(ipc_perm, cgid);
+#if !SANITIZER_LINUX || __GLIBC_PREREQ (2, 31)
+/* glibc 2.30 and earlier provided 16-bit mode field instead of 32-bit
+   on many architectures.  */
 CHECK_SIZE_AND_OFFSET(ipc_perm, mode);
+#endif
 CHECK_SIZE_AND_OFFSET(ipc_perm, __seq);
 
 CHECK_TYPE_SIZE(shmid_ds);
diff --git a/libsanitizer/sanitizer_common/sanitizer_platform_limits_posix.h b/libsanitizer/sanitizer_common/sanitizer_platform_limits_posix.h
index aec950454b3..6d94fc65c28 100644
--- a/libsanitizer/sanitizer_common/sanitizer_platform_limits_posix.h
+++ b/libsanitizer/sanitizer_common/sanitizer_platform_limits_posix.h
@@ -154,20 +154,13 @@ namespace __sanitizer {
     u64 __unused1;
     u64 __unused2;
 #elif defined(__sparc__)
-# if defined(__arch64__)
     unsigned mode;
-    unsigned short __pad1;
-# else
-    unsigned short __pad1;
-    unsigned short mode;
     unsigned short __pad2;
-# endif
     unsigned short __seq;
     unsigned long long __unused1;
     unsigned long long __unused2;
 #else
-    unsigned short mode;
-    unsigned short __pad1;
+    unsigned int mode;
     unsigned short __seq;
     unsigned short __pad2;
 #if defined(__x86_64__) && !defined(_LP64)
></tr></table>
<div class='path'>path: <a href='/guix/log/?id=6e8c6cfafa0e8b9937098ce136a67e4ca4a2155a'>root</a>/<a href='/guix/log/gnu?id=6e8c6cfafa0e8b9937098ce136a67e4ca4a2155a'>gnu</a>/<a href='/guix/log/gnu/services?id=6e8c6cfafa0e8b9937098ce136a67e4ca4a2155a'>services</a>/<a href='/guix/log/gnu/services/rsync.scm?id=6e8c6cfafa0e8b9937098ce136a67e4ca4a2155a'>rsync.scm</a></div><div class='content'><table class='list nowrap'><tr class='nohover'><th class='left'>Age</th><th class='left'>Commit message (<a href='/guix/log/gnu/services/rsync.scm?id=6e8c6cfafa0e8b9937098ce136a67e4ca4a2155a&amp;showmsg=1'>Expand</a>)</th><th class='left'>Author</th></tr>
<tr><td><span title='2023-11-26 23:34:48 +0100'>2023-11-26</span></td><td><a href='/guix/commit/gnu/services/rsync.scm?id=da2dc98185526796fbfb4bc63caf9d70aead9037'>services: rsync: Provide a prettier Shepherd inetd service name.</a><span class='msg-avail'>...<span class='msg-tooltip'>Previously, a default name would be used for transient inetd services,
leading to names such as #{5rjnskb6011jgmfmpgp63jp9mh9nkl20-rsync-3274}#.

* gnu/services/rsync.scm (rsync-shepherd-service): Pass #:service-name-stem.

Change-Id: I4d0a4a01e122c6eeaa85f104b083cf7e8709eac3
</span></span></td><td>Ludovic Courtès</td></tr>
<tr><td><span title='2023-05-18 23:11:19 -0400'>2023-05-18</span></td><td><a href='/guix/commit/gnu/services/rsync.scm?id=d43d8377c741c849ca89dccb07e7d87f82ae88d5'>services: rsync: Use least authority wrapper.</a><span class='msg-avail'>...<span class='msg-tooltip'>* gnu/services/rsync.scm (rsync-shepherd-service) Wrap rsync command in a
least-authority-wrapper.

Reviewed-by: Ludovic Courtès &lt;ludo@gnu.org&gt;
</span></span></td><td>Maxim Cournoyer</td></tr>
<tr><td><span title='2023-05-18 23:10:56 -0400'>2023-05-18</span></td><td><a href='/guix/commit/gnu/services/rsync.scm?id=03e601da49e43ed0235144f32095ce5f58f16275'>services: rsync: Use make-inetd-constructor.</a><span class='msg-avail'>...<span class='msg-tooltip'>* gnu/services/rsync.scm (rsync-shepherd-service): Use make-inetd-constructor
if available in start slot.
* gnu/tests/rsync.scm (run-rsync-test): Delete "PID file" test.

Reviewed-by: Ludovic Courtès &lt;ludo@gnu.org&gt;
</span></span></td><td>Maxim Cournoyer</td></tr>
<tr><td><span title='2023-04-21 16:16:37 +0200'>2023-04-21</span></td><td><a href='/guix/commit/gnu/services/rsync.scm?id=70677d882276ff44bc31d39e378749b976a9ca7d'>services: rsync: Add 'configuration' action.</a><span class='msg-avail'>...<span class='msg-tooltip'>* gnu/services/rsync.scm (rsync-shepherd-service): Add 'actions' field.
</span></span></td><td>Ludovic Courtès</td></tr>