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 97eae3fc7bc..4089d4695e2 100644
--- a/libsanitizer/sanitizer_common/sanitizer_platform_limits_posix.cc
+++ b/libsanitizer/sanitizer_common/sanitizer_platform_limits_posix.cc
@@ -1145,8 +1145,9 @@ 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 !defined(__aarch64__) || !SANITIZER_LINUX || __GLIBC_PREREQ (2, 21)
-/* On aarch64 glibc 2.20 and earlier provided incorrect mode field.  */
+#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
 
diff --git a/libsanitizer/sanitizer_common/sanitizer_platform_limits_posix.h b/libsanitizer/sanitizer_common/sanitizer_platform_limits_posix.h
index c139322839a..7c3c2d866e5 100644
--- a/libsanitizer/sanitizer_common/sanitizer_platform_limits_posix.h
+++ b/libsanitizer/sanitizer_common/sanitizer_platform_limits_posix.h
@@ -211,20 +211,13 @@ namespace __sanitizer {
     unsigned long __unused1;
     unsigned long __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)

p</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/.mailmap?id=59d2a64002c91133403053085ed2668a690a1560&amp;showmsg=1'>Expand</a>)</th><th class='left'>Author</th></tr>
<tr><td><span title='2023-08-16 22:22:06 +0200'>2023-08-16</span></td><td><a href='/guix/commit/.mailmap?id=fce924708c31c09a1b438ae7e8b83d39c492be9a'>Update email addresses for Juliana Sims.</a><span class='msg-avail'>...<span class='msg-tooltip'>* .mailmap: Add an entry for Juliana.
* gnu/packages/admin.scm, gnu/packages/audio.scm,
gnu/packages/build-tools.scm, gnu/packages/scheme.scm: Update Juliana's email.

Signed-off-by: Ludovic Courtès &lt;ludo@gnu.org&gt;
</span></span></td><td>Juliana Sims</td></tr>
<tr><td><span title='2022-01-11 14:48:00 -0500'>2022-01-11</span></td><td><a href='/guix/commit/.mailmap?id=7f779286df7e8636d901f4734501902cc934a72f'>Update mailmap.</a><span class='msg-avail'>...<span class='msg-tooltip'>* .mailmap: Add entry for Zheng Junjie.
</span></span></td><td>Leo Famulari</td></tr>
<tr><td><span title='2021-11-06 16:03:43 +0100'>2021-11-06</span></td><td><a href='/guix/commit/.mailmap?id=567c4f4495fd1681bc6bd1ca3e9d1a87e120ac61'>Update mailmap and copyright assignments for Liliana Marie Prikler.</a><span class='msg-avail'>...<span class='msg-tooltip'>Use full names everywhere.

* .mailmap: Use full name for Liliana Marie Prikler.
* gnu/packages/zig.scm: Likewise.
</span></span></td><td>Liliana Marie Prikler</td></tr>
<tr><td><span title='2021-09-06 12:15:57 +0200'>2021-09-06</span></td><td><a href='/guix/commit/.mailmap?id=7158f8e4e9f81dbe004789018dcf06a5fe87d602'>Update mailmap.</a><span class='msg-avail'>...<span class='msg-tooltip'>* .mailmap: Add entry for Liliana Marie Prikler.
</span></span></td><td>Liliana Marie Prikler</td></tr>
<tr><td><span title='2021-09-04 12:25:17 +0200'>2021-09-04</span></td><td><a href='/guix/commit/.mailmap?id=1fd0bf60ea261fac426052386029ead0ac68cad1'>Update mailmap.</a><span class='msg-avail'>...<span class='msg-tooltip'>* .mailmap: Alias all my contributions to the same identity.
</span></span></td><td>Marius Bakke</td></tr>
<tr><td><span title='2021-07-27 12:34:56 -0400'>2021-07-27</span></td><td><a href='/guix/commit/.mailmap?id=c0e6e8d25e3750a35bebc80469ee86e7826bd769'>Update mailmap.</a><span class='msg-avail'>...<span class='msg-tooltip'>* .mailmap: Add entry for Christine Lemmer-Webber.
</span></span></td><td>Leo Famulari</td></tr>
<tr><td><span title='2021-07-08 09:48:22 +0200'>2021-07-08</span></td><td><a href='/guix/commit/.mailmap?id=0a04c25482c4d848a6a29711fccf5682319e26aa'>mailmap: Update entries for Matthew James Kraai.</a><span class='msg-avail'>...<span class='msg-tooltip'>* .mailmap: Change name for Matthew James Kraai.
* gnu/packages/lisp-xyz.scm, gnu/packages/python-xyz.scm,
gnu/packages/rust.scm: Likewise.

Signed-off-by: Nicolas Goaziou &lt;mail@nicolasgoaziou.fr&gt;
</span></span></td><td>Matthew James Kraai</td></tr>
<tr><td><span title='2021-06-23 22:29:23 -0500'>2021-06-23</span></td><td><a href='/guix/commit/.mailmap?id=6d388103a4ed8f14f1ac6ac7a2ff22c5fa6b8cd4'>gnu: Add Sollya.</a><span class='msg-avail'>...<span class='msg-tooltip'>* gnu/packages/algebra.scm (sollya): New variable.
* .mailmap: Adjust "proper email" for `git commit`.
</span></span></td><td>Eric Bavier</td></tr>
<tr><td><span title='2021-04-21 18:02:27 -0400'>2021-04-21</span></td><td><a href='/guix/commit/.mailmap?id=449844474da86b5f10a4c5e4f1744e1e3a716d6e'>Update email address for Kei.</a><span class='msg-avail'>...<span class='msg-tooltip'>* .mailmap: Remove obsolete email for Kei.
</span></span></td><td>Kei Kebreau</td></tr>