From 75003cdd23c310ec385344e8040d490e8dd6d2be Mon Sep 17 00:00:00 2001
From: Jakub Jelinek <jakub@redhat.com>
Date: Fri, 20 Dec 2019 17:58:35 +0100
Subject: [PATCH] backport: re PR sanitizer/92154 (new glibc breaks arm
 bootstrap due to libsanitizer)

	Backported from mainline
	2019-11-26  Jakub Jelinek  <jakub@redhat.com>

	PR sanitizer/92154
	* sanitizer_common/sanitizer_platform_limits_posix.h: Cherry-pick
	llvm-project revision 947f9692440836dcb8d88b74b69dd379d85974ce.
	* sanitizer_common/sanitizer_platform_limits_posix.cc: Likewise.

From-SVN: r279653
---
 libsanitizer/ChangeLog                            | 10 ++++++++++
 .../sanitizer_platform_limits_posix.cc            |  9 +++------
 .../sanitizer_platform_limits_posix.h             | 15 +--------------
 3 files changed, 14 insertions(+), 20 deletions(-)

diff --git a/libsanitizer/sanitizer_common/sanitizer_platform_limits_posix.cc b/libsanitizer/sanitizer_common/sanitizer_platform_limits_posix.cc
index 06a605ff4670..d823a12190c0 100644
--- a/libsanitizer/sanitizer_common/sanitizer_platform_limits_posix.cc
+++ b/libsanitizer/sanitizer_common/sanitizer_platform_limits_posix.cc
@@ -1156,12 +1156,9 @@ 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)) && \
-    !defined(__arm__)
-/* On aarch64 glibc 2.20 and earlier provided incorrect mode field.  */
-/* On Arm glibc 2.31 and later provide a different mode field, this field is
-   never used by libsanitizer so we can simply ignore this assert for all glibc
-   versions.  */
+#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 73af92af1e8f..6a673a7c9959 100644
--- a/libsanitizer/sanitizer_common/sanitizer_platform_limits_posix.h
+++ b/libsanitizer/sanitizer_common/sanitizer_platform_limits_posix.h
@@ -211,26 +211,13 @@ 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;
-#elif defined(__mips__) || defined(__aarch64__) || defined(__s390x__)
-    unsigned int mode;
-    unsigned short __seq;
-    unsigned short __pad1;
-    unsigned long __unused1;
-    unsigned long __unused2;
 #else
-    unsigned short mode;
-    unsigned short __pad1;
+    unsigned int mode;
     unsigned short __seq;
     unsigned short __pad2;
 #if defined(__x86_64__) && !defined(_LP64)
