[PATCH] D51538: Add glibc_prereq to platform limits mmsghdr

[Brian Cain via Phabricator via llvm-commits]

bcain created this revision.
bcain added reviewers: vitalybuka, hans.
Herald added subscribers: Sanitizers, krytarowski, kubamracek, srhines.

sendmmsg requires glibc >= 2.14.

Fixes PR38589.


Repository:
  rCRT Compiler Runtime

https://reviews.llvm.org/D51538

Files:
  lib/sanitizer_common/sanitizer_platform_limits_posix.cc


Index: lib/sanitizer_common/sanitizer_platform_limits_posix.cc
===================================================================
--- lib/sanitizer_common/sanitizer_platform_limits_posix.cc
+++ lib/sanitizer_common/sanitizer_platform_limits_posix.cc
@@ -1037,7 +1037,11 @@
 CHECK_SIZE_AND_OFFSET(cmsghdr, cmsg_level);
 CHECK_SIZE_AND_OFFSET(cmsghdr, cmsg_type);
 
-#if SANITIZER_LINUX && (!defined(__ANDROID__) || __ANDROID_API__ >= 21)
+#ifndef __GLIBC_PREREQ
+#define __GLIBC_PREREQ(x, y) 0
+#endif
+
+#if SANITIZER_LINUX && (!defined(__ANDROID__) || __ANDROID_API__ >= 21) && __GLIBC_PREREQ (2, 14)
 CHECK_TYPE_SIZE(mmsghdr);
 CHECK_SIZE_AND_OFFSET(mmsghdr, msg_hdr);
 CHECK_SIZE_AND_OFFSET(mmsghdr, msg_len);
@@ -1078,9 +1082,6 @@
 // Can't write checks for sa_handler and sa_sigaction due to them being
 // preprocessor macros.
 CHECK_STRUCT_SIZE_AND_OFFSET(sigaction, sa_mask);
-#ifndef __GLIBC_PREREQ
-#define __GLIBC_PREREQ(x, y) 0
-#endif
 #if !defined(__s390x__) || __GLIBC_PREREQ (2, 20)
 // On s390x glibc 2.19 and earlier sa_flags was unsigned long, and sa_resv
 // didn't exist.


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