[compiler-rt] [compiler-rt] Avoid defining _KERNEL on FreeBSD (PR #143116)

[via llvm-commits]

llvmbot wrote:


<!--LLVM PR SUMMARY COMMENT-->

@llvm/pr-subscribers-compiler-rt-sanitizer

Author: Jessica Clarke (jrtc27)

<details>
<summary>Changes</summary>

Defining _KERNEL is a hack that can cause all kinds of breakage if
you're not careful, since the actual environment is not a kernel build,
and so should be avoided. Since FreeBSD 12 (MFC'ed for 11.3) you can
define _WANT_SYSVSHM_INTERNALS to expose shminfo (and various other
things) to userspace, so use that instead.


---
Full diff: https://github.com/llvm/llvm-project/pull/143116.diff


1 Files Affected:

- (modified) compiler-rt/lib/sanitizer_common/sanitizer_platform_limits_freebsd.cpp (+1-2) 


``````````diff
diff --git a/compiler-rt/lib/sanitizer_common/sanitizer_platform_limits_freebsd.cpp b/compiler-rt/lib/sanitizer_common/sanitizer_platform_limits_freebsd.cpp
index 4940062eeae47..8e83ef9ae61df 100644
--- a/compiler-rt/lib/sanitizer_common/sanitizer_platform_limits_freebsd.cpp
+++ b/compiler-rt/lib/sanitizer_common/sanitizer_platform_limits_freebsd.cpp
@@ -87,9 +87,8 @@
 #include <wchar.h>
 #include <wordexp.h>
 
-#define _KERNEL  // to declare 'shminfo' structure
+#define _WANT_SYSVSHM_INTERNALS  // to declare 'shminfo' structure
 #include <sys/shm.h>
-#undef _KERNEL
 
 #undef IOC_DIRMASK
 

``````````

</details>


https://github.com/llvm/llvm-project/pull/143116