Introduce SANITIZER_NETBSD in sanitizer_platform.h

Summary:
Add defines for new NetBSD: SANITIZER_NETBSD,
it will be used across the codebase for sanitizers.

NetBSD is a POSIX-like platform, add it to SANITIZER_POSIX.

Part of the code inspired by the original work on libsanitizer in GCC 5.4 by Christos Zoulas.

Sponsored by <The NetBSD Foundation>

Reviewers: joerg, kcc, dim, alekseyshl, filcab, eugenis, vitalybuka

Reviewed By: kcc

Subscribers: kubamracek, #sanitizers

Tags: #sanitizers

Differential Revision: https://reviews.llvm.org/D35467

llvm-svn: 308216

Author: krytarowski

compiler-rt/lib/sanitizer_common/sanitizer_platform.h

@@ -13,7 +13,7 @@
 #ifndef SANITIZER_PLATFORM_H
 #define SANITIZER_PLATFORM_H
 
-#if !defined(__linux__) && !defined(__FreeBSD__) && \
+#if !defined(__linux__) && !defined(__FreeBSD__) && !defined(__NetBSD__) \
   !defined(__APPLE__) && !defined(_WIN32)
 # error "This operating system is not supported"
 #endif
@@ -30,6 +30,12 @@
 # define SANITIZER_FREEBSD 0
 #endif
 
+#if defined(__NetBSD__)
+# define SANITIZER_NETBSD 1
+#else
+# define SANITIZER_NETBSD 0
+#endif
+
 #if defined(__APPLE__)
 # define SANITIZER_MAC     1
 # include <TargetConditionals.h>
@@ -79,7 +85,8 @@
 # define SANITIZER_ANDROID 0
 #endif
 
-#define SANITIZER_POSIX (SANITIZER_FREEBSD || SANITIZER_LINUX || SANITIZER_MAC)
+#define SANITIZER_POSIX \
+  (SANITIZER_FREEBSD || SANITIZER_LINUX || SANITIZER_MAC || SANITIZER_NETBSD)
 
 #if __LP64__ || defined(_WIN64)
 #  define SANITIZER_WORDSIZE 64