X-Git-Url: http://plrg.eecs.uci.edu/git/?a=blobdiff_plain;f=folly%2FCPortability.h;h=3b362d2a885b96781ea4a7bbf000574694cb3387;hb=a674aa6cee470969ddecd340154002cf1d3efc1c;hp=0989cbc920fb745a07c6e4dee2afa7c72d85b911;hpb=9b7138e49c6c545f09a1f016df5b26fd05d13d23;p=folly.git

diff --git a/folly/CPortability.h b/folly/CPortability.h
index 0989cbc9..3b362d2a 100644
--- a/folly/CPortability.h
+++ b/folly/CPortability.h
@@ -33,15 +33,33 @@
 # endif
 #endif
 
+// portable version check for clang
+#ifndef __CLANG_PREREQ
+# if defined __clang__ && defined __clang_major__ && defined __clang_minor__
+/* nolint */
+#  define __CLANG_PREREQ(maj, min) \
+    ((__clang_major__ << 16) + __clang_minor__ >= ((maj) << 16) + (min))
+# else
+/* nolint */
+#  define __CLANG_PREREQ(maj, min) 0
+# endif
+#endif
+
+#if defined(__has_builtin)
+#define FOLLY_HAS_BUILTIN(...) __has_builtin(__VA_ARGS__)
+#else
+#define FOLLY_HAS_BUILTIN(...) 0
+#endif
+
+#if defined(__has_feature)
+#define FOLLY_HAS_FEATURE(...) __has_feature(__VA_ARGS__)
+#else
+#define FOLLY_HAS_FEATURE(...) 0
+#endif
+
 /* Define a convenience macro to test when address sanitizer is being used
  * across the different compilers (e.g. clang, gcc) */
-#if defined(__clang__)
-# if __has_feature(address_sanitizer)
-#  define FOLLY_SANITIZE_ADDRESS 1
-# endif
-#elif defined (__GNUC__) && \
-      (((__GNUC__ == 4) && (__GNUC_MINOR__ >= 8)) || (__GNUC__ >= 5)) && \
-      __SANITIZE_ADDRESS__
+#if FOLLY_HAS_FEATURE(address_sanitizer) || __SANITIZE_ADDRESS__
 # define FOLLY_SANITIZE_ADDRESS 1
 #endif
 
@@ -71,14 +89,19 @@
 
 /* Define a convenience macro to test when thread sanitizer is being used
  * across the different compilers (e.g. clang, gcc) */
-#if defined(__clang__)
-# if __has_feature(thread_sanitizer)
-#  define FOLLY_SANITIZE_THREAD 1
-# endif
-#elif defined(__GNUC__) && __SANITIZE_THREAD__
+#if FOLLY_HAS_FEATURE(thread_sanitizer) || __SANITIZE_THREAD__
 # define FOLLY_SANITIZE_THREAD 1
 #endif
 
+/**
+ * Define a convenience macro to test when ASAN, UBSAN or TSAN sanitizer are
+ * being used
+ */
+#if defined(FOLLY_SANITIZE_ADDRESS) || defined(FOLLY_SANITIZE_THREAD) || \
+    defined(UNDEFINED_SANITIZER)
+#define FOLLY_SANITIZE 1
+#endif
+
 /**
  * ASAN/MSAN/TSAN define pre-processor symbols:
  * ADDRESS_SANITIZER/MEMORY_SANITIZER/THREAD_SANITIZER.
@@ -90,10 +113,10 @@
  * used as folly whitelists some functions.
  */
 #if UNDEFINED_SANITIZER
-# define FOLLY_DISABLE_UNDEFINED_BEHAVIOR_SANITIZER(x) \
-    __attribute__((no_sanitize(x)))
+#define FOLLY_DISABLE_UNDEFINED_BEHAVIOR_SANITIZER(...) \
+  __attribute__((no_sanitize(__VA_ARGS__)))
 #else
-# define FOLLY_DISABLE_UNDEFINED_BEHAVIOR_SANITIZER(x)
+#define FOLLY_DISABLE_UNDEFINED_BEHAVIOR_SANITIZER(...)
 #endif // UNDEFINED_SANITIZER
 
 /**
@@ -126,3 +149,12 @@
 #else
 # define FOLLY_ALWAYS_INLINE inline
 #endif
+
+// attribute hidden
+#if _MSC_VER
+#define FOLLY_ATTR_VISIBILITY_HIDDEN
+#elif defined(__clang__) || defined(__GNUC__)
+#define FOLLY_ATTR_VISIBILITY_HIDDEN __attribute__((__visibility__("hidden")))
+#else
+#define FOLLY_ATTR_VISIBILITY_HIDDEN
+#endif