/*
- * Copyright 2014 Facebook, Inc.
+ * Copyright 2016 Facebook, Inc.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* limitations under the License.
*/
-#ifndef CPORTABILITY_H
-#define CPORTABILITY_H
+#pragma once
/* These definitions are in a separate file so that they
* may be included from C- as well as C++-based projects. */
+/**
+ * Portable version check.
+ */
+#ifndef __GNUC_PREREQ
+# if defined __GNUC__ && defined __GNUC_MINOR__
+/* nolint */
+# define __GNUC_PREREQ(maj, min) ((__GNUC__ << 16) + __GNUC_MINOR__ >= \
+ ((maj) << 16) + (min))
+# else
+/* nolint */
+# define __GNUC_PREREQ(maj, min) 0
+# endif
+#endif
+
/* Define a convenience macro to test when address sanitizer is being used
* across the different compilers (e.g. clang, gcc) */
#if defined(__clang__)
* has issues when inlining is used, so disable that as well. */
#ifdef FOLLY_SANITIZE_ADDRESS
# if defined(__clang__)
-# if __has_attribute(__no_address_safety_analysis__)
+# if __has_attribute(__no_sanitize__)
+# define FOLLY_DISABLE_ADDRESS_SANITIZER \
+ __attribute__((__no_sanitize__("address"), __noinline__))
+# elif __has_attribute(__no_address_safety_analysis__)
# define FOLLY_DISABLE_ADDRESS_SANITIZER \
__attribute__((__no_address_safety_analysis__, __noinline__))
# elif __has_attribute(__no_sanitize_address__)
# define FOLLY_DISABLE_ADDRESS_SANITIZER
#endif
+/* 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__
+# define FOLLY_SANITIZE_THREAD 1
+#endif
+
+/**
+ * ASAN/MSAN/TSAN define pre-processor symbols:
+ * ADDRESS_SANITIZER/MEMORY_SANITIZER/THREAD_SANITIZER.
+ *
+ * UBSAN doesn't define anything and makes it hard to
+ * conditionally compile.
+ *
+ * The build system should define UNDEFINED_SANITIZER=1 when UBSAN is
+ * used as folly whitelists some functions.
+ */
+#if UNDEFINED_SANITIZER
+# define UBSAN_DISABLE(x) __attribute__((no_sanitize(x)))
+#else
+# define UBSAN_DISABLE(x)
+#endif // UNDEFINED_SANITIZER
+
+/**
+ * Macro for marking functions as having public visibility.
+ */
+#if defined(__GNUC__)
+# if __GNUC_PREREQ(4, 9)
+# define FOLLY_EXPORT [[gnu::visibility("default")]]
+# else
+# define FOLLY_EXPORT __attribute__((__visibility__("default")))
+# endif
+#else
+# define FOLLY_EXPORT
#endif