195 lines
5.9 KiB
C
195 lines
5.9 KiB
C
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/*
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* Copyright 2013-present Facebook, Inc.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#pragma once
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/* These definitions are in a separate file so that they
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* may be included from C- as well as C++-based projects. */
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#include <folly/portability/Config.h>
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/**
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* Portable version check.
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*/
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#ifndef __GNUC_PREREQ
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#if defined __GNUC__ && defined __GNUC_MINOR__
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/* nolint */
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#define __GNUC_PREREQ(maj, min) \
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((__GNUC__ << 16) + __GNUC_MINOR__ >= ((maj) << 16) + (min))
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#else
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/* nolint */
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#define __GNUC_PREREQ(maj, min) 0
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#endif
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#endif
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// portable version check for clang
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#ifndef __CLANG_PREREQ
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#if defined __clang__ && defined __clang_major__ && defined __clang_minor__
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/* nolint */
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#define __CLANG_PREREQ(maj, min) \
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((__clang_major__ << 16) + __clang_minor__ >= ((maj) << 16) + (min))
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#else
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/* nolint */
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#define __CLANG_PREREQ(maj, min) 0
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#endif
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#endif
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#if defined(__has_builtin)
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#define FOLLY_HAS_BUILTIN(...) __has_builtin(__VA_ARGS__)
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#else
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#define FOLLY_HAS_BUILTIN(...) 0
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#endif
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#if defined(__has_feature)
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#define FOLLY_HAS_FEATURE(...) __has_feature(__VA_ARGS__)
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#else
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#define FOLLY_HAS_FEATURE(...) 0
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#endif
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/* FOLLY_SANITIZE_ADDRESS is defined to 1 if the current compilation unit
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* is being compiled with ASAN enabled.
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*
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* Beware when using this macro in a header file: this macro may change values
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* across compilation units if some libraries are built with ASAN enabled
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* and some built with ASAN disabled. For instance, this may occur, if folly
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* itself was compiled without ASAN but a downstream project that uses folly is
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* compiling with ASAN enabled.
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*
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* Use FOLLY_ASAN_ENABLED (defined in folly-config.h) to check if folly itself
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* was compiled with ASAN enabled.
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*/
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#if FOLLY_HAS_FEATURE(address_sanitizer) || __SANITIZE_ADDRESS__
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#define FOLLY_SANITIZE_ADDRESS 1
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#endif
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/* Define attribute wrapper for function attribute used to disable
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* address sanitizer instrumentation. Unfortunately, this attribute
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* has issues when inlining is used, so disable that as well. */
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#ifdef FOLLY_SANITIZE_ADDRESS
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#if defined(__clang__)
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#if __has_attribute(__no_sanitize__)
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#define FOLLY_DISABLE_ADDRESS_SANITIZER \
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__attribute__((__no_sanitize__("address"), __noinline__))
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#elif __has_attribute(__no_address_safety_analysis__)
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#define FOLLY_DISABLE_ADDRESS_SANITIZER \
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__attribute__((__no_address_safety_analysis__, __noinline__))
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#elif __has_attribute(__no_sanitize_address__)
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#define FOLLY_DISABLE_ADDRESS_SANITIZER \
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__attribute__((__no_sanitize_address__, __noinline__))
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#endif
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#elif defined(__GNUC__)
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#define FOLLY_DISABLE_ADDRESS_SANITIZER \
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__attribute__((__no_address_safety_analysis__, __noinline__))
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#endif
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#endif
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#ifndef FOLLY_DISABLE_ADDRESS_SANITIZER
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#define FOLLY_DISABLE_ADDRESS_SANITIZER
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#endif
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/* Define a convenience macro to test when thread sanitizer is being used
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* across the different compilers (e.g. clang, gcc) */
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#if FOLLY_HAS_FEATURE(thread_sanitizer) || __SANITIZE_THREAD__
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#define FOLLY_SANITIZE_THREAD 1
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#endif
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/**
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* Define a convenience macro to test when ASAN, UBSAN or TSAN sanitizer are
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* being used
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*/
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#if defined(FOLLY_SANITIZE_ADDRESS) || defined(FOLLY_SANITIZE_THREAD)
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#define FOLLY_SANITIZE 1
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#endif
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#if FOLLY_SANITIZE
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#define FOLLY_DISABLE_UNDEFINED_BEHAVIOR_SANITIZER(...) \
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__attribute__((no_sanitize(__VA_ARGS__)))
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#else
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#define FOLLY_DISABLE_UNDEFINED_BEHAVIOR_SANITIZER(...)
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#endif // FOLLY_SANITIZE
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/**
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* Macro for marking functions as having public visibility.
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*/
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#if defined(__GNUC__)
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#if __GNUC_PREREQ(4, 9)
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#define FOLLY_EXPORT [[gnu::visibility("default")]]
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#else
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#define FOLLY_EXPORT __attribute__((__visibility__("default")))
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#endif
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#else
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#define FOLLY_EXPORT
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#endif
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// noinline
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#ifdef _MSC_VER
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#define FOLLY_NOINLINE __declspec(noinline)
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#elif defined(__clang__) || defined(__GNUC__)
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#define FOLLY_NOINLINE __attribute__((__noinline__))
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#else
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#define FOLLY_NOINLINE
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#endif
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// always inline
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#ifdef _MSC_VER
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#define FOLLY_ALWAYS_INLINE __forceinline
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#elif defined(__clang__) || defined(__GNUC__)
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#define FOLLY_ALWAYS_INLINE inline __attribute__((__always_inline__))
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#else
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#define FOLLY_ALWAYS_INLINE inline
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#endif
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// attribute hidden
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#if _MSC_VER
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#define FOLLY_ATTR_VISIBILITY_HIDDEN
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#elif defined(__clang__) || defined(__GNUC__)
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#define FOLLY_ATTR_VISIBILITY_HIDDEN __attribute__((__visibility__("hidden")))
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#else
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#define FOLLY_ATTR_VISIBILITY_HIDDEN
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#endif
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// An attribute for marking symbols as weak, if supported
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#if FOLLY_HAVE_WEAK_SYMBOLS
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#define FOLLY_ATTR_WEAK __attribute__((__weak__))
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#else
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#define FOLLY_ATTR_WEAK
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#endif
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// Microsoft ABI version (can be overridden manually if necessary)
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#ifndef FOLLY_MICROSOFT_ABI_VER
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#ifdef _MSC_VER
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#define FOLLY_MICROSOFT_ABI_VER _MSC_VER
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#endif
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#endif
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// These functions are defined by the TSAN runtime library and enable
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// annotating mutexes for TSAN.
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extern "C" FOLLY_ATTR_WEAK void
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AnnotateRWLockCreate(const char* f, int l, const volatile void* addr);
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extern "C" FOLLY_ATTR_WEAK void
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AnnotateRWLockCreateStatic(const char* f, int l, const volatile void* addr);
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extern "C" FOLLY_ATTR_WEAK void
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AnnotateRWLockDestroy(const char* f, int l, const volatile void* addr);
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extern "C" FOLLY_ATTR_WEAK void
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AnnotateRWLockAcquired(const char* f, int l, const volatile void* addr, long w);
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extern "C" FOLLY_ATTR_WEAK void
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AnnotateRWLockReleased(const char* f, int l, const volatile void* addr, long w);
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extern "C" FOLLY_ATTR_WEAK void AnnotateBenignRaceSized(
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const char* f,
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int l,
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const volatile void* addr,
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long size,
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const char* desc);
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