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110 lines
3.4 KiB
C
110 lines
3.4 KiB
C
/*
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* Copyright 2016 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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/**
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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) ((__GNUC__ << 16) + __GNUC_MINOR__ >= \
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((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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/* Define a convenience macro to test when address sanitizer is being used
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* across the different compilers (e.g. clang, gcc) */
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#if defined(__clang__)
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# if __has_feature(address_sanitizer)
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# define FOLLY_SANITIZE_ADDRESS 1
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# endif
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#elif defined (__GNUC__) && \
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(((__GNUC__ == 4) && (__GNUC_MINOR__ >= 8)) || (__GNUC__ >= 5)) && \
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__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 defined(__clang__)
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# if __has_feature(thread_sanitizer)
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# define FOLLY_SANITIZE_THREAD 1
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# endif
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#elif defined(__GNUC__) && __SANITIZE_THREAD__
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# define FOLLY_SANITIZE_THREAD 1
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#endif
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/**
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* ASAN/MSAN/TSAN define pre-processor symbols:
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* ADDRESS_SANITIZER/MEMORY_SANITIZER/THREAD_SANITIZER.
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*
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* UBSAN doesn't define anything and makes it hard to
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* conditionally compile.
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*
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* The build system should define UNDEFINED_SANITIZER=1 when UBSAN is
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* used as folly whitelists some functions.
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*/
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#if UNDEFINED_SANITIZER
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# define UBSAN_DISABLE(x) __attribute__((no_sanitize(x)))
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#else
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# define UBSAN_DISABLE(x)
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#endif // UNDEFINED_SANITIZER
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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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