mirror of
https://github.com/facebook/rocksdb.git
synced 2024-11-26 07:30:54 +00:00
e67ee46642
Summary: This function uses racing reads for heuristic performance improvement. My change in https://github.com/facebook/rocksdb/issues/11792 only worked for clang, not gcc, and gcc does not accurately handle TSAN suppressions. I would have to mark much more code as suppressed than I want to. So I've taken a different approach: TSAN build does not use the racing reads but substitutes random results, as an extra test that a "correct" value is not needed for correct overall behavior. Pull Request resolved: https://github.com/facebook/rocksdb/pull/11806 Test Plan: manual TSAN builds & tests with cache_bench Reviewed By: ajkr Differential Revision: D49100115 Pulled By: pdillinger fbshipit-source-id: d6d0dfb796d710b953212dd3fc171b6e88fadea1
98 lines
2.9 KiB
C++
98 lines
2.9 KiB
C++
// Copyright (c) 2011-present, Facebook, Inc. All rights reserved.
|
|
// This source code is licensed under both the GPLv2 (found in the
|
|
// COPYING file in the root directory) and Apache 2.0 License
|
|
// (found in the LICENSE.Apache file in the root directory).
|
|
|
|
#pragma once
|
|
|
|
#ifndef FALLTHROUGH_INTENDED
|
|
#if defined(__clang__)
|
|
#define FALLTHROUGH_INTENDED [[clang::fallthrough]]
|
|
#elif defined(__GNUC__) && __GNUC__ >= 7
|
|
#define FALLTHROUGH_INTENDED [[gnu::fallthrough]]
|
|
#else
|
|
#define FALLTHROUGH_INTENDED \
|
|
do { \
|
|
} while (0)
|
|
#endif
|
|
#endif
|
|
|
|
#define DECLARE_DEFAULT_MOVES(Name) \
|
|
Name(Name&&) noexcept = default; \
|
|
Name& operator=(Name&&) = default
|
|
|
|
// ASAN (Address sanitizer)
|
|
|
|
#if defined(__clang__)
|
|
#if defined(__has_feature)
|
|
#if __has_feature(address_sanitizer)
|
|
#define MUST_FREE_HEAP_ALLOCATIONS 1
|
|
#endif // __has_feature(address_sanitizer)
|
|
#endif // defined(__has_feature)
|
|
#else // __clang__
|
|
#ifdef __SANITIZE_ADDRESS__
|
|
#define MUST_FREE_HEAP_ALLOCATIONS 1
|
|
#endif // __SANITIZE_ADDRESS__
|
|
#endif // __clang__
|
|
|
|
#ifdef ROCKSDB_VALGRIND_RUN
|
|
#define MUST_FREE_HEAP_ALLOCATIONS 1
|
|
#endif // ROCKSDB_VALGRIND_RUN
|
|
|
|
// Coding guidelines say to avoid static objects with non-trivial destructors,
|
|
// because it's easy to cause trouble (UB) in static destruction. This
|
|
// macro makes it easier to define static objects that are normally never
|
|
// destructed, except are destructed when running under ASAN. This should
|
|
// avoid unexpected, unnecessary destruction behavior in production.
|
|
// Note that constructor arguments can be provided as in
|
|
// STATIC_AVOID_DESTRUCTION(Foo, foo)(arg1, arg2);
|
|
#ifdef MUST_FREE_HEAP_ALLOCATIONS
|
|
#define STATIC_AVOID_DESTRUCTION(Type, name) static Type name
|
|
constexpr bool kMustFreeHeapAllocations = true;
|
|
#else
|
|
#define STATIC_AVOID_DESTRUCTION(Type, name) static Type& name = *new Type
|
|
constexpr bool kMustFreeHeapAllocations = false;
|
|
#endif
|
|
|
|
// TSAN (Thread sanitizer)
|
|
|
|
// For simplicity, standardize on the GCC define
|
|
#if defined(__clang__)
|
|
#if defined(__has_feature) && __has_feature(thread_sanitizer)
|
|
#define __SANITIZE_THREAD__ 1
|
|
#endif // __has_feature(thread_sanitizer)
|
|
#endif // __clang__
|
|
|
|
#ifdef __SANITIZE_THREAD__
|
|
#define TSAN_SUPPRESSION __attribute__((no_sanitize("thread")))
|
|
#else
|
|
#define TSAN_SUPPRESSION
|
|
#endif // TSAN_SUPPRESSION
|
|
|
|
// Compile-time CPU feature testing compatibility
|
|
//
|
|
// A way to be extra sure these defines have been included.
|
|
#define ASSERT_FEATURE_COMPAT_HEADER() /* empty */
|
|
|
|
// MSVC doesn't support the same defines that gcc and clang provide
|
|
// but does some like __AVX__. Here we can infer some features from others.
|
|
#ifdef __AVX__
|
|
#define __SSE4_2__ 1
|
|
#define __PCLMUL__ 1
|
|
#endif // __AVX__
|
|
|
|
// A way to disable PCLMUL
|
|
#ifdef NO_PCLMUL
|
|
#undef __PCLMUL__
|
|
#endif
|
|
|
|
// popcnt is generally implied by SSE4.2
|
|
#if defined(__SSE4_2__)
|
|
#define __POPCNT__ 1
|
|
#endif
|
|
|
|
// A way to disable POPCNT
|
|
#ifdef NO_POPCNT
|
|
#undef __POPCNT__
|
|
#endif
|