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82 lines
2.6 KiB
C++
82 lines
2.6 KiB
C++
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#pragma once
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#if defined(_MSC_VER)
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# if !defined(likely)
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# define likely(x) (x)
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# endif
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# if !defined(unlikely)
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# define unlikely(x) (x)
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# endif
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#else
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# if !defined(likely)
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# define likely(x) (__builtin_expect(!!(x), 1))
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# endif
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# if !defined(unlikely)
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# define unlikely(x) (__builtin_expect(!!(x), 0))
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# endif
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#endif
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#if defined(_MSC_VER)
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# define ALWAYS_INLINE __forceinline
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# define NO_INLINE static __declspec(noinline)
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# define MAY_ALIAS
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#else
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# define ALWAYS_INLINE __attribute__((__always_inline__))
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# define NO_INLINE __attribute__((__noinline__))
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# define MAY_ALIAS __attribute__((__may_alias__))
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#endif
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#if !defined(__x86_64__) && !defined(__aarch64__) && !defined(__PPC__)
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# error "The only supported platforms are x86_64 and AArch64, PowerPC (work in progress)"
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#endif
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/// Check for presence of address sanitizer
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#if !defined(ADDRESS_SANITIZER)
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# if defined(__has_feature)
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# if __has_feature(address_sanitizer)
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# define ADDRESS_SANITIZER 1
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# endif
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# elif defined(__SANITIZE_ADDRESS__)
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# define ADDRESS_SANITIZER 1
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# endif
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#endif
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#if !defined(THREAD_SANITIZER)
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# if defined(__has_feature)
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# if __has_feature(thread_sanitizer)
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# define THREAD_SANITIZER 1
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# endif
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# elif defined(__SANITIZE_THREAD__)
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# define THREAD_SANITIZER 1
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# endif
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#endif
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#if !defined(MEMORY_SANITIZER)
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# if defined(__has_feature)
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# if __has_feature(memory_sanitizer)
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# define MEMORY_SANITIZER 1
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# endif
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# elif defined(__MEMORY_SANITIZER__)
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# define MEMORY_SANITIZER 1
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# endif
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#endif
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/// TODO: Strange enough, there is no way to detect UB sanitizer.
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/// Explicitly allow undefined behaviour for certain functions. Use it as a function attribute.
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/// It is useful in case when compiler cannot see (and exploit) it, but UBSan can.
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/// Example: multiplication of signed integers with possibility of overflow when both sides are from user input.
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#if defined(__clang__)
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# define NO_SANITIZE_UNDEFINED __attribute__((__no_sanitize__("undefined")))
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# define NO_SANITIZE_ADDRESS __attribute__((__no_sanitize__("address")))
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# define NO_SANITIZE_THREAD __attribute__((__no_sanitize__("thread")))
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#else /// It does not work in GCC. GCC 7 cannot recognize this attribute and GCC 8 simply ignores it.
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# define NO_SANITIZE_UNDEFINED
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# define NO_SANITIZE_ADDRESS
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# define NO_SANITIZE_THREAD
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#endif
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/// A macro for suppressing warnings about unused variables or function results.
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/// Useful for structured bindings which have no standard way to declare this.
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#define UNUSED(...) (void)(__VA_ARGS__)
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