Merge "Turn off integer overflow UBSAN checks for hash functions" into main (5c636e3b) · Commits · e / devices / smdk4412 / android_frameworks_native

include/ftl/details/hash.h

+4 −0

Original line number	Diff line number	Diff line
		@@ -43,6 +43,7 @@ constexpr std::uint64_t shift_mix(std::uint64_t v) {
		return v ^ (v >> 47);
		}

		__attribute__((no_sanitize("unsigned-integer-overflow")))
		constexpr std::uint64_t hash_length_16(std::uint64_t u, std::uint64_t v) {
		constexpr std::uint64_t kPrime = 0x9ddfea08eb382d69ull;
		auto a = (u ^ v) * kPrime;
		@@ -58,6 +59,7 @@ constexpr std::uint64_t kPrime1 = 0xb492b66fbe98f273ull;
		constexpr std::uint64_t kPrime2 = 0x9ae16a3b2f90404full;
		constexpr std::uint64_t kPrime3 = 0xc949d7c7509e6557ull;

		__attribute__((no_sanitize("unsigned-integer-overflow")))
		inline std::uint64_t hash_length_0_to_16(const char* str, std::uint64_t length) {
		if (length > 8) {
		const auto a = read_unaligned(str);
		@@ -80,6 +82,7 @@ inline std::uint64_t hash_length_0_to_16(const char* str, std::uint64_t length)
		return kPrime2;
		}

		__attribute__((no_sanitize("unsigned-integer-overflow")))
		inline std::uint64_t hash_length_17_to_32(const char* str, std::uint64_t length) {
		const auto a = read_unaligned(str) * kPrime1;
		const auto b = read_unaligned(str + 8);
		@@ -89,6 +92,7 @@ inline std::uint64_t hash_length_17_to_32(const char* str, std::uint64_t length)
		a + rotate(b ^ kPrime3, 20) - c + length);
		}

		__attribute__((no_sanitize("unsigned-integer-overflow")))
		inline std::uint64_t hash_length_33_to_64(const char* str, std::uint64_t length) {
		auto z = read_unaligned(str + 24);
		auto a = read_unaligned(str) + (length + read_unaligned(str + length - 16)) * kPrime0;