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Commit 93926f65 authored by Yi Kong's avatar Yi Kong
Browse files

Turn off integer overflow UBSAN checks for hash functions 

These functions intentionally overflows integers. The upcoming compiler
update, clang-r522817, will start complaining about these overflows.

Test: boot with new compiler
Bug: 325934863
Change-Id: I5e83a55e880f4e78a7de5a7b01ee99e64f601ca7
parent 315a0f14

libs/ui/DisplayIdentification.cpp

+3 −1
Original line number Diff line number Diff line
@@ -47,6 +47,7 @@ uint64_t shiftMix(uint64_t val) { 
    return val ^ (val >> 47);

}



__attribute__((no_sanitize("unsigned-integer-overflow")))

uint64_t hash64Len16(uint64_t u, uint64_t v) {

    constexpr uint64_t kMul = 0x9ddfea08eb382d69;

    uint64_t a = (u ^ v) * kMul;
@@ -57,6 +58,7 @@ uint64_t hash64Len16(uint64_t u, uint64_t v) { 
    return b;

}



__attribute__((no_sanitize("unsigned-integer-overflow")))

uint64_t hash64Len0To16(const char* s, uint64_t len) {

    constexpr uint64_t k2 = 0x9ae16a3b2f90404f;

    constexpr uint64_t k3 = 0xc949d7c7509e6557;