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Merge branch 'dev' into dev-slice

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Daan 2024-05-18 10:01:31 -07:00
commit 1daa4ea627
5 changed files with 75 additions and 22 deletions
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include/mimalloc/internal.h
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@ -379,10 +379,10 @@ static inline bool mi_mul_overflow(size_t count, size_t size, size_t* total) {
}
#else /* __builtin_umul_overflow is unavailable */
static inline bool mi_mul_overflow(size_t count, size_t size, size_t* total) {
#define MI_MUL_NO_OVERFLOW ((size_t)1 << (4*sizeof(size_t))) // sqrt(SIZE_MAX)
#define MI_MUL_COULD_OVERFLOW ((size_t)1 << (4*sizeof(size_t))) // sqrt(SIZE_MAX)
*total = count * size;
// note: gcc/clang optimize this to directly check the overflow flag
return ((size >= MI_MUL_NO_OVERFLOW || count >= MI_MUL_NO_OVERFLOW) && size > 0 && (SIZE_MAX / size) < count);
return ((size >= MI_MUL_COULD_OVERFLOW || count >= MI_MUL_COULD_OVERFLOW) && size > 0 && (SIZE_MAX / size) < count);
}
#endif