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stronger encoding of free lists using two keys per page

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This commit is contained in:
daan 2019-12-27 23:33:50 -08:00
parent ce02986d56
commit e3391d9a53
8 changed files with 83 additions and 50 deletions
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2
src/random.c
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@ -231,9 +231,9 @@ void _mi_random_init(mi_random_ctx_t* ctx) {
if (!os_random_buf(key, sizeof(key))) {
// if we fail to get random data from the OS, we fall back to a
// weak random source based on the current time
_mi_warning_message("unable to use secure randomness\n");
uintptr_t x = os_random_weak(0);
for (size_t i = 0; i < 8; i++) { // key is eight 32-bit words.
_mi_warning_message("unable to use secure randomness\n");
x = _mi_random_shuffle(x);
((uint32_t*)key)[i] = (uint32_t)x;
}