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mte: use tag 0 for freed slots, stop reserving tag 15

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Dmitry Muhomor 2024-01-23 19:50:26 +02:00 • committed by Daniel Micay
parent 3c1f40aff0
commit 7268189933
4 changed files with 17 additions and 19 deletions
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8
androidtest/memtag/memtag_test.cc
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@ -47,9 +47,9 @@ void *set_pointer_tag(void *ptr, u8 tag) {
// This test checks that slab slot allocation uses tag that is distint from tags of its neighbors
// and from the tag of the previous allocation that used the same slot
void tag_distinctness() {
// 0 and 15 are reserved
// tag 0 is reserved
const int min_tag = 1;
const int max_tag = 14;
const int max_tag = 0xf;
struct SizeClass {
int size;
@ -148,8 +148,8 @@ void tag_distinctness() {
}
}
// check that all of the tags were used, except reserved ones
assert(seen_tags == (0xffff & ~(1 << 0 | 1 << 15)));
// check that all of the tags were used, except for the reserved tag 0
assert(seen_tags == (0xffff & ~(1 << 0)));
printf("size_class\t%i\t" "tdc_left %i\t" "tdc_right %i\t" "tdc_prev_alloc %i\n",
sc.size, left_neighbor_tdc_cnt, right_neighbor_tdc_cnt, prev_alloc_tdc_cnt);