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xo-alloc2: utest: check guard bytes

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This commit is contained in:
Roland Conybeare 2025-12-16 23:00:00 -05:00
commit bc1f669ec7
3 changed files with 104 additions and 2 deletions
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41
xo-alloc2/utest/Collector.test.cpp
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@ -187,6 +187,47 @@ namespace xo {
utest::AllocUtil::random_allocs(25, true, &rng, x1alloc);
}
TEST_CASE("collector-x1-alloc2", "[alloc2][gc]")
{
ArenaConfig arena_cfg = { .name_ = "_test_unused",
.size_ = 4*1024*1024,
.store_header_flag_ = true,
.header_ = AllocHeaderConfig(8 /*guard_z*/,
0xfd /*guard-byte*/,
0 /*tseq-bits*/,
0 /*age-bits*/,
16 /*size-bits*/), };
/* collector with one generation collapses to a non-generational copying collector */
CollectorConfig cfg = { .arena_config_ = arena_cfg,
.n_generation_ = 1,
.gc_trigger_v_ = {{64*1024, 0, 0, 0,
0, 0, 0, 0,
0, 0, 0, 0,
0, 0, 0, 0}} };
/* X1 allocator+collector */
DX1Collector x1state = DX1Collector{cfg};
/* typed collector i/face */
auto x1gc = with_facet<ACollector>::mkobj(&x1state);
/* typed allocator i/face */
auto x1alloc = with_facet<AAllocator>::mkobj(&x1state);
REQUIRE(x1gc.iface());
REQUIRE(x1gc.data());
REQUIRE(x1alloc.iface());
REQUIRE(x1alloc.data());
rng::Seed<rng::xoshiro256ss> seed;
std::cerr << "ratio: seed=" << seed << std::endl;
auto rng = rng::xoshiro256ss(seed);
utest::AllocUtil::random_allocs(25, true, &rng, x1alloc);
}
}
}