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xo-gc: + arena for object roots

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This commit is contained in:
Roland Conybeare 2026-01-03 13:53:21 -05:00
commit 2e7f574655
3 changed files with 35 additions and 5 deletions
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23
src/gc/DX1Collector.cpp
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@ -77,6 +77,13 @@ namespace xo {
.hugepage_z_ = page_z,
.store_header_flag_ = false});
roots_ = DArena::map(
ArenaConfig{
.name_ = "x1-object-roots",
.size_ = cfg.object_roots_z_,
.hugepage_z_ = page_z,
.store_header_flag_ = false});
for (uint32_t igen = 0, ngen = cfg.n_generation_; igen < ngen; ++igen) {
space_storage_[0][igen] = DArena::map(cfg.arena_config_);
space_storage_[1][igen] = DArena::map(cfg.arena_config_);
@ -119,7 +126,10 @@ namespace xo {
accumulate_total_aux(const DX1Collector & d,
size_t (DArena::* get_stat_fn)() const) noexcept
{
size_t z = (d.object_types_.*get_stat_fn)();
size_t z1 = (d.object_types_.*get_stat_fn)();
size_t z2 = (d.roots_.*get_stat_fn)();
size_t z3 = 0;
for (role ri : role::all()) {
for (generation gj{0}; gj < d.config_.n_generation_; ++gj) {
@ -127,11 +137,11 @@ namespace xo {
assert(arena);
z += (arena->*get_stat_fn)();
z3 += (arena->*get_stat_fn)();
}
}
return z;
return z1 + z2 + z3;
}
}
@ -231,7 +241,12 @@ namespace xo {
void
DX1Collector::add_gc_root_poly(obj<AGCObject> * p_root) noexcept
{
(void)p_root;
std::byte * mem
= roots_.alloc(typeseq::anon(),
sizeof(obj<AGCObject>*));
assert(mem);
*(obj<AGCObject> **)mem = p_root;
}
void