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xo-gc: utest: support assign_root

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This is so we can generate garbage
This commit is contained in:
Roland Conybeare 2026-04-25 20:06:15 -04:00
commit e6540bd5fe
3 changed files with 46 additions and 8 deletions
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19
utest/MutationLogStore.test.cpp
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@ -265,22 +265,31 @@ namespace ut {
{Cmd::make_nil, 0, 0}, // [1]: #nil
{Cmd::make_cons, 0, 1}, // [2]: cons([0],[1]) -> cons(99,#nil)
// 1st gc
// phase 0 gc (1st gc)
// ----- phase 1 -----
{Cmd::make_int, 15, 0}, // [3]: 15
{Cmd::assign_head, 2, 3}, // set-car([2],[3]) -> set-car([2],15)
// 2nd gc. [1]..[2] promote to g1
// phase 1 gc (2nd gc)
// [1]..[2] promote to g1
// [3] in g0 so [2]->[3] requires mlog entry
// ----- phase 2 -----
{Cmd::make_int, 24, 0}, // [4]: 33
{Cmd::assign_head, 2, 4}, // set-car([2],[4]) -> set-car([2],33)
// phase 2 gc (3rd gc)
// ----- phase 3 -----
{Cmd::assign_root, 2, 0}, // [2] = [0] = 99
// o.g. [2] now garbage
// ----- phase 4 -----
// ----- end -----
{Cmd::sentinel, 0, 0},
};
@ -292,8 +301,8 @@ namespace ut {
{ 0, 3, {0} }, // phase 0 gc
{ 3, 5, {1} }, // phase 1 gc. set-car makes 1x xage ptr
{ 5, 7, {2} }, // phase 2 gc. now src in g1, dest [3] in g0
{ 7, 7, {1} }, // phase 3 gc. new dest [4] in g0
{ 7, 7, {0} }, // phase 4 gc. now dest in g1
{ 7, 8, {1} }, // phase 3 gc. new dest [4] in g0
{ 8, 8, {0} }, // phase 4 gc. now dest [4] in g1
{ -1, -1, {0} },
};
@ -331,7 +340,7 @@ namespace ut {
Testcase(2, 1, 16 * 1024, 8 * 128, T, seq_2, 128, T, c_fixed, 3, 0, 0, 0, 0, F),
Testcase(2, 2, 16 * 1024, 8 * 128, T, seq_3, 128, T, c_fixed, 4, 0, 0, 0, 0, F),
Testcase(2, 2, 16 * 1024, 8 * 128, T, seq_4, 128, T, c_fixed, 4, 0, 0, 0, 0, F),
Testcase(2, 2, 16 * 1024, 8 * 128, T, seq_5, 128, T, c_fixed, 4, 0, 0, 0, 0, F),
Testcase(2, 2, 16 * 1024, 8 * 128, T, seq_5, 128, T, c_fixed, 4, 0, 0, 0, 0, T),
};
# undef T