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1 : : // Copyright (c) 2020-2022 The Bitcoin Core developers
2 : : // Distributed under the MIT software license, see the accompanying
3 : : // file COPYING or http://www.opensource.org/licenses/mit-license.php.
4 : : //
5 : : #include <chainparams.h>
6 : : #include <consensus/validation.h>
7 : : #include <random.h>
8 : : #include <rpc/blockchain.h>
9 : : #include <sync.h>
10 : : #include <test/util/chainstate.h>
11 : : #include <test/util/coins.h>
12 : : #include <test/util/random.h>
13 : : #include <test/util/setup_common.h>
14 : : #include <uint256.h>
15 : : #include <util/check.h>
16 : : #include <validation.h>
17 : :
18 : : #include <vector>
19 : :
20 : : #include <boost/test/unit_test.hpp>
21 : :
22 : : BOOST_FIXTURE_TEST_SUITE(validation_chainstate_tests, ChainTestingSetup)
23 : :
24 : : //! Test resizing coins-related Chainstate caches during runtime.
25 : : //!
26 [ + - + - : 7 : BOOST_AUTO_TEST_CASE(validation_chainstate_resize_caches)
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27 : : {
28 : 1 : ChainstateManager& manager = *Assert(m_node.chainman);
29 : 1 : CTxMemPool& mempool = *Assert(m_node.mempool);
30 [ + - + - ]: 3 : Chainstate& c1 = WITH_LOCK(cs_main, return manager.InitializeChainstate(&mempool));
31 [ + - ]: 1 : c1.InitCoinsDB(
32 : : /*cache_size_bytes=*/1 << 23, /*in_memory=*/true, /*should_wipe=*/false);
33 [ + - ]: 3 : WITH_LOCK(::cs_main, c1.InitCoinsCache(1 << 23));
34 [ + - + - ]: 2 : BOOST_REQUIRE(c1.LoadGenesisBlock()); // Need at least one block loaded to be able to flush caches
35 : :
36 : : // Add a coin to the in-memory cache, upsize once, then downsize.
37 : 1 : {
38 : 1 : LOCK(::cs_main);
39 [ + - + - ]: 1 : const auto outpoint = AddTestCoin(c1.CoinsTip());
40 : :
41 : : // Set a meaningless bestblock value in the coinsview cache - otherwise we won't
42 : : // flush during ResizecoinsCaches() and will subsequently hit an assertion.
43 [ + - + - ]: 2 : c1.CoinsTip().SetBestBlock(InsecureRand256());
44 : :
45 [ + - + - : 2 : BOOST_CHECK(c1.CoinsTip().HaveCoinInCache(outpoint));
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- ]
46 : :
47 [ + - ]: 1 : c1.ResizeCoinsCaches(
48 : : 1 << 24, // upsizing the coinsview cache
49 : : 1 << 22 // downsizing the coinsdb cache
50 : : );
51 : :
52 : : // View should still have the coin cached, since we haven't destructed the cache on upsize.
53 [ + - + - : 2 : BOOST_CHECK(c1.CoinsTip().HaveCoinInCache(outpoint));
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- ]
54 : :
55 [ + - ]: 1 : c1.ResizeCoinsCaches(
56 : : 1 << 22, // downsizing the coinsview cache
57 : : 1 << 23 // upsizing the coinsdb cache
58 : : );
59 : :
60 : : // The view cache should be empty since we had to destruct to downsize.
61 [ + - + - : 2 : BOOST_CHECK(!c1.CoinsTip().HaveCoinInCache(outpoint));
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- ]
62 : 1 : }
63 : 1 : }
64 : :
65 : : //! Test UpdateTip behavior for both active and background chainstates.
66 : : //!
67 : : //! When run on the background chainstate, UpdateTip should do a subset
68 : : //! of what it does for the active chainstate.
69 [ + - + - : 7 : BOOST_FIXTURE_TEST_CASE(chainstate_update_tip, TestChain100Setup)
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70 : : {
71 : 1 : ChainstateManager& chainman = *Assert(m_node.chainman);
72 : 1 : uint256 curr_tip = ::g_best_block;
73 : :
74 : : // Mine 10 more blocks, putting at us height 110 where a valid assumeutxo value can
75 : : // be found.
76 : 1 : mineBlocks(10);
77 : :
78 : : // After adding some blocks to the tip, best block should have changed.
79 [ + - ]: 2 : BOOST_CHECK(::g_best_block != curr_tip);
80 : :
81 : : // Grab block 1 from disk; we'll add it to the background chain later.
82 : 1 : std::shared_ptr<CBlock> pblockone = std::make_shared<CBlock>();
83 : 1 : {
84 [ + - ]: 1 : LOCK(::cs_main);
85 [ + - + - : 2 : chainman.m_blockman.ReadBlockFromDisk(*pblockone, *chainman.ActiveChain()[1]);
+ - ]
86 : 0 : }
87 : :
88 [ + - + - : 2 : BOOST_REQUIRE(CreateAndActivateUTXOSnapshot(
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89 : : this, NoMalleation, /*reset_chainstate=*/ true));
90 : :
91 : : // Ensure our active chain is the snapshot chainstate.
92 [ + - + - : 4 : BOOST_CHECK(WITH_LOCK(::cs_main, return chainman.IsSnapshotActive()));
+ - + - ]
93 : :
94 : 1 : curr_tip = ::g_best_block;
95 : :
96 : : // Mine a new block on top of the activated snapshot chainstate.
97 [ + - ]: 1 : mineBlocks(1); // Defined in TestChain100Setup.
98 : :
99 : : // After adding some blocks to the snapshot tip, best block should have changed.
100 [ + - + - : 2 : BOOST_CHECK(::g_best_block != curr_tip);
+ - ]
101 : :
102 : 1 : curr_tip = ::g_best_block;
103 : :
104 [ + - + - : 1 : BOOST_CHECK_EQUAL(chainman.GetAll().size(), 2);
+ - ]
105 : :
106 [ + - + - : 2 : Chainstate& background_cs{*Assert([&]() -> Chainstate* {
+ - ]
107 : : for (Chainstate* cs : chainman.GetAll()) {
108 : : if (cs != &chainman.ActiveChainstate()) {
109 : : return cs;
110 : : }
111 : : }
112 : : return nullptr;
113 : 1 : }())};
114 : :
115 : : // Append the first block to the background chain.
116 [ + - ]: 1 : BlockValidationState state;
117 : 1 : CBlockIndex* pindex = nullptr;
118 [ + - ]: 1 : const CChainParams& chainparams = Params();
119 : 1 : bool newblock = false;
120 : :
121 : : // TODO: much of this is inlined from ProcessNewBlock(); just reuse PNB()
122 : : // once it is changed to support multiple chainstates.
123 : 1 : {
124 [ + - ]: 1 : LOCK(::cs_main);
125 [ + - ]: 1 : bool checked = CheckBlock(*pblockone, state, chainparams.GetConsensus());
126 [ + - + - : 2 : BOOST_CHECK(checked);
+ - ]
127 [ + - + - : 2 : bool accepted = chainman.AcceptBlock(
+ - ]
128 : : pblockone, state, &pindex, true, nullptr, &newblock, true);
129 [ + - + - : 2 : BOOST_CHECK(accepted);
+ - ]
130 : 0 : }
131 : :
132 : : // UpdateTip is called here
133 [ + - + - : 2 : bool block_added = background_cs.ActivateBestChain(state, pblockone);
+ - ]
134 : :
135 : : // Ensure tip is as expected
136 [ + - + - : 2 : BOOST_CHECK_EQUAL(background_cs.m_chain.Tip()->GetBlockHash(), pblockone->GetHash());
+ - + - ]
137 : :
138 : : // g_best_block should be unchanged after adding a block to the background
139 : : // validation chain.
140 [ + - + - : 2 : BOOST_CHECK(block_added);
+ - ]
141 [ + - + - ]: 1 : BOOST_CHECK_EQUAL(curr_tip, ::g_best_block);
142 [ + - ]: 2 : }
143 : :
144 : : BOOST_AUTO_TEST_SUITE_END()
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