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Differential D3436

Fix concurrency-related bugs in ActivateBestChain
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Authored by deadalnix on Jun 27 2019, 16:42.

Details

Reviewers
jasonbcox
Group Reviewers
Restricted Project
Commits
rSTAGING188c6ab4b8e5: Fix concurrency-related bugs in ActivateBestChain
rABC188c6ab4b8e5: Fix concurrency-related bugs in ActivateBestChain
Summary

If multiple threads are invoking ActivateBestChain, it was possible to have
them working towards different tips, and we could arrive at a less work tip
than we should. Fix this by introducing a ChainState lock which must
be held for the entire duration of ActivateBestChain to enforce
exclusion in ABC.

This is a partial backport of Core PR13023 : https://github.com/bitcoin/bitcoin/pull/13023/commits/a3ae8e68739023e5dba9e5cb190e707ed4603316

Depends on D3435

Test Plan
make check

Diff Detail

Repository
rABC Bitcoin ABC
Branch
concurencybug
Lint
Lint Passed
Unit
No Test Coverage
Build Status
Buildable 6508
Build 11063: Bitcoin ABC Buildbot (legacy)
Build 11062: arc lint + arc unit

Event Timeline

deadalnix created this revision.Jun 27 2019, 16:42
Herald added a reviewer: Restricted Project. · View Herald TranscriptJun 27 2019, 16:42
teamcity added a comment.Jun 27 2019, 16:43

Build Bitcoin-ABC / Diffs / Bitcoin-ABC Diff Testing started.

deadalnix added a child revision: D3437: Add unit tests for signals generated by ProcessNewBlock().Jun 27 2019, 16:48
teamcity added a comment.Jun 27 2019, 16:53

Build Bitcoin-ABC / Diffs / Bitcoin-ABC Diff Testing passed.

Harbormaster completed remote builds in B6508: Diff 9718.Jun 27 2019, 16:53
deadalnix updated this revision to Diff 9763.Jun 28 2019, 14:09

Rebase

teamcity added a comment.Jun 28 2019, 14:09

Build Bitcoin-ABC / Diffs / Bitcoin-ABC Diff Testing started.

teamcity added a comment.Jun 28 2019, 14:20

Build Bitcoin-ABC / Diffs / Bitcoin-ABC Diff Testing passed.

Harbormaster completed remote builds in B6534: Diff 9763.Jun 28 2019, 14:20
jasonbcox accepted this revision.Jun 28 2019, 16:39
This revision is now accepted and ready to land.Jun 28 2019, 16:39
Closed by commit rABC188c6ab4b8e5: Fix concurrency-related bugs in ActivateBestChain (authored by Jesse Cohen <jc@jc.lol>, committed by deadalnix). · Explain WhyJun 29 2019, 21:16
This revision was automatically updated to reflect the committed changes.
deadalnix added a commit: rABC188c6ab4b8e5: Fix concurrency-related bugs in ActivateBestChain.
deadalnix added a commit: rSTAGING188c6ab4b8e5: Fix concurrency-related bugs in ActivateBestChain.Sep 19 2019, 00:44
jasonbcox mentioned this in T623: Backport Core PR 13023.Oct 3 2019, 21:59

Revision Contents
Changeset List

PathSize
src/
16 lines

Diff 9718

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src/validation.cpp

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