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Bitcoin Core mirror and no, I don't give a fuck about Monero.
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MarcoFalke fe1357a03a
Merge #18881: Prevent UB in DeleteLock() function 
90eb027204 doc: Add and fix comments about never destroyed objects (Hennadii Stepanov)
26c093a995 Replace thread_local g_lockstack with a mutex-protected map (Hennadii Stepanov)
58e6881bc5 refactor: Refactor duplicated code into LockHeld() (Hennadii Stepanov)
f511f61dda refactor: Add LockPair type alias (Hennadii Stepanov)
8d8921abd3 refactor: Add LockStackItem type alias (Hennadii Stepanov)
458992b06d Prevent UB in DeleteLock() function (Hennadii Stepanov)

Pull request description:

  Tracking our instrumented mutexes (`Mutex` and `RecursiveMutex` types) requires that all involved objects should not be destroyed until after their last use. On master (ec79b5f86b) we have two problems related to the object destroying order:
  - the function-local `static` `lockdata` object that is destroyed at [program exit](https://en.cppreference.com/w/cpp/utility/program/exit)
  - the `thread_local` `g_lockstack` that is destroyed at [thread exit](https://en.cppreference.com/w/cpp/language/destructor)

  Both cases could cause UB at program exit in so far as mutexes are used in other static object destructors.

  Fix #18824

ACKs for top commit:
  MarcoFalke:
    re-ACK 90eb027204, only change is new doc commit 👠
  ryanofsky:
    Code review ACK 90eb027204 because all the changes look correct and safe. But I don't know the purpose of commit  26c093a995 "Replace thread_local g_lockstack with a mutex-protected map (5/6)." It seems like it could have a bad impact on debug performance, and the commit message and PR description don't give a reason for the change.

Tree-SHA512: 99f29157fd1278994e3f6eebccedfd9dae540450f5f8b980518345a89d56b635f943a85b20864cef087027fd0fcdb4880b659ef59bfe5626d110452ae22031c6
2020-05-26 08:14:57 -04:00
.github Remove GitHub Actions CI workflow. 2020-01-30 18:45:28 +00:00
.tx tx: Bump transifex slug to 020x 2020-03-16 10:52:55 +01:00
build-aux/m4 Update ax_cxx_compile_stdcxx.m4 2020-04-11 02:15:20 -07:00
build_msvc build: remove fdelt_chk backwards compatibility code 2020-05-07 15:44:56 +08:00
ci test: Replace TEST_PREVIOUS_RELEASES env var with test_framework option 2020-05-21 07:47:46 -04:00
contrib Merge #18958: guix: Make V=1 more powerful for debugging 2020-05-21 15:09:48 +08:00
depends gui: update Qt base translations for macOS release 2020-05-23 18:22:29 +08:00
doc doc: Drop protobuf stuff 2020-05-23 10:14:18 +03:00
share Merge #18616: refactor: Cleanup clientversion.cpp 2020-05-13 20:14:51 +02:00
src Merge #18881: Prevent UB in DeleteLock() function 2020-05-26 08:14:57 -04:00
test Merge #19010: net processing: Add support for getcfheaders 2020-05-26 07:27:00 -04:00
.appveyor.yml Merge #18640: appveyor: Remove clcache 2020-04-15 16:19:52 -04:00
.cirrus.yml Remove unused ci configs that have been moved elsewhere 2020-05-10 07:51:31 -04:00
.fuzzbuzz.yml ci: Add fuzzbuzz integration 2020-04-14 16:38:26 +00:00
.gitattributes Separate protocol versioning from clientversion 2014-10-29 00:24:40 -04:00
.gitignore build: multiprocess autotools changes 2020-05-12 09:47:06 -04:00
.python-version .python-version: Specify full version 3.5.6 2019-03-02 12:06:26 -05:00
.style.yapf test: .style.yapf: Set column_limit=160 2019-03-04 18:28:13 -05:00
.travis.yml Merge #18677: Multiprocess build support 2020-05-21 15:34:25 +08:00
autogen.sh scripted-diff: Bump copyright of files changed in 2019 2019-12-30 10:42:20 +13:00
configure.ac Merge #18677: Multiprocess build support 2020-05-21 15:34:25 +08:00
CONTRIBUTING.md Merge #18283: doc: Explain rebase policy in CONTRIBUTING.md 2020-03-11 16:01:25 +01:00
COPYING doc: Update license year range to 2020 2019-12-26 23:11:21 +01:00
INSTALL.md Update INSTALL landing redirection notice for build instructions. 2016-10-06 12:27:23 +13:00
libbitcoinconsensus.pc.in build: remove libcrypto as internal dependency in libbitcoinconsensus.pc 2019-11-19 15:03:44 +01:00
Makefile.am gui: update Qt base translations for macOS release 2020-05-23 18:22:29 +08:00
README.md Adding build instructions to Bitcoin Core, fixes #18658 2020-04-16 21:01:00 -07:00
SECURITY.md doc: Remove explicit mention of version from SECURITY.md 2019-06-14 06:39:17 -04:00

README.md

Bitcoin Core integration/staging tree

https://bitcoincore.org

What is Bitcoin?

Bitcoin is an experimental digital currency that enables instant payments to anyone, anywhere in the world. Bitcoin uses peer-to-peer technology to operate with no central authority: managing transactions and issuing money are carried out collectively by the network. Bitcoin Core is the name of open source software which enables the use of this currency.

For more information, as well as an immediately usable, binary version of the Bitcoin Core software, see https://bitcoincore.org/en/download/, or read the original whitepaper.

License

Bitcoin Core is released under the terms of the MIT license. See COPYING for more information or see https://opensource.org/licenses/MIT.

Development Process

The master branch is regularly built (see doc/build-*.md for instructions) and tested, but is not guaranteed to be completely stable. Tags are created regularly to indicate new official, stable release versions of Bitcoin Core.

The contribution workflow is described in CONTRIBUTING.md and useful hints for developers can be found in doc/developer-notes.md.

Testing

Testing and code review is the bottleneck for development; we get more pull requests than we can review and test on short notice. Please be patient and help out by testing other people's pull requests, and remember this is a security-critical project where any mistake might cost people lots of money.

Automated Testing

Developers are strongly encouraged to write unit tests for new code, and to submit new unit tests for old code. Unit tests can be compiled and run (assuming they weren't disabled in configure) with: make check. Further details on running and extending unit tests can be found in /src/test/README.md.

There are also regression and integration tests, written in Python, that are run automatically on the build server. These tests can be run (if the test dependencies are installed) with: test/functional/test_runner.py

The Travis CI system makes sure that every pull request is built for Windows, Linux, and macOS, and that unit/sanity tests are run automatically.

Manual Quality Assurance (QA) Testing

Changes should be tested by somebody other than the developer who wrote the code. This is especially important for large or high-risk changes. It is useful to add a test plan to the pull request description if testing the changes is not straightforward.

Translations

Changes to translations as well as new translations can be submitted to Bitcoin Core's Transifex page.

Translations are periodically pulled from Transifex and merged into the git repository. See the translation process for details on how this works.

Important: We do not accept translation changes as GitHub pull requests because the next pull from Transifex would automatically overwrite them again.

Translators should also subscribe to the mailing list.