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Merge bitcoin/bitcoin#31238: fuzz: Limit wallet_notifications iterations 
fa461d7a43 fuzz: Limit wallet_notifications iterations (MarcoFalke)

Pull request description:

  I don't think the fuzz target has ever found a real issue. The closest being https://github.com/bitcoin/bitcoin/pull/25869

  It is also, by far, the slowest fuzz target. For example, looking at https://cirrus-ci.com/task/5533338067271680?logs=ci#L3974, it takes more than one hour:

  ```
  Run wallet_notifications with args ['/ci_container_base/ci/scratch/build-x86_64-pc-linux-gnu/src/test/fuzz/fuzz', '-runs=1', PosixPath('/ci_container_base/ci/scratch/qa-assets/fuzz_corpora/wallet_notifications')]INFO: Running with entropic power schedule (0xFF, 100).
  INFO: Seed: 1096115652
  INFO: Loaded 1 modules   (625824 inline 8-bit counters): 625824 [0x5628396d9138, 0x562839771dd8),
  INFO: Loaded 1 PC tables (625824 PCs): 625824 [0x562839771dd8,0x56283a0fe7d8),
  INFO:     1287 files found in /ci_container_base/ci/scratch/qa-assets/fuzz_corpora/wallet_notifications
  INFO: -max_len is not provided; libFuzzer will not generate inputs larger than 1047827 bytes
  INFO: seed corpus: files: 1287 min: 1b max: 1047827b total: 11616898b rss: 172Mb
  #16pulse  cov: 14328 ft: 25341 corp: 14/239b exec/s: 5 rss: 204Mb
  #64pulse  cov: 19179 ft: 58412 corp: 61/3587b exec/s: 5 rss: 320Mb
  #128pulse  cov: 19692 ft: 85738 corp: 125/16Kb exec/s: 3 rss: 544Mb
  #256pulse  cov: 19923 ft: 107490 corp: 253/72Kb exec/s: 2 rss: 556Mb
  #512pulse  cov: 20107 ft: 124704 corp: 509/330Kb exec/s: 2 rss: 590Mb
  Slowest unit: 10 s:
  artifact_prefix='./'; Test unit written to ./slow-unit-9fa5f7d7e4afa1626622ef1b3c70a7563eecf11d
  #1024pulse  cov: 20360 ft: 136324 corp: 1009/2488Kb exec/s: 0 rss: 726Mb
  Slowest unit: 23 s:
  artifact_prefix='./'; Test unit written to ./slow-unit-5d99a20de2c2b6bedb0cbaf0ba3743ae3ba13c7c
  Slowest unit: 26 s:
  artifact_prefix='./'; Test unit written to ./slow-unit-8889ecb61bdc0650355e0d0d27c012f3239d07a4
  Slowest unit: 42 s:
  artifact_prefix='./'; Test unit written to ./slow-unit-d16c084282ac1a85fcdc43c48e49836b08446686
  #1289INITED cov: 20409 ft: 138281 corp: 1245/10323Kb exec/s: 0 rss: 880Mb
  #1289DONE   cov: 20409 ft: 138281 corp: 1245/10323Kb lim: 1047827 exec/s: 0 rss: 880Mb
  Done 1289 runs in 3813 second(s)
  ```

  Looking at the flame graphs, it looks like the slow runs spend most of their time in the Knapsack solver. This seems reasonable, because it may run 1000 inner Knapsack iterations 200 times. So reduce the fuzz iterations from 200 to 20 to avoid fuzz timeouts and wasted resources.

ACKs for top commit:
  brunoerg:
    code review ACK fa461d7a43
  dergoegge:
    lgtm ACK fa461d7a43

Tree-SHA512: bee707a3398ab0c729f335f00d8cad63135939831454dd863830fc957b4b51b27064224be0ed15eb76cfcc39de972e4e79b0802940934fbac516840ddc475ab9
2024-11-07 10:27:38 +00:00
.github Merge bitcoin/bitcoin#31191: build: Make G_FUZZING constexpr, require -DBUILD_FOR_FUZZING=ON to fuzz 2024-11-05 06:05:27 -05:00
.tx qt: Bump Transifex slug for 28.x 2024-07-30 16:14:19 +01:00
ci ci: add second_deadlock_stack=1 to TSAN options 2024-11-06 11:03:41 +00:00
cmake Merge bitcoin/bitcoin#31173: cmake: Add FindQRencode module and enable libqrencode package for MSVC 2024-11-06 12:11:39 +00:00
contrib build: Unify -logsourcelocations format 2024-11-04 11:30:43 +00:00
depends depends, doc: List packages required to build qt package separately 2024-11-04 11:22:33 +00:00
doc build, msvc: Enable libqrencode vcpkg package 2024-11-05 16:38:56 +00:00
share build: Rename PACKAGE_* variables to CLIENT_* 2024-10-28 12:35:55 +00:00
src Merge bitcoin/bitcoin#31238: fuzz: Limit wallet_notifications iterations 2024-11-07 10:27:38 +00:00
test Merge bitcoin/bitcoin#31139: test: added test to assert TX decode rpc error on submitpackage rpc 2024-11-01 17:21:04 -04:00
.cirrus.yml Squashed 'src/secp256k1/' changes from 2f2ccc46954..0cdc758a563 2024-11-04 14:59:46 -05:00
.editorconfig code style: update .editorconfig file 2024-09-13 17:55:10 +02:00
.gitattributes
.gitignore Squashed 'src/secp256k1/' changes from 2f2ccc46954..0cdc758a563 2024-11-04 14:59:46 -05:00
.python-version Bump python minimum supported version to 3.10 2024-08-28 15:53:07 +02:00
.style.yapf Update .style.yapf 2023-06-01 23:35:10 +05:30
CMakeLists.txt Merge bitcoin/bitcoin#31173: cmake: Add FindQRencode module and enable libqrencode package for MSVC 2024-11-06 12:11:39 +00:00
CMakePresets.json build, msvc: Enable libqrencode vcpkg package 2024-11-05 16:38:56 +00:00
CONTRIBUTING.md doc: replace Autotools with CMake 2024-08-29 16:06:29 +01:00
COPYING doc: upgrade Bitcoin Core license to 2024 2024-01-10 16:29:01 -06:00
INSTALL.md doc: Added hyperlink for doc/build 2021-09-09 19:53:12 +05:30
libbitcoinkernel.pc.in build: Rename PACKAGE_* variables to CLIENT_* 2024-10-28 12:35:55 +00:00
README.md Squashed 'src/secp256k1/' changes from 2f2ccc46954..0cdc758a563 2024-11-04 14:59:46 -05:00
SECURITY.md Update security.md contact for achow101 2023-12-14 18:14:54 -05:00
vcpkg.json build, msvc: Enable libqrencode vcpkg package 2024-11-05 16:38:56 +00:00

README.md

Bitcoin Core integration/staging tree

https://bitcoincore.org

For an immediately usable, binary version of the Bitcoin Core software, see https://bitcoincore.org/en/download/.

What is Bitcoin Core?

Bitcoin Core connects to the Bitcoin peer-to-peer network to download and fully validate blocks and transactions. It also includes a wallet and graphical user interface, which can be optionally built.

Further information about Bitcoin Core is available in the doc folder.

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 it is not guaranteed to be completely stable. Tags are created regularly from release branches to indicate new official, stable release versions of Bitcoin Core.

The https://github.com/bitcoin-core/gui repository is used exclusively for the development of the GUI. Its master branch is identical in all monotree repositories. Release branches and tags do not exist, so please do not fork that repository unless it is for development reasons.

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 during the generation of the build system) with: ctest. 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. These tests can be run (if the test dependencies are installed) with: build/test/functional/test_runner.py (assuming build is your build directory).

The CI (Continuous Integration) systems make 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.