772996ac8b
fa513101212327f45965092652f6497aa28362ec contrib: Warn about using libFuzzer for coverage check (MarcoFalke) fa17cdb191de71cdb4151408450aa9b3eaea6cb8 test: Avoid script check worker threads while fuzzing (MarcoFalke) fa900bb2dce8ef3ee11d5980f008995d66877155 contrib: Only print fuzz output on failure (MarcoFalke) fa82fe2c7364226a758c4a59e1a4a62e3ac4846b contrib: Use -Xdemangler=llvm-cxxfilt in deterministic-*-coverage (MarcoFalke) fa7e93113052d09cc5ce4332d1c15904341bd132 contrib: Add optional parallelism to deterministic-fuzz-coverage (MarcoFalke) Pull request description: This should make the `partially_downloaded_block` fuzz target even more deterministic. Follow-up to https://github.com/bitcoin/bitcoin/pull/31841. Tracking issue: https://github.com/bitcoin/bitcoin/issues/29018. This bundles several changes: * First, speed up the `deterministic-fuzz-coverage` helper by introducing parallelism. * Then, a fix to remove spawned test threads or spawn them deterministically. (While testing this, high parallelism and thread contention may be needed) ### Testing It can be tested via (setting 32 parallel threads): ``` cargo run --manifest-path ./contrib/devtools/deterministic-fuzz-coverage/Cargo.toml -- $PWD/bld-cmake/ $PWD/../b-c-qa-assets/fuzz_corpora/ partially_downloaded_block 32 ``` Locally, on a failure, the output would look like: ```diff .... - 150| 0| m_worker_threads.emplace_back([this, n]() { - 151| 0| util::ThreadRename(strprintf("scriptch.%i", n)); + 150| 1| m_worker_threads.emplace_back([this, n]() { + 151| 1| util::ThreadRename(strprintf("scriptch.%i", n)); ... ``` This excerpt likely indicates that the script threads were started after the fuzz init function returned. Similarly, for the scheduler thread, it would look like: ```diff ... 227| 0| m_node.scheduler = std::make_unique<CScheduler>(); - 228| 1| m_node.scheduler->m_service_thread = std::thread(util::TraceThread, "scheduler", [&] { m_node.scheduler->serviceQueue(); }); + 228| 0| m_node.scheduler->m_service_thread = std::thread(util::TraceThread, "scheduler", [&] { m_node.scheduler->serviceQueue(); }); 229| 0| m_node.validation_signals = ... ``` ACKs for top commit: Prabhat1308: re-ACK [`fa51310`](fa51310121) hodlinator: re-ACK fa513101212327f45965092652f6497aa28362ec janb84: Re-ACK [fa51310](fa51310121) Tree-SHA512: 1a935eb19da98c7c3810b8bcc5287e5649ffb55bf50ab78c414a424fef8e703839291bb24040a552c49274a4a0292910a00359bdff72fa29a4f53ad36d7a8720
Repository Tools
Developer tools
Specific tools for developers working on this repository.
Additional tools, including the github-merge.py script, are available in the maintainer-tools repository.
Verify-Commits
Tool to verify that every merge commit was signed by a developer using the github-merge.py script.
Linearize
Construct a linear, no-fork, best version of the blockchain.
Qos
A Linux bash script that will set up traffic control (tc) to limit the outgoing bandwidth for connections to the Bitcoin network. This means one can have an always-on bitcoind instance running, and another local bitcoind/bitcoin-qt instance which connects to this node and receives blocks from it.
Seeds
Utility to generate the pnSeed[] array that is compiled into the client.
Build Tools and Keys
Packaging
The Debian subfolder contains the copyright file.
All other packaging related files can be found in the bitcoin-core/packaging repository.
MacDeploy
Scripts and notes for Mac builds.
Test and Verify Tools
TestGen
Utilities to generate test vectors for the data-driven Bitcoin tests.
Verify-Binaries
This script attempts to download and verify the signature file SHA256SUMS.asc from bitcoin.org.
Command Line Tools
Completions
Shell completions for bash and fish.
UTXO Set Tools
UTXO-to-SQLite
This script converts a compact-serialized UTXO set (as generated by Bitcoin Core with dumptxoutset)
to a SQLite3 database. For more details like e.g. the created table name and schema, refer to the
module docstring on top of the script, which is also contained in the command's --help output.