eb9a1fe037
fa09871320refactor: Avoid sign-compare compiler warning in util/asmap (MarcoFalke) Pull request description: Can be reproduced on current master with `D_GLIBCXX_DEBUG`: ``` /usr/bin/../lib/gcc/x86_64-linux-gnu/9/../../../../include/c++/9/debug/safe_iterator.h:883: In function: __gnu_debug::_Safe_iterator<type-parameter-0-0, type-parameter-0-1, std::random_access_iterator_tag>::_Self __gnu_debug::operator+(const __gnu_debug::_Safe_iterator<type-parameter-0-0, type-parameter-0-1, std::random_access_iterator_tag>::_Self &, __gnu_debug::_Safe_iterator<type-parameter-0-0, type-parameter-0-1, std::random_access_iterator_tag>::difference_type) Error: attempt to advance a dereferenceable iterator 369 steps, which falls outside its valid range. Objects involved in the operation: iterator @ 0x0x7ffd3d613138 { type = std::__cxx1998::_Bit_const_iterator (constant iterator); state = dereferenceable; references sequence with type 'std::__debug::vector<bool, std::allocator<bool> >' @ 0x0x7ffd3d663590 } ==65050== ERROR: libFuzzer: deadly signal #0 0x559ab9787690 in __sanitizer_print_stack_trace (/bitcoin/src/test/fuzz/fuzz+0x5a1690) #1 0x559ab9733998 in fuzzer::PrintStackTrace() (/bitcoin/src/test/fuzz/fuzz+0x54d998) #2 0x559ab9718ae3 in fuzzer::Fuzzer::CrashCallback() (/bitcoin/src/test/fuzz/fuzz+0x532ae3) #3 0x7f70a0e723bf (/lib/x86_64-linux-gnu/libpthread.so.0+0x153bf) #4 0x7f70a0b3418a in raise (/lib/x86_64-linux-gnu/libc.so.6+0x4618a) #5 0x7f70a0b13858 in abort (/lib/x86_64-linux-gnu/libc.so.6+0x25858) #6 0x7f70a0f21148 (/lib/x86_64-linux-gnu/libstdc++.so.6+0xa1148) #7 0x559ab9f60a96 in __gnu_debug::operator+(__gnu_debug::_Safe_iterator<std::__cxx1998::_Bit_const_iterator, std::__debug::vector<bool, std::allocator<bool> >, std::random_access_iterator_tag> const&, long) /usr/bin/../lib/gcc/x86_64-linux-gnu/9/../../../../include/c++/9/debug/safe_iterator.h:881:2 #8 0x559ab9f61062 in SanityCheckASMap(std::__debug::vector<bool, std::allocator<bool> > const&, int) util/asmap.cpp:159:21 #9 0x559ab9e4fdfa in SanityCheckASMap(std::__debug::vector<bool, std::allocator<bool> > const&) netaddress.cpp:1242:12 #10 0x559ab9793fcb in addrman_fuzz_target(Span<unsigned char const>) test/fuzz/addrman.cpp:43:14 #11 0x559ab978a03c in std::_Function_handler<void (Span<unsigned char const>), void (*)(Span<unsigned char const>)>::_M_invoke(std::_Any_data const&, Span<unsigned char const>&&) /usr/bin/../lib/gcc/x86_64-linux-gnu/9/../../../../include/c++/9/bits/std_function.h:300:2 #12 0x559aba2692c7 in std::function<void (Span<unsigned char const>)>::operator()(Span<unsigned char const>) const /usr/bin/../lib/gcc/x86_64-linux-gnu/9/../../../../include/c++/9/bits/std_function.h:688:14 #13 0x559aba269132 in LLVMFuzzerTestOneInput test/fuzz/fuzz.cpp:63:5 #14 0x559ab971a1a1 in fuzzer::Fuzzer::ExecuteCallback(unsigned char const*, unsigned long) (/bitcoin/src/test/fuzz/fuzz+0x5341a1) #15 0x559ab97198e5 in fuzzer::Fuzzer::RunOne(unsigned char const*, unsigned long, bool, fuzzer::InputInfo*, bool*) (/bitcoin/src/test/fuzz/fuzz+0x5338e5) #16 0x559ab971bb87 in fuzzer::Fuzzer::MutateAndTestOne() (/bitcoin/src/test/fuzz/fuzz+0x535b87) #17 0x559ab971c885 in fuzzer::Fuzzer::Loop(std::__Fuzzer::vector<fuzzer::SizedFile, fuzzer::fuzzer_allocator<fuzzer::SizedFile> >&) (/bitcoin/src/test/fuzz/fuzz+0x536885) #18 0x559ab970b23e in fuzzer::FuzzerDriver(int*, char***, int (*)(unsigned char const*, unsigned long)) (/bitcoin/src/test/fuzz/fuzz+0x52523e) #19 0x559ab9734082 in main (/bitcoin/src/test/fuzz/fuzz+0x54e082) #20 0x7f70a0b150b2 in __libc_start_main (/lib/x86_64-linux-gnu/libc.so.6+0x270b2) #21 0x559ab96dffdd in _start (/bitcoin/src/test/fuzz/fuzz+0x4f9fdd) ACKs for top commit: sipa: utACKfa09871320vasild: ACKfa09871320Tree-SHA512: 802fda33bda40fe2521f1e3be075ceddc5fd9ba185bd494286e50019931dfd688da7a6513601138b1dc7bb8e80ae47c8572902406eb59f68990619ddb2656748
Bitcoin Core integration/staging tree
For an immediately usable, binary version of the Bitcoin Core software, see https://bitcoincore.org/en/download/.
Further information about Bitcoin Core is available in the doc folder.
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 read the original Bitcoin 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 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 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.
These tests can be run (if the test dependencies are installed) with: test/functional/test_runner.py
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.