This imitates the use of the getblockfrompeer rpc.
Note that currently pruning is limited to blocks in the active chain.
Co-authored-by: Martin Zumsande <mzumsande@gmail.com>
CConnman::Stop() resets semOutbound, yet m_reconnections is not
cleared in Stop. Each ReconnectionInfo contains a grant member
that points to the memory that semOutbound pointed to and ~CConnman
will attempt to access the grant field (memory that was already
freed) when destroying m_reconnections. Fix this by calling
m_reconnections.clear() in CConnman::Stop() and add appropriate
annotations.
Previously in debug builds, this would cause an Assume crash if
FillBlock had been called previously. This could happen when multiple
blocktxn messages were received.
Co-Authored-By: Greg Sanders <gsanders87@gmail.com>
Change time_window from 20s to 1h so Reset is not accidentally called
if the test takes a while.
Change num_lines from 1024 to 10 since LogRateLimiter is parameterized
and does not require logging 1MiB of data.
Co-Authored-By: stickies-v <stickies-v@protonmail.com>
In LogPrintStr_:
- remove an unnecessary BCLog since we are in the BCLog namespace.
- remove an unnecessary \n when rate limiting is triggered since
FormatLogStrInPlace will add it.
- move the ratelimit bool into an else if block.
- prefix all log lines with [*] when suppressions exist. Previously this
was only done if should_ratelimit was true.
In Reset:
- remove an unnecessary \n since FormatLogStrInPlace will add it.
- Change Level::Info to Level::Warning.
To mitigate disk-filling attacks caused by unsafe usages of LogPrintf and
friends, we rate-limit them by passing a should_ratelimit bool that
eventually makes its way to LogPrintStr which may call
LogRateLimiter::Consume. The rate limiting is accomplished by
adding a LogRateLimiter member to BCLog::Logger which tracks source
code locations for the given logging window.
Every hour, a source location can log up to 1MiB of data. Source
locations that exceed the limit will have their logs suppressed for the
rest of the window determined by m_limiter.
This change affects the public LogPrintLevel function if called with
a level >= BCLog::Level::Info.
The UpdateTipLog function has been changed to use the private LogPrintLevel_
macro with should_ratelimit set to false. This allows UpdateTipLog to log
during IBD without hitting the rate limit.
Note that on restart, a source location that was rate limited before the
restart will be able to log until it hits the rate limit again.
Co-Authored-By: Niklas Gogge <n.goeggi@gmail.com>
Co-Authored-By: stickies-v <stickies-v@protonmail.com>
The std::source_location conveniently stores the file name, line number,
and function name of a source code location. We switch to using it instead
of the __func__ identifier and the __FILE__ and __LINE__ macros.
BufferedLog is changed to have a std::source_location member, replacing the
source_file, source_line, and logging_function members. As a result,
MemUsage no longer explicitly counts source_file or logging_function as the
std::source_location memory usage is included in the MallocUsage call.
This also changes the behavior of -logsourcelocations as std::source_location
includes the entire function signature. Because of this, the functional test
feature_config_args.py must be changed to no longer include the function
signature as the function signature can differ across platforms.
Co-Authored-By: Niklas Gogge <n.goeggi@gmail.com>
Co-Authored-By: stickies-v <stickies-v@protonmail.com>
LogRateLimiter will be used to keep track of source locations and our
current time-based logging window. It contains an unordered_map and a
m_suppressions_active bool to track source locations. The map is keyed
by std::source_location, so a custom Hash function (SourceLocationHasher)
and custom KeyEqual function (SourceLocationEqual) is provided.
SourceLocationHasher uses CSipHasher(0,0) under the hood to get a
uniform distribution.
A public Reset method is provided so that a scheduler (e.g. the
"b-scheduler" thread) can periodically reset LogRateLimiter's state when
the time window has elapsed.
The LogRateLimiter::Consume method checks if we have enough available
bytes in our rate limiting budget to log an additional string. It
returns a Status enum that denotes the rate limiting status and can
be used by the caller to emit a warning, skip logging, etc.
The Status enum has three states:
- UNSUPPRESSED (logging was successful)
- NEWLY_SUPPRESSED (logging was succcesful, next log will be suppressed)
- STILL_SUPPRESSED (logging was unsuccessful)
LogLimitStats counts the available bytes left for logging per source
location for the current logging window. It does not track actual source
locations; it is used as a value in m_source_locations.
Also exposes a SuppressionsActive() method so the logger can use
that in a later commit to prefix [*] to logs whenenever suppressions
are active.
Co-Authored-By: Niklas Gogge <n.goeggi@gmail.com>
Co-Authored-By: stickies-v <stickies-v@protonmail.com>
We mark ~DebugLogHelper as noexcept(false) to be able to catch the
exception it throws. This lets us use it in test in combination with
BOOST_CHECK_THROW and BOOST_CHECK_NO_THROW to check that certain log
messages are (not) logged.
Co-Authored-By: Niklas Gogge <n.goeggi@gmail.com>
This commit ignores the qa-assets/ folder in case a user is running
the cov_fuzz target without DIR_FUZZ_SEED_CORPUS set. In this case,
the qa-assets folder is assumed to live in the bitcoin directory and
should be ignored by git.
This commit allows the user to specify the location of the
fuzz_seed_corpus directory on their machine when running the cov_fuzz
target. If DIR_FUZZ_SEED_CORPUS is specified, then this will be used.
Otherwise, qa-assets/fuzz_seed_corpus is assumed to be in the bitcoin
directory.
With this commit, the files in /usr/local/ will not be included in
`make cov` or `make cov_fuzz` coverage reports. This behavior could
be observed when generating the reports on macOS with brew-installed
clang.
With this commit, make clean now removes coverage files from the
fuzzing directory. Without this, subsequent fuzzing runs would have
garbled coverage signals for files in the fuzz directory as
they were never deleted with make clean.
This commit includes a short comment in doc/fuzzing.md that gives
guidance on compiling Bitcoin Core with AFL instrumentation using
afl-gcc and afl-g++.
