Tobias Frost created LOGCXX-431:
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Summary: When log4cxx creates a thread, it doesn't block signals
it's not using, leading to unreliable signal delivery for the calling process.
Key: LOGCXX-431
URL: https://issues.apache.org/jira/browse/LOGCXX-431
Project: Log4cxx
Issue Type: Bug
Affects Versions: 0.10.0
Environment: Debian
Reporter: Tobias Frost
This bug was orginially reported in the Debian BTS,
https://bugs.debian.org/548074
As I could not find the bug here, I assume it has not been reported. Otherwise,
please just let me know the reference :)
Best regards,
Tobias Frost
Debian BTS Text:
Package: liblog4cxx10
Version: 0.10.0-1
Severity: normal
In a multithreaded program, POSIX signals are sent to an arbitrary
thread that hasn't blocked them via sigprocmask(). This means that
when it matters which thread gets the signal -- for instance, if
sigwait() is being used to serialize signals -- the program must ensure
that every other thread has blocked the signal in question. Otherwise,
the signal might be delivered to the wrong thread and lost.
liblog4cxx automatically starts threads sometimes, and it doesn't
adjust their thread masks. It really should block out every signal
that it isn't interested in itself, so that programs using sigwait()
can also use log4cxx.
See also #547212.
Daniel
-- System Information:
Debian Release: squeeze/sid
APT prefers unstable
APT policy: (500, 'unstable'), (1, 'experimental')
Architecture: i386 (i686)
Kernel: Linux 2.6.30-1-686 (SMP w/2 CPU cores)
Locale: LANG=en_US.UTF-8, LC_CTYPE=en_US.UTF-8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/bash
Versions of packages liblog4cxx10 depends on:
ii libapr1 1.3.8-1 The Apache Portable Runtime Librar
ii libaprutil1 1.3.9+dfsg-1 The Apache Portable Runtime Utilit
ii libc6 2.9-26 GNU C Library: Shared libraries
ii libgcc1 1:4.4.1-3 GCC support library
ii libstdc++6 4.4.1-3 The GNU Standard C++ Library v3
ii libuuid1 2.16-3 Universally Unique ID library
liblog4cxx10 recommends no packages.
liblog4cxx10 suggests no packages.
-- no debconf information
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