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Research software . Software . 2022

sosy-lab/benchexec: Release 2.5

Philipp Wendler; Dirk Beyer; Aditya Arora;
Open Access
Abstract
This release does not add new features compared to BenchExec 1.22, but removes several deprecated features and brings several other backwards-incompatible changes to make BenchExec more consistent and user-friendly: Support for Python 3.2 and 3.3 is removed, the minimal Python version is now 3.4. Additionally, runexec/RunExecutor continue to support Python 2.7 until end of 2019. Support for running benchmarks as a different user with sudo is removed (parameters --user/--users). Use container mode as better method for isolating runs. Container mode is enabled by default. It can be disabled with --no-container, but this decreases reliability of benchmarking. If the cpuacct cgroup is not available, CPU-time measurements and limits are not supported. Either container mode or the freezer cgroup are required to ensure protection against fork bombs. Niceness of benchmarked process is not changed, previously it was increased by 5. Changes to input of benchexec: The memory limit given to benchexec requires an explicitly specified unit. Support for <test> tags, <sourcefiles> tags, and variables named ${sourcefile_*} removed from benchmark definitions. Use <rundefinition>, <tasks>, and ${inputfile_*} instead. Variables named ${taskdef_*} are defined only if task-definition files are used, and variables named ${inputfile_*} only otherwise. Changes to table-generator: A column named memUsage is automatically renamed to memory. A column named memory is automatically converted to Megabytes. Both conversions are only applied if no <column> tags are used. Changes to run-result data: In case of aborted or failed runs, no dummy results (e.g., cputime of 0s) are present. The memory results of benchexec are named memory, not memUsage. Memory results have the unit B explicitly specified. Furthermore, units are present in all attributes of the result XML files where they were still missing. Result item exitcode is removed, only RunExecutor.execute_run() still returns it, but as an object instance instead of an int. Use returnvalue and exitsignal instead. Module benchexec.test_tool_wrapper is removed, use benchexec.test_tool_info instead. BenchExec (both benchexec and runexec) terminates itself cleanly after aborting all runs if it receives one of the signals SIGTERM, SIGINT (Ctrl+C), or SIGQUIT. Additionally, this release adds a fix for the container that is used since BenchExec 1.20 for the tool-info module. In this container, the environment variable HOME did not point to /home/benchexec as expected but to the user's real home directory. This broke tools like Ultimate if the /home was configured to be hidden or read-only. Furthermore, we declare the following features deprecated and plan on removing them for BenchExec 3.0, which is expected to be released in January 2020: Support for Python 2.7 and 3.4 (cf. #438) Support for checking correctness of run results and computing scores if task-definition files are not used (cf. #439) Please respond in the respective issue if one of these deprecations is a problem for you.
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