LLVM Instrumentation Pass and Scheduler for recording the execution of multithreaded programs and replaying them under a given thread interleaving.
Record-Replay uses cpp-utils as a submodule. Therefore, clone recursively:
git clone --recursive https://github.com/s-vde/record-replay.git
The Instrumentation Pass needs to be built against the LLVM Pass Framework. It is currently tested with LLVM and Clang version 6.0. Scripts for downloading/cloning and building the LLVM Suite, the Clang frontend and required tools with the right configuration can be found in the repository llvm-pass-development-scripts.
Once you have a build of the LLVM Pass Framework, Record-Replay can be built using cmake. By default the build process will look for and use an installed LLVM. A custom built LLVM can be specified as follows:
cmake -DLLVM_BUILD_DIR=<path_to_llvm_build_dir>
The API for instrumenting a program is provided in src/scheduler/replay.hpp is as follows:
boost::filesystem::path instrument(const program_t& program_source,
const boost::filesystem::path& output_dir,
const std::string& optimization_level = "0",
const std::string& compiler_options = "");
The returned path is the path to the instrumented executable.
When the instrumented program <output_dir>/<input_program.filename> is run, it expects the following files (relative to the place from where it is run):
schedules/schedule.txt: containing the schedule under which the program is to be run (e.g.<0,0,1,1>)schedules/settings.txt: containing the name of the strategy for selecting the next thread, if not by schedule. The builtin strategies areRandomandNonPreemptive.