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Score-P Symbol Injector

Support library for Score-P that identifies and registers symbols from shared libraries. Currently, works only on Linux.

Requirements

  • Score-P
  • LLVM (for testing purposes)
  • CMake (>=3.15)

Building

mkdir build && cd build
cmake -G Ninja -DLLVM_DIR="path/to/llvm/" -DSCOREP_PATH="path/to/scorep" ..
ninja

(works with make too)

Usage

Simply link the the libsymbol_injector.so library into the instrumented executable along with the required Score-P dependencies. Provide the name of your excutbale in the environment variable SCOREP_EXECUTABLE.

At startup, the library will query /proc/self/maps to identify the memory mapping of shared libraries. All visible function symbols are then identified with nm and registered in Score-P.

There maybe a slight overhead in Score-P's address lookup mechanism, because there are potentially a lot of unneeded functions registered. In the future, support for function filtering will be added.

See test/shared_lib_test.c for a basic example.