_bsearch 157 tools/perf/tests/dwarf-unwind.c void *(*volatile _bsearch)(void *, void *, size_t, _bsearch 160 tools/perf/tests/dwarf-unwind.c _bsearch = fp; _bsearch 161 tools/perf/tests/dwarf-unwind.c _bsearch(array, &thread, 2, sizeof(struct thread **),