backtrace_fns       7 tools/build/feature/test-backtrace.c 	void *backtrace_fns[10];
backtrace_fns      10 tools/build/feature/test-backtrace.c 	entries = backtrace(backtrace_fns, 10);
backtrace_fns      11 tools/build/feature/test-backtrace.c 	backtrace_symbols_fd(backtrace_fns, entries, 1);