From 6978871366465aac849a303b2ea05ff5ab602261 Mon Sep 17 00:00:00 2001 From: Mark Wielaard Date: Tue, 30 Apr 2019 20:36:39 +0200 Subject: [PATCH] tests: Don't printf a known NULL symname. GCC9 on 32bit systems might warn about '%s' directive argument is null for symname in backtrace.c. Just check whether symname is NULL. Signed-off-by: Mark Wielaard --- tests/ChangeLog | 4 ++++ tests/backtrace.c | 2 +- 2 files changed, 5 insertions(+), 1 deletion(-) diff --git a/tests/backtrace.c b/tests/backtrace.c index ecf55830..36c8b8c4 100644 --- a/tests/backtrace.c +++ b/tests/backtrace.c @@ -185,7 +185,7 @@ frame_callback (Dwfl_Frame *state, void *frame_arg) symname = dwfl_module_addrname (mod, pc_adjusted); printf ("#%2d %#" PRIx64 "%4s\t%s\n", *framenop, (uint64_t) pc, - ! isactivation ? "- 1" : "", symname); + ! isactivation ? "- 1" : "", symname ?: ""); pid_t tid = dwfl_thread_tid (thread); callback_verify (tid, *framenop, pc, symname, dwfl); (*framenop)++; -- 2.21.0