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tests: Don't printf a known NULL symname in backtrace-dwarf.c.

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GCC9 on 32bit systems might warn about '%s' directive argument is null
for symname in backtrace-dwarf.c. Just check whether symname is NULL.

This is an identical fix for the same issue as found in backtrace.c,
but now in backtrace-dwarf.c

Signed-off-by: Mark Wielaard <mark@klomp.org>
This commit is contained in:
Mark Wielaard
2019-04-30 20:48:13 +02:00
parent 6978871366
commit 62bed20182
2 changed files with 6 additions and 1 deletions
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tests/ChangeLog
+5
View File
@@ -1,3 +1,8 @@
2019-04-30 Mark Wielaard <mark@klomp.org>
* backtrace-dwarf.c (frame_callback): Explicitly check symname is
NULL.
2019-04-30 Mark Wielaard <mark@klomp.org>
* backtrace.c (frame_callback): Explicitly check symname is NULL.
tests/backtrace-dwarf.c
+1 -1
View File
@@ -101,7 +101,7 @@ frame_callback (Dwfl_Frame *state, void *frame_arg)
if (mod)
symname = dwfl_module_addrname (mod, pc_adjusted);
printf ("%#" PRIx64 "\t%s\n", (uint64_t) pc, symname);
printf ("%#" PRIx64 "\t%s\n", (uint64_t) pc, symname ?: "<null>");
if (symname && (strcmp (symname, "main") == 0
|| strcmp (symname, ".main") == 0))