* [PATCH] tests: skip '(null)' symname frames in backtrace tests
@ 2023-03-04 21:35 Mark Wielaard
0 siblings, 0 replies; only message in thread
From: Mark Wielaard @ 2023-03-04 21:35 UTC (permalink / raw)
To: elfutils-devel; +Cc: Mark Wielaard
Some setups might have some frames for unknown (null) functions
in the thread backtrace. Skip these frames instead of failing
immediately.
* tests/backtrace.c (callback_verify): Check and skip nulls_seen.
https://sourceware.org/bugzilla/show_bug.cgi?id=29176
Signed-off-by: Mark Wielaard <mark@klomp.org>
---
tests/backtrace.c | 8 ++++++++
1 file changed, 8 insertions(+)
diff --git a/tests/backtrace.c b/tests/backtrace.c
index afc12fb9..55555301 100644
--- a/tests/backtrace.c
+++ b/tests/backtrace.c
@@ -90,6 +90,14 @@ callback_verify (pid_t tid, unsigned frameno, Dwarf_Addr pc,
return;
}
Dwfl_Module *mod;
+ /* Skip frames for which there isn't a function name. */
+ static int nulls_seen = 0;
+ if (symname == NULL)
+ {
+ nulls_seen++;
+ return;
+ }
+ frameno -= nulls_seen;
/* See case 4. Special case to help out simple frame pointer unwinders. */
static bool duplicate_sigusr2 = false;
if (duplicate_sigusr2)
--
2.31.1
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