+
+static char *
+backtrace_format(const struct backtrace *b, struct ds *ds)
+{
+ if (b->n_frames) {
+ int i;
+
+ ds_put_cstr(ds, " (backtrace:");
+ for (i = 0; i < b->n_frames; i++) {
+ ds_put_format(ds, " 0x%08"PRIxPTR, b->frames[i]);
+ }
+ ds_put_cstr(ds, ")");
+ }
+
+ return ds_cstr(ds);
+}
+
+void
+log_backtrace_at(const char *msg, const char *where)
+{
+ struct backtrace b;
+ struct ds ds = DS_EMPTY_INITIALIZER;
+
+ backtrace_capture(&b);
+ if (msg) {
+ ds_put_format(&ds, "%s ", msg);
+ }
+
+ ds_put_cstr(&ds, where);
+ VLOG_ERR("%s", backtrace_format(&b, &ds));
+
+ ds_destroy(&ds);
+}