revalidator: Fix ukey stats cache updating.

[sliver-openvswitch.git] / lib / backtrace.c

diff --git a/lib/backtrace.c b/lib/backtrace.c
index 861a109..9b7c52b 100644 (file)
--- a/lib/backtrace.c
+++ b/lib/backtrace.c
@@ -15,8 +15,12 @@
  */
 
 #include <config.h>
+#include <inttypes.h>
 
 #include "backtrace.h"
+#include "vlog.h"
+
+VLOG_DEFINE_THIS_MODULE(backtrace);
 
 #ifdef HAVE_BACKTRACE
 #include <execinfo.h>
@@ -31,6 +35,7 @@ backtrace_capture(struct backtrace *b)
         b->frames[i] = (uintptr_t) frames[i];
     }
 }
+
 #else
 void
 backtrace_capture(struct backtrace *backtrace)
@@ -38,3 +43,36 @@ backtrace_capture(struct backtrace *backtrace)
     backtrace->n_frames = 0;
 }
 #endif
+
+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);
+}