Hiroshi Ito <ito@mlb.co.jp> fix division by 0

git-svn-id: svn://svn.berlios.de/openocd/trunk@1416 b42882b7-edfa-0310-969c-e2dbd0fdcd60

diff --git a/src/target/trace.c b/src/target/trace.c
index 257e8ceb8a767946fe655acf67b4b8d5d42fcbc9..93925cd1a4827e5a2eba46b95adaf133f932fd7a 100644 (file)
--- a/src/target/trace.c
+++ b/src/target/trace.c
@@ -128,7 +128,11 @@ int handle_trace_history_command(struct command_context_s *cmd_ctx, char *cmd, c
                int i;
                int first = 0;
                int last = trace->trace_history_pos;
-               
+
+               if ( !trace->trace_history_size ) {
+                       command_print(cmd_ctx, "trace history buffer is not allocated");
+                       return ERROR_OK;
+               }
                if (trace->trace_history_overflowed)
                {
                        first = trace->trace_history_pos;