From cf10427caa55be47a6c93976883b595cf2c5be52 Mon Sep 17 00:00:00 2001
From: oharboe <oharboe@b42882b7-edfa-0310-969c-e2dbd0fdcd60>
Date: Wed, 18 Mar 2009 11:43:09 +0000
Subject: [PATCH] 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
---
 src/target/trace.c | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/src/target/trace.c b/src/target/trace.c
index 257e8ceb8..93925cd1a 100644
--- 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;