From bb0ef230ca707252cbab93f1eb944b284a3c1e1d Mon Sep 17 00:00:00 2001 From: Paul Fertser Date: Tue, 4 Feb 2014 16:07:57 +0400 Subject: [PATCH] tcl/drscan: handle invalid syntax with a conditional, not assert When "drscan" command is used improperly, such as in: drscan stm32f1x.cpu -endstate drpause there're no fields to scan, and so the assert leads to a segfault. This should be treated like any other syntax error instead. Change-Id: Id1743f5d641038e1e3754c6f3097aabc5d1916b9 Signed-off-by: Paul Fertser Reviewed-on: http://openocd.zylin.com/1927 Tested-by: jenkins Reviewed-by: Spencer Oliver --- src/jtag/tcl.c | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) diff --git a/src/jtag/tcl.c b/src/jtag/tcl.c index ceea19303c..dd2be1e5ad 100644 --- a/src/jtag/tcl.c +++ b/src/jtag/tcl.c @@ -169,7 +169,10 @@ static int Jim_Command_drscan(Jim_Interp *interp, int argc, Jim_Obj *const *args return JIM_ERR; num_fields = (argc-2)/2; - assert(num_fields > 0); + if (num_fields <= 0) { + Jim_SetResultString(interp, "drscan: no scan fields supplied", -1); + return JIM_ERR; + } fields = malloc(sizeof(struct scan_field) * num_fields); for (i = 2; i < argc; i += 2) { long bits; -- 2.30.2