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Message-Id: <1386567251-22751-11-git-send-email-namhyung@kernel.org>
Date: Mon, 9 Dec 2013 14:34:07 +0900
From: Namhyung Kim <namhyung@...nel.org>
To: Arnaldo Carvalho de Melo <acme@...stprotocols.net>,
Steven Rostedt <rostedt@...dmis.org>
Cc: Frederic Weisbecker <fweisbec@...il.com>,
Ingo Molnar <mingo@...nel.org>, Jiri Olsa <jolsa@...hat.com>,
LKML <linux-kernel@...r.kernel.org>,
Namhyung Kim <namhyung.kim@....com>
Subject: [PATCH 10/14] tools lib traceevent: Get rid of die() in reparent_op_arg()
To do that, add FILTER_VAL_ERROR to enum filter_vals and make the
function returns the error code. Also pass error_str so that it can
set proper error message when error occurred.
Signed-off-by: Namhyung Kim <namhyung@...nel.org>
---
tools/lib/traceevent/parse-filter.c | 91 +++++++++++++++++++++++--------------
1 file changed, 58 insertions(+), 33 deletions(-)
diff --git a/tools/lib/traceevent/parse-filter.c b/tools/lib/traceevent/parse-filter.c
index a1ad609a860f..dabae52bbbcb 100644
--- a/tools/lib/traceevent/parse-filter.c
+++ b/tools/lib/traceevent/parse-filter.c
@@ -781,17 +781,21 @@ enum filter_vals {
FILTER_VAL_NORM,
FILTER_VAL_FALSE,
FILTER_VAL_TRUE,
+ FILTER_VAL_ERROR,
};
-void reparent_op_arg(struct filter_arg *parent, struct filter_arg *old_child,
- struct filter_arg *arg)
+enum filter_vals
+reparent_op_arg(struct filter_arg *parent, struct filter_arg *old_child,
+ struct filter_arg *arg, char **error_str)
{
struct filter_arg *other_child;
struct filter_arg **ptr;
if (parent->type != FILTER_ARG_OP &&
- arg->type != FILTER_ARG_OP)
- die("can not reparent other than OP");
+ arg->type != FILTER_ARG_OP) {
+ show_error(error_str, "can not reparent other than OP");
+ return FILTER_VAL_ERROR;
+ }
/* Get the sibling */
if (old_child->op.right == arg) {
@@ -800,8 +804,10 @@ void reparent_op_arg(struct filter_arg *parent, struct filter_arg *old_child,
} else if (old_child->op.left == arg) {
ptr = &old_child->op.left;
other_child = old_child->op.right;
- } else
- die("Error in reparent op, find other child");
+ } else {
+ show_error(error_str, "Error in reparent op, find other child");
+ return FILTER_VAL_ERROR;
+ }
/* Detach arg from old_child */
*ptr = NULL;
@@ -812,21 +818,25 @@ void reparent_op_arg(struct filter_arg *parent, struct filter_arg *old_child,
*parent = *arg;
/* Free arg without recussion */
free(arg);
- return;
+ return FILTER_VAL_NORM;
}
if (parent->op.right == old_child)
ptr = &parent->op.right;
else if (parent->op.left == old_child)
ptr = &parent->op.left;
- else
- die("Error in reparent op");
+ else {
+ show_error(error_str, "Error in reparent op");
+ return FILTER_VAL_ERROR;
+ }
*ptr = arg;
free_arg(old_child);
+ return FILTER_VAL_NORM;
}
-enum filter_vals test_arg(struct filter_arg *parent, struct filter_arg *arg)
+enum filter_vals test_arg(struct filter_arg *parent, struct filter_arg *arg,
+ char **error_str)
{
enum filter_vals lval, rval;
@@ -843,63 +853,68 @@ enum filter_vals test_arg(struct filter_arg *parent, struct filter_arg *arg)
return FILTER_VAL_NORM;
case FILTER_ARG_EXP:
- lval = test_arg(arg, arg->exp.left);
+ lval = test_arg(arg, arg->exp.left, error_str);
if (lval != FILTER_VAL_NORM)
return lval;
- rval = test_arg(arg, arg->exp.right);
+ rval = test_arg(arg, arg->exp.right, error_str);
if (rval != FILTER_VAL_NORM)
return rval;
return FILTER_VAL_NORM;
case FILTER_ARG_NUM:
- lval = test_arg(arg, arg->num.left);
+ lval = test_arg(arg, arg->num.left, error_str);
if (lval != FILTER_VAL_NORM)
return lval;
- rval = test_arg(arg, arg->num.right);
+ rval = test_arg(arg, arg->num.right, error_str);
if (rval != FILTER_VAL_NORM)
return rval;
return FILTER_VAL_NORM;
case FILTER_ARG_OP:
if (arg->op.type != FILTER_OP_NOT) {
- lval = test_arg(arg, arg->op.left);
+ lval = test_arg(arg, arg->op.left, error_str);
switch (lval) {
case FILTER_VAL_NORM:
break;
case FILTER_VAL_TRUE:
if (arg->op.type == FILTER_OP_OR)
return FILTER_VAL_TRUE;
- rval = test_arg(arg, arg->op.right);
+ rval = test_arg(arg, arg->op.right, error_str);
if (rval != FILTER_VAL_NORM)
return rval;
- reparent_op_arg(parent, arg, arg->op.right);
- return FILTER_VAL_NORM;
+ return reparent_op_arg(parent, arg, arg->op.right,
+ error_str);
case FILTER_VAL_FALSE:
if (arg->op.type == FILTER_OP_AND)
return FILTER_VAL_FALSE;
- rval = test_arg(arg, arg->op.right);
+ rval = test_arg(arg, arg->op.right, error_str);
if (rval != FILTER_VAL_NORM)
return rval;
- reparent_op_arg(parent, arg, arg->op.right);
- return FILTER_VAL_NORM;
+ return reparent_op_arg(parent, arg, arg->op.right,
+ error_str);
+
+ case FILTER_VAL_ERROR:
+ return FILTER_VAL_ERROR;
}
}
- rval = test_arg(arg, arg->op.right);
+ rval = test_arg(arg, arg->op.right, error_str);
switch (rval) {
case FILTER_VAL_NORM:
+ case FILTER_VAL_ERROR:
break;
+
case FILTER_VAL_TRUE:
if (arg->op.type == FILTER_OP_OR)
return FILTER_VAL_TRUE;
if (arg->op.type == FILTER_OP_NOT)
return FILTER_VAL_FALSE;
- reparent_op_arg(parent, arg, arg->op.left);
- return FILTER_VAL_NORM;
+ return reparent_op_arg(parent, arg, arg->op.left,
+ error_str);
case FILTER_VAL_FALSE:
if (arg->op.type == FILTER_OP_AND)
@@ -907,26 +922,27 @@ enum filter_vals test_arg(struct filter_arg *parent, struct filter_arg *arg)
if (arg->op.type == FILTER_OP_NOT)
return FILTER_VAL_TRUE;
- reparent_op_arg(parent, arg, arg->op.left);
- return FILTER_VAL_NORM;
+ return reparent_op_arg(parent, arg, arg->op.left,
+ error_str);
}
- return FILTER_VAL_NORM;
+ return rval;
default:
- die("bad arg in filter tree");
+ show_error(error_str, "bad arg in filter tree");
+ return FILTER_VAL_ERROR;
}
return FILTER_VAL_NORM;
}
/* Remove any unknown event fields */
-static struct filter_arg *collapse_tree(struct filter_arg *arg)
+static struct filter_arg *collapse_tree(struct filter_arg *arg, char **error_str)
{
enum filter_vals ret;
- ret = test_arg(arg, arg);
+ ret = test_arg(arg, arg, error_str);
switch (ret) {
case FILTER_VAL_NORM:
- return arg;
+ break;
case FILTER_VAL_TRUE:
case FILTER_VAL_FALSE:
@@ -935,7 +951,16 @@ static struct filter_arg *collapse_tree(struct filter_arg *arg)
if (arg) {
arg->type = FILTER_ARG_BOOLEAN;
arg->boolean.value = ret == FILTER_VAL_TRUE;
+ } else {
+ show_error(error_str, "Failed to allocate filter arg");
}
+ break;
+
+ case FILTER_VAL_ERROR:
+ /* test_arg() already set the error_str */
+ free_arg(arg);
+ arg = NULL;
+ break;
}
return arg;
@@ -1151,9 +1176,9 @@ process_filter(struct event_format *event, struct filter_arg **parg,
if (!current_op)
current_op = current_exp;
- current_op = collapse_tree(current_op);
+ current_op = collapse_tree(current_op, error_str);
if (current_op == NULL)
- goto fail_alloc;
+ goto fail;
*parg = current_op;
--
1.7.11.7
--
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