[PATCH 06/14] tools lib traceevent: Get rid of die() in add_right()

From: Namhyung Kim
Date: Thu Dec 12 2013 - 02:37:50 EST


Refactor it to return appropriate pevent_errno value.

Reviewed-by: Steven Rostedt <rostedt@xxxxxxxxxxx>
Signed-off-by: Namhyung Kim <namhyung@xxxxxxxxxx>
---
tools/lib/traceevent/event-parse.h | 8 +++++++-
tools/lib/traceevent/parse-filter.c | 34 +++++++++++++++++++---------------
2 files changed, 26 insertions(+), 16 deletions(-)

diff --git a/tools/lib/traceevent/event-parse.h b/tools/lib/traceevent/event-parse.h
index abdfd3c606ed..89e4dfd40db6 100644
--- a/tools/lib/traceevent/event-parse.h
+++ b/tools/lib/traceevent/event-parse.h
@@ -358,7 +358,13 @@ enum pevent_flag {
_PE(OLD_FTRACE_ARG_FAILED,"failed to allocate field name for ftrace"),\
_PE(INVALID_ARG_TYPE, "invalid argument type"), \
_PE(INVALID_EVENT_NAME, "invalid event name"), \
- _PE(EVENT_NOT_FOUND, "No event found")
+ _PE(EVENT_NOT_FOUND, "no event found"), \
+ _PE(SYNTAX_ERROR, "syntax error"), \
+ _PE(ILLEGAL_RVALUE, "illegal rvalue"), \
+ _PE(ILLEGAL_LVALUE, "illegal lvalue for string comparison"), \
+ _PE(INVALID_REGEX, "regex did not compute"), \
+ _PE(ILLEGAL_STRING_CMP, "illegal comparison for string"), \
+ _PE(ILLEGAL_INTEGER_CMP,"illegal comparison for integer")

#undef _PE
#define _PE(__code, __str) PEVENT_ERRNO__ ## __code
diff --git a/tools/lib/traceevent/parse-filter.c b/tools/lib/traceevent/parse-filter.c
index a0ab040e8f71..c08ce594cabe 100644
--- a/tools/lib/traceevent/parse-filter.c
+++ b/tools/lib/traceevent/parse-filter.c
@@ -473,8 +473,8 @@ create_arg_cmp(enum filter_exp_type etype)
return arg;
}

-static int add_right(struct filter_arg *op, struct filter_arg *arg,
- char **error_str)
+static enum pevent_errno
+add_right(struct filter_arg *op, struct filter_arg *arg, char **error_str)
{
struct filter_arg *left;
char *str;
@@ -505,9 +505,8 @@ static int add_right(struct filter_arg *op, struct filter_arg *arg,
case FILTER_ARG_FIELD:
break;
default:
- show_error(error_str,
- "Illegal rvalue");
- return -1;
+ show_error(error_str, "Illegal rvalue");
+ return PEVENT_ERRNO__ILLEGAL_RVALUE;
}

/*
@@ -554,7 +553,7 @@ static int add_right(struct filter_arg *op, struct filter_arg *arg,
if (left->type != FILTER_ARG_FIELD) {
show_error(error_str,
"Illegal lvalue for string comparison");
- return -1;
+ return PEVENT_ERRNO__ILLEGAL_LVALUE;
}

/* Make sure this is a valid string compare */
@@ -573,25 +572,31 @@ static int add_right(struct filter_arg *op, struct filter_arg *arg,
show_error(error_str,
"RegEx '%s' did not compute",
str);
- return -1;
+ return PEVENT_ERRNO__INVALID_REGEX;
}
break;
default:
show_error(error_str,
"Illegal comparison for string");
- return -1;
+ return PEVENT_ERRNO__ILLEGAL_STRING_CMP;
}

op->type = FILTER_ARG_STR;
op->str.type = op_type;
op->str.field = left->field.field;
op->str.val = strdup(str);
- if (!op->str.val)
- die("malloc string");
+ if (!op->str.val) {
+ show_error(error_str, "Failed to allocate string filter");
+ return PEVENT_ERRNO__MEM_ALLOC_FAILED;
+ }
/*
* Need a buffer to copy data for tests
*/
- op->str.buffer = malloc_or_die(op->str.field->size + 1);
+ op->str.buffer = malloc(op->str.field->size + 1);
+ if (!op->str.buffer) {
+ show_error(error_str, "Failed to allocate string filter");
+ return PEVENT_ERRNO__MEM_ALLOC_FAILED;
+ }
/* Null terminate this buffer */
op->str.buffer[op->str.field->size] = 0;

@@ -609,7 +614,7 @@ static int add_right(struct filter_arg *op, struct filter_arg *arg,
case FILTER_CMP_NOT_REGEX:
show_error(error_str,
"Op not allowed with integers");
- return -1;
+ return PEVENT_ERRNO__ILLEGAL_INTEGER_CMP;

default:
break;
@@ -629,9 +634,8 @@ static int add_right(struct filter_arg *op, struct filter_arg *arg,
return 0;

out_fail:
- show_error(error_str,
- "Syntax error");
- return -1;
+ show_error(error_str, "Syntax error");
+ return PEVENT_ERRNO__SYNTAX_ERROR;
}

static struct filter_arg *
--
1.7.11.7

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