tools lib traceevent: Get rid of die() in add_right()

Refactor it to return appropriate pevent_errno value.

Signed-off-by: Namhyung Kim <namhyung@kernel.org>
Reviewed-by: Steven Rostedt <rostedt@goodmis.org>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Namhyung Kim <namhyung.kim@lge.com>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Steven Rostedt <rostedt@goodmis.org>
Link: http://lkml.kernel.org/r/1386833777-3790-7-git-send-email-namhyung@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

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 *