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authorSteven Rostedt (VMware) <rostedt@goodmis.org>2020-03-24 16:08:47 -0400
committerArnaldo Carvalho de Melo <acme@redhat.com>2020-06-18 10:22:27 -0300
commit74621d929d944529a5e2878a84f48bfa6fb69a66 (patch)
treedcbee1bfc40bdce9993dc99e9049b867f5daec9e /tools/lib
parent27d4d336f2872193e90ee5450559e1699fae0f6d (diff)
downloadlinux-74621d929d944529a5e2878a84f48bfa6fb69a66.tar.bz2
tools lib traceevent: Handle __attribute__((user)) in field names
Commit c61f13eaa1ee1 ("gcc-plugins: Add structleak for more stack initialization") added "__attribute__((user))" to the user when stackleak detector is enabled. This now appears in the field format of system call trace events for system calls that have user buffers. The "__attribute__((user))" breaks the parsing in libtraceevent. That needs to be handled. Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org> Cc: Andrew Morton <akpm@linux-foundation.org> Cc: Jaewon Kim <jaewon31.kim@samsung.com> Cc: Jiri Olsa <jolsa@redhat.com> Cc: Kees Kook <keescook@chromium.org> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Vlastimil Babka <vbabka@suse.cz> Cc: linux-mm@kvack.org Cc: linux-trace-devel@vger.kernel.org Link: http://lore.kernel.org/lkml/20200324200956.663647256@goodmis.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Diffstat (limited to 'tools/lib')
-rw-r--r--tools/lib/traceevent/event-parse.c39
1 files changed, 38 insertions, 1 deletions
diff --git a/tools/lib/traceevent/event-parse.c b/tools/lib/traceevent/event-parse.c
index eec96c31ea9e..010e60d5a081 100644
--- a/tools/lib/traceevent/event-parse.c
+++ b/tools/lib/traceevent/event-parse.c
@@ -1444,6 +1444,7 @@ static int event_read_fields(struct tep_event *event, struct tep_format_field **
enum tep_event_type type;
char *token;
char *last_token;
+ char *delim = " ";
int count = 0;
int ret;
@@ -1504,13 +1505,49 @@ static int event_read_fields(struct tep_event *event, struct tep_format_field **
field->flags |= TEP_FIELD_IS_POINTER;
if (field->type) {
- ret = append(&field->type, " ", last_token);
+ ret = append(&field->type, delim, last_token);
free(last_token);
if (ret < 0)
goto fail;
} else
field->type = last_token;
last_token = token;
+ delim = " ";
+ continue;
+ }
+
+ /* Handle __attribute__((user)) */
+ if ((type == TEP_EVENT_DELIM) &&
+ strcmp("__attribute__", last_token) == 0 &&
+ token[0] == '(') {
+ int depth = 1;
+ int ret;
+
+ ret = append(&field->type, " ", last_token);
+ ret |= append(&field->type, "", "(");
+ if (ret < 0)
+ goto fail;
+
+ delim = " ";
+ while ((type = read_token(&token)) != TEP_EVENT_NONE) {
+ if (type == TEP_EVENT_DELIM) {
+ if (token[0] == '(')
+ depth++;
+ else if (token[0] == ')')
+ depth--;
+ if (!depth)
+ break;
+ ret = append(&field->type, "", token);
+ delim = "";
+ } else {
+ ret = append(&field->type, delim, token);
+ delim = " ";
+ }
+ if (ret < 0)
+ goto fail;
+ free(last_token);
+ last_token = token;
+ }
continue;
}
break;