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authorSteven Rostedt <srostedt@redhat.com>2012-05-22 14:45:21 +0900
committerNamhyung Kim <namhyung@kernel.org>2012-07-04 13:40:30 +0900
commite84c282b40251f314c429f39b044785e323f2648 (patch)
treeb9211cae3213ad8b1d771363068ab3eda5ac3dc0 /tools
parent17d7a1123f0f6d532830152564cc812cc73db2f3 (diff)
tools lib traceevent: Let filtering numbers by string use function names
As a pointer can be converted into a function name, let the filters work with the function name as well as with the pointer number. If the comparison expects a string, then convert numbers into functions, but only when the number is the same size as a long. Signed-off-by: Steven Rostedt <rostedt@goodmis.org> Link: http://lkml.kernel.org/n/tip-oxsa1qkr2eq7u8d7r0aapedu@git.kernel.org Signed-off-by: Namhyung Kim <namhyung@kernel.org>
Diffstat (limited to 'tools')
-rw-r--r--tools/lib/traceevent/parse-filter.c45
1 files changed, 35 insertions, 10 deletions
diff --git a/tools/lib/traceevent/parse-filter.c b/tools/lib/traceevent/parse-filter.c
index dfcfe2c131de..80d872a81f26 100644
--- a/tools/lib/traceevent/parse-filter.c
+++ b/tools/lib/traceevent/parse-filter.c
@@ -1710,18 +1710,43 @@ static int test_num(struct event_format *event,
static const char *get_field_str(struct filter_arg *arg, struct pevent_record *record)
{
- const char *val = record->data + arg->str.field->offset;
+ struct event_format *event;
+ struct pevent *pevent;
+ unsigned long long addr;
+ const char *val = NULL;
+ char hex[64];
- /*
- * We need to copy the data since we can't be sure the field
- * is null terminated.
- */
- if (*(val + arg->str.field->size - 1)) {
- /* copy it */
- memcpy(arg->str.buffer, val, arg->str.field->size);
- /* the buffer is already NULL terminated */
- val = arg->str.buffer;
+ /* If the field is not a string convert it */
+ if (arg->str.field->flags & FIELD_IS_STRING) {
+ val = record->data + arg->str.field->offset;
+
+ /*
+ * We need to copy the data since we can't be sure the field
+ * is null terminated.
+ */
+ if (*(val + arg->str.field->size - 1)) {
+ /* copy it */
+ memcpy(arg->str.buffer, val, arg->str.field->size);
+ /* the buffer is already NULL terminated */
+ val = arg->str.buffer;
+ }
+
+ } else {
+ event = arg->str.field->event;
+ pevent = event->pevent;
+ addr = get_value(event, arg->str.field, record);
+
+ if (arg->str.field->flags & (FIELD_IS_POINTER | FIELD_IS_LONG))
+ /* convert to a kernel symbol */
+ val = pevent_find_function(pevent, addr);
+
+ if (val == NULL) {
+ /* just use the hex of the string name */
+ snprintf(hex, 64, "0x%llx", addr);
+ val = hex;
+ }
}
+
return val;
}