diff options
| author | Steven Rostedt (VMware) <rostedt@goodmis.org> | 2018-01-11 19:47:51 -0500 |
|---|---|---|
| committer | Arnaldo Carvalho de Melo <acme@redhat.com> | 2018-01-17 10:23:21 -0300 |
| commit | d777f8de99b05d399c0e4e51cdce016f26bd971b (patch) | |
| tree | 4c9076efb8208328bde65360967241bf37aa1a7e /tools/lib | |
| parent | 806efaed3cacab1521895d20bb3b5ed610909299 (diff) | |
tools lib traceevent: Fix get_field_str() for dynamic strings
If a field is a dynamic string, get_field_str() returned just the
offset/size value and not the string. Have it parse the offset/size
correctly to return the actual string. Otherwise filtering fails when
trying to filter fields that are dynamic strings.
Reported-by: Gopanapalli Pradeep <prap_hai@yahoo.com>
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
Acked-by: Namhyung Kim <namhyung@kernel.org>
Cc: Andrew Morton <akpm@linux-foundation.org>
Link: http://lkml.kernel.org/r/20180112004823.146333275@goodmis.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Diffstat (limited to 'tools/lib')
| -rw-r--r-- | tools/lib/traceevent/parse-filter.c | 10 |
1 files changed, 9 insertions, 1 deletions
diff --git a/tools/lib/traceevent/parse-filter.c b/tools/lib/traceevent/parse-filter.c index 2b9048f90bae..431e8b309f6e 100644 --- a/tools/lib/traceevent/parse-filter.c +++ b/tools/lib/traceevent/parse-filter.c @@ -1877,17 +1877,25 @@ static const char *get_field_str(struct filter_arg *arg, struct pevent_record *r struct pevent *pevent; unsigned long long addr; const char *val = NULL; + unsigned int size; char hex[64]; /* If the field is not a string convert it */ if (arg->str.field->flags & FIELD_IS_STRING) { val = record->data + arg->str.field->offset; + size = arg->str.field->size; + + if (arg->str.field->flags & FIELD_IS_DYNAMIC) { + addr = *(unsigned int *)val; + val = record->data + (addr & 0xffff); + size = addr >> 16; + } /* * We need to copy the data since we can't be sure the field * is null terminated. */ - if (*(val + arg->str.field->size - 1)) { + if (*(val + size - 1)) { /* copy it */ memcpy(arg->str.buffer, val, arg->str.field->size); /* the buffer is already NULL terminated */ |