tracing/events: Add 'signed' field to format files

The sign info used for filters in the kernel is also useful to
applications that process the trace stream.  Add it to the format
files and make it available to userspace.

Signed-off-by: Tom Zanussi <tzanussi@gmail.com>
Acked-by: Frederic Weisbecker <fweisbec@gmail.com>
Cc: rostedt@goodmis.org
Cc: lizf@cn.fujitsu.com
Cc: hch@infradead.org
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
LKML-Reference: <1254809398-8078-2-git-send-email-tzanussi@gmail.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

1 files changed, 9 insertions, 6 deletions

diff --git a/include/trace/ftrace.h b/include/trace/ftrace.h
index cc0d9667e182..c9bbcab95fbe 100644
--- a/include/trace/ftrace.h
+++ b/include/trace/ftrace.h
@@ -120,9 +120,10 @@
 #undef __field
 #define __field(type, item)                                     \
         ret = trace_seq_printf(s, "\tfield:" #type " " #item ";\t"      \
-                               "offset:%u;\tsize:%u;\n",                \
+                               "offset:%u;\tsize:%u;\tsigned:%u;\n",    \
                                (unsigned int)offsetof(typeof(field), item), \
-                               (unsigned int)sizeof(field.item));       \
+                               (unsigned int)sizeof(field.item),        \
+                               (unsigned int)is_signed_type(type));     \
         if (!ret)                                                       \
                 return 0;
 
@@ -132,19 +133,21 @@
 #undef __array
 #define __array(type, item, len)                                                \
         ret = trace_seq_printf(s, "\tfield:" #type " " #item "[" #len "];\t"    \
-                               "offset:%u;\tsize:%u;\n",                \
+                               "offset:%u;\tsize:%u;\tsigned:%u;\n",    \
                                (unsigned int)offsetof(typeof(field), item), \
-                               (unsigned int)sizeof(field.item));       \
+                               (unsigned int)sizeof(field.item),        \
+                               (unsigned int)is_signed_type(type));     \
         if (!ret)                                                       \
                 return 0;
 
 #undef __dynamic_array
 #define __dynamic_array(type, item, len)                                       \
         ret = trace_seq_printf(s, "\tfield:__data_loc " #type "[] " #item ";\t"\
-                               "offset:%u;\tsize:%u;\n",                       \
+                               "offset:%u;\tsize:%u;\tsigned:%u;\n",           \
                                (unsigned int)offsetof(typeof(field),           \
                                         __data_loc_##item),                    \
-                               (unsigned int)sizeof(field.__data_loc_##item)); \
+                               (unsigned int)sizeof(field.__data_loc_##item), \
+                               (unsigned int)is_signed_type(type));     \
         if (!ret)                                                              \
                 return 0;