perf tools: Fix bprintk reading in trace output

The bprintk parsing was broken in more ways than one.

The file parsing was incorrect, and the words used by the
arguments are always 4 bytes aligned, even on 64-bit machines.

Signed-off-by: Steven Rostedt <srostedt@redhat.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
LKML-Reference: <20091014194359.520931637@goodmis.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

1 files changed, 7 insertions, 8 deletions

diff --git a/tools/perf/util/trace-event-parse.c b/tools/perf/util/trace-event-parse.c
index eda0a2488c19..93a82fead958 100644
--- a/tools/perf/util/trace-event-parse.c
+++ b/tools/perf/util/trace-event-parse.c
@@ -284,18 +284,16 @@ void parse_ftrace_printk(char *file, unsigned int size __unused)
         char *line;
         char *next = NULL;
         char *addr_str;
-        int ret;
+        char *fmt;
         int i;
 
         line = strtok_r(file, "\n", &next);
         while (line) {
                 item = malloc_or_die(sizeof(*item));
-                ret = sscanf(line, "%as : %as",
-                             (float *)(void *)&addr_str, /* workaround gcc warning */
-                             (float *)(void *)&item->printk);
+                addr_str = strtok_r(line, ":", &fmt);
                 item->addr = strtoull(addr_str, NULL, 16);
-                free(addr_str);
-
+                /* fmt still has a space, skip it */
+                item->printk = strdup(fmt+1);
                 item->next = list;
                 list = item;
                 line = strtok_r(NULL, "\n", &next);
@@ -2274,8 +2272,9 @@ static struct print_arg *make_bprint_args(char *fmt, void *data, int size, struc
                         case 'u':
                         case 'x':
                         case 'i':
-                                bptr = (void *)(((unsigned long)bptr + (long_size - 1)) &
-                                                ~(long_size - 1));
+                                /* the pointers are always 4 bytes aligned */
+                                bptr = (void *)(((unsigned long)bptr + 3) &
+                                                ~3);
                                 switch (ls) {
                                 case 0:
                                 case 1: