tools lib traceevent: If %s is a pointer, check printk formats

If the format string of TP_printk() contains a %s, and the argument is
not a string, check if the argument is a pointer that might match the
printk_formats that were stored.

Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Link: http://lkml.kernel.org/r/20131101215500.698924777@goodmis.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

1 files changed, 7 insertions, 1 deletions

diff --git a/tools/lib/traceevent/event-parse.c b/tools/lib/traceevent/event-parse.c
index 856b79105abc..013c8d3db806 100644
--- a/tools/lib/traceevent/event-parse.c
+++ b/tools/lib/traceevent/event-parse.c
@@ -3505,6 +3505,7 @@ static void print_str_arg(struct trace_seq *s, void *data, int size,
         struct pevent *pevent = event->pevent;
         struct print_flag_sym *flag;
         struct format_field *field;
+        struct printk_map *printk;
         unsigned long long val, fval;
         unsigned long addr;
         char *str;
@@ -3540,7 +3541,12 @@ static void print_str_arg(struct trace_seq *s, void *data, int size,
                 if (!(field->flags & FIELD_IS_ARRAY) &&
                     field->size == pevent->long_size) {
                         addr = *(unsigned long *)(data + field->offset);
-                        trace_seq_printf(s, "%lx", addr);
+                        /* Check if it matches a print format */
+                        printk = find_printk(pevent, addr);
+                        if (printk)
+                                trace_seq_puts(s, printk->printk);
+                        else
+                                trace_seq_printf(s, "%lx", addr);
                         break;
                 }
                 str = malloc(len + 1);