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authorFrederic Weisbecker <fweisbec@gmail.com>2009-08-31 06:45:21 +0200
committerIngo Molnar <mingo@elte.hu>2009-08-31 10:04:49 +0200
commit561f732c1233f6bf7c3c5c5fb9b4d90bb6c107aa (patch)
tree3b1fa89421add9bf578b44d02e8503f90f286404 /tools/perf
parent9b8055a52c8986167e0a7357460d528a00db67e6 (diff)
perf tools: Complete support for dynamic strings
Complete support for __str_loc type strings of ftrace events which have dynamic offsets values set for each of them inside their sammples. Before: geany-5759 [000] 0.000000: lock_release: name geany-5759 [000] 0.000000: lock_release: name geany-5759 [000] 0.000000: lock_release: name kondemand/0-362 [000] 0.000000: lock_release: name pdflush-421 [000] 0.000000: lock_release: name After: geany-5759 [000] 0.000000: lock_release: &u->lock geany-5759 [000] 0.000000: lock_release: key geany-5759 [000] 0.000000: lock_release: &group->notification_mutex kondemand/0-362 [000] 0.000000: lock_release: &rq->lock pdflush-421 [000] 0.000000: lock_release: &rq->lock Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com> Cc: Frederic Weisbecker <fweisbec@gmail.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Arnaldo Carvalho de Melo <acme@redhat.com> Cc: Steven Rostedt <rostedt@goodmis.org> LKML-Reference: <1251693921-6579-4-git-send-email-fweisbec@gmail.com> Signed-off-by: Ingo Molnar <mingo@elte.hu> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Arnaldo Carvalho de Melo <acme@redhat.com> Cc: Steven Rostedt <rostedt@goodmis.org>
Diffstat (limited to 'tools/perf')
-rw-r--r--tools/perf/util/trace-event-parse.c16
-rw-r--r--tools/perf/util/trace-event.h1
2 files changed, 15 insertions, 2 deletions
diff --git a/tools/perf/util/trace-event-parse.c b/tools/perf/util/trace-event-parse.c
index 96c5e97ffe7b..665dac20cd1e 100644
--- a/tools/perf/util/trace-event-parse.c
+++ b/tools/perf/util/trace-event-parse.c
@@ -1548,6 +1548,7 @@ process_str(struct event *event __unused, struct print_arg *arg, char **tok)
arg->type = PRINT_STRING;
arg->string.string = token;
+ arg->string.offset = -1;
if (read_expected(EVENT_DELIM, (char *)")") < 0)
return EVENT_ERROR;
@@ -2031,9 +2032,20 @@ static void print_str_arg(void *data, int size,
case PRINT_TYPE:
break;
- case PRINT_STRING:
- printf("%s", arg->string.string);
+ case PRINT_STRING: {
+ int str_offset;
+
+ if (arg->string.offset == -1) {
+ struct format_field *f;
+
+ f = find_any_field(event, arg->string.string);
+ arg->string.offset = f->offset;
+ }
+ str_offset = *(int *)(data + arg->string.offset);
+ str_offset &= 0xffff;
+ printf("%s", ((char *)data) + str_offset);
break;
+ }
case PRINT_OP:
/*
* The only op for string should be ? :
diff --git a/tools/perf/util/trace-event.h b/tools/perf/util/trace-event.h
index 051fcf363825..420294a5773e 100644
--- a/tools/perf/util/trace-event.h
+++ b/tools/perf/util/trace-event.h
@@ -50,6 +50,7 @@ struct print_arg_atom {
struct print_arg_string {
char *string;
+ int offset;
};
struct print_arg_field {