diff options
| author | Masami Hiramatsu <mhiramat@redhat.com> | 2010-05-19 15:57:49 -0400 |
|---|---|---|
| committer | Arnaldo Carvalho de Melo <acme@redhat.com> | 2010-07-05 18:51:33 -0300 |
| commit | b7dcb857cc3eb89136111fefe89780129c1af1d7 (patch) | |
| tree | 21350796c508db4fb782f3e61eb63f62c3527f69 /tools/perf/util/probe-event.c | |
| parent | b2a3c12b7442247c440f7083d48ef05716753ec1 (diff) | |
perf probe: Support static and global variables
Add static and global variables support to perf probe.
This allows user to trace non-local variables (and
structure members) at probe points.
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
LKML-Reference: <20100519195749.2885.17451.stgit@localhost6.localdomain6>
Signed-off-by: Masami Hiramatsu <mhiramat@redhat.com>
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Diffstat (limited to 'tools/perf/util/probe-event.c')
| -rw-r--r-- | tools/perf/util/probe-event.c | 15 |
1 files changed, 12 insertions, 3 deletions
diff --git a/tools/perf/util/probe-event.c b/tools/perf/util/probe-event.c index 351baa9a369..09cf5465e10 100644 --- a/tools/perf/util/probe-event.c +++ b/tools/perf/util/probe-event.c @@ -926,6 +926,7 @@ out: static int synthesize_kprobe_trace_arg(struct kprobe_trace_arg *arg, char *buf, size_t buflen) { + struct kprobe_trace_arg_ref *ref = arg->ref; int ret, depth = 0; char *tmp = buf; @@ -939,16 +940,24 @@ static int synthesize_kprobe_trace_arg(struct kprobe_trace_arg *arg, buf += ret; buflen -= ret; + /* Special case: @XXX */ + if (arg->value[0] == '@' && arg->ref) + ref = ref->next; + /* Dereferencing arguments */ - if (arg->ref) { - depth = __synthesize_kprobe_trace_arg_ref(arg->ref, &buf, + if (ref) { + depth = __synthesize_kprobe_trace_arg_ref(ref, &buf, &buflen, 1); if (depth < 0) return depth; } /* Print argument value */ - ret = e_snprintf(buf, buflen, "%s", arg->value); + if (arg->value[0] == '@' && arg->ref) + ret = e_snprintf(buf, buflen, "%s%+ld", arg->value, + arg->ref->offset); + else + ret = e_snprintf(buf, buflen, "%s", arg->value); if (ret < 0) return ret; buf += ret; |