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authorHe Kuang <hekuang@huawei.com>2015-05-11 09:25:02 +0000
committerArnaldo Carvalho de Melo <acme@redhat.com>2015-05-12 09:59:49 -0300
commitfb9596d1731cc37da6489de439f8b876f3a12db2 (patch)
tree56cab9e7550431c1c5a2ef24aeaa37f87da1d628 /tools/perf/util/probe-finder.c
parentff8f695c0ec9d73d8a9f92fe634d6476ad74e3a1 (diff)
perf probe: Remove length limitation for showing available variables
Use struct strbuf instead of bare char[] to remove the length limitation of variables in variable_list, so they will not disappear due to overlength, and make preparation for adding more description for variables. Signed-off-by: He Kuang <hekuang@huawei.com> Acked-by: Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Wang Nan <wangnan0@huawei.com> Link: http://lkml.kernel.org/r/1431336304-16863-1-git-send-email-hekuang@huawei.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Diffstat (limited to 'tools/perf/util/probe-finder.c')
-rw-r--r--tools/perf/util/probe-finder.c17
1 files changed, 10 insertions, 7 deletions
diff --git a/tools/perf/util/probe-finder.c b/tools/perf/util/probe-finder.c
index 8b9e274f940c..d7c2e90ab4ce 100644
--- a/tools/perf/util/probe-finder.c
+++ b/tools/perf/util/probe-finder.c
@@ -1255,14 +1255,11 @@ int debuginfo__find_trace_events(struct debuginfo *dbg,
return (ret < 0) ? ret : tf.ntevs;
}
-#define MAX_VAR_LEN 64
-
/* Collect available variables in this scope */
static int collect_variables_cb(Dwarf_Die *die_mem, void *data)
{
struct available_var_finder *af = data;
struct variable_list *vl;
- char buf[MAX_VAR_LEN];
int tag, ret;
vl = &af->vls[af->nvls - 1];
@@ -1274,10 +1271,16 @@ static int collect_variables_cb(Dwarf_Die *die_mem, void *data)
af->pf.fb_ops, &af->pf.sp_die,
NULL);
if (ret == 0) {
- ret = die_get_varname(die_mem, buf, MAX_VAR_LEN);
- pr_debug2("Add new var: %s\n", buf);
- if (ret > 0)
- strlist__add(vl->vars, buf);
+ struct strbuf buf;
+
+ strbuf_init(&buf, 64);
+ ret = die_get_varname(die_mem, &buf);
+ pr_debug2("Add new var: %s\n", buf.buf);
+ if (ret == 0) {
+ strlist__add(vl->vars,
+ strbuf_detach(&buf, NULL));
+ }
+ strbuf_release(&buf);
}
}