perf annotate: Introduce constructor/destructor for annotated_source

More stuff will go in there, all the parts that are not needed when a
symbol had no samples and that were mistakenly added to 'struct
annotation'.

Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Wang Nan <wangnan0@huawei.com>
Link: https://lkml.kernel.org/n/tip-u4761kyzhixw9ydk6kib3f0o@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

diff --git a/tools/perf/util/annotate.c b/tools/perf/util/annotate.c
index f0c6941bca6c8d2efaa4313a26ef7f4836374bd9..f6c9bb29ac848d0fa572fe16e3160356d011c070 100644 (file)
--- a/tools/perf/util/annotate.c
+++ b/tools/perf/util/annotate.c
@@ -678,6 +678,25 @@ static struct arch *arch__find(const char *name)
        return bsearch(name, architectures, nmemb, sizeof(struct arch), arch__key_cmp);
 }
 
+static struct annotated_source *annotated_source__new(void)
+{
+       struct annotated_source *src = zalloc(sizeof(*src));
+
+       if (src != NULL)
+               INIT_LIST_HEAD(&src->source);
+
+       return src;
+}
+
+static void annotated_source__delete(struct annotated_source *src)
+{
+       if (src == NULL)
+               return;
+       zfree(&src->histograms);
+       zfree(&src->cycles_hist);
+       free(src);
+}
+
 int symbol__alloc_hist(struct symbol *sym)
 {
        struct annotation *notes = symbol__annotation(sym);
@@ -704,17 +723,17 @@ int symbol__alloc_hist(struct symbol *sym)
        if (sizeof_sym_hist > SIZE_MAX / symbol_conf.nr_events)
                return -1;
 
-       notes->src = zalloc(sizeof(*notes->src));
+       notes->src = annotated_source__new();
        if (notes->src == NULL)
                return -1;
        notes->src->histograms = calloc(symbol_conf.nr_events, sizeof_sym_hist);
        if (notes->src->histograms == NULL) {
-               zfree(&notes->src);
+               annotated_source__delete(notes->src);
+               notes->src = NULL;
                return -1;
        }
        notes->src->sizeof_sym_hist = sizeof_sym_hist;
        notes->src->nr_histograms   = symbol_conf.nr_events;
-       INIT_LIST_HEAD(&notes->src->source);
        return 0;
 }