perf disassemble: Move check for kallsyms + !kcore

We don't need to do all that filename logic to then just have to test
something unrelated and bail out, move it to the start of the function.

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: http://lkml.kernel.org/n/tip-lk1v4srtsktonnyp6t1o0uhx@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 4024d30..9882bc6 100644 (file)
--- a/tools/perf/util/annotate.c
+++ b/tools/perf/util/annotate.c
@@ -1165,11 +1165,10 @@ int symbol__strerror_disassemble(struct symbol *sym __maybe_unused, struct map *
 int symbol__disassemble(struct symbol *sym, struct map *map, size_t privsize)
 {
        struct dso *dso = map->dso;
-       char *filename = dso__build_id_filename(dso, NULL, 0);
+       char *filename;
        bool free_filename = true;
        char command[PATH_MAX * 2];
        FILE *file;
-       int err = 0;
        char symfs_filename[PATH_MAX];
        struct kcore_extract kce;
        bool delete_extract = false;
@@ -1177,7 +1176,13 @@ int symbol__disassemble(struct symbol *sym, struct map *map, size_t privsize)
        int lineno = 0;
        int nline;
        pid_t pid;
+       int err = SYMBOL_ANNOTATE_ERRNO__NO_VMLINUX;
+
+       if (dso->symtab_type == DSO_BINARY_TYPE__KALLSYMS &&
+           !dso__is_kcore(dso))
+               goto out;
 
+       filename = dso__build_id_filename(dso, NULL, 0);
        if (filename)
                symbol__join_symfs(symfs_filename, filename);
 
@@ -1201,12 +1206,6 @@ fallback:
                free_filename = false;
        }
 
-       if (dso->symtab_type == DSO_BINARY_TYPE__KALLSYMS &&
-           !dso__is_kcore(dso)) {
-               err = SYMBOL_ANNOTATE_ERRNO__NO_VMLINUX;
-               goto out_free_filename;
-       }
-
        pr_debug("%s: filename=%s, sym=%s, start=%#" PRIx64 ", end=%#" PRIx64 "\n", __func__,
                 filename, sym->name, map->unmap_ip(map, sym->start),
                 map->unmap_ip(map, sym->end));
@@ -1338,6 +1337,7 @@ out_free_filename:
                kcore_extract__delete(&kce);
        if (free_filename)
                free(filename);
+out:
        return err;
 
 out_close_stdout: