1 /*
2  * builtin-buildid-cache.c
3  *
4  * Builtin buildid-cache command: Manages build-id cache
5  *
6  * Copyright (C) 2010, Red Hat Inc.
7  * Copyright (C) 2010, Arnaldo Carvalho de Melo <acme@redhat.com>
8  */
9 #include "builtin.h"
10 #include "perf.h"
11 #include "util/cache.h"
12 #include "util/debug.h"
13 #include "util/header.h"
14 #include "util/parse-options.h"
15 #include "util/strlist.h"
16 #include "util/symbol.h"
17 
18 static char const *add_name_list_str, *remove_name_list_str;
19 
20 static const char * const buildid_cache_usage[] = {
21 	"perf buildid-cache [<options>]",
22 	NULL
23 };
24 
25 static const struct option buildid_cache_options[] = {
26 	OPT_STRING('a', "add", &add_name_list_str,
27 		   "file list", "file(s) to add"),
28 	OPT_STRING('r', "remove", &remove_name_list_str, "file list",
29 		    "file(s) to remove"),
30 	OPT_INCR('v', "verbose", &verbose, "be more verbose"),
31 	OPT_END()
32 };
33 
34 static int build_id_cache__add_file(const char *filename, const char *debugdir)
35 {
36 	char sbuild_id[BUILD_ID_SIZE * 2 + 1];
37 	u8 build_id[BUILD_ID_SIZE];
38 	int err;
39 
40 	if (filename__read_build_id(filename, &build_id, sizeof(build_id)) < 0) {
41 		pr_debug("Couldn't read a build-id in %s\n", filename);
42 		return -1;
43 	}
44 
45 	build_id__sprintf(build_id, sizeof(build_id), sbuild_id);
46 	err = build_id_cache__add_s(sbuild_id, debugdir, filename,
47 				    false, false);
48 	if (verbose)
49 		pr_info("Adding %s %s: %s\n", sbuild_id, filename,
50 			err ? "FAIL" : "Ok");
51 	return err;
52 }
53 
54 static int build_id_cache__remove_file(const char *filename __maybe_unused,
55 				       const char *debugdir __maybe_unused)
56 {
57 	u8 build_id[BUILD_ID_SIZE];
58 	char sbuild_id[BUILD_ID_SIZE * 2 + 1];
59 
60 	int err;
61 
62 	if (filename__read_build_id(filename, &build_id, sizeof(build_id)) < 0) {
63 		pr_debug("Couldn't read a build-id in %s\n", filename);
64 		return -1;
65 	}
66 
67 	build_id__sprintf(build_id, sizeof(build_id), sbuild_id);
68 	err = build_id_cache__remove_s(sbuild_id, debugdir);
69 	if (verbose)
70 		pr_info("Removing %s %s: %s\n", sbuild_id, filename,
71 			err ? "FAIL" : "Ok");
72 
73 	return err;
74 }
75 
76 static int __cmd_buildid_cache(void)
77 {
78 	struct strlist *list;
79 	struct str_node *pos;
80 	char debugdir[PATH_MAX];
81 
82 	snprintf(debugdir, sizeof(debugdir), "%s", buildid_dir);
83 
84 	if (add_name_list_str) {
85 		list = strlist__new(true, add_name_list_str);
86 		if (list) {
87 			strlist__for_each(pos, list)
88 				if (build_id_cache__add_file(pos->s, debugdir)) {
89 					if (errno == EEXIST) {
90 						pr_debug("%s already in the cache\n",
91 							 pos->s);
92 						continue;
93 					}
94 					pr_warning("Couldn't add %s: %s\n",
95 						   pos->s, strerror(errno));
96 				}
97 
98 			strlist__delete(list);
99 		}
100 	}
101 
102 	if (remove_name_list_str) {
103 		list = strlist__new(true, remove_name_list_str);
104 		if (list) {
105 			strlist__for_each(pos, list)
106 				if (build_id_cache__remove_file(pos->s, debugdir)) {
107 					if (errno == ENOENT) {
108 						pr_debug("%s wasn't in the cache\n",
109 							 pos->s);
110 						continue;
111 					}
112 					pr_warning("Couldn't remove %s: %s\n",
113 						   pos->s, strerror(errno));
114 				}
115 
116 			strlist__delete(list);
117 		}
118 	}
119 
120 	return 0;
121 }
122 
123 int cmd_buildid_cache(int argc, const char **argv,
124 		      const char *prefix __maybe_unused)
125 {
126 	argc = parse_options(argc, argv, buildid_cache_options,
127 			     buildid_cache_usage, 0);
128 
129 	if (symbol__init() < 0)
130 		return -1;
131 
132 	setup_pager();
133 	return __cmd_buildid_cache();
134 }
135