perf buildid-list: New plumbing command
[linux-2.6.git] / tools / perf / builtin-buildid-list.c
1 /*
2  * builtin-buildid-list.c
3  *
4  * Builtin buildid-list command: list buildids in perf.data
5  *
6  * Copyright (C) 2009, Red Hat Inc.
7  * Copyright (C) 2009, Arnaldo Carvalho de Melo <acme@redhat.com>
8  */
9 #include "builtin.h"
10 #include "perf.h"
11 #include "util/cache.h"
12 #include "util/data_map.h"
13 #include "util/debug.h"
14 #include "util/header.h"
15 #include "util/parse-options.h"
16 #include "util/symbol.h"
17
18 static char const *input_name = "perf.data";
19 static int force;
20
21 static const char *const buildid_list_usage[] = {
22         "perf report [<options>]",
23         NULL
24 };
25
26 static const struct option options[] = {
27         OPT_STRING('i', "input", &input_name, "file",
28                     "input file name"),
29         OPT_BOOLEAN('f', "force", &force, "don't complain, do it"),
30         OPT_BOOLEAN('v', "verbose", &verbose,
31                     "be more verbose (show counter open errors, etc)"),
32         OPT_END()
33 };
34
35 static int perf_file_section__process_buildids(struct perf_file_section *self,
36                                                int feat, int fd)
37 {
38         if (feat != HEADER_BUILD_ID)
39                 return 0;
40
41         if (lseek(fd, self->offset, SEEK_SET) < 0) {
42                 pr_warning("Failed to lseek to %Ld offset for buildids!\n",
43                            self->offset);
44                 return -1;
45         }
46
47         if (perf_header__read_build_ids(fd, self->offset, self->size)) {
48                 pr_warning("Failed to read buildids!\n");
49                 return -1;
50         }
51
52         return 0;
53 }
54
55 static int __cmd_buildid_list(void)
56 {
57         int err = -1;
58         struct perf_header *header;
59         struct perf_file_header f_header;
60         struct stat input_stat;
61         int input = open(input_name, O_RDONLY);
62
63         if (input < 0) {
64                 pr_err("failed to open file: %s", input_name);
65                 if (!strcmp(input_name, "perf.data"))
66                         pr_err("  (try 'perf record' first)");
67                 pr_err("\n");
68                 goto out;
69         }
70
71         err = fstat(input, &input_stat);
72         if (err < 0) {
73                 perror("failed to stat file");
74                 goto out_close;
75         }
76
77         if (!force && input_stat.st_uid && (input_stat.st_uid != geteuid())) {
78                 pr_err("file %s not owned by current user or root\n",
79                        input_name);
80                 goto out_close;
81         }
82
83         if (!input_stat.st_size) {
84                 pr_info("zero-sized file, nothing to do!\n");
85                 goto out_close;
86         }
87
88         err = -1;
89         header = perf_header__new();
90         if (header == NULL)
91                 goto out_close;
92
93         if (perf_file_header__read(&f_header, header, input) < 0) {
94                 pr_warning("incompatible file format");
95                 goto out_close;
96         }
97
98         err = perf_header__process_sections(header, input,
99                                          perf_file_section__process_buildids);
100
101         if (err < 0)
102                 goto out_close;
103
104         dsos__fprintf_buildid(stdout);
105 out_close:
106         close(input);
107 out:
108         return err;
109 }
110
111 int cmd_buildid_list(int argc, const char **argv, const char *prefix __used)
112 {
113         argc = parse_options(argc, argv, options, buildid_list_usage, 0);
114         setup_pager();
115         return __cmd_buildid_list();
116 }