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 }