git.ozlabs.org Git - ccan/blob - tools/ccanlint/tests/tests_coverage.c

   1 #include <tools/ccanlint/ccanlint.h>
   2 #include <tools/tools.h>
   3 #include <ccan/talloc/talloc.h>
   4 #include <ccan/str_talloc/str_talloc.h>
   5 #include <ccan/grab_file/grab_file.h>
   6 #include <ccan/str/str.h>
   7 #include <ccan/foreach/foreach.h>
   8 #include <sys/types.h>
   9 #include <sys/stat.h>
  10 #include <fcntl.h>
  11 #include <unistd.h>
  12 #include <limits.h>
  13 #include <errno.h>
  14 #include <stdlib.h>
  15 #include <stdio.h>
  16 #include <err.h>
  17 #include <string.h>
  18 #include <ctype.h>
  19
  20 static bool find_source_file(const struct manifest *m, const char *filename)
  21 {
  22         const struct ccan_file *i;
  23
  24         list_for_each(&m->c_files, i, list) {
  25                 if (streq(i->fullname, filename))
  26                         return true;
  27         }
  28         list_for_each(&m->h_files, i, list) {
  29                 if (streq(i->fullname, filename))
  30                         return true;
  31         }
  32         return false;
  33 }
  34
  35 /* 1 point for 50%, 2 points for 75%, 3 points for 87.5%...  Bonus for 100%. */
  36 static unsigned int score_coverage(float covered, unsigned total)
  37 {
  38         float thresh, uncovered = 1.0 - covered;
  39         unsigned int i;
  40
  41         if (covered == 1.0)
  42                 return total;
  43
  44         total--;
  45         for (i = 0, thresh = 0.5; i < total; i++, thresh /= 2) {
  46                 if (uncovered > thresh)
  47                         break;
  48         }
  49         return i;
  50 }
  51
  52
  53 /* FIXME: Don't know how stable this is.  Read cov files directly? */
  54 static void analyze_coverage(struct manifest *m, bool full_gcov,
  55                              const char *output, struct score *score)
  56 {
  57         char **lines = strsplit(score, output, "\n");
  58         float covered_lines = 0.0;
  59         unsigned int i, total_lines = 0;
  60         bool lines_matter = false;
  61
  62         /*
  63           Output looks like:
  64            File '../../../ccan/tdb2/private.h'
  65            Lines executed:0.00% of 8
  66            /home/ccan/ccan/tdb2/test/run-simple-delete.c:creating 'run-simple-delete.c.gcov'
  67
  68            File '../../../ccan/tdb2/tdb.c'
  69            Lines executed:0.00% of 450
  70         */
  71
  72         for (i = 0; lines[i]; i++) {
  73                 if (strstarts(lines[i], "File '")) {
  74                         char *file = lines[i] + strlen("File '");
  75                         file[strcspn(file, "'")] = '\0';
  76                         if (find_source_file(m, file))
  77                                 lines_matter = true;
  78                         else
  79                                 lines_matter = false;
  80                 } else if (lines_matter
  81                            && strstarts(lines[i], "Lines executed:")) {
  82                         float ex;
  83                         unsigned of;
  84                         if (sscanf(lines[i], "Lines executed:%f%% of %u",
  85                                    &ex, &of) != 2)
  86                                 errx(1, "Could not parse line '%s'", lines[i]);
  87                         total_lines += of;
  88                         covered_lines += ex / 100.0 * of;
  89                 } else if (full_gcov && strstr(lines[i], ":creating '")) {
  90                         char *file, *filename, *apostrophe;
  91                         apostrophe = strchr(lines[i], '\'');
  92                         filename = apostrophe + 1;
  93                         apostrophe = strchr(filename, '\'');
  94                         *apostrophe = '\0';
  95                         if (lines_matter) {
  96                                 file = grab_file(score, filename, NULL);
  97                                 if (!file) {
  98                                         score->error = talloc_asprintf(score,
  99                                                             "Reading %s",
 100                                                             filename);
 101                                         return;
 102                                 }
 103                                 printf("%s", file);
 104                         }
 105                         if (tools_verbose)
 106                                 printf("Unlinking %s", filename);
 107                         unlink(filename);
 108                 }
 109         }
 110
 111         score->pass = true;
 112
 113         if (verbose > 1)
 114                 printf("%u of %u lines covered\n",
 115                        (unsigned)covered_lines, total_lines);
 116
 117         /* Nothing covered?  We can't tell if there's a source file which
 118          * was never executed, or there really is no code to execute, so
 119          * assume the latter: this test deserves no score. */
 120         if (total_lines == 0)
 121                 score->total = score->score = 0;
 122         else {
 123                 score->total = 6;
 124                 score->score = score_coverage(covered_lines / total_lines,
 125                                               score->total);
 126         }
 127 }
 128
 129 static void do_run_coverage_tests(struct manifest *m,
 130                                   bool keep,
 131                                   unsigned int *timeleft, struct score *score)
 132 {
 133         struct ccan_file *i;
 134         char *cmdout, *outdir;
 135         char *covcmd;
 136         bool full_gcov = (verbose > 1);
 137         struct list_head *list;
 138
 139         /* This tells gcov where we put those .gcno files. */
 140         outdir = talloc_dirname(score, m->info_file->compiled);
 141         covcmd = talloc_asprintf(m, "gcov %s -o %s",
 142                                  full_gcov ? "" : "-n",
 143                                  outdir);
 144
 145         /* Unlink these files afterwards. */
 146         if (!keep) {
 147                 talloc_set_destructor(talloc_asprintf(score,
 148                                                       "%s/run.gcno", outdir),
 149                                       unlink_file_destructor);
 150                 talloc_set_destructor(talloc_asprintf(score,
 151                                                       "%s/run.gcda", outdir),
 152                                       unlink_file_destructor);
 153         }
 154
 155         /* Run them all. */
 156         foreach_ptr(list, &m->run_tests, &m->api_tests) {
 157                 list_for_each(list, i, list) {
 158                         if (run_command(score, timeleft, &cmdout,
 159                                         "%s", i->cov_compiled)) {
 160                                 covcmd = talloc_asprintf_append(covcmd, " %s",
 161                                                                 i->fullname);
 162                         } else {
 163                                 score_file_error(score, i, 0,
 164                                                  "Running test with coverage"
 165                                                  " failed: %s", cmdout);
 166                                 return;
 167                         }
 168                 }
 169         }
 170
 171         /* Now run gcov: we want output even if it succeeds. */
 172         if (!run_command(score, timeleft, &cmdout, "%s", covcmd)) {
 173                 score->error = talloc_asprintf(score, "Running gcov: %s",
 174                                                cmdout);
 175                 return;
 176         }
 177
 178         analyze_coverage(m, full_gcov, cmdout, score);
 179 }
 180
 181 struct ccanlint tests_coverage = {
 182         .key = "tests_coverage",
 183         .name = "Module's tests cover all the code",
 184         .check = do_run_coverage_tests,
 185         .needs = "tests_compile_coverage tests_pass"
 186 };
 187
 188 REGISTER_TEST(tests_coverage);