+#include <tools/ccanlint/ccanlint.h>
+#include <tools/tools.h>
+#include <ccan/talloc/talloc.h>
+#include <ccan/str_talloc/str_talloc.h>
+#include <ccan/str/str.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <fcntl.h>
+#include <unistd.h>
+#include <limits.h>
+#include <errno.h>
+#include <stdlib.h>
+#include <stdio.h>
+#include <err.h>
+#include <string.h>
+#include <ctype.h>
+#include "build-coverage.h"
+
+struct coverage_result {
+ float uncovered;
+ const char *what;
+ const char *output;
+};
+
+static bool find_source_file(struct manifest *m, const char *filename)
+{
+ struct ccan_file *i;
+
+ list_for_each(&m->c_files, i, list) {
+ if (streq(i->fullname, filename))
+ return true;
+ }
+ list_for_each(&m->h_files, i, list) {
+ if (streq(i->fullname, filename))
+ return true;
+ }
+ return false;
+}
+
+/* FIXME: Don't know how stable this is. Read cov files directly? */
+static void analyze_coverage(struct manifest *m,
+ struct coverage_result *res, const char *output)
+{
+ char **lines = strsplit(res, output, "\n", NULL);
+ float covered_lines = 0.0;
+ unsigned int i, total_lines = 0;
+ bool lines_matter = false;
+
+ /* FIXME: We assume GCOV mentions all files!
+ Output looks like:
+ File '../../../ccan/tdb2/private.h'
+ Lines executed:0.00% of 8
+
+ File '../../../ccan/tdb2/tdb.c'
+ Lines executed:0.00% of 450
+ */
+
+ for (i = 0; lines[i]; i++) {
+ if (strstarts(lines[i], "File '")) {
+ char *file = lines[i] + strlen("File '");
+ file[strcspn(file, "'")] = '\0';
+ if (find_source_file(m, file))
+ lines_matter = true;
+ else
+ lines_matter = false;
+ } else if (lines_matter
+ && strstarts(lines[i], "Lines executed:")) {
+ float ex;
+ unsigned of;
+ if (sscanf(lines[i], "Lines executed:%f%% of %u",
+ &ex, &of) != 2)
+ errx(1, "Could not parse line '%s'", lines[i]);
+ total_lines += of;
+ covered_lines += ex / 100.0 * of;
+ }
+ }
+
+ /* Nothing covered? */
+ if (total_lines == 0)
+ res->uncovered = 1.0;
+ else
+ res->uncovered = 1.0 - covered_lines / total_lines;
+}
+
+static void *do_run_coverage_tests(struct manifest *m,
+ bool keep,
+ unsigned int *timeleft)
+{
+ struct coverage_result *res;
+ struct ccan_file *i;
+ char *cmdout;
+ char *olddir;
+ char *covcmd;
+ bool ok;
+
+ /* We run tests in the module directory, so any paths
+ * referenced can all be module-local. */
+ olddir = talloc_getcwd(m);
+ if (!olddir)
+ err(1, "Could not save cwd");
+ if (chdir(m->dir) != 0)
+ err(1, "Could not chdir to %s", m->dir);
+
+ res = talloc(m, struct coverage_result);
+ res->what = NULL;
+ res->uncovered = 1.0;
+
+ /* This tells gcov where we put those .gcno files. */
+ covcmd = talloc_asprintf(m, "gcov -n -o %s",
+ talloc_dirname(res, m->info_file->compiled));
+
+ /* Run them all. */
+ list_for_each(&m->run_tests, i, list) {
+ cmdout = run_command(m, timeleft, i->cov_compiled);
+ if (cmdout) {
+ res->what = i->fullname;
+ res->output = talloc_steal(res, cmdout);
+ return res;
+ }
+ covcmd = talloc_asprintf_append(covcmd, " %s", i->name);
+ move_gcov_turd(olddir, i, ".gcda");
+ }
+
+ list_for_each(&m->api_tests, i, list) {
+ cmdout = run_command(m, timeleft, i->cov_compiled);
+ if (cmdout) {
+ res->what = i->fullname;
+ res->output = talloc_steal(res, cmdout);
+ return res;
+ }
+ covcmd = talloc_asprintf_append(covcmd, " %s", i->name);
+ move_gcov_turd(olddir, i, ".gcda");
+ }
+
+ /* Now run gcov: we want output even if it succeeds. */
+ cmdout = run_with_timeout(m, covcmd, &ok, timeleft);
+ if (!ok) {
+ res->what = "Running gcov";
+ res->output = talloc_steal(res, cmdout);
+ return res;
+ }
+
+ analyze_coverage(m, res, cmdout);
+ return res;
+}
+
+/* 1 point for 50%, 2 points for 75%, 3 points for 87.5%... */
+static unsigned int score_coverage(struct manifest *m, void *check_result)
+{
+ struct coverage_result *res = check_result;
+ float thresh;
+ unsigned int i;
+
+ for (i = 0, thresh = 0.5;
+ i < run_coverage_tests.total_score;
+ i++, thresh /= 2) {
+ if (res->uncovered > thresh)
+ break;
+ }
+ return i;
+}
+
+static const char *describe_run_coverage_tests(struct manifest *m,
+ void *check_result)
+{
+ struct coverage_result *res = check_result;
+
+ if (res->what)
+ return talloc_asprintf(m, "%s: %s", res->what, res->output);
+
+ return talloc_asprintf(m, "Tests achieved %0.2f%% coverage",
+ (1.0 - res->uncovered) * 100);
+}
+
+struct ccanlint run_coverage_tests = {
+ .key = "test-coverage",
+ .name = "Code coverage of module tests",
+ .total_score = 5,
+ .score = score_coverage,
+ .check = do_run_coverage_tests,
+ .describe = describe_run_coverage_tests,
+};
+
+REGISTER_TEST(run_coverage_tests, &compile_coverage_tests, NULL);