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-rw-r--r--tools/code-coverage/tests/xpcshell/head.js100
1 files changed, 100 insertions, 0 deletions
diff --git a/tools/code-coverage/tests/xpcshell/head.js b/tools/code-coverage/tests/xpcshell/head.js
new file mode 100644
index 0000000000..3642c5794c
--- /dev/null
+++ b/tools/code-coverage/tests/xpcshell/head.js
@@ -0,0 +1,100 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+var { AppConstants } = ChromeUtils.importESModule(
+ "resource://gre/modules/AppConstants.sys.mjs"
+);
+
+function getFiles() {
+ // This is the directory where gcov is emitting the gcda files.
+ const jsCoveragePath = Services.env.get("JS_CODE_COVERAGE_OUTPUT_DIR");
+
+ const jsCoverageDir = Cc["@mozilla.org/file/local;1"].createInstance(
+ Ci.nsIFile
+ );
+ jsCoverageDir.initWithPath(jsCoveragePath);
+
+ let files = [];
+
+ let entries = jsCoverageDir.directoryEntries;
+ while (entries.hasMoreElements()) {
+ files.push(entries.nextFile);
+ }
+
+ return files;
+}
+
+function diffFiles(files_after, files_before) {
+ let files_before_set = new Set(files_before.map(file => file.leafName));
+ return files_after.filter(file => !files_before_set.has(file.leafName));
+}
+
+const BASENAME_RE = new RegExp("([^/\\\\]+)$");
+
+function parseRecords(files) {
+ let records = new Map();
+
+ for (let file of files) {
+ const lines = Cu.readUTF8File(file).split("\n");
+ let currentSF = null;
+
+ for (let line of lines) {
+ let [recordType, ...recordContent] = line.split(":");
+ recordContent = recordContent.join(":");
+
+ switch (recordType) {
+ case "FNDA": {
+ if (currentSF == null) {
+ throw new Error("SF missing");
+ }
+
+ let [hits, name] = recordContent.split(",");
+ currentSF.push({
+ type: "FNDA",
+ hits,
+ name,
+ });
+ break;
+ }
+
+ case "FN": {
+ if (currentSF == null) {
+ throw new Error("SF missing");
+ }
+
+ let name = recordContent.split(",")[1];
+ currentSF.push({
+ type: "FN",
+ name,
+ });
+ break;
+ }
+
+ case "SF": {
+ if (
+ recordContent.startsWith("resource:") ||
+ recordContent.startsWith("chrome:")
+ ) {
+ recordContent = recordContent.split("/").at(-1);
+ } else {
+ if (AppConstants.platform == "win") {
+ recordContent = recordContent.replace(/\//g, "\\");
+ }
+ const match = BASENAME_RE.exec(recordContent);
+ if (match.length) {
+ recordContent = match[0];
+ }
+ }
+
+ currentSF = [];
+
+ records.set(recordContent, currentSF);
+ break;
+ }
+ }
+ }
+ }
+
+ return records;
+}