summaryrefslogtreecommitdiffstats
path: root/testing/web-platform/tests/hr-time/resources/timing-attack.js
diff options
context:
space:
mode:
authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-19 01:47:29 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-19 01:47:29 +0000
commit0ebf5bdf043a27fd3dfb7f92e0cb63d88954c44d (patch)
treea31f07c9bcca9d56ce61e9a1ffd30ef350d513aa /testing/web-platform/tests/hr-time/resources/timing-attack.js
parentInitial commit. (diff)
downloadfirefox-esr-0ebf5bdf043a27fd3dfb7f92e0cb63d88954c44d.tar.xz
firefox-esr-0ebf5bdf043a27fd3dfb7f92e0cb63d88954c44d.zip
Adding upstream version 115.8.0esr.upstream/115.8.0esr
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'testing/web-platform/tests/hr-time/resources/timing-attack.js')
-rw-r--r--testing/web-platform/tests/hr-time/resources/timing-attack.js42
1 files changed, 42 insertions, 0 deletions
diff --git a/testing/web-platform/tests/hr-time/resources/timing-attack.js b/testing/web-platform/tests/hr-time/resources/timing-attack.js
new file mode 100644
index 0000000000..f1fc786903
--- /dev/null
+++ b/testing/web-platform/tests/hr-time/resources/timing-attack.js
@@ -0,0 +1,42 @@
+function run_test(isolated) {
+ let resolution = 100;
+ if (isolated) {
+ resolution = 5;
+ }
+ test(function() {
+ function check_resolutions(times, length) {
+ const end = length - 2;
+
+ // we compare each value with the following ones
+ for (let i = 0; i < end; i++) {
+ const h1 = times[i];
+ for (let j = i+1; j < end; j++) {
+ const h2 = times[j];
+ const diff = h2 - h1;
+ assert_true((diff === 0) || ((diff * 1000) >= resolution),
+ "Differences smaller than ' + resolution + ' microseconds: " + diff);
+ }
+ }
+ return true;
+ }
+
+ const times = new Array(10);
+ let index = 0;
+ let hrt1, hrt2, hrt;
+ assert_equals(self.crossOriginIsolated, isolated, "Document cross-origin isolated value matches");
+
+ // rapid firing of performance.now
+ hrt1 = performance.now();
+ hrt2 = performance.now();
+ times[index++] = hrt1;
+ times[index++] = hrt2;
+
+ // ensure that we get performance.now() to return a different value
+ do {
+ hrt = performance.now();
+ times[index++] = hrt;
+ } while ((hrt - hrt1) === 0);
+
+ assert_true(check_resolutions(times, index), 'Difference should be at least ' + resolution + ' microseconds.');
+ }, 'The recommended minimum resolution of the Performance interface has been set to ' + resolution + ' microseconds for cross-origin isolated contexts.');
+}