From 0ebf5bdf043a27fd3dfb7f92e0cb63d88954c44d Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Fri, 19 Apr 2024 03:47:29 +0200 Subject: Adding upstream version 115.8.0esr. Signed-off-by: Daniel Baumann --- .../tests/hr-time/resources/timing-attack.js | 42 ++++++++++++++++++++++ 1 file changed, 42 insertions(+) create mode 100644 testing/web-platform/tests/hr-time/resources/timing-attack.js (limited to 'testing/web-platform/tests/hr-time/resources/timing-attack.js') 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.'); +} -- cgit v1.2.3