60 lines
1.9 KiB
JavaScript
60 lines
1.9 KiB
JavaScript
// Check that the EnterJIT frame, added by the JIT trampoline and
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// usable by a native unwinder to resume unwinding after encountering
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// JIT code, is pushed as expected.
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function run_test() {
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let p = Cc["@mozilla.org/tools/profiler;1"];
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// Just skip the test if the profiler component isn't present.
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if (!p)
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return;
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p = p.getService(Ci.nsIProfiler);
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if (!p)
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return;
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// This test assumes that it's starting on an empty SPS stack.
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// (Note that the other profiler tests also assume the profiler
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// isn't already started.)
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do_check_true(!p.IsActive());
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const ms = 5;
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p.StartProfiler(100, ms, ["js"], 1);
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function arbitrary_name(){
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// A frame for |arbitrary_name| has been pushed. Do a sequence of
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// increasingly long spins until we get a sample.
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var delayMS = 5;
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while (1) {
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do_print("loop: ms = " + delayMS);
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let then = Date.now();
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do {
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let n = 10000;
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while (--n); // OSR happens here
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// Spin in the hope of getting a sample.
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} while (Date.now() - then < delayMS);
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let pr = p.getProfileData().threads[0];
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if (pr.samples.data.length > 0 || delayMS > 30000)
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return pr;
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delayMS *= 2;
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}
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};
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var profile = arbitrary_name();
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do_check_neq(profile.samples.data.length, 0);
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var lastSample = profile.samples.data[profile.samples.data.length - 1];
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var stack = getInflatedStackLocations(profile, lastSample);
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do_print(stack);
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// All we can really check here is ensure that there is exactly
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// one arbitrary_name frame in the list.
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var gotName = false;
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for (var i = 0; i < stack.length; i++) {
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if (stack[i].match(/arbitrary_name/)) {
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do_check_eq(gotName, false);
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gotName = true;
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}
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}
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do_check_eq(gotName, true);
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p.StopProfiler();
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}
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