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Test Info:
// Check that asm.js code shows up on the stack.
add_task(async () => {
// This test assumes that it's starting on an empty profiler stack.
// (Note that the other profiler tests also assume the profiler
// isn't already started.)
Assert.ok(!Services.profiler.IsActive());
let jsFuns = Cu.getJSTestingFunctions();
if (!jsFuns.isAsmJSCompilationAvailable()) {
return;
}
const ms = 10;
await Services.profiler.StartProfiler(10000, ms, ["js"]);
let stack = null;
function ffi_function() {
var delayMS = 5;
while (1) {
let then = Date.now();
do {
// do nothing
} while (Date.now() - then < delayMS);
var thread0 = Services.profiler.getProfileData().threads[0];
if (delayMS > 30000) {
return;
}
delayMS *= 2;
if (!thread0.samples.data.length) {
continue;
}
var lastSample = thread0.samples.data[thread0.samples.data.length - 1];
stack = String(getInflatedStackLocations(thread0, lastSample));
if (stack.includes("trampoline")) {
return;
}
}
}
function asmjs_module(global, ffis) {
"use asm";
var ffi = ffis.ffi;
function asmjs_function() {
ffi();
}
return asmjs_function;
}
Assert.ok(jsFuns.isAsmJSModule(asmjs_module));
var asmjs_function = asmjs_module(null, { ffi: ffi_function });
Assert.ok(jsFuns.isAsmJSFunction(asmjs_function));
asmjs_function();
Assert.notEqual(stack, null);
var i1 = stack.indexOf("entry trampoline");
Assert.ok(i1 !== -1);
var i2 = stack.indexOf("asmjs_function");
Assert.ok(i2 !== -1);
var i3 = stack.indexOf("exit trampoline");
Assert.ok(i3 !== -1);
var i4 = stack.indexOf("ffi_function");
Assert.ok(i4 !== -1);
Assert.ok(i1 < i2);
Assert.ok(i2 < i3);
Assert.ok(i3 < i4);
await Services.profiler.StopProfiler();
});