gecko-dev/tools/profiler/tests/test_asm.js

80 lines
2.1 KiB
JavaScript

// Check that asm.js code shows up on the stack.
function run_test() {
let p = Cc["@mozilla.org/tools/profiler;1"];
// Just skip the test if the profiler component isn't present.
if (!p)
return;
p = p.getService(Ci.nsIProfiler);
if (!p)
return;
// This test assumes that it's starting on an empty SPS stack.
// (Note that the other profiler tests also assume the profiler
// isn't already started.)
do_check_true(!p.IsActive());
let jsFuns = Cu.getJSTestingFunctions();
if (!jsFuns.isAsmJSCompilationAvailable())
return;
const ms = 10;
p.StartProfiler(10000, ms, ["js"], 1);
let stack = null;
function ffi_function(){
var delayMS = 5;
while (1) {
let then = Date.now();
do {} while (Date.now() - then < delayMS);
var thread0 = p.getProfileData().threads[0];
if (delayMS > 30000)
return;
delayMS *= 2;
if (thread0.samples.data.length == 0)
continue;
var lastSample = thread0.samples.data[thread0.samples.data.length - 1];
stack = String(getInflatedStackLocations(thread0, lastSample));
if (stack.indexOf("trampoline") !== -1)
return;
}
}
function asmjs_module(global, ffis) {
"use asm";
var ffi = ffis.ffi;
function asmjs_function() {
ffi();
}
return asmjs_function;
}
do_check_true(jsFuns.isAsmJSModule(asmjs_module));
var asmjs_function = asmjs_module(null, {ffi:ffi_function});
do_check_true(jsFuns.isAsmJSFunction(asmjs_function));
asmjs_function();
do_check_neq(stack, null);
var i1 = stack.indexOf("entry trampoline");
do_check_true(i1 !== -1);
var i2 = stack.indexOf("asmjs_function");
do_check_true(i2 !== -1);
var i3 = stack.indexOf("FFI trampoline");
do_check_true(i3 !== -1);
var i4 = stack.indexOf("ffi_function");
do_check_true(i4 !== -1);
do_check_true(i1 < i2);
do_check_true(i2 < i3);
do_check_true(i3 < i4);
p.StopProfiler();
}