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const { startProfiling, endProfiling, assertEqPreciseStacks, isSingleStepProfilingEnabled } = WasmHelpers;
// Dummy constructor.
function Baguette(calories) {
this.calories = calories;
}
// Ensure the baseline compiler sync's before the postbarrier.
(function() {
wasmEvalText(`(module
(global (mut externref) (ref.null extern))
(func (export "f")
global.get 0
ref.null extern
global.set 0
global.set 0
)
)`).exports.f();
})();
let exportsPlain = wasmEvalText(`(module
(global i32 (i32.const 42))
(global $g (mut externref) (ref.null extern))
(func (export "set") (param externref) local.get 0 global.set $g)
(func (export "get") (result externref) global.get $g)
)`).exports;
let exportsObj = wasmEvalText(`(module
(global $g (export "g") (mut externref) (ref.null extern))
(func (export "set") (param externref) local.get 0 global.set $g)
(func (export "get") (result externref) global.get $g)
)`).exports;
// 7 => Generational GC zeal.
gczeal(7, 1);
for (var i = 0; i < 100; i++) {
new Baguette(i);
}
function test(exports) {
// Test post-write barrier in wasm code.
{
let nomnom = new Baguette(15);
exports.set(nomnom);
nomnom = null;
}
new Baguette();
assertEq(exports.get().calories, 15);
}
test(exportsPlain);
test(exportsObj);
// Test stacks reported in profiling mode in a separate way, to not perturb
// the behavior of the tested functions.
if (!isSingleStepProfilingEnabled)
quit(0);
enableGeckoProfiling();
const EXPECTED_STACKS = [
// Expected output for (simulator+baseline).
['', '!>', '0,!>', '<,0,!>', 'GC postbarrier,0,!>',
'<,0,!>', '0,!>', '!>', ''],
// Expected output for (simulator+via-Ion).
['', '!>', '0,!>', '<,0,!>', 'filtering GC postbarrier,0,!>',
'<,0,!>', '0,!>', '!>', ''],
// Expected output for other configurations.
['', '!>', '0,!>', '!>', ''],
];
function testStacks(exports) {
// Test post-write barrier in wasm code.
{
let nomnom = new Baguette(15);
startProfiling();
exports.set(nomnom);
assertEqPreciseStacks(endProfiling(), EXPECTED_STACKS);
nomnom = null;
}
new Baguette();
assertEq(exports.get().calories, 15);
}
testStacks(exportsPlain);
testStacks(exportsObj);