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// Tests wasm frame tracing. Only tests for direct and indirect call chains
// in wasm that lead to JS allocation. Does not test any timeout or interrupt
// related aspects. The structure is
//
// test top level: call fn2
// fn2: call fn1
// fn1: do 100k times { call-direct fn0; call-indirect fn0; }
// fn0: call out to JS that does allocation
//
// Eventually fn0 will trigger GC and we expect the chain of resulting frames
// to be traced correctly. fn2, fn1 and fn0 have some ref-typed args, so
// there will be traceable stack words to follow, in the sequence of frames.
const {Module,Instance} = WebAssembly;
let t =
`(module
(import "" "check3" (func $check3 (param externref) (param externref) (param externref)))
(import "" "alloc" (func $alloc (result externref)))
(type $typeOfFn0
(func (param i32) (param externref) (param i32)
(param externref) (param externref) (param i32) (result i32)))
(table 1 1 funcref)
(elem (i32.const 0) $fn0)
;; -- fn 0
(func $fn0 (export "fn0")
(param $arg1 i32) (param $arg2 externref) (param $arg3 i32)
(param $arg4 externref) (param $arg5 externref) (param $arg6 i32) (result i32)
(call $alloc)
drop
(i32.add (i32.add (local.get $arg1) (local.get $arg3)) (local.get $arg6))
;; Poke the ref-typed arguments, to be sure that they got kept alive
;; properly across any GC that the |alloc| call might have done.
(call $check3 (local.get $arg2) (local.get $arg4) (local.get $arg5))
)
;; -- fn 1
(func $fn1 (export "fn1") (param $arg1 externref) (result i32)
(local $i i32)
(loop (result i32)
;; call direct 0
(call $fn0 (i32.const 10) (local.get $arg1) (i32.const 12)
(local.get $arg1) (local.get $arg1) (i32.const 15))
;; call indirect 0
(call_indirect (type $typeOfFn0)
(i32.const 10) (local.get $arg1) (i32.const 12)
(local.get $arg1) (local.get $arg1) (i32.const 15)
(i32.const 0)) ;; table index
i32.add
;; Do 60k iterations of this loop, to get a good amount of allocation
(local.set $i (i32.add (local.get $i) (i32.const 1)))
(br_if 0 (i32.lt_s (local.get $i) (i32.const 60000)))
)
)
;; -- fn 2
(func $fn2 (export "fn2") (param $arg1 externref) (result i32)
(call $fn1 (local.get $arg1))
)
)`;
function Croissant(chocolate, number) {
this.chocolate = chocolate;
this.number = number;
}
function allocates() {
return new Croissant(true, 271828);
}
function check3(a1, a2, a3) {
assertEq(a1.number, 31415927);
assertEq(a2.number, 31415927);
assertEq(a3.number, 31415927);
}
let i = wasmEvalText(t, {"":{alloc: allocates, check3: check3}});
print(i.exports.fn2( new Croissant(false, 31415927) ));