profiler-cont-base-frame-singlestep.js

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// |jit-test| skip-if: !wasmStackSwitchingEnabled() || !WasmHelpers.isSingleStepProfilingEnabled

// Same scenario as profiler-cont-base-frame.js, but the profiler stack is walked

// by single-step profiling rather than an explicit readGeckoProfilingStack() in

// the interrupt handler. The timeout is still required: it makes the activation

// exit wasm so JitActivation::wasmExitFP is set to the continuation entry frame,

// which is the case ProfilingFrameIterator::initFromExitFP has to handle without

// hitting MOZ_CRASH("Unexpected CodeRange kind").

enableGeckoProfiling();

enableSingleStepProfiling();

let interrupted = false;

setInterruptCallback(function () {

  interrupted = true;

  return true;

});

let ins = wasmEvalText(`(module

  (type $ft (func))

  (type $ct (cont $ft))

  (func $f (type $ft)

    (local $i i32)

    (loop $l

      (local.set $i (i32.add (local.get $i) (i32.const 1)))

      (br_if $l (i32.lt_u (local.get $i) (i32.const 20000)))))

  (elem declare func $f)

  (func (export "run") ref.func $f cont.new $ct resume $ct)

)`, {});

// Keep resuming the continuation until the interrupt handler has run while its

// entry function was the innermost wasm frame.

timeout(0.1);

while (!interrupted) {

  ins.exports.run();

disableSingleStepProfiling();