v8/test/mjsunit/regress/regress-1118.js

// Copyright 2011 the V8 project authors. All rights reserved.
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//
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// Flags: --allow-natives-syntax

// An exception thrown in a function optimized by on-stack replacement (OSR)
// should be able to construct a receiver from all optimized stack frames.

function A() { }
A.prototype.f = function() { }

function B() { }

var o = new A();

// This function throws if o does not have an f property, and should not be
// inlined.
function g() { try { return o.f(); } finally { }}

// Optimization status (see runtime.cc):
// 1 - yes, 2 - no, 3 - always, 4 - never.

// This function should be optimized via OSR.
function h() {
  var optstatus = %GetOptimizationStatus(h);
  if (optstatus == 4) {
    // Optimizations are globally disabled; just run once.
    g();
  } else {
    // Run for a bit as long as h is unoptimized.
    while (%GetOptimizationStatus(h) == 2) {
      for (var j = 0; j < 100; j++) g();
    }
    g();
  }
}

h();
o = new B();
assertThrows("h()");