v8/test/mjsunit/regress/regress-opt-after-debug-deopt.js

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// Copyright 2013 the V8 project authors. All rights reserved.
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are
// met:
//
// * Redistributions of source code must retain the above copyright
// notice, this list of conditions and the following disclaimer.
// * Redistributions in binary form must reproduce the above
// copyright notice, this list of conditions and the following
// disclaimer in the documentation and/or other materials provided
// with the distribution.
// * Neither the name of Google Inc. nor the names of its
// contributors may be used to endorse or promote products derived
// from this software without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
// Flags: --expose-debug-as debug --allow-natives-syntax
// Flags: --concurrent-recompilation --concurrent-recompilation-delay=100
if (!%IsConcurrentRecompilationSupported()) {
print("Concurrent recompilation is disabled. Skipping this test.");
quit();
}
Debug = debug.Debug;
function listener(event, exec_state, event_data, data) {
if (event != Debug.DebugEvent.Break) return;
try {
assertEquals("foo", exec_state.frame(0).evaluate("a").value());
} catch (e) {
exception = e;
};
listened++;
};
var exception = null;
var listened = 0;
var f = function() {
var a = "foo";
var b = a.substring("1");
[a, b].sort();
return a;
}
f();
f();
%OptimizeFunctionOnNextCall(f, "concurrent"); // Mark with builtin.
f(); // Kick off concurrent recompilation.
Debug.setListener(listener); // Activate debugger.
Debug.setBreakPoint(f, 2, 0); // Force deopt.
// Sync with optimization thread. But no optimized code is installed.
assertUnoptimized(f, "sync");
f(); // Trigger break point.
assertEquals(1, listened);
assertNull(exception);