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      1 // Copyright 2013 the V8 project authors. All rights reserved.
      2 // Redistribution and use in source and binary forms, with or without
      3 // modification, are permitted provided that the following conditions are
      4 // met:
      5 //
      6 //     * Redistributions of source code must retain the above copyright
      7 //       notice, this list of conditions and the following disclaimer.
      8 //     * Redistributions in binary form must reproduce the above
      9 //       copyright notice, this list of conditions and the following
     10 //       disclaimer in the documentation and/or other materials provided
     11 //       with the distribution.
     12 //     * Neither the name of Google Inc. nor the names of its
     13 //       contributors may be used to endorse or promote products derived
     14 //       from this software without specific prior written permission.
     15 //
     16 // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
     17 // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
     18 // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
     19 // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
     20 // OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
     21 // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
     22 // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
     23 // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
     24 // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
     25 // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
     26 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     27 
     28 // Flags: --expose-debug-as debug --allow-natives-syntax
     29 // Flags: --concurrent-recompilation --block-concurrent-recompilation
     30 
     31 if (!%IsConcurrentRecompilationSupported()) {
     32   print("Concurrent recompilation is disabled. Skipping this test.");
     33   quit();
     34 }
     35 
     36 Debug = debug.Debug;
     37 
     38 function listener(event, exec_state, event_data, data) {
     39   if (event != Debug.DebugEvent.Break) return;
     40   try {
     41     assertEquals("foo", exec_state.frame(0).evaluate("a").value());
     42   } catch (e) {
     43     exception = e;
     44   };
     45   listened++;
     46 };
     47 
     48 var exception = null;
     49 var listened = 0;
     50 
     51 var f = function() {
     52   var a = "foo";
     53   var b = a.substring("1");
     54   [a, b].sort();
     55   return a;
     56 }
     57 
     58 f();
     59 f();
     60 %OptimizeFunctionOnNextCall(f, "concurrent");  // Mark with builtin.
     61 f();                           // Kick off concurrent recompilation.
     62 
     63 // After compile graph has been created...
     64 Debug.setListener(listener);   // Activate debugger.
     65 Debug.setBreakPoint(f, 2, 0);  // Force deopt.
     66 
     67 // At this point, concurrent recompilation is still being blocked.
     68 assertUnoptimized(f, "no sync");
     69 // Let concurrent recompilation proceed.
     70 %UnblockConcurrentRecompilation();
     71 // Sync with optimization thread.  But no optimized code is installed.
     72 assertUnoptimized(f, "sync");
     73 
     74 f();                           // Trigger break point.
     75 assertEquals(1, listened);
     76 assertNull(exception);
     77