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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 // Flags: --turbo-deoptimization
     31 
     32 if (!%IsConcurrentRecompilationSupported()) {
     33   print("Concurrent recompilation is disabled. Skipping this test.");
     34   quit();
     35 }
     36 
     37 Debug = debug.Debug;
     38 
     39 function listener(event, exec_state, event_data, data) {
     40   if (event != Debug.DebugEvent.Break) return;
     41   try {
     42     assertEquals("foo", exec_state.frame(0).evaluate("a").value());
     43   } catch (e) {
     44     exception = e;
     45   };
     46   listened++;
     47 };
     48 
     49 var exception = null;
     50 var listened = 0;
     51 
     52 var f = function() {
     53   var a = "foo";
     54   var b = a.substring("1");
     55   [a, b].sort();
     56   return a;
     57 }
     58 
     59 f();
     60 f();
     61 %OptimizeFunctionOnNextCall(f, "concurrent");  // Mark with builtin.
     62 f();                           // Kick off concurrent recompilation.
     63 
     64 // After compile graph has been created...
     65 Debug.setListener(listener);   // Activate debugger.
     66 Debug.setBreakPoint(f, 2, 0);  // Force deopt.
     67 
     68 // At this point, concurrent recompilation is still being blocked.
     69 assertUnoptimized(f, "no sync");
     70 // Let concurrent recompilation proceed.
     71 %UnblockConcurrentRecompilation();
     72 // Sync with optimization thread.  But no optimized code is installed.
     73 assertUnoptimized(f, "sync");
     74 
     75 f();                           // Trigger break point.
     76 assertEquals(1, listened);
     77 assertNull(exception);
     78