| // Copyright 2011 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: --allow-natives-syntax |
| |
| /** |
| * This class shows how to use %GetOptimizationCount() and |
| * %GetOptimizationStatus() to infer information about opts and deopts. |
| * Might be nice to put this into mjsunit.js, but that doesn't depend on |
| * the --allow-natives-syntax flag so far. |
| */ |
| function OptTracker() { |
| this.opt_counts_ = {}; |
| } |
| |
| /** |
| * The possible optimization states of a function. Must be in sync with the |
| * return values of Runtime_GetOptimizationStatus() in runtime.cc! |
| * @enum {int} |
| */ |
| OptTracker.OptimizationState = { |
| YES: 1, |
| NO: 2, |
| ALWAYS: 3, |
| NEVER: 4 |
| }; |
| |
| /** |
| * Always call this at the beginning of your test, once for each function |
| * that you later want to track de/optimizations for. It is necessary because |
| * tests are sometimes executed several times in a row, and you want to |
| * disregard counts from previous runs. |
| */ |
| OptTracker.prototype.CheckpointOptCount = function(func) { |
| this.opt_counts_[func] = %GetOptimizationCount(func); |
| }; |
| |
| OptTracker.prototype.AssertOptCount = function(func, optcount) { |
| if (this.DisableAsserts_(func)) { |
| return; |
| } |
| assertEquals(optcount, this.GetOptCount_(func)); |
| }; |
| |
| OptTracker.prototype.AssertDeoptCount = function(func, deopt_count) { |
| if (this.DisableAsserts_(func)) { |
| return; |
| } |
| assertEquals(deopt_count, this.GetDeoptCount_(func)); |
| }; |
| |
| OptTracker.prototype.AssertDeoptHappened = function(func, expect_deopt) { |
| if (this.DisableAsserts_(func)) { |
| return; |
| } |
| if (expect_deopt) { |
| assertTrue(this.GetDeoptCount_(func) > 0); |
| } else { |
| assertEquals(0, this.GetDeoptCount_(func)); |
| } |
| } |
| |
| OptTracker.prototype.AssertIsOptimized = function(func, expect_optimized) { |
| if (this.DisableAsserts_(func)) { |
| return; |
| } |
| var raw_optimized = %GetOptimizationStatus(func); |
| if (expect_optimized) { |
| assertEquals(OptTracker.OptimizationState.YES, raw_optimized); |
| } else { |
| assertEquals(OptTracker.OptimizationState.NO, raw_optimized); |
| } |
| } |
| |
| /** |
| * @private |
| */ |
| OptTracker.prototype.GetOptCount_ = function(func) { |
| var raw_count = %GetOptimizationCount(func); |
| if (func in this.opt_counts_) { |
| var checkpointed_count = this.opt_counts_[func]; |
| return raw_count - checkpointed_count; |
| } |
| return raw_count; |
| } |
| |
| /** |
| * @private |
| */ |
| OptTracker.prototype.GetDeoptCount_ = function(func) { |
| var count = this.GetOptCount_(func); |
| if (%GetOptimizationStatus(func) == OptTracker.OptimizationState.YES) { |
| count -= 1; |
| } |
| return count; |
| } |
| |
| /** |
| * @private |
| */ |
| OptTracker.prototype.DisableAsserts_ = function(func) { |
| switch(%GetOptimizationStatus(func)) { |
| case OptTracker.OptimizationState.YES: |
| case OptTracker.OptimizationState.NO: |
| return false; |
| case OptTracker.OptimizationState.ALWAYS: |
| case OptTracker.OptimizationState.NEVER: |
| return true; |
| } |
| return false; |
| } |
| // (End of class OptTracker.) |
| |
| // Example function used by the test below. |
| function f(a) { |
| return a+1; |
| } |
| |
| var tracker = new OptTracker(); |
| tracker.CheckpointOptCount(f); |
| |
| tracker.AssertOptCount(f, 0); |
| tracker.AssertIsOptimized(f, false); |
| tracker.AssertDeoptHappened(f, false); |
| tracker.AssertDeoptCount(f, 0); |
| |
| for (var i = 0; i < 5; i++) f(1); |
| |
| tracker.AssertOptCount(f, 0); |
| tracker.AssertIsOptimized(f, false); |
| tracker.AssertDeoptHappened(f, false); |
| tracker.AssertDeoptCount(f, 0); |
| |
| %OptimizeFunctionOnNextCall(f); |
| f(1); |
| |
| tracker.AssertOptCount(f, 1); |
| tracker.AssertIsOptimized(f, true); |
| tracker.AssertDeoptHappened(f, false); |
| tracker.AssertDeoptCount(f, 0); |
| |
| %DeoptimizeFunction(f); |
| |
| tracker.AssertOptCount(f, 1); |
| tracker.AssertIsOptimized(f, false); |
| tracker.AssertDeoptHappened(f, true); |
| tracker.AssertDeoptCount(f, 1); |
| |
| // Let's trigger optimization for another type. |
| for (var i = 0; i < 5; i++) f("a"); |
| %OptimizeFunctionOnNextCall(f); |
| f("b"); |
| |
| tracker.AssertOptCount(f, 2); |
| tracker.AssertIsOptimized(f, true); |
| tracker.AssertDeoptHappened(f, true); |
| tracker.AssertDeoptCount(f, 1); |